DE102008010353B4 - edging machine - Google Patents

Abstract

A binding machine (10) comprising: two needles (41) arranged separately from each other to form two parallel straight seams (TL, TR) on a main fabric (M) and a binding patch (B); a needle vertical movement mechanism (40) which moves the two needles (41) in a vertical direction (Z);a work feed mechanism (20) which holds the main work (M) and the binding patch (B) and feeds it in a work feed direction (F);a movement meter mechanism (50) which moves a rectilinear incision (S) between the two straight line seams (TL, TR);a pair of corner knife mechanisms (100A, 100B) arranged so as to correspond to respective end parts of the straight line incision (S), each of the corner knife mechanisms (100A, 100B) forming corner cut parts (VFL, VFR, VRL, VRR) between the corresponding one of the end parts of the straight cut (S) and each of the adjacent end parts of the two straight line seams (TL, TR); andcontrol means (81) that controls each of the mechanisms (40, 20, 50, 100A, 100B) to form the two straight seams (TL, TR) such that positions of the adjacent end parts of the two straight seams (TL, TR) in of the work feed direction (F) are different from each other, and to form the corner cut parts (VFL, VFR, VRL, VRR) sloping from the respective end parts of the two straight seams (TL, TR) toward the straight cut (S), each the pair of corner knife mechanisms (100A, 100B) comprises: a plurality of corner knives (101, 102, 103, 104) forming corner cut parts (VFL, VFR, VRL, VRR) on respective sides of the straight line seam (S) with different cut lengths; and a vertical movement mechanism (130) which moves the selected pair of corner knives in the vertical direction (Z), and wherein the edging machine (10) further comprises: deviation setting means (85) storing information regarding a deviation adjustment (CF, CR) between the adjacent end parts of the two linear seams (TL, TR) in the work feeding direction (F);deviation deciding means (81) which, based on the information regarding the deviation, decides whether the deviation (CF, CR) exceeds or does not exceed a threshold; andcorner cut part inside/outside deciding means (81) which decides whether each of the corner cut parts (VFL, VFR, VRL, VRR) coming from each of the adjacent end parts of the straight seams (TL, TR) toward the straight cut (S). are to be formed, with respect to a center of the straight incision (S) in the cloth feed direction (F), on an inner side or an outer side;wherein the control means (81) controls the cloth feed mechanism (20) and the corner knife mechanisms (100A, 100B) such control that when the deviation deciding means (81) decides that the deviation (CF, CR) is smaller than the threshold value, each of the inside corner cut parts is formed at a position opposite to the position of the corresponding one of the outside corner cut parts in the work feeding direction (F ) is shifted by the deviation (CF, CR); characterized in that each of the pair of corner knife mechanisms (100A, 100B) has a selection mechanism comprises a mechanism (120, 220) which selects a pair of corner knives from the plurality of corner knives (101, 102, 103, 104) for the respective sides of the rectilinear incision (S), and that the control means (81) controls the selection mechanism (120 , 220) control such that when the deviation decision means (81) decides that the deviation (CF, CR) is larger than the threshold value, the corner knives (102, 104) with longer incision lengths for the respective outer corner incision parts are selected than in Comparison with a case where the deviation (CF, CR) is less than the threshold.

Description

TECHNICAL AREA

The present invention relates to a edging machine operable to form a edging portion with an opening portion having an oblique angle.

RELEVANT PRIOR ART

A binding piece is formed by forming two parallel seams on a binding patch and a main cloth, e.g Corner cuts are formed at respective end parts of the straight cut. In a general edging process, stitch formation start positions and stitch formation end positions of the two seams are respectively aligned in a direction perpendicular to the seams, and each of the corner cuts is formed so that the ends of the V-shaped corner cuts coincide with aligned ends of the seams, so that a rectangular opening part is formed becomes.

In some cases, however, the stitching ends of the two seams are shifted from each other in a direction along which the seams are formed to form an opening part with an oblique angle, e.g., an opening part in the shape of an oblique parallelogram.

Referring to such a hemming operation with an opening part having an oblique angle is disclosed JP 2000 - 107 473 A a technique in which a pair of corner knives serving as a V-shaped corner knife are shifted from each other by a length equal to a shift length between the stitch-forming ends of the two seams (which may also be referred to as a "deviation" hereinafter) .

JP H01- 38 519 B2 discloses a edging machine having a plurality of corner knives corresponding to a plurality of opening parts with different oblique angles. In this edging machine, an appropriate corner knife is selected from the plurality of corner knives in accordance with a deviation, i.e., in accordance with an oblique angle of an opening part to be formed.

Problems in a binding machine such as those in the JP 2000 - 107 473 A are described with reference to 31A and 31B described. In the figures, TL, TR denote seams, S denotes a straight incision, 201 and 202 denote corner knife parts, and C denotes a shifted length between the ends of both seams on one side in a direction along which the seams are formed, ie, deviation.

In a case where a corner cut is formed with the allowance C and the allowance C is set large, e.g., 4 mm or more, a distance C' from an end of the straight cut S to a base end of the inner corner knife becomes 202 also large.

In such a case, when the corner knife 202 tries to penetrate through the main cloth, the main cloth is likely to be lifted up in a direction in which the corner knife 202 moves. Thus, there is a problem that the main cloth cannot be cut to have a desirable cut length. A double-dash line R in 31B shows a section of an ideal corner cut.

As for the edging machine described in JP H01-38519B2, a deviation to be dealt with is limited by the corner knives preinstalled in the edging machine. Thus, there is a problem that the edging machine lacks versatility. Although it can deal with any deviations by manually adjusting the angles of the corner knives, such an adjustment work is very complicated and troublesome.

From the DE 42 24 033 C2 a sewing machine is known. the DE 198 45 624 C1 , the DE 199 08 894 C1 and the DE 198 45 623 C1 disclose sewing equipment for making a piped pocket opening. A sewing device for producing piped openings, in particular pocket slits in outerwear, is in DE 21 30 642 A described. A binding machine is from the DE 10 2006 050 019 A1 known.

SUMMARY OF THE INVENTION

It is an object of the present invention to provide means for easily and reliably forming a corner cut of good quality while dealing with a change in deviation.

This object is achieved according to the invention by a edging machine according to claim 1.

Further preferred embodiments are defined in the subclaims.

• zwei getrennt voneinander angeordnete Nadeln (41), um zwei parallele, geradlinige Nähte (TL, TR) auf einem Hauptnähgut (M) und einem Einfassfleck (B) auszubilden;
• einen Nadelvertikalbewegungsmechanismus (40), der betriebsfähig ist, um die beiden Nadeln (41) in einer vertikalen Richtung (Z) zu bewegen;
• einen Nähgutvorschubmechanismus (20), der betriebsfähig ist, um das Hauptnähgut (M) und den Einfassfleck (B) zu halten und in einer Nähgutvorschubrichtung (F) vorzuschieben;
• einen Bewegungsmessermechanismus (50), der betriebsfähig ist, um einen geradlinigen Einschnitt (S) zwischen den beiden geradlinigen Nähten (TL, TR) auszubilden;
• ein Paar von Eckmessermechanismen (100A, 100B), die so angeordnet sind, dass sie jeweiligen Endteilen des geradlinigen Einschnitts (S) entsprechen, wobei jeder der Eckmessermechanismen (100A, 100B) betriebsfähig ist, um Eckeneinschnittteile (VFL, VFR, VRL, VRR) zwischen dem entsprechenden einen der Endteile des geradlinigen Einschnitts (S) und jedem der benachbarten Endteile der beiden geradlinigen Nähte (TL, TR) auszubilden; und
• Steuermittel (81) zum Steuern jedes der Mechanismen (40, 20, 50, 100A, 100B), um die beiden geradlinigen Nähte (TL, TR) derart auszubilden, dass Positionen der benachbarten Endteile der beiden geradlinigen Nähte (TL, TR) in der Nähgutvorschubrichtung (F) voneinander verschieden sind, und um die Eckeneinschnittteile (VFL, VFR, VRL, VRR) ausgehend von den jeweiligen Endteilen der beiden geradlinigen Nähte (TL, TR) zu dem geradlinigen Einschnitt (S) hin schräg verlaufend auszubilden.

According to a first aspect of the invention, a binding machine (10) comprises:

• two needles (41) arranged separately from each other to form two parallel straight seams (TL, TR) on a main fabric (M) and a binding patch (B);
• a needle vertical movement mechanism (40) operable to move the two needles (41) in a vertical direction (Z);
• a cloth feeding mechanism (20) operable to hold and feed the main cloth (M) and the binding patch (B) in a cloth feeding direction (F);
• a movement knife mechanism (50) operable to form a linear incision (S) between the two linear seams (TL, TR);
• a pair of corner knife mechanisms (100A, 100B) arranged to correspond to respective end parts of the straight cut (S), each of the corner knife mechanisms (100A, 100B) being operable to cut corner cut parts (VFL, VFR, VRL, VRR) to form between the corresponding one of the end parts of the straight incision (S) and each of the adjacent end parts of the two straight seams (TL, TR); and
• Control means (81) for controlling each of the mechanisms (40, 20, 50, 100A, 100B) to form the two straight seams (TL, TR) such that positions of the adjacent end parts of the two straight seams (TL, TR) in the Workpiece feeding directions (F) are different from each other, and to form the corner cut parts (VFL, VFR, VRL, VRR) slantingly from the respective end parts of the two straight seams (TL, TR) toward the straight cut (S).

• eine Mehrzahl von Eckmessern (101, 102, 103, 104), die betriebsfähig sind, um die Eckeneinschnittteile (VFL, VFR, VRL, VRR) an jeweiligen Seiten der geradlinigen Naht (S) mit unterschiedlichen Einschnittlängen auszubilden;
• einen Auswahlmechanismus (120, 220), der betriebsfähig ist, um aus der Mehrzahl von Eckmessern (101, 102, 103, 104) ein Paar von Eckmessern für die jeweiligen Seiten des geradlinigen Einschnitts (S) auszuwählen; und
• einen Vertikalbewegungsmechanismus (130), der betriebsfähig ist, um das ausgewählte Paar von Eckmessern in der vertikalen Richtung (Z) zu bewegen.

Each of the pair of corner mechanisms (100A, 100B) includes:

• a plurality of corner knives (101, 102, 103, 104) operable to form the corner cut parts (VFL, VFR, VRL, VRR) on respective sides of the straight line seam (S) with different cut lengths;
• a selection mechanism (120, 220) operable to select from the plurality of corner knives (101, 102, 103, 104) a pair of corner knives for the respective sides of the straight incision (S); and
• a vertical movement mechanism (130) operable to move the selected pair of corner knives in the vertical (Z) direction.

• Abweichungseinstellmittel (85) zum Einstellen einer Information betreffend eine Abweichung (CF, CR) zwischen den benachbarten Endteilen der beiden geradlinigen Nähte (TL, TR) in der Nähgutvorschubrichtung (F);
• Abweichungsentscheidungsmittel (81) zum Entscheiden, basierend auf der Information betreffend die Abweichung, ob die Abweichung (CF, CR) einen Schwellenwert übersteigt oder nicht; und
• Eckeneinschnittteil-Innen/Außen-Entscheidungsmittel (81) zum Entscheiden, ob jeder der Eckeneinschnittteile (VFL, VFR, VRL, VRR), die ausgehend von jedem der benachbarten Endteile der geradlinigen Nähte (TL, TR) zum geradlinigen Einschnitt (S) hin auszubilden sind, mit Bezug auf eine Mitte des geradlinigen Einschnitts (S) in der Nähgutvorschubrichtung (F) auf einer inneren Seite oder einer äußeren Seite liegt.

The edging machine (10) also includes:

• Deviation setting means (85) for setting information concerning a deviation (CF, CR) between the adjacent end parts of the two straight line seams (TL, TR) in the work feed direction (F);
• deviation decision means (81) for deciding, based on the information regarding the deviation, whether or not the deviation (CF, CR) exceeds a threshold value; and
• corner cut part inside/outside judging means (81) for judging whether each of the corner cut parts (VFL, VFR, VRL, VRR) formed from each of the adjacent end parts of the straight seams (TL, TR) toward the straight cut (S). are located on an inner side or an outer side with respect to a center of the straight incision (S) in the work feed direction (F).

The control means (81) are operable to
to control the work feed mechanism (20) and the corner knife mechanisms (100A, 100B) such that when the deviation decision center (81) decides that the deviation (CF, CR) is smaller than the threshold value, each of the inside corner cut parts is formed at a position which is shifted from the position of the corresponding one of the outer corner cut parts in the work feed direction (F) by the deviation (CF, CR), and
to control the selection mechanism (120, 220) such that when the deviation decision means (81) decides that the deviation (CF, CR) is larger than the threshold value, the corner knives (102, 104) with longer incision lengths for the respective outer ones Corner cutting parts are selected as compared with a case where the deviation (CF, CR) is smaller than the threshold.

• Abstandseingabemittel (85) zum Eingeben eines Abstands zwischen einem Endteil jedes der Eckeneinschnittteile (VFL, VFR, VRL, VRR) auf einer Seite einer entsprechenden der geradlinigen Nähte (TL, TR) und einer entsprechenden der geradlinigen Nähte (TL, TR) in einer Richtung (Y) senkrecht zur Nähgutvorschubrichtung (F).

According to a second aspect of the invention, the edging machine (10) further comprises:

• Distance input means (85) for inputting a distance between an end part of each of the corner cut parts (VFL, VFR, VRL, VRR) on a side of a corresponding one of the straight line seams (TL, TR) and a corresponding one of the straight line seams (TL, TR) in one direction (Y) perpendicular to the sewing material feed direction (F).

The selection mechanism (120, 220) includes a positioning motor (121, 221) that drives each of the corner knives (101, 102, 103, 104) in the direction (Y) perpendicular to the sewing material feed direction (F).

The control means (81) is further operable to control the positioning motor (121, 221) such that with respect to the corner knife (101, 102, 103, 104) moved in the vertical direction (Z) by the vertical movement mechanism (130) is to be moved, a distance between an end part of the corner knife (101, 102, 103, 104) on a side of the straight cut (S) and the straight cut (S) in the direction (Y) to the work feeding direction (F) equal to the distance which is set by the distance input means (85).

• ein Bewegungsmesser (51), das oberhalb einer Vorschubbahn des Hauptnähguts (M) und des Einfassflecks (B) so gehalten ist, dass es in der vertikalen Richtung (Z) beweglich ist; und
• einen Messermotor (57), der das Bewegungsmesser (51) in der vertikalen Richtung (Z) bewegt.

According to a third aspect of the invention, the movement mechanism (50) comprises:

• a movement meter (51) held above a feed path of the main cloth (M) and the binding patch (B) so as to be movable in the vertical direction (Z); and
• a knife motor (57) which moves the movement knife (51) in the vertical direction (Z).

The control means (81) is also operable to control the knife motor (57) and the work feed mechanism (20) in such a way that the rectilinear incision (S) starts from an end part of one of the outer corner incision parts on one side of the rectilinear incision (S). an end part of the other of the outer corner sipe parts on one side of the straight sipe (S).

According to a fourth aspect of the invention, the selection mechanism (220) includes a slider crank mechanism operable to convert rotational force into linear reciprocating motion for selecting the corner knives (101, 102, 103, 104).

According to a fifth aspect of the invention, the selection mechanism (220) positions the respective corner knives (101, 102, 103, 104) at a plurality of positions within a reciprocating range of linear reciprocating movement to select the respective corner knives (101 , 102, 103, 104). The plurality of positions include respective ends of the reciprocating range.

The “deviation” means a distance (CF, CR) between the end part of the straight-line seam going to the outer side and the end part of the other straight-line seam on the inner side on each of the sides of the binding part in the material feeding direction (see 2 ). The "information regarding deviation" is necessary to provide the deviation in sewing, and may be information directly indicating a length of deviation and which of the ends of both seams on the outer side is adjusted, or it may be indirect information from which the length of deviation and which of the ends of the two seams on the outer side is adjusted can be obtained.

In the description, a part closer to the center of the straight slit in the work feeding direction is referred to as the "inner side" or the "inside", and a part farther from the center of the straight slit in the work feeding direction is referred to as the " outer side" or the "outside". Furthermore, the corner cut part decided to be positioned on the outside is referred to as the outside corner cut, and the corner cut part decided to be positioned on the inside is referred to as the inside corner cut part.

In general, in the hemming process, the straight line cut is formed between a base part (an end part on the side of the straight line cut) of the outside corner cut part on one side in a sewing direction and a base part of the outside corner cut part on the other side in the sewing direction. In a strict sense, the straight cut is formed so as to extend from the base part to the outer side in some cases. However, such a running part of the straight cut is slight.

In a edging process, when the corner cut is formed with a deviation between the outer corner cut part and the inner corner cut part to form an opening part with an oblique shape, a cut error, i.e., insufficient cutting with respect to the inner corner cut part, is likely to occur as the deviation becomes larger becomes. This is due to the fact that as the deviation increases, a length of a part of the straight cut on the outside of the base part of the inner corner cut part increases. In other words, if the length of the part of the straight line cut on the outside of the base part of the inside corner cut part is reduced, the work piece is less likely to be lifted up after the penetration of the corner knife for forming the inside corner cut part, so that a proper cutting operation can be performed.

According to the first aspect of the invention, when the deviation is large, the outer corner cutting part is made longer in cutting length by the corner knife. Therefore, it is possible to place the respective end parts of the straight line cut more on the inner side. As a result, it is possible to make the length of the part of the straight line cut on the outer side of the inner corner cut part, that is, a length from the base part of the inner corner cut part toward a base part of the outer corner cut part, smaller. As a result, the corner cut can be made to approach an ideal V-shaped cut. Furthermore, after the penetration of the corner knife for forming the inner corner cut part, the work is less likely to be lifted, and it becomes possible to perform proper cutting.

Although a displacement in the work feed direction is caused between the base parts of the pair of corner cutting parts when the deviation is provided, the cutting operation of the corner knife on the inner side can be performed appropriately. There is no such disadvantage that a hemming work with an opening part having an oblique angle can be performed only when a deviation corresponds to a limited combination of corner knives where base parts of the mutual corner cut parts to be formed are not in the work feed direction are shifted from each other as in the conventional technique. Namely, any deviations can be adjusted so that the versatility can be improved.

The length of the straight line incision may be input and adjusted before a sewing operation by providing setting means, or it may be calculated by the control means in accordance with the incision length of the corner knives.

According to the second aspect of the invention, the positioning motor is provided to move each of the corner knives in the direction perpendicular to the work feeding direction. Therefore, it is possible to perform alignment such that a distance in the direction perpendicular to the work feeding direction between one of the end parts (the base part) of the corner knife on the inner side of the straight line cut and the straight line cut is equal to the set distance. Thus, the base part of the corner incision part can be formed at an arbitrary set distance with respect to the straight incision in the direction perpendicular to the work feeding direction.

In the distance inputting means, the distance between one of the end parts of the corner cut part on the straight-line seam side and the straight-line seam in the direction perpendicular to the work feed direction is input. However, it is apparent that a distance between the other end part of the corner cut part on the straight cut side and the straight cut in the direction perpendicular to the work feeding direction can be inputted.

According to the third aspect of the invention, it is controlled so that the linear cut is formed from the base part of one of the outer corner cut parts to the base part of the other of the outer corner cut parts. Therefore, for example, in a case where the control means selects the corner knife having a longer cutting length in accordance with the decision of the deviation deciding means, it is possible to perform the straight line incision from the base part of one of the corner incision parts toward that of the other corner incision part without changing the length of the adjust rectilinear incision again, train.

According to the fourth aspect of the invention, the selection mechanism includes a slider crank mechanism operable to convert rotary force into linear reciprocating motion for selecting the corner knives. As a result, the selection of the corner knives can be performed with a simple mechanism. It is therefore possible to improve productivity of an apparatus and reduce manufacturing cost.

According to the fifth aspect of the invention, the selection mechanism uses the slider crank mechanism. The torque at a constant speed is converted into a linear reciprocating motion, a speed of the linear reciprocating motion in the reciprocating direction changes in accordance with a sine curve. Therefore, at respective end parts of the reciprocating movement range, the speed is low and the change in speed is moderate. Accordingly, by adjusting a position where the corner knife is selected at the end parts of the reciprocating range, it is possible to obtain a smooth operation when the corner knife is selected in each of the positions. Therefore, it is possible to effectively suppress vibration, noise, and positioning error.

character list

• 1 Fig. 13 is a perspective view showing a schematic structure of an entire edging machine,
• 2 Fig. 13 is an explanatory view showing an arrangement relationship between a straight line incision formed by a center knife, an incision formed by a corner knife, and stitching made by two needles in a binding work for making a bag opening portion including a slant takes shape, are trained,
• 3 Fig. 14 is a perspective view showing a needle vertical movement mechanism.
• 4 Fig. 13 is a perspective view showing a cutting-enabled state of the needle vertical movement mechanism and a center knife mechanism;
• 5 Fig. 12 is a perspective view showing each corner knife mechanism,
• 6 Fig. 14 is an enlarged perspective view showing a state where each corner knife is provided.
• 7A Fig. 14 is an explanatory view showing the procedure for selecting the corner knife to move vertically.
• 7B Fig. 14 is an explanatory view showing an example of adjustment of each corner knife,
• 7C Fig. 13 is an explanatory view showing a state in which an up-down bracket is engaged with a cylinder bracket.
• 8th is a block diagram showing a control system including operation control means of the binding machine,
• 9 Fig. 14 is a table showing various setting items which are previously input to the operation control means through display input means to carry out a hemming operation,
• 10A until 10D are explanatory views showing how a dimension L is determined in cases where lengths of left and right straight line seams are different,
• 11 Fig. 12 is a view showing a display example of a setting input screen (1) displayed by the display input means.
• 12 Fig. 12 is a view showing a display example of a setting input screen (2) displayed by the display input means.
• 13 Fig. 12 is a view showing a display example of a setting input screen (3) displayed by the display input means.
• 14A Fig. 14 is an explanatory view showing a cutting start position of the center knife.
• 14B Fig. 14 is an explanatory view showing a cutting-in end position of the center knife.
• 15 Fig. 12 is a view showing a display example of a setting input screen (4) displayed by the display input means.
• 16 Fig. 12 is a view showing a display example of a setting input screen (5) displayed by the display input means.
• 17 Fig. 13 is a flowchart showing an operation control of the binding process,
• 18 is a flowchart that follows the process of 17 follows, with the presentation of the operational control of the edging work process,
• 19 is a flowchart that follows the process of 18 follows, with the presentation of the operational control of the edging work process,
• 20 Fig. 14 is an explanatory view showing a positional relationship between the respective corner knife mechanisms when a corner cut is formed;
• 21 Fig. 13 is an explanatory view showing a positional relationship between the respective corner knife mechanisms when the corner cut is formed;
• 22 Fig. 13 is an explanatory view showing a positional relationship between the respective corner knife mechanisms when the corner cut is formed;
• 23 Fig. 14 is an explanatory view showing a positional relationship between the respective corner knife mechanisms when the corner cut is formed;
• 24 Fig. 13 is an explanatory view showing fine positioning adjustment of an index in the Y-axis direction.
• 25 Fig. 12 is a view for explaining advantages attainable by features of the invention.
• 26 Fig. 12 is a view for explaining further advantages that can be achieved by features of the invention.
• 27A until 27C are explanatory views showing a cutting operation of the corner knife after the position adjustments performed in order,
• 28 14 is an explanatory view showing an operation according to another example of an index movement mechanism, wherein 28A a state in a left-most position of the index, 28B a state in a middle position of the index and 28C show a state in a rightmost position of the index,
• 29 Fig. 14 is a perspective view showing an index movement mechanism using a slider crank mechanism instead of a ball screw mechanism.
• 30A until 30C 12 are views for explaining a positioning operation to be performed for three positioning positions to select respective corner knives, and
• 31 12 is a view for explaining problems of the prior art, illustrating a state of forming the corner cut, wherein 31A shows a state set before a nicking start, and 31B shows a state set immediately after the start of lancing.

DETAILED DESCRIPTION

(Description of the edging process performed by the edging machine)

Below, with reference to 1 until 30 a edging machine 10 according to an embodiment of the invention is described. 1 Fig. 12 is a perspective view of the entire edging machine 10. In the following description, directions are defined by X, Y, and Z axes shown in the drawings. A Z-axis direction is a direction along which a central knife 51 moves up and down and which is perpendicular to a work plane on which sewing is performed, an X-axis direction is a direction along which a work is fed and which is parallel to the work plane, and a Y-axis direction is a direction perpendicular to the X-axis direction and parallel to the work plane.

2 Fig. 14 is an explanatory view showing a border part on which a bag-opening part with an oblique angle is to be formed. In particular shows 2 a positional relationship between a straight cut S made by the center knife 51, corner cut parts VFL, VFR, VRL and VRR made by respective corner knives 101, 102, 103, 104, and stitching TL, TR made by two needles 41 be formed. As in 2 shown, in the following description, a front side in a material feed direction F is a discharge side of the material feed direction F, a rear side in the material feed direction F is an inlet side in the material feed direction F, a left side is a left side in the Y direction when viewed in the material feed direction F Axis direction, and a right side in the direction of view of the work feeding direction F is a right side in the Y-axis direction.

The edging machine 10 is operable to sew a edging patch B onto a main work M with the two parallel seams TL, TR formed by the two needles 41 which are spaced from each other, and is further operable to sew the straight line to form incision S along the work feeding direction F and V-shaped corner incisions at respective end parts of the linear incision S. Each of the V-shaped corner cuts consists of a pair of corner cut parts.

When a pocket-opening part with a slanting angle is formed in a binding process, one of the straight-line seams (e.g., the seam TL on the left side in 2 ) formed so as to extend toward the back side of the other straight-line seam in the work feed direction F. In the following description, a rear deviation CR denotes a shift amount from a rear end of the straight seam TR to a rear end of the straight seam TL in the work feed direction F, and a front deviation CF denotes a shift amount from a front end of the straight seam TR to a front side End of straight line seam TL in material feed direction F. The "deviation" (CF or CR) denotes a distance in material feed direction F at the front or back of the binding piece, from the end of the line line seam on an outside to the end of the other line line seam on an inside (please refer 2 ).

The corner cut part VFR is formed from the front end of the straight cut S toward the front end of the right side straight line seam TR, and the corner cut part VFL is formed from a position slightly rearward from the front end of the straight cut S to the front end of the left side straight line seam TL out trained. The corner cut part VRR is formed from a position slightly forward from the rear end of the straight cut S toward the rear end of the right side straight line seam TR, and the corner cut part VRL is formed from the rear end of the straight cut S to the rear end of the left side straight seam TL out trained.

It is apparent that the edging machine 10 is also operable to form an opening portion having no deviation at both front ends and rear ends, i.e., a rectangular opening portion having two straight seams which are not shifted from each other.

(overall structure of the edging machine)

The edging machine 10 includes: a sewing machine table 11 serving as a working base for a sewing operation, a sewing machine frame 12 placed on the sewing machine table 11, a clamp foot feed mechanism 20 (a work material feed mechanism) operable to feed a work material (the main work material M and the binding patch B) and to feed it in the direction F, a binding device 30 operable to press the binding patch B onto the main sewing material M from above, a needle vertical movement mechanism 40 (a seam forming mechanism) operable to perform stitch formation at respective sides of the straight incision S in the vicinity of a front side part of the edging device 30 in the cloth feed direction F, a central knife mechanism 50 (a movement knife mechanism) operable to move a central knife 51 (a movement knife) up and down at one in the cloth feed direction situated Vorde ter side of the needles 41 so as to form the straight cut S through the cloths B, M between and along the seams TL, TR, corner knife mechanisms 100A, 100B corresponding to the respective ends of the straight cut S so as to form V-shaped corner cuts, respectively, and operation control means 80 for controlling each of the parts described above.

Each of the parts is described in detail below.

(sewing machine table and sewing machine stand)

The sewing machine table 11 has an upper surface parallel to an X-Y plane and is used in a horizontal state. The top of the sewing machine table 11 is formed in a rectangular shape extending in the work feed direction F, i.e., in the X-axis direction. The clamp foot feeding mechanism 20 and the binding device 30 are arranged on the sewing machine table 11, while the corner knife mechanisms 100A, 100B are arranged under the sewing machine table 11.

The sewing machine table 11 is equipped with a needle plate 13 which is placed under the two needles 41. The throat plate 13 is provided with two needle holes corresponding to the respective needles 41, and horizontal shuttles (not shown) are arranged under the respective needle holes. A thread inserted through each of the needles 41 is caught by one of the corresponding horizontal shuttles under the needle plate 13 and entangled with a lower thread unwound from the horizontal shuttle, thereby forming the stitches.

The throat plate 13 is also designed with a slot through which the central knife 51 can be inserted. The slit is formed on a front side of the needle holes in the cloth feeding direction F and at the center of the needle holes in the Y-axis direction. A stationary knife (not shown) which cooperates with the central knife 51 to cut the cloths is arranged under the slit.

The sewing machine frame 12 includes: a bed portion 12a arranged on one side of the intermediate part of the sewing machine table 11 in the longitudinal direction thereof, a vertical column part 12b projecting upward from the bed portion 12a, and an arm part 12c extending in the Y-axis direction extends from an upper end of the vertical column part 12b. Most parts of the needle vertical movement mechanism 40 and the center knife mechanism 50 are housed in the arm portion 12c. The needles 41 and the center knife 51 are supported so as to extend downward from a lower end portion of the arm portion 12c at the front thereof.

(needle vertical movement mechanism)

3 Fig. 12 is a perspective view showing the needle vertical movement mechanism mus 40. The needle vertical movement mechanism 40 includes: the two needles 41 constituting a twin needle, two needle bars 42 each of which holds a corresponding needle 41 at its lower end, a holding frame 49 holding the needle bars 42 such that each needle bar 42 is vertically movable, a needle bar holder 44 holding both needle bars 42, a main shaft motor 45 serving as a drive source for vertically moving the needles 41, a main shaft 46 rotatable by the main shaft motor 45 (see 8th ), a rotary weight 47 fixedly coupled to one end of the main shaft 46 for rotary motion, and a connecting rod 48 having one end coupled to an eccentric position from a center of rotation of the rotary weight 47 and the other end coupled to the needle bar holder 44 .

The main shaft 46 is supported within the arm portion 12c so as to be rotatable about the Y-axis, and a full rotational force is applied thereto from the main shaft motor 45. As shown in FIG. When the main shaft 46 rotates, the rotary weight 47 also rotates, so that the end of the connecting rod 48 makes a circular motion around the main shaft 46 of the sewing machine. A Z-axis moving component of the circular motion of the end of the connecting rod 48 is transmitted to the needle bar holder 44 at the other end of the connecting rod 48, so that the needle bars 42 reciprocate in the vertical direction.

The needle bar holder 44 includes a latch mechanism (not shown) operable to toggle holding and releasing of each needle bar 41 . The holding frame 49 also includes, at its upper end portion, a holding mechanism (not shown) operable to switch holding and releasing of each needle bar 41 . Holding and releasing of each of the needle bars 41 can be switched by operating the latch mechanism and the holding mechanism from the outside. More in detail: A needle switching electromagnet 43 (see 8th ) is provided in close proximity to the support frame 41 to perform switching operations on each of the mechanisms.

In accordance with the operation performed by the needle switching electromagnet 43, both needle bars 41 can be held in the latch mechanism, or one of the needle bars 41 can be held in the latch mechanism while the other needle 41 is held in the holding mechanism.

It is therefore possible to switch a holding state of the needle bars 41 under vacant patterns at appropriate timing settings. When forming a binding piece with a slanting angle, formation of one of the left and right straight line seams TL, TR is started earlier than the other, and one of the left and right line seams TL, TR is finished so that it is earlier than the other is trained.

(central knife mechanism)

4 Fig. 14 is a perspective view showing the needle vertical movement mechanism 40 and the center mechanism 50 in an incision enabling state.

The central knife mechanism 50 includes: the central knife 51 for forming the straight cut S by moving it vertically, a stationary knife (not shown) fixed under the throat plate 13 to cut the sewing materials B, M in sliding contact with the central knife 51, a knife rod 52 holding the center knife 51 at its lower end and held inside the arm part 12c so as to be slidable in the Z-axis direction, a knife motor 57 (a stepping motor) for vertically moving the center knife 51, a plurality of links 59 for transmitting a vertical driving force to the blade bar 42 through an eccentric cam 58 eccentrically fixed to an output shaft 57b of the blade motor 57, an air cylinder 65 (an actuator) used as a driving source for switching the cutting-in enabling state (a lower position) and an incising restricting condition (an upper position) and a stopper 68 for stopping a piston protruding from the air cylinder 65 .

When the piston of the air cylinder 65 is retracted (a state of 4 ), the center mechanism 50 is in the cutting-in enabling state in which the rotational force of the blade motor 57 is converted into vertical reciprocating motion, and the vertical reciprocating motion is transmitted to the center blade 51. When the piston of the air cylinder 65 protrudes (not shown), the center knife mechanism 50 is in the cutting restricting state in which the rotating force of the knife motor 57 is not transmitted to the center knife 51 .

When the cutter motor 57 rotates while the piston of the air cylinder 65 is retracted, the cutter bar 52 and the center cutter 51 are driven by the output shaft 57b extending in the Y-axis direction, the eccentric cam 58 fixed to the output shaft 57b and the links 59 move vertically, thereby performing a cutting operation.

On the other hand, when the piston of the air cylinder 65 protrudes, the links 59 are arranged so that the power of the cutter motor 57 is not transmitted to the cutter bar 52, and the central cutter 51 is held to stand by above the throat plate 13.

Accordingly, the cutting-in permitting state and the cutting-in restricting state of the center knife 51 are switched by the driving operation of the air cylinder 65 .

(binding device)

The edging device 30 comprises: a bottom plate part 31, an upright plate part 32 extending upward from a top of the bottom plate part 31 in a longitudinal direction of the bottom plate part 31 so as to be perpendicular to the top of the bottom plate part 31, a guide part 33 extending at a front end of the upright plate part 32 in the workpiece feed direction F in order to guide the binding patch B so that it avoids the central knife 51, and a longitudinal guide (not shown) which guides the binding patch B in such a way that each of the broad side parts of the binding patch B is advanced along respective side faces of the upright plate portion 32 . The binding device 30 is held by a holding mechanism (not shown) with an air cylinder, and when not in use, is in a standby position remote from the area under the two needles 41 as shown in FIG 1 shown. When the binder 30 is used, the binder 30 is set at a position where the needle plate 13 is placed by a driving operation of the air cylinder.

The bottom plate part 31 has a rectangular shape and is held such that its longitudinal direction is parallel to the X-axis direction and such that an underside thereof is placed on a surface of the sewing machine table 11 when used. The bottom plate portion 31 is formed with U-shaped notches (not shown) at its front edge portion for the respective needle 41 to perform stitching therethrough.

The upright plate part 32 is plate-shaped except for a part around the guide member 33 . The upright plate portion 32 extends upward from the top of the bottom plate portion 31 . The upright plate part 32 extends along the longitudinal direction of the bottom plate part 31 at the center of the bottom plate part 31 with respect to the Y-axis direction. Accordingly, the bottom plate part 31 and the upright plate part 32, which are formed in an integral structure, have an inverted T-shape in cross section as viewed in the longitudinal direction of the bezel device 31.

When the edging patch B is laid over the main sewing material M and thus set over the throat plate 13, the edging device 30 is applied thereto from above. The broad side parts (i.e. the side parts on the right and left in 2 ) of the border patch B are folded back so as to face upward from respective sides of the bottom plate part 31, and are held by clamp legs 21 such that the broad side parts extend along the side faces of the upright plate part 32. In other words, the binding patch B is wound around the binding jig, going from one of the side surfaces of the upright plate part 32 to the other side surface 32 through an underside of the bottom plate part 31. In this state in which the binding patch B is set and around the binding jig 30 is wound around, the binding patch B and the main cloth M are fed and at the same time the needles 41 stitch on respective sides of the upright plate part 32 and the center knife 51 moves in the vertical direction to form the straight cut S.

The guide member 33 is arranged at the front side part of the edging device 30 in the work feeding direction F to prevent the edging patch B from being cut by the central knife 51 . The guide member 33 is forked toward the work feed direction F so that it has a V-shape when viewed from above. Due to this shape, the widthwise parts of the edging patch B are guided in a direction separated from the upright plate part 32 so that they are kept away from the center knife 51 .

(clamp foot feed mechanism)

The clamp foot feed mechanism 20 includes: the clamp foot 21 operable to press the main sewing material from above on respective sides of the edging patch B set around the edging jig 30, a holding member 22 holding the clamp foot 21, an air cylinder (not shown) for vertically moving the clamp foot 51 via the support member 22, folding plates (not shown) provided on the respective clamp feet 21 to move the broadside side parts of the border patch B over a top of the bottom plate part 31 by reciprocally moving toward each other to fold over, and a presser motor 23 (see 8th ) (feed drive means) for moving the binding patch B and the main sewing material M, which are held by the clamp feet 21, in the sewing material feed direction F by the holding member 22.

The clamp feet 21 are each rectangular plates and are held on the holding member 22 with their longitudinal directions parallel to the X-axis direction. The clamp feet 21 are held such that their plate faces are parallel to the X-Y plane. The clamp feet can be adjusted at an up position or at a down position by driving the air cylinder. When the clamp feet 21 are in the up position, they are separated from the top of the sewing machine table 11, and when the clamp feet 21 are in the down position, they are level with the top of the sewing machine table 11. The two clamp feet 21 are separated from each other in the Y-axis direction so that at least the upright plate portion 32 of the binder 30 can be inserted therebetween.

The holding member 22 is held on the sewing machine table 11 so as to be movable in the X-axis direction, and is arranged such that the two clamp butts 21 move on an outside of a vertical movement path of the two needles 41 . The holding member 22 is driven by the presser motor 23 through a ball screw mechanism (not shown).

(corner knife mechanism)

5 Fig. 12 is a diagrammatic view of the corner knife mechanisms 100A, 100B, 6 12 is an enlarged perspective view showing a state in which corner knives 101 to 104 are provided, and 7A 14 is an explanatory view showing an operation for selecting the corner knives 101 to 104 to be moved in the vertical direction. 5 12 shows a state in which two of the corner knives 101 to 104 are removed from each of the corner knife mechanisms 100A, 100B.

The two corner knife mechanisms 100A, 100B are arranged under the sewing machine table 11 along a movement path of the clamping feet 21 and in the sewing material feed direction F on the front side of the central knife 51. A pair of corner knives pierces the edging patch B and the main work material M supplied by the clamp foot feed mechanism 20 from below, thereby forming the V-shaped corner cut at each of the ends of the straight cut S.

The corner knife mechanisms 100A, 100B are arranged along the work feed direction F. As shown in FIG. The corner knife mechanism 100A is arranged on the rear side of the corner mechanism 100B in the work feed direction F. In other words, the corner knife mechanism 100A forms the corner incision on the rear side of the straight incision S, and the corner cutting mechanism 100B forms the corner incision on the front side of the straight incision S. The corner knife mechanism 100B is moved in the work feed direction F by a unit movement motor 90 (see 8th ) movable so that the corner knife mechanism 100B can be positioned with respect to the table 11. In the flow charts shown in the figures, to distinguish the two corner knife mechanisms 100A, 100B, parts of the corner knife mechanism 100A may be referred to as a "fixed side" and parts of the corner knife mechanism 100B may be referred to as a "movable side".

Since the configurations of the corner knife mechanisms 100A, 100B are substantially mirror symmetrical to each other with respect to an intermediate Y-Z plane, the details will only be given for the corner knife mechanism 100B. Parts of the corner knife mechanism 100A that are mirror-symmetrical to those of the corner knife mechanism 100B will have the same reference numerals and their description will be omitted.

The corner knife mechanism 100B comprises: four corner knives 101, 102, 103, 104, a unit body 105 supported on a pair of guide shafts 14 each having the shape of a round bar and arranged under the table 11, an index 106 with a block-shaped structure to hold each of the corner knives 101 to 104 and held on the inside of a concave part 105a formed on a rear surface of the unit body 105 so as to be movable in the Y-axis direction, an index moving mechanism 120 (a corner knife selection mechanism) operable to move the index 106 in the Y-axis direction and to position the index 106, and a vertical movement mechanism 130 operable in cooperation with the index movement mechanism 120 to selectively open and close the corner knives move away

The unit body 105 has the shape of a frame and is supported by the pair of guide shafts 14 inserted through the unit body at one end in the Y-axis direction. The concave part 105a is formed on a rear surface of the unit body 105, and the index 106 is inside the concave part 105a arranged. Although the unit body 105 of the corner knife mechanism 100A is held stationary, the unit body 105 of the corner knife mechanism 100B can be placed at an arbitrary position in the X-axis direction by the driving operation of the unit moving motor 90 using a belt feed mechanism (not shown) or a ball screw mechanism. The unit motion motor 90 may be a linear motor.

Two upper and lower support rods 106a are fixedly provided on the index 106 and extend from a side surface of the index 106 in the X-axis direction. The support rods 106a are inserted through respective insertion holes provided on the unit body 105 so that the index 106 is supported to be movable in the Y-axis direction with respect to the unit body 105. As shown in FIG.

Four corner knife fixing bases 107, 108, 109, 110 are arranged on a top of the index 106 to hold the respective corner knives 101 to 104 independently. The mounting bases 107 to 110 can be adjusted by loosening or tightening a mounting screw (not shown) to adjust an angle of each corner knife 101 to 104 around the Z-axis and to adjust an inclination angle at which a blade tip of each corner knife 101 to 104 pointing. For each corner knife 101 to 104, an angle at which the corner cutting part is to be formed with respect to the straight cutting S is determined by adjusting the angle around the Z-axis, and a length of the corner cutting part to be formed is determined by adjusting the inclination angle which the tip of the blade is pointing.

An example of an arrangement of the corner knives 101 to 104 seen from above is given with reference to FIG 7B described. Two corner knives 101, 102 on the right form the corner kerf parts on the right side of the straight kerf S, and they both face right from the front side direction. The corner knife 102 is inclined such that the length of the corner cutting part to be formed becomes longer than the corner knife 101 . Widths h1, h2 of the corner cutting parts to be formed by the respective corner knives are set to be equal to each other in the Y-axis direction.

Two corner knives 103, 104 on the left form the corner knife parts on the left of the straight sipe S, and they are both twisted to the left from the front side direction. The corner knife 104 is inclined such that the length of the corner cutting part to be formed is longer than the corner knife 103. Widths h1, h2 of the corner cutting parts to be formed with the respective corner knives 103, 104 are set to be equal to each other in the Y-axis direction are.

Each of the attachment bases 107 to 110 has a slide axis (not shown) extending downward in the Z-axis direction. The slide axis is slidable with respect to the index 106, so that each of the attachment base bodies 107 to 110 is held to be movable in the vertical direction with respect to the index 106. Up-down brackets 107a to 110a (engaging projections) protruding toward the front are formed at lower end parts of the respective slide shafts. Each of the up-down panels 107a to 110a extends toward the front of a front face of the index 106. As shown in FIG. The vertical moving mechanism 130 moves the corner knives 101 to 104 via the up-down brackets 107a to 110a.

The index moving mechanism 120 includes: an index motor 121 (a positioning motor) which is stationarily provided above the unit body 105, a screw rod 122 which is rotatable by the index motor 121, and a moving member 123 which is coupled to the screw rod 122 via a ball screw .

The screw shaft 122 is rotatably supported on the top of the unit body 105 along the Y-axis direction and has one end coupled to an output shaft of the index motor 121 via a clutch.

The moving link 123 is supported by an arm portion 106b extending from an end portion of the index 106. As shown in FIG. Therefore, when the screw rod 122 is rotated by the index motor 121, the moving member 123 receives a moving force in the longitudinal direction of the screw rod 122, i.e., in the Y-axis direction, through the ball screw mechanism, so that the index 106 is moved in the Y-axis direction .

The index 106 is moved in the Y-axis direction by the index moving mechanism 120 when the pair of corner knives to be vertically moved by the vertical moving mechanism 130 is selected from the corner knives 101 to 104, and also moved when a position is set where the corner cutting parts are to be formed by the selected corner knives in the Y-axis direction.

The vertical moving mechanism 130 includes: a first air cylinder 131 for moving the corner knife up to the forming a corner cut on the right side of the straight cut S, a second air cylinder 132 for moving up the corner knife to form the corner cut part on the left side of the straight cut S, and cylinder brackets 133, 134 mounted on respective output axes of the air cylinders 131, 132 are provided. Each of the cylinder brackets 133, 134 is selectively engageable with one of the up-down brackets 107a through 110a.

The air cylinders 131, 132 are provided on the unit body 105 such that their operating directions are parallel with the Z-axis direction.

Each cylinder bracket 133, 134 has the shape of a hand drum. More specifically, each cylinder bracket 133, 134 has a pair of flanges and a smaller diameter intermediate portion therebetween. The cylinder brackets 133, 134 are arranged on the output axes of a corresponding one of the air cylinders 131, 132 such that their axial center lines are along the Z-axis direction. The air cylinders 131, 132 and the cylinder brackets 133, 134 are positioned with respect to the unit body 105 such that when the index 106 is moved in the Y-axis direction, front end parts of the up-down brackets 107a to 110a are between the flanges of the cylinder brackets 133, 134 pass through.

More specifically, when the index 106 is moved in the Y-axis direction, the up-down brackets 107a to 110a pass through the flanges of the respective cylinder brackets 133, 134 in a certain order. The index motor 121 of the index moving mechanism 120 is controlled so that the up-down console corresponding to the corner knife to be operated is stopped between the flanges of one of the cylinder consoles 133, 134 so that the up-down console is aligned with the cylinder console in Can engage, whereby the corner knife to be actuated by driving one of the first or the second air cylinder 131, 132 can be moved up and down.

An optical index sensor 111 (see 8th ) is arranged at a bottom of the unit body 105 . The optical index sensor 111 is operable to detect four positions of the index 106, namely (1) a position in which the up-down bracket 107a of the corner knife 101 is engageable with the cylinder bracket 133, (2) a position in which the up-down bracket 108a of the inside knife 102 is engageable with the cylinder bracket 133, (3) a position in which the up-down bracket 109a of the corner knife 103 is engageable with the cylinder bracket 134, and ( 4) a position in which the up-down bracket 110a of the corner knife 104 is engageable with the cylinder bracket 134. The position of the index 106 is controlled by the optical index sensor 111 in accordance with these detections. In the following description, a position of each of the corner knives 101 to 104 corresponding to the respective positions (1) to (4) of the index 106 is referred to as an operable position.

As in 7C 1, an area where each of the cylinder brackets 133, 134 and a corresponding one of the up-down brackets 107a to 110a overlap each other has a certain width in the Y direction. Therefore, an engaged state of one of the corresponding up-down brackets 107a to 110a can be maintained even if a corresponding one of the up-down brackets 107a to 110a is slightly shifted in the Y direction with respect to the cylinder brackets 133,134. Thus, a cutting position of each corner knife 101 to 104 in the Y direction is adjustable within the range in which the engaged state can be maintained.

(control system of edging machine)

8th Fig. 12 is a block diagram showing a control system including the operation control means 80 of the binding machine 10.

Display input means 85 for displaying character and image information and inputting various settings, and a start switch 87 for inputting a sewing start instruction are coupled to the operation control means 80 via an input/output circuit (not shown). Furthermore, an encoder 88 for detecting the number of rotations of the main shaft motor 45 is coupled to the operation control means 80 via an input circuit 88a, so that a rotation angle of the main shaft motor 45 can be detected from a predetermined origin and a rotation speed of the main shaft motor 45.

The main shaft motor 45, the presser motor 23, the knife motor 57, the unit movement motor 90 and the index motor 121 are coupled to the operation control means 80 via respective drivers 45a, 23a, 57a, 90a, 121a and are controlled by the operation control means 80.

Furthermore, an electromagnetic valve (not shown) operable to drive the air cylinder to move the binding device 30 in the vertical direction and another (not shown) electromagnetic valve operable to drive the air cylinder to move the clamping feet 21 in the vertical direction are connected to the operation control means 80 via respective drivers. Similarly, an electromagnetic valve 70 of the air cylinder ders 65 for switching an operative state and an inoperative state of the center knife 51, electromagnetic valves 135, 136 of the first and second air cylinders 131, 132 for moving the corner knives in the vertical direction, and an electromagnetic valve 89 operable to switch a (not shown) Knife drive cylinder for driving a thread trimming knife connected via respective drivers 70a, 135a, 136a, 89a.

Furthermore, the index sensor 111 is coupled to the operation control means 80 via an input circuit 111a.

Furthermore, the needle switching electromagnet 43 is connected to the operation control means 80 via a driver 43a.

Although there are two corner knife mechanisms, shows 8th only the configuration of one of the corner knife mechanisms and the configuration of the other corner knife mechanism is omitted.

The operation control means 80 includes: a CPU 81 operable to execute various processes and controls, a ROM 82 in which a setting input program for inputting the operation of various settings of the edging machine 10 and an operation control program for executing operation control of the edging machine 10 are stored , a RAM 83 serving as a work area for storing various data during the working process of the CPU 81, and an EEPROM 71 for storing sewing data and various setting data.

(Items to be set for the operation control of a edging operation)

9 is a table showing various items to be set. Each of the items is previously inputted from the display inputting means 85 to the operation control means 80 to carry out the binding work. A display control of the display input means 85 and a data input process during the setting operation are performed in accordance with the setting input program. Contents of the set items are stored as a series of sewing data in the EEPROM in accordance with the setting input program.

Each of the items to be set is described below.

“Adjustment of the dimension L” means adjusting the stitch formation length of the straight line stitching TL, TR.

In a case where the lengths of the left and right lineal seams TL, TR are equal to each other, the dimension L is the length of each of the lineal seams TL, TR. In cases where the lengths of the left and right lineal seams TL, TR are different from each other, as in 10A until 10D As shown, the operation control means 80 recognizes the dimension L as the length of the longer seam.

“Direction selection of a stitch formation start deviation” means a setting as to whether, in the front side part of the binding part, the right straight-line seam TR and the right corner cut part VFR should be shifted on the front side instead of the left straight-line seam TL and the left corner cut part VFL, whether the left straight-line seam TL and the left corner cut part VFR on the front side should be shifted instead of the right straight line seam TR and the right corner cut part VFL, or whether the front ends of the left and right seams TL, TR should be aligned with respect to a direction perpendicular to the work feed direction F. The "deviation" means a distance (CF or CR) in the work feeding direction F from the end of one of the straight-line seams on each of the front and back sides of the binding piece, extending toward an outer side to the end of the other straight-line seam on an inner side (please refer 2 ).

11 Fig. 12 shows a setting input screen (1) presented by the display input means 85. Figs. The “direction selection of a stitch formation start deviation” is inputted from selection buttons W1, W2.

“Stitch formation start deviation amount” denotes an adjustment of a shift amount in the work feed direction F in the front part of the binding part between the left and right straight line seams TL, TR, that is, a shift amount between the left and right corner cut parts VFL, VFR. The stitch formation start deviation amount is input from an increase/decrease button W3 in the setting input screen (1) shown in 11 is shown.

"Direction selection of a stitch formation end deviation" means a setting in the rear side part of the binding part as to whether to shift the right straight line stitching TR and the right corner cutting part VRR on the front side instead of the left straight line stitching TL and the left corner cutting part VRL, whether the left straight line Seam TL and left corner incision part VRL are to be moved to the front side instead of right straight line seam TR and right corner incision part VRR, or whether the front ends of the left and right seams TL, TR should be aligned with respect to a direction perpendicular to the work feed direction F. The direction selection of a stitch formation end deviation is input from selection buttons W4, W5 in the setting input screen (1) shown in 11 is shown.

“Stitch-forming end deviation amount” means setting a shift amount in the cloth feed direction in the back side part of the binding part between the left and right linear seams TL, TR, ie, a shift amount between the left and right corner cut parts VRL, VRR. The “stitch forming end deviation amount” is set by an increase/decrease button W6 in the setting input screen (1) shown in 11 is shown entered.

The items: "Direction selection of stitch pattern start deviation", "Stitch pattern start deviation amount", "Direction selection of stitch pattern end deviation" and "Stitch pattern end deviation amount" correspond to "Information regarding the deviations in the work feed direction of the ends of the two opposing straight-line seams with the straight-line incision being located therebetween". By setting and inputting them, the display inputting means 85 functions as “deviation setting means”.

“Stitch formation start setting left side width for corner knife” means setting of a distance in the Y-axis direction in the front part of the binding part from the left side straight line seam TL to the left end of the left side corner incision part VFL.

12 Fig. 12 shows a setting input screen (2) presented by the display input means 85. Figs. The "stitch formation start setting left side width for corner knife" is inputted from an increase/decrease button W7.

“Stitch formation start setting right-side width for corner knife” means setting, in the front side part of the edging portion, a distance in the Y-axis direction from the right-side linear seam TR to the right end of the right-side corner incision part VFR. The “stitch formation start setting right side width for corner knife” is set by an increase/decrease button W8 in the setting input screen (2) shown in 12 is shown entered.

The “stitch formation end setting left-side width for corner knife” means setting, on the back part of the edging part, a distance in the Y-axis direction from the left-side straight line seam TL to the left end of the left-side corner incision part.

13 12 shows a setting input screen (3) presented by the display input means 85. FIG. The "stitch formation end setting left side width for corner knife" is inputted from an increase/decrease button W9.

The “stitch formation end setting right-side width for corner knife” means setting a distance in the Y-axis direction from the right-side linear seam TR to the right-side end of the right-side corner incision part in the rear side part of the binding part. The “stitch formation end setting right side width for corner knife” is controlled by an increase/decrease button W10 in the setting input screen (3) shown in 13 is shown entered.

The display input means 85 from which "set stitch formation start left-side width for corner knife", "set stitch formation start right-side width for corner knife", "set stitch formation end left-side width for corner knife" and "set stitch formation end right-side width for corner knife" functions as a distance inputting means for entering a distance between an end part of each of the corner cut parts on a side of a corresponding one of the straight-line seams and a corresponding one of the straight-line seams in a direction perpendicular to the work feeding direction F.

“Setting the center knife operation position” is an item for setting a cutting start position and a cutting end position of the center knife.

As in 14A 1, the cutting start position of the center knife is set by inputting a distance on the front part of the edging patch from the end of the straight line seam on the outside to the end of the straight line incision in the work feed direction.

As in 14B 1, the cutting end position of the center knife is adjusted by inputting a distance in the back part of the binding piece, from the end of the straight line seam on the outside to the end of the straight line incision in the work feed direction.

Both the cutting start position and the cutting end position of the center knife can be inputted from increase/decrease buttons W11, W12 which are on an in 15 reproduced setting input screen (4).

The operation control means 80 of the edging machine 10 performs operation control to use the corner knives 101, 103 which have small cutting lengths in the normal state (when the deviation is equal to or smaller than a threshold value including a case where the deviation is zero) and around automatically select the corner knives 102, 104 that have large cutting lengths when the deviation is greater than the threshold. The base part of the outer corner incision part and the end of the straight incision are basically made to coincide with each other (they can exceptionally be set to be shifted from each other by a desired length in some cases). Therefore, when the corner knives 102, 104 have longer lengths than those selected in the normal case, the base part of the outer corner cutting part is not coincident with the position of the end of the straight cutting when the adjustment of the center knife operating position is carried out on the assumption that the normal corner knives 101, 103 can be used.

Therefore, in a case where the stitch formation start deviation amount and the stitch formation end deviation amount are adjusted after the cutting start position and the cutting end position of the center knife are set, the CPU 81 of the operation control means 80 refers to the values of the deviation amounts. When the deviation amount is equal to or smaller than the threshold value (for example, 4mm in the edging machine 10), the cutting start position and the cutting end position in the EEPROM 71 controlled by the increase/decrease buttons W11, W12 of the in 15 shown setting input screen (4) are maintained.

When the value of the deviation amount exceeds the threshold value, a value obtained by subtracting the corner cut length of the normal corner knives 101, 103 in the work feed direction from the corner cut length of the longer corner knives 102, 104 in the work feed direction (for example, 11 - 7 = 4 mm). is added to the cutting start position and the cutting end position in the EEPROM 71 set by the increase/decrease buttons W11, W12 of the in 15 shown setting input screen 4 are set to correct the cutting start position and the cutting end position. The corrected cutting start and cutting end positions are stored in the EEPROM 71.

Therefore, when the setting screen for “Setting the center knife operating position” is displayed again after execution of the correction, a setting input screen (5) shown in 16 is shown instead of the setting input screen (4) shown in FIG 15 is reproduced, presented. On the setting input screen (5), when 7 mm is set in the setting input screen (4), for example, the corrected value of 11 mm is displayed, and a balloon indicating that the correction is being performed is displayed.

In a case where the stitch formation start deviation amount and the stitch formation end deviation amount are set before the setting of the cutting start position and the cutting end position of the center knife operating position, it is decided whether or not the set deviation amount exceeds the threshold value when the center knife operating positions are set, and further the in 15 setting input screen (4) shown when the set deviation amount is equal to or smaller than the threshold value, and the in 16 The setting input screen (5) shown is displayed when the set deviation amount exceeds the threshold value. In a case where the setting input screen (4) of 15 1, a value equal to the cutting length of the normally used corner knives 101, 103 in the work feed direction (e.g. 7mm in the embodiment) is shown as an error value of the cutting start position and the cutting end position of the center knife. In a case where the setting input screen (5) as shown in 16 shown, a value equal to the cutting length of the corner long knife 102, 104 in the work feed direction (e.g., 11 mm in the embodiment) is presented as an error value of the cutting start position and the cutting end position of the center knife.

In addition to the items described above, the cutting lengths of the corner knives 101 to 104 in the work feed direction are input and set. In the embodiment, the cutting lengths of the shorter corner knives 101, 103 in the work feed direction are set so that they have an equal length D _S (e.g. 7 mm) in each of the corner knife mechanisms 100A, 100B, the cutting lengths of the longer corner knives 102, 104 in the work feed direction become are set to have an equal length D _L (e.g., 11 mm) in each of the corner knife mechanisms 100A, 100B.

(operation control of a edging operation)

17 until 19 are flowcharts showing a frame operation control, and 20 until 23 12 are explanatory views showing a positional relationship between the corner knife mechanisms 100A, 100B while the corner cuts are being formed. Although each of the 20 until 23 an arrangement of the corner While FIG. 1 shows the knife mechanisms 100A, 100B seen in front view, the binding patch B and the main cloth M are shown in plan view to clarify a corresponding relationship.

All the processes shown in the flowcharts are executed by the CPU 81 in accordance with the operation control program. The binding operation control is described below.

First of all, the CPU 81 reads the sewing data input and set from the display inputting means 85 (step S1).

Next, a stitch formation operation is started in accordance with the sewing data (step S2). More specifically, the clamp feet 21 are moved down to hold the main cloth M set on the table 11 near the needles 41 at a predetermined rear position, and move the main cloth M to another predetermined position. Then, the edging patch B is applied to the clamp feet 21, and the edging jig 30 holds the edging patch B from above. The folding plates attached to the respective clamp feet 21 are moved toward the binder 30 so that the respective side parts of the binder patch B are folded toward the surface side of the binder 30 .

The pinch feet 21 start moving forward by the driving operation of the presser motor 23 and feed the work material (that is, the main work material M and the binding patch B) toward the needles 41 .

Then, the CPU 81 starts the driving operation of the main shaft motor 45 and executes the operation control of the needle switching electromagnet 43 so that, in accordance with the setting of the "direction selection of the stitch formation start deviation", the two needles 41 start stitching at the same time, or one of the needles 41 starts the stitch formation. In addition, when the “stitch formation start deviation amount” is set, the needle switching electromagnet 43 performs the operation control such that the subsequent needle 41 also starts stitching at a timing when the cloth is fed by the stitch formation start deviation amount.

Then, the CPU 81 starts a vertical movement of the center knife 51 via the electromagnetic valve 70 to start the formation of the straight cut S at a position at the rear of the front end part of the outer seam TL (or TR) by the distance set in accordance with the “Setting the center knife operating position”. As described above, when the "stitch formation start deviation amount" is equal to or smaller than the threshold of 4 mm, the corner knife for forming the outside corner knife incision part VFL (or VFR) with a smaller incision length is selected. When the "stitch formation start deviation amount" exceeds 4 mm, the corner knife for forming the outer corner incision part with a longer incision length is selected. The linear incision S is started to be in accordance with the "setting of the center knife operating position" which is set to correspond to the "stitch formation start deviation amount".

The "outside" or "outside" means the seam that extends toward the front from the other seam in the front part of the sewing area, and means the seam that extends to the back than the other seam in the back part the sewing area.

The CPU 81 executes the operation control of the needle switching electromagnet 43 in accordance with the "dimension setting L", the "direction selection of the stitch formation start deviation" and the "stitch formation end deviation amount", and stops the driving operation of the main shaft motor 45 to complete the formation of the respective seams TL, TR break up.

The CPU 81 executes an operation control to stop the vertical movement of the center knife 51 via the electromagnetic valve 70 to finish the formation of the straight cut at a position on the front side of the front end part of the outside seam TL (or TR) by the distance, which is set in accordance with “Setting the Center Knife Operating Position”. As described above, when the “adjustment final deviation amount” is equal to or smaller than the threshold value of 4 mm, the corner knife for forming the outer corner incision part VRL (or VRR) having the smaller incision length is selected. When the “stitching end deviation amount” exceeds 4 mm, the corner knife for forming the outside corner incision part VRL (or VRR) having a longer incision length is selected. The formation of the straight cut S is finished in accordance with the "setting of the center knife operating position" which is set to correspond to the "stitching end deviation amount". At this time, the seams TL, TR and the straight cut S are completely formed.

While the seams TL, TR and the straight cut S are being formed, the CPU moves 81 to a central position in the Y-axis direction direction, the index 106 of the corner knife mechanism 100A fixed with respect to the work feed direction (step S3). When the index 106 is at the center position, the up-down brackets 107a, 109a of the inner corner knives 101, 103 are engaged with the cylinder brackets 133, 134, respectively.

While the seams TL, TR and the straight cut S are being formed, the CPU 81 further moves, to a center position in the Y-axis direction, the index 106 of the corner knife mechanism 100B movable in the cloth feed direction (step S4).

While the seams TL, TR and the straight cut S are being formed, the CPU 81 further controls the unit moving motor 90 to move the corner knife mechanism 100B forward in the work feed direction with respect to the corner knife mechanism 100A to position the corner knife mechanism 100B at a position , at which the corner cut part is first formed (step S5).

A method of calculating the moving distance of the corner knife mechanism 100B in the CPU 81 is described in detail with reference to FIG 20 and 21 described. 20 shows a state just after the seams are formed, and 21 12 shows a state in which the corner knife mechanism 100B is moved to the position where the corner cutting part is first formed.

worin das Stichbildestartabweichungsausmaß durch CF, das Stichbildeendabweichungsausmaß durch CR und die Einschneidelänge jedes des Eckmesser in der Nähgutvorschubrichtung durch D repräsentiert sind, und eine Gesamtlänge des Stichbildebereiches ist durch A repräsentiert.Both corner knife mechanisms 100A, 100B form the inside corner cutting parts earlier than the outside corner cutting parts. Accordingly, a moving distance Y1 of the corner knife mechanism 100B in step S5 is equal to a distance from the base part of the inside corner cutting part on the front side to that of the inside corner cutting part on the back side. The moving distance Y1 of the corner knife mechanism 100B can be obtained by the following equation (1): $$\text{<figure-callout id="1" label="Y" filenames="DE102008010353B4\_0012.png,DE102008010353B4\_0018.png" state="{{state}}">Y</figure-callout>}1=\text{A}-\text{CF}-\text{CR}-2\text{D}$$

wherein the stitch-forming start deviation amount is represented by CF, the stitch-forming end deviation amount is represented by CR, and the cutting length of each of the corner knives in the work feed direction is represented by D, and a total length of the stitch-forming area is represented by A.

The stitch formation area A is equal to the dimension L set in "Setting the Dimension L" (A = L) when both the front and back end parts of one of the straight line seams are on the inside (a case where a bag opening part has the shape has a bowl). When the front end part of one of the straight seams is on the inside and the rear end part of the other straight seam is on the inside (a case where the pocket opening has a parallelogram shape), the stitch formation area A becomes a length (A = L + CF or A = L + CR) obtained by adding the shorter deviation to the L dimension set in “L dimension setting” (the sewing length of the longer straight line seam). The CPU 81 obtains the value of A through the above calculation.

When the position of each corner knife mechanism 100A, 100B is determined and the straight line incision S and the seams TL, TR are completely formed (step S6), the CPU 81 feeds the sewing works B, M from an in 20 shown position to an in 21 position shown (i.e., a cutting position of the corner knife mechanism 100A) by driving the presser motor 23 (step S7).

Then, the CPU 81 decides whether or not the deviation needs to be provided on the back sides in accordance with the setting of the "stitch formation end deviation amount" (step S8).

When it is set that the deviation need not be provided, the CPU 81 reads the set value of "stitch formation end right side width adjustment for corner knife" to drive the index motor 121 of the corner knife mechanism 100A, and adjusts the position of the index 106 in the Y Axis direction in accordance with the set value (see 24 ). Then, the CPU 81 drives the first air cylinder 131 via the electromagnetic valve 135 to move the corner knife 101 upward, thereby forming the right corner cutting part on the back side (step S9).

Further, the CPU 81 reads the set value of “stitch formation end left side width adjustment for corner knife” to drive the index motor 121 of the corner knife mechanism 100a, and adjusts the position of the index 106 in the Y-axis direction in accordance with the set value. Then, the CPU 81 drives the second air cylinder 132 via the electromagnetic valve 135 to move the corner knife 103 upward, thereby forming the left corner cutting portion on the back side (step S10). After that, the process proceeds to step S14.

On the other hand, when the deviation is set to be provided, the CPU 81 decides which of the left and right seams is on the outside based on the setting of the "direction selection of stitch formation end deviation" (step S11). When the CPU 81 executes the process of step S11, the CPU 81 functions as "corner cut part inside/outside judging means for deciding whether each of the corner cut parts to be formed from each of the adjacent end parts of the straight seam toward the straight cut , on the inside or on the outside with respect to the center of the straight line incision in the direction of material feed”.

When the left corner cut part is to be provided on the outside, a cutting-in process for the right corner cut part is performed on the inside before the left corner cut part. More specifically, the CPU 81 reads the set value of “stitch formation end right-side width adjustment for corner knife” to drive the index motor 121 of the corner knife mechanism 100A, and adjusts the position of the index 106 in the Y-axis direction in accordance with the set value (please refer 24 ). Then, the CPU 81 drives the first air cylinder 131 via the electromagnetic valve 135 to move the corner knife 101 upward, thereby forming the right corner cutting part on the rear side (step S12). After that, the process proceeds to step S14.

When the right corner cut part is to be provided on the outer side, the cutting-in process for the left corner cut part on the inner side is performed before the right corner cut part. More specifically, the CPU 81 reads the set value of "stitch formation end left side width adjustment for corner knife" to drive the index motor 121 of the corner knife mechanism 100A, and adjusts the position of the index 106 in the Y-axis direction in accordance with the set value ( please refer 24 ). Then, the CPU 81 drives the second air cylinder 132 via the electromagnetic valve 135 to move the corner knife 103 up, thereby performing the left corner cutting part on the rear side (step S13). After that, the process proceeds to step S14.

When the CPU 81 executes the processes of steps S9, S10, S12 and S13, the CPU 81 functions as "control means operable to control the positioning motor (i.e., the index motor 121) such that with respect to the vertical movement mechanism 130 to be moved in the vertical direction, a distance between an end part of the corner knife on a straight cut side and the straight cut in the Y-axis direction becomes equal to the distance set by the distance adjusting means".

Subsequently, the CPU 81 decides whether or not to provide the deviation on the front side part in accordance with the setting of the "stitch formation start deviation amount" (step S14).

When it is set that the deviation should not be provided, the CPU 81 reads the set value of "stitch formation start setting right side width for corner knife" to drive the index motor 121 of the corner knife mechanism 100B, and sets the position of the index 106 in the Y-axis direction accordance with the set value (see 24 ). Then, the CPU 81 drives the first air cylinder 131 via the electromagnetic valve 135 to move the corner knife up, thereby forming the right corner cutting portion on the front side (step S15).

Further, the CPU 81 reads the set value of "stitch formation start adjustment left side width for corner knife" to drive the index motor 121 of the corner knife mechanism 100B, and adjusts the position of the index 106 in the Y-axis direction in accordance with the set value (see 24 ). Then, the CPU 81 drives the second air cylinder 132 via the electromagnetic valve 135 to move the corner knife 103 upward, thereby forming the left corner knife cut part on the front side (step S16). Thereafter, the process proceeds to step S20.

On the other hand, when it is set that the deviation should be provided, the CPU 81 decides which of the left and right seams should be provided on the outside based on the setting of "direction selection of stitch formation start deviation" (step S17). When the CPU 81 executes the process of step S17, the CPU 81 functions as "corner cut part inside/outside judging means to decide whether each of the corner cut parts formed from each of the adjacent end parts of the straight line seam toward the straight cut is to be located on the inside or on the outside with respect to the center of the straight line incision in the direction of material feed".

When the left corner cut part is to be provided on the outside, cutting for the right corner cut part is performed on the inside before the left corner cut part. More specifically, the CPU 81 reads the set value of "stitch formation start setting right side width for corner knife" to drive the index motor 121 of the corner knife mechanism 100B ben, and adjusts the position of the index 106 in the Y-axis direction in accordance with the set value (see 24 ), the first air cylinder 131 is driven via the electromagnetic valve 135 to move the corner knife 101 upward, thereby forming the right corner cutting part on the front side (step S18). After that, the process proceeds to step S20.

Furthermore, when the right corner cut is to be provided on the outside, the cutting process for the left corner cut part is performed on the inside before the right corner cut part. More specifically, the CPU 81 reads the set value of "stitch formation start adjustment left side width for corner knife" to drive the index motor 121 of the corner knife mechanism 100B, and adjusts the position of the index 106 in the Y-axis direction in accordance with the set value (see 24 ). Then, the CPU 81 drives the second air cylinder 132 via the electromagnetic valve 135 to move the corner knife 103 upward, thereby forming the left corner cutting part on the front side (step S19). After that, the process proceeds to step S20.

When the CPU 81 executes the processes of steps S15, S16, S18 and S19, the CPU 81 functions as "control means operable to control the positioning motor (i.e., the index motor 121) such that with respect to the vertical movement mechanism 130 to be moved in the vertical direction, a distance between an end part of the corner knife on a straight cut side and the straight cut in the Y-axis direction becomes equal to the distance set by the distance adjusting means".

In step S20, the CPU 81 again decides whether or not to provide the deviation on the back side part in accordance with the setting of the "stitch formation end deviation amount".

If it is set that the deviation should not be provided, the process proceeds to step S27.

When the deviation is set to be provided at the rear side part, it is judged whether or not the "stitching end deviation amount" is larger than the threshold value of 4 mm (step S21). When the CPU 81 executes the process of step S21, the CPU 81 functions as "deviation deciding means for deciding, based on the information regarding the deviation set by the deviation setting means, whether or not the deviation exceeds the threshold value".

When the "stitching end deviation amount" is equal to or smaller than 4 mm, the process proceeds to step S23. When the "stitching end deviation amount" is larger than 4mm, the CPU 81 drives the index 106 of the corner knife mechanism 100A in the Y-axis direction to bring the corner knife to an operative position with a larger cutting length (step S22). The corner knife 104 is selected when step S12 is performed, while the corner knife 102 is selected when step S13 is performed.

In step S23, the sewing materials M, T are fed by the presser motor 23 of the clamp foot feeding mechanism 20 as shown in FIG 22 shown to place the corner knife of the corner knife mechanism 100A in a position where the outer corner cut part is to be formed on the rear side part. When the shorter corner knife 101, 103 is to be used, a feed distance Y2 of the sewing works M, T is coincident with the stitch formation end deviation amount CR, that is, Y2=CR. If the longer corner knife 102, 104 is to be used, then Y2 = CR - (D _L - D _S ).

Then, the CPU 81 again decides which of the left and right seams is on the outer side based on the setting of the "direction setting of stitch formation end deviation" (step S24). When the CPU 81 executes the process of step S24, the CPU 81 functions as "corner cut part inner/outer side judging means for deciding which of the corner cut parts to be formed from each of the adjacent end parts of the straight seam toward the straight cut. is on the inner side or on the outer side with respect to the center of the straight line incision in the direction of material feed".

When the left corner cut part is to be provided on the outside, the cutting-in process for the left corner cut is carried out. More specifically, the CPU 81 reads the set value of "stitch formation end left-side width for corner knife" to drive the index motor 121 of the corner knife mechanism 100A, and adjusts the position of the index 106 in the Y-axis direction in accordance with the set value (see 24 ). Then, the CPU 81 drives the second air cylinder 132 via the electromagnetic valve 135 to move the corner knives 103, 104 upward, thereby forming the left corner cutting portion on the rear side (step S25). The process then proceeds to step S27).

When the right corner cut part is to be provided on the outer side, the cutting process for the right corner cut is performed. More specifically, the CPU 81 reads the set value of "stitch formation end setting right side width for corner knife" to drive the index motor 121 of the corner knife mechanism 100A, and adjusts the position of the index 106 in the Y-axis direction in accordance with the set value (see 24 ). Then, the CPU 81 drives the first air cylinder 131 via the electromagnetic valve 135 to move the corner knife 101 or 102 upward, thereby forming the right corner cutting portion on the rear side (step S26). After that, the process proceeds to step S27.

When the CPU 81 executes the processes of steps S25 and S26, the CPU 81 functions as "control means operable to control the positioning motor (i.e., the index motor 121) such that, with respect to that provided by the vertical movement mechanism 130 in FIG vertical direction, a distance between an end part of the corner knife on a side of the straight line cut and the straight line cut in the Y-axis direction becomes equal to the distance set by the distance inputting means".

In step S27, the CPU 81 again decides whether or not to provide the deviation on the face part in accordance with the setting of the "stitch formation start deviation amount".

If it is determined that the deviation should not be provided, the process proceeds to step S34.

When the deviation is set to be provided on the front side part, it is judged whether or not the “stitch formation start deviation amount” is larger than the threshold value of 4 mm (step S28). When the CPU 81 executes the process of step S28, the CPU 81 functions as "deviation deciding means for deciding, based on the information regarding the set deviation set by the deviation setting means, whether the deviation exceeds the threshold value or not".

If the "stitch formation start deviation amount" is equal to or smaller than 4 mm, the process proceeds to step S30. When the "stitch formation start deviation amount" is larger than 4mm, the CPU 81 drives the index 106 of the corner knife mechanism 100B in the Y-axis direction to bring the corner knife to an operative position with a larger cutting length (step S29). The corner knife 104 is selected when step S18 is performed, while the corner knife 102 is selected when step S19 is performed.

In step S30, the corner knife mechanism 100B is driven by the unit moving motor 90 as shown in FIG 22 12 is moved to place the corner knife of the corner knife mechanism 100B in a position where the outer corner cut part is formed on the front side part. When the short corner knife 101, 103 is used, a moving distance Y3 of the corner knife mechanism 100B is coincident with a distance obtained by adding the stitch formation start deviation amount CF to the feed amount Y2 of the work, that is, Y3=Y2+CF. When the long corner knife 102, 104 is used, Y3 = Y2 + CF (D _L - D _S ).

Subsequently, the CPU 81 decides which of the left and right seams should be provided on an outside, that is, which of the seams is longer, based on the setting of the "direction selection of sewing start deviation" (step S31). When the CPU 81 executes the process of step S31, the CPU 81 functions as "corner cut part inside/outside judging means for deciding whether each of the corner cut parts to be formed from each of the adjacent end parts of the straight line seam toward the straight cut , on the insides or on the outside with respect to the center of the straight line incision in the direction of material feed".

When the left corner cut part is to be provided on the outer side, the cutting process for the left corner cut is carried out. More specifically, the CPU 81 reads the set value of "stitch formation start setting left side width for corner knife" to drive the index motor 121 of the corner knife mechanism 100B, and adjusts the position of the index 106 in the Y-axis direction in accordance with the set value ( please refer 24 ). Then, the CPU 81 drives the second air cylinder 132 via the electromagnetic valve 132 to move the corner knife 103 or 104 upward, thereby forming the left corner cutting part on the front side (see 23 : Step S32). The process then proceeds to step S34.

When the right corner cut part is to be provided on the outer side, the cutting-in process for the right corner knife cut is carried out. More specifically, the CPU 81 reads the set value of "stitch formation setting right side width for corner knife" by the index motor 121 of the corner knife mechanism 100B to drive, and adjusts the position of the index 106 in the Y-axis direction in accordance with the set value (see 24 ). Then, the CPU 81 drives the first air cylinder 131 via the electromagnetic valve 136 to move the corner knife 101 or 102 upward, thereby forming the right corner cut part on the front side (see 23 : Step S33). The process then proceeds to step S34.

When the CPU 81 executes the processes of steps S32 and S33, the CPU 81 functions as "control means operable to control the position motor (i.e., the index motor 121) so that with respect to that of the vertical movement mechanism 130 in FIG vertical direction, a distance between an end part of the corner knife on a side of the straight line cut and the straight line cut in the Y-axis direction becomes equal to the distance set by the distance adjusting means".

In step S34, the index 106 of each corner knife mechanism 100A, 100B is returned to the center position and the corner knife mechanism 100B is moved to a home position.

Then, the clamp foot feed mechanism 20 moves the clamp foot 21, thereby completing the binding work (step S35).

(Advantageous Effects of the Binding Machine According to the Embodiment)

When the set amount of deviation is greater than the threshold value (4 mm in the embodiment), the operation control means 80 of the edging machine 10 selects the corner knife 102, 104 with a larger cutting length than that of the corner knife 101, 103 as the corner knife in accordance with the setting input program an outside is to be commonly used (the corner gauge to be used when the amount of deviation is equal to or less than the threshold). As a result, a set default value (an error value) of the “center knife operation position setting” that defines the incision length of the straight incision can be switched to a value corresponding to the corner knife with the larger incision length (e.g., 7 mm when using the normal corner knife). and 11 mm if the larger corner knife is used).

Thus, when sewing is performed after the settings are made in accordance with the setting program, the CPU 81 of the operation control means 80 functions as "control means operable to control the knife motor 57 and the work feed mechanism 20 so that the straight cut S is formed from an end part of one of the outer corner cut parts on a straight-line cut S side (i.e., the base part) to an end part of the other of the outer corner cut parts on the straight-line cut side (i.e., the base position)”.

As described above, when the set deviation amount exceeds the threshold value, the large corner knives 102, 104 are automatically set to be used for the outer corner knife in accordance with the setting/input program, and the corner knife incision parts are cut by the large corner knives 102, 104 is formed in accordance with the operation control program. Further, in accordance with the operation control program, the operation control is executed such that the straight line cutting S is made from the base part of the outer corner cutting part at one of the end parts of the sewing area to that of the outer corner cutting part at the other end part. As in 25 As a result, a kerf length Sn of the straight kerf formed by the center knife 51 can be adjusted between the base part of the corner kerf part VL on the outside and that of the corner kerf part VR on the inside to be smaller than a kerf length So in a case , in which the short corner knife is selected as the corner knife on the outside. As a result, it is possible to prevent the work from being lifted, which is caused when the cutting length of the straight line cutting described above is long while the corner knife on the inner side moves up. Thus, it is possible to resolve the cutting error and form an excellent and accurate corner cut.

Further, in accordance with the operation control program, the index motor 121 is controlled so that the distance from the base part of the corner knife to the straight line incision S becomes the value corresponding to the "stitch formation start setting right-side width for corner knife", "stitch formation start setting left-side width for corner knife". corresponds to "stitch formation end setting right side width for corner knife" or "stitch formation end setting left side width for corner knife" when forming the respective corner incision parts. In particular, when the deviation is adjusted and when the "width adjustment" is performed to avoid a separation from the straight cut S as in 26 shown, for the inside corner cutting part, it is possible to make insufficient cutting toward the straight seam compensate caused when the work is lifted while the corner knife on the inner side is moved up for the cutting-in operation. Thus, it is possible to form excellent and accurate corner cuts.

When the “width adjustment” of the corner knife is performed to cut off the straight cut S, a tip end part of the corner knife is positioned outside the straight cut as shown in FIG 27A shown. However, as in 27B and 27C As shown, a blade E reaches an end of a sewing material while the corner knife is being moved up, so that the cutting-in operation can be performed without any trouble.

(Additional)

In the edging machine 10, when the set value of the deviation is larger than the threshold value, the corner knife is switched to the corner knife with a longer cutting length. It is desirable that this threshold be determined by performing a test on the condition that the normal corner knives 101, 103 are used for both the left and right corner knives, thereby earlier obtaining a value of the deviation causing the cutting error which goes back to the lifting of the sewing material.

Further, although the "direction selection of the stitch formation start deviation" and the "stitch formation formation start deviation amount" are set in the separately set items, and the "direction selection of the stitch formation end deviation" and the "stitch formation end deviation amount" are set in the separately set items, it is also possible to set the "information regarding Deviation” can be set more easily by predetermining that, after setting the “stitch formation start deviation amount” and the “stitch formation end deviation amount”, for example, a numerical value of “+” denotes the deviation in a case where the end part of one of the straight line stitching (e.g. TL) on the outer side, and a numerical value of "-" denotes the deviation in a case where the end part of the other straight line seam (TR, for example) is on the outer side.

Furthermore, although the edging machine 10 has the control to execute the switching to the corner knife with a different incision length in accordance with the deviation as well as the control to cause the distance from the base part of the corner knife to the straight incision S, the set values of "setting the stitch formation start right side width for corner knife", "Setting stitch formation start left side width for corner knife", "Setting stitch formation end right side width for corner knife" or "Setting stitch formation end left side width for corner knife", it is also possible to apply a configuration in which only one of the above controls is performed. That is, even if only one of the above controls is executed, it is possible to eliminate the insufficient cutting toward the seam straight line, which is caused by the lifting of the work material due to the deviation while the inside corner knife moves for the purpose of the cutting-in operation moved up.

Further, although the corner knives of two different lengths are provided for left and right corner knives in each of the corner knife mechanisms according to the embodiment, it is obvious that more corner knives of different lengths can be installed. In this case, it is desirable that a corner knife with the longest cutting length is used only when the outer corner cutting part is used under a condition that the deviation is larger than the threshold.

Furthermore, in each of the corner knife mechanisms 100A, 100B, the index 106 can be positioned at an arbitrary position in the Y-axis direction by means of the index motor 121. However, in a case where precise adjustment in the Y-axis direction, for example, the "stitch formation start setting right side width for corner knife", "stitch formation start setting left side width for corner knife", "stitch formation end setting right side width for corner knife" or "stitch formation end setting left side width for Corner knife” is not required, it is also possible to use an air cylinder or an electromagnet capable of performing a position switching driving operation at a plurality of specified positions instead of the index motor 121.

28 Fig. 12 is a schematic view showing a configuration example in which the position changeover driving operation of the index 106 can be performed by using two air cylinders 125, 126 which can be changed over to two positions. Since constitutional structures other than the air cylinders 125, 126 are the same as those described above, they are given the same reference numerals and repeated description is omitted.

The index 106 is held movably in the Y-axis direction with respect to the unit body 105 . In the air cylinder 125, a front end part is a Piston part, which is moved forwards and backwards between two positions, fixed to the index 106 and coupled there. On the other hand, the air cylinder 126 functions as a stopper for stopping the index 106 at the two positions by abutting the piston part against a side surface of the index 106 to be moved back and forth between the two positions.

It is necessary for the index 106 to allow switching to a position where the up-down bracket 108a of the corner knife 102 is engaged with the cylinder bracket 133 (leftmost position: 28A ), a position in which the up-down brackets 107a, 108a of the corner knives 101, 102 are engaged with the cylinder brackets 133, 134 (a middle position: 28B ), and a position where the up-down bracket 110a of the corner knife 104 is engaged with the cylinder bracket 134 (a rightmost position: 28C ).

In the air cylinder 125, a range of movement of the piston is set to allow the index 106 to be switched to two positions, that is, the leftmost position and the rightmost position. On the other hand, in the air cylinder 126, the moving range of the piston is set to be switchable to two positions, that is, a non-interference position placed on a left side of the index 106 provided in the leftmost position and a middle position with an abutment to the index 106. Further, the air cylinder 126 to be used can hold the position more strongly than the air cylinder 125.

As a result, in the case where the index 106 is aligned with a position where the up-down bracket 108a of the corner knife 102 is engaged with the cylinder bracket 133, the air cylinder 125 is set to the leftmost position, and the air cylinder 126 is set to the non-interference position.

Moreover, in the case where the index 106 is aligned with a position where the up-down brackets 107a, 108a of the corner knives 101, 102 are engaged with the cylinder brackets 133, 134, the air cylinder 126 predominantly presses the air cylinder 125 so that when the air cylinder 126 is aligned with an intermediate position, the index 106 can be aligned with the middle position, with the air cylinder 125 being attracted to the left-most position.

Further, in the case where the index 106 is aligned with a position where the up-down bracket 110a of the corner knife 104 is engaged with the cylinder bracket 134, the air cylinder 125 is placed in the rightmost position, and the air cylinder 126 is placed in the non-interference position (any position).

Through the operation, the index 106 can be switched to the three positions, and the cutting-in operation using the respective corner knives 101 to 104 can be performed.

Moreover, although each of the index moving mechanisms 120 of the corner knife mechanisms 100A, 100B can place the index 106 in an arbitrary position in the Y-axis direction by means of the index motor 121 using the ball screw mechanism, it is also possible to use another mechanism in addition to the ball screw mechanism if the same function can be performed.

29 12 is a perspective view showing an index moving mechanism 220 using a slider crank mechanism instead of the ball screw mechanism, and 30A until 30C 12 are views for explaining a positioning operation in three predetermined places for selecting each of the corner knives 101 to 104.

The index moving mechanism 220 includes: an index motor 221 to be a positioning motor constituted by a stepping motor held stationary on the unit body 105 with an output shaft turned in the X-axis direction, a crank arm 222 attached to the output shaft of the index motor 221 and serving to perform a rotating operation, a slider member 223 fixed and coupled to the index 106 and serving to perform a linear reciprocating operation in the Y-axis direction, and a connecting rod 224 for coupling the slider member 223 to a rotating end of the crank arm 222.

With this structure, when the crank arm 222 is rotated around the X-axis by an output of the index motor 221 in the index movement mechanism 220, only a component of movement in the Y-axis direction is transmitted through the connecting rod 224 to the slider member 223, which is only in one direction can be moved, which is adjusted along the Y-axis direction, together with the index 106. At this time, a height of an output shaft 221a of the index motor 221 is adjusted to correspond with a height of a coupling shaft 225 for rotatably coupling the connecting rod 224 is coincident with the slider member 223 as in FIG 30 shown. Therefore, the index 106 and the slider mechanism 223 can be reciprocated within a double length range of a center distance of the crank arm 222 (a distance between a center line of the output shaft of the index motor 221 and a center line of a coupling shaft for coupling the crank arm 222 to the connecting rod 224).

As described above, the index 106 is placed in three positions, that is, the left-most position, the middle position, and the right-most position (see Fig 28A until 28C ). The lengths of the crank arm 222 and the crank rod 224 are determined so that the leftmost position and the rightmost position among the three positions are placed near one end of the reciprocating range and near the other end thereof will.

Since the slider crank mechanism is employed, a change in the amount of movement of the index 106 with respect to the rotation angle of the index motor 221 is largely reduced, as shown in FIG 30A and 30C shown moving to both ends within the reciprocating range of the index 106. Accordingly, rapid stopping can be prevented and stopping can be smoothly performed in the positioning to the leftmost position and the rightmost position will. Therefore, it is possible to effectively suppress vibration, noise, or positional shift.

In the movement towards the center position, the change in the amount of movement of the index 106 with respect to the rotation angle of the index motor 221 is maximized. However, the center position has a half length of a total length of the reciprocating range. Therefore, the influence of the vibration, noise or positional shift can be reduced and practically allowed.

As in 30A and 30C As illustrated, the left-most position and the right-most position may also completely coincide with an end of the index 106 reciprocation range and are desirably set slightly inside of the end, respectively. However, by setting them slightly on an inner side from the end, a movement distance to the end can be assigned to precise adjustment in the Y-axis direction, for example, as the "adjustment of the stitch formation start right side width for corner knife", the "adjustment of the stitch formation start left side width for Corner knife", "Setting the end of stitch formation, right side width for corner knives" or "Setting the end of stitch formation, left side width for corner knives".

Claims (5)

A binding machine (10) comprising: two needles (41) arranged separately from each other to form two parallel, rectilinear seams (TL, TR) on a main sewing material (M) and a binding patch (B); a needle vertical movement mechanism (40) which moves the two needles (41) in a vertical direction (Z); a cloth feeding mechanism (20) which holds the main cloth (M) and the binding patch (B) and feeds it in a cloth feeding direction (F); a movement knife mechanism (50) forming a linear incision (S) between the two linear seams (TL, TR); a pair of corner knife mechanisms (100A, 100B) arranged to correspond to respective end parts of the straight cut (S), each of the corner knife mechanisms (100A, 100B) having corner cut parts (VFL, VFR, VRL, VRR) between the corresponding one of the end parts of the straight line cut (S) and each of the adjacent end parts of the two straight line seams (TL, TR); and control means (81) which controls each of the mechanisms (40, 20, 50, 100A, 100B) to form the two straight seams (TL, TR) such that positions of the adjacent end parts of the two straight seams (TL, TR) are different from each other in the work feed direction (F), and to form the corner cut parts (VFL, VFR, VRL, VRR) sloping from the respective end parts of the two straight line seams (TL, TR) toward the straight line cut (S), wherein each of the pair of corner knife mechanisms (100A, 100B) comprises: a plurality of corner knives (101, 102, 103, 104) forming corner cut parts (VFL, VFR, VRL, VRR) on respective sides of the straight line seam (S) with different cut lengths ; and a vertical movement mechanism (130) which moves the selected pair of corner knives in the vertical direction (Z), and wherein the edging machine (10) further comprises: deviation setting means (85) storing information regarding a deviation (CF, CR) between the adjust adjacent end parts of the two straight line seams (TL, TR) in the work feed direction (F); deviation decision means (81) which, based on the information regarding the deviation, decides whether or not the deviation (CF, CR) exceeds a threshold value; and corner cutting part inside/outside deciding means (81) which decides whether each of the corners is inside pattern parts (VFL, VFR, VRL, VRR) to be formed from each of the adjacent end parts of the straight-line seams (TL, TR) toward the straight-line incision (S) with reference to a center of the straight-line incision (S) in the work feed direction (F) lies on an inner side or an outer side; wherein the control means (81) controls the work feed mechanism (20) and the corner knife mechanisms (100A, 100B) such that when the deviation deciding means (81) decides that the deviation (CF, CR) is smaller than the threshold value, each of the inner corner cut parts is formed at a position shifted from the position of the corresponding one of the outer corner cut parts in the work feeding direction (F) by the deviation (CF, CR); characterized in that each of the pair of corner knife mechanisms (100A, 100B) comprises a selection mechanism (120, 220) selecting from the plurality of corner knives (101, 102, 103, 104) a pair of corner knives for the respective sides of the straight incision ( S) and that the control means (81) control the selection mechanism (120, 220) such that when the deviation decision means (81) decide that the deviation (CF, CR) is greater than the threshold value, the corner knives (102 , 104) are selected with longer nick lengths for the respective outer corner nick parts as compared with a case where the deviation (CF, CR) is smaller than the threshold value. The binding machine (10) after claim 1 , further comprising: distance inputting means (85) for inputting a distance between an end part of each of said corner cut parts (VFL, VFR, VRL, VRR) on a side of a corresponding one of said straight-line seams (TL, TR) and a corresponding one of said straight-line seams (TL, TR ) in a direction (Y) perpendicular to the material feed direction (F) and perpendicular to a vertical direction (Z); wherein the selection mechanism (120, 220) comprises a position motor (121, 221) which moves each of the corner knives (101, 102, 103, 104) in the direction (Y) perpendicular to the material feed direction (F), and the control means (81) further control the positioning motor (121, 221) such that with respect to the corner knife (101, 102, 103, 104) to be moved in the vertical direction (Z) by the vertical moving mechanism (130), a distance between an end part of the corner knife (101, 102, 103, 104) on one side of the straight line cut (S) and the straight line cut (S) in the direction (Y) perpendicular to the work feed direction (F) becomes equal to the distance set by the distance input means (85) is set. The binding machine (10) after claim 1 or 2 wherein the movement blade mechanism (50) comprises: a movement blade (51) held above a feed path of the main cloth (M) and the binding patch (B) so as to be movable in the vertical direction (Z); and a knife motor (57) which moves the movement knife (51) in the vertical direction (Z), the control means (81) also controlling the knife motor (57) and the work feed mechanism (20) so that the straight incision (S) is formed from an end part of one of the outer corner cut parts on a side of the straight sipe (S) toward an end part of the other of the outer corner cut parts on a side of the straight sipe (S). The edging machine (10) according to one of Claims 1 until 3 wherein the selection mechanism (220) comprises a slider crank mechanism that converts rotary force into linear reciprocating motion for selecting the corner knife (101, 102, 103, 104). The binding machine (10) after claim 4 , wherein the selection mechanism (220) positions the respective corner knives (101, 102, 103, 104) at a plurality of positions within a reciprocating range of linear reciprocating movement to select the respective corner knives (101, 102, 103 , 104). The plurality of positions include respective ends of the reciprocating range.

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