The present invention relates to a structure for fastening composite structures, and more particularly, to a sewing machine for stitching composite materials which is capable of automatically and continuously stitching the composite structures by using a high-rigidity fiber in order to laminate and join the composite materials. The sewing machine for stitching composite materials according to the present invention automatically and continuously performs a stitching operation for joining composite materials by using a high-rigidity composite fiber for joining the composite materials, and as a result, it is possible to reduce process time for joining the composite materials and improve productivity.

The present invention relates to a structure for fastening composite structures, and more particularly, to a sewing machine for stitching composite materials which is capable of automatically and continuously stitching the composite structures by using a high-rigidity fiber in order to laminate and join the composite materials. The sewing machine for stitching composite materials according to the present invention automatically and continuously performs a stitching operation for joining composite materials by using a high-rigidity composite fiber for joining the composite materials, and as a result, it is possible to reduce process time for joining the composite materials and improve productivity.

An embroidery frame transport device includes a carriage, an engagement mechanism, and a release member. The carriage is configured to detachably mount with a coupling portion of an embroidery frame. The engagement mechanism is configured to engage with the coupling portion by moving the embroidery frame in a mounting direction in a case where the coupling portion is mounted on the carriage, to restrict the embroidery frame from moving in a removing direction. The removing direction is in a direction opposite of the mounting direction. The engagement mechanism is provided on the carriage. The release member is configured to release engagement between the engagement mechanism and the coupling portion. The release member is provided on the carriage. The release member is configured to press the embroidery frame in the removing direction.

A method for embroidering three-dimensional workpieces (2) uses an embroidery machine (100) with at least one embroidery head (101) for embroidering and at least one embroidery frame (1) for positioning the workpiece (2). The workpiece (2) is moved by means of the embroidery frame (1) by at least two angles (?, ?, ?) in relation to at least two axes (X, Y, Z), which are in relation to the movement axis of the embroidery head (101) positioned to introduce at least one stitch of embroidery into the workpiece (2).

An embroidery frame transport device includes a carriage, a guide portion, a rotation shaft, and a lock release lever including a first restricting portion and a contact portion. The lock release lever is configured to rotate to a first position and a second position around the rotation shaft. The first restricting portion contacts the coupling portion to restrict an embroidery frame from moving in a removing direction by moving to the first position when the embroidery frame is moved in a mounting direction in a process of mounting the coupling portion on the carriage. The contact portion contacts the coupling portion and presses the embroidery frame in the removing direction as a result of the lock release lever moving to a third position when the lock release lever is rotated in a releasing direction while the coupling portion is mounted on the carriage.

An embroidery frame transport device includes a carriage, a guide portion, a rotation shaft, and a lock release lever including a first restricting portion and a contact portion. The lock release lever is configured to rotate to a first position and a second position around the rotation shaft. The first restricting portion contacts the coupling portion to restrict an embroidery frame from moving in a removing direction by moving to the first position when the embroidery frame is moved in a mounting direction in a process of mounting the coupling portion on the carriage. The contact portion contacts the coupling portion and presses the embroidery frame in the removing direction as a result of the lock release lever moving to a third position when the lock release lever is rotated in a releasing direction while the coupling portion is mounted on the carriage.

Reconfigurable fabric frame for a maneuverable sewing machine. In one example embodiment, an example reconfigurable fabric frame may include a take-up pole, an idler pole, a backing pole, a quilt-top pole, and side rails. The side rails may include take-up pole attachment locations, idler pole attachment locations, backing pole attachment locations, and quilt-top pole attachment locations. The side rails may be reconfigurable between a first configuration and a second configuration. In the first configuration, the backing pole attachment locations may be higher than the quilt-top pole attachment locations. In the second configuration, the backing pole attachment locations may be lower than the quilt-top pole attachment locations.

An embroidery frame includes a pair of a first frame and a second frame configured to clamp a sewing object, and a lock mechanism. The lock mechanism is configured to switch a position of the second frame with respect to the first frame to at least three positions including a first position, a second position and a third position. The first position is a position in which the second frame is closed with respect to the first frame. The second position is a position in which, with respect to the first frame, the second frame is more open, by a first predetermined amount, than in the first position. The third position is a position in which, with respect to the first frame, the second frame is open by a second predetermined amount. The second predetermined amount is larger than the first predetermined amount.

An embroidery frame includes a pair of a first frame and a second frame configured to clamp a sewing object, and a lock mechanism. The lock mechanism is configured to switch a position of the second frame with respect to the first frame to at least three positions including a first position, a second position and a third position. The first position is a position in which the second frame is closed with respect to the first frame. The second position is a position in which, with respect to the first frame, the second frame is more open, by a first predetermined amount, than in the first position. The third position is a position in which, with respect to the first frame, the second frame is open by a second predetermined amount. The second predetermined amount is larger than the first predetermined amount.

An embroidery frame includes a pair of a first frame and a second frame configured to clamp a sewing object and a lock mechanism. The lock mechanism includes a support member configured to rotatably support the second frame such that a posture of the second frame with respect to the first frame to clamp the sewing object is switchable to a first posture and a second posture. The first posture is a posture in which a first surface of the second frame faces the first frame. The second posture is a posture in which a second surface of the second frame faces the first frame. The second surface is on the opposite side to the first surface. The lock mechanism is configured to press the second frame in at least the first posture toward a first frame side with respect to the second frame.