CN107268190A

CN107268190A - Sewing machine

Info

Publication number: CN107268190A
Application number: CN201710216825.0A
Authority: CN
Inventors: 岩田寿之; 小川达矢; 射越悠
Original assignee: Juki Corp
Current assignee: Juki Corp
Priority date: 2016-04-05
Filing date: 2017-04-05
Publication date: 2017-10-20
Also published as: DE102017107281A1; KR20170114979A; JP2017184980A

Abstract

The present invention can be thickening to detecting sewn object stage portion after the parameter such as bottom and top feed amount, foot pressure, line tension change.Sewing machine has：Cloth pressing (71), it is pressurized from above by sewn object；Presser feet height detection portion (76), its height to the cloth pressing (71) is detected；And control device (90), if presser feet height detection portion (76) detects that cloth pressing (71) jumps onto the situation of the thickening stage portion of sewn object, the control device (90) is controlled with by the parameter modification related to sewing.For example, if presser feet height detection portion (76) detects that cloth pressing (71) jumps onto the situation of stage portion, then control device (90) is controlled to the bottom and top feed motor (66) for applying the reciprocating action of the above-below direction of feeding tooth (31), and the height of the feeding tooth (31) fed in interval is raised.

Description

Sewing machine

Technical field

The present invention relates to a kind of sewing machine for carrying out feeding adjusting.

Background technology

The sewing machine of cloth feeding is carried out using presser feet and feeding toothholder entering cloth, currently employed following feedings Mechanism, the feed mechanism uses the feeding tooth for being connected and being acted with spindle machine (with reference to patent document 1).

In addition, sewing machine has presser feet lifting mechanism, the presser feet lifting mechanism is made up of following part：Foot-pressing bar, its is right Cloth pressing is kept；Presser feet spring, it applies foot pressure downwards via foot-pressing bar to cloth pressing；Bar, it is supported Resistance to compression pin spring and to foot-pressing bar apply vertical motion；And solenoid, it applies vertical motion via multiple gonnecting rod bodies to bar.

Also, when declining cloth pressing, solenoid is not driven or thrust is set to Min. and presser feet is utilized The spring pressure of spring carries out cloth pressing, when rising cloth pressing, drive solenoid and carry out lifting ac (for example, With reference to patent document 2).

Patent document 1：Japanese Unexamined Patent Publication 2013-146326 publications

Patent document 2：Japanese Unexamined Patent Publication 2011-092523 publications

But, the existing sewing machine of cloth feeding is carried out using presser feet and feeding toothholder entering cloth, in the presence of State problem, i.e. in the stage portion presser feet rise that cloth is thickening, foot pressure declines.

Now, if further increasing feeding tooth height, the gap between presser feet diminishes, therefore, it is possible to make up pressure The reduction amount of foot press power, but the feeding tooth for being connected and being acted with spindle machine in use as described in Patent Document 1 Feed mechanism in, it is difficult to main shaft rotation in feeding tooth height change.

In addition, in presser feet lifting mechanism as described in Patent Document 2, due to the vertical motion driving as cloth pressing Source and used solenoid, so being difficult to the foot pressure that cloth pressing is arbitrarily adjusted by control.

In addition, if presser feet jumps onto stage portion, then the problem of also there is LSOR.

The content of the invention

The problem of the present invention be can change bottom and top feed amount after the thickening stage portion of sewn object is detected, The parameters such as foot pressure, line tension.

In order to solve the problem of the above, the invention described in (1) is,

A kind of sewing machine, it is characterised in that have：

Suture needle reciprocating mechanism, it moves up and down needle bar；

Sewing machine electromotor, it turns into the driving source of the suture needle reciprocating mechanism；

Feeding station, it is supported to the feeding tooth for conveying the sewn object on needle plate；

Horizontal feed mechanism, it obtains power from the sewing machine electromotor, and horizontal direction is transmitted to the feeding station Reciprocating action；

Bottom and top feed mechanism, it applies the reciprocating action of above-below direction to the feeding station；

Cloth pressing, it is pressurized from above by the sewn object；And

Presser feet height detection portion, its height to the cloth pressing detects,

The horizontal feed mechanism has feeding adjusting motor, and the feeding adjusting motor is to electromechanical by the sewing The spacing of the reciprocating action for the horizontal direction for the feeding station that motivation is realized carries out change regulation,

The bottom and top feed mechanism has the driving source for the reciprocating action for turning into the above-below direction applied to the feeding station Bottom and top feed motor,

The sewing machine has control device, and the control device is controlled to the bottom and top feed motor, to cause such as Fruit detects that the cloth pressing jumps onto the thickening stage portion of the sewn object by the presser feet height detection portion, then will feeding The height of the feeding tooth in interval is raised.

(2) invention described in is the sewing machine described in (1), it is characterised in that had：

Foot-pressing bar, the cloth pressing is kept in its bottom；

Presser feet spring, it applies the presser feet pressure for the sewn object via the foot-pressing bar to the cloth pressing Power；And

Presser foot motor, it applies the lifting action of the cloth pressing, and the stroke of the presser feet spring is entered Row regulation, the foot pressure for the sewn object applied by the cloth pressing is adjusted,

The control device carries out following controls, i.e. if detecting the cloth presser by the presser feet height detection portion Pin jumps onto the stage portion, then the presser foot motor is controlled, and strengthens the cloth pressing and is directed to the sewn object The foot pressure.

(3) invention described in is the sewing machine described in (1) or (2), it is characterised in that

The presser feet height detection portion is by the detected body and optics that are vertically moved together with the cloth pressing Detect that the linear transducer of the height of the detected body is constituted in ground.

Or the invention described in (5) is the sewing machine described in (1) to (3) (4), it is characterised in that

With by being controlled to the current value flowed to solenoid, make the tension force of the line of the sewing sewn object can The line adjuster of change,

The control device carries out following controls, i.e. if detecting the cloth presser by the presser feet height detection portion Pin jumps onto the stage portion, then to being controlled to the solenoidal current value, and enhancing is realized by the line adjuster The tension force of the line.

The effect of invention

In accordance with the invention it is possible to after the thickening stage portion of sewn object is detected, change bottom and top feed amount, presser feet pressure The parameters such as power, line tension.

Therefore, even if cloth pressing jumps onto stage portion, also sewn object can be kept between cloth pressing and feeding tooth And sewed well.

Brief description of the drawings

Fig. 1 is the oblique view of the primary structure in the sewing machine base portion for represent sewing machine.

Fig. 2 is the oblique view of feeding adjusting mechanism.

Fig. 3 is the oblique view of bottom and top feed mechanism.

The action specification figure of bottom and top feed mechanism when Fig. 4 is 0 ° of the shaft angle degree of bottom and top feed motor.

The action specification figure of bottom and top feed mechanism when Fig. 5 is -5 ° of the shaft angle degree of bottom and top feed motor.

The action specification figure of bottom and top feed mechanism when Fig. 6 is+5 ° of the shaft angle degree of bottom and top feed motor.

Fig. 7 is the side view of cloth pressing mechanism.

Fig. 8 is the front view of cloth pressing mechanism.

Fig. 9 is the oblique view of cloth pressing mechanism.

Figure 10 is the action specification figure of the state for the retreating position that the cloth pressing of cloth pressing mechanism is set to top.

Figure 11 be make cloth pressing mechanism cloth pressing drop to needle plate state action specification figure.

Figure 12 is the action specification figure that the cloth pressing of cloth pressing mechanism is applied with the state of foot pressure on needle plate.

Figure 13 is the block diagram for the control system for representing sewing machine.

Figure 14 is the line chart of the track of the feeding tooth in the case of representing to be fed.

Figure 15 is represented by clockwise rotation and the anticlockwise track pattern for rotating obtained Figure 14 The line chart of the relation of the shaft angle degree of the bottom and top feed motor of data and upper shaft angle degree.

Figure 16 is the flow chart for the presser feet spring identifying processing that control device is carried out.

The explanation of label

11 needle plates

14 thread cutters

16 sewing machine electromotors

30 feed arrangements

31 feeding teeth

32 feeding station

40 horizontal feed mechanisms

50 feeding adjusting mechanisms

55 feeding adjusting bodies

57 feeding adjusting motor

60B bottom and top feeds mechanism

61B first connecting rods

61C grooved cams

62B, 62C second connecting rod

63A, 63B third connecting rod

64 fourth links

65 the 5th connecting rods

66 bottom and top feed motor

67 rotary shafts

71 cloth pressings

72 foot-pressing bars

73 presser foot motors

75 presser feet springs

76 presser feet height detection portions

90 control devices

94 EEPROM

95 pedals

96 operation inputting parts

100 sewing machines

101 line adjusters

161 encoders

Embodiment

[schematic configuration of embodiment]

Below, the sewing machine as embodiments of the present invention is described in detail.

Fig. 1 is the oblique view of the primary structure in the sewing machine base portion for represent sewing machine 100.

As shown in figure 1, sewing machine 100 has：Suture needle reciprocating mechanism (not shown), it makes suture needle move down It is dynamic；Sewing machine electromotor 16 (reference picture 13), it turns into the driving source of suture needle reciprocating mechanism；Upper axle (not shown), it leads to Cross sewing machine electromotor 16 and carry out spinning movement；Kettle 12, it makes to reach the standard grade and offline winding；Feed arrangement 30, itself and suture needle Move up and down accordingly to being conveyed as the cloth of sewn object on needle plate 11；Belt mechanism 20, it is from upper axle Revolving force is transmitted to the lower axle 33 of feed arrangement 30；Thread cutter 14 (reference picture 13), it will reach the standard grade and offline cut-out；Cloth Presser foot device 70, it carries out the lifting action of cloth pressing 71；Sewing machine stand 110 (reference picture 7), it is carried out to above-mentioned each structure Support；And control device 90 (reference picture 13), it is controlled to above-mentioned each structure.

In addition, above-mentioned sewing machine 100 is so-called sewing machine for covering chain stitch, possesses the Libra that common sewing machine for covering chain stitch has Each structures such as mechanism, line adjuster, cloth pressing, because these are well-known structures, so omitting the description.

Above-mentioned sewing machine stand 110 (reference picture 7) has：Sewing machine base portion 101, it is under being integrally located at of sewing machine Portion；Longitudinal body portion 102, it is uprightly set upward in the one end of the length direction in sewing machine base portion 101；And sewing Horn portion 103, it is extended from the upper end in longitudinal body portion 102 to the identical direction of sewing machine base portion 101.

The leading section (end of facing side) in sewing machine base portion 101 turns into needle downing position, and pin is equipped with its upper surface Plate 11.

In addition, in the following description, regarding the horizontal direction parallel with the length direction in sewing machine base portion 101 as Y Direction of principal axis, using level and the direction orthogonal with Y direction as X-direction, regard the direction orthogonal with X-axis and Y direction as Z Direction of principal axis.

[suture needle reciprocating mechanism and belt mechanism]

Suture needle reciprocating mechanism has：Upper axle, it is configured at the inner side of sewing machine arm 103, is sewed electric motor 16 rotation drivings, and configured along Y direction；Needle bar, it keeps suture needle in bottom；And crank mechanism (not shown), its The revolving force of upper axle is transformed to the reciprocating driving force that moves up and down and transmitted to needle bar.

Also, belt mechanism 20 has：Driving pulley, its fixed equipment is in upper axle；Driven pulley 21, its fixed equipment In the lower axle 33 of feed arrangement 30；And timing belt 22, it is set up in driving pulley and driven pulley 21.Also, pass through transmission Band mechanism 20, lower axle 33 with upper axle same speed to be rotated.

In addition it is also possible to replace belt mechanism and utilize the gear transmission mechanism that is made up of the longitudinal axis and bevel gear from upper axle Revolving force is transmitted to lower axle 33.

[feed arrangement]

As shown in figure 1, feed arrangement 30 has：Tooth 31 is fed, it is passed in and out from the opening of needle plate 11, by cloth to regulation side To conveying；Feeding station 32, it keeps to feeding tooth 31；Horizontal feed mechanism 40, it is moved from sewing machine electromotor 16 Power, the reciprocating action of X-direction (horizontal direction) is transmitted to feeding station 32；And bottom and top feed mechanism 60B, it is to feeding station 32 Apply the reciprocating action of above-below direction.

[horizontal feed mechanism]

Horizontal feed mechanism 40 has：Feeding adjusting mechanism 50, it is to the past double action for the X-direction transmitted to feeding station 32 The stroke of work is adjusted；Toggle-action lever 41, it obtains the reciprocating action along X-direction from lower axle 33；Horizontal feed axle 42, its from Toggle-action lever 41 is applied in reciprocating rotation via feeding adjusting mechanism 50；And horizontal feed arm 43, it is by horizontal feed axle 42 Reciprocating rotation driving force be transformed to the reciprocating driving force of direction of feed and transmitted to feeding station 32.

Eccentric cam (omit illustrate) of the one end of toggle-action lever 41 by fixed equipment in lower axle 33 is rotatably kept, separately One end links with feeding adjusting mechanism 50.Above-mentioned toggle-action lever 41 is configured to its length direction approximately along X-direction, if under The integral cycle rotating of axle 33 and be driven, then the other end of toggle-action lever 41 by eccentric cam with the offset of the eccentric cam Length direction of two times of the stroke along the toggle-action lever 41 carries out reciprocating action.The reciprocating action of above-mentioned toggle-action lever 41 is adjusted via feeding Section mechanism 50 is transmitted as reciprocating rotary power to horizontal feed axle 42.

Feeding adjusting mechanism 50 is as shown in Fig. 2 have：Swing arm 51, its fixed equipment in horizontal feed axle 42, and to Extend on the outside of radial direction centered on horizontal feed axle 42；A pair of first connecting rod bodies 53, it is by the other end of toggle-action lever 41 Portion and swing arm 51 link；A pair of second connecting rod bodies 54, the vibration-direction of the other end of toggle-action lever 41 is directed to by it Arbitrary direction；Feeding adjusting body 55, it determines the guide direction realized by second connecting rod body 54；Fulcrum 52, itself and feeding Regulation body 55 is integratedly rotated；Input arm 56, its fixed equipment is in fulcrum 52, and to the radial direction centered on fulcrum 52 Outside extends；Feeding adjusting motor 57, it rotates feeding adjusting body 55, to the X-axis transmitted from lower axle 33 to feeding station 32 The reciprocating action amount in direction (horizontal direction) is adjusted；And 2 transmission connecting rods 58,59, it is from feeding adjusting motor 57 The axial transmission of input arm 56 rotatory force of output.

The other end of the one end of first connecting rod body 53 and toggle-action lever 41 links, the other end of first connecting rod body 53 with The swing end of swing arm 51 links, and this both ends is linked in the way of it can be rotated around Y-axis.

The one end of second connecting rod body 54 and the one end of first connecting rod body 53 connect with the other end of toggle-action lever 41 together Knot, the other end of second connecting rod body 54 and the pivoting end of feeding adjusting body 55 link, and this both ends is with can be around Y-axis turn Dynamic mode links.

There is the fulcrum 52 along Y direction in the base end part fixed equipment of feeding adjusting body 55, the fulcrum 52 is in sewing machine stand It is interior rotationally to be supported around Y-axis.

In addition, the pivoting end of feeding adjusting body 55 is another with second connecting rod body 54 in the way of it can be rotated around Y-axis End links.

In feeding adjusting mechanism 50, if rotating feeding adjusting body 55, to connect as first connecting rod body 53 and second The consistent state of the respective length direction of the body of rod 54, each gonnecting rod body 53,54 just overlapping state is become, then as toggle-action lever The state that 41 driving force is not transmitted to swing arm 51.Now, due to not to the transmission reciprocating rotation action of horizontal feed axle 42, institute Reciprocal stroke using the X-direction of feeding station 32 is 0, i.e. sewing spacing is 0.It is as noted above, each gonnecting rod body will be turned into 53rd, the rotational angle of the feeding adjusting body 55 of 54 overlapping states, is used as " the neutral angle of feeding adjusting body 55 ".

Also, if making the feeding adjusting body 55 be rotated from neutral angle to a direction, then measure phase with its angle of rotation Accordingly apply reciprocal wobbling action to the side of swing arm 51, thereby, it is possible to increase the sewing spacing of positive direction of feed.

In addition, if making the feeding adjusting body 55 be rotated from neutral angle to opposite direction, then it is still able to and its angle of rotation Measurement accordingly applies reciprocal wobbling action to the side of swing arm 51, but in the case, is transmitted to phasing back, by This, can increase the sewing spacing of inverse direction of feed.

Y direction one end side of the feeding adjusting motor 57 in sewing machine base portion 101, makes output shaft towards Y-axis Direction and configure.Foregoing transmission connecting rod 58 makes its length direction be approximately towards X-direction, and one end fixed equipment is in feeding Adjust the output shaft of motor 57.Therefore, by the driving of feeding adjusting motor 57, above and below the other end for transmitting connecting rod 58 Rotated.

In the state of the length direction of transmission connecting rod 59 is approximately along Z-direction, the bottom of connecting rod 59 is transmitted with can The mode and the other end of transmission connecting rod 58 rotated around Y-axis links.Therefore, by the driving of feeding adjusting motor 57, pass Connecting rod 59 is passed integrally to move up and down.

In fulcrum 52, and from fulcrum 52, direction extends the fixed equipment of input arm 56 substantially along the x-axis, the extension of input arm 56 End is linked in the way of it can be rotated around Y-axis with the upper end of transmission connecting rod 59.

, can be via transmission connecting rod 58,59 and input arm 56 if feeding adjusting motor 57 drives by these And rotate feeding adjusting body 55.

Horizontal feed axle 42 is rotatably supported in sewing machine base portion 101 along Y direction, relative to lower axle 33 Configuration is in the direction of feed downstream (left in Fig. 1) of cloth.It is upward via foregoing feeding adjusting mechanism 50 from lower axle 33 The one end for stating longitudinal side of body portion 102 of horizontal feed axle 42 applies reciprocating rotary power, from the other end of horizontal feed axle 42 The reciprocating action along X-direction is transmitted to feeding station 32 via horizontal feed arm 43 in portion.

The base end part of horizontal feed arm 43 and the end of the side of needle plate 11 of horizontal feed axle 42 are fixedly connected, horizontal feed arm 43 swing end is linked with the state for being approximately towards top with feeding station 32.

Therefore, horizontal feed arm 43 can be such that feeding station 32 enters along X-direction by the driving of sewing machine electromotor 16 Row is moved back and forth.In addition, the stroke of the reciprocating action along X-direction of feeding station 32, can be by feeding adjusting mechanism 50 Feeding adjusting motor 57 be controlled and arbitrarily adjust.

Feeding station 32 is configured in the lower section of needle plate 11, one end and bottom and top feed in cloth direction of feed (X-direction) Mechanism 60B links, and the other end links with horizontal feed arm 43.In addition, in the upper of the length direction centre position of feeding station 32 Portion's fixed equipment has feeding tooth 31.

Accordingly, for feeding station 32, reciprocating driving force is applied in along the vertical direction from one end, from the other end with phase The reciprocating driving force of direction of feed is applied in the cycle.Also, by the way that above-mentioned reciprocating driving force is synthesized, so that along X-Z plane Carry out long circular motion.Feeding tooth 31 concomitantly also carries out long circular motion with the feeding station 32, on the top of the oval movement locus When region is moved, the leading section of feeding tooth 31 is protruded upward from the opening portion of needle plate 11, and cloth can be conveyed.

[bottom and top feed mechanism]

Fig. 3 is bottom and top feed mechanism 60B oblique view, and Fig. 4~Fig. 6 is bottom and top feed mechanism 60B action specification figure.

Bottom and top feed mechanism 60B has：Bottom and top feed motor 66, it turns into the above-below direction applied to feeding station 32 The driving source of the reciprocating action of (Z-direction)；First connecting rod 61B, the output shaft of itself and the bottom and top feed motor 66 links, and enters Row rotational action；Second connecting rod 62B, one end and first connecting rod 61B pivoting end link；Third connecting rod 63B, its one end Portion and second connecting rod 62B the other end link；Rotary shaft 67, itself and third connecting rod 63B the other end links, and position It is fixed in sewing machine stand；Fourth link 64, it links via the rotary shaft 67 and third connecting rod 63B；And the 5th connecting rod 65, one end and the pivoting end of the fourth link 64 link, and the other end and the one end of feeding station 32 link.

Replace above-mentioned bottom and top feed mechanism 60B in addition, it is also readily appreciated that, and be changed to use motor, eccentric cam With the structure or the structure using motor, rack-and-pinion of connecting rod.

Bottom and top feed motor 66 is configured at the end of the side of needle plate 11 in Y direction in sewing machine base portion 101, Feeding adjusting motor 57 in Y direction with foregoing feeding adjusting mechanism 50 is remotely configured.Above-mentioned motor 57,66 is all Wider installation space is needed, but is remotely matched somebody with somebody in its longitudinal direction in sewing machine base portion 101 by as noted above Put, so as to ensure space to each other, it can be ensured that the other structures of sewing machine for example needed in the same manner as motor compared with The solenoidal installation space of the driving source as thread cutter 14 of wide installation space.

In addition, being configured to make its output shaft along Y direction by bottom and top feed motor 66.

Also, bottom and top feed motor 66 using with the foregoing same size of feeding adjusting motor 57 and same performance, Machine and classification identical motor.

Thereby, it is possible to realizing the generalization of motor and its circumferential component, can cost of implementation reduce and maintainability Improve.

The first connecting rod 61B base end part as center of rotation is fixedly supported to the output shaft of bottom and top feed motor 66.

On the other hand, third connecting rod 63B the other end is fixedly supported to rotary shaft 67, the rotary shaft 67 rotatably by The framework support in sewing machine base portion 101.

Also, first connecting rod 61B pivoting end and third connecting rod 63B pivoting end around Y-axis respectively can rotate Mode and second connecting rod 62B one end and the other end link.

Also, as shown in figure 4, above-mentioned first~third connecting rod 61B~respective length of 63B is set as, in first connecting rod 61B be with Z-direction is almost parallel and its pivoting end state upward and third connecting rod 63B be with Z-direction substantially In the case of the parallel and state of its pivoting end downward, second connecting rod 62B is as level substantially parallel with X-direction State.

Thus, if the output shaft of bottom and top feed motor 66 is set into the shaft angle degree (0 °) shown in Fig. 4, first connecting rod 61B and second connecting rod 62B turns into 90 degree (right angle).The state is during the connecting rod being made up of first~third connecting rod 61B~63B is arranged " origin ".

Under the shaft angle degree as above-mentioned " origin ", feed tooth 31 height and the upper surface of needle plate 11 it is highly consistent.

In addition, will turn into " origin " shaft angle degree as benchmark, if made as shown in Figure 5 to opposite direction (counter clockwise direction) The rotation driving of bottom and top feed motor 66, then feed tooth 31 and rise compared with the upper surface of needle plate 11, if as shown in Figure 6 to just Direction (clockwise direction) makes the rotation driving of bottom and top feed motor 66, then under feeding tooth 31 compared with the upper surface of needle plate 11 Drop.

In addition, in sewing machine 100, its control device 90 is every time by feeding the corresponding with each pin of the realization of tooth 31 During feed motion, following actions control is performed to bottom and top feed motor 66, i.e. being not up to as first connecting rod 61B and In the angular range of the output shaft angle for the maximum elongation state that second connecting rod 62B is arranged on the same line (for example origin ± 10 °) carry out a both forward and reverse directions reciprocating rotation.

It is as noted above, turning bottom and top feed motor 66 is arranged by first~third connecting rod 61B~63B connecting rods constituted Applications of dynamic action and the up and down action to feeding station 32 is maintained the frequency of equimultiple, therefore, if with utilization relative to sewing The situation that the independent motor of electric motor 16 applies the reciprocating action of the feeding of horizontal direction is compared, then due to reciprocal stroke It is small, so excellent for the tracing ability of the sewing of high speed rotation.Especially, by including first by bottom and top feed motor 66 The scope of the shaft angle degree at connecting rod 61B and second connecting rod 62B formation right angle is driven, so as to further reduce reciprocal row Journey, can further improve the tracing ability for the sewing of rotation at a high speed.

Further, since base end part is fixed on rotary shaft 67 by fourth link 64 with the state in direction substantially along the x-axis, so the Double leval jib 64 is integratedly rotated with third connecting rod 63B.

Also, the 5th connecting rod 65 is connected one end and the pivoting end of fourth link 64 with the state approximately along Z-direction Knot, and the one end of the other end and feeding station 32 links, therefore, it is possible to by the rotation of fourth link 64 via the 5th Connecting rod 65 is moved up and down to the transmission of feeding station 32.

[thread cutter]

Thread cutter 14 has：Fixed cutting tool and movable cutting knife, they are configured between feeding tooth 31 and kettle 12；Cam, It is arranged at lower axle 33；Cam bawl, it engages with cam, and cutoff action is applied to movable cutting knife；And solenoid, it makes convex Wheel roller engages with cam.Solenoid is worked by the control of control device 90, by solenoidal work, cam bawl with Cam engages, and reciprocal cutoff action is transmitted to movable cutting knife, will be upper by the co-operating of movable cutting knife and fixed cutting tool Line and offline cut-out.

[cloth pressing mechanism]

Fig. 7 is the side view of cloth pressing mechanism 70, and the part and a mesh of sewing machine stand 110 are shown with double dot dash line Configuration in sewing machine stand 110 so is shown.In addition, Fig. 8 is the front view of the cloth pressing mechanism 70 from facing side, Fig. 9 It is the oblique view of the structure for the cloth pressing mechanism 70 for representing facing side.

As shown in these figures, cloth pressing mechanism 70 has：Cloth pressing 71, it is pressurized from above by sewn object；Presser feet Rod 72, cloth pressing 71 is kept in its bottom；Presser foot motor 73, it turns into the lifting driving source of cloth pressing 71；Transmission Mechanism 74, it is from presser foot motor 73 to foot-pressing bar 72 and the transmission lifting action of cloth pressing 71；Presser feet spring 75, it is via pressure Pin rod 72 applies the foot pressure for sewn object to cloth pressing 71；And presser feet height detection portion 76, it is to cloth presser The height of pin 71 is detected.

Cloth pressing 71 is the so-called ship that bottom surface is smooth and cloth direction of feed upstream side (proximal lateral) is tilted upward The presser feet of shape.

Foot-pressing bar 72 the vicinity of needle bar by the way of it can be moved up and down along in the state of Z-direction by sewing machine The inside of arm 103 be configured above and below metal bearing 721,721 at 2 support.

Between the metal bearing 721 of the upside of foot-pressing bar 72 and the metal bearing 721 of downside, vertically fixed equipment has Upper paraphysis clasps portion 722 and lower paraphysis clasps portion 723, and portion 722 is clasped to upper paraphysis and lower paraphysis clasps the fixed equipment in portion 723 All it is to be realized by clasping fastening.

Also, the sleeve that can be slided up and down relative to foot-pressing bar 72 is equipped with the downside that upper paraphysis clasps portion 722 725, between the sleeve 725 and lower paraphysis clasp portion 723, foot-pressing bar 72 is inserted to the state of the presser feet spring 75 of coiled type It is equipped with the presser feet spring 75 of the coiled type.

Each rod clasp portion 722,723 and cloth pressing 71 by the fastening of lock-screw fixed equipment in foot-pressing bar 72, lock-screw is gone out by spiral shell and all of which is pulled down, so as to which foot-pressing bar 72 is pulled out upward from sewing machine stand 110 Go out.Also, thus, it is possible to change presser feet spring 75.

On the other hand, for presser feet spring 75, multiple species that its internal diameter is roughly equal, spring constant is different have been prepared Spring, accordingly suitably can select and change with the foot pressure needed for various sewn objects.

In addition, by upper paraphysis clasp portion 722 and lower paraphysis clasp portion 723 between the upper and lower every being set to than the presser feet spring 75 Combined length with sleeve 725 is wider, clasps portion 722 in upper paraphysis and lower paraphysis is clasped between portion 723, by presser feet spring 75 Equipped with sleeve 725 in the way of with some surpluses.

Sleeve 725 is the cylindrical body that can be inserted for foot-pressing bar 72, by presser foot motor 73 via transmission mechanism 74 Lifting action is applied in, arbitrary height is positioned at.

If for example, declining sleeve 725 by presser foot motor 73, the presser feet spring 75 of downside is compressed, and is compressed The elastic force of presser feet spring 75 clasp portion 723 via lower paraphysis and apply to cloth pressing 71.Now, arbitrarily positioning sleeve is passed through The height of cylinder 725, so as to which presser feet spring 75 is compressed into arbitrary decrement, can be adjusted to arbitrary foot pressure.

In addition, if rising sleeve 725 by presser foot motor 73, then sleeve 725 is clasped portion 722 with upper paraphysis and supported Connect, clasping portion 722 via upper paraphysis rises foot-pressing bar 72, thus enables that cloth pressing 71 retreats to the top to needle plate 11 The off-position of remote sewn object.

In addition, the length of foot-pressing bar 72 is set as, even in make cloth pressing 71 drop to needle plate 11 upper surface shape Under state, the state that the upper end also as the foot-pressing bar 72 is protruded from the top of sewing machine arm 103 is equipped with the upper end For the grip part 724 for being drawn high cloth pressing 71 with hand grip.

Because cloth pressing mechanism 70 can carry out the lifting action of cloth pressing 71 by presser foot motor 73, so Be not equipped with it is such as being equipped in existing sewing machine, carry out cloth presser for being operated by manual linkage The presser feet raising wire of the lifting action of pin 71.

But, if the supply of the power supply of sewing machine is interrupted because of power failure etc., the state declined as cloth pressing 71, Therefore, it is configured to, in the upper end equipment grip part 724 of foot-pressing bar 72, easily can carries out cloth pressing 71 upward Keep out of the way movement.

Presser foot motor 73 longitudinal body portion 102 inside upper part so that the output shaft of the presser foot motor 73 is towards X The state of direction of principal axis is supported by the bracket 731 of tabular.

Presser foot motor 73 is stepping motor, can be positioned at arbitrary shaft angle degree with defined minute angle unit.

In addition, though eliminating diagram in Fig. 7~Fig. 9, but encoder is connected with the output shaft of presser foot motor 73 732 (reference pictures 13), the encoder 732 is detected to the shaft angle degree of output shaft, and is inputted to control device 90.

Transmission mechanism 74 has：Driving gear 741, its fixed equipment is in the output shaft of presser foot motor 73；It is generally fan-shaped Driven gear 742；The linkage component 745 of crank throw shape, it has forked rotation wrist 746,747；And connecting rod 749, its Driven gear 742 and linkage component 745 are linked.

Driving gear 741 is spur gear, is engaged with driven gear 742.

Driven gear 742 is the fan-shaped gear supported with being turned about the X axis in sewing machine stand 110, only at it The tooth for being formed in part with engaging with driving gear 741 of arc-shaped.The tooth of driven gear 742 is effective compared with driving gear 741 It is relatively large in diameter, the rotation inputted from driving gear 741 is significantly slowed down and transmitted.Thereby, it is possible to improve by presser feet The resolution capability of the decrement regulation for the presser feet spring 75 that motor 73 is realized.

In addition, driven gear 742 has the wrist 743 extended along radius of gyration direction, the wrist 743 can turn around X-axis One end dynamicly with connecting rod 749 links.If driven gear 742 receives moment of torsion from driving gear 741 and rotated, right The one end of connecting rod 749 applies the shift action approximately along Y direction.

Connecting rod 749 is configured in sewing machine arm 103 with the state approximately along Y direction, the other end of connecting rod 749 Portion links in which can turn about the X axis with the rotation wrist 746 of the side of linkage component 745.

The rotation wrist 746 of the side of linkage component 745 is approximately towards Z-direction, and the rotation wrist 747 of opposite side is approximately towards Y direction, linkage component 745 is supported in which can be turned about the X axis in sewing machine stand 110.In addition, the rotation wrist of opposite side 747 link via square slider 748 with sleeve 725.Square slider 748 links in which can turn about the X axis with rotating wrist 747, shape As rectangular shape.Sleeve 725 is supported with the state square shaped sliding block 748 that square slider 748 is clipped above and below, is allowed The shift action along Y direction of square slider 748.

Thus, if linkage component 745 carries out rotational action, rotate wrist 747 and rotated in above-below direction, via square cunning Block 748 transmits the shift action of above-below direction to sleeve 725.Square slider 748 is by rotating the rotation of wrist 747 according to circular arc Track move, therefore, displacement is also produced in Y direction, but because square slider 748 can be along Y relative to sleeve 725 Direction of principal axis is moved, so only transmitting the shift action of Z-direction to sleeve 725.

Presser feet height detection portion 76 is mainly made up of components described below：Detected body 761, it is supported in lower paraphysis and clasps portion 723；And linear transducer 762, its height optically to detected body 761 detects.

Detected body 761 clasps portion 723 due to being supported in lower paraphysis, so together with cloth pressing 71 and foot-pressing bar 72 Vertically move.

Linear transducer 762 is to be arranged along Z-direction formed by photo detector, by being blocked by detected body 761, from And the position (height) of the Z-direction of the upper end of the detected body 761 can be detected.

[control system of sewing machine]

The control system of above-mentioned sewing machine 100 is shown in Figure 13 block diagram.As shown in Figure 13, sewing machine 100 has Carry out the control device 90 of the action control of each structure.Moreover, in the control device 90 via each motor drive circuit 16a, 57a, 66a, 73a and be connected with sewing machine electromotor 16, feeding adjusting motor 57, bottom and top feed motor 66 and pressure Pin motor 73.

In addition, being attached to the encoder detected to its rotation number in sewing machine electromotor 16 and presser foot motor 73 161st, 732, the encoder 161,732 is also connected via motor drive circuit 16a, 73a with control device 90.

In addition, being connected with thread cutter 14 in control device 90, the solenoid being driven when performing tangent line is by controlling Device 90 is controlled.

Control device 90 has CPU 91, ROM 92, RAM 93, EEPROM 94 (EEPROM is registration mark), after execution The various action controls stated.

It is stored with ROM 92 for the program for carrying out various controls described later.

In addition, being stored with table data in EEPROM 94, the table data represent the pressure of the multiple species different from spring constant Each difference of pin spring 75 is corresponding, presser foot motor 73 actuating quantity and the foot pressure that produces in cloth pressing 71 it Between relation.That is, EEPROM94 works as " table storage part ".

In addition, being connected with operation inputting part 96 via interface 96a in control device 90, the operation inputting part 96 is used for defeated Enter to be directed to the selection, execution, the cloth realized by cloth pressing mechanism 70 of the various action controls of feed arrangement 30 described later The setting of the foot pressure of presser feet 71 etc..Thus, " the presser feet pressure that operation inputting part 96 is set as the input for carrying out foot pressure Work power configuration part ".

In addition, be connected with pedal 95 via interface 95a, the pedal 95 inputted by brake pedal operation the beginning of sewing with And sewing speed corresponding with entering amount.

The operation inputting part 96 has display part 961, and the information for inputting required during various settings is shown.For example, In the case where the foot pressure of the cloth pressing 71 to being realized by cloth pressing mechanism 70 is set, to foot pressure The numerical value amplitude (resolution capability) of the higher limit of setting, lower limit and the foot pressure that can be set is shown.

In addition, being connected with detected to the height of cloth pressing 71 linear via interface 95a in control device 90 Sensor 762.

Also, wired adjuster 101 is connected via interface 101a in control device 90, the line adjuster 101 passes through control Make to solenoidal current value and then line tension is adjusted.

[action control of feed arrangement]

In sewing machine 100, feeding tooth 31 is carried out by bottom and top feed motor 66 independently of sewing machine electromotor 16 The reciprocating action of above-below direction, therefore by being controlled to bottom and top feed motor 66, so as to arbitrarily change feeding The mobile track that rotates of tooth 31.

Figure 14 is the track in the case of the common feeding of progress.Transverse axis represents to feed the X-direction of tooth 31 in fig. 14 Position, the longitudinal axis represent Z-direction feeding tooth 31 position.It is direction of feed downstream on the left of transverse axis, transverse axis turns into 0 Position be needle downing position.In addition, the position for turning into 0 of the longitudinal axis is the height of the upper surface of needle plate 11.

In the track, the upper surface of needle plate 11 is turned into substantially symmetric oval up and down as benchmark.In addition, will enter The scope of upper shaft angle degree when tooth top (upper end) to tooth 31 is located at the position more than upper surface of needle plate 11 is defined as " feeding It is interval ".

Track pattern data are stored in EEPROM 94 by control device 90, and the track pattern data are by this The each position of the point arranged on oval track to the shaft angle degree of the bottom and top feed motor 66 that is positioned of feeding tooth 31 and The data that upper shaft angle degree is associated and records.

In addition, the shaft angle degree of feeding adjusting motor 57 determines the width (sewing spacing) of the transverse axis of oval track, because If this is from the setting sewing spacing of operation inputting part 96, feeding tooth rotate it is mobile during maintain to make sewing spacing into For the shaft angle degree of setting value.

Moreover, control device 90 reads in track pattern data to RAM 93, the output to encoder 161 in sewing Monitored, when shaft angle is spent on as defined in turning into every time, bottom and top feed motor 66 is positioned in the pattern data of track The shaft angle degree of defined, thus makes feeding tooth 31 carry out the movement that rotates according to Figure 14 track.

Figure 15 represents the shaft angle degree (longitudinal axis) and upper shaft angle degree of the bottom and top feed motor 66 obtained by Figure 14 track The relation of (transverse axis).

The change of the shaft angle degree of bottom and top feed motor 66 in Figure 14 track pattern, as shown in figure 15, as substantially Corresponding to 2 π sine curve.

Further, since being feeding tooth is vertically carried out one back and forth by a reciprocating rotation of positive direction and opposite direction Relation, therefore need not be ready to pass through clockwise rotating obtained track pattern data and by anticlockwise turn Dynamic obtained track pattern data both track pattern data, only preserve a kind of track pattern data.

[processing related to cloth pressing mechanism]

The cloth pressing mechanism 70 of sewing machine 100 as illustrated as the former, can be from the pressures of the different multiple species of spring constant Selection determines the presser feet spring 75 of foot pressure in pin spring 75, and is changed.Therefore, control device 90 is according in ROM 92 Program, when the main power source of sewing machine 100 is connected, carry out following processing, i.e. be that spring is normal to furnished presser feet spring 75 Any of presser feet spring 75 of the different multiple species of number is identified.

Below, the flow chart of the action specification figure and Figure 16 of the cloth pressing mechanism based on Figure 10~Figure 12, to above-mentioned pressure Pin spring identifying processing is illustrated.

If the main power source of sewing machine 100 is connected, control device 90 makes presser foot motor 73 to positioned at needle plate 11 first Top retreating position cloth pressing 71 decline direction be driven (step S1：Figure 10).

While declining cloth pressing 71, one side control device 90 is to the cloth pressing detected by linear transducer 762 71 height is monitored.Then, the detection height of the cloth pressing 71 according to linear transducer 762, to cloth pressing 71 upper surfaces for whether dropping to needle plate 11 are judged (step S3：Figure 11).If cloth pressing 71 is reached by decline The upper surface of needle plate 11, then the detection height of the cloth pressing 71 shown in linear transducer 762 turns into from decline state stops shape State.Judge thereby, it is possible to upper surface that needle plate 11 whether is dropped to cloth pressing 71.

Thus, (the step S3 in the case where being determined as that cloth pressing 71 does not reach the upper surface of needle plate 11：NO), cloth is made Expect that presser feet 71 continues to decline (step S1), (the step S3 in the case where being determined as the upper surface of the arrival needle plate 11 of cloth pressing 71： YES), the motor position shown in the encoder 732 when reaching is stored as origin position, also, from the origin position with pre- The ormal weight first determined makes presser foot motor 73 be driven (step S5 to descent direction：Figure 12).

The driving current for the presser foot motor 73 that 90 pairs of control device is supplied by motor drive circuit 73a detects, Incrementss to driving current relative to origin position are detected (step S7).If carried out from origin position under ormal weight Drop is acted, then presser feet spring 75 shrinks certain length, therefore, presser feet is obtained by the incrementss according to driving current electronic The moment of torsion ascending amount of machine 73, so as to determine the spring constant of presser feet spring 75.Therefore, control device 90 can be according to driving The incrementss of electric current, and be the pressure of the different multiple species of spring constant to the presser feet spring 75 for being currently installed on foot-pressing bar 72 Any of pin spring 75 is identified (step S9 [spring category identification function]).

Also, control device 90 is from the actuating quantity for recording the expression presser foot motor 73 in EEPROM 94 and in cloth In multiple table data of relation between the foot pressure that presser feet 71 is produced, table number corresponding with current presser feet spring 75 is selected According to (step S11).

Also, the upper limit of the foot pressure shown when control device 90 is for setting foot pressure in operation inputting part 96 The numerical value amplitude (resolution capability) of value, lower limit and the foot pressure that can be set, is set as corresponding with current presser feet spring 75 Value (step S13).

Then, control device 90 terminates the determination processing of presser feet spring 75.

In addition, after above-mentioned processing, when the setting input of foot pressure is carried out from operation inputting part 96, in display part 961, show the numerical value width of the higher limit, lower limit and the foot pressure that can be set of the foot pressure set out in step s 13 Spend (resolution capability), to limit foot pressure more than or equal to shown lower limit and less than or equal to the scope of higher limit Input, also, numerical value input is received with the unit of the numerical value amplitude for the foot pressure that can be set.

In addition, if the foot pressure of cloth pressing 71 is set, then 90 pairs of control device is selected in step s 11 Table data carry out reference, make presser foot motor 73 driving to turn into set foot pressure shaft angle degree, and be controlled with Keep the shaft angle degree.

[parameter modification caused by jumping onto cloth stage portion]

In the foregoing, if presser feet height detection portion 76 detects that cloth pressing 71 jumps onto the thickening step of cloth Portion, then control device 90 is shown as the following description, is controlled with by the parameter modification related to sewing.

Control device 90 is in sewing by the detection of the linear transducer 762 of cloth pressing mechanism 70 and to cloth pressing Whether 71, which be located at the positions for being less than defined height at a distance of needle plate 11, is monitored, detect cloth pressing 71 as being more than or In the case of equal to defined height, it is determined as " having stage portion ".

[change of 1. foot pressures]

First, if presser feet height detection portion 76 detects that cloth pressing 71 jumps onto the situation of stage portion, control device 90 pairs of presser foot motors 73 are controlled, and becoming strong mode with the foot pressure for making cloth pressing 71 is corrected.

It is as noted above, by detecting that cloth pressing 71 jumps onto the situation of stage portion, by the presser feet pressure of cloth pressing 71 Power strengthens, so as to apply stronger foot pressure to the cloth pressing 71 for jumping onto stage portion, is protected between feeding tooth 31 Hold cloth and sewed well.

[2. feeding tooth height change]

Below, if presser feet height detection portion 76 detects that cloth pressing 71 jumps onto the situation of stage portion, control device 90 pairs of bottom and top feed motor 66 are controlled, and school is carried out in the way of the height of the feeding tooth 31 in making feeding interval is uprised Just.

It is as noted above, by detecting that cloth pressing 71 jumps onto the situation of stage portion, it is set to the feeding in feeding interval The track that the height of the tooth top of tooth 31 is uprised, so as to follow jump onto stage portion cloth pressing 71 and by feeding tooth 31 lift Height, the constant state of the distance maintaining of cloth pressing 71 and feeding tooth 31 is kept to cloth and stitched well System.

[change of 3. line tensions]

Below, if presser feet height detection portion 76 detects that cloth pressing 71 jumps onto the situation of stage portion, control device 90 pairs are controlled to solenoidal current value, and the enhanced mode of line tension realized by line adjuster 101 is carried out into school Just.

It is as noted above, by detecting that cloth pressing 71 jumps onto the situation of stage portion, by the line tension of line adjuster 101 Enhancing, is sewed well so as to prevent LSOR.

[effect of embodiment]

More than, according to the sewing machine 100 of embodiment, horizontal feed mechanism 40 has feeding adjusting motor 57, and this enters To the horizontal direction for feeding station 32 realized by sewing machine electromotor 16 of 57 pairs of motor of regulation reciprocating action amount ( Away from) change regulation is carried out, bottom and top feed mechanism 60B has the drive for the reciprocating action for turning into the above-below direction applied to feeding station 32 The bottom and top feed motor 66 in dynamic source, the sewing machine 100 has control device 90, and the control device 90 is to feeding adjusting motor 57 and bottom and top feed motor 66 be controlled, carry out by feed tooth 31 realize sewn object feed motion.

Accordingly, with respect to reciprocating action of the feeding tooth about 31, can arbitrarily it act without by sewing machine electromotor 16 Limitation, therefore, as illustrated as the former, feeding tooth 31 can be made rotate movement with diversified track pattern.

In addition, the reciprocating action of the horizontal direction on feeding tooth 31, even if will be independent of its of sewing machine electromotor 16 His motor is set to driving source, is also able to carry out the part in the various track patterns of foregoing feeding tooth 31.But, level The reciprocating stroke in direction is much larger than the reciprocating stroke of above-below direction, it is therefore desirable to export larger electronic with lower inertia Machine.If additionally, there are motor output greatly, inertia also becomes big tendency, therefore is difficult to obtain such electricity in practice Motivation, therefore have no alternative but reduce sewing speed and fed.

On the other hand, in the sewing machine 100 of embodiment, the driving of the reciprocating action of the horizontal direction of tooth 31 will be fed Source is set to sewing machine electromotor 16, and the driving source that will feed the reciprocating action of the above-below direction of tooth 31 is set to bottom and top feed motor 66, therefore moving up and down on feeding tooth 31, carry out back and forth, being used as bottom and top feed electricity in the scope of small reciprocating stroke Motivation 66 and the motor for small-sized, the low output being readily obtained can be used.Moreover, can be with the rail of more rich feeding tooth 31 Mark pattern is fed.

In addition, the regulation of sewing spacing uses presently used feeding adjusting body 55 and the knot of feeding adjusting motor 57 Structure, therefore reliability and stability are high, be high accuracy.

Also, the control device 90 of sewing machine 100 is controlled to presser foot motor 73, with cause cloth pressing 71 from Needle plate 11 carries out down maneuver compared to state remote upward, and the control device 90 has following spring category identification functions, That is, it is spring to presser feet spring 75 based on the reaction force being subject to from presser feet spring 75 during the decline of cloth pressing 71 Any of presser feet spring 75 of the different multiple species of constant is judged, therefore, it is possible to replaceable presser feet spring 75 Spring species be determined.

, can be with width thereby, it is possible to the spring species for the presser feet spring 75 for inerrably recognizing and using multiple spring constants The spring pressure of scope arbitrarily sets foot pressure, and a greater variety of sewn objects can be sewed.

In addition, the storage table data of EEPROM 94 of control device 90, the table data represent different from spring constant multiple Each difference of the presser feet spring 75 of species is corresponding, presser foot motor 73 actuating quantity and the pressure produced in cloth pressing 71 Relation between foot press power, CPU 91 carries out following controls, i.e. based on the presser feet with being determined by spring category identification function The corresponding table data of spring 75 and set foot pressure, therefore, it is not necessary to set the species of input presser feet spring 75, it becomes possible to automatic Ground determines appropriate table data, and is adjusted to turn into appropriate foot pressure.

In addition, control device 90 is controlled to the display part 961 of operation inputting part 96, enable to and by spring kind The presser feet spring 75 that class identification function is determined accordingly, changes the higher limit of spring pressure that can be set and the bullet that can be set The numerical value amplitude (resolution capability) of spring pressure and inputted, it is therefore not necessary to set the species of input presser feet spring 75, it becomes possible to Carry out the setting of appropriate foot pressure.

Especially, if presser feet height detection portion 76 detects that cloth pressing 71 jumps onto the feelings of the thickening stage portion of cloth Condition, then by by control device 90 by the parameter modification related to sewing, even if so that cloth pressing 71 jumps onto stage portion, also can It is enough that cloth is kept between cloth pressing 71 and feeding tooth 31 and is sewed well.

That is, by detecting that cloth pressing 71 jumps onto the situation of stage portion, the foot pressure of cloth pressing 71 is strengthened, from And stronger foot pressure can be applied to the cloth pressing 71 for jumping onto stage portion, feeding tooth 31 between keep cloth and it is good Sewed well.

Also, by detecting that cloth pressing 71 jumps onto the situation of stage portion, by the height of the feeding tooth 31 fed in interval Degree increases, and jumps onto the cloth pressing 71 of stage portion so as to follow and raises feeding tooth 31, cloth pressing 71 and will enter The constant state of distance maintaining to tooth 31 is kept to cloth and sewed better.

In addition, by detecting that cloth pressing 71 jumps onto the situation of stage portion, the line tension of line adjuster 101 is strengthened, Sewed more well so as to prevent LSOR.

[other]

In addition, in the embodiment of foregoing invention, when detecting that cloth pressing 71 jumps onto the situation of stage portion, by cloth Expect presser feet 71 foot pressure enhancing but it is also possible to be, presser foot motor 73 is controlled, it is firm in cloth pressing 71 to cause Start to jump onto after stage portion, the foot pressure of cloth pressing is weakened, after the stipulated time, by the presser feet of cloth pressing 71 Pressure strengthens.

Alternatively, it is also possible to be, when detecting that cloth pressing 71 jumps onto the situation of stage portion, in foregoing parameter modification On the basis of, sewing machine electromotor 16 is controlled to slow down the rotary speed of main shaft.

In addition, in the embodiment of foregoing invention, sewing machine for covering chain stitch is illustrated, but feed arrangement 30 is for utilizing Any type of sewing machine for conveying sewn object to tooth is all suitable for.

In addition, in the embodiment of foregoing invention, directly being installed simultaneously to the output shaft in bottom and top feed motor 66 The situation for being linked with first connecting rod 61B is illustrated, but it is also possible to connected in the output shaft of bottom and top feed motor 66 and first Between bar 61B insert transferring element, transmission mechanism and link indirectly.

In addition, for other concrete details construction etc., also can suitably change certainly.

Claims

1. a kind of sewing machine, it is characterised in that have：

Suture needle reciprocating mechanism, it moves up and down needle bar；

Horizontal feed mechanism, it obtains power from the sewing machine electromotor, and the reciprocal of horizontal direction is transmitted to the feeding station Action；

Cloth pressing, it is pressurized from above by the sewn object；And

The horizontal feed mechanism has feeding adjusting motor, and the feeding adjusting motor is to passing through the sewing machine electromotor The spacing of the reciprocating action for the horizontal direction for the feeding station realized carries out change regulation,

The bottom and top feed mechanism has the upper of the driving source for the reciprocating action for turning into the above-below direction applied to the feeding station Lower feeding motor,

The sewing machine has control device, and the control device is controlled to the bottom and top feed motor, to cause if by The presser feet height detection portion detects that the cloth pressing jumps onto the thickening stage portion of the sewn object, then will feeding interval In the height of the feeding tooth raise.

2. sewing machine according to claim 1, it is characterised in that have：

Foot-pressing bar, the cloth pressing is kept in its bottom；

Presser feet spring, it applies the foot pressure for the sewn object via the foot-pressing bar to the cloth pressing；With And

Presser foot motor, it applies the lifting action of the cloth pressing, and the stroke of the presser feet spring is adjusted Section, the foot pressure for the sewn object applied by the cloth pressing is adjusted,

The control device carries out following controls, i.e. if detecting that the cloth pressing jumps by the presser feet height detection portion The upper stage portion, then be controlled to the presser foot motor, strengthens the institute that the cloth pressing is directed to the sewn object State foot pressure.

3. sewing machine according to claim 1 or 2, it is characterised in that

The presser feet height detection portion is by the detected body that is vertically moved together with the cloth pressing and optically examines The linear transducer for surveying the height of the detected body is constituted.

4. sewing machine according to claim 1 or 2, it is characterised in that

With by being controlled to the current value flowed to solenoid, make the tension force of the line of the sewing sewn object variable Line adjuster,

The control device carries out following controls, i.e. if detecting that the cloth pressing jumps by the presser feet height detection portion The upper stage portion, then to being controlled to the solenoidal current value, enhancing is described by line adjuster realization The tension force of line.

5. sewing machine according to claim 3, it is characterised in that