CN104818587A - Sewing machine - Google Patents

Abstract

The invention provides a sewing machine, which prevents additional winding of needle tracking and enables needle dropping holes of a cutting needle to be appropriately formed. The sewing machine includes a needle bar (12), a kettle (13), a sewing machine motor (21), a needle bar rotation mechanism (30), which allows a needle bar to rotate around its axis along the vertical direction, a thread-pulling mechanism (50), which pulls a bobbin thread, a moving mechanism (80), which moves a sewed workpiece as desired, and a control part (90), which controls the moving mechanism according to sewing data. A sewing needle is the cutting needle (11) for forming the slot-shaped needle dropping holes of the sewed workpiece. A control part corresponding to the movement direction of a piece of cloth executes rotation control of the needle bar by using the needle bar rotation mechanism to form needle tracking, each of which is relative to the movement direction of the piece of cloth of the sewed workpiece with an arbitrary inclination angle. Furthermore, the control part, in a situation that the movement direction of the piece of cloth is in the predetermined range of a thread-pulling angle, executes thread-pulling control via the thread-pulling mechanism.

Description

Sewing machines

Technical field

The present invention relates to a kind of Sewing machines for needle tracking of realizing ideal.

Background technology

In the stitching formed utilizing Sewing machines, there are following two kinds of stitchings: desirable needle tracking (with reference to Figure 26 (A)), it is wound around reaching the standard grade and rolling off the production line with state evenly neat each other and is formed; And adding cast-over mark (with reference to Figure 26 (B)), it is formed in the mode describing spiral of only reaching the standard grade.As desirable needle tracking, the tension force of reaching the standard grade and the balancing each other property of tension force rolled off the production line, well to cloth effect, become good finished product, can provide the sewing object that quality of sewing is high.On the other hand, add cast-over mark and there is following problems, that is, the tension force of reaching the standard grade easily dies down, and the equalization of strain rolled off the production line is poor, the baneful influence such as easily cause that stitching fluffs, and easily causes quality of sewing to reduce.

In the Sewing machines by maintenance cloth and by this cloth to any direction conveying according to the tailoring pattern formation stitching of regulation, reach the standard grade relative to the winding direction of suture needle and carry out falling pin across which side of lower alignment of the pin hole extending to needle plate from still, change along with the moving direction of cloth, these become the producing cause adding cast-over mark.

Therefore, in existing Sewing machines, investigate the angular range of reaching the standard grade relative to the variation of the winding direction of suture needle and the cloth moving direction relative to the needle downing position generation variation across 2 regions of rolling off the production line in advance, add in the angular range of cast-over mark in generation, perform needle bar rotation or roll off the production line hold together line, avoid adding cast-over mark (for example, referring to patent document 1).

Patent document 1: Japanese Unexamined Patent Publication 2012-213603 publication

In addition, research in recent years is to the Sewing machines application cutting knife pin of patent document 1, and this cutting knife pin front end is formed as flat, the sewn object be made up of is formed to the needle falling hole of in-line leather etc.

Cutting knife pin as shown in figure 27, the needle falling hole h that spacing forms in-line is made with fixing, the needle falling hole h of this in-line is relative to forming the cloth moving direction F of stitching Uk with fixing angular slope, reach the standard grade and extend to the other end h2 of next needle falling hole h from an end h1 of the needle falling hole h of in-line, the mode alternately becoming the shape of zigzag with needle falling hole h and stitching Uk forms decorative pattern.

When keeping cloth and form stitching according to the tailoring pattern of regulation, because cloth moving direction changes along with tailoring pattern, so in order to which cloth moving direction all be formed with the needle tracking of fixing angular slope relative to, must be corresponding with the change of cloth moving direction, change in-line needle falling hole h towards.

Because above-mentioned existing Sewing machines has needle bar rotating mechanism, so this needle bar rotating mechanism can be utilized to make cutting knife pin rotate.

But, needle bar rotating mechanism due to above-mentioned existing Sewing machines utilizes cam mechanism to carry out the rotation of needle bar, so the rotation direction of needle bar is fixing and the scope of rotational angle also limits by cam, therefore, cannot corresponding with cloth moving direction and suitably regulate cutting knife pin towards, be difficult to avoid the needle bar rotating mechanism adding cast-over mark to be used in the rotation of cutting knife pin by being used for.

Summary of the invention

The object of the invention is, while more effectively preventing adding cast-over mark, carry out suitable the making utilizing cutting knife pin.

The present invention is a kind of Sewing machines, and it has: needle bar, and it keeps suture needle, moves up and down, still, it is made by rotational action to reach the standard grade and to be wound around with rolling off the production line, sewing machine electromotor, it is as the drive source moved up and down of described needle bar, needle bar rotating mechanism, it makes described needle bar around axis rotation along the vertical direction, hold together line mechanism, what its downside at needle plate utilized line parts to carry out rolling off the production line holds together line, travel mechanism, it makes sewn object move to arbitrary cloth moving direction along the horizontal plane, and carries out falling pin, control part, it is based on stitch data, to described travel mechanism, described needle bar driving mechanism and described in hold together line driving mechanism and control, this stitch data define for the formation of regulation the needle downing position of each pin of tailoring pattern or the amount of movement of the described sewn object of each pin, the feature of this Sewing machines is, described suture needle is the cutting knife pin described sewn object being formed to the needle falling hole of roughly elongated hole-shape, described needle bar can be carried out angular adjustment from reference position by described needle bar rotating mechanism in forward and reverse direction, described control part, corresponding with described cloth moving direction and perform and utilize the rotation of the described needle bar of described needle bar rotating mechanism to control, the stitching that the needle tracking formed one by one has arbitrary angle of inclination relative to the cloth moving direction of described sewn object and is associated, and, described control part, when described cloth moving direction be predetermined hold together line angular range, that holds together line mechanism described in execution utilizes holds together line traffic control.

In addition, in above-mentioned Sewing machines, also can be configured to, described control part, the cloth moving direction utilizing described travel mechanism to carry out the movement of described sewn object is divided into multiple angular range, the rotational angle of described needle bar is determined respectively for the plurality of angular range, and, which of described multiple angular range is belonged to for the described cloth moving direction of answering according to based on respectively falling of described stitch data, described needle bar rotating mechanism is controlled, to become the rotational angle determined for this angular range.

In addition, in above-mentioned Sewing machines, also can be configured to, described control part, when described cloth moving direction is predetermined line winding direction change angular range, performs and utilize the rotation of the described needle bar of needle bar rotating mechanism to control, to become predetermined rotational angle, in described multiple angular range, at least 1 angular range includes described line winding direction and changes angular range.

In addition, in above-mentioned Sewing machines, also can by correspond to described multiple angular range each and the rotational angle of described needle bar determined is defined as, the angle of inclination of the needle falling hole of the described elongated hole-shape that described cutting knife pin is formed all becomes in fixing angular range relative to any described cloth moving direction.

In addition, in above-mentioned Sewing machines, also can be configured to, have setup unit, this setup unit at random sets the rotational angle of the described needle bar of each corresponding to described multiple angular range.

The effect of invention

The present invention can perform line holding together line angular range, in addition, can change the rotation that angular range performs needle bar, therefore, it is possible to avoid adding cast-over mark by winding direction online.

And, owing to the rotational angle of needle bar can be carried out angular adjustment in forward and reverse direction from reference position by needle bar rotating mechanism, so the rotational angle of needle bar at random can be regulated in wide region, needle bar rotating mechanism can be utilized, corresponding with cloth moving direction and suitably regulate cutting knife pin towards.

Therefore, it is possible to realize the stitching of suitably formation cutting knife pin and avoid adding both cast-over marks.

In addition, be configured to, multiple angular range is divided into by utilizing the cloth moving direction of travel mechanism (moving direction of sewn object), when one of them angular range comprises line winding direction change angular range, more suitably can realize the stitching of the suitable cutting knife pin of formation and avoid adding both cast-over marks.

In addition, so-called " angular range comprises line winding direction and changes angular range " can be this angular range, and to change angular range with line winding direction consistent, also can be that this angular range comprises line winding direction change angular range.

In addition, be defined as at the rotational angle corresponding to the needle bar of each in multiple angular range, the needle falling hole of the directive shape of the tool that cutting knife pin is formed towards when becoming in fixing angular range relative to cloth moving direction, more suitably can form the stitching of cutting knife pin.

Accompanying drawing explanation

Fig. 1 is the oblique view of Sewing machines.

Fig. 2 is the side view of the state of the part representing the leading section cutting Sewing machines arm.

Fig. 3 (A) represents the top view of still, and Fig. 3 (B) represents the front view of still.

Fig. 4 is the oblique view of needle bar rotating mechanism.

Fig. 5 is the side view of the part cutting needle bar rotating mechanism.

Fig. 6 is the top view of the part cutting needle bar rotating mechanism.

Fig. 7 is the top view holding together line mechanism.

Fig. 8 is the oblique view holding together line mechanism.

Fig. 9 is the top view holding together line cam parts.

Figure 10 is the profile of line adjusting device.

Figure 11 (A) is the front view of cutting knife pin, and Figure 11 (B) is the side view of cutting knife pin.

Figure 12 is the top view of cutting knife pin.

Figure 13 is the block diagram of the control system representing Sewing machines.

The profile of the state that Figure 14 (A) passes pinprick coiling direction left of reaching the standard grade when representing that cloth is thrust in suture needle is wound around, Figure 14 (B) is the profile representing the state that coiling direction to the right of reaching the standard grade is wound around.

Figure 15 represents the moving direction of cloth and adds the key diagram of relation of producing cause of cast-over mark.

Figure 16 be the angular regions representing corresponding to cloth moving direction should perform line and needle bar rotate in which chart.

Figure 17 is the key diagram of the angular relationship representing needle falling hole and cloth moving direction.

Figure 18 is the key diagram of the relation of the needle bar rotational angle represented in the tailoring pattern of rectangle and each interval thereof.

Figure 19 is the key diagram representing the relation between 4 angular ranges and the needle bar rotational angle corresponding with each angular range here determined for cloth moving direction.

Figure 20 is the line chart of the relation of the height representing shaft angle degree and suture needle.

Figure 21 is the motion diagram of suture needle in Sewing machines, still, Libra.

Figure 22 be represent do not perform line state under the top view holding together the position relationship of line parts and pin hole.

Figure 23 is the top view holding together the position relationship of line parts and pin hole under the state representing that line is held together in execution.

Figure 24 is the key diagram of the pull-out situation that rolls off the production line represented when performing line.

Figure 25 adds the flow chart that cast-over mark avoids control and cutting knife pin angle correct control.

Figure 26 (A) is the key diagram representing desirable needle tracking, and Figure 26 (B) represents the key diagram adding cast-over mark.

Figure 27 is the key diagram representing the stitching using cutting knife pin.

The explanation of label

11 cutting knife pins

11a pinprick

12 needle bars

13 stills

14 needle plates

20 suture needle reciprocating mechanisms

21 sewing machine electromotors

Axle on 22

30 needle bar rotating mechanisms

31 needle bar turntables

32 needle bar rotating motors

40 container mechanisms

50 hold together line mechanism

51 hold together line parts

52 hold together line motor

80 cloth travel mechanisms (travel mechanism)

83 X-axis motor

84 Y-axis motor

90 control device (control part)

91 CPU

94 data storages

95 guidance panels (setup unit)

100 Sewing machiness

332 drive sprockets

333 Support brackets

335 driven sprockets

336 Timing Belts

511 guide portion

521 motor erecting beds

522 driving gears

523 driven gears

524 turning cylinders

531 cam part

532 motionless intervals

533 motionless intervals

Between 534 active regions

541 roller wrists

541a, 541b wrist

542 back shafts

543 helical springs

544 retainers

A, B cloth move angle scope (holding together line angular range)

C cloth move angle scope (line winding direction changes angular range)

H needle falling hole

Detailed description of the invention

[summary of embodiment]

Based on Fig. 1 ~ Figure 25, embodiments of the present invention are described.

The following Sewing machines 100 recorded as present embodiment is so-called electronic cycle sewing machines, there is the holding frame as cloth maintaining part, this holding frame keeps carrying out the sewn object made and cloth, by making this holding frame relatively move relative to the cutting knife pin as suture needle, thus on the cloth being held in holding frame, form the tailoring pattern of the stitch data based on regulation.

In addition, the feature of this Sewing machines 100 is, implements following two kinds of controls: add cast-over mark and avoid controlling, it is corresponding with the moving direction of the cloth utilizing holding frame movement, suitably optionally implements the rotation of holding together line or needle bar of rolling off the production line; And the angle correct of cutting knife pin controls, it forms needle falling hole with the angle of inclination corresponding with cloth moving direction.

Fig. 1 is the oblique view of Sewing machines 100 involved in the present invention, and Fig. 2 is the profile representing Sewing machines arm 101a inside described later.

Here, the direction that cutting knife pin 11 described later carries out moving up and down is defined as Z-direction or above-below direction, orthogonal with it direction is defined as X-direction or left and right directions, the direction orthogonal with both Z-direction and X-direction is defined as Y direction or fore-and-aft direction.In addition, " front " in below illustrating represents that the operating personnel carrying out making is relative to the direction residing for Sewing machines 100, " left side " represents the left-hand side be positioned under operating personnel on front side of Sewing machines 100 state relative with Sewing machines 100, and " right side " expression is positioned at the right-hand side under operating personnel on front side of Sewing machines 100 state relative with Sewing machines 100.

Above-mentioned Sewing machines 100 mainly has: needle bar 12, keeps cutting knife pin 11, move up and down along Z-direction in its bottom; Suture needle reciprocating mechanism 20, sewing machine electromotor 21 as drive source, makes cutting knife pin 11 move up and down by it; Needle bar rotating mechanism 30, it makes needle bar 12 rotate around the center line of the needle bar 12 along Z-direction; Container mechanism 40, it has makes to roll off the production line and the still 13 be wound around of reaching the standard grade through cutting knife pin 11; Hold together line mechanism 50, what it carried out rolling off the production line holds together line; Line adjusting device 70, it carries out the variable adjustment of the line tension of reaching the standard grade; As the cloth travel mechanism 80 of travel mechanism, it keeps cloth, at random carries out running fix along X-Y plane; As the control device 90 of action control unit, it carries out the action control of above-mentioned each structure; And sewing machine stand 101, it supports each structure of Sewing machines 100.

[sewing machine stand]

As shown in Figure 1, Sewing machines 100 has and observes the sewing machine stand 101 of profile in roughly U-shaped from X-direction.This sewing machine stand 101 has: Sewing machines arm 101a, and it forms the top of Sewing machines 100, extends along Y direction; Sewing machine base portion 101b, it forms the bottom of Sewing machines 100, extends along Y direction; And upstanding body portion 101c, it links being positioned at upper and lower Sewing machines arm 101a and sewing machine base portion 101b.

[suture needle reciprocating mechanism]

As shown in Figures 1 and 2, suture needle reciprocating mechanism 20 has: upper axle 22, and it, in above-mentioned Sewing machines arm 101a, is rotatably supported with the state along Y direction; Sewing machine electromotor 21, it applies revolving force from an end of upper axle 22; Needle bar crank 23, it is arranged at the other end of axle 22; Toggle-action lever 24, the eccentric position relative to pivot of one end and needle bar crank 23 links; Needle bar clasps portion 25, and it engages with the surrounding of needle bar 12, utilizes not shown screw to carry out clasping fixing; And transferring element 26, it is clasped portion 25 via needle bar and to transmit from toggle-action lever 24 to needle bar 12 and move up and down.

Upper axle 22 directly links with the output shaft of sewing machine electromotor 21, carries out rotary actuation, upper axle 22 be rotated through needle bar crank 23 and toggle-action lever 24 is transformed to upper and lower reciprocating action, transmit to needle bar 12.

Above-mentioned transferring element 26 has: top plate portion 261 and base plate 262, arranges needle bar between which and clasps portion 25; And opening portion 263, it is for clasping portion 25 when assembling to inserting needle bar between top plate portion 261 and base plate 262.

Top plate portion 261 and the central portion of base plate 262 all when top view are formed with the through hole that can insert needle bar 12, by inserting needle bar 12 in this each through hole, between top plate portion 261 and base plate 262, clasp portion 25 to needle bar clasps fixing, thus transferring element 26 and needle bar 12 can be made to link along the vertical direction, further, can rotate around Z axis centered by needle bar 12.

Further, transferring element 26 has the back shaft 264 along Y direction, and back shaft 264 supports via metal bearing by the bottom of toggle-action lever 24 rotationally.In addition, this back shaft 264 runs through toggle-action lever 24, links behind at it with square block 265.

This square block 265 is oblong-shaped, in the both sides of X-direction, is formed with guiding groove 101d at the inwall of Sewing machines arm 101a, and this guiding groove 101d is used for making square block 265 not rotate and move up and down.

Therefore, when the bottom of toggle-action lever 24 moves up and down, transferring element 26 can be prevented around the swing of back shaft 264 and rocking of X-direction, transmit to needle bar 12 and stable move up and down action.

[still]

Fig. 3 (A) is the top view of still, and Fig. 3 (B) is front view.

In the Sewing machines 100 involved by present embodiment, be illustrated the situation adopting semi-rotating kettle as still 13.Still 13 has: middle still 132, and its inner side at large still 131 and moving up and down of needle bar 12 synchronously carry out reciprocating rotation; Be contained in bobbin 133 and the bobbin casing 134 of the inner side of middle still 132; And driver (omitting diagram), it applies reciprocating rotation to middle still 132.In addition, at the lower shaft linked via speed increasing mechanism and above-mentioned upper axle 22, be connected with driver, middle still 132 carries out reciprocating rotation with the speed of two times of the speed that moves up and down of cutting knife pin 11.

That is, above-mentioned sewing machine electromotor 21 becomes the drive source with the rotational action of still 13 that moves up and down of needle bar 12, and by the rotation with still 13 that moves up and down of cutting knife pin 11, making to reach the standard grade is wound around with rolling off the production line.In addition, the structural texture due to semi-rotating kettle is known, so omit detailed description.

[needle bar rotating mechanism]

Based on Fig. 2 and Fig. 4 ~ Fig. 6, needle bar rotating mechanism 30 is described.

The side, bottom of needle bar 12 is supported with the state that can move up and down and rotate by lower needle bar bearing (metal bearing) 122, and the side, upper end of needle bar 12 can be supported up or down by the upper needle bar bearing (metal bearing) 121 being arranged at the bottom of the needle bar turntable 31 of needle bar rotating mechanism 30.

Further, the bottom of needle bar 12 keeps cutting knife pin 11, is provided with rectangular slab 123 in upper end, and this rectangular slab 123 becomes the parts stoped relative to the rotation of needle bar turntable 31.Rectangular slab 123 inserts to the groove 12a that runs through being formed at needle bar 12 top, utilizes not shown screw to fix.Therefore, rectangular slab 123 is relative to needle bar 12, and protrude to the both sides, diameter of a circle direction centered by this needle bar 12, these protuberances form a pair protuberance 123a, 123b.In addition, needle bar 12 and rectangular slab 123 are made up of different parts, but also easily expect replacing this structure, and on needle bar, form a pair protuberance.

Needle bar rotating mechanism 30 has: cylindric needle bar turntable 31, and it can support needle bar 12 up or down in inner side; Needle bar rotating motor 32, it becomes the drive source of the rotational action around Z axis centered by needle bar 12 of needle bar turntable 31; And transmission mechanism 33, it transmits rotational action from needle bar rotating motor 32 to needle bar turntable 31.

The upper end of needle bar turntable 31 and bottom utilize metal bearing 311,312 the mode that needle bar 12 rotates as center around Z axis can be supported.The metal bearing 311 of upside is fixedly mounted near the upper surface of Sewing machines arm 101a.

In addition, the metal bearing 312 of downside, via the support wrist 312a (Fig. 4) extended outside radial direction, is kept by the support component 313 be installed on the wall of Sewing machines arm 101a.

Needle bar turntable 31 is owing to supporting upper and lower 2 positions by them, so can maintain securely towards the state of vertical above-below direction, what can realize needle bar 12 moves up and down action smoothly.

In addition, because needle bar 12 is also supported, so can maintain securely towards the state of vertical above-below direction together with needle bar turntable 31 by upper and lower needle bar metal bearing 121,122.

In addition, for needle bar turntable 31, the opening portion along the elongated hole-shape of Z-direction forms the both sides face of Y direction in Figure 5, in this opening portion, utilizes screw to be fixed with rectangular guided plate 314,314 respectively at upper and lower 2 positions.Each guided plate 314,314 runs through along Z-direction and is formed with elongated hole 314a, in each elongated hole 314a, 314a from it inside be inserted with protuberance 123a, 123b of needle bar 12.The width of elongated hole 314a is formed as slightly wider than the width of protuberance 123a, 123b, thereby, it is possible to make protuberance 123a, 123b slide along elongated hole 314a.That is, by the co-operating of protuberance 123a, 123b of above-mentioned guided plate 314,314 and needle bar 12, needle bar 12 can not be hindered and move up and down action, can rotate around Z axis centered by oneself together with needle bar turntable 31.

Transmission mechanism 33 has: motor bracket 331, and it supports this needle bar rotating motor 32 to make the output shaft of needle bar rotating motor 32 state downward; Support bracket 333, the projecting ends that its upper surface from Sewing machines arm 101a utilizing bearing 334 to support needle bar turntable 31 rotationally protrudes; Drive sprocket 332, it is fixedly mounted on the output shaft of needle bar rotating motor 32; Driven sprocket 335, it is fixedly mounted near the projecting ends of needle bar turntable 31; And Timing Belt 336, it is hung on drive sprocket 332 and driven sprocket 335.

Thus, if needle bar rotating motor 32 drives, then can apply to rotate to needle bar turntable 31, make needle bar 12 rotate together with needle bar turntable 31.In addition, needle bar rotating motor 32 can, by the control of control device 90 to positive direction and driving in the other direction, can make cutting knife pin 11 and needle bar 12 to positive and negative rotation.

In addition, the center line of needle bar 12 and the rotary centerline of needle bar turntable 31 are all located along the same line.

Utilize said structure, this needle bar rotating mechanism 30 can make cutting knife pin 11 from be positioned at reference position described later (with reference to Figure 12 towards) state clockwise and counterclockwise, in the scope at least arriving 45 °, carry out positive and negative rotation to arbitrarily angled respectively.In addition, by using more at a high speed or the needle bar rotating motor 32 of higher moment of torsion, can cutting knife pin 11 be made to positive and negative rotation in more wide region.

[middle presser feet]

Label 13 in Fig. 2 is middle presser feets, in this presser feet identically with needle bar 12 using sewing machine electromotor 21 as drive source, utilize not shown known action transmission mechanism, synchronously move up and down with needle bar 12.

In this, the frame of the cylindrical shape that presser feet 13 makes cutting knife pin 11 insert loosely moves up and down with the amplitude less than needle bar 12 in the upside slightly of cloth, and when cutting knife pin 11 is moved upward, pressing cloth, is not pulled up to make this cloth.

[Libra mechanism]

Label 16 in Fig. 2 and Fig. 5 is Libra mechanisms.

This Libra mechanism 16 is made up of following part: linkage component 161, and axle support is carried out by eccentric shaft in one end, and the upper end of this eccentric shaft to the toggle-action lever 24 being arranged at needle bar crank 23 supports; And bell crank parts 163, it has Libra 162.

Bell crank parts 163 have the base portion supported at the inside axle of Sewing machines arm 101a and two wrists extended from this base portion, and a wrist becomes the Libra 162 of the outside extending to Sewing machines arm 101a.In addition, the other end of another wrist 163a and linkage component 161 links, and inputs rotational action to bell crank parts 163.

In the leading section of Libra 162, be formed with the through hole inserting the U that reaches the standard grade.

By said structure, Libra mechanism 16 makes Libra 162 move up and down with the cycle identical with needle bar 12.But Libra 162 is designed to, on upper shaft angle degree, postpone about about 60 ° and arrive top dead centre compared with needle bar 12.

[holding together line mechanism]

Fig. 7 is the top view holding together line mechanism 50, and Fig. 8 is oblique view.

Hold together the inside that line mechanism 50 is arranged on sewing machine base portion 101b, and be arranged on downside compared with needle plate 14, hold together line by what hold together that line parts 51 carry out rolling off the production line.This holds together line mechanism 50 has: hold together line parts 51, and it utilizes leading section to carry out hook and mobile to from bobbin casing to rolling off the production line of transmitting of the pin hole 15 of needle bar 14, thus changes this path of rolling off the production line; Hold together line motor 52, it becomes the drive source holding together line action that this holds together line parts 51; Hold together line cam parts 53, it passes through to hold together line motor 52 and carries out action; As the roller 54 of driven member, it carries out action applying from holding together line cam parts 53; And linkage 55, its from roller 54 to hold together line parts 51 transmit roll off the production line hold together line action.Linkage 55 has roller wrist 541 and back shaft 542.

Above-mentioned hold together line motor 52 by being arranged on the motor erecting bed 521 of the inside of sewing machine base portion 101b, with output shaft vertically top state supported, this output shaft is installed driving gear 522.At the upper surface of motor erecting bed 521, be adjacent to driving gear 522 driven gear 523 arranging minor diameter, the two is engaged with each other, thus transmits speedup rotation from driving gear 522 to driven gear 523.

Driven gear 523 via its turning cylinder 524 with hold together line cam parts 53 and link, the rotation of driven gear 523 is passed to line cam parts 53.

Fig. 9 is the top view holding together line cam parts 53.Hold together line cam parts 53 for roughly fan-shaped, roughly the outer edge of arc-shaped becomes and abuts with roller 54 and form the cam part 531 of displacement.Further, this cam part 531 has and maintains motionless interval 532,533 of the cam face of the arc-shaped of certain distance with center position, to be formed with between the active region be connected with the two 534 between two motionless interval 532,533.Two motionless interval 532,533 is all the cam face maintaining certain distance with center of rotation, but motionless interval 533 compared with motionless interval 532, and radius sets larger.

Between active region, 534 is cam face, its diameter from a motionless boundary position of interval 532 increase gradually, with another motionless boundary position of interval 533, reach interval 533 identical diameters motionless with this.

That is, hold together line cam parts 53 and have cam part 531, this cam part 531 is formed continuously not to hold together that line parts 51 hold together line action motionless interval 532,533, and between the active region holding together line parts 51 and hold together line action 534.

Although detailed content describes below, but hold together line mechanism 50, the timing in the scope of certain upper shaft angle degree is become in making, make line parts 51 to rotate to fixed-direction in the angular range of regulation, and, timing in the scope of upper shaft angle degree becoming other, makes line parts 51 with the angular range identical with last time to counter-rotation.Therefore, sewing speed is higher, holds together line parts 51 and also must carry out at a high speed to the rotational action of all directions.

Therefore, line cam parts 53 are held together in design in the following manner, namely, motionless interval 532 or 533 are arranged in the cam part 531 of holding together line cam parts 53, using this motionless interval 532 or 533 as the position of readiness of roller 54, using motionless interval 532 or 533 as during power-assist during roller 54 relative movement and after fully accelerating, roller 54 is along 534 relative movements between active region.Thus, only utilize the high-speed region of line motor 52, just can carry out the high speed rotating action of holding together line parts 51.

In addition, hold together line parts 51 and carry out reciprocating rotation, but temporarily stop between outlet is rotated and loop is rotated.

Therefore, one motionless interval 532 for hold together line parts 51 outlet rotate time power-assist during, another motionless interval 533 for hold together line parts 51 loop rotate time power-assist during.

Thereby, it is possible to make the rotation in the outlet of line parts 51 and the rotation high speed in loop respectively.

In addition, also can be configured to, holding together in line mechanism 50 origin sensor arranging and the benchmark position of readiness holding together line cam parts 53 is detected, by holding together the rotation of line cam parts 53 from this position of readiness, thus when holding together line motor 52 and just becoming fast state, hold together line parts 51 and carry out rotational action.

The roller 54 abutted with the cam part 531 of holding together line cam parts 53, rotatably remains on a wrist 541a as the roller wrist 541 of bell crank, maintains line parts 51 at another wrist 541b of roller wrist 541.

In addition, the base end part side for this roller wrist 541, two wrists 541a, 541b is supported rotationally by the back shaft 542 be arranged on motor erecting bed 521.

In addition, roller wrist 541, by torsion-coil spring pretension on the 543rd 8, abuts with the cam part 531 of holding together line cam parts 53 all the time to make roller 54.

In addition, roller wrist 541 arranges retainer 544 simultaneously, to hold together line cam parts 53 inordinate rotation, roller 54 comes off from cam part 531, can not due to torsion-coil spring 543 inordinate rotation.

The base end part holding together line parts 51 is held in the pivoting end of the wrist 541b of roller wrist 541, and this leading section holding together line parts 51 extends in the direction of the lower side direction pin hole 15 of needle plate 14.In addition, this side, leading section holding together line parts 51 becomes free end, and in addition, leading section is formed as sharp-pointed shape.Further, hold together line parts 51 and carry out following actions: usually its leading section relative to pin hole 15 forwards away from and keep out of the way, when holding together line, leading section through mobile immediately below pin hole 15, with transmit from bobbin casing 134 to pin hole 15 roll off the production line to engage and also rearward hold together line.

In addition, the left side of needle plate 14 is provided with guide portion 511, descend thereon accommodating plate-shapedly in the gap of two boards shape body to hold together line parts 51, make this hold together line parts 51 and insert in the gap in the front and back of rotational action, thus the vibrations of above-below direction when suppressing to hold together line parts 51 rotational action.

According to said structure, holding together in line mechanism 50, if be positioned at the state of the regulation position of readiness motionless interval 532 of the cam part 531 of line cam parts 53 from roller 54, make line motor 52 to start to drive, then hold together line cam parts 53 and start to rotate via driving gear 522, driven gear 523.

Then, utilize line motor 52, roller 54 is accelerated hold together line cam parts 53 motionless interval 532, between active region, 534 to carry out relative movement at a high speed.Thus, roller wrist 541 rotates, and makes line parts 51 to rotate.Then, utilizing this to hold together the outlet rotational action of line parts 51, holding together the action that line parts 51 carry out by the D that rolls off the production line rearward being held together immediately below pin hole 15 line.

Then, if roller 54 arrives the stop position of another regulation in motionless interval 533, then hold together line motor 52 and stop driving.

In addition, hold together line mechanism 50, be positioned at the motionless state of interval 533 from roller 54, make line motor 52 to drive in the mode reversely rotated, make roller 54 carry out relative movement while motionless interval 533 carry out accelerating, between active region, in 534, carry out the loop rotational action of holding together line parts 51.

Further, if roller 54 arrives the position to be avoided originally in motionless interval 532, then hold together line motor 52 and stop driving.

[cloth travel mechanism]

As shown in Figure 1, cloth travel mechanism 80 has: holding frame 81, and its upper surface at sewing machine base portion 101b keeps cloth; Support arm 82, it supports holding frame 81, makes holding frame 81 liftable; X-axis motor 83 shown in Figure 13, it makes holding frame 81 move along X-direction via support arm 82; And the Y-axis motor 84 shown in Figure 13, it makes holding frame 81 move along Y direction via support arm 82.

Cloth travel mechanism 80 by said structure, can via holding frame 81 by cloth running fix to the optional position of X-Y plane, can carry out falling pin at an arbitrary position for each pin, thus freely can form stitching.That is, be called as the cloth travel mechanism 80 of travel mechanism, make cloth move to optional position along the horizontal plane, carry out falling pin at an arbitrary position.

[line adjusting device]

Figure 10 is the profile of line adjusting device 70.Line adjusting device 70 mainly has: line adjuster 79, and it is to applying line tension of reaching the standard grade; And line regulates solenoid 71, it carries out variable adjustment as line tension adjustment actuator to the line tension applied by line adjuster 79.

Above-mentioned line adjuster 79 is arranged on the right flank of Sewing machines arm 101a, clamps reaching the standard grade from line supply source to the path of Libra 142, carries out the applying of line tension.This line adjuster 79 has: two line adjustment disks 72,72, and its clamping is reached the standard grade; Hollow support shaft 73, it supports above-mentioned line adjustment disk 72,72, enables them move along the X-direction contacting with each other/be separated; Pressing axis 74, it runs through the inside of hollow support shaft 73, a line adjustment disk 72 can be pressed to another line adjustment disk 72; Line taking spring 75; And body shell 76, its collecting keeps said structure.

On the other hand, line regulates the left of solenoid 71 on-line control device, and configuration produces the output shaft 71a of thrust to the direction of protruding corresponding to the current value of energising, this output shaft 71a and pressing axis 74 arrange on same straight line.

Further, output shaft 71a is combined with the transmitter shaft 78 be inserted in helical spring 77, and this transmitter shaft 78 inserts in helical spring 77, and output shaft 71a presses to the direction pushed back by this helical spring 77.

Therefore, due to on-line control solenoid 71 be not energized time, output shaft 71a is pushed back by helical spring 77, can not get pressing force pressing axis 74 pressed to the direction of line adjustment disk 72, so two line adjustment disks 72,72 are freely, does not carry out the applying of line tension.

In addition, if regulate solenoid 71 to be energized to line, then by corresponding to the thrust of this current value, output shaft 71a is protruded, opposing helical spring 77, transmitter shaft 78 presses a line adjustment disk 72 via pressing axis 74, thus can this pressing force be corresponded to, to the applying line tension of reaching the standard grade between insertion two line adjustment disks 72,72.

In addition, line regulates the turn on angle of solenoid 71, is controlled by control device 90, can apply arbitrary line tension by line adjusting device 70 to reaching the standard grade.

In addition, as control part control device 90 perform line handling the needle or comprise that this handles the needle multiple handle the needle time, solenoid 71 is regulated to control to the line as line tension adjustment actuator, to belong to the angular range of A or B at the cloth moving direction calculated, reduction is carried out to line tension and regulates.

[cutting knife pin]

Figure 11 (A) represents the front view being positioned at the cutting knife pin 11 of reference position, and Figure 11 (B) represents the side view being positioned at the cutting knife pin 11 of reference position, and Figure 12 represents the top view of the cutting knife pin 11 being positioned at reference position.

This cutting knife pin 11 is cutting knife pins of flat cutting knife type, and its leading section 112 is formed as flat and sharp-pointed.It is different that this cutting knife pin 11 and section are that circular makes the pin of pin, forms the needle falling hole of roughly elongated hole-shape, such as in-line, rhombus, meniscate needle falling hole.

Further, as shown in figure 12, under the state that cutting knife pin 11 is positioned at reference position, pinprick 11a becomes the state along Y direction, and flat leading section 112 becomes the state along X-direction.As noted above, cutting knife pin 11 orthogonal with pinprick 11a for leading section 112 is called horizontal cutting knife.In addition, the label C in figure represents the center line of cutting knife pin 11.

In addition, under the state that cutting knife pin 11 is positioned at reference position, an end of pinprick 11a is towards operating personnel side (front side), and the other end of pinprick 11a is cut to be dug as smooth.If using an end side of this pinprick 11a as face side 113, side 114 is dug as cutting in the side, the other end of pinprick 11a, then from the U that reaches the standard grade of supply source pull-out of reaching the standard grade, dig side 114 from the face side 113 of the pinprick 11a of cutting knife pin 11 insert to cutting, and arrive cloth.

Under the state that cutting knife pin 11 is positioned at reference position, dig side 114 relative to cutting knife pin 11 and be configured with still 13 cutting, dig side 114 to be undertaken reaching the standard grade by still 13 seizure of wire loop from cutting of cutting knife pin 11.That is, so-called reference position, refers to and cuts that to dig side 114 relative with still 13, by still 13 carry out reaching the standard grade the seizure of wire loop time towards.

And, when the pin carrying out cutting knife pin 11 rotates, be in towards the state of reference position at the top dead centre (upper shaft angle degree 0 °) of needle bar 12, needle bar 12 starts to decline, and before the leading section of cutting knife pin 11 arrives cloth, carries out the rotation of needle bar 12 till the rotational angle as target, reference position was got back to before the lower dead center (upper shaft angle degree 180 °) of needle bar 12, then, catch by still 13 U that reaches the standard grade, form toe-in.

[control system of Sewing machines: control device]

Figure 13 is the block diagram of the control system representing Sewing machines 100.Sewing machines 100 has the control device 90 as control part, and this control device 90 is for controlling the action of each part mentioned above, each parts.Further, control device 90 has: ROM 92, and it stores the program for the action control in making; RAM 93, it becomes the operating area of calculation process; Non-volatile data storage 94, it is as memory cell, stores stitch data; And CPU 91, it performs the program in ROM 92.

In addition, CPU 91 via sewing machine electromotor drive circuit 21a, X-axis motor drive circuit 83a, Y-axis motor drive circuit 84a, hold together line motor drive circuit 52a, needle bar rotating motor drive circuit 34a, line regulate solenoid-activated loop 71b, respectively with sewing machine electromotor 21, X-axis motor 83, Y-axis motor 84, hold together line motor 52, needle bar rotating motor 32 and line and regulate solenoid 71 to be connected, control the driving that each motor 21,83,84,52,32 and line regulate solenoid 71.

In addition, CPU 91 is connected with the guidance panel 95 as setup unit via interface 95a, and operating personnel can input various setting.

In addition, sewing machine electromotor 21 has not shown encoder, its detection angles is exported to CPU 91.In addition, above-mentioned each motor 83,84,52,34 is stepping motors, and above-mentioned not shown initial point retrieval unit is connected with CPU 91, and export according to it, CPU 91 can identify the origin position of each motor.

Be stored in the stitch data in data storage 94, store the X-axis motor 83 of each pin of the tailoring pattern for making regulation and the actuating quantity of Y-axis motor 84 successively, CPU 91 is when making, the actuating quantity of X-axis motor 83 and Y-axis motor 84 is read in for each pin, further, the action control driving X-axis motor 83 and Y-axis motor 84 corresponding to this each actuating quantity is carried out.That is, control device 90 controls cloth travel mechanism 80 based on stitch data, and this stitch data determines needle downing position or the cloth amount of movement of each pin of the tailoring pattern forming regulation.

In addition, stitch data also can be the data of the position coordinates (X-Y coordinate) of the needle downing position of each pin of the tailoring pattern recorded for making regulation.In this case, control device 90 carries out following actions control, that is, according to each position coordinate, for each pin after the pin that falls at every turn, calculate the actuating quantity of X-axis motor 83 and Y-axis motor 84, and drive X-axis motor 83 and Y-axis motor 84.

[adding the producing cause of cast-over mark]

Above-mentioned CPU 91 makes control along with performing based on above-mentioned stitch data, performs to add cast-over mark and avoid controlling.The producing cause adding cast-over mark has 2.

First, as the 1st reason, enumerate the direction that the U that reaches the standard grade is wound around to cutting knife pin 11.When made by cloth travel mechanism 80 cloth correspond to stitch data move to any direction for every pin, direction is formed corresponding to this cloth direction of feed, i.e. stitching, when cutting knife pin 11 thrusts in cloth through the direction that reach the standard grade U and the cutting knife pin 11 of the pinprick 11a of cutting knife pin 11 are wound around, existence becomes left winding (Figure 14 (A)) or becomes right winding (Figure 14 (B)) 2 kinds of modes.This becomes and determines to become desirable needle tracking and still become 1 reason adding cast-over mark.

In addition, as the 2nd reason, the needle downing position in the path relative to the D that rolls off the production line is enumerated.Shown in Fig. 3 described above, under the state of pin hole 15 that the angle part of D from the bobbin casing 134 of still 13 of rolling off the production line is passed to needle plate 14, needle downing position makes cutting knife pin 11 certain side in left side L and right side R fall pin relative to the path of the D that rolls off the production line.This becomes and determines to become desirable needle tracking and still become 1 reason adding cast-over mark.

Figure 15 shows corresponding with the combination of the 1st above-mentioned producing cause and the 2nd producing cause, centered by pin hole 15, the angular range of the cloth moving direction of cloth travel mechanism 80 is divided into this state of 4 of A ~ D.Whether Figure 16 shows each scope shown in Figure 15, produce and add cast-over mark, and in addition, its reason corresponds to which above-mentioned reason.

First, the angular range of the cloth moving direction of A, when carrying cloth to the direction of this angular range, owing to rolling off the production line with roughly consistent from bobbin casing towards the direction of pin hole 15, so uncertain relative to rolling off the production line through pin hole 15, the region that cutting knife pin 11 falls on right side or falls in left side, adding cast-over mark reason may produce.On the other hand, for this region, due to its cloth moving direction, reach the standard grade relative to the winding direction of cutting knife pin 11 be reliably in right side, do not become the producing cause adding cast-over mark.Therefore, the cloth moving direction of A is desirable needle tracking and adds all issuable region of cast-over mark.

Below, the angular range of the cloth moving direction of B, if to the direction conveying cloth of this angular range, then relative to the path of rolling off the production line be connected with pin hole 15 from still (bobbin casing), cutting knife pin 11 falls side reliably becomes left side, and, for this region, due to its cloth moving direction, reach the standard grade relative to the winding direction of cutting knife pin 11 become right side.In the case, produce and add cast-over mark reason, the cloth moving direction of B becomes the region adding cast-over mark.

Below, the scope of the cloth moving direction of C, if carry cloth, then relative to the path of rolling off the production line be connected with pin hole 15 from still (bobbin casing) to the direction of this angular range, cutting knife pin 11 falls side reliably becomes left side, does not become and adds cast-over mark producing cause.On the other hand, uncertain relative to the winding direction of cutting knife pin 11 owing to reaching the standard grade, add cast-over mark reason so may produce.Therefore, the cloth moving direction of C is desirable needle tracking and adds all issuable region of cast-over mark.

The scope of the cloth moving direction of remaining D, if to the direction conveying cloth of this angular range, then relative to the path of rolling off the production line be connected with pin hole 15 from still (bobbin casing), cutting knife pin 11 fall side reliably become right side, reach the standard grade relative to the winding direction of cutting knife pin 11 become left side.Cast-over mark reason is added, so the cloth moving direction of D is the region becoming desirable needle tracking owing to not producing.

[control device: add cast-over mark and avoid controlling]

As noted above; in Sewing machines 100; become desirable needle tracking and still add cast-over mark; that the position that fallen relative to the path of rolling off the production line be connected with pin hole 15 from still (bobbin casing) by cutting knife pin 11 and reaching the standard grade determines jointly relative to these two reasons of winding direction of cutting knife pin 11; in addition; for the uncertain region of each reason, the kind of stitching also shows uncertain tendency.

Therefore, when only using avoid adding cast-over mark produce as object, for these 4 angular ranges of above-mentioned A ~ D of cloth moving direction utilizing cloth travel mechanism 80, as shown in figure 16, when to angular range A and angular range B moving cloth, utilize line mechanism 50 to perform line, when to angular range C moving cloth, utilize needle bar rotating mechanism 30 to perform needle bar and rotate.In addition, the rotation direction of the needle bar 12 in this situation and rotational angle, as long as rotate roughly 45 ° counterclockwise from reference position.

Therefore, control device 90 store in data storage 94 represent angular range A and angular range B number range hold together line driving data, when based on stitch data utilize the moving direction of the cloth of cloth travel mechanism 80 to be in the number range of angular range A and B, control is, perform utilize hold together line mechanism 50 hold together line action.

That is, angular range A and B is equivalent to " predetermined hold together line angular range ", and angular range C is equivalent to " predetermined line winding direction changes angular range ".

[cutting knife pin angle correct control]

On the other hand, this Sewing machines 100 is owing to using cutting knife pin 11 as suture needle, so for the action control of needle bar rotating mechanism 30, while avoiding adding cast-over mark, also need to implement the angle correct of cutting knife pin to control, that is, this cutting knife pin angle correct controls the needle falling hole for forming inclination on the direction corresponding with cloth moving direction.

Cutting knife pin 11 due to the Sewing machines 100 of present embodiment is flat cutting knife types, so form the needle falling hole of in-line on cloth.Such as, in order to control needle bar rotating mechanism 30, with the state making the needle falling hole h maintaining in-line as illustrated in fig. 17 tilt clockwise relative to cloth moving direction F, the control of cutting knife pin 11 angle must be determined as illustrated in fig. 18.

In addition, here shown in needle falling hole h towards being an example, can change arbitrarily.When changing, preferably use the needle falling hole of the in-line formed relative to reference position towards other different cutting knife pins.

In this Figure 18, exemplify the rectangular slits pattern that two limits are parallel with Y direction with X-direction respectively.

In the cloth in the f1 direction (be set in front 0 ° 90 °) of the tailoring pattern of Figure 18 moves, cutting knife pin 11 using relative to said reference position clockwise (as positive direction) tilt 45 ° towards carrying out falling pin, in the cloth in the f2 direction (using front as 180 ° when 0 °) of tailoring pattern moves, cutting knife pin 11 using relative to said reference position counterclockwise (as in the other direction) tilt 45 ° towards carrying out falling pin, in the cloth in the f3 direction (be set in front 0 ° 270 °) of tailoring pattern moves, cutting knife pin 11 with tilt clockwise relative to said reference position 45 ° towards carrying out falling pin, in the cloth in the f4 direction (be set in front 0 ° 0 °) of tailoring pattern moves, cutting knife pin 11 with tilt counterclockwise relative to said reference position 45 ° towards carrying out falling pin.

As noted above, in order to all form the needle falling hole h to inclined relative to arbitrary cloth moving direction F, as long as make needle bar 12 rotate using the scope of ± 45 ° (by clockwise as positive direction, by counter clockwise directions as in the other direction).

Therefore, as shown in figure 19, by centered by above-mentioned f3 direction ± the cloth moving direction scope of 45 °, as the 1st angular range (45 ° ~ 135 °), by centered by above-mentioned f4 direction ± the cloth moving direction scope of 45 °, as the 2nd angular range (135 ° ~ 225 °), by centered by above-mentioned f1 direction ± the cloth moving direction scope of 45 °, as the 3rd angular range (225 ° ~ 315 °), by centered by above-mentioned f2 direction ± the cloth moving direction scope of 45 °, as the 4th angular range (315 ° ~ 45 °).

And, control device 90, when cloth moving direction is contained in the 1st angular range, making needle bar 12 rotate 45 ° clockwise, when being contained in the 2nd angular range, making needle bar 12 rotate 45 ° counterclockwise, when being contained in the 3rd angular range, making needle bar 12 rotate 45 ° clockwise, when being contained in the 4th angular range, making needle bar 12 rotate 45 ° counterclockwise.

Thus, even if when making cloth moving direction change according to tailoring pattern, also can with the state tilted clockwise all the time relative to cloth moving direction, form needle falling hole h, can needle falling hole is maintained corresponding with the change of cloth moving direction towards while, form stitching.

In addition, the value of the rotational angle of the needle bar 12 in the 1st ~ 4th angular range, can utilize the guidance panel 95 as setup unit to set arbitrarily.

In addition, comprise the 2nd angular range in f4 direction, include and should be rotated by above-mentioned needle bar and avoid adding the whole region of the angular range C (with reference to Figure 15) of cast-over mark.But, if relative to the rotation direction of the needle bar 12 of reference position and rotational angle consistent with the rotation direction and rotational angle for avoiding the needle bar 12 adding cast-over mark, then can be formed and form the needle falling hole in direction corresponding to direction towards with stitching, can avoid adding cast-over mark simultaneously.

As noted above, when to angular range C moving cloth, in order to avoid adding cast-over mark, as long as utilize needle bar rotating mechanism 30 to make needle bar 12 carry out the rotation of 45 ° counterclockwise.In the 2nd angular range, due to the needle falling hole h making cutting knife pin 11 rotate 45 ° and formation inclination counterclockwise, so consistent with rotation direction and rotational angle for avoiding the needle bar 12 adding cast-over mark.Therefore, in the 2nd angular range, can realize being formed towards forming the needle falling hole in direction corresponding to direction with stitching and avoiding adding both cast-over marks.

Further, control device 90, when execution is made, performs following action control.Namely, if in order to carry out the making of tailoring pattern that specify and read in one for the actuating quantity of the X-axis motor 83 of answering and Y-axis motor 84 from stitch data, then according to the amount of movement of X-direction and Y direction, whether angular range A is belonged to the moving direction of cloth and angular range B judges.In addition, meanwhile, to the moving direction of cloth belong in the 1st ~ 4th angular range which judge.

Further, when the moving direction of cloth belongs to angular range A or angular range B, the line motor 52 that holds together holding together line mechanism 50 is controlled, perform line action, avoid adding cast-over mark.

In addition, when the moving direction of cloth belongs to the 1st or the 3rd angular range, utilize the needle bar rotating motor 32 of needle bar rotating mechanism 30 to carry out the needle bar rotational action of 45 ° clockwise, form the needle falling hole h tilted clockwise relative to cloth moving direction.In addition, when belonging to the 2nd or the 4th angular range, carrying out the needle bar rotational action of 45 ° counterclockwise, forming the needle falling hole h tilted clockwise relative to cloth moving direction.In addition, comprise in the 2nd angular range add cast-over mark avoid controlling in angular range C, but in order to form the needle falling hole h of inclination, needle bar 12 being applied counterclockwise to the rotational action of 45 °, therefore, avoiding adding cast-over mark.

[control device: that rotates about needle bar performs timing]

Below, suitable timing when rotating the needle bar performed in cutting knife pin angle correct control is described.Figure 20 be represent shaft angle degree and cutting knife pin 11 height between the line chart of relation.

Represent in fig. 20

A is interval: needle point is extracted until arriving the first transition till needle bar top dead centre from sewing object,

B is interval: arrive last transition till sewing object from needle bar top dead centre until needle point,

C is interval: arrive sewing object until arriving the last transition till needle bar lower dead center from needle point,

D is interval: from needle bar lower dead center until suture needle and still sharp consistent till first transition,

E is interval: from suture needle and the consistent first transition till suture needle is extracted from sewing object of still point.

In order to form the needle falling hole h of inclination, for the rotation of needle bar, require reach in Figure 20 be needled into angle before, make cutting knife pin 11 towards rotating necessary angle.Therefore, the needle bar rotating motor 32 of needle bar rotating mechanism 30 is controlled, with reach be needled into angle timing compared with, following required time starts to drive at least in advance, and this required time is the required time for making needle bar 12 rotate 45 °.

In addition, upper shaft angle degree is monitored by the output being arranged on the encoder on sewing machine electromotor 21.

In addition, cutting knife pin 11 towards, need at least before reaching the consistent upper shaft angle degree of pin still, before preferably reaching the upper shaft angle degree of needle bar lower dead center, get back to original in (reference position).Therefore, the needle bar rotating motor 32 of needle bar rotating mechanism 30 is controlled, with with reach needle bar lower dead center upper shaft angle degree timing compared with, following required time starts to drive at least in advance, and this required time is the required time for making needle bar 12 rotate 45 °.

[control device: perform timing about what hold together line]

Below, to perform add cast-over mark avoid controlling in hold together line when suitable timing be described.Figure 21 is the motion diagram of cutting knife pin 11 in Sewing machines 100, still 13, Libra 162.In Figure 21 ▲ mark line represent needle bar curve, ■ mark line represent still curve, ◆ the line of mark represents Libra curve.In addition, Figure 22, Figure 23 are the top views of the position relationship representing to hold together line parts 51 and pin hole 15, and Figure 22 illustrates the state not performing line, and Figure 23 illustrates the state performing line.

As shown in FIG. 22 and 23, the pin hole 15 becoming needle downing position is crossed, so in the execution of holding together line, for the rotation in outlet of holding together line parts 51 owing to holding together line parts 51, preferably be needled into before namely angle go up shaft angle degree 113 °, the rotation of holding together the outlet of line parts 51 completes.Therefore, the line motor 52 that holds together holding together line mechanism 50 is controlled, with with reach be needled into angle timing compared with, following required time starts to drive at least in advance, this required time be from hold together line cam parts 53 motionless interval 532 position of readiness arrive required time till the motionless stop position of interval 533.

In addition, for the rotation in loop of holding together line parts 51, preferably reach the standard grade utilize still and become distance suture needle center reaching the standard grade farthest decontrol angle namely go up shaft angle degree 270 ° time, carry out the rotation in the loop holding together line parts 51.Therefore, the line motor 52 that holds together holding together line mechanism 50 is controlled, starts to drive, with the timing making to move between active region 534 from hold together line cam parts 53 motionless interval 533 with reach the standard grade that to decontrol angle (shaft angle degree 270 °) consistent.

The rotational action of holding together line parts 51 requires that action is all carried out with shorter timing in outlet and loop, but after motionless interval 532 or 533 power-assists, arrive between active region 534 with fast state due to holding together line motor 52, so can make line parts 51 high speed rotating, can fully tackle the requirement carrying out action with shorter timing.

As shown in figure 24, if perform line, then roll off the production line and held together line parts 51 and hold together line, and path increases, and is drawn out from bobbin side.

Therefore, even if upper line tension arranges less compared with time usual, also can by the knotting of rolling off the production line to pull-up on the upside of cloth, can be formed with the good stitching strained compared with low-tension.

Therefore, be judged to when making to perform line fall pin time, perform the control that line regulates solenoid 71, to reduce line tension.

At this moment, line regulates the line tension of solenoid 71, can by carrying out computing to the setting value of the line tension set in stitch data and automatically reducing ormal weight, or reduce with the ratio of regulation and automatically obtain, or, the thread tension value being suitable for holding together line and performing can be set in advance, carry out similarly to become the mode being suitable for holding together the thread tension value that line performs when holding together line and performing the control that line regulates solenoid 71.

As noted above, by carrying out the control reducing line tension when holding together line, thus the homogenising of stitching and the line elasticity of the stitching do not performed performing line can be realized.

[adding the action specification that cast-over mark is avoided controlling and the angle correct of cutting knife pin controls]

Figure 25 adds the flow chart that cast-over mark avoids control.As shown in the figure, the control device 90 of Sewing machines 100 based on stitch data make execution time, when to be regulation read in angle to the anglec of rotation (phase place) rotated each time of upper axle, perform reading in (step S1) of the amount of movement of next X-direction of handling the needle and Y direction according to stitch data.

Then, according to the amount of movement of X-direction and Y direction, cloth moving direction is calculated (step S3).

Then, control device 90 is with reference to the number range of the angular range A stored in above-mentioned data storage 94 and angular range B, and the angular range whether the cloth moving direction calculated being belonged to A or B judges (step S5).

Its result, when cloth moving direction belongs to angular range A or B, regulates solenoid 71 to control to line, and controls to be line tension is reduced compared with setting value or becomes the value (step S7) of low-tension of regulation.

And, whether belong to the 1st angular range to cloth moving direction to judge (step S9), when belonging to, upper shaft angle degree is monitored, make the driving of line motor 52 to start in suitable timing, perform line, and, in suitable timing, the driving of needle bar rotating motor 32 is started, needle bar 12 is rotated 45 ° (step S11) clockwise.

In addition, when cloth moving direction does not belong to the 1st angular range, upper shaft angle degree is monitored, make the driving of line motor 52 to start in suitable timing, perform line, further, in suitable timing, the driving of needle bar rotating motor 32 is started, needle bar 12 is rotated 45 ° (step S13) counterclockwise.

Then, terminate to add the action that cast-over mark avoids control and cutting knife pin angle correct control.

On the other hand, in step s 5, when the cloth moving direction calculated does not belong to any one in the angular range of A or B, whether the 1st or the 3rd angular range is belonged to cloth moving direction and judges (step S15).Then, when belonging to, upper shaft angle degree being monitored, in suitable timing, the driving of needle bar rotating motor 32 being started, needle bar 12 is rotated 45 ° (step S17) clockwise.

In addition, when cloth moving direction does not belong to the 1st or the 3rd angular range, upper shaft angle degree is monitored, in suitable timing, the driving of needle bar rotating motor 32 is started, needle bar 12 is rotated 45 ° (step S19) counterclockwise.

Then, terminate to add the action that cast-over mark avoids control and cutting knife pin angle correct control.

[effect of embodiment]

As noted above, in Sewing machines 100, perform line holding together line angular range, online winding direction changes angular range and performs needle bar and rotate, therefore, it is possible to avoid adding cast-over mark.

And, owing to the rotational angle of needle bar 12 can be carried out angular adjustment from reference position to positive and negative both direction by needle bar rotating mechanism 30, so the rotational angle of needle bar 12 at random can be regulated in wide region, needle bar rotating mechanism can be applied to the angle correct of cutting knife pin control, this cutting knife pin angle correct control be used for corresponding with cloth moving direction and suitably regulate cutting knife pin 11 towards.

Especially, in Sewing machines 100, the 1st ~ 4th angular range is divided into by utilizing the cloth moving direction of cloth travel mechanism 80,2nd angular range comprises the angular range C changing angular range as line winding direction, therefore, it is possible to realize the stitching of suitably formation cutting knife pin 11 and avoid adding both cast-over marks.

In addition, due to the rotational angle of needle bar determined for the 1st ~ 4th angular range, be defined as, becoming in fixing angular range towards relative to cloth moving direction of the needle falling hole that cutting knife pin 11 is formed, thus can make the stitching of cutting knife pin 11 towards more suitable.

[other]

In the above-described embodiment, exemplify cloth as sewn object, but be not limited to this, all flaky materials also leather-like etc. can be able to handled the needle are as sewn object.

In addition, in above-mentioned Sewing machines 100, cloth moving direction is divided into the 1st ~ 4th angular range, at this angular range, the rotational angle of cutting knife pin 11 is defined as fixed value.Therefore, such as in the scope of 45 ~ 90 °, similarly cutting knife pin 11 become identical towards, needle falling hole become fixing angular range towards relative to cloth moving direction, but in order to make this angular range narrow further, also can compared with the 1st ~ 4th angular range thinner Ground Split angular range.Thus, when cloth moving direction is any direction, can both make relative to cloth moving direction needle falling hole towards evenly, can suitably make.

In addition, in above-mentioned Sewing machines 100, exemplify semi-rotating kettle as still, but the kind of still is not limited to this.Also can use the arbitrarily still such as full rotation still, horizontal container, but change due to the value of angular range A ~ D, so preferred pin carries out test etc. to the kind of each still and obtains angular range, and set suitable numerical value.

In addition, in needle bar rotating mechanism 30, use belt mechanism to apply rotational action from needle bar rotating motor 32 to needle bar 12, but be not limited to this.Rotational action is transmitted to needle bar 12 for from needle bar rotating motor 32, also can adopt and can freely and well carry out rotating forward the action applying mechanism with both counter-rotatings, such as gear mechanism, or, adopt the structure directly linked with the output shaft of needle bar rotating motor 32 by needle bar turntable 31.

In addition, exemplify cutting knife pin as suture needle, as long as but fixing shape and form the suture needle of the needle falling hole of the directive shape of tool relative to cloth moving direction, even common suture needle is also applicable to above-mentioned Sewing machines.In addition, roughly long hole shape is not limited to in-line shape, also can be the polygon except positive round, oval and other shapes.In addition, even if if the shape that longer rotation 180 ° is still identical on fixed-direction, then more preferably.

Claims (6)

1. a Sewing machines, it has:

Needle bar, it keeps suture needle, moves up and down;

Still, it is made by rotational action to reach the standard grade and to be wound around with rolling off the production line;

Sewing machine electromotor, it is as the drive source moved up and down of described needle bar;

Needle bar rotating mechanism, it makes described needle bar around axis rotation along the vertical direction;

Hold together line mechanism, what its downside at needle plate utilized line parts to carry out rolling off the production line holds together line;

Travel mechanism, it makes sewn object move to arbitrary cloth moving direction along the horizontal plane, and carries out falling pin;

Control part, it is based on stitch data, to described travel mechanism, described needle bar driving mechanism and described in hold together line driving mechanism and control, this stitch data defines the needle downing position of each pin of tailoring pattern for the formation of regulation or the amount of movement of the described sewn object of each pin

The feature of this Sewing machines is,

Described suture needle is the cutting knife pin described sewn object being formed to the needle falling hole of roughly elongated hole-shape,

Described needle bar can be carried out angular adjustment from reference position by described needle bar rotating mechanism in forward and reverse direction,

Described control part, corresponding with described cloth moving direction and perform and utilize the rotation of the described needle bar of described needle bar rotating mechanism to control, the stitching that the needle tracking formed one by one has arbitrary angle of inclination relative to the cloth moving direction of described sewn object and is associated

Further, described control part, when described cloth moving direction be predetermined hold together line angular range, perform hold together line mechanism described in utilizing hold together line traffic control.

2. Sewing machines according to claim 1, is characterized in that,

Described control part, is divided into multiple angular range by the cloth moving direction utilizing described travel mechanism to carry out the movement of described sewn object, determines the rotational angle of described needle bar for the plurality of angular range respectively, and,

Belong to which of described multiple angular range according to based on respectively falling of described stitch data for the described cloth moving direction of answering, described needle bar rotating mechanism is controlled, to become the rotational angle determined for this angular range.

3. Sewing machines according to claim 2, is characterized in that,

Described control part, when described cloth moving direction is predetermined line winding direction change angular range, performs and utilizes the rotation of the described needle bar of needle bar rotating mechanism to control, to become predetermined rotational angle,

In described multiple angular range, at least 1 angular range includes described line winding direction and changes angular range.

4. the Sewing machines according to Claims 2 or 3, is characterized in that,

Each and the rotational angle of the described needle bar determined corresponding to described multiple angular range are defined as, and the angle of inclination of the needle falling hole of the described elongated hole-shape that described cutting knife pin is formed all becomes in fixing angular range relative to any described cloth moving direction.

5. the Sewing machines according to Claims 2 or 3, is characterized in that,

Have setup unit, this setup unit at random sets the rotational angle of the described needle bar of each corresponding to described multiple angular range.

6. Sewing machines according to claim 4, is characterized in that,

Have setup unit, this setup unit at random sets the rotational angle of the described needle bar of each corresponding to described multiple angular range.