JP2008054988A - Piping sewing machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To facilitate positioning setting work in sewing a flap. <P>SOLUTION: This piping sewing machine includes a cloth moving mechanism 40 carrying a fabric by a large presser feet 41, a marking illumination device 70 applying a point mark light for indicating a positioning criterion position of the fabric on a working table, positioning members 35 and 38 for a flap cloth F on the a large presser feet 41, a flap detecting means 30 for detecting the end of the flap cloth on the a large presser feet, a sewing control means 62b sewing the flap cloth to the fabric, a reference position setting means 65 setting the positioning reference position of the fabric as distances (b) and (b') to the end position of the flap cloth, an abutment part position setting means 65 inputting distances (a) and (a') indicating the flap end positions determined by the positioning member of the a large presser feet situated in a retaining start position, and an illumination control means 62b controlling to apply the point mark light at positions separated by the distances (b) and (b') from the flap end positions (a) and (a') of the retaining start positions. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to an edge stitch sewing machine for performing flap sewing.

The conventional ball stitching sewing machine irradiates the point mark with the marking light to any of the front reference, intermediate reference, and rear reference positions, and the sewer can select one of the sewing start position, intermediate position, and sewing end position of the fabric. By aligning with one of the corresponding point marks, the fabric was properly placed on the workbench.
On the other hand, the sewing machine holds the fabric arranged in this way with a large press from above and feeds the fabric on the premise that the fabric is set at the correct position by the point mark, and sews at a predetermined fabric feed amount. By executing the sewing control so as to start or end the sewing, an appropriate stitch is formed.

Further, in the case of ball edge sewing, when the flap cloth is sewn, sewing is performed from one end portion to the other end portion of the flap cloth. Therefore, the flap cloth is placed on the upper surface of the large presser, the end of the conveyed flap cloth is detected, and the sewing control for starting and ending the sewing is executed based on the detection. For detecting the edge of the flap cloth, a reflecting plate formed along the cloth feeding direction on the upper surface of the large presser and a means for detecting reflected light from the reflecting plate are provided, and a part of the reflecting plate is covered by the flap cloth. This is done by monitoring the change in the detected intensity of the reflected light at the time of conveyance caused by the above.
JP 2001-162078 A

By the way, when sewing the flap cloth, when the large presser holds the fabric at the holding start position, it is necessary to match the end position of the flap cloth set on the large presser with the planned sewing position of the fabric. There is. However, the conventional sewing machine does not have a means for making these coincide, and it is necessary to adjust the position of the flap cloth on the large press so as to coincide with the planned sewing position of the cloth previously arranged on the table. was there.
In such a case, in order to perform the same sewing continuously, a positioning member that can be adjusted in position is provided on the large presser so that the arrangement of the flap cloth on the large presser obtained at the first sewing can be reproduced. In order to reproduce the arrangement of the fabric at the first sewing, a method of storing the irradiation position of the marking light has been adopted.
However, when a new flap cloth with different sewing conditions is to be sewn, a lot of work is required, such as positioning of the cloth and flap cloth, adjustment of the position of the positioning member, and adjustment of the irradiation position of the marking light. Therefore, there is a disadvantage that it becomes very complicated.

  An object of the present invention is to easily sew a flap cloth.

  The invention described in claim 1 includes a work table on which the fabric is placed, two sewing needles that move up and down, sewing means that forms two seams parallel to the fabric, and the conveyance direction of the fabric A cloth moving mechanism that has a pair of large pressers that are extended to hold the fabric and conveys the large pressers from the fabric holding start position to the sewing position, and when the fabric is placed on the workbench A light emitting unit for irradiating a point mark for indicating which position along the cloth feed direction of the workbench should be aligned, and moving the irradiation position of the point mark along the cloth feed direction A marking irradiating device having a marking driving means, and an abutting portion for abutting a cloth feeding direction end of a flap cloth to be sewn on the cloth on the large press and positioning the cloth in the cloth feeding direction. Holding A positioning member arranged on the upper surface of the large presser so that the position can be adjusted along the hand direction, a flap holding mechanism for holding the positioned flap cloth on the upper surface of the large presser, and the transported by the large presser A flap detecting means for detecting an end of the flap cloth, and a sewing start or sewing end position is determined by the detection of the flap detecting means, and the cloth moving mechanism and the sewing means are controlled to sew the flap cloth onto the cloth. In a ball stitch sewing machine comprising sewing control means for performing, a reference position for alignment of the fabric that irradiates the point mark is along the fabric feed direction from the fabric feed direction end of the flap fabric sewn on the fabric. Reference position setting means for setting according to the distance, and contact for setting the cloth feed direction position when the large presser is positioned at the cloth holding start position When the point mark is applied to the position setting means and the set alignment reference position of the fabric, the reference position setting means sets the position mark from the contact portion position set by the contact portion position setting means. And an irradiation control unit that controls the marking driving unit so as to irradiate the point mark at a position separated in the cloth feeding direction by the distance.

The invention described in claim 1 will be described.
In the invention of the present application, the cloth cloth is placed on the cloth cloth placed on the work table and the flap cloth is scheduled to be sewn and the holding position of the flap cloth positioned by the large presser that has come to the holding start position to hold the cloth. The purpose is to match the feeding direction. This is because when they coincide with each other, the flap cloth is conveyed and sewn together in a state where the flap cloth is positioned at the planned sewing position of the cloth.
In order to achieve such an object, it is required that a point mark serving as a positioning reference for placing the fabric on the workbench irradiates an appropriate position on the workbench to properly arrange the fabric.
For this reason, in the present invention, the alignment reference position is set in advance by using the reference position setting means according to the distance from the end position of the flap cloth set on the cloth, and by the large pressing positioning member at the holding start position. The contact position of the determined flap cloth is set in advance by the contact position setting means.
As a result, the end position of the flap cloth on the large presser that has reached the holding start position is obtained, and the point mark is located at a position away from the position in the forward or reverse direction by the distance from the alignment reference position. , The fabric can be properly placed on the workbench. Therefore, it is possible to sew the flap cloth at a predetermined position with respect to the cloth.
Furthermore, it is possible to sew the flap cloth at a predetermined position with respect to the cloth only by performing setting input by the above-described position setting means, and further, the design condition and the planned sewing position of the flap cloth and the cloth are determined. Even if it is changed, it is possible to cope with a simple input work, and it is possible to improve workability.

  As the alignment reference position set for the fabric, any reference position whose distance from the end position of the sewn flap cloth is known may be selected, but it is necessary to align with the point mark. Must be visually recognizable. The alignment reference position may be, for example, a seam (for example, a dart seam or the like) formed at a fixed position of the fabric, an edge portion of the fabric, or the like.

Further, “the contact portion position along the cloth feeding direction of the contact portion when the large presser is positioned at the cloth holding start position” is not limited to a value indicating the position itself, but is calculated by addition / subtraction / division / division / calculation. It also includes other values that can determine the position.
For example, the holding start position of the large presser and the contact portion position of the positioning member on the large presser are set separately, and these are added and subtracted to obtain “the contact when the large presser is positioned at the holding start position of the fabric”. The case of calculating the “contact portion position along the cloth feeding direction of the portion” may be mentioned.
In addition, when the holding start position of the large presser is set in advance as a fixed position and the holding start position is stored in advance as data, the contact portion position determined by the positioning member on the large presser is set. Since “the contact portion position along the cloth feeding direction of the contact portion when the large presser is positioned at the cloth holding start position” can be calculated by addition / subtraction, “the contact portion position on the large presser” Can be considered in the same manner as the setting of “abutment portion position along the cloth feeding direction of the abutment portion when the large presser is located at the cloth holding start position”.

(Overall configuration of the embodiment of the invention)
Hereinafter, an edge stitch sewing machine 10 according to an embodiment of the present invention will be described with reference to FIGS. FIG. 1 is a perspective view showing an overall schematic configuration of the edge stitch sewing machine 10, and FIG. 2 is a front view of the edge stitch sewing machine 10. In the present embodiment, the direction of each part of the sewing machine 10 will be described with reference to the XYZ axes shown in the drawings. In the state where the sewing machine 10 is installed on the horizontal plane, the Z-axis direction indicates the vertical direction, the X-axis direction indicates the horizontal and the direction corresponding to the cloth feeding direction E, the Y-axis direction is horizontal and orthogonal to the X-axis direction. Indicates the direction to do.

The edge stitch sewing machine 10 according to the present embodiment overlaps a fabric C and a ball cloth (not shown) and sews them at a predetermined length with two needles 13 and 13, and also stitches between two stitches in a sewing direction. And a V-shaped cut is formed at both ends of the cut. Further, when the fabric C and the ball cloth are sewn, the flap fabric F is sewn on the fabric C on one of the two needles 13.
The bead stitch sewing machine 10 holds the fabric C on the table 11 from above by a table 11 as a mounting table serving as a sewing work table and a pair of large pressers 41 extending in the conveyance direction of the fabric C. A large presser feed mechanism 40 as a fabric moving mechanism that transports the fabric C, the ball cloth, and the flap fabric F by moving the large presser 41 in the transport direction, and each large presser 41 for the flap fabric F that is sewn on the fabric C. A flap holding mechanism 55 that holds the cloth on the fabric C, a binder mechanism that folds both sides of the cloth by applying the binder 12 to the cloth to be sewn on the fabric C, and a large press feed mechanism 40 along the X-axis direction. A needle up-and-down movement mechanism as a sewing means for sewing the cloth C and the ball cloth with the two sewing needles 13 and the moving knife 14 on the downstream side in the cloth feeding direction from the sewing needle 13 to raise and lower the cloth C and the ball cloth. Cut into A knife mechanism that forms eyes, a hook mechanism that captures the sewing thread from the sewing needle 13 and entangles the lower thread; a sewing machine frame 80 that is installed on the table 11 and stores and holds the needle vertical movement mechanism and the female mechanism; Light is irradiated to the corner knife mechanism 90 that forms a substantially V-shaped cut at both ends of the straight cut and the reflection surface 41c formed on the upper surface of the large presser 41 along the conveyance direction of the fabric C. And a flap detection means 30 for detecting the reflected light, and a marking irradiation device 70 for irradiating a point mark for indicating which position along the cloth feeding direction of the table 11 the alignment reference position of the fabric C should be aligned with. , Having an abutting portion 35c, 38c for positioning in the cloth feeding direction by bringing the cloth feeding direction end of the flap cloth F to be sewn into the fabric C into contact with the large pressing 41. A front positioning member 35 and the rear side positioning member 38 disposed in a position adjustable upper surface of the large pressing 41 along one longitudinal direction, and includes an operation control unit 60 for controlling the operation of each of the above structures.
Each part is described in detail below.

(Table and sewing frame)
The table 11 has an upper surface parallel to the XY plane and is used in a horizontal state. A needle plate 15 is attached to a needle drop position by the sewing needle 13 on the table 11. The needle plate 15 is formed with a needle hole into which the two sewing needles 13 are individually inserted and a slit into which the moving knife 14 of the knife mechanism is inserted.
Further, a recess for storing the bed portion 81 of the sewing machine frame 80 is formed on the table 11, and the sewing machine frame 80 is installed in the recess. Further, the table 11 is provided with a large press feed mechanism 40 and a corner knife mechanism 90 on the downstream side in the cloth feed direction of the sewing machine frame 80, and a binder mechanism (not shown except for the binder 12) on the upstream side in the cloth feed direction. Is arranged.

The sewing machine frame 80 mainly includes a bed portion 81 installed on the table 11, a vertical trunk portion 82 erected therefrom, and an arm portion 83 extending horizontally from the upper portion thereof.
A sewing machine motor 16 is disposed below the sewing machine frame 80, and a lower shaft that transmits a rotational driving force transmitted from the sewing machine motor 16 through a belt (not shown) to the shuttle mechanism is provided inside the bed portion 81 as a Y-axis. An upper shaft that transmits the vertical movement driving force of the needle vertical movement mechanism from the sewing machine motor 16 is supported in the arm portion 83 in a state along the Y-axis direction.
Pulleys are fixedly mounted on the upper shaft and the lower shaft, respectively, and are connected by a timing belt passed through the vertical body portion 82 of the sewing machine frame 80.

(Needle vertical movement mechanism)
The needle up-and-down movement mechanism is capable of sliding along the longitudinal direction of two sewing needles 13 constituting two needles, two needle bars each holding the two needles 13 at the lower end, and each needle bar The upper and lower metal bearings that are supported by the needle, the needle bar holder that holds the two needle bars simultaneously, the upper shaft that is rotationally driven by the sewing machine motor 16, and the rotary weight that is fixedly connected to one end of the upper shaft and performs rotational motion And a crank rod having one end connected to a position eccentric from the rotation center of the rotary weight and the other end connected to a needle bar holder.

When the upper shaft is rotated, the rotating weight also rotates together with the upper shaft, and one end portion of the crank rod performs a circular motion around the upper shaft along with the rotating weight. At the other end portion of the crank rod, only the moving component is transmitted to the needle bar holder in the Z-axis direction of the one end portion that performs circular motion, and a reciprocating vertical movement force is applied to each needle bar.
Further, the two sewing needles 13 are arranged side by side along the Y-axis direction. And the binder 12 mentioned later is arrange | positioned at the front-end | tip part between the needle drop positions of two needles at the time of sewing, and the two needles 13 are sewn on both sides with the binder 12 in between.

(Female mechanism)
The knife mechanism includes a moving knife 14 that forms a linear cut, a knife provided with the knife 14 at the lower end and supported so as to move up and down within the arm 83, and a drive source for moving the knife up and down. A knife motor 17, a transmission mechanism that transmits the rotational driving force from the knife motor 17 in place of a reciprocating driving force in the vertical direction, and an air cylinder that switches the moving knife 14 between a standby position and a cutting position by moving up and down.
The moving knife 14 is disposed adjacent to the two needles 13 and downstream of the two needles 13 in the cloth feeding direction (left side in FIG. 2).
The knife motor 17 is rotationally driven together with the feeding operation of the fabric C, and the moving knife 14 is moved up and down by the transmission mechanism to repeatedly form a cut according to the knife width to form a linear cut.

(Hook mechanism)
The shuttle mechanism is provided in the bed portion 81 of the sewing machine frame 80. This hook mechanism is equipped with two horizontal hooks individually corresponding to the two sewing needles 13, a hook gear provided on the rotating shaft of each horizontal hook, and a fixedly mounted on the lower shaft, and each hook gear rotates individually. And a transmission gear for applying a driving force.
When the lower shaft is rotationally driven by the sewing machine motor 16, the rotational driving force is transmitted to the hook gear via each transmission gear, and each horizontal hook is rotated via the hook shaft. Each horizontal hook catches the sewing thread from the sewing needle when the tip of the sewing needle 13 is lowered to the lower side of the needle plate 15, and rotates in the trapped state so that the sewing thread loops through the horizontal hook. Insert the thread and entangle the sewing thread and lower thread. In this way, sewing is performed by the cooperation of the sewing needle and the horizontal hook. That is, the sewing means is constituted by the needle up-and-down moving mechanism and the shuttle mechanism.

(Binder mechanism)
The binder mechanism has an inverted T-shaped cross section, a binder 12 that is set so as to wind a ball and is sent out along the longitudinal direction, and a support mechanism (not shown) that supports the binder 12 so as to be movable up and down. is doing.
The binder 12 has an inverted T-shape when viewed in cross section from a bottom plate facing the top surface of the table 11 and a standing plate erected perpendicularly to the top surface of the flat plate.
The support mechanism includes an air cylinder (not shown) serving as a drive source for the raising and lowering operation of the binder 12, an electromagnetic valve 18 (see FIG. 7) that drives the air cylinder, and the driving force of the air cylinder is changed to a vertical moving force. And a plurality of link bodies to be applied to the binder 12.
At the time of sewing, the binder mechanism lowers the binder 12 by the air cylinder so that the tip of the binder 12 is located between the needle drop positions of the two needles 13. Then, in cooperation with a pair of large pressing members 41 of the large pressing feed mechanism 40 described later, the yarn is fed in the longitudinal direction while being held so as to be wound around the binder 12 so as to have a cross-sectional shape of the binder 12. Sewing to the fabric C is performed.

(Large press feed mechanism)
FIG. 3 is a perspective view of the large presser feed mechanism 40. As shown in FIGS. 2 and 3, the large presser feed mechanism 40 is individually disposed at a position on both sides of the sewing needle 13, and a pair of large pressers 41 that press the fabric C from above and below each large presser 41. In addition, two laying plates 47 for placing the fabric C when the cloth is fed, a pair of arm members 48 for individually holding the large pressers 41, and the two large pressers 41 can be moved up and down via the arm members 48. A support 42 that is supported by the support 42, an interval adjusting mechanism 49 of the large press 41 that makes it possible to adjust the position of each arm member 48 held by the support 42 along the Y-axis direction, and a large press 41 against the support 42. An air cylinder 43 that moves the air cylinder 43 up and down, a solenoid valve 44 that controls driving of the air cylinder 43 (see FIG. 4), a presser motor 45 that moves the fabric C pressed by the large presser 41 in the cloth feed direction E, and a presser Mo And a ball screw mechanism 46 for transmitting and converting the rotational driving force of the motor 45 to linear motion driving force along the X-axis direction to the support 42.

Each large presser 41 is a flat plate having a slightly wedge-shaped cross section and a rectangular shape in plan view, and is supported by the support 42 in a state where the edges whose thickness is reduced face each other. The two large pressers 41 are arranged side by side in the Y-axis direction with the two needles 13 interposed therebetween, and are supported by the arm member 48 so that the longitudinal direction thereof is along the X-axis direction.
Furthermore, each large presser 41 is composed of a top plate and a bottom plate, and each large presser 41 has a gap that opens toward the other large presser side. A presser plate 50 that can be advanced and retracted is stored in the gap between the large pressers 41. The presser plate 50 of each large presser 41 can be reciprocated along the direction (Y-axis direction) in which the presser plate 50 of each large presser 41 is brought into contact with and separated from each other. The air cylinder 51 is driven by an electromagnetic valve 52 (see FIG. 7) controlled by the operation control means 60, and the pressing plates 50 are moved closer to each other so that both ends of the above-described ball cloth are attached to the binder 12. It is possible to fold so that it is wound and to maintain the state.

  In addition, a long reflecting surface 41c is formed on the upper surface of each large presser 41 over the entire length in the longitudinal direction. The reflection surface 41c is used for detecting the upstream end position and the downstream end position of the cloth feed direction of the flap cloth F held by the flap holding mechanism 55 described later. That is, when the flap cloth F is placed on the reflection surface 41c and a part of the reflection surface 41c in the longitudinal direction is shielded, the decrease in the reflectance of the shielding portion is detected by the flap detection means 30. The operation control means 60 recognizes the upstream end position and the downstream end position of the flap cloth F in the cloth feeding direction.

  Each arm member 48 is swingably supported by a support shaft 42a provided along the Y-axis direction on one end side of the support 42. Then, the large presser 42 is held on the front end side of each arm member 48 and the rear end side is raised and lowered by the air cylinder 43. As a result, each arm member swings to raise and lower the large presser 41. ing.

  The interval adjusting mechanism 49 is provided between each arm member 48 and the support shaft 42a. Each interval adjusting mechanism 49 can fasten and fix the arm member 48 that moves along the support shaft 42a at an arbitrary position. Thereby, each large presser 41 can be adjusted to an arbitrary position in the Y-axis direction via each arm member 48, and the distance between each large presser 41 can also be adjusted.

Each laying plate 47 is fixedly mounted on the support 42 while being placed on the upper surface of the table 11 below the large presser 41, and moves along the cloth feed direction E together with the large presser 41. Each laying plate 47 extends along the X-axis direction and is set to have approximately the same width as the large presser 41 in the Y-axis direction. Each laying plate 47 is arranged with the two needles 13 sandwiched so as not to cover the needle plate 15 during sewing.
Each laying plate 47 is always positioned at the height of the upper surface of the table 11, and each large presser 41 descends to hold the fabric C in a sandwiched state. In other words, each laying plate 47 is provided on the lower side of the cloth C, and protects it from sliding directly on the upper surface of the table 11 when the cloth C is conveyed.

The air cylinder 43 can switch each large presser 41 between an upper position and a lower position via an arm member 48 by an electromagnetic valve 44, and each large presser 41 is separated from the upper surface of the laying plate 47 in the upper position. In the lower position, each large presser 41 is lowered to the height of the upper surface of the laying plate 47. The operation of the solenoid valve 44 of the air cylinder 43 is controlled by the operation control means 60.
The ball screw mechanism 46 supports the support 42 so as to be movable along the X-axis direction on the table 11, and arbitrarily positions the two large pressers 41 in the X-axis direction by driving the presser motor 45. It is possible.

(Flap holding mechanism)
As shown in FIG. 3, the flap holding mechanism 55 is individually provided on the upper surface of each large presser 41. Each flap holding mechanism 55 is flapped by a flap pressing member 56 that is pivotally supported by an arm member 48 so as to be able to contact and separate from the upper surface of the large pressing member 41, and an air cylinder 57 that applies rotational force to the flap pressing member 56. The cloth F is held and released.
The flap holding mechanism 55 is for holding the sewing end of the flap cloth F along the X-axis direction, and the sewing end of the flap cloth F moves the large pressers 41. Occasionally, the flap cloth F is held so as to pass the needle drop position of one sewing needle 13. And the flap cloth F is hold | maintained at the flap holding | maintenance mechanism 55 in the state which covers the reflective surface 41c of the large presser 41 from the top over the longitudinal direction full length of the said flap cloth F concerned.
The flap holding mechanism 55 is provided for each large presser 41, but only one of them is selected and used during the sewing operation of the flap cloth F.

(Flap detection means)
Two flap detection means 30 are provided corresponding to the reflection surfaces 41 c of the large pressers 41, and are provided side by side along the Y-axis direction on the front side of the arm portion of the sewing machine frame 80. Each of these flap detection means 30 is provided above the movement path of each large presser 41 and upstream of the two needles 13 in the cloth feeding direction (right side in FIG. 2).
Each flap detection means 30 detects a light source 33 (see FIG. 4, not shown in FIG. 1) as a light projecting member that emits irradiation light to the reflection surface 41 c of the large presser 41 and the reflection light from the reflection surface 41 c. A flap sensor 31 as a detection member for inputting a detection signal to the operation control means 60 and a support bracket 32 for supporting the flap sensor 31 on the outer surface of the sewing machine arm portion 83 are provided.
The support bracket 32 supports the flap sensor 31 above the reflective surface 41c of the large press 41 with the flap sensor 31 facing downward, and the flap sensor 31 emits light downward to detect the reflected light from the reflective surface 41c. It has become.
With this configuration, when the flap cloth F is placed on the upper surface of the large presser 41, a part of the reflective surface 41c is shielded and the reflected light is shielded, so that the flap end is detected by the detection signal of the flap sensor 31. It becomes possible to do.
Further, as described above, since the position of each large presser 41 can be adjusted along the Y-axis direction by the interval adjusting mechanism 49, each flap sensor 31 is arranged vertically above the reflecting surface 41c of each large presser 41. Therefore, the support bracket 32 supports the flap sensor 31 so that its position can be adjusted along the Y-axis direction. That is, the support bracket 32 holds the flap sensor 31 with a slot-shaped guide hole along the Y-axis direction (not shown) and enables the flap sensor 31 to move along the guide hole. It can be fixed with screws. Thereby, when the position of the large presser 41 is adjusted, the position of the flap sensor 31 is also adjusted so as to be vertically above the reflecting surface 41c.

(Positioning member)
FIG. 5 is an enlarged plan view of the front positioning member 35. The front side positioning member 35 and the rear side positioning member 38 are respectively provided on the upper surface of each large presser 41 at the end portion in the cloth feed forward direction and the opposite end portion. Hereinafter, the front positioning member 35 will be described with reference to FIG. 5, but the rear positioning member 38 has the same structure as the front positioning member 35.
The front positioning member 35 includes a plate-like body 36 having a predetermined thickness and a set screw 37 that fixes the plate-like body 36 to the upper surface of the large presser 41. As shown in FIG. 5, the plate-like body 36 has a function of positioning the flap cloth F by bringing the one end 35 c in the cloth feeding direction into contact with the end of the flap cloth.
That is, the one end portion 35C of the plate-like body 36 functions as an abutting portion that abuts the end portion of the flap cloth F in the cloth feed direction on the large presser 41 and positions the flap cloth F in the cloth feed direction.
Further, a long hole is formed through the plate-like body 36 along the cloth feeding direction, and a set screw 37 is inserted into the long hole. Then, by loosening the set screw 37, the position of the plate-like body 36 can be adjusted along the cloth feeding direction, and the positioning position of the end position of the flap cloth F can be adjusted. In addition, a plurality of screw holes that are screwed into the set screw 37 are formed in a line at predetermined intervals on the upper surface of the large presser 41. By changing the mounting position of the set screw 37, a wider range of plates can be obtained. It is possible to adjust the position of the body 36. These position adjustments have the same structure for the rear positioning member 38.

(Marking irradiation device)
As shown in FIGS. 1, 2, and 6, the marking irradiation device 70 includes a first marking light 71 as a light emitting unit that irradiates slit light L1 along the X-axis direction downward, and a Y-axis direction. A second marking light 72 as a light emitting unit for irradiating the slit light L2 downward, and an X-axis position adjustment as a marking light driving means for rotating and adjusting the second marking light 72 about an axis along the Y-axis direction. And a motor 73.
The point mark that the marking irradiation device 70 irradiates the upper surface of the table 11 is along the Y axis direction that the slit light L1 along the X axis direction that the first marking light 71 irradiates and the second marking light 72 irradiates. It consists of slit light L2. That is, the alignment reference position for placing the cloth C on the table 11 is indicated by the intersection position of the slit light L1 and the slit light L2.

The second marking light 72 moves the irradiation position of the second marking light 72 around the axis along the Y-axis direction by driving the X-axis position adjusting motor 73.
The X-axis position adjusting motor 73 is a stepping motor as a marking driving unit whose operation is controlled by the operation control unit 60, and the irradiation position of the slit light L2 can be moved along the X-axis direction by step driving. ing.

  With the above configuration, the marking irradiating device 70 sets the reference position (referred to as the previous reference position) and the sewing end position for aligning the sewing start position in the case of edge stitching without sewing of the flap cloth F. A reference position (to be referred to as a rear reference position) for alignment and an intermediate position between them are irradiated. The control data of the X-axis position adjusting motor 73 for irradiating each irradiation position is a fixed value and is stored in the ROM 62 of the control device 60 described later. Further, at the time of ball stitching accompanied by sewing of the flap cloth F, an irradiation position in the X-axis direction is calculated by an irradiation position control program 62a described later.

(Corner knife mechanism)
The corner knife mechanism 90 is disposed below the table 11 and downstream of the moving knife 14 in the passage path of the large presser 41 by the large presser feed mechanism 40 (left side in FIG. 2). A substantially V-shaped cut V is formed at a position that becomes both ends of the straight cut by causing the cloth C conveyed to the working position of the corner knife 91 by the press feed mechanism 40 to penetrate the pair of corner knife 91 from below.
That is, the corner knife mechanism 90 includes an air cylinder 92 that moves the corner knife 91 up and down, an electromagnetic valve 93 that drives the air cylinder 92, and a drive motor 94 that moves and positions the corner knife 91 along the X-axis direction. I have.

The corner knife 91 has a V-shaped cross section viewed from above, and forms a V-shaped cut V by penetrating each fabric from below.
In other words, the distance between the pair of corner knives 91 is set in advance by the drive motor 94, and the fabric C and the ball on which the seam and the linear cut are formed are moved in the cloth feed direction E by the large press feed mechanism 40. When transported to a predetermined position downstream of the knife 14, the pair of corner knife 91 is raised to form two V-shaped cuts V.

(Control system for hem stitch machine)
FIG. 4 is a block diagram showing a control system of the edge stitch sewing machine 10. As shown in this figure, the operation control means 60 has a display panel 64 for displaying various control status information to be described later, a setting switch 65 for inputting various settings relating to sewing, and an activation for inputting the start of sewing. The switch 66 and the operation pedal 68 are connected via an input / output circuit (not shown).
The start switch 66 is a means for inputting the start of sewing and execution of irradiation position control before the start of sewing. When the start switch 66 is input, input by the operation pedal 68 for executing sewing is possible. Become.
The operation pedal 68 is an instruction input unit that shifts to the start of sewing when it is depressed after the start switch 66 is input. That is, sewing can be executed through the two-step operation of the start switch 66 and the operation pedal 68 described above.

Further, the setting switch 65 sets parameters necessary for processing of an irradiation position control program 62a described later. That is, the distances b and b ′ in the cloth feeding direction from the cloth feeding direction ends FP and BP of the flap cloth F sewn on the cloth C to the dart stitches D1 and D2 are the marking irradiation device 70 on the cloth C. 35C is set as a reference position for positioning the cloth C when irradiating the cloth C, and the contact portions 35C of the positioning members 35 and 38 are determined from the needle drop position of the sewing needle 13 when the large presser 41 is positioned at the holding start position of the cloth C. The distances a and a along the cloth feeding direction up to 38C are set as the contact position of each contact part 35C and 38C. These values are stored in the ROM 62.
That is, as a result, the setting switch 65 functions as a reference position setting unit and a contact portion position setting unit.
Further, from the setting switch 65, a setting as to whether or not the flap sewing is accompanied by sewing of the flap cloth and a setting as to whether the front sewing or the rear reference is performed in the ball sewing is input. These settings are stored in the ROM 62.

The operation control means 60 includes a sewing machine motor 16, a presser motor 45, a knife motor 17, a corner knife drive motor 94, and a marking light X-axis position adjustment motor 73, which are objects to be controlled, as drivers 16 a, 45 a, and 17 a, respectively. , 94a, 73a.
The operation control means 60 includes an air cylinder that moves the binder 12 up and down, an air cylinder 43 that raises and lowers the large presser 41, an air cylinder 51 that operates the presser plate 50, an air cylinder that holds the flap cloth F, a corner Solenoid valves 18, 44, 52, 58, 93, 20 for controlling the operation of the air cylinder 92 that raises and lowers the knife 91 and the air cylinder that switches between the standby state and the usable state of the moving knife are drivers 18 a, 44 a, 52 a, 93 a , 20a.
Further, the light source 33 of the flap detection means 30 and the marking lights 71 and 72 of the marking irradiation device 70 are connected to the operation control means 60 via power supply circuits 33a, 71a and 72a. 31 is connected via an interface 31a.

The operation control means 60 includes a CPU 61 that performs various controls, a point mark irradiation position control program 62a when performing edge stitching with sewing of the flap cloth F, and a sewing control program 62b for executing edge stitching. , ROM 62 that stores various setting data for performing sewing of the flap cloth F, and RAM 63 that stores various data related to the processing of the CPU 61 in the work area. The ROM 62 is a flash memory that can rewrite the stored contents. Further, the ROM 62 is a memory in which data can be written, and stores the irradiation position of the point mark obtained by the processing of the irradiation position control program 62 a and various parameters input from the setting switch 65.
Further, as described above, the ROM 62 also stores positioning data of the X-axis position adjustment motor 73 for irradiating the point mark at the front reference position and the rear reference position at the time of edge stitching without the flap cloth F being sewn. It is remembered.

(Irradiation position control program)
The point mark irradiation position control program 62a when performing the edge stitching with the sewing of the flap cloth F will be described in detail with reference to FIGS.
As shown in FIG. 6, two dart seams D1, D2 are formed on the fabric C along the Y-axis direction perpendicular to the cloth feed direction in the edge stitch, and the dart seams D1, D2 The irradiation position of the slit light L2 of the point mark is determined using either one as the alignment reference position. Which of the dart seams D1 and D2 becomes the alignment reference position is determined by setting the setting switch 65. In the following description, when the dart seam D1 on the front side (downstream side in the cloth feed direction) is used as the alignment reference position, this is referred to as “front reference”, and the dart seam D2 on the rear side (upstream side in the cloth feed direction) The reference position is referred to as “rear reference”.

The large presser feed mechanism 40 generally moves from the downstream side in the cloth feed direction to the upstream side with the large presser 41 floating above the upper surface of the table 11, stops at a predetermined position, and moves on the upper surface of the table 11. When the fabric C is properly positioned and arranged, the large presser 41 is lowered to hold the fabric. Hereinafter, the stop position of the large presser 41 when the cloth is held is referred to as a “holding start position”.
In the irradiation position control program 62a, the cloth feed direction position of the flap cloth F set on the upper surface of the large presser 41 positioned at the holding start position and the sewing schedule of the cloth cloth C on the table 11 in the cloth feed direction. It is necessary to calculate the irradiation position of the point mark slit light L2 so that the position matches.
Therefore, in the irradiation position control program, the position of the end portion of the flap cloth F on the upper surface of the large presser foot 4I is specified by the contact portion positions of the contact portions 35c and 38c set in advance as parameters, and this specified end portion is determined. Control is performed by irradiating point marks at positions separated by a distance from the end of the flap cloth to the dart seam set in advance as the alignment reference position.
That is, as described above, the alignment reference position set by the reference position setting means is set as a relative distance from the end of the flap cloth F in the cloth C in a state where the flap cloth F is sewn. However, since the position with respect to the needle drop position is not specified by itself, the position of the end portion of the flap cloth F placed on the upper surface of the fabric C by the lowering of the large presser 41 is set to the position of the contact portions 35C and 38C. The position is set in advance via the position, and the reference position of the alignment with respect to the end of the flap cloth F is obtained on the basis of the set position of the end of the flap cloth F, and the point mark is irradiated to the obtained position. If the cloth C is set so that the position coincides with the alignment reference of the cloth C at the irradiation position, the position of the end of the flap cloth F when the large presser 41 is lowered onto the cloth C is sewn on the cloth C. It can be made to correspond with the position of the edge part of the flap cloth F in a wearing position.
In the “front reference”, the position of the contact portion 35c of the positioning member 35 on the upper surface of the large presser 41 at the holding start position and the downstream end portion in the cloth feed direction of the flap cloth F sewn on the fabric C In the “rear reference”, the contact position of the contact portion 38c of the positioning member 38 on the upper surface of the large presser 41 at the holding start position and the cloth feed of the flap cloth F sewn on the cloth C are performed. It is necessary to match the sewing position FP at the upstream end in the direction.
For this reason, the flap cloth F is expected to be sewn on the cloth C placed on the work table, and the flap cloth F is held by the large presser 41 that has come to the holding start position to hold the cloth C. The position can be matched with respect to the cloth feeding direction.

In the case where the pre-reference is taken as an example, as shown in FIGS. 6 and 7, the irradiation position of the point mark slit light L2 for realizing the above-mentioned coincidence is input from the setting switch 65, and the large presser 41 is the cloth. From the distance a to the needle drop position of the sewing needle 13 indicating the downstream end position Pf of the flap cloth, which is determined by the contact portion 35c of the positioning member 35 when positioned at the holding start position of C, and the dart seam D1 of the cloth C It is calculated | required from the value with the distance b along the cloth feed direction to the position FP of the downstream edge part of the flap cloth F. FIG.
Since the position of the positioning member 35 can be adjusted as described above, the value of the distance a corresponding to the end position Pf is determined by moving the large presser 41 to the holding start position in a state where the position adjustment of the positioning member 35 is completed. In this state, the distance from the sewing needle 13 to the abutting portion 35c of the positioning member 35 is obtained by measurement and input by the setting switch 65.
The distance b from the dart seam D1 to the flap end planned position FP is input by the setting switch 65 by arbitrarily determining the position of the flap cloth F to be sewn with respect to the dart seam D1.
By executing the irradiation position control program 62a, the CPU 61 refers to the input values of the distance a and the distance b corresponding to the end position Pf and sets the position of the point mark as the distance a + b along the cloth feeding direction from the sewing needle 13. The X-axis position adjustment motor 73 is controlled to calculate the irradiation position of the slit light L2 and irradiate the same position.

In the case of the rear reference, as shown in FIG. 8, the irradiation position of the slit light L2 of the point mark is input from the setting switch 65, and the positioning member when the large presser 41 is positioned at the holding start position of the fabric C The distance a ′ from the dart stitch D2 of the fabric C to the position BP of the upstream end of the flap cloth F, and the distance a ′ to the needle drop position of the sewing needle 13 indicating the upstream end of the flap cloth defined by the contact portion 38c of the fabric 38 It is obtained from the value of the distance b ′ along the feed direction.
By executing the irradiation position control program 62a, the CPU 61 refers to the input values of the distance a ′ and the distance b ′ facing the end position, and the distance a facing the end position along the cloth feeding direction from the sewing needle 13. The position of “−b” is calculated as the irradiation position of the point mark slit light L2, and the X-axis position adjustment motor 73 is controlled so as to irradiate the same position.
The CPU 61 functions as an irradiation control unit by executing the irradiation position control program 62a.

(Processing based on irradiation position control program)
The processing content based on the irradiation position control program 62a will be described with reference to the flowchart of FIG.
First, the CPU 61 reads the setting of whether or not the flap cloth F is sewn in the ROM 62 (step S11).

If execution of sewing without sewing the flap cloth F is selected (step S11: NO), the reference position setting in the ROM 62 is read (step S12). (Step S12: YES), the irradiation position of the slit light L2 of the point mark indicating the sewing start position on the fabric C is read from the ROM 62 (Step S13). Then, the X-axis position adjustment motor 73 is driven so as to irradiate the position (step S20), and the marking lights 71 and 72 are irradiated (step S21).
In the case of the rear reference (step S12: NO), the irradiation position of the slit light L2 of the point mark indicating the sewing end position on the fabric C is read from the ROM 62 (step S14). Then, the X-axis position adjustment motor 73 is driven so as to irradiate the position (step S20), and the marking lights 71 and 72 are irradiated (step S21).

Further, when execution of sewing is selected with the sewing of the flap cloth F (step S11: YES), the reference position setting in the ROM 62 is read (step S15). Step S15: YES), the value of the distance a indicating the end position Pf of the flap cloth determined by the positioning member 35 of the large holding 41 at the holding start position is read from the ROM 62, and whether or not the value of the distance a is 0 Is determined (step S16). The distance a is a default value (initial value before artificial setting input is performed) is set to 0. When the distance a = 0, the distance is set even though the sewing of the flap cloth F is selected. It means that the setting input of a has not been performed.
If the distance a in the ROM 62 is 0 (step S16: NO), the irradiation of the alignment reference position cannot be performed. In the same manner as in step S13, the process proceeds to step S13, where the irradiation position of the slit light L2 of the point mark that indicates the sewing start position is read out, and irradiation at the position is performed.

  If the distance a in the ROM 62 is not 0 (step S16: YES), the flap cloth distance a and the distance b from the dart seam D1 to the flap end planned position FP are read from the ROM 62 and added. (Step S17). Then, the X-axis position adjustment motor 73 is driven so as to irradiate the position of the distance a + b (step S20), and the marking lights 71 and 72 are irradiated (step S21).

  If the reference position setting in the ROM 62 is the rear reference (step S15: NO), it is determined whether or not the value of the flap cloth distance a 'is 0 (step S18). When the distance a ′ = 0 (step S18: NO), it is impossible to irradiate the alignment reference position. Therefore, the sewing is not accompanied by the sewing of the flap cloth F and is the same as the case of the rear reference. Then, the process proceeds to step S14, and the irradiation position of the slit light L2 of the point mark indicating the sewing end position is read out, and the irradiation of the position is performed.

When the distance a ′ in the ROM 62 is not 0 (step S18: YES), the distance a ′ of the flap cloth and the distance b ′ from the dart seam D2 to the flap end planned position BP are read from the ROM 62. Then, it is subtracted (step S19). Then, the X-axis position adjustment motor 73 is driven so as to irradiate the position a′−b ′ (step S20), and the marking lights 71 and 72 are irradiated (step S21).
In the above description, the flap end planned positions FP and BP are the downstream side in the cloth feed direction of the flap F when the flap F is sewn to the cloth C at the planned sewing position to be sewn. The planned position where the edge part of this and the edge part of the cloth feed direction upstream are located is shown.
As described above, the irradiation position control program 62a is set by, for example, the contact portion position setting means when the point mark is irradiated to the position of the dart D1 or D2 as the alignment reference position set to the fabric C. It functions as an irradiation control means for controlling the X-axis position adjustment motor 73 based on the contact position set by the contact position setting means and the distance set by the reference position setting means.

(Sewing control program)
The sewing control program 62b when performing the edge stitching with the sewing of the flap cloth F will be described. The CPU 61 functions as a sewing control means by executing the sewing control program 62b. FIG. 10 is a flowchart of operation control for sewing the flap cloth F. Thereby, control to each part which CPU61 performs based on the sewing control program 62b is demonstrated in detail.

First, it is determined whether or not the CPU 61 and the start switch 66 are input (step S41). If there is no input, the determination is repeated, and if there is an input, the process proceeds to step S42.
In step S42, it is determined whether or not the operation pedal 68 is input. If there is no input, the determination is repeated. If there is an input, the presser motor 45 is activated to move the large presser 41 forward and to perform operation control to carry the sheet in the direction opposite to the cloth feed direction E to the holding start position (step S43).

  Next, for each large presser 41 that has reached the use start position, the fabric C is set on the lower side of each large presser 41 according to the irradiation position of the point mark, and the ball cloth is set on the upper side of each large presser 41. Then, the air cylinders 43 and 51 and the binder air cylinder are driven through the electromagnetic valves 44, 52 and 18, and the fabric C and the ball cloth are held. Further, when the flap cloth F is set on the upper surface of one of the large pressers 41, the air cylinder 57 is driven via the electromagnetic valve 58, and the flap cloth F is held (step S44).

Next, the presser motor 45 is driven to perform operation control for moving the large presser 41 forward from the use start position toward the cloth feeding direction E (step S45).
Then, with the movement of the large presser 41, it is determined whether or not one of the flap sensors 31 has detected reflected light (step S46). If there is no detection, the determination is repeated. If there is detection, the process proceeds to step S47. To proceed. The detection of the reflected light here indicates that the downstream end portion (the left end portion in FIG. 2) of the reflection surface 41c of one large presser 41 is detected in the cloth feeding direction.

  In step S47, it is determined whether or not the other flap sensor 31 has detected the reflected light. If there is no detection, the process returns to step S46, and the detection of the reflected light is determined again for the one flap sensor 31. If there is, the process proceeds to step S48. The detection of the reflected light here indicates that the downstream end (the left end in FIG. 2) of the cloth feeding direction of the reflection surface 41c of the other large presser 41 has been detected.

  Next, when the reflected light is detected by both the flap sensors 31, it is determined whether or not the detection of the reflected light by any one of the flap sensors 31 has been stopped (step S48). The fact that the detection of the reflected light ceases means that the flap cloth F is placed on one of the large pressers 41 and the downstream end portion of the flap cloth F is detected by the corresponding one flap sensor 31. . Note that the sewing of the flap cloth F is started from the downstream end portion in the cloth feeding direction, and the sewing is finished at the upstream end portion in the cloth feeding direction.

When either one of the flap sensors 31 detects the downstream end of the flap cloth F, the counting of the rotation angle of the pressing motor 45 is started, and the distance from the flap sensor 31 to the sewing needle 13 is conveyed. It is determined whether or not it has been performed (step S49). If the sewing needle 13 has not been reached, the determination is repeated.
If the feed amount to the sewing start position has been reached, the sewing machine motor 16 is driven to start sewing (step S50).

Further, it is determined from the integrated count value of the rotation angle of the pressing motor 45 whether or not the distance of the distance from the flap sensor 31 to the moving knife 14 is added by the length of the cutting length by the corner knife (step S51). ) If the distance is not reached, the determination is repeated.
When the cutting start distance is reached, the knife motor 17 is driven and the air cylinder is operated via the electromagnetic valve 20 to lower the moving knife 14 (step S52). Thereby, cutting is started.
The female motor 17 may be started to drive at an earlier time in order to stabilize its rotation.

After the start of cutting, it is determined whether any one of the flap sensors 31 (only the flap sensor 31 whose detection of reflected light has been stopped in step S48) has detected the reflected light (step S53), and the detection is stopped. If the condition continues, the determination is repeated. That is, when the detection of the reflected light is resumed, the position is recognized as the upstream end of the flap cloth F in the cloth feeding direction.
When the detection is resumed, the counting of the feed amount of the fabric C and the like is newly started from the number of rotations of the pressing motor 45.

Then, it is determined from the integrated count value of the rotation angle of the presser motor 45 whether or not the distance from the flap sensor 31 to the sewing needle 13 has been conveyed (step S54). Repeat the determination.
If the feed amount until the sewing stop is reached, the sewing machine motor 16 is stopped and the sewing is finished (step S55).

Further, it is determined from the accumulated count value of the rotation angle of the pressing motor 45 whether or not the distance of the distance from the flap sensor 31 to the moving knife 14 is reduced by the cutting length by the corner knife (step S56). If the distance has not been reached, the determination is repeated.
If the feed amount up to the cutting end distance has been reached, the air cylinder is operated via the solenoid valve 20 to raise the moving knife 14 (step S57). Thereby, cutting is completed.

Further, the fabric C is conveyed in order from the integrated count value of the rotation angle of the pressing motor 45 to the cutting position by each corner knife 91 (step S58), and the air cylinder 92 is driven via the electromagnetic valve 93 to each corner knife 91. Disconnection is executed (step S59).
Thereafter, each large presser 41 is returned to a predetermined standby position and raised to release the holding of the fabric C, and sewing is completed (step S60).

  In addition, in the case of the control of the edge stitch sewing without the sewing of the flap cloth F, the end detection by the flap sensor 31 is not performed, and the accumulated count of the rotation angle of the presser motor 45 from the holding start position by the large presser 41 is performed. Is started, and sewing start and end and cutting start and end are performed based only on the count value. The count values that determine the start and end of this are determined by the distance from the holding start position to the sewing needle and moving knife, the set sewing length, and the cutting length of the corner knife, but are well known in the art. Is omitted.

(Effect of embodiment)
In the edge stitch sewing machine 10, the operation control means 60 includes distances a and a ′ indicating the flap end position of the large presser 41 at the holding start position input by the setting switch 65 and the flap end planned position FP on the fabric. Based on the distances b and b ′ between the BP and the dart seams D1 and D2, an appropriate irradiation position of the slit light L2 of the point mark is obtained, and the point mark is irradiated. Then, by arranging the fabric C on the table 11 so as to align the dart seam D1 or D2 with the point mark, the flap end on the large press 41 and the flap end planned position of the fabric C are matched. Sewing can be performed.
Accordingly, appropriate sewing is realized by inputting the distance a or a ′ indicating the flap end position and the distance b or b ′ between the sewing target position FP and the dart seams D1 and D2 on the fabric. As a result, the positioning between the flap cloth F and the cloth C can be made unnecessary, and the workability can be improved. Furthermore, even when the design conditions and the planned sewing position of the flap cloth or the cloth are changed, it is possible to cope with the above simple input work, and it is possible to further improve the workability.

(Other)
Although the large presser feed mechanism 40 includes a pair of laying plates 47, the laying plate 47 is not an essential configuration. However, in the process of calculating the amount of displacement, since the large presser 41 is moved in a state where the fabric is not set below each large presser 41, the lower surface of each large presser 41 and the table 11 are damaged. In order to prevent the occurrence, it is desirable to apply an unnecessary cloth.

In the ball stitch sewing machine 10, the start and end of sewing and cutting in sewing are performed based on the end detection of the flap cloth F by the flap sensor 31, but the flap detection means 30 is not mounted, and the distance a , A ′, and distances b and b ′, the start and end of sewing and cutting may be determined based on the input values. For example, the control may be performed in which sewing is started after conveyance of a distance of a + b from the holding start position by the large presser 41 and sewing is ended after conveyance of a′−b ′ from the holding start position.
Further, if the length of the flap cloth is also inputted in advance by the setting switch 66, only the position a, the distance b or the position a ′, the distance b ′ may be inputted.

  In the said embodiment, when performing flap sewing, the case where the alignment reference position which a marking irradiation apparatus irradiates a point mark was installed in the dart (D1 or D2) formed in the fabric C was demonstrated to the example. However, it goes without saying that the reference mark formed on the fabric C may be used as the alignment reference position. In this case, the alignment reference position is set by the distance along the cloth feeding direction from the flap end planned position to the reference mark.

The perspective view which shows the schematic structure of the whole bead stitch sewing machine which is embodiment of invention is shown. The front view of a bead stitch sewing machine is shown. It is a perspective view of a large press feed mechanism. It is a block diagram which shows the control system of a bead stitch sewing machine. It is an enlarged plan view of the indicator means provided on the upper surface of the large presser. It is a top view which shows the positional relationship of the dart seam of the sewing machine frame in the front reference | standard, the cloth on a table, the sewing planned position, and a point mark. It is a top view which shows the positional relationship of the dart seam of the sewing machine frame in the front reference | standard, and the sewing end position of a cloth, and the flap end part position of the large presser in a holding start position. It is a top view which shows the positional relationship of the dart seam of the sewing machine frame in the back reference | standard, and the cloth on a table, the sewing position, and a point mark. It is a flowchart which shows the process based on the irradiation position control of an edge stitch sewing machine. It is a flowchart which shows the sewing process of a bead stitch sewing machine.

Explanation of symbols

10 Sewing machine 11 Table (work table)
13 Sewing needle 30 Flap detection means 31 Flap sensor (detection member)
33 Light source 35 Front positioning member 38 Rear positioning member 40 Large press feed mechanism (cloth movement mechanism)
41 Large presser 41c Reflective surface 45 Presser motor 55 Flap holding mechanism 60 Operation control means 61 CPU
62 ROM (initial position storage means)
62a Irradiation position control program (irradiation control means)
62b Sewing control program (sewing control means)
65 Setting switch (reference position setting means, contact position setting means)
70 Marking irradiation device 71 First marking light 72 Second marking light (light emitting part)
73 X-axis position adjustment motor (marking drive means)
D1, D2 Dart seam (alignment reference position)
C Cloth F Flap Cloth FP Sewing planned position

Claims (1)

A workbench for placing the fabric;
Sewing means having two sewing needles that move up and down and forming two seams parallel to the fabric;
A cloth moving mechanism that extends in the conveyance direction of the fabric and holds a pair of large pressers, and transports the large pressers from a holding start position of the fabric to a sewing position;
A light emitting unit for irradiating a point mark for indicating which position along the cloth feed direction of the workbench the alignment reference position for placing the fabric on the workbench should be adjusted, and the point mark A marking irradiation device having marking driving means for moving the irradiation position along the cloth feeding direction;
It has a contact part that makes the cloth feed direction end of the flap cloth sewn on the fabric contact on the large presser and positions it in the cloth feed direction, and can adjust the position along the longitudinal direction of the large presser. A positioning member disposed on the upper pressing upper surface;
A flap holding mechanism for holding the positioned flap cloth on the upper surface of the large presser;
Flap detecting means for detecting an end of the flap cloth conveyed by the large press;
In an edge stitch sewing machine comprising sewing start or end position determined by detection of the flap detection means, and sewing control means for controlling the cloth moving mechanism and the sewing means to sew a flap cloth on the cloth.
A reference position setting means for setting an alignment reference position of the cloth that irradiates the point mark by a distance along a cloth feed direction from an end of the cloth feed direction of the flap cloth sewn to the cloth;
A contact part position setting means for setting a contact part position along the cloth feeding direction of the contact part when the large presser is positioned at a holding start position of the fabric;
When irradiating the point mark to the set alignment reference position of the fabric, the cloth is a distance set by the reference position setting means from the contact portion position set by the contact portion position setting means. An edge stitch sewing machine comprising: an irradiation control unit that controls the marking driving unit so as to irradiate a point mark at a position separated in a feeding direction.

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