Kabushiki Kaisha Toyoda Jidoshokki Seisakusho

Kabushiki Kaisha Toyota Chuo Kenkyusho

Takashi Katoh

Kazuo Seiki

Yoshiaki Yoshida

Keiji Onoue

Susumu Otani

Junzo Hasegawa

Yasutaka Hayashi

Yasuhiko Suzuki

Toshio Yoshizawa

Takahiko Tsunekawa

Akira Tanaka

Hideo Hidaka

Singo Oda

Yoshinobu Takeyama

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

An open-end spinning unit has a housing having a cylindrical space, with a complementary cylindrical fiber-opening roller disposed in that space which communicates with a dust removing chamber having a dust separating zone and a dust discharge promoting zone, said zones being connected together through an intermediate passage positioned on the downstream side of a dust removing opening communicating with said space, a wall portion of the casing defining a downstream side of the dust separating zone being comprized by an inclined wall which faces an end portion of a partition separating said zones, the partition having an end wall which is inclined with respect to the vertical direction at an angle equal to or smaller than an angle of inclination of the inclined wall.

Dust removing mechanism in open-end spinning frame

In the open-end spinning unit provided with a casing and a combing roller rotatably mounted in the casing, a spinning rotor producing a twisted yarn from individual fibers carried from a combing zone defined by the combing roller, a carrying space formed between the combing roller and the inside surface of the casing, a mechanism for feeding a bundle of fibers into an upstream terminal of the carrying space, a dust removing mechanism communicated with the carrying space for discharging dust particles separated from useful fibers carried to the spinning rotor, and a combing roller provided with a plurality of combing elements, helically mounted on a main cylindrical surface thereof, the inside top or bottom surface of the dust removing formed in the dust removing mechanism is projected inside to a level corresponding to a level defined by an imaginary plan of a rotational trace of either one of the terminal ends of the combing elements helically mounted on a cylindrical body of the combing roller, in the condition relative to the possible flying direction influenced by the component force of the centrifugal force created by the high speed motion of said combing elements of the combing roller.

A spinning machine is disclosed, which generally comprises a spinning rotor having a frusto-connical fiber sliding surface consisting of a first fiber sliding portion, onto which discrete fibers are first supplied, and a second fiber sliding portion connected to the first fiber sliding portion, a bottom surface, and a fiber collecting groove formed between the second fiber sliding portion and the bottom surface. The spinning machine further comprises a yarn take-up tube centrally extending into the spinning rotor to take up a spun yarn therethrough. The first fiber sliding portion forms an angle (.alpha.) with a plane of rotation of the spinning rotor larger than an angle (.beta.) formed by the second fiber sliding portion with respect to the same plane. The bottom surface of the spinning rotor includes a fiber guide portion, which forms the fiber collecting groove in cooperation with the second fiber sliding portion and is inclined at an angle (.delta.) with respect to the plane of rotation. This angle (.delta.) is so selected as to fulfill the condition .delta.=.epsilon..+-. about 5.degree., where angle .epsilon. is a measure of the inclination of the yarn taking off line, with respect to the plane of rotation, connecting the lowermost point of the yarn take-up tube with an intersection of the second fiber sliding portion and the fiber guide portion.

Open end rotor for a spinning machine

A method and apparatus for controlling the sliver thickness variation in a carding machine. The thickness variation of the sliver delivered from the carding machine is measured and an electrical signal corresponding to the thickness variation of the carded sliver is issued. A difference signal is created by comparing the above-mentioned electric signal, and a control pulse signal in accordance with the difference signal is intermittently created at predetermined time intervals, each of said time intervals being shorter than a time required for a length of the carded sliver which length corresponds to a long term variation of the carded slivers thickness. The supply amount of fiber tufts to the carding machine is intermittently adjusted for reducing the above-mentioned control signal toward zero by said control pulse signal at each of said time intervals.

Method and apparatus for controlling the sliver-thickness variation in a

In a high production card, a taker-in undercasing without slits or apertures is disposed beneath a taker-in roller of a card and a suction device is disposed above the taker-in roller. A taker-in cover is mounted atop the taker-in roller and defines therebetween a sealed space in communication with the suction device, which suction device controls the air pressure in said space between the taker-in roller and the taker-in undercasing, so that impurities such as trash are mainly removed from the supplied fibers at a free space below the taker-in roller formed at a position upstream from the taker-in undercasing, and short fibers are separated from successive fibers mainly by the action of the suction device.

Taker-in-part of the conventional flat card

A method for driving a Tandem carding machine provided with a fiber tufts supply means, a first and second carding machine, a first web transfer means disposed between the first and second carding machine, a second web transfer means for transferring a continuous web to a coiler motion mechanism, in which the lickerin roller, carding cylinder and a flat mechanism of the second carding machine are driven by a second driving motor while the other rotating elements are separately driven by a first driving motor. To control the sequential motion of the above-mentioned two series of driving mechanisms, said first and second driving motors are electrically connected.

Driving method and apparatus for a tandem carding machine

Safety device of a carding machine provided with a pair of crushing rollers wherein a scraping plate is urged to the cylindrical surface of each crushing roller for the entire length thereof. Each scraping plate is turnably supported by a pin so that it can be moved away from the corresponding crushing roller when required. The turning motion of each scraping plate away from or toward the corresponding crushing roller, can be carried out simultaneously by means for setting the position of each scraping plate and a manually operable handle which actuates the setting means. The main driving motor of the carding machine is connected, in series with a main switch and a control switch, to an electric source. The control switch is closed when the handle is operated so as to fix the scraping plates in contacting condition with the corresponding crushing rollers and, on the other hand, the control switch is opened when the scraping plates are moved away from the corresponding crushing rollers.

Safety device of a carding machine provided with a pair of crushing

An improved method and apparatus for plucking fiber tufts from a fiber bale held by a supporting frame which is reciprocally displaced along a carrying passage over a plucking roller. A pair of conveyer means are disposed with an intervened space therebetween and the plucking roller is disposed in the abovementioned intervened space. An auxiliary conveyer means is disposed at a position adjacently outside one of the conveyer means. These three conveyer means are arranged in an alignment. The supporting frame is capable of being reciprocally displaced by the conveyer means between displacing terminals on said conveyer means and is capable of being displaced to a waiting position on one of the conveyer means which is outside of the displacing terminal on that conveyer means and at a side of the auxiliary conveyer means. A door means of the supporting frame is opened during the displacing motion of the supporting frame to the waiting position, and then a fresh fiber bale reserved on the auxiliary conveyer means is supplied into the supporting frame, thereafter the supporting frame is displaced to the normal operational position thereof. A loading plate is mounted on the supporting frame so as to uniformly press the fiber bale during the bale plucking operation. All of the above-mentioned operations are carried out automatically.

Growing community of inventors

Toyota, Japan

Takashi Katoh