Shima Seiki Mfg., Ltd.

Shima Seiki Manufacturing Limited

Shima Seki Mfg., Ltd.

Kenji Ikoma

Toshiaki Morita

Reiji Arikita

Masahiro Shima

Taichi Imai

Yoshiaki Hashimoto

It is an object of the present invention to provide a cutting machine capable of keeping an angle of a cutting edge constant. A support blockis provided with two armswhich are spaced at a certain angle, and the armshave rotation shaftsof rotary whetstones, respectively, extending upright from the vicinities of the front ends thereof. The rotary whetstoneshas, at front ends thereof, flat surfacesperpendicular to the rotation shaftsto grind the one sideand the other sideof the cutting edgeof the cutting blade, respectively. The whetstone holding mechanismcan be moved linearly along the guide shaftand can change over grinding states in which the flat surfacesof the rotary whetstonesinto contact with the one sideor the other sideof the cutting blade. Even when the grinding progresses, since parallelism between the flat surfacesand the one sideand the other sideof the cutting blade, so that the angle of the cutting edge is kept constant.

Cutting machine

It is an object of the present invention to provide a cutting machine capable of sharpening in such a manner that an angle of a cutting edge can be kept constant. A support blockis provided with two armswhich are spaced at a certain angle, and the armshave rotation shaftsof rotary whetstones, respectively, extending upright from the vicinities of the front ends thereof. The rotary whetstoneshas, at front ends thereof, flat surfaces perpendicular to the rotation shaftsto sharpen the one sideand the other sideof the cutting edgeof the cutting blade, respectively. The whetstone holding mechanismcan be moved in parallel linearly or can swing almost linearly, as mainly indicated by the arrow, to bring the flat surfaceof the rotary whetstoneinto contact with the one sideof the cutting blade, as depicted by a broken line, thereby allowing the switch to the sharpening state. Even when the sharpening progresses, since parallelism between the flat abrasive surfaceand the one sideof the cutting blade and between the flat abrasive surfaceand the other sideof the cutting blade is kept, the angle of the cutting edge is kept constant.

A vibration damping device is described that dampens vibration produced during the conversion of rotational motion into reciprocal motion. The damping is performed using a simple structure wherein first and second conversion mechanisms are symmetrically arranged with respect to a plane of symmetry, first and second rotating shafts rotate opposite to each other at a constant speed, and the rotational motion is converted into reciprocal motion. The total of mass acting on gravity centers of a first balancer and a second balancer is approximately equal to the total of mass reciprocally driven by a first driving shaft and a second driving shaft. Both gravity centers are positioned 180 degrees to the first driving shaft and second driving shaft across the axes of the first rotating shaft and second rotating shaft. As a consequence, the forces in the direction of an axis can be balanced suppressing vibration.

Vibration damping apparatus for reciprocating drive and cutting head

[PROBLEMS] To provide a yarn feeder in the yarn feeding device of a weft knitting machine in which a fabric having uniform stitches can be produced with high productivity without increasing the size of the yarn feeder. [MEANS FOR SOLVING PROBLEMS] In a switching mechanism arranged to switch a yarn feeder from feeding position to standby position while interlocking with selection release operation of a hauling means after feeding the yarn by setting the oscillating direction to the standby position of the yarn feeder after feeding the yarn, a neutral position holding means operated to be interlocked with the hauling means to hold the neutral position of the yarn feeder in a vertical altitude raised above the yarn feeding position is provided.

Yarn feeder of yarn feeding device for weft knitting machine

Yarn feeders are arranged such that feeder case portions are slidably engaged with a knitting yarn guide rail disposed on an upper portion of needle beds, and can be selectively brought by a bringing device. Each of the feeder cases is provided with a switching mechanism for switching a yarn feeding port to a feeding position and a waiting position by swinging the port. The switching mechanism is operated at a time during which a yarn feeder selected by the bringing device is brought from a stop state in order to feed yarn. The yarn feeding port is switched from the waiting position to the feeding position, a swinging direction of the yarn feeding port to the waiting position, after it feeds yarn, is set, and the yarn feeding port can be switched from the feeding position to the waiting position in association with a selection cancel operation of the bringing device after the yarn is fed.

Yarn feeders of flat knitting machine

A flat knitting machine ( ) comprising a number of needles ( ) arranged in needle grooves ( ) formed on needle beds ( ) in such a manner as to be freely advanced or retracted; sinkers ( ), arranged between the needles ( ), to work to form loops; and at least a pair of front and back needle beds having a front edge portion ( ) and arranged to confront each other across a needle bed gap, wherein the sinker ( ) and the front edge portion ( ) of the needle bed are both supported on the needle bed in such a manner as to be movable in an advancing and retracting direction of the needle and also control means ( ) is provided for controlling an advanced or retracted motion of both of the sinker ( ) and the front edge portion ( ) of the needle bed, to adjust a dimension of the needle bed gap between the front and back needle beds ( ).

Flatbed knitting machine

A yarn carrier comprises a carrier base, a reciprocator, a feeder, and a movement converter. The reciprocator is supported on the carrier base to move in reciprocation with a traveling direction of the carrier base. An engaging surface is temporarily engageable with an accompanying member of a carrier accompanying device. The feeder, has a main-yarn feeding hole and a plating-yarn feeding hole, and supports at least one of the yarn feeding holes to freely rotate about an axis in a longitudinal direction of the feeder. The movement converter converts reciprocating movement of the reciprocator into rotation movement of the yarn feeding holes provided in the feeder, such that when the reciprocator is moved with its engaging surface engaged with the accompanying member, the yarn feeding holes can be rotationally displaced to change a positional relationship between the main-yarn feeding hole and the plating-yarn feeding hole.

Yarn feeding device of flat knitting machine

An end yarn inserting device that is so constructed that an end yarn hook can be put into action only when necessary but otherwise be retreated to such a position in the vicinity of a needle bed gap as to avoid interfering with knitting members including a yarn feeder and knitting needles. The end yarn inserting device includes guide rails, an end yarn inserting portion including an end yarn hook, and first and second control portions for controllably moving the end yarn hook to a desired position on the needle bed in the X-axis direction and the Y-axis direction, wherein an end yarn hook having a hook portion for retaining a cross-over yarn thereon and an end yarn hook presser foot having a presser foot portion are superposed on each other and swingably journaled around a journal portion provided on a base sidably supported on the guide rail; wherein the end yarn hook and the end yarn hook presser foot are so arranged as to be swung between their retreated positions and their lowered positions in association with the second control portion; and wherein control means for permitting back and forth swinging motions of the hook portion and the hook presser foot are provided between the end yarn hook and the base.

End yarn inserting device of flat knitting machine

A flat knitting machine has a blower that is connected to a nozzle via a plastic tube, a base duct and a joint. The base duct is mounted on a rear cover of the flat knitting machine parallel to a needle bed and is rectangular in section. A long slit covered by a belt is provided on top of the base duct. The joint has three rollers, two of which make the belt contact the slit. The third roller peels the belt from the slit to connect the nozzle and the base duct. When the nozzle is connected to the carriage and travels over the needle beds, the needle beds are cleaned.

Needle bed cleaner for a flat knitting machine

A flat knitting machine comprising: at least a pair of front and rear needle beds defining a gap therebetween; and a set-up device disposed below said gap, said set-up device including: a plurality of setting-up needles, each having a setting-up needle base member and a setting-up needle slider member, the setting-up needle slider member being movable relative to the setting-up needle base member to selectively hold and release a set-up portion of a knitted fabric; a setting-up needle bed supporting the plurality of setting-up needles so that the plurality of setting-up needles are juxtaposed to one another and that each of the setting-up needles is movable in both a fabric pull-down direction and a direction opposite thereto; first biasing means for biasing each of the setting-up needles in the fabric pull-down direction relative to the setting-up needle bed; and setting-up needle hold and release means for moving the setting-up needle slider member relative to the setting-up needle base member to thereby control the setting-up needle slider member to hold and release the set-up portion of said knitted fabric.

Flat knitting machine comprising a set-up device

Knitting fabric take-down devices, located in front and back of and facing each other across a knitting fabric passageway formed under a needle bed gap between at least a pair of front and back needle beds of a flat knitting machine, for taking down a knitting fabric. Each of the knitting fabric take-down device includes a front knitting fabric take-down mechanism for capturing only a front part of the knitting fabric in the knitting fabric passageway and taking it down; a back knitting fabric take-down mechanism for capturing only a back part of the knitting fabric and taking it down; and a take-down force adjusting mechanism for adjusting a take-down force of each of the knitting fabric take-down mechanism. The front and back knitting fabric take-down mechanism each comprises a plurality of take-down members which are arranged along a longitudinal direction of the needle beds and are each adapted to be sequentially or individually actuated to take down the knitting fabric in the knitting fabric take-down operation.

Knitting fabric take-down device of flat knitting machine

A cutting head is provided also with a notching blade to enable it to cut a length shorter than the blade width of a round blade. In order to eliminate the need for compressed air supplying equipment and simplify the mechanism thereby to make it compact and light weight, an angular displacement servo motor is used as a common drive source for causing angular displacement of the round blade and angular displacement of the notching blade. A cam motor causes a round blade cam and a notching blade cam to make angular displacement thereby to selectively cause the round blade and the notching blade to work on sheet material placed on a cutting table an cut it.

An automatic lubricating device for a cutting head of a cutting machine. The lubricating device is assembled within the cutting head and includes a pressure cylinder for forcing lubricating oil through a passage to a sump from which the lubricating oil is forced through a jet onto the cutter device mechanism. The lubricating device can be operated just prior to cutting or just after a cutting procedure with the cutting blade in an up or a down position.

Automatic lubricating device for a cutting head of a cutting machine

In the apparatus for drawing down knitted fabrics, a fixed position roller, a pressure roller and a drive for the rollers are located below mountainously opposed needle heads. The contact pressure between the rollers is controlled by a pivot mechanism including a cam driven by a motor and a spring connected to the cam and also connected to a pivot arm supporting the pressure roller. Rotation of the cam controls the spring force exerted on the pivot arm by the spring and thus controls movement of the pivot arm to lessen or increase contact pressure between the rollers.

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Wakayama, Japan

Kenji Ikoma