A feeding device of an industrial sewing machine comprises a shell base, a main connecting rack having a first bar portion and a second bar portion, a terminal driven rack mounted at the first bar portion and the second bar portion, a first driven rack, a raising-driven mechanism and a driving shaft. The first driven rack is mounted at the first bar portion and connected to the shell base, and has a first sliding recess. The raising-driven mechanism has a second driven rack mounted at the second bar portion and having a second sliding recess. A raising-connecting rod is mounted at the second driven rack and the terminal driven rack. The driving shaft has a first crank mounted through the first sliding recess and a second crank mounted through the second sliding recess. The feeding device has a compact volume to facilitate ease in maintenance.

A feeding device of an industrial sewing machine comprises a shell base, a main connecting rack having a first bar portion and a second bar portion, a terminal driven rack mounted at the first bar portion and the second bar portion, a first driven rack, a raising-driven mechanism and a driving shaft. The first driven rack is mounted at the first bar portion and connected to the shell base, and has a first sliding recess. The raising-driven mechanism has a second driven rack mounted at the second bar portion and having a second sliding recess. A raising-connecting rod is mounted at the second driven rack and the terminal driven rack. The driving shaft has a first crank mounted through the first sliding recess and a second crank mounted through the second sliding recess. The feeding device has a compact volume to facilitate ease in maintenance.

A sewing machine capable of replacing a feed dog in accordance with a type of sewing, the sewing machine including a feed bar performing a horizontal motion and a vertical motion by interlocking with a feeding mechanism, a feed dog detachably mounted on the feed bar, and a control unit that identifies the feed dog mounted on the feed bar. In the sewing machine, the feed dog includes an identification member that corresponds to a type of the feed dog, the feed bar includes a sensor that detects the identification member and outputs an identification signal, and the control unit includes a feed dog identifying means that, based on the identification signal from the sensor member, identifies the type of the feed dog mounted on the feed bar.

A sewing machine capable of replacing a feed dog in accordance with a type of sewing, the sewing machine including a feed bar performing a horizontal motion and a vertical motion by interlocking with a feeding mechanism, a feed dog detachably mounted on the feed bar, and a control unit that identifies the feed dog mounted on the feed bar. In the sewing machine, the feed dog includes an identification member that corresponds to a type of the feed dog, the feed bar includes a sensor that detects the identification member and outputs an identification signal, and the control unit includes a feed dog identifying means that, based on the identification signal from the sensor member, identifies the type of the feed dog mounted on the feed bar.

Provided is a sewing machine including: a pair of feed bars that are incorporated in a cylinder and are each capable of conveying a material by moving to draw elliptical trajectories in side view; an oil seal abutting outer surfaces of the pair of feed bars by surrounding an entire periphery in a direction intersecting a longitudinal direction of the pair of feed bars; and a seal-supporting unit provided on an inner wall of the cylinder and configured to support the oil seal, wherein the pair of feed bars are configured to be movable upward through the opening of the cylinder, the seal-supporting unit includes an upper opening that allows the pair of feed bars to move upward, and the seal-supporting unit is immovable relative to the cylinder when the pair of feed bars move upward through the opening.

A sewing machine capable of replacing a feed dog in accordance with a type of sewing, the sewing machine including a feed bar performing a horizontal motion and a vertical motion by interlocking with a feeding mechanism, a feed dog detachably mounted on the feed bar, and a control unit that identifies the feed dog mounted on the feed bar. In the sewing machine, the feed dog includes an identification member that corresponds to a type of the feed dog, the feed bar includes a sensor that detects the identification member and outputs an identification signal, and the control unit includes a feed dog identifying means that, based on the identification signal from the sensor member, identifies the type of the feed dog mounted on the feed bar.

A sewing machine capable of replacing a feed dog in accordance with a type of sewing, the sewing machine including a feed bar performing a horizontal motion and a vertical motion by interlocking with a feeding mechanism, a feed dog detachably mounted on the feed bar, and a control unit that identifies the feed dog mounted on the feed bar. In the sewing machine, the feed dog includes an identification member that corresponds to a type of the feed dog, the feed bar includes a sensor that detects the identification member and outputs an identification signal, and the control unit includes a feed dog identifying means that, based on the identification signal from the sensor member, identifies the type of the feed dog mounted on the feed bar.

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.

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.

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.