JP6530243B2 - Ball edge sewing machine - Google Patents

Description

  The present invention relates to a sewing machine that performs ball edge sewing.

In the case of performing the ball edge sewing with the sewing of the interlining material S by the conventional ball edge sewing machine, as shown in FIG. 9, the operator sews the fabric (the body cloth and the ball cloth (all not shown)). The fabric is set in accordance with a predetermined reference position predetermined on the table of the sewing machine, at a position where the user wants to start (stitch start position) or a position where he wants to end the sewing (stitch end position).
The ball-edge sewing machine has a large presser which presses the fabric from above on the upper surface of the horizontal table and conveys the fabric toward a sewn position at which the sewing needle is located. Then, when performing alignment at the sewing start position, perform alignment at the front reference position F close to the sewing position, and when performing alignment at the sewing end position, align at the rear reference position R that is far from the sewing position. Do. The front reference position F and the rear reference position R indicate the positions to the operator, for example, by displaying a marker with a marking light from above.

  By the way, when sewing a strip-like interlining material S on the back side of the fabric in ball-edge sewing, a conventional ball-edge sewing machine forms an opening at the front reference position on the upper surface of the work bench and The leading end of the ground S is held in a state where it is slightly reminiscent, and it is captured by the large presser that moves forward to the sewing position, and the interlining S is conveyed to the sewing position with the fabric and sewed (for example, patent document 1).

JP 2007-195806 A

  By the way, the front reference position F and the rear reference position R of the ball edge sewing machine are set at positions separated to a certain extent in the transport direction so as to be able to cope with the sewing of a long ball cloth. Therefore, when aligning a cloth of a general length to the front reference position F and the rear reference position R, if the alignment to the rear reference position R is performed, the set position of the fabric is the front reference It is considerably backward (far from the sewing position) than the position F. That is, assuming that the distance from the front reference position F to the sewing position N is Fc, the distance from the rear reference position R to the sewing position N is Rc, and the sewing length to be applied to the fabric is c, Sewing is started when Fc is transported from the position, and sewing is started when (Rc-c) is transported from the set position in the case of the rear reference position R.

The opening for supplying the interlining S described above is provided at the front reference position F so that the interlining can be supplied in either of the front reference position F and the back reference position R. In order that the large press holding the set fabric can capture the interlining, it is on standby in a state where the tip end portion has been fed out from the opening by a length a on the sewing start side.
Under such a premise, when the interlining material S is supplied in the sewing of the rear reference position R, the large press holding the fabric holds and conveys the interlining material S fed out from the opening at the front reference position F. As a result, the interlining S starts to be unwound from a position far before the cloth. Therefore, the interlining S is sewn with a length more than necessary (the hatched portion in FIG. 9), and it is necessary to manually cut off the extra interlining S after completion of sewing.

  The above problem can be alleviated by setting the rear reference position R to the front side, but since the sewing length c can be performed only within the range of (Rc-Fc), sewing is possible. It is practically difficult to set the rear reference position R to the front side because the range of the length of the cloth becomes narrow.

  An object of the present invention is to provide a sewing machine capable of eliminating the need for removing an extra interlining when sewing at a rear reference position.

The invention according to claim 1 is a ball edge sewing machine,
A large presser feeding mechanism having a large presser that presses the fabric placed on the table from above and conveys it toward the sewing position;
A sewing machine motor for performing sewing on the fabric;
An interlining supply device which holds a roll of interlining wound below the table and supplies the interlining from an opening of the top surface of the table;
Transfer according to whether the cloth is placed at the front reference position for aligning the sewing start position of the cloth or at the back reference position for aligning the sewing end position of the cloth set on the upper surface of the table A control device for performing sewing from the sewing start position to the sewing end position with respect to the fabric to be
The interlining supply device includes an actuator that switches between a state in which the interlining can be supplied and a state in which the interlining can not be performed, according to the conveyance of the large press;
The control device causes the actuator to align the sewing start position of the interlining with respect to the fabric conveyed by the large pressing when the fabric is disposed at the back reference position. It is characterized by controlling state switching.

According to a second aspect of the present invention, there is provided a ball edge sewing machine according to the first aspect, wherein
The actuator of the interlining supply device is configured to stop the supply against the interlining against the interlocking with respect to the interlining being capable of being supplied along with the transportation of the intercrossing, and the state of releasing the interlocking, It is characterized by switching to.

The invention according to claim 3 is the ball-edge sewing machine according to claim 1, wherein
The actuator of the interlining supply device is characterized in that the feeding to a position where the interlining can be supplied is carried out along with the conveyance of the large press.

The invention according to a fourth aspect is the ball edge sewing machine according to any one of the first to third aspects, wherein
The control device is characterized by controlling the large pressing feed mechanism so as to reduce or stop the transfer speed by the large pressing feed mechanism when the large base is held by the large press and the interlining material starts to be transported. Do.

The invention according to claim 5 is the ball-edge sewing machine according to any one of claims 1 to 4,
A length setting unit for setting the length of the interlining to be supplied;
The interlining supply device has a cutting unit for cutting the supplied interlining,
The control device controls the cutting portion to cut the interlining when the interlining is pulled out by the set length by the large pressing.

The invention according to claim 6 relates to the ball-edge sewing machine according to claim 5.
The control device controls the large pressing and feeding mechanism such that a first conveying speed of the fabric before the start of sewing becomes higher than a second conveying speed of the fabric after the start of sewing;
The controller is
From the length of the interlining set by the length setting unit, it is determined whether or not the cutting of the interlining by the cutting unit is performed before the start of the sewing.
If the cutting of the interlining is performed before the start of the sewing, controlling the large press feeding mechanism so that the conveying speed at the time of cutting of the interlining becomes lower than the first conveying speed It features.

  According to the present invention, the control device performs alignment of the interlining start position on the fabric to be transported to the large press depending on whether the fabric is placed at the front reference position or the rear reference position. Since the actuator of the interlining supply device is controlled, the interlining can be supplied to the fabric at an appropriate position regardless of the front reference position or the back reference position, and the sewing is performed at the back reference position. Even in the case, it is possible to suppress the supply of excess interlining. Furthermore, this makes it possible to eliminate the work of cutting off the extra interlining after sewing.

BRIEF DESCRIPTION OF THE DRAWINGS It is a perspective view of the ball edge sewing machine which concerns on this embodiment. It is a side view of the ball edge sewing machine of FIG. It is a block diagram which shows the control system of the ball edge sewing machine of FIG. It is a perspective view of an interlining supply device. It is a front view of an interlining supply device. It is sectional drawing along the VV line | wire of FIG. It is sectional drawing of the interlining supply apparatus of the state which can supply of interlining. It is sectional drawing of the interlining supply apparatus in the state which can not supply interlining. It is explanatory drawing which shows the positional relationship of the interlining of a front reference position and a back reference position. It is a timing chart of sewing operation including interlining supply control. 5 is a flowchart of a sewing operation including interlining supply control. It is a timing chart of the sewing operation which shows the relationship between the parameter adjustment of the length of the interlining and the operation timing. It is a timing chart of sewing operation including other interlining supply control. It is a timing chart of sewing operation including other interlining supply control. It is a flowchart of sewing operation including the interlining supply control of FIG.

[Overall Configuration of Ball Edge Sewing Machine]
Hereinafter, a ball edge sewing machine 10 according to an embodiment of the present invention will be described based on FIGS. 1 to 11. FIG. 1 is a perspective view showing the general construction of the ball edge sewing machine 10, FIG. 2 is a front view of the ball edge sewing machine 10, and FIG. 3 is a block diagram showing a control system of the ball edge sewing machine 10. In the present embodiment, the directions of the respective parts of the sewing machine 10 are determined based on the XYZ axes shown in the respective drawings. When the sewing machine 10 is installed on a horizontal surface, the Z-axis direction indicates the vertical direction, the X-axis direction indicates the horizontal direction coincident with the cloth feeding direction, and the Y-axis direction is horizontal and orthogonal to the X-axis direction. Indicates the direction.
In the X-axis direction, the direction (downstream side in the transport direction) in which the large press feeding mechanism 20 described later transports the cloth during sewing is the front, and the upstream side in the transport direction is the back.

The ball-edge sewing machine 10 sews the cloth C on which the table 11 is placed and the table 11 on which the table 11 is placed. Marking irradiation device 30 which irradiates point mark indicating front reference position and back reference position on the table 11 as a reference on the table 11, and a large pressing feeding mechanism as a cloth feeding mechanism which holds the cloth C and feeds the cloth C. 20, a binder mechanism for raising and lowering a binder 12 for folding back both ends in the short direction of a long gauze (not shown) sewn to the body fabric C, and the large press feed mechanism 20 along the X axis direction Needle up-and-down movement mechanism which performs needle dropping with two sewing needles 13 to the body cloth C to be sent, and moving knife 14 up and down on the front side of the two sewing needles 13 to make straight cuts in body cloth C and ball cloth Form A hook mechanism that captures a sewing thread from each sewing needle 13 and entangles a lower thread, a sewing machine frame 80 installed on the table 11 that stores and holds the needle up-down movement mechanism and the knife mechanism, and a straight line A corner knife mechanism 90 forming a substantially V-shaped cut at both ends of the cut in a shape, and a roll Sr wound with a core S under the table 11 are held, and the tip of the core S is a table An interlining supply device 40 that feeds out through an opening 111 on the top surface of the unit 11 and a control unit 60 that controls the operation of each of the above configurations.
When sewing is started, the above-mentioned ball-edge sewing machine 10 is a so-called automatic ball-edge in which a series of sewing operations are performed according to various parameters required for ball-edge sewing which are set in advance without requiring another input operation. It corresponds to a sewing machine.
The following describes each part in detail.

[Table and sewing machine frame]
The table 11 is used with its top surface parallel to the X-Y plane and in a horizontal state. The needle plate 15 is mounted at a needle drop position 15 a by the sewing needle 13 on the table 11. The needle plate 15 is formed with a needle hole into which two sewing needles 13 are individually inserted, and a slit through which the moving knife 14 of the knife mechanism is inserted.
In addition, a recess is formed on the table 11, and the bed portion 81 of the sewing machine frame 80 is stored. Furthermore, on the table 11, the large pressing and feeding mechanism 20 and the corner knife mechanism 90 are disposed on the downstream side of the sewing machine frame 80 in the cloth feeding direction, and on the upstream side of the cloth feeding direction It is arranged.
Further, at the time of the sewing operation of the ball edge sewing machine 10, the operator stands on the rear end side of the table 11 and performs the setting operation of the cloth C.

The sewing machine frame 80 mainly includes a bed portion 81 installed on the table 11, a standing barrel portion 82 erected therefrom, and an arm portion 83 extending horizontally from the upper portion thereof.
The sewing machine motor 16 is disposed below the sewing machine frame 80, and the bed portion 81 supports the lower shaft transmitting the rotational driving force of the hook mechanism from the sewing machine motor 16 along the Y axis direction. An upper shaft for transmitting the vertical movement driving force of the needle vertical movement mechanism from the sewing machine motor 16 is supported inside the arm portion 83 in a state along the Y-axis direction.
Pulleys are fixedly mounted on the upper shaft and the lower shaft, respectively, and are connected by a timing belt which is passed through the vertical body 82 of the sewing machine frame 80.

Needle up and down movement mechanism
The needle raising and lowering mechanism comprises two sewing needles 13 constituting a double needle, two needle bars for holding the respective sewing needles 13 of the double needle at the lower end, and each needle bar along its longitudinal direction. Of the upper and lower metal bearings that slidably support them, a needle bar holder that holds two needle bars at the same time, a sewing machine motor 16 serving as a vertical motion drive source of the needle bars, and A shaft, a rotary weight fixedly connected to one end of an upper shaft to perform rotational movement, and a crank rod having one end connected to a position eccentric to the rotational center of the rotary weight and the other end connected to a needle bar And have a known configuration.

When the upper shaft is rotated, the rotary weight rotates in the same manner, one end of the crank rod performs circular movement about the upper shaft, and the other end moves the movement component in the Z axis direction of the circular movement of one end. Only the needle bar is transmitted to the holder, and each needle bar moves up and down.
Then, a straight seam is formed along the X-axis direction with respect to the cloth C and the ball cloth conveyed along the X-axis direction.

[Female mechanism]
The knife mechanism includes a moving knife 14 forming a linear cut, a knife rod provided at the lower end with the knife 14 and supported so as to be vertically movable in the arm 83, and a drive source for the knife rod to move vertically. 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 female motor 17 is rotationally driven 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 corresponding to the width of the knife to form linear cuts.
The cutting edge of the moving knife 14 is formed along the X-axis direction, and forms a cut along the X-axis direction with respect to the cloth C and ball cloth conveyed along the X-axis direction.

[Kam mechanism]
The hook mechanism is provided in the bed portion 81 of the sewing machine frame 80. This hook mechanism is provided with two horizontal hooks individually corresponding to two sewing needles 13, a hook gear provided on the rotary shaft of each horizontal hook, and a lower shaft so as to individually rotate each hook gear. And a transmission gear for applying a driving force.
The lower shaft is given a rotational drive force from the output shaft of the sewing machine motor 16 by the timing belt. When the lower shaft is rotationally driven, rotational drive force is transmitted to the shuttle gear via each transmission gear, and each horizontal shuttle rotates via the shuttle shaft. Each horizontal hook catches a sewing thread from the sewing needle when the tip of the sewing needle 13 descends to the lower side of the needle plate 15, and rotates so that the loop of the sewing thread is passed through the horizontal hook to insert the lower thread. And entangle the sewing thread and the lower thread.

[Binder mechanism]
The binder mechanism has an inverted T-shaped cross section as viewed from the conveyance direction of the body fabric C, and supports the binder 12 so as to be able to lift and lower the binder 12 by setting so as to wind the ball cloth and feeding it along the longitudinal direction. And a support mechanism (not shown).
The binder 12 is composed of a bottom plate opposed to the upper surface of the table 11 and a standing plate vertically erected on the upper surface of the flat plate, and has a reverse T-like shape in cross section.
Further, the binder 12 is disposed behind the sewing needle 13 and is supported by the support mechanism such that the front end portion thereof approaches the sewing needle 13 when the binder 12 is lowered.
The support mechanism applies an air cylinder (not shown) serving as a drive source for raising and lowering operation of the binder 12, a solenoid valve 18 for driving the air cylinder, and driving force of the air cylinder to the binder 12 instead of moving force in the vertical direction. It has multiple link bodies.

  Then, at the time of sewing, the binder mechanism lowers the binder 12 by the air cylinder, and the Y-axis of the ball cloth so that the cross-sectional shape of the binder 12 is obtained by cooperation with the pair of large presses 21 of the large press feeding mechanism 20 described later. It is held by the pair of large pressing members 21 in a state in which both ends in the direction are folded back to the upper surface of the bottom plate of the binder 12, i.e., the binder 12 is wrapped and copied in an inverted T shape. Further, when the large presser 21 advances, the beaded cloth slides out of the binder 12 and is conveyed forward together with the fabric C while maintaining the state following the inverted T-shape, and is folded back along the bottom plate of the beaded binder 12. Needles are dropped at both ends of the double-layered fabric, and sewing on the cloth C is performed.

[Holder feed mechanism]
The large press feed mechanism 20 includes a pair of large presses 21 (one not shown) for pressing the dough C from above at positions on both sides sandwiching the sewing needle 13 and a support that supports these large presses 21 so as to be able to move up and down. 22, moving an air cylinder 23 for moving the presser 21 up and down with respect to the support 22, a solenoid valve 24 for controlling the drive of the air cylinder 23, and a cloth C held by the presser 21 in the cloth feeding direction And a ball screw mechanism 26 for converting the rotational drive force of the presser motor 25 into a linear drive force along the X-axis direction and transmitting it to the support 22.

Each of the large holding members 21 is a flat plate having a bowl shape in a cross sectional view and a rectangular shape in a plan view, and each of the large holding members 21 is supported by the support 22 with the longitudinal direction along the X axis direction. Then, it can be switched to upper and lower two positions by driving the air cylinder 23, and at the upper position, it is separated from the upper surface of the table 11, and is lowered to near the upper surface height of the table 11 at the lower position.
The ball screw mechanism 26 movably supports the support 22 on the table 11 along the X-axis direction, and the rear ends of the two large pressers 21 supported by the support 22 correspond to the rear end of the table 11. The movable range is set so as to move from the vicinity of the part to the vicinity of the corner knife mechanism 90 located on the front side of the sewing needle 13.

[Corner knife mechanism]
The corner knife mechanism 90 is disposed below the table 11 and in the passage path of the large press 21 by the large press feed mechanism 20, and the work of the corner knife 91 consisting of a pair of knife 91a and 91b by the large press feed mechanism 20. The body cloth C conveyed to the position is pierced through the corner knife 91 from below to form a substantially V-shaped cut V at the positions serving as both ends of the linear cut.
That is, the corner knife mechanism 90 includes an air cylinder 92 for moving the corner knife 91 up and down, a solenoid valve 93 for driving the air cylinder 92, and a drive motor 94 for moving and positioning the knife 91a along the X-axis direction. ing.
The corner knife 91 has a V-shaped cross section as viewed from above, and forms a V-shaped cut by piercing each body material from below.
That is, when the base material C on which the seams and the linear cuts are formed is conveyed by the large press feeding mechanism 20 to a predetermined position downstream of the moving knife 14 in the cloth feeding direction, the drive motor 94 is driven. After positioning the knife 91a at the lower position on one end side of the cut, the two knife 91a and 91b are raised to form two V-shaped cuts.

[Marking irradiation device]
The marking irradiation device 30 includes an elongated support plate 31 extending in a cantilever state from the upper surface of the tip of the arm portion 83 of the sewing machine frame 80 toward the upstream side in the cloth feeding direction, and one end of the support plate 31. Irradiation which is a stepping motor for rotating and driving one pulley 32 and a pulley 32, 32 for a belt respectively disposed at the other end, a transport belt 33 stretched between two pulleys 32, 32 A target positioning motor 34 as position driving means and a target position indicator 35 fixed to the belt 33 and arbitrarily positioned along the cloth feeding direction by rotation of the target positioning motor 34 are provided.
The target position indicator 35 includes, for example, an LED, a laser light source, and the like, and illuminates vertically downward a point mark which is, for example, a linear spot light.

The marking irradiation device 30 irradiates a range upstream in the cloth feeding direction with respect to the needle drop position 15a along a line along the X-axis direction passing through the middle point of the needle drop positions 15a of the two sewing needles 13. The target position indicator 35 is supported so as to be possible.
Specifically, the marking irradiation device 30 is a position at which two stitches to be stitched to be applied to the cloth C and the ball cloth at the back of the needle drop position 15a (sewing position) of the two sewing needles 13 A point mark is illuminated to indicate the front reference position F for alignment and the rear reference position R for alignment of the stitch end positions of the two stitches. The front reference position F and the rear reference position R are both fixed positions at which the distance from the sewing position is known, and the distance from the sewing position is recorded in the memory of the control device 60.
When the operator of the sewing machine is instructed to set these reference positions, the target position display 34 is conveyed to the front reference position F or the rear reference position R set in advance by driving the target positioning motor 34 and a point is issued. Irradiate the mark.
Thereby, the operator of the sewing machine can set the body cloth in an appropriate arrangement by aligning the reference position attached to the body cloth C with the irradiation position of the point mark on the table 11.

[Interlining supply device]
4 is a perspective view of the interlining supply device 40, FIG. 5 is a front view, and FIG. 6 is a cross-sectional view taken along the line V-V in FIG.
As shown in these figures, the interlining supply device 40 rotatably holds a roll Sr wound with a band-like interlining S, and the opening of the table 11 from the interlining holding unit 41 The guide portion 42 for guiding the strip-like interlining S to 111, the feeding drive portion 44 for delivering the strip-like interlining S to the opening 111, and the supply of the interlining S due to the conveyance of the large presser 21 are prevented And a cutting unit 48 for cutting the band-like interlining S in the vicinity of the opening 111.

The interlining holding portion 41 is located at the lower part of the interlining supply device 40, and supports a roll cover plate 411 that rotatably supports the roll Sr around the Y axis, and a roll mounting plate that fixes the roll cover plate 411 to the table 11. And 412.
The roll Sr is a roll formed by winding an endless band-like interlining S, and when it is supplied, it is cut at a cutting portion 48 described later when it is supplied from the opening 111 by a necessary length.

  The guide portion 42 has a flat plate-like first cross guide 421 along the YZ plane and a flat plate-like second cross guide 422 close to the first cross guide 421 and along the YZ plane. And a flat third cross guide 423 directed from the upper end of the first cross guide 421 to the opening 111 in the upper front, and a fourth flat guide in close proximity to the upper surface of the third cross guide 423. , And two guide plates 425 and 426 provided between the third and fourth cross guides 423 and 424 and the opening 111.

Each of the first to fourth cross guides 421 to 424 is a flat metal plate wider than the interlining S.
The lower end portion of the first cross guide 421 is curved in the forward direction, and the tip end portion of the first cross guide 421 is formed to be bent downward. Then, a slit along the Y-axis direction is opened at the tip end portion which is bent downward and formed.
The lower end of the second cross guide 422 is curved backward at substantially the same height as the curved portion of the first cross guide 421, and the upper end of the second cross guide 422 is the upper end of the first cross guide 421. It extends to the upper side of the part and is curved forward.
The first cross guide 421 and the second cross guide 422 are fixedly supported by a cross guide base 461 of a state switching unit 46 described later in a state in which the first cross guide 421 and the second cross guide 422 face each other with a gap therebetween.

  The strip-like interlining material S drawn from the roll Sr passes through the slit of the first cross guide 421, passes between the first cross guide 421 and the second cross guide 422, and is the upper end of the second cross guide 422. It is guided to the rear end portion of the third and fourth cross guides 423, 424 from the curved portion of the portion.

The third cross guide 423 and the fourth cross guide 424 are fixedly supported by the support block 441 of the feed drive unit 44 in a state of being closely opposed and lined up and down.
The rear ends of the third and fourth cross guides 423, 424 are close to the upper end of the second cross guide 422, and the upper end of the second cross guide 422 and the third and fourth cross guides A main movement feed roller 442 of the feeding drive unit 44 described later is disposed between the rear end portions of the sheet 423 and 424. The drive feed roller 442 is disposed such that the outer circumferential surface is in contact with the interlining material S extending from the second cross guide 422 to the third and fourth cross guides 423 and 424.
The interlining material S passing through the first and second cross guides 421 and 422 is guided to the front of the opening 111 by the third and fourth cross guides 423 and 424.

The opening 111 of the table 11 is on the extension of the third and fourth cross guides 423 and 424, and two guide plates 425 and 426 are disposed in front of it. The guide plates 425 and 426 are fixedly mounted on the lower surface side of the table 11 so that the third and fourth cross guides 423 and 424 sides are open, and the width gradually decreases toward the opening 111. As described above, the two guide plates 425 and 426 pass the third and fourth cross guides 423 and 424 because the third and fourth cross guides 423 and 244 are opened and gradually narrowed. The interlining S is accurately guided to the opening 111.
A moving knife 481 and a fixed knife 482 of the cutting unit 48 are disposed between the third and fourth cross guides 423 and 424 and the two guide plates 425 and 426.

  The feeding drive unit 44 includes a support block 441 fixedly supported on the table 11 above the interlining holding unit 41, and a main movement feed roller 442 rotatably supported around the Y axis at the rear end of the support block 441; The driven feed roller 443 supported rotatably around the Y axis by the cross guide base 461 described above, the delivery motor 444 serving as a drive source for the delivery operation of the interlining S, and the table 11 are fixed and support the delivery motor 444 Motor mounting plate 445, a main driving sprocket 446 provided on the output shaft of the delivery motor 444, a driven sprocket 447 concentrically connected to the main driving feed roller 442, a bridge between the main driving sprocket 446 and the driven sprocket 447 Equipped with a timing belt 448

The feeding drive unit 44 performs a feeding operation until the leading end of the interlining S drawn out from the roll Sr of the interlining holding unit 41 is extended from the opening 111 of the table 11 by a predetermined length. It is a mechanism. When the interlining S is extended outward from the opening portion 111 by a certain length, it is captured by friction with the lower surface of the large presser 21 or the lower surface of the held fabric of the large presser 21 and conveyed together with the large presser 21. Ru. The predetermined length of the tip end portion of the interlining S that the extension drive unit 44 unrolls from the opening 111 indicates a necessary and sufficient length that enables the large press 21 to capture the interlining S and pull it out in the transport direction. .
That is, the delivery drive unit 44 performs delivery of the leading end of the interlining S, and does not contribute to the conveyance of the interlining S during sewing.
The opening 111 for feeding out the interlining S is formed at the front reference position on the top surface of the table 11.

In the delivery drive unit 44, the torque of the delivery motor 444 is transmitted from the main driving sprocket 446 to the driven sprocket 447 through the timing belt 448 to rotate the main feeding roller 442.
The driven feed roller 443 has a diameter smaller than that of the drive feed roller 442, and can be in contact with the upper portion of the outer peripheral surface of the drive feed roller 442. The cross guide base 461 that supports the driven feed roller 443 is attached to the support block 441 so as to be pivotable about the Y axis at a position forward of the driven feed roller 443. Thus, the driven feed roller 443 can be swung up and down, and the position can be switched between a state in which the driven feed roller 443 is in contact with the outer peripheral surface of the main movement feed roller 442 and a state in which the driven feed roller 443 is separated upward.
When feeding the interlining S to the opening 111, the driven feed roller 443 is in contact with the drive feed roller 442 by the weight of the cross guide base 461 and the driven feed roller 443. The feed roller 443 and the feed roller 443 can hold the interlining S with an appropriate load, and the interlining S can be transported without idling of the drive feed roller 442.

  The state switching unit 46 includes a cross guide base 461 pivotally supported by the support block 441 of the delivery drive unit 44 described above, and a release air cylinder 462 that pushes the driven feed roller 443 upward via the cross guide base 461. And a lock air cylinder 463 for pressing down the driven feed roller 443 downward via the cross guide base 461 and a cylinder base 464 supporting the air cylinders 462 and 463.

  The cross guide base 461 includes a main body 461a which is a rectangular flat plate along the YZ plane, a pair of arms 461b extending forward from both ends in the Y-axis direction of the front upper end of the main body 461a, and the main body And a contact plate 461c provided in the vicinity of the upper end of the rear surface of the portion 461a, against which the plunger of the release air cylinder 462 abuts.

  The front end portions of the pair of arm portions 461 b are rotatably connected to the support block 441 of the feed drive portion 44 about the Y axis, and the middle portions of the pair of arm portions 461 b are both ends of the driven feed roller 443 The parts are rotatably supported individually.

  In addition, the main body portion 461a holds the first cross guide 421 and the second cross guide 422 on the front side. The first cross guide 421 and the second cross guide 422 extend below the lower end of the main body 461a.

The release air cylinder 462 is fixedly supported by the cylinder base 464 in a state where the plunger can be protruded upward. A contact plate 461c extending rearward from the upper end of the rear surface of the main body 461a of the cross guide base 461 is disposed above the plunger of the release air cylinder 462, and the projection of the plunger makes the contact plate The rear end portion of the cross guide base 461 can be pushed upward through 461 c.
As a result, as shown in FIG. 7, the driven feed roller 443 supported by the pair of arms 461 b can be separated from the driving feed roller 442, and the roller S 442, 443 releases the core S from restraint. be able to. When the interlining S is captured by the large presser 21 and transported, such a release state is set, and the respective rollers 442 and 443 do not give resistance to the interlining S to be pulled out.

The locking air cylinder 463 is fixedly supported by the cylinder base 464 in a state where the plunger can be protruded forward. A second cross guide 422 extending downward from the lower end of the main body 461 a of the cross guide base 461 is disposed in front of the plunger of the locking air cylinder 463. The rear end portion of the cross guide base 461 can be pushed downward via the cross guide 422 of FIG.
As a result, as shown in FIG. 8, the driven feed roller 443 supported by the pair of arms 461 b can be pressed against the driving feed roller 442, and the interlining S passing between the rollers 442 and 443 is It can be restrained against the presser 21.

As described above, by setting the release air cylinder 462 in the plunger retracted state and the lock air cylinder 463 in the plunger projection state, the driven feed roller 443 is brought into pressure contact with the main movement feed roller 442. A "state" or "a state in which the supply is blocked" can be formed.
Further, by setting the release air cylinder 462 in the plunger projection state and the lock air cylinder 463 in the plunger retraction state, the driven feed roller 443 is separated upward, and the interlining S can be supplied in a “supplyable state” or It is possible to form a state of "unblocked".
In addition, when both the release air cylinder 462 and the lock air cylinder 463 are in the plunger retracted state, the driven feed roller 443 is in contact with the drive feed roller 442 by its own weight, and this state is "neutral". I assume.
That is, the release air cylinder 462 and the lock air cylinder 463 function as “an actuator that switches between the state in which supply can be performed and the state in which supply can not be performed along with the conveyance of the interlining S 21.

The cutting unit 48 is fixed to the lower surface of the table 11 with the moving knife 481 moving upward and downward with the blade tip upward at the upper front end of the support block 441 of the feeding drive unit 44 and the cutting blade facing the moving knife 481. The fixed knife 482 and a knife air cylinder 483 for giving rise and fall movement of a moving knife 481 mounted on the upper front end of the support block 441 are provided.
The moving knife 481 and the fixed knife 482 are disposed between the front end of the third and fourth cross guides 423 and 242 and the rear end of the two guide plates 425 and 426 as described above. Can be cut by the upward movement of the moving knife 481.

[Control system of ball edge sewing machine]
As shown in FIG. 3, the control device 60 includes a display panel 64 for displaying various settings related to sewing and the current state of the sewing machine, and screen selection and commands for performing various settings juxtaposed to the display panel 64. A setting switch 65 as setting input means for inputting numerical values and an operation pedal 68 for inputting start of sewing are connected via an input / output circuit (not shown).

  The operation pedal 68 is means for inputting a drive command of the sewing operation to the control device 60 by a stepping operation. That is, when the operation pedal 68 is depressed, the control device 60 performs operation control to start sewing.

From the setting switch 65, in addition to various parameters for performing the ball edge sewing, for example, the sewing pitch and the rotational speed of the sewing machine motor 16, the ball edge sewing which is a parameter at the time of sewing the interlining S shown in FIG. Sewing length c, setting of body cloth C and ball cloth with the front reference or the rear reference, the sewing start side length a which is the length from the front end of the interlining S to the sewing start position, the core The operator performs setting input such as a sewing end length b which is a length from the rear end portion of the ground S to the sewing end position.
Since the sum of the sewing length c, the sewing start side length a and the sewing end side length b corresponds to the length of the interlining material S to be supplied, the setting switch 65 It functions as "Length setting part to set the length".
The distance Fc from the front reference position F to the sewing position N and the distance Rc from the rear reference position R to the sewing position N shown in FIG. 9 are fixed values, and the control device 60 always stores the values.

Further, in the control device 60, the sewing machine motor 16, the pressing motor 25, the female motor 17, the drive motor 94 for the corner knife, the target positioning motor 34, and the feed motor 444 for the control are respectively drivers 16a, 25a, 17a, It is connected via 94a, 34a and 444a.
In addition, an encoder 251 for detecting the amount of rotation is attached to the pressing motor 25. The encoder 251 is connected to the control device 60 via a counter 251a that counts the output pulse.
The control device 60 also includes an air cylinder for moving the binder 12 up and down, an air cylinder 23 for moving the presser foot 21 up and down, an air cylinder 92 for moving the corner knife 91 up and down, and an air cylinder for releasing the interlining supply device 40. 462, solenoid valves 18, 24, 93, 465, 466, 484 for controlling the operation of the locking air cylinder 463 and the female air cylinder 483 are connected via the drivers 18a, 24a, 93a, 54a, 26a, 27a There is.
Furthermore, the light source of the target position indicator 35 is connected to the control device 60 via a driver 35a.

The control device 60 is provided with a CPU 61 for performing various controls, a control program for executing various functions and operations to be described later of the ball edge sewing machine 10, and a memory 62 in which control data or various sewing data are written.
In the memory 62, various parameters (a sewing pitch, a rotation speed of the sewing machine motor 16, a set of the cloth C and a ball cloth) for performing the beading stitch inputted from the setting switch 65 are used as a front standard or a rear standard. The sewing start side length a of the interlining S, the sewing end side length b of the interlining S, and the like are all stored. That is, the memory 62 functions as a storage unit.

  The above-mentioned CPU 61 solves the problem that the interlining material S is drawn out by an extra length and sewing is performed when the body fabric C and the ball cloth are set at the rear reference position R by the control program stored in the ROM 62 In order to do this, at the time of sewing at the rear reference position R, the release air cylinder 462 and the lock air cylinder 463 are controlled at an appropriate timing to release the blocking from the “supply blocking state” for the interlining S. By switching to the state where it is "on", interlining supply control is performed to align the tip of the interlining S with respect to the fabric.

[Sewing operation including interlining supply control at the rear reference position]
Sewing operation control including interlining supply control in the case where sewing is performed by arranging the fabric at the rear reference position R will be described in detail with reference to the timing chart of FIG. 10 and the flowchart of FIG.
Before the start of sewing, the front end of the interlining S is fed forward from the opening 111 by the sewing start side length a (see FIG. 9), and the air cylinder 462 for releasing the interlining supply device 40 Is controlled to be in the plunger retracted state, and the locking air cylinder 463 is controlled to be in the plunger projecting state, and it is premised that the driven feed roller 443 is in the state of blocking supply of the interlining S (state of FIG. 8).

In the above state, when the operator inputs the start of sewing by the operation pedal 68, the CPU 61 of the control device 60 controls the target positioning motor 34 and the target position indicator 35 to make the back reference of the upper surface of the table 11 The position is irradiated (step S1).
Then, when the operator aligns the sewing end position of the fabric to the back reference position R and sets it on the table 11 and the operation pedal 68 is depressed again to indicate the completion of the setting (step S3), the CPU 61 The air cylinder 23 is controlled to lower the presser foot 21, and the fabric is held at the rear reference position (step S5).

Further, the CPU 61 starts driving the pressing motor 25 to start conveyance of the fabric to the sewing position N (step S7, FIG. 10: T1).
The CPU 61 of the control device 60 performs the large pressing and feeding mechanism 20 so that the first transfer speed of the fabric before the start of sewing (idle feed) becomes high and the second transfer speed of the fabric after start of sewing becomes low. Control the pressing motor 25 of That is, the conveyance from the start of conveyance to the start of sewing is performed at high speed.

  Next, the CPU 61 determines from the pulse count value of the encoder 251 of the pressing motor 25 whether or not the fabric has reached the interlining supply position (step S9). The interlining supply position is determined based on whether or not the sewing start position of the fabric has reached the opening 111 (front reference position), and therefore, it has advanced by a distance (Rc-c-Fc) from the start of conveyance.

If the cloth has not reached the interlining supply position, the determination is repeatedly performed, and if it reaches (FIG. 10: T2), the CPU 61 causes the release air cylinder 462 to be in the plunger projecting state and the locking air cylinder 463 to be in the plunger retraction state. The control is performed, and the driven feed roller 443 is separated upward, and is switched to the “state in which the supply of the interlining S is released” (the state in FIG. 7, step S11).
As a result, the interlining S is unrestrained by the driven feed roller 443 and pulled forward due to the friction with the fabric held by the presser 21, and is transported together with the fabric.

  Next, the CPU 61 determines from the pulse count value of the encoder 251 of the pressing motor 25 whether or not the sewing start position of the fabric has reached the sewing position N (step S13). The arrival of the sewing position N is determined by whether or not it has advanced by a distance (Rc-c) from the start of conveyance.

If the cloth does not reach the sewing position N, the determination is repeatedly performed, and when it reaches (FIG. 10: T3), the CPU 61 stops driving the pressing motor 25 momentarily and then restarts driving at low speed. Switching to the conveyance of (step S15). Further, the sewing machine motor 16 is started in synchronization with the stop of the pressing motor 25 to start sewing by the up and down movement of the two sewing needles 13.
Since the presser motor 25 can not actually stop instantaneously and gradually decelerates and stops, the arrival of the sewing position N in step S13 is strictly the presser motor 25 more than the sewing position N. Determine the arrival of the previous position by the distance required to stop the

Next, the CPU 61 determines from the pulse count value of the encoder 251 of the pressing motor 25 whether the planned end position of the interlining S has reached the interlining cut position (step S17).
The interlining cut position indicates that the planned end position of the interlining S has reached the cutting position of the cutting portion 48. The planned end position of the interlining S is a position rearward of the sewing end position by a length b on the sewing end side, and the cutting position of the cutting portion 48 is a distance n behind the opening 111 (front reference position) Then, the arrival of the interlining cut position is determined by whether or not it has advanced by the distance (Rc + b-Fc-n) from the start of conveyance.

  If the cloth has not reached the interlining cut position, the determination is repeatedly executed, and if it reaches (FIG. 10: T4), the CPU 61 sets the release air cylinder 462 in the plunger retracted state and the knife air cylinder 483 in the plunger projecting state. The control is performed to bring the driven feed roller 443 into a neutral state, and the interlining S is cut off (step S19 in FIG. 6).

Next, the CPU 61 determines from the pulse count value of the encoder 251 of the pressing motor 25 whether the sewing end position of the interlining S has reached the sewing position N (step S21).
The arrival of the sewing end position at the sewing position N is determined depending on whether or not it has advanced by the distance Rc from the conveyance start.
If the sewing end position of the interlining S has not reached the sewing position N, the determination is repeatedly executed (FIG. 10: T5), and the CPU 61 stops driving the sewing machine motor 16 (step S23).

Then, the forward movement of the large presser 21 is continued, the fabric is transported to the corner knife mechanism 90, and V-shaped cuts are formed at both ends of the sewing location (step S25, FIG. 10: T6).
Furthermore, when the entire cloth is transported to the front of the opening 111 (FIG. 10: T7), the CPU 61 executes the feeding of the interlining material for the next sewing.
At this time, the plunger of the female air cylinder 483 is retracted to allow passage of the interlining material S. Further, since the driven feed roller 443 is already at the neutral position, the conveyance of the interlining S is possible by driving the main feed roller 442.
Since the interlining S needs to feed forward from the opening 111 by the sewing start length a, the feed motor 444 is driven by the total distance a + n from the cutting position of the cutting part 48 described above to the distance n from the opening 111 (Step S27).

At the timing when the feeding of the interlining S is completed (FIG. 10: T8), the CPU 61 causes the plunger of the locking air cylinder 463 to protrude and restrains the interlining S (step S29).
After that, when the fabric is conveyed to the conveyance end position, the driving of the pressing motor 25 is stopped and the sewing operation is ended.

  The sewing start side length a in the interlining S is made equal to the advance length, but as shown in FIG. 12, the timing of the interlining supply position T2 is as shown by the arrow L in the figure. It is adjustable by fluctuating back and forth. For example, when the interlining feed position T2 is changed earlier, the sewing start side length a can be made longer than the advance length, and when the interlining feed position T2 is further delayed, the sewing start side length a is pre Can be shorter than the delivery length of

  Further, as shown in FIG. 12, the end-of-stitch side length b in the interlining S can be adjusted by changing the timing of the interlining cutting position T4 back and forth as shown by the arrow K in the figure. For example, when the interlining cut position T4 is changed earlier, the sewn end length b can be shortened, and when the interposition cut position T4 is further retarded, the sewn end length b can be increased.

[Sewing operation including interlining supply control at front reference position]
The sewing operation control including the interlining supply control in the case of sewing by arranging the cloth at the front reference position F is the same except for a part of the sewing operation including the interlining supply control of the post reference position R described above . The different points will be described with reference to the timing chart of FIG. 10 and the flowchart of FIG.

Since the ball-edge-stitched sewing machine 10 is arranged such that the opening 111 through which the interlining S is fed out coincides with the front reference position F, in the case of a sewing operation including interlining supply control at the front reference position, Supply of the ground S is also started.
Therefore, in the timing chart of FIG. 10, the release air cylinder 462 is set to the plunger projecting state and the locking air cylinder 463 is set to the plunger retraction state at the fabric conveyance start position T1 to start the fabric conveyance. If the period from the position T1 to the sewing position T3 is changed to be shorter, the timing chart of the sewing operation including the control of feeding the inter-base of the front reference position is obtained.

  Further, with respect to the flowchart of FIG. 11, the determination of the arrival at the center supply position T2 in step S9 is omitted, and the plunger protruding state of the release air cylinder 462 in step S11 and the plunger retracted state of the locking air cylinder 463 If the operation control of step S7 is changed to the content to be executed at the same time as the start of driving of the pressing motor 25 in step S7, the flowchart of the sewing operation including the control of feeding the inter-base of the front reference position is obtained.

[Effect of the embodiment]
The ball edge sewing machine 10 arranges the fabric at either the front reference position F for aligning the sewing start position of the fabric or the rear reference position R for aligning the sewing end position of the fabric set on the upper surface of the table 11 The control device 60 controls the sewing machine motor 16 and the large pressing and feeding mechanism 20 so as to perform sewing from the sewing start position to the sewing end position with respect to the transported fabric in accordance with the selection.
In addition, the interlining supply device 40 includes a release air cylinder 462 and a lock air cylinder 463 that switch the supply possible state and the non-supplyable state according to the conveyance of the interlining S 21 by the large pressing 21. The release air cylinder 462 and the lock air are arranged so that alignment of the sewing start position of the interlining S is performed with respect to the fabric transported by the large presser 21 when the fabric is placed at the rear reference position. The state switching by the cylinder 463 is controlled.
Thereby, when the cloth is disposed at the rear reference position, it is avoided that the feeding of the interlining S is started with the start of the conveyance of the large presser 21, and the interlining S of the extra length is performed. And the seam can be formed at the planned position on the interlining S. Therefore, in the case of sewing at either the reference position or the rear reference position, the interlining can be supplied at an appropriate position with respect to the fabric, and the operation of cutting off the extra interlining after sewing is unnecessary. It becomes possible.

  In addition, the release air cylinder 462 and the lock air cylinder 463 of the interlining supply device 40 supply the interlining S in a state in which it can be supplied along with the conveyance of the high pretension 21 against the high pretension 21. Since switching is made between a blocking state and a blocking state, the occurrence of a supply failure as compared with the case where the leading end of the interlining S is normally inserted below the large presser 21 at a necessary timing as a retracted state. As a result, the reliability of the feeding operation can be reduced, and the positional deviation of the interlining can be reduced to perform sewing with high accuracy.

Further, the ball edge sewing machine 10 is provided with a setting switch 65 as a length setting unit, and the interlining supply device 40 has a cutting portion 48 for cutting the supplied interlining S, and the control device 60 When the interlining S is pulled out by the set length, the cutting section 48 is controlled so as to cut the interlining S.
As a result, in the ball edge sewing machine 10, the length of the feed S can be set arbitrarily.
In addition, since the setting switch 65 arbitrarily sets the sewing length c, the sewing start side length a, and the sewing end side length b, these parameters can be arbitrarily adjusted, and various colors can be used as necessary. It is possible to sew the interlining S.

[Another Example of Interlining Supply Control (1)]
In the ball-edge sewing machine 10, the leading end of the interlining S is made to be captured by the large presser 21 moving forward in a state where it is extended in advance from the opening 111 and supplied. In the case of moving at the same time, there is a risk that the interlining S slips and the large presser 21 can not be captured and can not be supplied.
Therefore, as shown in FIG. 13, when the fabric reaches the interlining supply position (FIG. 13: T2), the CPU 61 momentarily stops driving the pressing motor 25 and then restarts driving again. It may be controlled to return to high speed transport.
As a result, the leading end of the interlining S is more reliably captured by the large presser 21, and it becomes possible to reduce the occurrence of supply failure of the interlining S.

  In the examples shown in FIGS. 11 and 13, the pressing motor 25 is controlled to be stopped momentarily at the start of sewing or at the time of switching of the conveyance speed of the fabric or at the time of supply of the interlining. Not only stopping, but also control may be performed to temporarily decelerate.

[Another Example of Interlining Supply Control (2)]
As described above, in the ball-edge sewing machine 10, the pressing motor 25 is controlled to convey at high speed in the case of idle feeding without sewing and to convey at low speed in the case of sewing.
In this case, if the length of the interlining S to be used is short, as shown in FIG. 14, the interlining cut position T4 may be reached before reaching the sewing position T3.
In such a case, the fabric and the interlining S have to be cut at the end of the interlining by means of the cutting unit 48 while feeding at the speed of idle feeding, that is, at high speed.
However, it is difficult to accurately cut the end portion of the interlining S pulled out at high speed, and there is a possibility that the forming precision of the length of the interlining S and the end length b on the sewing end may be reduced.

Therefore, when the arrival of the interlining S at the interlining cut position T4 precedes the arrival of the sewing start position at the sewing position T3, the pressing motor 25 is driven at the time of reaching the interlining supply position T2 of the fabric. Interlining supply control may be performed by further improving the control of FIG. 13 for stopping momentarily.
Specifically, as shown in FIG. 14, when reaching the interlining supply position T2 and stopping the driving of the pressing motor 25 momentarily and then resuming the driving, at this time, the high idle feeding speed is reached. Instead, the pressing motor 25 is controlled so as to switch to a low feed rate at the time of conveyance accompanied by sewing.

  As described above, by switching the conveyance by the pressing motor 25 to a low speed after the interlining supply position T2, the interlining at the cutting portion 48 is obtained even when the interlining cut position T4 is before the sewing position T3. It becomes possible to cut the end of the S at low speed with high accuracy.

Note that whether the arrival of the interlining cut position T4 comes before the arrival of the sewing position T3 is determined in advance by the CPU 61 of the control device 60 from the setting values of various parameters for performing the ball edge sewing, Decide on the execution of the above control.
That is, if the conveyance distance (Rc + b-Fc-n) to reach the interlining cut position T4 is smaller than the conveyance distance (Rc-c) to reach the sewing position T3, the conveyance speed after the interlining supply position T2 is made low. Control to switch should be performed. If the execution condition is further simplified, the control device 60 determines to execute control to switch the transport speed after the interlining supply position T2 to a low speed when Fc + n> b + c.

A flowchart for executing the process of FIG. 14 is shown in FIG.
The CPU 61 executes the irradiation of the rear reference position by the target position indicator 35 by the input of the start of sewing by the operation pedal 68 (step S31), the setting of the fabric based on this is completed, and the operation pedal 68 is again When it is stepped on (step S33), the large presser 21 is lowered (step S35), and driving of high speed conveyance by the press motor 25 is started (step S37, FIG. 14: T1).

Next, the CPU 61 determines whether or not the cloth has reached the interlining supply position (step S39), and when it reaches (FIG. 14: T2), the CPU 61 instantaneously stops driving the pressing motor 25. The driving is restarted from the step S40 to switch to low speed conveyance (step S41).
Furthermore, the CPU 61 controls the release air cylinder 462 in the plunger projection state and the lock air cylinder 463 in the plunger retraction state, and switches the supply of the interlining S to the “state in which the inhibition of the supply is canceled” (step S43). Thus, the interlining S is transported together with the fabric.

  Next, the CPU 61 determines whether the planned end position of the interlining S has reached the interlining cut position (step S45), and when it reaches (FIG. 14: T4), the CPU 61 releases the air cylinder 462 for release. The plunger retracting state, the knife air cylinder 483 is controlled to the plunger projecting state, and the interlining S is cut (step S47).

Next, the CPU 61 determines whether or not the cloth has reached the sewing position N (step S49), and when it reaches (FIG. 14: T3), the CPU 61 causes the driving of the pressing motor 25 to be stopped momentarily. The driving is resumed, and the low speed transportation is performed again (step S51).
Thereafter, the CPU 61 determines whether or not the sewing end position of the interlining S has reached the sewing position N (step S53), and when it reaches (FIG. 14: T5), the CPU 61 stops the driving of the sewing machine motor 16. (Step S55).

Then, the cloth is conveyed to the corner knife mechanism 90, and V-shaped cuts are formed at both ends of the sewing portion (step S57, FIG. 14: T6).
Further, when the entire cloth is transported to the front of the opening 111 (FIG. 14: T7), the CPU 61 retracts the plunger of the female air cylinder 483 and causes the feeding motor 444 to feed the interlining (step S59). ).

When the feeding of the interlining S is completed (FIG. 14: T8), the CPU 61 causes the plunger of the locking air cylinder 463 to protrude and restrains the interlining S (step S61).
Further, when the cloth is conveyed to the conveyance end position, the driving of the pressing motor 25 is stopped and the sewing operation is ended.

  Thus, when the control device 60 is held by the large presser 21 and the interlining S starts to be transported, as shown by the interlining supply position T2 in FIG. 13 and FIG. 14 and step S41 in FIG. Since the large press feed mechanism 20 is controlled to reduce or stop the transport speed by the feed mechanism 20, the occurrence of the capture failure of the interlining S due to the large press 21 caused by the slip or the like can be reduced. Thus, it is possible to improve the reliability of the feeding operation and to perform the sewing with high accuracy by reducing the positional deviation of the interlining S.

Further, as described above, the CPU 61 of the control device 60 causes the first conveyance speed of the fabric before the start of sewing (idle feed) to be high, and the second conveyance speed of the fabric after the start of sewing to be low. It is premised that the pressing motor 25 of the large press feeding mechanism 20 is controlled (see step S15 in FIG. 11).
Then, the control device 60 determines whether or not the cutting of the interlining S by the cutting unit 48 is performed before the start of sewing based on the length (a, b, c) of the interlining set by the length setting unit (sewing) When it is determined whether arrival of the interlining cut position T4 comes earlier than arrival of the position T3 and the cutting of the interlining S is performed before the start of sewing, the sewing start position is the interlining supply position T2 After that, by controlling the pressing motor 25 so as to decelerate and transport after that (step S41 in FIG. 15), the transport speed at the time of cutting the interlining S is higher than the first transport speed. It is made to be low speed (the same speed as the second transport speed).
As a result, it is possible to cut the end of the interlining S pulled out at a low speed, and it becomes possible to cut with a more accurate length, thereby improving the formation accuracy of the interlining S length and the sewing end length b. It is possible to

[Others]
The ball-edge sewing machine 10 releases the release air cylinder 462 and the lock air cylinder while keeping the state that the leading end portion of the interlining S is partially extended from the opening portion 111 and can be captured by the large presser 21. Control is performed so as not to be pulled out by the large presser 21 by controlling 463, and control is performed to release the restraint at a necessary timing and to supply the interlining S.
However, the supply of the interlining S is not limited to the above configuration.
For example, the leading end of the interlining S does not extend from the opening 111 and stands by in a state where the large presser 21 can not be captured, and controls the feed motor 444 at a necessary timing to feed out from the opening 111 May be captured by the large presser 21 and supplied.
In this case, it functions as an actuator that switches between a state in which the feed motor 444 can supply and a state in which it can not supply.

By this, it becomes possible to make the locking air cylinder 463 unnecessary.
Further, the driven roller 443 may be maintained in the released state while the interlining material S is captured and conveyed by the large press 21 with the release air cylinder 462 remaining. In addition, the release air cylinder 462 may be removed, and the feeding motor 444 may be driven to support the supply of the interlining S while the interlining S is captured and conveyed by the large presser 21.

In the case of supplying the interlining S according to the above configuration, if the interlining S is a soft cloth or a thin cloth, it is difficult to feed the interlining to the lower side of the large presser 21 moving from the opening 111 May be
In such a case, an auxiliary roller rotatably supported around the Y axis is disposed on the front side of the opening 111, and the height of the upper end portion of the outer peripheral surface of the auxiliary roller is the height of the upper surface of the table 11. It is desirable to arrange them approximately equally. In this case, since the outer peripheral surface of the auxiliary roller abuts on the lower surface of the large presser 21 to cause a follower, the tip end of the interlining S fed out from the opening 111 may be fed to the lower side of the large presser 21 by the auxiliary roller. It is possible to realize the supply of the proper interlining S.

DESCRIPTION OF SYMBOLS 10 ball edge sewing machine 11 table 12 binder 13 sewing needle 14 moving knife 15 needle plate 16 sewing machine motor 20 large press feed mechanism 21 large press 25 press motor 40 interlining supply device 41 interlining holding part 42 guide part 44 driving part 46 state Switching unit 48 Cutting unit 60 Control device 61 CPU
62 Memory 64 Display Panel 65 Setting Switch (Length Setting Section)
68 Operation pedal 90 Corner knife mechanism 111 Opening 251 Encoder 441 Support block 442 Drive feed roller 443 Driven feed roller 444 Feeding out motor 462 Air cylinder (actuator) for release
463 Locking air cylinder (actuator)
481 Moving knife 482 Fixed knife 483 Air cylinder for female C Body fabric (cloth)
F Front reference position N Sewing position R Back reference position S Interlining Sr roll

Claims (6)

A large presser feeding mechanism having a large presser that presses the fabric placed on the table from above and conveys it toward the sewing position;
A sewing machine motor for performing sewing on the fabric;
An interlining supply device which holds a roll of interlining wound below the table and supplies the interlining from an opening of the top surface of the table;
Transfer according to whether the cloth is placed at the front reference position for aligning the sewing start position of the cloth or at the back reference position for aligning the sewing end position of the cloth set on the upper surface of the table A control device for performing sewing from the sewing start position to the sewing end position with respect to the fabric to be
The interlining supply device includes an actuator that switches between a state in which the interlining can be supplied and a state in which the interlining can not be performed, according to the conveyance of the large press;
The control device causes the actuator to align the sewing start position of the interlining with respect to the fabric conveyed by the large pressing when the fabric is disposed at the back reference position. A ball edge sewing machine characterized by controlling state switching.   The actuator of the interlining supply device is configured to stop the supply against the interlining against the interlocking with respect to the interlining being capable of being supplied along with the transportation of the intercrossing, and the state of releasing the interlocking, 2. The ball edge sewing machine according to claim 1, wherein:   The ball-edge-stitched sewing machine according to claim 1, wherein the actuator of the interlining supply device performs unwinding to a position where the interlining can be supplied as the large presser is conveyed.   The control device is characterized by controlling the large pressing feed mechanism so as to reduce or stop the transfer speed by the large pressing feed mechanism when the large base is held by the large press and the interlining material starts to be transported. The ball edge sewing machine according to any one of claims 1 to 3. A length setting unit for setting the length of the interlining to be supplied;
The interlining supply device has a cutting unit for cutting the supplied interlining,
The control device controls the cutting portion to cut the interlining when the interlining is drawn by the set length by the large pressing. The ball edge sewing machine according to any one of the above. The control device controls the large pressing and feeding mechanism such that a first conveying speed of the fabric before the start of sewing becomes higher than a second conveying speed of the fabric after the start of sewing;
The controller is
From the length of the interlining set by the length setting unit, it is determined whether or not the cutting of the interlining by the cutting unit is performed before the start of the sewing.
If the cutting of the interlining is performed before the start of the sewing, controlling the large press feeding mechanism so that the conveying speed at the time of cutting of the interlining becomes lower than the first conveying speed The ball edge sewing machine according to claim 5, characterized in that:

Images