Abstract: A sewing machine includes a sewing machine motor, a control device and a wearable sensor. The sewing machine motor is a vertical movement driving source of a needle bar. The control device controls the sewing machine motor such that a sewing pitch is set to be a predetermined value. The wearable sensor is attached on a body of an operator of the sewing machine to detect a moving amount of an attached portion of the wearable sensor. The control device controls the sewing machine motor based on the moving amount of the attached portion detected by the wearable sensor such that the sewing pitch is set to be the predetermined value.

Abstract: A sewing machine includes a vertical shuttle and a middle shuttle presser disposed at a front side of the vertical shuttle. The sewing machine includes a presser frame, an optical upper thread detector and a stitch skipping detection processor. The presser frame is movably supported between a pressing position at which the middle shuttle presser is pressed and a retract position separated from the pressing position. The optical upper thread detector is provided at the presser frame and is configured to detect passage of an upper thread using detecting light which passes through passage portions formed in the middle shuttle presser and which crosses a front side of a bobbin case of the vertical shuttle. The stitch skipping detection processor is configured to determine whether the passage of the upper thread is present based on an amount of received light of the detecting light from the upper thread detector.

Abstract: A sewing machine includes a sewing machine motor serving as a drive source for driving the vertical movement of a needle bar, a control part for controlling the sewing machine motor such that a sewing pitch coincides with a set value, and imaging part for imaging a seam formed in a workpiece at a needle drop position. The control part obtains the length of the most recent seam from an image of the most recent seam imaged by the imaging part and also compares the length of the most recent seam with the set value of the sewing pitch to thereby correct the number of rotations of the sewing machine motor.

Abstract: An overlock sewing machine includes a first switching part for switching an interlocked state where an upper knife drive part and an upper knife are interlocked and a released state where the upper knife drive part and the upper knife are not interlocked; a second switching part for switching the upper knife between a projection position and a retreat position; and an operation part for switching the first switching part and the second switching part between a first mode, a second mode, and a third mode.

Abstract: An overlock sewing machine includes an upper knife which is movable to a withdrawn position or a driving position, an upper knife driving unit which moves the upper knife, an interlocking switching unit which switches between an interlocking state in which the upper knife driving unit and the upper knife are interlock and a release state in which the upper knife driving unit and the upper knife are released, an upper knife position switching unit which switches the upper knife to the driving position or the withdrawn position, and an operating unit which drives the interlocking switching unit and the upper knife position switching unit such that the interlocking switching unit is brought into the interlocking state when the upper knife is switched to the driving position, and the interlocking switching unit is brought into the release state when the upper knife is switched to the withdrawn position.

Abstract: An electronic component mounting apparatus includes a head unit, component supply device, camera unit, and controller controlling the head unit and component supply device. The component supply device has a holder holding electronic component accommodating tapes, each having storage cells arranged in a row, the storage cells storing electronic components, and a feeder forwarding the electronic component accommodating tapes and moving the storage cells to a suction area where the electronic component can be suctioned by the nozzle. The camera unit is fixed to a head support, and captures an image of the suction area. The controller analyzes the image of the suction area obtained by the camera unit. When the controller determines that a portion of the electronic component accommodating tape in the suction area is a spliced portion based on a result of the analysis, the controller determines that the electronic component accommodating tape is changed.

Abstract: A surface mounting apparatus includes a mounting head which is movable in X and Y directions and which mounts an electronic component on a positioned board, and a board recognizing camera is fixed to a base and which moves integrally with the mounting head. A correction jig includes a correction mark which is imaged by the board recognizing camera, and an imaging result is used to correct temporal change in an interior portion of the camera including an optical system, and is fixed to the base.

Abstract: A production system which is centralizedly managed by a server so that electronic components fed from feeders are mounted on a board by each mounting apparatus, is configured so that the feeders are placed in predetermined placement regions of a feeder bank provided in the mounting apparatus, the server detects the placement regions where the feeders are placed, and manages the feeders and the placement regions in association with each other, and the mounting apparatus acquires management information from the server and automatically generates layout data indicating correspondence between the feeders and the placement regions.

Abstract: An electronic component mounting apparatus includes a head unit, component supply device, camera unit, and controller controlling the head unit and component supply device. The component supply device has a holder holding electronic component accommodating tapes, each having storage cells arranged in a row, the storage cells storing electronic components, and a feeder forwarding the electronic component accommodating tapes and moving the storage cells to a suction area where the electronic component can be suctioned by the nozzle. The camera unit is fixed to a head support, and captures an image of the suction area. The controller analyzes the image of the suction area obtained by the camera unit. When the controller determines that a portion of the electronic component accommodating tape in the suction area is a spliced portion based on a result of the analysis, the controller determines that the electronic component accommodating tape is changed.

Abstract: An electronic component mounting apparatus in which an electronic component may be checked to provide highly accurate and efficient electronic component mounting. The apparatus includes a camera unit fixed on a head support and images an electronic component absorbed or to be absorbed onto a nozzle. The camera unit contains a camera module including a camera obtaining an image, a first lighting section disposed adjacently on a side of the camera closer to the nozzle and emitting light toward an imaging region of the camera, a second lighting section disposed adjacently on a side of the camera farther from the nozzle and emitting light toward the imaging region of the camera, and a baffle; and a bracket fixed on the head support and supporting the camera, the first lighting section, the second lighting section and the baffle.

Abstract: Before a user starts the operation of an electronic component mounting apparatus, user's input representing as to whether the user is an operator, a programmer or a manager/maintenance person is accepted and further user level information representing degree of skill of the user as to the safety measures is accepted. The power supply of a mechanical portion operating a head portion is interrupted in accordance with the state of the apparatus including at least the user level information and the open/close state of a safety cover for covering the movable range of the head portion.

Abstract: A sewing machine is provided. The sewing machine includes a needle, a feed dog which feeds a workpiece in a feeding direction, a stitching motor which vertically moves the needle, a needle swinging motor which swings the needle in a direction orthogonal to the feeding direction, a memory in which basic coordinate data of basic buttonhole stitches having a basic stitching width is stored, an input device from which a stitching width is input, and a control device which creates a modified coordinate data based on the basic coordinate data and the stitching width input from the input device, and controls the stitching motor and the needle swinging motor based on the modified coordinate data to form buttonhole stitches having the stitching width input from the input device.

Abstract: A control device of a sewing machine includes a pressing member, a pressing frame supported by the pressing member, feed detecting means for detecting a position or a feeding amount of the pressing frame, a feed dog which feeds the workpiece in the cloth feeding direction every stitch in association with the pressing frame, a feeding motor which sets a cloth feeding amount of the feed dog, a storing portion which stores, in every stitch, an error between a target position or a target feeding amount of the pressing frame and a detected position or a detected feeding amount obtained by the feed detecting means, and control means operable, in every stitch, to determine a correction value from the errors in a plurality of stitches which are stored immediately before, and to control the feeding motor to drive with the cloth feeding amount corrected by the correction value.

Abstract: A thread tensioning device of a sewing machine for forming multiple types of stitches using a plurality of threads is provided. The thread tensioning device includes thread tensioners disposed to correspond to the threads, an adjusting mechanism coupled to the thread tensioners to select a stitch type and to simultaneously adjust the tensional force applied from each of the thread tensioners to the corresponding thread such that the tensional force is selected from reference tensional forces corresponding to the selected stitch type, fine adjustment mechanisms disposed to correspond to the thread tensioners and to be manually operable to finely adjust the tensional force applied from the corresponding thread tensioner to the corresponding thread, and a reset mechanism coupled to the fine adjustment mechanisms to resets at different timings and interlockingly with the adjusting mechanism an amount of the tensional force finely adjusted by each of the fine adjustment mechanisms.

Abstract: A threading device of a sewing machine is provided. The threading device includes a threading hook which moves forward to penetrate through an eye of a needle to capture a thread and which moves backward to insert the thread into the eye, a threading shaft which holds the threading hook at a lower end thereof, a threading movement input mechanism from which an operation for causing the threading hook to carry out a threading movement is input, an up-and-down member which moves, in accordance with the operation to the threading movement input mechanism, in up and down directions to rotate the threading shaft, a thread holding mechanism which holds the thread to be inserted into the needle, and a thread releasing mechanism which releases the thread that is held by the thread holding mechanism. The thread releasing mechanism releases the thread when the threading hook is moving backward.

Abstract: The thread cutting device of a sewing machine provides a first thread catching member having a first thread catching portion for catching a thread positioned between the horizontal shuttle and the needle hole and carrying out forward and backward movements below the throat plate while the first thread catching portion catches the thread, a second thread catching member having a second thread catching portion for catching the thread laid between the needle hole and the first thread catching portion and guiding the thread caught by the first thread catching member to a fixed blade and to cut the thread by the fixed blade.

Abstract: A thread cutting device of a sewing machine is provided. The thread cutting device cuts a thread extending between a horizontal shuttle and a throat plate of the sewing machine. The thread cutting device includes a fixed blade, a first thread catcher, a second thread catcher, a driving assembly which moves the first and second thread catchers such that the first thread catcher catches the thread before the second thread catcher catches the thread and pulls the thread toward the fixed blade to cut the thread, and a guide member disposed between the first thread catcher and the driving assembly. The guide member guides the first thread catcher from an advanced position to a thread catching position to catch the thread, and further guides the first thread catcher from the thread catching position to a standby position to turn the first thread catcher toward the fixed blade.