DE-102008036316-B4 - Edger

DE102008036316B4DE 102008036316 B4DE102008036316 B4DE 102008036316B4DE-102008036316-B4

Abstract

A binding machine (10), comprising: a pair of needles (13) formed by a right and a left needle, which are vertically movable by a sewing machine motor (16); a needle switching mechanism (71, 73, 74, 75) which is operational to switch a vertical movement state of the needles (13) between a state in which one of the needles (13) is moved vertically and a state in which both needles (13) are moved vertically; a pair of clamping feet (41) formed by a right and a left clamping foot, which holds a main sewing material (C) together with a binding patch (T) on an assembly table (11); a flap holding mechanism (55) which is operational to hold a flap sewing material (F) on an upper surface (41a) of one of the clamping feet (41); a material feed mechanism (40) which is operational to move the clamping feet (41) in a material feed direction (E); a first reflection area (41c) which is formed along the feed direction (E) on the upper surface (41a) of each of the clamping feet (41); a flap edge sensor (30) which emits a light in the direction of the first reflection area (41c) and receives the light reflected at the first reflection area (41c) to detect an edge of the flap material (F) based on a change in the received light, wherein the change is caused by the flap material (F); a second reflection area (41d) which is formed along the feed direction (E) on the upper surface (41a) of the clamping foot (41) adjacent to the first reflection area (41c); a flap slope sensor (35) which emits a light in the direction of the second reflection area (41d) and receives the light reflected at the second reflection area (41d) to detect the edge of the flap sewing material (F) based on a change in the received light, wherein the change is caused by the flap sewing material (F); a deviation calculation area (60) which calculates an end position deviation (DS) between seams (N) to be formed by the right and left needles (13) based on the positions of one of the clamping feet (41) on which the flap material (F) is held, wherein the flap edge sensor (30) and the flap slope sensor (35) detect the edge of the flap material (F) held on the clamping foot (41) accordingly when the clamping foot (41) is in the positions, and wherein the end position deviation (DS) corresponds to a slope (D3/D1) of the edge of the flap material (F) held by the flap holding mechanism (55); and a sewing control area (60) that performs a normal deviation stitch formation control with reference to the needle switching mechanism (71, 73, 74, 75), wherein the stitch formation of each of the seams (N), which are right and left seams, is started and stopped according to the calculated end position deviation (DS), characterized by the fact that the flap edge sensor (30) is provided individually for each of the clamping feet (41), the flap tilt sensor (35) is provided for only one of the clamping feet (41), on whose upper surface (41a) the second reflection area (41d) is formed, and The sewing control area (60) performs an inverted deviation stitch formation control with reference to the needle switching mechanism (71, 73, 74, 75), wherein the stitch formation of each of the seams (N), which are right and left seams, is started and stopped in such a way that the calculated end position deviation (DS) between the right and the left seam (N) is provided in the opposite direction, wherein the inverted deviation stitch formation control is based on the calculated end position deviation (DS) and the detection of the edge of the flap sewing material (F), which is mounted on the other of the clamping feet (41), for which the flap slant sensor (35) is not provided.

Inventors

Tetsuya Oosawa
Masaru Inui

Assignees

JUKI CORP.

Dates

Publication Date: 20260513
Application Date: 20080729
Priority Date: 20070731

Claims (3)

A binding machine (10) comprising: a pair of needles (13) formed by a right and a left needle, which are vertically movable by a sewing machine motor (16); a needle switching mechanism (71, 73, 74, 75) which is operable to switch a vertical movement state of the needles (13) between a state in which one of the needles (13) is moved vertically and a state in which both needles (13) are moved vertically; a pair of clamping feet (41) formed by a right and a left clamping foot, which holds a main sewing material (C) together with a binding patch (T) on an assembly table (11); a flap holding mechanism (55) which is operable to hold a flap sewing material (F) on an upper surface (41a) of one of the clamping feet (41); a fabric feed mechanism (40) which is operational to move the clamping feet (41) in a fabric feed direction (E); a first reflection area (41c) which is formed along the fabric feed direction (E) on the upper surface (41a) of each of the clamping feet (41); a flap edge sensor (30) which emits a light into emits light in the direction of the first reflection area (41c) and receives the light reflected from the first reflection area (41c) to detect an edge of the flap material (F) based on a change in the received light, wherein the change is caused by the flap material (F); a second reflection area (41d) which is formed along the direction of the material feed (E) on the upper surface (41a) of the clamping foot (41) adjacent to the first reflection area (41c); a flap slope sensor (35) which emits light in the direction of the second reflection area (41d) and receives the light reflected from the second reflection area (41d) to detect the edge of the flap material (F) based on a change in the received light, wherein the change is caused by the flap material (F); a deviation calculation area (60) which calculates an end position deviation (DS) between seams (N) to be formed by the right and left needles (13) based on the positions of one of the clamping feet (41) on which the flap material (F) is held, wherein the flap edge sensor (30) and the flap slope sensor (35) detect the edge of the flap material (F) held on the clamping foot (41) accordingly when the clamping foot (41) is in the positions, and wherein the end position deviation (DS) corresponds to a slope (D3/D1) of the edge of the flap material (F) held by the flap holding mechanism (55); and a sewing control area (60) that performs normal deviation stitch formation control with respect to the needle switching mechanism (71, 73, 74, 75), wherein the stitch formation of each of the seams (N), which are right and left seams, is started and terminated according to the calculated end position deviation (DS), characterized in that the flap edge sensor (30) is provided individually for each of the clamping feet (41), the flap angle sensor (35) is provided for only one of the clamping feet (41), on whose upper surface (41a) the second reflection area (41d) is formed, and the sewing control area (60) performs inverted deviation stitch formation control with respect to the needle switching mechanism (71, 73, 74, 75), wherein the stitch formation of each of the seams (N), which are right and left seams, is started and terminated such that the calculated end position deviation (DS) between the right and the left seam (N) is provided in the opposite direction, with the inverted deviation stitch formation control being based on the calculated end position deviation (DS) and the detection of the edge of the flap sewing material (F) which is mounted on the other of the clamping feet (41) for which the flap slope sensor (35) is not provided.
The edging machine (10) after Claim 1 , furthermore, comprising a selection means for selecting whether the normal deviation pattern control or the inverted deviation pattern control should be executed.
The edging machine (10) after Claim 2 , wherein the selection means (61) selects whether the normal deviation stitch formation control or the inverted deviation stitch formation control is to be executed, depending on which of the flap edge sensors (30), which are right and left flap edge sensors, has detected the edge of the flap sewing material (F).

Description

TECHNICAL AREA The present invention relates to a binding machine which can sew a flap-sewn material together with a binding patch onto a main sewing material, and relates in particular to a binding machine which can detect a chamfer of a side edge of a flap-sewn material by detecting a reflected light. REASONABLE STATE OF THE ART In binding work, a flap is often sewn together with a binding patch to cover the opening of a pocket. The flap is essentially rectangular, with a width corresponding to the pocket opening. However, due to recent diversification in clothing design, the pocket opening is sometimes designed to be slanted. In such cases, the flap must also be designed to have a parallelogram shape. The Japanese patent document JP 3 438 912 B2 Disclosing a binding machine capable of handling such a flap-shaped fabric with a parallelogram profile. The binding machine comprises a clamping foot mechanism with a pair of clamping feet, which holds and advances a main fabric together with a binding patch on a mounting table; a flap-holding mechanism that holds the flap-shaped fabric on one of the clamping feet; stitch-forming means for sewing the fabric advanced by the clamping foot mechanism; and flap sensors that detect light reflected from corresponding reflective surfaces of the clamping feet extending in a fabric-feed direction. In particular, each of the clamping feet has two rows of reflective surfaces, and two flap sensors are provided for each clamping foot, such that they correspond to the respective reflective surfaces. When the clamping feet are positioned with flap material mounted on one of the clamping feet, i.e., with flap material covering the reflective surfaces of the corresponding clamping foot, changes in the light intensity of the reflected light are detected by each of the corresponding flap sensors. This makes it possible to detect the position of the side edges of the material being sewn by monitoring changes in light intensity. Furthermore, it is also possible to detect the angle of the side edges of the material being sewn by calculating the difference between the timings at which the two flap sensors detect the change in light intensity. This means that by providing two flap sensors for a clamping foot, it is possible to calculate the slope of a side edge of the parallelogram-shaped flap sewing material at which stitch formation is started or ended. This slope is used as a parameter to determine an offset in the material feed direction between stitch formation start positions or stitch formation end positions of two parallel seams for binding (hereinafter this offset may also be referred to as "end position deviation"). Nowadays, pockets are often provided symmetrically on the right and left sides of a jacket or trousers. In such cases, and where the pockets have parallelogram-shaped openings, binding stitches to be made on the right-side fabric (i.e., the right main fabric) and binding stitches to be made on the left-side fabric (the left main fabric) do not have the same shape, but rather assume symmetrical forms. Therefore, scanning with the flap sensor, determining the angle of the flap fabric, and calculating the final position deviation must be performed separately for each binding operation on the right and left main fabrics. In particular, there are two ways to carry out the binding work on the right and left sides of the fabric in a situation described above. 13A and 13B They show a first method, in which the upper and lower ends of the right and left main sewing material CR, CL are placed on the same side. 14A and 14B show a second method in which the upper and lower ends of the right and left main sewing material CR, CL are placed on opposite sides. According to the first method, the flap sewing material is on the same side (the left side in the 13A and 13B) The stitch points S are placed regardless of which of the main sewing materials CR, CL (right and left) is to be subjected to the binding work. Therefore, the stitch formation process is always started with the flap sewing material F mounted on the left clamping foot. Accordingly, to detect the slope of the side edge of the sloping flap sewing material F, it is sufficient to provide two flap sensors only for the left clamping foot. However, in order to provide the pockets symmetrically on the right and left main sewing pieces CR, CL, the reference positions B for positioning the flap sewing piece F on the right and left main sewing pieces CR, CL must also be symmetrical. In the example of 13A and 13B The reference position B is set at a position where one of the corners of the flap sewing material F, which is closest to a matching side of the main sewing material along which the right and left main sewing material CR, CL fit together, is positioned. In other words, the corner of the flap piece F, which is to be positioned at reference position B on the left main piece CL, is the corner on an upstream side in a mater