Kabushiki Kaisha Toyoda Jidoshokki Seisakusho

Daiwa Boseki Kabushiki Kaisha

Toshio Yoshizawa

Yoshiaki Yoshida

Takashi Kato

Yasuo Yamada

Tsutomu Miyazaki

Keiji Onoue

Shozo Ueda

Kozo Motobayashi

Osamu Suzuki

Yoshihisa Suzuki

Kazuo Seiki

Yoshiharu Yasui

Kinpei Mitsuya

Takashi Katoh

Kazuo Kamiya

Takeshi Ogasawara

Katsuaki Sugiura

Toshinori Taniguchi

Ichiro Tashiro

Tatsuo Kose

Kiyokazu Hori

Kazuo Ohchi

In a fiber opening device in open-end spinning unit, having a combing roller which is encased by a casing and forming a fiber transferring passage between said combing roller and said casing, a wear-resistant member, preferably a member having a pin shape, is provided at an edge of an opening, e.g. a trash exit port opening formed in said casing and communicated with said passage. The structure of the fiber opening device according to the present invention makes possible easy installation of the wear-resistant member, and prevents harmful wear or bruising at said edge portion of the opening in the casing.

Fiber opening device in open-end spinning unit

An open-end spinning machine having a plurality of spinning units (5) arranged side by side in a row extending in the longitudinal direction of the spinning machine. Each of the spinning units (5) has a filter (11) disposed at the front surface thereof and extending for substantially the entire width thereof. All the filters (11) arranged on the spinning units (5) disposed at one side of the spinning machine lie on a substantially identical imaginary plane slightly upwardly inclined from a horizontal plane when seen from the front to the rear. Each spinning unit includes a duct means (13) having air passages (15, 23, 27, 31) extending from the openings (13a, 13b, 13c, 13d) located adjacent to the filter (11) to the upper surface of a feeding roller (25), the upper and lower surfaces of a combing roller (21), and the periphery of the combing roller (21).

Open-end spinning machine

An improved bobbin holder utilized for each winding unit of a textile machine such as an open-end spinning frame or an automatic winder. To eliminate the undesirable influence caused by the possible shock or vibration imparted to the cradle arms of the bobbin holder during the yarn package forming operation, a damping device is disposed at a position between one of the cradle arms and a stationary part of the machine frame in such condition that a free end portion of the damper is connected to the cradle arm at least during the normal operation for forming a yarn package, and a mechanism for releasing the damping operation by the damping device is provided in the bobbin holder.

Bobbin holder

When an open end spinning machine is stopped, a fiber supply to a spinning rotor is first stopped and thereafter, substantially simultaneously with stoppage of both a yarn take-up roller and a yarn winding roller, a yarn end is held by a yarn holding device at a time when it still remains in a region which undergoes the suction effect of a subatmospheric pressure produced in the spinning rotor. The spinning rotor is subsequently stopped. On starting, the holding of the yarn end by the yarn holding device continues even after restarting of the spinning machine until the subatmospheric pressure produced in the spinning rotor reaches substantially the same value as that produced during a normal spinning operation. Therefore, there is prevented any snarling phenomenon, resulting in a greatly increased success rate in the operation of connecting yarn ends on re-starting of the spinning machine.

Method and apparatus for starting and stopping an open end spinning

An open end spinning machine includes a plurality of spinning units. Each spinning unit includes a first yarn breakage sensing device assuming a yarn sensing, operative position, in which it contacts the yarn, when the spinning unit is in a normal spinning operation and an inoperative position, in which it is not in contact with the yarn, when the spinning unit is in a transient condition either from or to the normal spinning operation, and a second yarn breakage sensing device assuming a yarn sensing position at least when the spinning unit is in the transient condition. Upon occurrence of yarn breakage when the spinning unit is in the transient condition, such breakage is detected by the second yarn breakage sensing device and the supply of fibers to the associated spinning unit is interrupted by the second yarn breakage sensing device.

Spinning units in an open end spinning machine

In an improved combing roller provided with a metallic wire mounted on a body thereof comprising a main cylindrical body and a pair of flanges coaxially formed at both ends of the main cylindrical body, a base portion of the metallic wire rigidly pressed into a right hand or a left hand helical groove formed in the main body and the working direction of the metallic wire coincide with the rotational direction of the combing roller, if one of flanges on a side of the combing roller corresponding to the direction of progress of an imaginary right hand screw imaginarily engaged with the above-mentioned right hand helical groove or an imaginary left hand screw imaginarily engaged with the above-mentioned left hand helical groove when the imaginary screws are turned in the direction corresponding to the rotational direction of the combing roller, is defined as a first flange, while the other flange is defined as a second flange, the axial size of the free cylindrical space formed at the side of the first flange is smaller than the axial size of the free cylindrical space formed at the side of the second flange.

Combing roller utilized for an open-end spinning machine

A yarn handling machine includes bobbins on which yarns are wound, forming cheeses. At the beginning of the yarn winding operation, transfer tail windings must be provided on the end of the bobbin. An arrangement for providing transfer tail windings includes a yarn guide movable between an operative position closely adjacent to the bobbin and an inoperative position spaced from the bobbin sufficient to prevent interference of the yarn guide with the formation of the cheese. In the operative position, the yarn guide serves for providing the transfer tail windings.

Arrangement for providing transfer tail windings on a bobbin

An apparatus for transporting yarn packages wound on cylindrical tubes from a process where the yarn packages are produced by textile machines to a subsequent process without touching any yarn layer thereof. A conveyer belt is disposed along the lengthwise direction of the above-mentioned textile machine so as to receive the yarn packages from the textile machine and the yarn packages are received by respective receiving rods which are utilized for carrying the yarn packages to the subsequent process. An auxiliary device for regulating the lengthwise direction of the tube of each yarn package in a condition of alignment with the receiving rod is disposed between the conveyer belt and the position where the receiving rod is capable of receiving the yarn package.

Apparatus for transporting yarn packages produced by a textile machine

An improved method and apparatus for making yarn packages of cheese form by winding units of a textile machine, wherein a bobbin of a yarn package is rotatably supported by each cradle turnably supported by a pivot shaft secured to a bracket in such a condition that the contacting pressure between a yarn package and a friction roller for rotating the yarn package is gradually decreased in an exponential manner according to the increase in the size of the yarn package and the above-mentioned change of the contacting pressure is attained by utilizing means for compensating the contacting pressure which connects the cradle with the bracket.

Method and apparatus for making yarn packages of cheese form by a

A yarn package transportation vehicle comprises a turnable table having a plurality of cylindrical containers arranged in circle thereon. Yarn packages produced by a spinning machinery are canistered in the containers. The vehicle is positioned adjacent to one end of the spinning machinery so that one of the canisters is set in a canistering position in which the canister receives the yarn packages therein. When one container is fully loaded with the yarn packages, adjacent container is readily brought into the canistering position by turning the table a predetermined angle.

Means for transporting yarn packages produced by spinning machinery

In a textile machine provided with displaceable means for carrying out an operation utilizing air pressure, a main duct is disposed along the length of the machine, and the main duct is provided with a longitudinal aperture covered with a flexible covering member which permits formation of a space by deforming the skirt portion of the covering member. A connecting pipe of the displaceable means is inserted into the main duct through the space and the connecting portion is sealed by a sealing member secured to the pipe during the displacement of the displaceable means.

Method and apparatus for continuously connecting a displaceable

An automatic method and apparatus is furnished for transporting yarn packages formed on the cylindrical tubes by a conveyer belt disposed adjacently along a textile machine or a group of textile machines and for transferring the yarn packages from the conveyer belt to receiving rods of a transporting means. In the apparatus, an auxiliary device for correctly transferring the yarn packages from the conveyer belt to the transporting means is satisfactorily utilized.

Method for transporting textile yarn packages

Apparatus for handling yarn ends during a donning operation on a textile machine wherein in each operation unit, a yarn package is formed on a bobbin rotatably held by a cradle and rotated by the friction roller of a take-up mechanism. Just before or after doffing a full yarn package from the take-up mechanism, a yarn passage is formed by a yarn which is continuously supplied from the operation unit at a position in front of a part of the peripheral surface of the friction roller which the yarn passes over during the normal take-up operation. A fresh bobbin urges the yarn of the yarn passage toward the friction roller and then the fresh bobbin held by the cradle is rested on the friction roller. The yarn connected to the full yarn package is severed during the operation.

Apparatus for handling a yarn end during a donning operation on a

An empty bobbin supply device for use in a doffing machine which travels in front of spinning units and is adapted for doffing a cheese and donning an empty bobbin in place thereof. This empty bobbin supply device has a reserve box, a reserve conveyor and a horizontal transfer conveyor, which are all positioned substantially in a vertical direction. An empty bobbin comes downwardly by gravity from the reserve box and is received between transfer plates of the reserve conveyor. The bobbin is then transferred downwardly by the circulating reserve conveyor, and in the absence of a bobbin on the horizontal transfer conveyor, the bobbin is delivered therefrom, while when a bobbin is present on the transfer conveyor, the bobbin remains on the reserve conveyor. The terminal of the horizontal transfer conveyor serves as a stand-by position for an empty bobbin in the doffing portion.

Growing community of inventors

Chiryu, Japan

Toshio Yoshizawa