JP5059688B2 - Sewing sewing machine - Google Patents

Description

  The present invention relates to an edge stitch sewing machine that can be used by exchanging a plurality of large pressers having different lengths in the cloth feeding direction.

In the edge stitch, the ball cloth is sewn like a valve that closes the opening of a square open pocket. Further, in ball edge stitching, a flap fabric that hangs down from a gap in a ball cloth that closes a pocket opening like a valve is often sewn.
The bead stitch sewing machine is a sewing machine for performing the above-described bead stitching, and holds a flap mechanism on the large presser mechanism and a large presser mechanism having a pair of large pressers that hold the body cloth on the mounting table together with the ball cloth. Flap holding mechanism, large presser feed mechanism that transports the large presser mechanism along the sewing direction (cloth feed), sewing means that performs sewing on the transported fabric, and a large amount along the fabric feed direction of the fabric And a flap sensor that detects reflected light from the reflecting surface formed on the upper surface of the presser (see, for example, Patent Document 1).

By the way, the sewing length of the edge stitches varies depending on the size of the opening of the pocket (width in the sewing direction). When the size of the opening changes, the size of the flap cloth (the width in the sewing direction) also changes. For this reason, in the large presser mechanism and flap holding mechanism (standard specification) to cope with a general pocket size, a flap holding mechanism that holds the flap cloth when the stitch length of the edge stitch is long, etc. The length of the sewing direction (cloth feeding direction) of the large presser that becomes the foundation may be insufficient. Therefore, the large presser mechanism and flap holding mechanism are unitized to provide a large presser unit with a large presser mechanism and flap holding mechanism that can sew a large pocket. An edge stitch sewing machine that can be exchanged with a unit is known.
JP 2007-077772 A

By the way, each large presser unit is provided with parameters such as the appropriate two-needle width and the maximum sewing length, and the parameters for each type of large presser unit are stored in the control device that controls the sewing. ing. In other words, when performing ball edge sewing, it is necessary to perform sewing using parameters according to the type of large presser unit attached at that time.
However, in the conventional ball stitch machine, it is necessary to manually set the above parameters. For this reason, when the operator replaces the large holding unit with a different type of unit and forgets to set the parameter to a parameter corresponding to the large holding unit after replacement, the large holding unit and the parameter will not be compatible. In this case, there has been a problem that an error occurs during the sewing work and the sewing work is interrupted, so that the work efficiency is lowered, or the sewing quality is lowered when sewing is performed with an incorrect setting.

  In view of the above-described problems, an object of the present invention is to provide an edge stitch sewing machine that does not cause a problem associated with a change in length of a large presser.

  The invention according to claim 1 is provided in a pair of left and right large presses for holding the body cloth on the mounting table together with the ball cloth, and at least one of the large pressers, and holds the flap cloth on the upper surface of the large presser. A flap holding mechanism, a cloth feed mechanism for transferring the pair of large pressers along a predetermined cloth feed direction, and an upper surface of at least one large press provided with the flap holding mechanism are formed along the cloth feed direction. In addition to irradiating light to the reflection part for detecting the flap end part and the reflection part, the reflected light is received and the end part of the flap cloth is detected by a change in the detection state of the reflected light by the flap cloth. A plurality of flaps having different lengths in the direction along the cloth feeding direction can be exchanged with respect to the cloth feeding mechanism. In a stitch stitch sewing machine that sews with one pair of large pressers attached to the cloth feed mechanism, on the reflective part of each large presser or on the extension line of each large presser, corresponding to the length of each large presser in the cloth feed direction A size discriminating section for generating different detection patterns of reflected light, storage means for storing correspondence data indicating the correspondence between each detection pattern and the length of the large presser, and the reflected light of the flap sensor And determining means for determining the length of the large press from the detection pattern and the corresponding data.

  According to the first aspect of the present invention, there is provided a size identifying unit that generates a detection pattern of reflected light that differs depending on the length of the large presser in the cloth feeding direction on the reflective portion of each large presser or an extension line of the reflective unit. Is provided. As a result, the detection pattern of the reflected light by the flap sensor differs depending on the length of the large press attached to the cloth feed mechanism at that time. Further, the storage means stores correspondence data indicating the correspondence between each detection pattern and the length of the large presser, and the discrimination means determines the length of the large presser from the detection pattern of the reflected light by the flap sensor and the corresponding data. Determine. That is, the determination means automatically determines the length of the large press from the detection pattern of the flap sensor. Therefore, for example, various settings of the edge stitch sewing machine that need to be changed depending on the length of the large presser are automatically set according to the length of the large presser according to the determination result of the determining means. Therefore, it is possible to always set the ball stitching sewing machine appropriately according to the length of the large presser. Therefore, it is possible to eliminate the conventional problem of lowering work efficiency due to interruption of the sewing work due to an error occurring during the sewing work without conforming to the length of the large presser and the setting of the edge sewing machine. The work efficiency is greatly improved. In addition, it is possible to solve the conventional problem that the sewing quality is deteriorated by performing the sewing with an incorrect setting, and the sewing quality is greatly improved.

(Sewing edge)
A bead stitch sewing machine 10 according to the present embodiment described below is a sewing machine for performing bead stitching. First, the edge stitching will be described with reference to FIG. FIG. 1 is a plan view showing a state immediately after sewing of the edge stitch.
The edge stitch is a sewing method for forming the opening of the pocket. The pocket opening has a rectangular shape and a parallelogram shape. Here, the rectangular shape is described as an example. To do.

The ball edge stitching is formed by placing the ball cloth T on the surface of the body cloth C, placing the flap cloth F thereon, and stitching it together with the two stitches N and N. Further, a straight cut L is formed between the two stitches N, N in parallel with the stitches N, N, and V-shaped cuts V, V are formed at both ends of the straight cut L. Is formed.
The flap cloth F has one side edge portion sewn to the body cloth C together with the ball cloth T by one seam N.
The V-shaped cuts V and V are formed so as to coincide with a line segment connecting the end of the straight cut L and the ends of the two seams N and N.
Then, as shown in FIG. 1, the seam N and the cuts L and V are formed, and the ball cloth T is folded from the cuts L and V to the back side of the body cloth C, and the flap cloth F is indicated by a two-dot chain line. In the state where the seam N is inverted about the axis, the pocket hangs outward from the opening of the pocket.
The lengths of the seams N and N and the cut line L and the width in the direction along the seam N of the flap cloth F are determined according to the size of the opening of the pocket.

(Overall configuration of the embodiment of the invention)
Hereinafter, a bead stitch sewing machine 10 according to an embodiment of the present invention will be described with reference to FIGS. FIG. 2 is a perspective view showing an overall schematic configuration of the edge stitch sewing machine 10, and FIG. 3 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 is determined based on 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 rim stitch sewing machine 10 according to the present embodiment overlaps the body cloth C and the ball cloth T and sews them at a predetermined length with the two sewing needles 13 and 13, and between the two stitches N and N. Is a sewing machine that forms a linear cut L along the sewing direction, and further forms V-shaped cuts V and V at both ends of the cut L. Further, when sewing the body cloth C and the ball cloth T, the flap cloth F is also sewn on the body cloth C on one of the two needles 13 and 13. The edge stitch sewing machine 10 has a plurality of large pressers having different lengths in the X-axis direction of large pressers 41A and 41B, which will be described later, and attaches one of the large pressers to the large press unit 40 for sewing. A sewing machine to perform.
The edge stitch sewing machine 10 includes a body cloth C on the table 11 by a table 11 as a mounting table as a sewing work table and a pair of left and right large pressers 41A and 41B extending in the cloth feeding direction of the body cloth C. Is held together with the ball cloth T and the large pressers 41A and 41B are moved in the cloth feed direction E, so that the body cloth C, the ball cloth T and the flap cloth F are conveyed, and the large presser unit 40. A pair of left and right flaps that hold the cloth feed mechanism 25 that transports the cloth in the cloth feed direction and the flap cloth F that is sewn to the body cloth C by the placement portions 41a and 41a provided on the upper surfaces of the large pressers 41A and 41B. A mechanism 55, 55, a binder mechanism in which the binder 12 is applied to the garment T sewn on the body cloth C and the both side edges of the garment T are folded back, and the large pressing unit 40 The needle up / down movement mechanism 70 as a sewing means for sewing the body cloth C and the ball cloth fed along the direction with the two sewing needles 13 and 13 and the downstream of the sewing needles 13 and 13 in the cloth feeding direction. A knife mechanism as a center knife that raises and lowers the knife 14 to form a cut L in the body cloth C and the ball cloth, a hook mechanism that catches the sewing thread from the sewing needle 13 and entangles the lower thread, and is installed on the table 11. A sewing machine frame 80 for storing and holding the needle up-and-down moving mechanism 70 and the knife mechanism, a corner knife mechanism 90 for forming substantially V-shaped cuts V and V at positions corresponding to both ends of the straight cut, and a body cloth C A light emitting unit that irradiates light toward the reflecting surfaces 41c and 41c formed on the upper surfaces of the placement portions 41a and 41a of the large pressers 41A and 41B along the cloth feeding direction E and the reflection from the reflecting surfaces 41c and 41c. Receiver that receives light Each of the flap sensors 30, 30 as a pair of left and right flap end sensors for detecting the front end and the rear end of the flap cloth F by increasing or decreasing the amount of reflected light received by the light receiving unit, An operation control device 60 that performs operation control of the configuration is provided. 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 cloth feed mechanism 25 and a corner knife mechanism 90 in which the large presser unit 40 is mounted on the downstream side in the cloth feed direction of the sewing machine frame 80, and a binder mechanism (binder) on the upstream side in the cloth feed direction. (Other than 12 are not shown).

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 rotating drive force transmitted from the sewing machine motor 16 to the sewing machine frame 80 via a belt (not shown) is transmitted to the hook mechanism inside the bed portion 81. The shaft is supported in a state along the Y-axis direction, and an upper shaft that transmits the vertical movement driving force of the needle vertical movement mechanism 70 from the sewing machine motor 16 is provided in the arm portion 83 along the Y-axis direction. It is supported.
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)
FIG. 4 is a perspective view of the needle vertical movement mechanism 70. The needle up-and-down movement mechanism 70 includes two needle bars 72 and 72 that individually hold the sewing needles 13 and 13 at the lower end, a support frame 79 that supports the needle bars 72 and 72 so as to be movable up and down, and two A needle bar holder 74 that simultaneously holds the needle bars 72, 72, a sewing machine main shaft 76 that is rotationally driven by the sewing machine motor 16, a rotary weight 77 that is fixedly connected to one end portion of the sewing machine main shaft 76, and that rotates. A crank rod 78 having one end connected to a position eccentric from the rotation center of the weight 77 and the other end connected to a needle bar holder 74 is provided.

The sewing machine main shaft 76 is also supported so as to be rotatable along the Y-axis direction inside the arm portion 83, and a rotational driving force of full rotation is applied by the sewing machine motor 16. When the sewing machine main shaft 76 is rotated, the rotary weight 77 rotates in the same manner, and one end portion of the crank rod 78 performs a circular motion around the sewing machine main shaft 76, and the other end portion has a circular motion Z on one end side. Only the moving component in the axial direction is transmitted to the needle bar holder 74 so that the needle bars 72 and 72 reciprocate up and down.
The sewing needles 13 and 13 are provided so that the attachment positions in the Y-axis direction with respect to the needle bars 72 and 72 can be adjusted. By adjusting the attachment positions, the needle widths of the sewing needles 13 and 13 can be adjusted. It is possible. Also, the needle width can be changed by exchanging the sewing needles 13 and 13. Since the interval between the stitches N and N of the edge stitch (position in the left-right direction in FIG. 1) is determined by the needle width, the needle width is set in accordance with the interval between the stitches N and N of the sewing operation performed at that time. . When changing the needle width, the needle plate 15 is replaced with one having a needle hole corresponding to the needle width.

(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 14 a 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. 3).
The knife motor 17 is driven to rotate together with the body cloth C feeding operation, 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 has 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, each hook gear individually And a transmission gear for applying a rotational 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 13 when the tip of the sewing needle 13 is lowered to the lower side of the needle plate 15, and rotates in the caught state so that the loop of the sewing thread passes through the horizontal hook. Insert the bobbin thread and tie the sewing thread and bobbin thread. In this way, the sewing is performed by the cooperation of the sewing needle 13 and the horizontal hook. In other words, the needle up / down movement mechanism 70 and the shuttle mechanism constitute sewing means.

(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. 8) 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.
Then, at the time of cloth setting and sewing, the binder mechanism causes the binder 12 to move immediately before the needle drop position along the cloth feed direction in which the tip of the binder 12 passes the needle drop position of the two needles 13 and 13 by the air cylinder. Is lowered and the ball cloth is bent along the binder 12 and set with the cloth. When the cloth is fed after the start of sewing, a pair of large pressing members 41A and 41B of the large pressing unit 40 described later are moved in the cloth feeding direction while the binder 12 is fixed at the lowered position. Then, the ball cloth T is sent out in the longitudinal direction in a state of being folded along the binder 12, so that the ball cloth T is removed from the binder 12 and the body cloth C is sewn.

(Large holding unit)
FIG. 5 is a perspective view of the large pressing unit 40. As shown in this figure, the large presser unit 40 includes a pair of large pressers 41A and 41B for pressing the body cloth C from above at both sides of the sewing needle 13, and individually below each large presser 41A and 41B. Two laying plates 47 (see FIG. 2) on which the body cloth C is placed and placed when the cloth is fed, a pair of arm members 48 that individually hold the large pressers 41A and 41B, and two large pressers A support 42 that supports 41A and 41B via an arm member 48 so as to be movable up and down, and a distance between large pressers 41A and 41B that can adjust the position of each arm member 48 held by the support 42 along the Y-axis direction. An adjustment mechanism 49, an air cylinder 43 that moves the large pressers 41A and 41B up and down with respect to the support 42, and an electromagnetic valve 44 (see FIG. 5) that controls driving of the air cylinder 43 are provided. .

Each of the large pressers 41A and 41B 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 41A and 41B 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.
Further, each large presser 41A, 41B is composed of a top plate and a bottom plate, and each large presser 41A, 41B is provided with a gap opened toward the other large presser side. In the gaps between the large pressers 41A and 41B, presser plates 50 and 50 that can be moved back and forth are stored. The holding plates 50, 50 of the large pressers 41 </ b> A, 41 </ b> B can be reciprocated along air contact directions (Y-axis direction) by air cylinders 51, 51 provided on each arm member 48. . The air cylinders 51 and 51 are driven by electromagnetic valves 52 and 52 (see FIG. 5) controlled by the operation control device 60, and the holding plates 50 and 50 are moved closer to each other to make the above-described ball cloth. Both ends can be folded so as to be wound around the binder 12, and the state can be maintained.

In addition, the upper surfaces of the large pressers 41A and 41B function as a placing portion 41a for placing the flap cloth, and long reflecting surfaces 41c and 41c as “reflecting portions” over the entire length in the longitudinal direction. Is formed. The reflection surfaces 41c and 41c are used for detecting the upstream end position and the downstream end position of the flap cloth F held in a flap holding mechanism 55 described later in the cloth feeding direction. FIG. 6 is a plan view showing a state in which the flap cloth F is set on the placement portion 41a on the upper surface of the large presser 41A. As shown in FIG. 6, when a part of the reflective surface 41 c in the longitudinal direction is shielded by the flap cloth F, the flap sensor 30 detects a decrease in the reflectance of the shielded part, whereby the cloth of the flap cloth F is detected. The operation control device 60 recognizes the upstream end (rear end) position and the downstream end (front end) position in the feed direction.
Further, a size identifying portion 41d (41e) described later is provided on the reflection surface 41c provided on the large presser 41A (see FIG. 7).

  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 moved up and down by the air cylinder 43. As a result, each arm member swings to move up and down the large pressers 41A and 41B. It has become.

  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 41A, 41B can be adjusted to an arbitrary position in the Y-axis direction via each arm member 48, and the distance between each large presser 41A, 41B can also be adjusted.

Each laying plate 47 is fixedly equipped on the support 42 while being placed on the upper surface of the table 11 below the large pressers 41A and 41B, and moves along the cloth feed direction E together with the large pressers 41A and 41B. I do. Each laying plate 47 extends along the X-axis direction and is set to have approximately the same width as the large pressers 41A and 41B 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 the large pressers 41 </ b> A and 41 </ b> B are lowered to hold the body cloth C in a sandwiched state. In other words, each laying plate 47 is provided on the lower side of the body cloth C and protects it from sliding on the upper surface of the table 11 when the body cloth C is conveyed.

  In the air cylinder 43, the large pressers 41A and 41B can be switched between the upper position and the lower position via the arm members 48 by the electromagnetic valve 44. The large pressers 41 </ b> A and 41 </ b> B are lowered to the height of the upper surface of the laying plate 47 at the lower position. The operation of the solenoid valve 44 of the air cylinder 43 is controlled by the operation control device 60.

(Flap holding mechanism)
As shown in FIG. 5, the flap holding mechanism 55 is individually provided on each upper surface corresponding to each large presser 41 </ b> A, 41 </ b> B so that the flap cloth is held on the upper surface of one of the large pressers 41. Yes. Each flap holding mechanism 55 includes a flap pressing member 56 that is pivotally supported by the arm member 48 so as to be able to come into contact with and away from the upper surfaces of the large pressing members 41A and 41B, and an air cylinder 57 that applies rotational force to the flap pressing member 56. Thus, the flap cloth F is held and released.
The flap holding mechanism 55 is for holding the sewing end portion of the flap cloth F in a state along the X-axis direction, and the sewing end portion of the flap cloth F is provided with the large pressers 41A and 41B. The flap cloth F is held so as to pass the needle drop position of one of the sewing needles 13 during the movement of. Then, the flap cloth F covers the reflective surface 41c of the large pressers 41A and 41B (the reflective surface 41d for the large presser 41A) from the top over the entire length in the longitudinal direction of the flap cloth F. It is supposed to be retained.
The flap holding mechanism 55 is individually provided for each of the large pressers 41A and 41B, but only one of them is selected and used during the sewing operation of the flap cloth F.

  The large presser unit 40 includes large pressers 41A and 41B, placement portions 41a and 41a, presser plates 50 and 50, two floor plates 47 and 47, flap pressing members 56 and 56, and reflection surfaces 41c and 41c in the X-axis direction. There are two units with different lengths. One is a large presser unit with a length (standard specification) that corresponds to the edge stitching at the opening of a general garment pocket, and the other is for stitching a pocket with a large opening that cannot be accommodated by the standard specification. It is a large presser unit with a length (long specification) to accommodate it. In addition, in the following description, “C” is added to the long-sized large presser unit and the respective components thereof. In addition, a size identification portion 41d (see FIG. 7A), which will be described later, is provided on the reflection surface 41c of the large presser 41A of the standard large presser unit 40, and the reflective surface of the large presser 41CA of the long presser unit 40C. A size identifying unit 41Ce (see FIG. 7B) is provided in 41Cc.

(Cloth feed mechanism)
The cloth feed mechanism 25 includes a mounting member 26 to which the support 42 of the large pressing unit 40 is mounted, a pressing motor 27 as a driving unit that moves the mounting member 26 along the X-axis direction, and rotational driving of the pressing motor 27. And a timing belt 28 that converts the force into a linear drive force along the X-axis direction and transmits the converted force to the mounting member 26.
An upper portion of the mounting member 26 is provided so that the support 42 of the large pressing unit 40 can be mounted, and a lower portion thereof is fixedly supported by the timing belt 28.
The timing belt 28 is a belt provided so as to connect the rotating shaft of the pressing motor 27 and the support shaft 24 provided on the upstream side (left side in FIG. 3) of the pressing motor 27. The lower end portion of the mounting member 26 is fixedly supported at a predetermined position on the outer peripheral portion. The timing belt 28 transmits the movement of the pressing motor 27 in the X-axis direction to the mounting member 26, so that the large pressing unit 40 mounted on the mounting member 26 can be arbitrarily positioned in the X-axis direction. .

(Flap sensor)
The flap sensors 30 are individually provided corresponding to the large pressers 41A and 41B, 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 sensors 30 is provided above the movement path of each large presser 41A, 41B and upstream of the two needles 13 in the cloth feeding direction (right side in FIG. 3).
Each flap sensor 30 detects the reflected light of the light emitting element 33 which irradiates irradiation light from vertically above toward the reflection surface 41c of the large pressers 41A and 41B described above, and the reflected light of the irradiation light from the reflection surface 41c, and outputs a detection signal. A light receiving element 31 that inputs to the operation control device 60 and a support bracket 32 that supports the light receiving element 31 on the outer surface of the sewing machine arm portion 83 are provided. The light emitting element 33 and the light receiving element 31 are integrally stored in the same container.
The support bracket 32 supports the light receiving element 31 and the light emitting element 33 above the reflecting surface 41c of the large pressers 41A and 41B with the light receiving element 31 and the light emitting element 33 facing downward. When the light irradiated by the light emitting element 33 is irradiated onto the reflection surface 41 c, the irradiation light is reflected by the reflection surface 41 c and detected by the light receiving element 31. At this time, when the end of the flap cloth F enters the irradiation range of the irradiation light of the light emitting element 33, the light pattern detected by the light receiving element 31 changes due to the reflection surface 41 c being blocked by the flap cloth F. The light receiving element 31 detects the end of the flap cloth F by the change in the light pattern and inputs a detection signal to the operation control device 60. The light receiving element 31 inputs an OFF signal to the operation control device 60 when light is detected and ON when no light is detected.
In addition, the pattern of light detected by the light receiving element 31 is also changed by size identifying units 41d and 41e described later. The light receiving element 31 detects the size identifying unit 41d or 41e by ON / OFF caused by the change in the light pattern and inputs a detection signal to the operation control device 60.

(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 pressers 41A and 41B by the large presser unit 40 (left side in FIG. 3). The body cloth C conveyed to the working position of the corner knife 91 by the large pressing unit 40 is penetrated through the corner knife 91 from below to form substantially V-shaped cuts V at positions corresponding to both ends of the straight cut.
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.
That is, when the body cloth C and the ball cloth T in which the seam and the linear cut are formed are conveyed by the large pressing unit 40 to a predetermined position on the downstream side of the moving knife 14 in the cloth feeding direction E, the corner knife 91 is positioned and raised at a lower position on one end side of the cut, and then the corner knife 91 is positioned and raised at a lower position on the other end side of the cut to form two V-shaped cuts V.

(Size identification part)
Next, the size identification unit will be described in detail. FIG. 7 is a top view of the large pressers 41A and 41B. 7A shows the large pressers 41A and 41B of the standard large presser unit 40, and FIG. 7B shows the large pressers 41CA and 41CB of the long presser unit 40C.
As shown in FIG. 7A, a size identifying portion 41d is provided on the reflection surface 41c provided on the large presser 41A of the standard large presser unit. The size identifying portion 41d is three shielding portions provided in the Y-axis direction near the upstream end (right side in FIG. 3) of the large presser 41A on the reflective surface 41c. A striped pattern of books is formed. The shielding part hardly reflects the light emitted by the light emitting element 33 of the flap sensor 30. For this reason, when the flap sensor 30 is located above the shielding part, light detection by one light receiving element 31 provided above the large press 41A of the flap sensor 30 is not performed. That is, when the large presser unit 40 is conveyed in the cloth feeding direction by driving the cloth feeding mechanism 25 and the flap sensor 30 passes over the size identification part 41d, no light is detected by the light receiving element 31 by the three shielding parts. The timing, that is, the ON timing occurs three times.
On the other hand, as shown in FIG. 7B, a size identifying portion 41Ce is provided on the reflection surface 41Cc provided on the large presser 41CA of the long presser large press unit. The size identification part 41Ce is two shielding parts provided in the Y-axis direction on the reflective surface 41c and in the vicinity of the upstream end (right side in FIG. 3) of the large presser 41A, and 2 on the reflective surface 41c. A striped pattern of books is formed. When the large presser unit 40 is conveyed in the cloth feeding direction by driving the cloth feeding mechanism 25 and the flap sensor 30 passes over the size identification part 41Ce, the timing at which the light receiving element 31 is turned ON by the two shielding parts is 2 Occur times.
As described above, the number of times the light is not detected by the light receiving element 31 of the flap sensor 30 differs depending on the large pressing unit attached to the cloth feeding mechanism 25. ON / OFF of the light receiving element 31 is input to the operation control means 60, and the operation control means 60 determines the large pressing unit from the number of times the light receiving element 31 is turned ON.

  The large presser unit 40 (40C) attached to the cloth feed mechanism 25 is located upstream of the flap sensor 30 (left side in FIG. 3) before the start of the sewing work, When the start switch 66 (see FIG. 8) is turned on and the sewing data 69a, which will be described later, is selected by the operator, the operation control device 60 moves the movement memory 20 in the downstream direction (right side in FIG. 3) and the operator moves the fabric. The large pressing unit 40 (40C) is moved to a position where setting can be performed. That is, the reflection surface 41c (41Cc) provided on the large pressing unit 40 (40C) has the support portion 42 (42C) from the distal end side (the lower side in FIG. 7) of the large pressing members 41A and 41B (41CA and 41CB). Light is emitted from the light emitting element 33 of the flap sensor 30 sequentially toward the provided side (upper side in FIG. 7), and ON / OFF detection by the light receiving element 31 is performed.

(Control system for hem stitch machine)
Next, the configuration related to the control system of the edge stitch sewing machine 10 will be described in detail. FIG. 8 is a block diagram showing a control system of the edge stitch sewing machine 10. As shown in this figure, the operation control device 60 includes a display panel 64 for displaying various control status information, a setting switch 65 for inputting various settings relating to sewing, and an activation switch 66 for inputting the start of sewing. 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. When the start switch 66 is input, an input by the operation pedal 68 is possible.
When the operation pedal 68 is depressed after the start switch 66 is input, the large pressers 41A and 41B are fed in the direction of arrow E, and the sewing operation is performed on each part of the edge stitch sewing machine 10 in the sewing control mode. Is an instruction input means for executing. That is, sewing can be executed through the two-step operation of the start switch 66 and the operation pedal 68 described above.

In the operation control device 60, the sewing machine motor 16, the presser motor 45, the knife motor 17, the corner knife drive motor 94, and the needle switching solenoid 73 to be controlled are provided with drivers 16a, 45a, 17a, 94a, 73a, respectively. Connected through.
The operation controller 60 includes an air cylinder that moves the binder 12 up and down, an air cylinder 43 that raises and lowers the large pressers 41A and 41B (41CA and 41CB), an air cylinder 51 that operates the presser plate 50, and a flap cloth F. Electromagnetic valves 18, 44, 52, 58, 93, 20 for controlling the operation of the air cylinder 57 for holding, the air cylinder 92 for raising and lowering the corner knife 91, and the air cylinder for switching between the standby state and the usable state of the moving knife 14. Are connected via drivers 18a, 44a, 52a, 93a, 20a.
Furthermore, each light emitting element 33 (only one is shown in FIG. 8) of the pair of flap sensors 30 is connected to the operation control device 60 via a power supply circuit 33a, and each light receiving element 31 (one in FIG. 8). Are connected via the interface 31a.
Further, the operation control device 60 includes a large presser 41A for detecting a detected portion (not shown) provided at the downstream end of the support base 42 (42C) of the large presser unit 40 (40C) in the cloth feeding direction. An origin sensor 19 (19C) of 41B (41CA, 41CB) is connected via an interface 19a. The origin sensor 19 (19C) is arranged to detect the detected portion when the large pressers 41A and 41B (41CA and 41CB) are conveyed to the end point near the end of the cloth feeding direction or close to the end point. Uses the detected position as an origin and counts the rotation angle of the pressing motor 45 from the detected position to obtain the position after the movement of the large pressers 41A, 41B (41CA, 41CB).

  The motion control device 60 includes a CPU 61 that performs various controls, a ROM 62 that stores a size identification program 62a, which will be described later, a RAM 63 that stores various data related to the processing of the CPU 61 in a work area, and the CPU 61 that has a stitch stitch sewing machine 10. And an EEPROM 69 as storage means for storing various setting data for performing various operation controls in a rewritable manner.

  In the EEPROM 69, the relative positional relationship of the light receiving elements 31, 31, the sewing needle 13, and the moving knife 14 in the cloth feeding direction, and the irradiation positions of the light emitting elements 33, 33 on the reflecting surfaces 41a, 41c in the Y-axis direction. The positional relationship is stored as position data. In addition, when the front end portion (downstream end portion in the fabric feed direction) and the rear end portion (upstream end portion in the fabric feed direction) of the flap cloth F are detected by the light receiving element 31, the CPU 61 refers to the position data. Determine how much distance from the end detection is conveyed before starting or ending sewing, and similarly determine how much distance is conveyed from the start of sewing to start or end cloth cutting. .

  The EEPROM 69 stores discrimination data 69a for discriminating the large pressing unit from the difference in presence or absence of detection of the light of the light receiving element 31 of the flap sensor 30 generated by the size identification units 41d and 41Ce. The determination data 69a is data in which the detection pattern (ON / OFF) of the presence or absence of light by the light receiving element 31 is associated with the type of the large pressing unit. The discrimination data 69a associates the detection pattern in which the light receiving element 31 is turned on three times with the standard large pressing unit 40, and the detection pattern in which the light receiving element 31 is turned on twice and the long pressing large pressing unit 40C. Yes.

The EEPROM 69 stores sewing data 69a. The sewing data 69a includes at least data indicating the stitch length of the stitches N and N and the interval between the stitches N and N (position interval in the left-right direction in FIG. 1). The CPU 61 reads the sewing data 69a when performing the control for the edge stitch sewing, and controls the operation of each part of the edge stitch sewing machine 10 based on the stitch lengths of the stitches N and N of the sewing data. Note that a plurality of sewing data 69a having various data depending on various sewing conditions such as the opening of the pocket and the presence or absence of the flap cloth F is stored in the EEPROM 69, and any one of the plurality of sewing data 69a is stored in the operator. Selected by. The selection of the sewing data 69a is performed by operating the setting switch 65.
Further, the EEPROM 69 stores individual sewing parameters 69b set for each type of the large presser units 40 and 40C. The sewing parameter 69b includes at least parameters indicating the needle width in the Y-axis direction of the respective sewing needles 13 and 13 and the maximum length of the stitch lengths of the stitches N and N. The needle width corresponding to the standard large presser unit 40 included in the sewing parameter 69b is 8 to 20 [mm], and the maximum sewing length is 220 [mm] or less. The corresponding needle width is 20 to 32 [mm], and the maximum sewing length is 250 [mm] or less.

(Size identification program)
Next, the size identification program 62a will be described in detail. The CPU 61 executes the size identification program 62a so that the large presser unit 40 attached to the cloth feed mechanism 25 is standardized from the detection pattern input from the light receiving element 31 and the determination data 69a stored in the EEPROM 69. It is determined whether it is a specification or a long specification.
As described above, when the start switch 66 of the edge stitch sewing machine 10 is turned on and the sewing data 69a described later is selected by the operator, the operation control device 60 moves the movement memory 20 in the downstream direction, and the operator moves the fabric. The large pressing unit 40 is moved to a position where setting can be performed. At this time, the CPU 61 calls the size identification program 62a and stands by. After that, when a detection pattern is input from the flap sensor 30 and the detection pattern is a detection pattern that is turned ON three times, the detection pattern is determined to be the standard large press unit 40, and the detection pattern is turned ON twice. If it is, the large presser unit 40C is identified.
Therefore, the CPU 61 functions as a “discriminating unit” by executing the size identification program 62a. The EEPROM 69 that stores the discrimination data 69a functions as a “storage unit”.

When the type of the large pressing unit is determined by the size identification program 62a, the CPU 61 displays on the display panel 64 the length of the large pressing unit.
Further, the CPU 61 reads the sewing parameter 69b according to the type of the large presser unit 40 (40C) determined by the execution processing of the size identification program 62a, and performs various comparison processes with the sewing data as described above. The CPU 61 compares the interval between the stitches N and N of the sewing data 69a with the needle width of the sewing parameter 69b. If the interval between the stitches N and N of the sewing data 69a is not within the range of the stitch width of the sewing parameter 69b, an error is output. Outputs the edge stitch sewing machine 10 to stop. Further, the CPU 61 compares the sewing length of the sewing data 69a with the maximum sewing length of the sewing parameter 69b, and if the sewing length of the sewing data 69a exceeds the maximum sewing length of the sewing parameter 69b, an error is generated. Outputs the edge stitch sewing machine 10 to stop.

(Ball edge sewing machine operation)
Next, the operation of the edge stitch sewing machine 10 will be described in detail with reference to the flowcharts of FIGS. FIG. 9 is a flowchart showing the operation of the bead stitching sewing machine 10, FIG. 10 is a flowchart showing the operation of the bead stitching sewing machine 10 in the standard sewing process, and FIG. 11 is a flowchart showing the operation of the bead sewing machine 10 in the long sewing process. It is a flowchart which shows operation | movement.
When the start switch 66 of the edge stitch sewing machine 10 is turned on (step S1), the CPU 61 of the operation control device 60 initializes each part of the edge stitch sewing machine 10. By the initialization, the cloth feeding mechanism 25 moves the large pressing unit 40 (40C) to the upstream side (left side in FIG. 3) from the flap sensor 30. Thereafter, the sewing data 69a is selected by the operator, and the CPU 61 reads the selected sewing data 69a (step S2).

  After step S2, the CPU 61 drives the presser motor 27 of the cloth feed mechanism 25 to move the large presser unit 40 (40C) in the downstream direction (right side in FIG. 3) (step S3). At this time, ON / OFF detection by the flap sensor 30 is also started. Thereafter, when the size identifying unit 41d (41Ce) moves from the upstream side to the downstream side with the movement of the large pressing unit 40 (40C), the light receiving element is blocked by the shielding unit of the size identifying unit 41d (41Ce). 31 is turned on (step S4: YES), and a detection pattern of the number of times of ON corresponding to the number of shielding parts of the size identification part 41d (41Ce) is input (step S5). The CPU 61 calls and executes the size identification program 62a, reads the determination data 69a, and determines the type of the large pressing unit 40 (40C) from the ON number and the determination data 69a input in step S5 (step S6). . Specifically, when the number of times of ON is 3, the standard specification large pressing unit 40 is determined, and when the number of ON times is 2, the long specification large pressing unit 40C is determined. At this time, display corresponding to the length of the large press according to the determination result is performed on the display panel 64. Thereafter, when the cloth feeding mechanism 25 moves the large pressing unit 40 (40C) to the end point (the cloth setting position by the operator) (step S7: YES), the movement of the large pressing unit 40 (40C) by the cloth feeding mechanism 25 is completed. (Step S8).

  Thereafter, the CPU 61 reads the sewing parameters 69b corresponding to the types of the large presser units 40 and 40C determined in step S6. Specifically, it is determined whether or not the large presser unit 40 of the standard specification (step S9). If it is the standard specification, the sewing parameters of the standard specification are read (step S10). In the case of the presser unit 40C, the long sewing parameters are read (step S11). Thereafter, the body cloth C, the ball cloth T and the flap cloth F are set by the operator, and when the operation pedal 68 is depressed and turned on (step S12), a sewing process according to the type of the large pressing units 40 and 40C is performed. . Specifically, when the standard large presser unit 40 is used, the standard specification sewing process is performed (step S13), and when the long standard large presser unit 40C is used, the long specification sewing process is performed (step S13). Step S14). When either one of the sewing processes shown in step S13 or step S14 ends, the operation of the sewing machine ends.

Next, processing contents of the sewing processing corresponding to the types of the large presser units 40 and 40C will be described in detail. First, the standard specification sewing process shown in step S13 will be described in detail with reference to FIG.
First, the CPU 61 determines whether or not the sewing length setting of the sewing data 69a is 220 [mm] or less (step S21). If not, that is, if it exceeds 220 [mm] (step S21: NO), An error is output (step S29). If the sewing length is 220 [mm] or less (step S21: YES), the CPU 61 determines whether the needle width of the sewing data 69a is within the range of 8 to 20 [mm] (step S22). (Step S22: NO), an error is output (step S29). The determination in step S21 and step S22 is performed by comparing the sewing length and needle width of the sewing data 69a with the sewing length and needle width of the sewing parameter 69b.
When the needle width of the sewing data 69a is within the range of 8 to 20 [mm] in step S22 (step S22: YES), the CPU 61 drives the presser motor 27 of the cloth feed mechanism 25 to increase the large presser unit 40. Is started in the direction of arrow E (step S23). Thereafter, when the large presser unit 40 is located at the sewing start position, the CPU 61 drives the sewing machine motor 16 to operate the needle up-and-down moving mechanism 70 and the shuttle mechanism to perform the sewing operation (step S24). Further, after starting the sewing operation in step S24, the CPU 61 drives the knife mechanism (step S25) to form a linear cut L in the body cloth C and the ball cloth T. Thereafter, when the sewing operation in step S24 and the operation of the knife mechanism in step S25 are completed, the CPU 61 determines the position where the V-shaped cuts V and V are applied to the body cloth C and the ball cloth T of the corner knife 91 of the corner knife mechanism 90. It is moved upward, the air cylinder 92 of the corner knife mechanism 90 is driven to operate the corner knife 91 (step S26), and V-shaped cuts V and V are made. Thereafter, the CPU 61 moves the large presser unit 40 to the end position (step S27) and stops the operation of the sewing machine (step S28). This completes the standard sewing process. Note that the end position of step S27 is the same position as the position before the start of sewing.

Next, the long specification sewing process shown in step S14 will be described in detail with reference to FIG.
First, the CPU 61 determines whether the sewing length setting of the sewing data 69a is 250 [mm] or less (step S31). If not, that is, if it exceeds 250 [mm] (step S31: NO), An error is output (step S29). When the sewing length is 250 [mm] or less (step S31: YES), the CPU 61 determines whether the needle width of the sewing data 69a is within the range of 20 to 32 [mm] (step S32). (Step S32: NO), an error is output (step S29). The determination in step S31 and step S32 is performed by comparing the sewing length and needle width of the sewing data 69a with the sewing length and needle width of the sewing parameter 69b.
When the needle width of the sewing data 69a is within the range of 20 to 32 [mm] in step S32 (step S22: YES), the CPU 61 starts the cloth feeding operation similar to the standard sewing processing (step S22). S23). Henceforth, since the process from step S23 to step S28 is the same as the sewing process of a standard specification, detailed description is abbreviate | omitted.

(Operational effect of the edge stitch sewing machine according to the present invention)
According to the above-described embodiment, the size identifying portions 41d and 41Ce are provided on the reflection surface 41c of the large presser 41A of the large presser unit of the standard specification and the long specification. As a result, the number of times the light receiving element 31 of the flap sensor 30 is turned ON differs depending on the type of the large pressing unit attached to the cloth feed mechanism 25 at that time. The EEPROM 69 stores correspondence data 69a indicating the correspondence between the number of times each detection pattern is turned on and the type of the large pressing units 40, 40C. The CPU 61 executes the size identification program 62a to detect the detection pattern by the flap sensor 30. The lengths of the large pressers 41A and 41B (41CA and 41CB) are determined from the number of ONs indicated by and the corresponding data 69a. Further, the CPU 61 reads the sewing parameter 69b corresponding to the determination result and sets the setting of the edge stitch sewing machine according to the type of the large presser units 40 and 40C. Therefore, it is possible to eliminate the conventional problem of lowering work efficiency due to interruption of the sewing work due to an error occurring during the sewing work without conforming to the length of the large presser and the setting of the edge sewing machine. The work efficiency is greatly improved. In addition, it is possible to solve the conventional problem that the sewing quality is deteriorated by performing the sewing with an incorrect setting, and the sewing quality is greatly improved.

(Other)
The type of the large presser unit, that is, the length of the large presser, may be determined every time the large presser is moved from the upstream side to the downstream side before the dough setting, or the start switch 66 or the main power source (illustrated). (Omitted) It may be only once immediately after ON. Further, a mechanism for detecting the attachment / detachment of the large presser unit 40 (40C) is provided in the cloth feed mechanism 25 or the like, and the determination is made when the large presser moves before the fabric set immediately after the attachment / detachment is detected by the mechanism. Also good.
In the above-described embodiment, the size identifying units 41d and 41Ce can determine the large pressing unit 40 (40C) by changing the number of ON times of the light receiving element 31 depending on the number of shielding units. The size of the reflection surface 41c (41Cc) or the extension line of the reflection surface 41c (41Cc) is provided, so that the ON / OFF detection pattern by the light receiving element 31 is the length of the large press 41A, 41B (41CA, 41CB). Different detection patterns may be used for each, and the present invention is not limited to the above-described embodiment.

12 to 14 are explanatory views showing a large presser 41A (41CA) provided with a size identification unit according to another embodiment. 12 shows a case where a size identifying portion is provided on the upstream side of the reflecting surface 41c (41Cc), FIG. 13 shows a case where the width of the shielding portion of the size identifying portion is different in the X-axis direction, and FIG. 41Cc) shows a case where the lengths in the X-axis direction are different. 12 (a), 13 (a), and 14 (a) are the large presser 41A of the standard large presser unit 40, and FIGS. 12 (b), 13 (b), and 14 (b) are the same. The large presser 41CA of the long presser large presser unit 40C is shown.
For example, as shown in FIGS. 12A and 12B, size identifying portions 41f and 41Cg may be provided on the upstream side (left side in FIG. 3) of the reflective surface 41c (41Cc). Further, as shown in FIGS. 13A and 13B, the widths in the X-axis direction of the shielding portions of the size identifying portions 41h and 41Ci may be different. Further, as shown in FIGS. 14A and 14B, the lengths H1 and H2 of the reflecting surface 41c (41Cc) may be different. In the case of the size identification unit shown in FIGS. 13A, 13B, 14A, and 14B, the determination unit determines the type of the large pressing unit from the difference in the ON / OFF occurrence time of the flap sensor. There is a need. The correspondence data also needs to be associated with the ON / OFF occurrence time of the flap sensor and the type of the large pressing unit. Note that the size identification section shown in FIGS. 13A and 13B may be located upstream of the reflection surface 41c (41Cc). In addition to the above-described embodiments and examples other than those shown in FIGS. 12 to 14, any size identifying unit may be used as long as the detection pattern of the flap sensor is different. For example, a size identifying unit may be provided only on the reflective surface of one large holding unit, and the presence or absence of the size identifying unit may be determined based on the detection pattern.
At this time, it is desirable that the position where the function functioning as the size identification unit is provided is, in principle, the vicinity of the end of the reflection surface 41c (41Cc) where the end of the flap cloth F is not positioned.

Further, the present invention is not limited to the form of the edge stitch sewing machine 10 of the above-described embodiment, and may take another form within a range not departing from the characteristics of the present invention. For example, the configuration of the two large pressers 41A, 41B (41CA, 41CB) and the vicinity thereof is not limited to a unitized configuration like the large press unit 40, and only two large pressers may be replaceable. In addition, the two large pressers may be provided so as to be individually replaceable. Moreover, the structure provided with the size identification part in which the detection pattern of a flap sensor which each differs about the length of three or more types of large pressings may be provided.
The operation control device 60 performs software control in which the CPU 61 calls and processes various programs, data, and parameters. However, a dedicated device may be provided for each operation of the edge stitch sewing machine. Further, control by an analog circuit may be performed.

It is a top view which shows the state immediately after the sewing of a bead stitch. It is a perspective view which shows the schematic structure of the whole edge stitch sewing machine. It is a front view of a bead stitch sewing machine. It is a perspective view of a needle up-and-down movement mechanism. It is a perspective view of a large press feed mechanism. It is a top view which shows the state by which the flap cloth was set to the mounting part of the upper surface of a large pressing. It is a top view of a large presser. FIG. 7A shows a large press of the standard large press unit, and FIG. 7B shows a large press of the long press unit. It is a block diagram which shows the control system of a bead stitch sewing machine. It is a flowchart which shows operation | movement of a bead stitch sewing machine. It is a flowchart which shows the operation | movement of the edge stitch sewing machine in the sewing process of a standard specification. It is a flowchart which shows operation | movement of the edge stitch sewing machine in the sewing process of a long specification. It is explanatory drawing which shows the large press at the time of providing a size identification part in the upstream of a reflective surface. FIG. 12A shows the large press of the standard large press unit, and FIG. 12B shows the large press of the long press unit. It is explanatory drawing which shows large holding | suppressing when the width | variety of the X-axis direction of the shielding part of a size identification part is varied. FIG. 13A shows a large press of the standard large presser unit, and FIG. 13B shows a large press of the long presser unit. It is explanatory drawing which shows large holding | suppressing when the length of the X-axis direction of a reflective surface is made different. FIG. 14A shows the large press of the standard large presser unit, and FIG. 14B shows the large press of the long presser unit.

Explanation of symbols

25 cloth feed mechanism 27 presser motor 30 flap sensor 31 light receiving element 33 light emitting element 40, 40C large presser unit 41A, 41B, 41CA, 41CB large presser 41c, 41Cc reflective surface 41d, 41Ce size identifying unit 60 operation control device 61 CPU
62 ROM
69 EEPROM

Claims (1)

A pair of left and right large pressers that hold the body fabric on the mounting table together with the ball cloth,
A flap holding mechanism that is provided in at least one of the large pressers and holds a flap cloth on the upper surface of the large presser;
A cloth feed mechanism for transferring the pair of large pressers along a predetermined cloth feed direction;
A flap end detection reflector formed on the upper surface of at least one large press provided with the flap holding mechanism along the cloth feed direction;
A flap sensor that irradiates the reflection part with light, receives the reflected light, and detects an end of the flap cloth by a change in a detection state of the reflected light by the flap cloth, and
The large presser is provided such that a plurality of pressers having different lengths in the direction along the cloth feeding direction can be exchanged with respect to the cloth feed mechanism, and any one of the plurality of large pressers is connected to the cloth feed mechanism. In the edge stitch sewing machine that attaches to the feed mechanism and performs sewing,
On each of the large pressing reflectors or on the extension line of the reflecting part, a size identifying unit is provided that generates a detection pattern of different reflected light corresponding to the length in the cloth feeding direction of each large pressing,
Storage means for storing correspondence data indicating a correspondence relationship between each detection pattern and the length of the large presser;
An edge stitch sewing machine comprising: a discriminating means for discriminating a length of the large press from a detection pattern of reflected light by the flap sensor and the corresponding data.

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