Abstract: In an overlock sewing machine, a main shaft fixing operating shaft is provided with a differentiation ring that can be swung in a predetermined range such that, when the rotation of a main shaft is to be enabled, it is set to an enable state in a stationary state, and when the rotation of the main shaft is disabled, it is swung and shifted from the enable position. Furthermore, a looper cover open/closed detection configuration is configured by modifying a part of a typical known configuration. Such an arrangement provides an overlock sewing machine having a simple configuration that requires only a single micro switch to detect the switching between the threading mode and the sewing mode and to detect the open/closed state of the looper cover.

Abstract: A overlock sewing machine includes a switch limiting arm rockable integrally with a main shaft fixing operating arm and an arm including arms which are actuated by operating a threading switching knob to engage with the switch limiting arm to rock a rocking lever portion and being engageable with a slide plate to move the position of the slide plate to a sewing executable position upon operating the threading switching knob to the sewing executing position side.

Abstract: An embroidery sewing machine includes a storage device storing coordinate data of an embroidery pattern; an X-Y moving mechanism that moves an embroidery frame in X- and Y-directions based on the coordinate data; a display device that displays the embroidery pattern; a transparent touchscreen; a touch point detector that detects a position of touch on the touchscreen; a coordinate data extracting unit that extracts coordinate data within a certain distance from the detected position of touch; a coordinate data selecting unit that selects a coordinate data candidate from the extracted coordinate data; a candidate list display unit that displays a list of a needle position candidate based on the selected coordinate data; and a coordinate data supplying unit that supplies, when any needle position is specified, the X-Y moving mechanism with coordinate data of the specified needle position and moves the embroidery frame to the needle position.

Abstract: A sewing machine includes an upper shaft rotatable so as to drive a needle bar, a lower shaft rotatable so as to drive a feed dog, an upper-shaft pulley provided for the upper shaft, a lower-shaft pulley provided for the lower shaft, a belt linking the upper-shaft pulley with the lower-shaft pulley to synchronize respective rotations, and a belt adjusting mechanism contacting the belt and changing a belt length at a tensioned side of the belt where the belt is drawn in.

Abstract: The feed dog adjustment device, includes a feed rock shaft, rotatably attached to a sewing machine frame with an eccentric shaft provided at an eccentric position with respect, to a center, a feed rock shaft crank that, slides about the feed rock shaft, a feed bar rotatably attached to the feed rock shaft, crank, a feed dog provided on the feed bar, an actuator for inclination adjustment that rotates the eccentric shaft, and a controller that drives the actuator for inclination adjustment to adjust an inclination of the feed dog on a basis of data related to a type and stretchability of fabric.

Abstract: A presser foot of a sewing machine includes: a presser main body that presses a cloth; a guide base provided to the presser main body so as to form a single unit, and configured to guide a ribbon to be sewn to the cloth; a right guide and a left guide configured as members that are provided such that they can be relatively moved with respect to the guide base, that guide a position of the ribbon in the width direction, and that are arranged symmetrically with a position at which a sewing needle moves in a vertical direction as a base position; and an adjustment screw, a right guide bush, and a left guide bush, configured as a linking portion that links the movements of the right guide and the left guide such that they are positioned symmetrically with respect to the base position at all times.

Abstract: A presser foot for a sewing machine includes: a presser main body having an opening in which an upper feed dog is to be arranged, and configured to press a cloth; a rotational shaft connected to an upper feed mechanism of the sewing machine; a guide base provided to the presser main body so as to form a single unit, and configured to guide a ribbon; right and left guides configured as a pair of members provided such that they can be relatively moved with respect to the guide base, and to guide a position of the ribbon in the width direction, and arranged symmetrically with a position at which a sewing needle moves in a vertical direction as a base position; and an adjustment screw, right and left guide bushes, configured as a linking portion that links the movements of the right and left guides.

Abstract: An embroidery sewing machine having a function of fixing an interliner and a material by basting, and capable of performing embroidery sewing based on embroidery sewing data includes: a basting area accepting unit configured to perform an assisting operation for a user so as to allow the user to specify an area for basting according to a size of a material, and to accept the specification of the area for basting; a basting data generating unit configured to generate basting data according to the area accepted by the basting area accepting unit; and a basting executing unit configured to perform basting based on the basting data generated by the basting data generating unit.

Abstract: Provided is an embroidery pattern placement system including: an image-taking unit configured to take an image with an embroidery frame and cloth to be embroidered included in an image taking range; an image analyzing unit configured to analyze to make correspondence between the information of the embroidery frame obtained by the embroidery frame information obtaining unit and the embroidery frame in the image; a display control unit configured to display the embroidery pattern obtained by the embroidery pattern obtaining unit and at least a part of the image taken by the image-taking unit in an overlapping manner at an identical scale; and an operation unit configured to accept an operation from a user; an embroidery placement editing unit configured to determine a position and orientation of the embroidery pattern relative to the embroidery frame according to a content of the operation to the operation unit.

Abstract: A sewing machine includes an upper shaft rotatable so as to drive a needle bar, a lower shaft rotatable so as to drive a hook, an upper-shaft pulley attached to the upper shaft, a lower-shaft pulley attached to the lower shaft, a belt linking the upper-shaft pulley and the lower-shaft pulley, and synchronizing a rotation of the upper-shaft pulley and a rotation of the lower-shaft pulley with each other, a belt adjusting mechanism contacting the belt and changing a belt length at a tensioned side at which the belt is drawn, and a tensioner tensioning the belt in accordance with the change in the belt length of the belt at the tensioned side.

Abstract: A presser foot for a sewing machine, is attached to a lower end of a presser bar to press a fabric during sewing, the presser bar being supported by the sewing machine so as to be slidable in an up-down direction. An attachment shaft member is provided in the presser bar so as to be slidable, the attachment shaft member attaching the presser foot so as to be detachable from the presser bar, and an attachment portion is provided in the presser foot so as to be fixed to the lower end of the presser bar by the attachment shaft member. The attachment shaft member includes a holding shaft portion that holds the attachment portion in the presser bar, and two positioning shaft portions having different shaft diameters smaller than that of the holding shaft portion.

Abstract: A threading device of a sewing machine includes a flow path switching member, a base portion, and a plurality of thread introducing portions. The flow path switching member includes a gaseous body inlet portion for receiving a compressed gaseous body, a gaseous body outlet portion provided to communicate with the gaseous body inlet portion for exhausting the gaseous body, and a cylindrical outer surface portion at which the gaseous body outlet portion is opened. The base portion includes a cylindrical inner surface portion into which the cylindrical outer surface portion of the flow path switching member is inserted and for supporting the flow path switching member in a rotatable manner, and a plurality of flow paths formed to communicate with the cylindrical inner surface portion. The plurality of thread introducing portions are provided at the base portion to communicate with respective outlet sides of the plurality of flow paths.

Abstract: A sewing machine can detect a sewing target feeding length, and includes: a presser rod, a presser main body detachably mounted on the presser rod, a movable presser portion mounted on the presser main body such that it can be pressed in contact with a sewing target in the sewing operation, and such that it is movable with the sewing target in feeding and reverse feeding directions; a movement transmission portion configured having one end that can be coupled with the movable presser portion, and having an other end that receives a position change of the one end; a slide volume that detects the position change of the other end, and a calculation unit that calculates the position change of the movable presser portion based on the detection result obtained by the slide volume.

Abstract: A bobbin includes a bobbin main body including flanges at both ends of a bobbin winder spindle for winding the bobbin thread and an outer flange attached to one of the flanges (a second flange) of the bobbin main body. A gap in which a thread end of the bobbin thread is housed is provided between the outer flange and the flange of the bobbin main body.

Abstract: A presser foot has a rod pin and is received by an engagement groove provided with a presser holder. By measuring the resistance value of the rod pin, the rod pin is identified. Terminals are provided with the engagement groove, which contact the rod pin for measuring the resistance. The terminals are connected to a circuit that connects to a circuit of a presser bar. A receiving groove is formed at the presser holder, an inserting part is formed at the lower end of the presser bar, and the presser holder is connected to the presser bar by setting the inserting part in the receiving groove and fixing it. The terminals and the circuit are provided with the inserting part connecting to the electrical resistance measuring apparatus where the resistance of the rod pin is measured, then determination apparatus identifies the rod pin and a display informs the result.

Abstract: A zigzag width range setting apparatus 9 sets a minimum value and a maximum value of a zigzag width of a needle 62. When the sewing machine is in operation, if the minimum value of the zigzag width preset by the zigzag width range setting apparatus 9 is higher than 0, a zigzag action is performed in a minimum zigzag width at no operation of a knee lifter 2 (an amount of operation of zero), and if the minimum value is 0, the zigzag width of the needle 62 is 0 at zero amount of operation of the knee lifter 2, that is the zigzag action is not performed, and stitching is performed by moving the needle 62 widthwise in accordance with the amount of operation of the knee lifter 2. If the maximum value is changed by the zigzag width range setting apparatus 9 during the sewing machine stitch action, zigzag stitch in accordance with the changed maximum zigzag width is performed.

Abstract: A sewing machine includes a temporal memory that stores stitchwork data currently stitched, and a first CRC data converter unit that converts the stitchwork data into unique codes. A stitchwork status checking apparatus includes a temporal memory that stores stitchwork data, a second CRC data converter unit that converts the stitchwork data stored in the local temporal memory into unique codes, and a CRC data converter unit that compares the codes converted by the first CRC data converter unit with the codes converted by the second CRC data converter unit. The stitchwork data stored in the temporal memory of the stitchwork status checking apparatus is the stitchwork data currently stitched by the sewing machine and transferred via a wireless network.

Abstract: Provided is a sewing machine system including: a container case having a plurality of containers partitioned in a grid pattern; a detecting unit configured to detect a type of a thread spool contained in any of the containers and a contained position of the thread spool in the container case in association with each other; a detection result transmitting unit configured to transmit a result of the detection by the detecting unit to the sewing machine; a sewing machine provided separately from the container case; a detection result receiving unit provided for the sewing machine, and configured to receive the detection result from the detection result transmitting unit; and a display unit configured to display a type of a thread spool to be required during sewing and a contained position of the thread spool in the container case.

Abstract: A cord guide device that is attached to a guide attachment rod of a sewing machine body, the cord guide device including a disc-shaped cord guide in which a needle hole through which a sewing needle passes is provided in a center and in which a guide hole through which a piece of cord or the like passes is provided, the guide hole being positioned eccentrically with respect to the needle hole; a guide support board that supports an underside of the cord guide; a pressing holder that, by being connected to the guide support board, restricts an upper surface of the cord guide and holds the cord guide such that the cord guide is rotatable about the needle hole; and a rotation mechanism that rotates the cord guide according to a movement of a piece of cloth.