Abstract

The present invention relates to an embroidery machine thread tension adjusting device. An embroidery machine thread tension adjusting device according to an embodiment of the present invention is provided for an embroidery machine comprising a needle bar, a thread take-up unit, a hook, and an embroidery frame, and is configured to adjust the tension of an upper thread withdrawn from a spool and supplied to a needle of the needle bar through the thread take-up unit. The embroidery machine thread tension adjusting device comprises: a thread pulling adjusting unit comprising a thread take-up lever disposed along a path of movement of the upper thread withdrawn from the spool and supplied to the needle so as to control the amount of pulling of the upper thread when rotating while maintaining contact with the upper thread, and a first actuator for providing the thread take-up lever with rotational driving power; at least one thread guide adjusting unit comprising a pair of thread guide units disposed on at least one of the front and rear ends of the thread pulling adjusting unit along the path of movement of the upper thread such that, when the upper thread passes, same are forced against each other while maintaining contact with the upper thread, thereby controlling frictional force of the upper thread, and a second actuator for providing the pair of thread guide units with driving power; and a controller for determining the status of driving of at least one of the needle bar, the needle take-up unit, the hook, and the embroidery frame according to each of multiple pieces of stitch information included in embroidery data, and controlling the driving of at least one of the first actuator and the second actuator provided in each of the at least one thread guide adjusting unit according to the result of determination, thereby adjusting at least one of the amount of pulling of the thread take-up lever and the frictional force of the upper thread supplied between the pair of thread guide units provided in each of the at least one thread guide adjusting unit.

IPC Classes  ?

• D05C 11/10 - Guides, e.g. resilient
• D05C 5/02 - Embroidering machines with arrangements for automatic control of a series of individual steps by electrical or magnetic control devices
• D05C 11/06 - Needle-driving or control mechanisms

Abstract

The present invention relates to a sewing head for an embroidery machine. The sewing head for an embroidery machine, according to an embodiment of the present invention, comprises: a head arm through which a driving axis passes; a needle holder driver comprising a needle holder control body which is installed to be able to reciprocate along a needle holder guide shaft installed on the head arm in the vertical direction and is coupled to or released from the needle holder when rotating about the needle holder guide shaft, and a needle holder driving link which moves the needle holder controller to reciprocate in the vertical direction due to a driving force provided from a driving shaft; a presser-foot driver comprising a presser-foot control body which is installed to be able to reciprocate along a presser-foot shaft installed on the head arm in the vertical direction and to which a presser-foot is coupled, a presser-foot driving link which reciprocates the presser-foot control body in the vertical direction, and a presser-foot driving motor providing the presser-foot driving link with a driving force; and a needle holder jump driver comprising a jump driving link which is rotatably installed on the head arm and rotates the needle holder control body when coming into contact with one side of the needle holder control body, a jump driving motor providing the jump driving link with a driving force, and a jump driving auxiliary link which is rotatably installed on the head arm and rotationally moves the jump driving link in the direction toward one side of the needle holder control body when coming into contact with one side of the presser-foot control body that moves in the vertical direction.

IPC Classes  ?

• D05C 11/06 - Needle-driving or control mechanisms
• D05C 9/20 - Movement of the base fabric controlled by the presser feetDriving arrangements therefor

Abstract

The present invention relates to an embroidery machine thread tension adjusting device. An embroidery machine thread tension adjusting device according to an embodiment of the present invention is provided for an embroidery machine comprising a needle bar, a thread take-up unit, a hook, and an embroidery frame, and is configured to adjust the tension of an upper thread withdrawn from a spool and supplied to a needle of the needle bar through the thread take-up unit. The embroidery machine thread tension adjusting device comprises: a thread pulling adjusting unit comprising a thread take-up lever disposed along a path of movement of the upper thread withdrawn from the spool and supplied to the needle so as to control the amount of pulling of the upper thread when rotating while maintaining contact with the upper thread, and a first actuator for providing the thread take-up lever with rotational driving power; at least one thread guide adjusting unit comprising a pair of thread guide units disposed on at least one of the front and rear ends of the thread pulling adjusting unit along the path of movement of the upper thread such that, when the upper thread passes, same are forced against each other while maintaining contact with the upper thread, thereby controlling frictional force of the upper thread, and a second actuator for providing the pair of thread guide units with driving power; and a controller for determining the status of driving of at least one of the needle bar, the needle take-up unit, the hook, and the embroidery frame according to each of multiple pieces of stitch information included in embroidery data, and controlling the driving of at least one of the first actuator and the second actuator provided in each of the at least one thread guide adjusting unit according to the result of determination, thereby adjusting at least one of the amount of pulling of the thread take-up lever and the frictional force of the upper thread supplied between the pair of thread guide units provided in each of the at least one thread guide adjusting unit.

IPC Classes  ?

• D05C 11/10 - Guides, e.g. resilient
• D05C 5/02 - Embroidering machines with arrangements for automatic control of a series of individual steps by electrical or magnetic control devices
• D05C 11/06 - Needle-driving or control mechanisms
• D05C 13/02 - Counting, measuring, indicating, warning, or safety devices

Abstract

A head unit fixed sewing machine is provided, which includes a table, support posts, an upper beam, a head unit and a bed unit. An object is placed on the table. The support posts are provided on opposite sides of the table. The upper beam connects the support posts to each other and is coupled to upper ends of the support posts. The head unit is fastened to the upper beam and has a head-unit-rotating means for rotating a sewing head within a predetermined range. The bed unit is provided below the head unit and has a bed-unit-rotating means for rotating a sewing bed within a predetermined range. Because the head unit and the bed unit can be rotated while sewing, the orientation of a sewn thread can be maintained constant. Hence, a perfect stitch can be realized over the entirety of the object.

IPC Classes  ?

• D05B 1/00 - General types of sewing apparatus or machines without mechanism for lateral movement of the needle or the work or both
• D05B 15/00 - Machines for sewing leather goods
• D05B 23/00 - Sewing apparatus or machines not otherwise provided for
• D05B 21/00 - Sewing machines with devices for automatically controlling movement of work-carrier relative to stitch-forming mechanism in order to obtain particular configuration of seam, e.g. programme-controlled for sewing collars, for attaching pockets

Goods & Services

embroidery machines, sewing machines for home and industrial use, industrial robots used for sewing and embroidering; and servo motors used for sewing and embroidery machines

Goods & Services

Embroidery machines, sewing machines for home and industrial use, industrial robots used for sewing and embroidering; and servo motors used for sewing and embroidery machines