JP4975360B2 - Sewing sewing machine - Google Patents

Description

  The present invention relates to a sewing machine that performs bead stitching.

Conventional edge stitch sewing machines are provided with input means for setting an arbitrary position on the table as a reference position, and irradiation means for irradiating a marking light to the set reference position to allow the operator to recognize it. The person has set the fabric by matching the position where the sewing of the fabric is desired to start or the position where the sewing is desired to end with the irradiation position of the marking light.
The edge stitch sewing machine holds and conveys the set fabric, and performs operation control so that sewing is started or finished at a position corresponding to the reference position of the held fabric (for example, Patent Document 1).
JP 2001-162078 A

However, even if the mechanical transport distance is the same, there is an error due to differences in friction with the transport means and table due to differences in the thickness and material of the fabric, and the sewing start position and end position are always the thickness of the fabric. Deviation may occur depending on the sheath material. Further, the irradiation position of the marking light may have an error in the irradiation position due to an installation error or the like. In spite of this error, the position where the operator wants to start sewing the fabric (sewing start position) or the position where the operator wants to finish sewing the fabric (sewing end position) is the respective position. Even if sewing is performed by setting the fabric so that it matches the front reference position and the rear reference position, which are the irradiation positions of the marking lights corresponding to, the actual sewing start position and sewing end position are not aligned with the desired positions. There is a problem that the quality of the sewing product is lowered.
An object of the present invention is to improve the sewing quality.

The invention according to claim 1 has a needle up-and-down moving mechanism that has two sewing needles that are moved up and down by a spindle motor, and that forms two parallel seams by moving up and down the two sewing needles. A pair of large pressers and a vertical movement drive means for pressing and holding the fabric placed on the placing table in the lowered position by moving the large presses up and down, and holding down the fabric by lowering the large pressers A conveying means for conveying the two sewing needles from the set position to be moved to the vertical movement position, and a light emitting portion arranged on the upstream side in the cloth feeding direction with respect to the two sewing needles and above the mounting table, A marking irradiating device for irradiating a point mark to a reference position for aligning a sewing end portion of the fabric placed on the mounting table by light emission from the light emitting portion, the conveying means and the spindle motor Drive the fabric to the base In an edge stitch sewing machine comprising control means for forming stitches on the fabric by moving the two sewing needles up and down while being conveyed so that sewing starts or ends at a position, after the sewing is finished, the fabric A re-set control means for controlling the conveying means so as to move the large presser to the set position again while pressing and holding, and an actual sewing end position of the cloth after the sewing at the set position. Moving operation means for performing input for correcting the irradiation position of the point mark as the reference position so that the irradiation position of the point mark coincides, and the irradiation position of the point mark in the next sewing is corrected by the moving operation means. The correction control means for controlling the marking irradiation device so as to be the reference position is provided.

  The invention described in claim 2 has the same configuration as that of the invention described in claim 1, and the marking irradiation device moves the irradiation position of the point mark irradiated by the light emitting unit in accordance with an input from the moving operation means. Marking light driving means to be operated, and position storage means for storing operation position information for irradiating the point mark to the reference position by driving of the marking light driving means, and the correction control means includes the position storage The operation position information stored in the means is updated to the operation position information for irradiating the point mark to the reference position corrected by the input operation of the movement operation means, and based on the updated operation position information The marking irradiation apparatus is controlled.

According to the first aspect of the present invention, the point mark is irradiated to the reference position for aligning the sewing end portion of the fabric by the marking irradiation device. The “sewing end” refers to a sewing start position or a sewing end position. Only one of these may be irradiated, or may be selectable.
When the fabric is set by the operator so that the position where the sewing of the fabric is scheduled to start or end coincides with the point mark, the large presser is lowered and held from above, and the sewing needle is moved from the set position to the sewing needle. It is transported towards.
Then, on the assumption that the sewing start position or the sewing end position is aligned with the reference position described above, the transport distance to start sewing from the set position is obtained, and sewing is started based on the calculated transport distance. The
After the end of sewing, the fabric is returned to the original set position by the re-set control means, and the large presser is kept in the lowered state and the fabric is held at the set position. At this time, if the irradiation position of the point mark by the marking irradiation apparatus does not match the actual stitch start position or sewing end position, the irradiation is performed with an error from the position where the point mark should be irradiated. Will be.
Therefore, the operator performs input for position correction so that the irradiation position of the point mark coincides with the actual sewing start position or sewing end position by the moving operation means.
In the next and subsequent sewing operations, the correction control means executes control of the marking irradiation apparatus so that the point mark is irradiated to the reference position corrected by the input from the moving operation means.
Note that the light emitting unit may continue irradiation throughout sewing.

  As described above, according to the first aspect of the present invention, since the fabric is returned to the set position after the end of sewing and is held by the large press, even when the irradiation position deviation of the point mark occurs. Correction by the moving operation means can be performed. In the subsequent sewing, only the cloth setting position is changed based on the corrected reference position without changing the sewing start position and the sewing end position with respect to the cloth conveyance distance. In other words, in the next and subsequent sewing, the point mark is irradiated to the sewing start position where sewing is actually started and the sewing end position where sewing is actually finished, so that sewing is performed at an accurate position with respect to the fabric. Thus, the sewing quality can be improved.

  In the second aspect of the invention, when the irradiation position of the point mark is adjusted by the moving operation means after the fabric returns to the set position, the irradiation position is changed according to the input by driving the marking light driving means. Furthermore, the operation position information for irradiating the irradiation position corrected by the position change is stored in the position storage means. Thereby, in the next sewing, the point mark is irradiated to the corrected reference position by reading the operation position information of the position storage means.

  As described above, according to the second aspect of the present invention, when the irradiation position of the point mark is adjusted by the movement operation means, the irradiation position is actually changed according to the input from the movement operation means. While actually checking, the irradiation position of the point mark can be adjusted to the actual sewing start position or sewing end position of the seam, and the irradiation position of the point mark can be adjusted more accurately. Accordingly, it is possible to further improve the sewing quality.

(Overall configuration of the stitching machine)
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, FIG. 2 is a front view of the edge stitch sewing machine 10, and FIG. 3 is a block diagram showing a control system 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 a state where the sewing machine 10 is installed on a horizontal plane, the Z-axis direction indicates a vertical direction, the X-axis direction indicates a horizontal direction that coincides with the cloth feed direction, and the Y-axis direction is horizontal and orthogonal to the X-axis direction. Indicates direction.

The edge stitch sewing machine 10 has a table 11 as a mounting table as a work table for sewing and a point mark P for positioning the cloth C as a set position on the table 11 on the cloth C. A marking irradiation device 30 having marking lights 31 and 32 as light emitting portions for irradiation, a large press feed mechanism 40 as a conveying means for conveying the body cloth C from the set position to the vertical movement position of the two sewing needles 13, A binder mechanism that folds the both sides of the ball cloth by applying the binder 12 to a cloth (not shown) to be sewn on the cloth C, and a cloth C fed along the X-axis direction by the large press feed mechanism 40 The needle motor 16 moves the two sewing needles 13 up and down by the main shaft motor 16 and the needle up-and-down moving mechanism for forming the seam, and the moving knife 14 is moved up and down at the downstream side of the sewing needle 13 in the cloth feeding direction. A scalpel mechanism that forms a cut, a hook mechanism that captures a 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 scalpel mechanism; There are provided a corner knife mechanism 90 that forms a substantially V-shaped cut at both ends of the straight cut, and an operation control means 60 that controls the operation of each of the above-described configurations.
The above-described bead sewing machine 10 is a so-called automatic bead in which a series of sewing operations are performed in accordance with various parameters required for pre-set bead sewing without requiring other input operations when sewing is started. This corresponds to a sewing machine.
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 15 a of the table 11 by the sewing needle 13. 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. Has been placed.

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 main shaft motor 16 is disposed below the sewing machine frame 80, and a lower shaft that transmits the rotational driving force of the shuttle mechanism from the main shaft motor 16 is supported in the bed portion 81 in a state along the Y-axis direction. In the arm portion 83, an upper shaft that transmits the vertical movement driving force of the needle vertical movement mechanism from the main shaft motor 16 is supported 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 includes two sewing needles 13 constituting two needles, two needle bars that hold the respective sewing needles 13 of the two needles at the lower end, and each needle bar along its longitudinal direction. The upper and lower metal bearings that are slidably supported, the needle bar holder that holds the two needle bars at the same time, the upper shaft that is rotationally driven by the main shaft motor 16, and one end of the upper shaft are fixedly connected to each other for rotational movement. It has a well-known configuration including a rotating weight to be performed and a crank rod having one end connected to a position eccentric from the rotation center of the rotating weight and the other end connected to a needle bar holder.

When the upper shaft is rotated, the rotating weight rotates in the same manner, one end of the crank rod performs a circular motion around the upper shaft, and the other end moves in the Z-axis direction of the circular motion of the one end. Only the needle bar is transmitted to each needle bar so that each needle bar moves up and down.
The two sewing needles 13 are arranged side by side along the Y-axis direction, and form two stitches along the X-axis direction on the body cloth C conveyed along the X-axis direction.

(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. And a transmission mechanism for transmitting the rotational driving force from the female motor 17 instead of the reciprocating driving force in the vertical direction.
That is, the knife motor 17 rotates along with the feeding operation of the body cloth C, moves the moving knife 14 up and down by the transmission mechanism, and repeatedly forms cuts according to the knife width to form linear cuts.

(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.
As described above, a rotational driving force is applied to the lower shaft from the output shaft of the spindle motor 16 by the timing belt. When the lower shaft is rotationally driven, the rotational driving force is transmitted to the hook gear via each transmission gear, and each horizontal hook rotates 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 it so that the loop is passed through the horizontal hook to rotate the lower thread. Insert and thread the sewing thread and bobbin thread.

(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 applies to the binder 12 an air cylinder (not shown) serving as a drive source for the raising and lowering operation of the binder 12, an electromagnetic valve 18 that drives the air cylinder, and a driving force of the air cylinder in place of a vertical moving force. A plurality of link bodies.
At the time of sewing, the binder mechanism lowers the binder 12 by the air cylinder, and the ball cloth is bonded to the binder 12 so as to have a cross-sectional shape of the binder 12 in cooperation with a pair of large pressers 41 of the large press feed mechanism 40 described later. The webbing is fed out in the longitudinal direction while being held so as to be wound around the body cloth, and sewing to the body cloth C is performed.

(Large press feed mechanism)
The large presser feed mechanism 40 includes a pair of large pressers 41 (one of which is not shown) that presses the cloth C from above at positions on both sides of the sewing needle 13, and a support body that supports the large pressers 41 so as to be movable up and down. 42, a pressing air cylinder 43 as a vertically moving drive means for moving the large presser 41 up and down with respect to the support 42, an electromagnetic valve 44 for controlling the driving of the pressing air cylinder 43, and the large presser 41 A pressing motor 45 that moves the cloth C in the cloth feeding direction, and a ball screw mechanism 46 that converts a rotational driving force of the pressing motor 45 into a linear driving force along the X-axis direction and transmits the linear driving force to the support 42. ing.

Each large presser 41 is a flat plate that is wedge-shaped in cross-sectional view and rectangular in plan view, and is supported by the support 42 in a state in which the longitudinal direction is along the X-axis direction. And it can switch to two upper and lower positions by the drive of the air cylinder 43, and when it is an upper position, it separates from the upper surface of the table 11, and descends to near the upper surface height of the table 11 in a lower position.
The ball screw mechanism 46 supports the support 42 so as to be movable along the X-axis direction on the table 11, and the two large pressers 41 supported by the support 42 are on both sides of the vertical movement path of the two needles 13. Is arranged to pass through.

(Corner knife mechanism)
The corner knife mechanism 90 is arranged below the table 11 and in the passage path of the large presser 41 by the large presser feed mechanism 40, and the large presser feed mechanism 40 operates the corner knife 91 composed of a pair of scalpels 91a and 91b. A substantially V-shaped cut V is formed at a position corresponding to both ends of the linear cut by penetrating the corner knife 91 from below to the body cloth C conveyed to the position.
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 knife 91a along the X-axis direction. ing.
The corner knife 91 has a V-shaped cross section viewed from above, and forms a V-shaped cut V by penetrating each body cloth from below.
That is, when the fabric C and the ball cloth in which the seam and the linear cut are formed are conveyed by the large press feed mechanism 40 to a predetermined position downstream of the moving knife 14 in the cloth feeding direction, the corner knife is cut. Then, the corner knife 91 is positioned and raised at the lower position on the other end side of the cut, and two V-shaped cuts V are formed.

(Marking irradiation device)
As shown in FIG. 4, the marking irradiation device 30 includes a first marking light 31 as a light emitting unit that irradiates slit light P <b> 1 along the Y-axis direction downward, and slit light P <b> 2 along the X-axis direction downward. A second marking light 32 as a light emitting unit to be irradiated; an X-axis position adjusting motor 33 as a marking light driving means for rotating and adjusting the first marking light 31 about an axis along the Y-axis direction; and a sewing machine arm A first support portion 34 that extends from the front side of the tip of the portion 83 toward the upstream side in the sewing direction and supports the first marking light 31 via the X-axis position adjustment motor 33; A second support portion 35 extending from the front side of the front end toward the upstream side in the sewing direction and rotatably supporting the second marking light 32 around an axis along the X-axis direction; It is provided.

FIG. 4 is an enlarged perspective view showing each configuration of the marking irradiation device 30. FIG. 5 is a plan view showing the irradiation position of the point mark P, the two sewing needles 13, the moving knife 14, and one corner knife 91. It is arrangement | positioning explanatory drawing shown by. The point mark P that the marking irradiation device 30 irradiates on the upper surface of the table 11 is along the X-axis direction that the slit light P1 along the Y-axis direction irradiated by the first marking light 31 and the second marking light 32 irradiates. And the slit light P2. That is, the setting position of the cloth C is indicated by the intersection position of the slit light P1 and the slit light P2.
The slit light P1 along the Y-axis direction irradiated by the first marking light 31 indicates a position component in the X-axis direction at the set position, and the slit along the X-axis direction irradiated by the second marking light 32. The light P2 indicates a position component in the Y-axis direction at the set position.

  The second support portion 35 is provided with a fastening screw (not shown) that fixes and holds the second marking light 32, and the second marking is made around the axis along the X-axis direction with the fastening screw loosened. The irradiation position adjustment of the light 32 is performed manually, and the position adjustment is performed so that the slit light P2 passes through the intermediate position between the two sewing needles 13.

The first support portion 34 is moved by the X-axis position adjusting motor 33 to move the irradiation position of the first marking light 31 around the axis along the Y-axis direction.
The X-axis position adjustment motor 33 is a stepping motor as a marking light driving unit whose operation is controlled by the operation control unit 60, and the irradiation position of the slit light P1 can be moved along the X-axis direction by step driving. It has become.

With the above configuration, the marking irradiation device 30 irradiates the point mark P toward the upper surface of the table 11 in order to align the sewing start position or the sewing end position in the body cloth C.
The reference position for aligning the sewing start position (referred to as the front reference position) and the reference position for aligning the sewing end position (referred to as the rear reference position) are input from the display input means 65 described later. When there is a selection, the irradiation position of the first marking light 31 is switched so as to be the respective irradiation position by driving the X-axis position adjusting motor 33. The motor drive amount (the number of steps from the motor origin) for irradiating the slit light P <b> 1 at each of the front reference position and the rear reference position is stored in the memory 63.
As will be described later, the irradiation positions of the front reference position and the rear reference position are adjusted by an input operation from the display input means 65. In this case, the irradiation position of the irradiation position is also controlled by driving the X-axis position adjustment motor 33. A move is made.

Note that the irradiation position of the front reference position and the irradiation position of the rear reference position of the slit light P <b> 1 are straight stitch lengths in which the irradiation position of the rear reference position is upstream in the cloth feeding direction and each irradiation position is set in advance. It is controlled to be irradiated by L apart.
As a result, as long as the linear sewing length L is constant, even if either the front reference position or the rear reference position is selected, if the sewing is started after conveying the distance H from the front reference position to the sewing needle, Sewing is started from a predetermined sewing start position (see FIG. 5).

(Control system for hem stitch machine)
As shown in FIG. 3, the operation control means 60 displays various settings relating to sewing and the current state of the sewing machine, as well as screen selections and commands for performing various settings, and display inputs for inputting numerical values. Means 65 and an operation pedal 68 for inputting the start of sewing are connected via an input / output circuit (not shown).

The display input means 65 includes a display panel and a sheet-like touch sensor attached to the surface of the display screen, and detects a position touched from the outside on the surface of the sheet. The display panel displays a switch screen for performing various inputs together with the display information, and the operator can detect the switch input by bringing the fingertip into contact with the switch screen. That is, in cooperation with the display panel and the touch sensor, the display panel and the touch sensor function as setting input means for selecting various screens, inputting commands, and inputting numerical values.
Specifically, from the display input means 65, various parameters for performing the edge stitch, for example, the sewing pitch, the rotational speed of the spindle motor 16, the stitch length of the bead stitch (the large number of stitches for forming the seam). The operator performs setting input such as whether the setting of the body cloth C is performed at the front reference position or the rear reference position, position setting input of the front reference position or the rear reference position, and the like. . Further, buttons B1 to B7 described later are realized by the display input means 65.

  The operation pedal 68 can be stepped in a multi-stage manner. When the operation pedal 68 is depressed to the first step, the point mark P is irradiated. Further, when the second stage is stepped on, the air cylinder 43 is activated and the large pressers 41 in the upper position are lowered to the lower position, and the body cloth C and the drape set on the table 11 (collectively The cloth held by each large presser 41 is conveyed toward the cloth feeding direction by driving the presser motor 45. Further, when the pedal is stepped up to the third stage, the air cylinder 43 is operated only in the later-described marking light adjustment mode to raise each large presser 41 at the lower position to release the fabric.

Further, the operation control means 60 includes a spindle motor 16, a holding motor 45, a knife motor 17, a corner knife drive motor 94, and an X-axis position adjustment motor 33, which are objects of control, respectively, as drivers 16a, 45a, 17a, 94a, It is connected via 33a.
The operation control means 60 includes solenoid valves 18 and 44 that control the operation of an air cylinder that moves the binder 12 up and down, an air cylinder 43 that raises and lowers the large presser 41, and an air cylinder 92 that raises and lowers the corner knife 91. , 93 are connected via drivers 18a, 44a, 93a, 54a, 26a, 27a.
Furthermore, the operation control means 60 is connected to the first and second marking lights 31 and 32 of the marking irradiation device 30 via drivers 31a and 32a.

The operation control means 60 includes a CPU 61 for performing various controls, a program memory 62 in which a normal sewing program 62a and a marking light adjustment program 62b are stored, and a memory 63 in which control data or various setting data is written. ing.
The memory 63 stores various parameters (sewing pitch, rotational speed of the spindle motor 16, stitch length L of the bead stitch (the stitch length for forming the stitches) inputted from the display input means 65 for performing the bead stitching. Data 63a, 63b, 63c), data 63d indicating whether the point mark P is irradiated to the front reference position or the rear reference position, and operation for irradiating the front reference position Position information 63e, operation position information 63f for irradiating the rear reference position, selection mode data 63g indicating which of two kinds of sewing modes to be described later is selected, sewing needle 13, moving knife 14, corner knife 91, Data (not shown) indicating the arrangement and operation amount of 92 is stored.

  The data 63 a, 63 b, 63 c of the sewing pitch, the rotational speed of the spindle motor 16, and the stitch length of the edge stitches are updated by numerical input by the display input means 65. These are used to calculate the rotational speed of the presser motor 45, the drive start or stop position when performing sewing.

Setting data 63 d indicating which of the front reference position and the rear reference position is irradiated with the point mark P is set by an input from the display input means 65. At the time of sewing, the setting data 63d is read and the irradiation position of the point mark P is determined.
As the operation position information 63e for irradiating the front reference position and the operation position information 63f for irradiating the rear reference position, one of the corresponding positions is read when the irradiation position of the point mark P is selected. The X-axis position adjusting motor 33 is driven to a predetermined position according to the information 63e or 63f, and the slit light P1 of the point mark P is irradiated to the set position.
Further, the operation position information 63e and 63f is rewritten in the process of a marking light adjustment program 62b described later.
The memory 63 stores the operation position information 63e and 63f in an updatable manner, thereby storing operation position information for irradiating the point mark P to the reference position by driving the X-axis position adjustment motor 33. It functions as a position storage means.

(Sewing control by operation control means)
The edge stitch sewing machine 10 can select whether to execute only the normal sewing mode or to additionally execute the marking light adjustment mode, and these modes are selected by input from the display input means 65 at the time of sewing. Is done.
When the normal sewing mode is selected, the CPU 61 executes operation control for releasing the fabric by raising the large presser 41 after executing the edge sewing by the normal sewing program 62a stored in the ROM 62.
That is, the CPU 61 irradiates the point mark P by the marking irradiation device 30, and holds the body cloth C and the drapery (cloth) set at the set position on the table 11 (position where the point mark P is aligned). Holding and conveying by the feed mechanism 40, forming a straight seam by the needle up-and-down moving mechanism, forming a straight cut by the knife mechanism, and forming a V-shaped cut by the corner knife mechanism 90, and finally raising each large presser 41 The operation control for releasing the fabric is executed by the above.

On the other hand, when the marking light adjustment mode is selected, the CPU 61 returns the fabric to the set position and presses it down with the marking light adjustment program 62b stored in the ROM 62, after executing the edge stitching until the V-shaped cut is formed. Operation control for maintaining the holding state without raising 41 is performed. That is, the CPU 61 functions as a reset control unit by executing the marking light adjustment program 62b.
At that time, the irradiation of the point mark P is continued to the fabric that has been sewed and is held by the large presser 41, and the position input screen for the slit light P1 of the point mark P is displayed on the display input means 65. Control to display G2 (see FIG. 10) is performed. The position adjustment buttons B3 and B4 displayed on the position adjustment input screen G2 realize a function as a moving operation means for performing an input for correcting the irradiation position of the point mark.
Further, when the position adjustment input screen 65 receives the position adjustment input of the slit light P1 from the display input means 65, the CPU 61 drives the X-axis position adjustment motor 33 according to the input and slits the correction position into the correction position. A process of updating the number of steps of the X-axis position adjusting motor 33 for irradiating the light P1 as the operation position information 63e (or 63f) stored in the memory 63 is executed. Thereby, at the time of sewing after the next time, the point mark P can be irradiated to the irradiation position where the position adjustment of the slit light P1 has been performed. That is, the CPU 61 functions as a correction control unit by executing the marking light adjustment program 62b.

FIG. 6 is an explanatory diagram schematically showing the positional relationship seen from above between the cloth after sewing and the irradiation position of the slit light P1 of the point mark P. FIG. This supplements the processing of the marking light adjustment program 62b.
When the cloth is returned to the set position after sewing and the cloth holding state is maintained, the position irradiated with the point mark P can be compared with the position where the sewing is actually performed. As shown in FIG. 6, when there is a deviation between the irradiation position of the slit light P1 of the point mark P indicating the sewing start position and the sewing start position indicated by the stitch after completion of sewing, the irradiation position of the slit light P1 is incorrect. Therefore, in the processing of the marking light adjustment program 62b, the adjustment of the irradiation position of the slit light P1 can be input from the display input means 65 after the fabric is returned to the set position. Further, when the adjustment is input, the X-axis position adjustment motor 33 is driven to control the movement of the slit light P1, and the irradiation position of the slit light P1 can be corrected to a more accurate position while visually confirming the position. I am doing so.
Further, the number of steps from the origin position of the X-axis position adjusting motor 33 after the correction input is used as the new operation position information 63e (or 63f) to update the storage of the memory 63, so that the position at the next sewing can be obtained. The corrected slit light P1 is reflected on the irradiation position of the point mark P.

(Explanation of the operation of the sewing machine)
FIG. 7 is an overall operation flowchart when sewing the edge stitch sewing machine 10, and FIG. 8 is a flowchart showing processing unique to the marking light adjustment mode included in the processing at the time of sewing. Note that the processing from step S12 to S15 is processing based on the marking light adjustment program 62b, and the other processing is processing based on the normal sewing program 62a.
When the main power is turned on, the CPU 61 executes control for causing the display input means 65 to display the sewing data setting screen G1 shown in FIG. On the setting screen G1, setting input buttons for various parameters required for sewing are displayed, the sewing pitch, the rotation speed of the spindle motor 16, the sewing length of the edge stitch, and the irradiation position of the point mark P (previous reference or rear reference) Etc. can be set. When these setting inputs are made, the data 63a to 63d are newly registered in the memory 63 (step S1).

When the adjustment mode selection button B1 on the setting screen G1 is pressed, the execution of the marking light adjustment mode is selected and the shape of the adjustment mode selection button B1 is a concave shape indicating that the marking light adjustment mode is selected. The display is changed to a three-dimensional display (indicated as a shaded display in FIG. 10), and the selection mode data 63g in the memory 63 is updated to the content indicating the selection of the marking light adjustment mode. Such mode selection can be performed until the cutting operation by the corner knife mechanism is completed. If the adjustment mode selection button B1 is not pressed until that time, the selection mode data 63g maintains the contents indicating selection of the normal sewing mode.
When the adjustment mode selection button B1 is pressed again while the selection mode data 63g in the memory 63 indicates the selection of the marking light adjustment mode, the selection of the marking light adjustment mode is canceled and the shape of the adjustment mode selection button B1 Is returned to the normal plane display, and the selection mode data 63g is returned to the content indicating the selection of the normal sewing mode.

  Next, when the first step of the operation pedal 68 is depressed, the marking lights 31 and 32 are turned on, and the point mark P is irradiated to the reference position on the table 11 (step S2). At this time, it is read out from the data 63d in the memory 63 which of the front reference position and the rear reference position should be irradiated, and X is set so as to be the irradiation position indicated by the operation position information 63e or 63f accordingly. The shaft position adjusting motor 33 is driven to irradiate the slit light P1.

According to the irradiation of the point mark P, the operator sets the cloth C on the table.
In the meantime, the CPU 61 is in a waiting state for the second step of the operation pedal 68 (step S3), and when the step is performed, each large presser 41 is lowered and the body cloth C is held. Furthermore, a ball cloth is set on the upper surface of each large presser 41 by a not-shown ball cloth supply device, and the binder descends and holds from above. The fabric thus held is conveyed toward the sewing needle 13 by driving the pressing motor 45 (step S4).
When the fabric is conveyed for a predetermined distance, the driving of the spindle motor 16 is started and the formation of the stitches is started. When the cloth is further conveyed for a predetermined distance, the formation of the linear cut is also started by the driving of the knife motor 17.
The motors 16 and 17 are stopped when a predetermined distance has been conveyed according to the sewing setting parameters, and the formation of the stitches and the formation of the straight cuts is completed.
Then, the fabric is conveyed to above the corner knife 91, 92, and when the V-shaped cut is formed at both ends of the straight cut, the main sewing work is completed.

Next, the process proceeds to the marking light adjustment mode shown in FIG. 8 (step S5).
First, the selection mode data 63g in the memory 63 is read, and it is determined whether or not the marking light adjustment mode is selected by operating the adjustment mode selection button B1 (step S11).
When the marking light adjustment mode is not selected, each large presser 41 is raised by driving the air cylinder 43 (step S16), and the fabric is released. The released fabric is stacked by a stacker (not shown). Thereafter, the process is returned to step S1, and a new sewing setting input or a sewing operation for the next fabric can be started.

When the marking light adjustment mode is selected, the fabric is returned to the original set position by driving the presser motor 45 (step S12), and each large presser 41 is in a standby state while maintaining the fabric holding state. (Step S13).
As a result, the point mark P is irradiated onto the fabric that has been sewn at the set position, and the operator can use the slit light P1 of the point mark P whose sewing start position or sewing end position is the actual stitching position. It is possible to visually confirm whether or not the position matches.
As a result, when the actual stitch start position or stitch end position does not coincide with the position of the slit light P1 of the point mark P, the adjustment input button B2 on the setting screen G1 (FIG. 9) is pressed. The position adjustment input screen G2 is called to adjust the position of the slit light P1. That is, the position adjustment input screen G2 (FIG. 10) is displayed on the display input means 65, and position adjustment input can be performed by the position adjustment buttons B3 and B4 in the screen G2.
When the position adjustment button B3 is pressed, the display position of the slit light P1 is moved upstream by a predetermined unit amount, and when the position adjustment button B4 is pressed, the slit light P1 is output by a predetermined unit amount. The display position is moved downstream in the cloth feeding direction. When the determination button B5 is pressed, the operation position information 63e (or 63f) in the memory 63 is updated so that the slit light P1 is displayed at the display position at that time.
B6 is a selection button for the front reference position, and B7 is a selection button for the rear reference position. It is also possible to switch the object whose position is adjusted by these selection buttons B6 and B7. That is, when the selection buttons B6 and B7 are pressed, the position adjustment buttons B3 and B4 at the front reference position or the rear reference position are displayed and input is possible.
Further, in the standby state in which the cloth holding state of each large presser 41 is maintained, the irradiation position of the slit light P2 can be adjusted by manually changing the direction of the second marking light 32.

In the standby state of each large presser 41, the CPU 61 is in an input waiting state for the third step of the operation pedal 68 (step S14), and when the step is performed, it is determined that the marking light adjustment mode has ended, and the memory The selection mode data 63g in 63 is updated to the content indicating the normal sewing mode (step S15). When adjustment is not necessary, no input is performed in the process of step S13, and the operation pedal 68 can be depressed to advance the process to step S15.
Then, each large presser 41 is raised by driving the air cylinder 43 (step S16), and the fabric is released. Thereafter, the process is returned to step S1, and a new sewing setting input or a sewing operation for the next fabric can be started.

  In the next and subsequent sewing, the point mark P is irradiated based on the operation position information 63e or 63f in which the irradiation position (reference position) is accurately corrected by the marking light position adjustment mode.

(Effect of embodiment)
As described above, according to the ball stitch sewing machine 10, since the fabric is returned to the set position after the sewing is finished and is held by the large pressers 41, the irradiation position deviation of the point mark P is generated. Even in this case, correction can be performed by the position adjustment buttons B3 and B4 on the position adjustment input screen G2. Since the corrected reference position can be reproduced by the operation position information 63e and 63f in the memory 63, it is reflected in the subsequent sewing, and sewing is performed at an accurate position with respect to the fabric from the next sewing. Therefore, it is possible to improve the sewing quality.

  Further, when the irradiation position of the point mark P is adjusted by the position adjustment buttons B3 and B4 on the position adjustment input screen G2, the irradiation position is actually changed according to the input from the position adjustment buttons B3 and B4. While actually checking, the irradiation position of the point mark P can be adjusted to the actual stitch start position or sewing end position of the stitch, and the irradiation position of the point mark P can be adjusted more accurately.

(Other)
In the above-described bead stitch sewing machine 10, the slit light P <b> 1 irradiated by the first marking light 31 of the marking irradiation device 30 is switched due to the influence of the back-and-forth movement or the like because the drive switching is performed for the front reference position or the rear reference position. The marking irradiating device 30 adjusts the X-axis position of only the first marking light 31 because it can cause a deviation, or a positional deviation can occur in the X-axis direction position of the slit light P1 due to a change in the cloth thickness. The position of the motor 33 can be adjusted in the X-axis direction.
However, it goes without saying that the second marking light 32 may be provided with a Y-axis position adjustment motor so that the position can be adjusted in the Y-axis direction. In that case, similarly to the case of adjusting the position of the slit light P1 in the X-axis direction, the processing is performed so that the operation control means 60 receives the input of the adjustment when the sewing product returns to the set position again after sewing. Of course.
Further, the point mark P is not limited to the combination of the slit light P1 and the slit light P2, and may be a single mark as long as the set position can be indicated at least in the X-axis direction. Further, the shape may be spot light or the like, and there is no particular limitation.
Further, in the above-described bead stitch sewing machine 10, not only when the marking light adjustment mode is selected, the position adjustment input screen G2 can be called by pressing the adjustment input button B2 of the setting screen G1, but the marking light adjustment mode The position adjustment input screen G2 may be called only when selected. Further, processing may be performed so that the position adjustment input screen G2 is automatically displayed when the marking light adjustment mode is selected.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view showing an overall schematic configuration of a ball stitch sewing machine as an embodiment of the invention. It is a front view of a bead stitch sewing machine. It is a block diagram which shows the control system of a bead stitch sewing machine. It is the perspective view which expanded and showed each structure of the marking irradiation apparatus. It is the arrangement explanatory view which showed the irradiation position of a point mark, arrangement of two sewing needles, a moving knife, and one corner knife in plan view. It is explanatory drawing which shows schematically the positional relationship seen from the upper direction of the cloth and the irradiation position of the slit light of a point mark. It is a whole operation | movement flowchart at the time of sewing of a bead stitch sewing machine. It is a flowchart which shows the process peculiar to the marking light adjustment mode included in the process at the time of sewing. It is a display example of a setting screen. It is a display example of a position adjustment input screen.

Explanation of symbols

10 Sewing machine 11 Table (mounting table)
15a Needle drop position 16 Spindle motor 30 Marking irradiation device 31 First marking light (light emitting part)
32 Second marking light (light emitting part)
33 X-axis position adjustment motor (marking light driving means)
40 Large presser feed mechanism (conveying means)
41 Large presser 43 Presser air cylinder (vertical drive means)
45 Holding motor 60 Operation control means 61 CPU
63 Memory (position storage means)
63e, 63f Operation position information 65 Display input means (moving operation means)
68 Operation pedals B3 and B4 Position adjustment buttons (moving operation means)
C Body cloth (cloth)
P Point mark P1, P2 Slit light

Claims (2)

A needle up-and-down moving mechanism that has two sewing needles that are moved up and down by a spindle motor and forms two parallel stitches by moving up and down the two sewing needles;
A pair of large pressers and a vertical movement driving means for pressing and holding the fabric placed on the mounting table in the lowered position by moving the large presses up and down, and lowering the large presser and pressing and holding the fabric Conveying means for conveying from the set position to the vertical movement position of the two sewing needles;
A stitching end of the fabric placed on the table by the light emission from the light emitting unit on the upstream side in the cloth feeding direction and above the table with respect to the two sewing needles A marking irradiation device that irradiates a point mark to a reference position for positioning the part;
Control for forming a seam on the fabric by driving the transport means and the spindle motor to move the two sewing needles up and down while transporting the fabric so that sewing starts or ends at the reference position. In a hem sewing machine equipped with means,
A re-set control means for controlling the conveying means so as to move the large presser again to the set position while pressing and holding the fabric after the end of sewing;
Moving operation means for performing input for correcting the irradiation position of the point mark as the reference position so that the irradiation position of the point mark as the reference position coincides with the actual sewing end position of the fabric after the sewing at the set position; ,
An edge stitch sewing machine comprising correction control means for controlling the marking irradiation device so that the irradiation position of the point mark in sewing from the next time becomes a reference position corrected by the moving operation means. The marking irradiation device includes a marking light driving unit that moves an irradiation position of the point mark irradiated by the light emitting unit according to an input from the moving operation unit,
Position storage means for storing operation position information for irradiating the point mark to the reference position by driving the marking light driving means;
The correction control means updates the operation position information stored in the position storage means to operation position information for irradiating the point mark to a reference position corrected by an input operation of the movement operation means, and 2. The edge stitch sewing machine according to claim 1, wherein the marking irradiation device is controlled based on the updated operation position information.

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