CN103290621B - Sewing machine - Google Patents

Abstract

An object of the present invention is to provide a sewing machine capable of increasing the efficiency of sewing operations. The sewing machine comprises a main motor and a cloth feeding motor. The main motor allows needle moving up and down. The main motor allows a feeding tooth moving up and down. The cloth feeding motor allows the feeding tooth moving forward and backward. A CPU of the sewing machine acquires the cloth thickness of the cloth. When the cloth thickness is below a threshold, the CPU performs drive control on the main motor and the cloth feeding motor, so as to drive the feeding tooth according to a track for a thin object. When the cloth thickness is above the threshold, the CPU performs drive control on the main motor and the cloth feeding motor, so as to drive the feeding tooth according to a track for a thick object. The starting time of the feeding tooth moving along the track of the thick object is later than that of the feeding tooth moving along the track of the thin object. The ending time e of the feeding tooth moving along the track of the thick object is earlier than that of the feeding tooth moving along the track of the thin object.

Description

Sewing machines

Technical field

The present invention relates to a kind of Sewing machines that can change the movement locus of feeding tooth.

Background technology

Exist a kind of can according to the thickness of cloth, material etc., change the Sewing machines of the movement locus of feeding tooth.Sewing machines comprises the mechanism regulated the driving mechanism of feeding tooth.Regulated this mechanism by operator, Sewing machines changes the movement locus of feeding tooth.Japanese Patent Laid-Open No. 42270 Sewing machines described in publication in 2000 comprises the eccentric cam to the control agent that straight feeding axle regulates.Eccentric cam is the mechanism regulated the driving mechanism of feeding tooth.Operator manually regulates the phase place of eccentric cam, and Sewing machines changes movement locus.Operator does not use the instruments such as screwdriver with regard to the phase place of energy eccentric adjustment cam.

Sewing machines changes the movement locus of feeding tooth according to the manual operation of operator.Therefore, Sewing machines spended time on the movement locus changing feeding tooth.The movement locus that Sewing machines needs the thickness according to cloth, the kind of material changes feeding tooth.That is, when the thickness of every substandard cloth, the kind of material change, operator just needs to carry out manual operation.Therefore, Sewing machines possibly cannot carry out making operation efficiently.

Summary of the invention

A kind of energy is the object of the present invention is to provide to improve the Sewing machines making the efficiency of operation.

The Sewing machines of technical scheme 1 comprises: feeding table, and it supports the feeding tooth transferring cloth on carrying direction; Knee-action mechanism, it applies the action of above-below direction to above-mentioned feeding table; And actuating unit, it applies the action in above-mentioned carrying direction to above-mentioned feeding table, also comprises: work feed motor, and it drives above-mentioned actuating unit; Main motor, it drives above-mentioned knee-action mechanism; And motor control part, it carries out drived control to above-mentioned work feed motor, to make above-mentioned feeding table move up in above-mentioned carrying side according to the above-below direction action of the above-mentioned feeding table that above-mentioned knee-action mechanism applies under the driving of above-mentioned main motor, and thick according to the cloth of above-mentioned cloth, make above-mentioned feeding table at least one change in the beginning period and tail end of the action in above-mentioned carrying direction relative to the above-below direction action of above-mentioned feeding table.This Sewing machines makes feeding tooth at least one change in the beginning period and tail end of the action in carrying direction relative to the above-below direction action of feeding tooth by motor control part, thus can change the movement locus of feeding tooth.Therefore, the mechanism that operator regulates without the driving mechanism of manual adjustments to feeding tooth, Sewing machines just can change the movement locus of feeding tooth.Therefore, sewing function cuts down the time of the movement locus changing feeding tooth, can improve the efficiency of making operation.

The Sewing machines of technical scheme 2 comprises the thick thick judging part of cloth whether being in more than threshold value and judging of above-mentioned cloth, when the thick judging part of above-mentioned cloth is judged as that above-mentioned cloth is thick and is in more than above-mentioned threshold value, said motor control part carries out drived control to above-mentioned work feed motor, and above-mentioned tail end when not being judged as that above-mentioned cloth is thick to make above-mentioned tail end being in more than above-mentioned threshold value than the thick judging part of above-mentioned cloth ahead of time.When cloth thick larger time, sewing function tail end is done sth. in advance.Therefore, sewing function prevents eedle before the mobile end of cloth from thrusting cloth, can prevent the reduction of quality of sewing.Therefore, function of sewing improves the efficiency of making operation.

In the Sewing machines of technical scheme 3,4, when the thick judging part of above-mentioned cloth is judged as that above-mentioned cloth is thick and is in more than above-mentioned threshold value, said motor control part carries out drived control to above-mentioned work feed motor, and above-mentioned beginning when not being judged as that above-mentioned cloth is thick to make above-mentioned beginning period being in more than above-mentioned threshold value than the thick judging part of above-mentioned cloth is postponed period.When cloth thick larger time, Sewing machines deferrable starts period.Knee-action mechanism makes feeding table move upward, thus feeding tooth is moved upward.Owing to making feeding tooth move upward when feeding table does not move up in carrying side, therefore, cloth is reliably clipped between presser feet and feeding tooth by function of sewing.Sewing function starts the carrying of cloth under the state of reliably being clamped by cloth.Therefore, cloth thick larger time, feeding tooth also can not skid relative to cloth, sewing function reliably carry cloth.Therefore, function of sewing prevents the reduction of quality of sewing.Cloth is thick be in more than threshold value time, sewing function postpones beginning period automatically.Therefore, the mechanism that regulates without the need to the driving mechanism of manual adjustments to feeding tooth of operator.So sewing function improves the efficiency of making operation.

In the Sewing machines of technical scheme 5 ~ 7, when the thick judging part of above-mentioned cloth is judged as that above-mentioned cloth is thick and is in more than above-mentioned threshold value, said motor control part carries out drived control to above-mentioned work feed motor, and above-mentioned translational speed when not being judged as that above-mentioned cloth is thick to make the translational speed of above-mentioned feeding table on above-mentioned carrying direction being in more than above-mentioned threshold value than the thick judging part of above-mentioned cloth is fast.Even if make midway cloth be thick there occurs change time, Sewing machines is also by accelerating transporting velocity, identical with the carrying amount of cloth after change before making the thick change of cloth.Therefore, cloth is thick there occurs change time, Sewing machines also can not change the interval (length of stitching) of making, and can maintain quality of sewing.

The Sewing machines of technical scheme 8 also comprises the configuration part set multiple threshold value, the thick judging part of above-mentioned cloth judges thick which scope belonged in multiple scopes that above-mentioned multiple threshold value marks off of above-mentioned cloth, according to the above-mentioned scope that the thick judging part of above-mentioned cloth is judged, said motor control part carries out drived control to above-mentioned work feed motor, to change at least one in above-mentioned beginning period and above-mentioned tail end.Sewing function coordinates the thick movement locus changing feeding tooth step by step of the cloth of cloth.Therefore, sewing function transfers cloth suitably according to cloth is thick, can prevent the reduction of quality of sewing.

The Sewing machines of technical scheme 9 comprises switching part, this switching part in the first state and can represent that is the thick large state of cloth of above-mentioned first state of above-mentioned cloth thickness rate switches between the second state, when above-mentioned switching part is in above-mentioned second state, said motor control part carries out drived control to above-mentioned work feed motor, and above-mentioned tail end when being in above-mentioned first state to make the tail end of the action of above-mentioned feeding table on above-mentioned carrying direction than above-mentioned switching part ahead of time.When the thick increase of cloth, operator is by being switched to the second state by switching part, and tail end is done sth. in advance by sewing function automatically.Therefore, sewing function prevents eedle before the mobile end of cloth from thrusting cloth, can prevent the reduction of quality of sewing.The mechanism that operator regulates without the need to the driving mechanism of manual adjustments to feeding tooth.So sewing function improves the efficiency of making operation.

The Sewing machines of technical scheme 10,11 comprises switching part, this switching part in the first state and can represent that is the thick large state of cloth of above-mentioned first state of above-mentioned cloth thickness rate switches between the second state, when above-mentioned switching part is in above-mentioned second state, said motor control part carries out drived control to above-mentioned work feed motor, and above-mentioned beginning when being in above-mentioned first state to make beginning period of the action of above-mentioned feeding table on above-mentioned carrying direction than above-mentioned switching part is postponed period.When the thick increase of cloth, operator is by being switched to the second state by switching part, and sewing function postpones beginning period automatically.Owing to making feeding tooth move upward when feeding table does not move up in carrying side, therefore, cloth is reliably clipped between presser feet and feeding tooth by function of sewing.Therefore, cloth thick larger time, feeding tooth also can not skid relative to cloth, sewing function reliably carry cloth.Therefore, function of sewing prevents the reduction of quality of sewing.The mechanism that operator regulates without the need to the driving mechanism of manual adjustments to feeding tooth.So sewing function improves the efficiency of making operation.

In the Sewing machines of technical scheme 12 ~ 14, when above-mentioned switching part is in the second state, said motor control part carries out drived control to above-mentioned work feed motor, and above-mentioned translational speed when being in the first state to make the translational speed of above-mentioned feeding table on above-mentioned carrying direction than above-mentioned switching part is fast.Make midway cloth is thick there occurs change time, Sewing machines also can make switching part switch before identical with the carrying amount of cloth afterwards.Therefore, cloth is thick there occurs change time, Sewing machines also can not change the interval (length of stitching) of making, and can maintain quality of sewing.

The Sewing machines of technical scheme 15,16 comprises the storage device storing multiple data, the scope that the plurality of data representation is thick with multiple cloth distinguishes at least one in corresponding above-mentioned beginning period and above-mentioned tail end, said motor control part is thick according to above-mentioned cloth, carries out drived control according to any one in the above-mentioned multiple data stored in above-mentioned storage device to above-mentioned work feed motor.Sewing function coordinates the movement locus of the cloth thick change feeding tooth of cloth.Therefore, function of sewing transfers cloth suitably according to cloth is thick.The mechanism that operator regulates without the need to the driving mechanism of manual adjustments to feeding tooth.So sewing function improves the efficiency of making operation.

The Sewing machines of technical scheme 17 comprises the calculating part calculating corresponding above-mentioned beginning period thick in the cloth of above-mentioned cloth and above-mentioned tail end, and at least one in the above-mentioned beginning period that said motor control part calculates according to above-mentioned calculating part and above-mentioned tail end carries out drived control to above-mentioned work feed motor.Sewing function is according to the movement locus of the cloth of cloth thick change feeding tooth.Therefore, function of sewing transfers cloth suitably according to cloth is thick, the mechanism that operator regulates without the need to the driving mechanism of manual adjustments to feeding tooth.So sewing function improves the efficiency of making operation.

Accompanying drawing explanation

Fig. 1 is the stereogram of Sewing machines 1.

Fig. 2 is the stereogram of the first state of cloth feeding mechanism 30.

Fig. 3 is the stereogram of the second state of cloth feeding mechanism 30.

Fig. 4 is the stereogram of the third state of cloth feeding mechanism 30.

Fig. 5 is the figure of the movement locus representing feeding tooth 34.

Fig. 6 is the figure of the inside of the left part in the horn portion 4 representing Sewing machines 1.

Fig. 7 utilizes presser feet 17 by the stereogram of the presser bar 63 of the state of compress 100.

Fig. 8 utilizes presser feet 17 by the front view of the presser bar 63 of the state of compress 100.

Fig. 9 is the front view of the presser bar 63 of the state that presser feet 17 contacts with needle plate 15.

Figure 10 is the block diagram of the electrical structure of Sewing machines 1.

Figure 11 is the data structure diagram of thin thing track data 80.

Figure 12 is the data structure diagram of thick thing track data 90.

Figure 13 is the figure of the corresponding relation representing upper shaft angle in the thin thing track data 80 of Figure 11 and the thick thing track data 90 of Figure 12 and work feed shaft angle.

Figure 14 is the figure representing thin thing track 802 and thick thing track 902.

Figure 15 is when representing that feeding tooth 34 moves along thin thing track 802, the figure of the position of the eedle 8 of tail end.

Figure 16 is when representing that feeding tooth 34 moves along thick thing track 902, the figure of the position of the eedle 8 of tail end.

Figure 17 is the flow chart of the first work feed process.

Figure 18 is the figure representing movement locus 95.

Figure 19 is the figure of the corresponding relation representing upper shaft angle in additional track data and work feed shaft angle.

Figure 20 is the flow chart of the second work feed process.

Figure 21 is the flow chart of the 3rd work feed process.

Figure 22 is the flow chart of the 4th work feed process.

Figure 23 is the figure representing movement locus 96.

Figure 24 is the figure representing movement locus 97.

Detailed description of the invention

Below, be described with reference to the Sewing machines 1 of accompanying drawing to the first embodiment of the present invention.On the upside of the paper of Fig. 1, downside, right side, left side, face side, rear side be the upside of Sewing machines 1, downside, right side, left side, front side, rear side respectively.Sewing machines 1 comprises base portion 2, uprights 3, horn portion 4.Base portion 2 is pedestals of Sewing machines 1.Base portion 2 is installed on the recess (not shown) of workbench 20 upper surface from top.Uprights 3 extends upward from base portion 2 right-hand member.Horn portion 4 extends from uprights 3 upper end towards left, and relative with base portion 2 upper surface.Horn portion 4 is provided with presser feet 17 and maintains shank 7 therein below its left part.Presser feet 17 is relative with feeding tooth 34 (with reference to Fig. 2).Shank 7 is provided with eedle 8 in its lower end.Shank 7 and eedle 8 move up and down along with the driving of main motor 13.Horn portion 4 comprises thread take-up tension lever 9 in its front, left part.Thread take-up tension lever 9 and shank 7 interlock and move up and down.Horn portion 4 comprises operating portion 10 at an upper portion thereof.Operating portion 10 has liquid crystal panel 11 at its front surface.Operator, while observe liquid crystal panel 11, operates operating portion 10, thus by various indicative input Sewing machines 1.

Sewing machines 1 comprises control device 25 at the lower surface of workbench 20.Control device 25 is connected with the pedal 22 stepping on formula by bar 21.Pedal 22 can operate towards both direction (rear side and front side) by operator.Control device 25, according to the direction of operating of pedal 22 and operational ton, controls the action of Sewing machines 1.Sewing machines 1 comprises knee lever 23 in the below of workbench 20.Operator makes presser bar 63 (with reference to Fig. 6) move up and down by carrying out operation to knee lever 23.Along with moving up and down of presser bar 63, presser feet 17 moves up and down.

Uprights 3 comprises main motor 13 on its right flank top.Horn portion 4 comprises main shaft 14 therein.Main shaft 14 extends in horn portion 4 in left-right direction with revolvable state.Main shaft 14 right-hand member is connected with main motor 13, and left end is connected with shank up-down mechanism (not shown).By main motor 13 driving main shaft 14, thus shank 7 and thread take-up tension lever 9 are moved up and down.

Base portion 2 thereon surperficial left end comprises needle plate 15, and needle plate 15 has needle falling hole 18 (with reference to Fig. 2) in its substantially central portion.Needle falling hole 18 is passed when declining in eedle 8 lower end.Needle plate 15 in needle falling hole 18 left, front, rear, right have the longer OBL feeding tooth hole of fore-and-aft direction 19 (with reference to Fig. 2) respectively.Base portion 2 comprises shuttle mechanism (not shown), cloth feeding mechanism 30 (with reference to Fig. 2 ~ Fig. 4) below needle plate 15.Cloth feeding mechanism 30 transfers the mechanism as the cloth making object.

With reference to Fig. 2, the structure of cloth feeding mechanism 30 is described.On the upside of the paper of Fig. 2, downside, right side, left side, upper left side, lower right side be the upside of Sewing machines 1, downside, front side, rear side, right side, left side respectively.Cloth feeding mechanism 30 comprises feeding table 33, feeding tooth 34, work feed motor 35, Poewr transmission mechanism 40, effect arm 38, up and down actuating unit 47 etc.

Feeding table 33 to be positioned at below needle plate 15 and almost parallel with needle plate 15.Feeding tooth 34 supports to approximate horizontal near centre of surface thereon by feeding table 33.Feeding tooth 34 is corresponding with the position in feeding tooth hole 19.Feeding tooth 34 fore-and-aft direction is longer, and the length of its fore-and-aft direction is less than the length in feeding tooth hole 19.Feeding tooth 34 has concavo-convex for what be clipped in by cloth between itself and presser feet 17 at an upper portion thereof.Feeding tooth 34 makes cloth move in the horizontal direction.

Work feed motor 35 is stepper motors, and it is located at feeding table 33 right.Work feed motor 35 makes feeding table 33 move along the longitudinal direction.Work feed motor 35 makes the driving shaft 36 extended towards left rotate.

Poewr transmission mechanism 40 comprises the first arm 41, second arm 42, connecting portion 65.First arm 41 extends along the direction orthogonal with the direction that driving shaft 36 extends.Driving shaft 36 is fixed in the lower end of the first arm 41.One end of the upper end of the first arm 41 and the second arm 42 connects into and can rotate by connecting portion 65.The rear end of the other end of the second arm 42 with effect arm 38 connects into and can rotate by connecting portion 66.Straight feeding axle 28 right-hand member is fixed in the leading section of effect arm 38.Effect arm 38 is orthogonal with the axis of straight feeding axle 28 and extend toward the rear side.Straight feeding axle 28 extends in left-right direction, and can be supported in base portion 2 rotationally.Link component 50 extends along the direction orthogonal with the direction that straight feeding axle 28 extends.The lower end of link component 50 is connected with the left end of straight feeding axle 28, and extends upward, and the upper end of link component 50 can be rotationally connected with the leading section of feeding table 33.

Driving shaft 36 in slewing area towards one direction rotate time and when rotating in the opposite direction, connecting portion 65 between anterior position and rear position along the longitudinal direction horizontal reciprocating move.Connecting portion 66 moves back and forth along the vertical direction between topmost and foot.Along with moving up and down of connecting portion 66, effect arm 38 rotates centered by straight feeding axle 28.Straight feeding axle 28 and the rotation interlock of effect arm 38 and rotate.Along with the rotation of straight feeding axle 28, feeding table 33 moves along the longitudinal direction between position, forefront and rearmost position.

Feeding table 33 rear end is located at by upper and lower actuating unit 47.Upper and lower actuating unit 47 comprises upper/lower feed shaft 27, belt wheel 24, eccentric part 39, link component 51.Upper/lower feed shaft 27 extends abreast in left-right direction with revolvable state and straight feeding axle 28, and can be supported in base portion 2 rotationally.Upper/lower feed shaft 27 is in its right part fixed pulley 24.Belt wheel 24 is connected with main shaft 14 via belt (not shown).Upper/lower feed shaft 27 is along with the driving of main motor 13 is to keep synchronous state to rotate with main shaft 14.Eccentric part 39 is located at upper/lower feed shaft 27 left end, and eccentric part 39 is eccentric relative to the axle center of upper/lower feed shaft 27.Link component 51 is rotatably located at feeding table 33 rear end, and eccentric part 39 is held in rotatable by link component 51.Eccentric part 39 makes feeding table 33 move up and down via link component 51 along with the rotation of upper/lower feed shaft 27.

To cloth feeding mechanism 30, the situation of feeding table 33 action is along the longitudinal direction described with reference to Fig. 2 ~ Fig. 4.Rotated towards a direction and opposite direction in slewing area by driving shaft 36, cloth feeding mechanism 30 repeats following first state ~ third state, thus feeding table 33 is moved in the longitudinal direction.W1 ~ the W3 of Fig. 2 ~ Fig. 4 represents near feeding table 33 respectively.

Fig. 2 represents the cloth feeding mechanism 30 of the first state.When cloth feeding mechanism 30 is in the first state, the first arm 41 and the second arm 42 located on a straight line in the vertical direction.Connecting portion 66 is positioned at topmost and is positioned at above connecting portion 65.Effect arm 38 is approximate horizontal.Feeding table 33 is positioned at forefront.The front end of feeding tooth 34 is positioned at the front end in feeding tooth hole 19.The position of the connecting portion 65 when the first arm 41 and the second arm 42 is located on a straight line is in the vertical direction called centre position.

When work feed motor 35 drives in a first state, driving shaft 36 rotates clockwise viewed from left surface time.First arm 41 rotates clockwise along with the rotation of driving shaft 36.Connecting portion 65 along with the rotation of the first arm 41 from centre position forward position move.First arm 41 and the second arm 42 bend to roughly L-shaped with connecting portion 65 forward for basic point.Second arm 42 centered by connecting portion 65 viewed from left surface time rotate counterclockwise.Along with the rotation of the second arm 42, connecting portion 66 moves downward.Along with the decline of connecting portion 66, the rear end of effect arm 38 is moved downward.Along with the decline of effect arm 38 rear end, effect arm 38 rotates counterclockwise centered by straight feeding axle 28.Straight feeding axle 28 and the rotation interlock of effect arm 38 and rotate counterclockwise.Link component 50 and straight feeding axle 28 interlock and rotate counterclockwise, feeding table 33 moves towards the rear.When driving shaft 36 turns to an end of rotatable scope, the rear end of feeding tooth 34 is positioned at the rear end in feeding tooth hole 19.Cloth feeding mechanism 30 becomes the second state (with reference to Fig. 3).

Work feed motor 35 makes the rotation direction of driving shaft 36 reverse.Rotate counterclockwise when driving shaft 36 is viewed from left surface.First arm 41 rotates counterclockwise along with the rotation of driving shaft 36.Connecting portion 65 moves towards centre position from anterior position along with the rotation of the first arm 41.First arm 41 and the second arm 42 located on a straight line in the vertical direction.Effect arm 38 rotates clockwise centered by straight feeding axle 28, gets back to approximate horizontal.Straight feeding axle 28 and the rotation interlock of effect arm 38 and rotate clockwise.Link component 50 and straight feeding axle 28 interlock and rotate clockwise, feeding table 33 moves forward.The front end of feeding tooth 34 is positioned at the front end in feeding tooth hole 19.Cloth feeding mechanism 30 gets back to the first state (with reference to Fig. 2).

Driving shaft 36 continues to rotate from the counter clockwise direction of the first state viewed from left surface time.First arm 41 is along with the lasting in the counterclockwise direction rotation of rotation of driving shaft 36.Connecting portion 65 from centre position towards the rear position move.First arm 41 and the second arm 42 bend to roughly L-shaped with connecting portion 65 towards the rear for basic point.That is, the first arm 41 and the second arm 42 are bending towards the direction contrary with during the second state.Second arm 42 rotates clockwise centered by connecting portion 65.Connecting portion 66 moves downward along with the rotation of the second arm 42.The rear end of effect arm 38 is moved downward along with the decline of connecting portion 66.Effect arm 38, along with the decline of effect arm 38 rear end, rotates counterclockwise centered by straight feeding axle 28.Straight feeding axle 28 and the rotation interlock of effect arm 38 and rotate counterclockwise.Link component 50 and straight feeding axle 28 interlock and rotate counterclockwise, feeding table 33 moves towards the rear.When driving shaft 36 turns to the other end of rotatable scope, the rear end of feeding tooth 34 is positioned at the rear end in feeding tooth hole 19.Cloth feeding mechanism 30 becomes the third state (with reference to Fig. 4).

Work feed motor 35 makes the rotation direction of driving shaft 36 reverse.Rotate clockwise when driving shaft 36 is viewed from left surface.First arm 41 rotates clockwise along with the rotation of driving shaft 36.Connecting portion 65 moves towards centre position from rear position along with the rotation of the first arm 41.First arm 41 and the second arm 42 located on a straight line in the vertical direction.Effect arm 38 rotates clockwise centered by straight feeding axle 28, gets back to approximate horizontal.Straight feeding axle 28 and the rotation interlock of effect arm 38 and rotate clockwise.Link component 50 and straight feeding axle 28 interlock and rotate clockwise, feeding table 33 moves to forefront.The front end of feeding tooth 34 is positioned at the front end in feeding tooth hole 19.Cloth feeding mechanism 30 gets back to the first state (with reference to Fig. 2).Cloth feeding mechanism 30 carries out action from the side the first state ~ third state to the opposing party, thus feeding table 33 is moved in the longitudinal direction.

With reference to Fig. 5, the action that cloth is transferred by cloth feeding mechanism 30 is towards the rear described.Cloth feeding mechanism 30 is by repetition the first state ~ third state and feeding table 30 is moved up and down, thus transfers cloth.When cloth feeding mechanism 30 is in the first state (with reference to Fig. 2), the top of feeding tooth 34 is positioned at the position 341 roughly consistent with the upper surface of needle plate 15.

When main motor 13 drives, eccentric part 39 and link component 51 make feeding table 33 move upward.Feeding tooth 34 is given prominence to upward from the upper surface of needle plate 15.Work feed motor 35 rotates clockwise when making driving shaft 36 viewed from left surface.Poewr transmission mechanism 40 makes feeding table 33 move towards the rear, and feeding tooth 34 is by position 342.Therefore, cloth is transferred by cloth feeding mechanism 30 towards the rear.

When main motor 13 continues to drive, eccentric part 39 and link component 51 make feeding table 33 move downward, and feeding tooth 34 moves to the position 343 roughly consistent with the upper surface of needle plate 15.When the driving shaft 36 of work feed motor 35 rotates clockwise an end of slewing area, cloth feeding mechanism 30 becomes the second state (with reference to Fig. 3).Cloth feeding mechanism 30 stops the transfer to cloth.

Eccentric part 39 and link component 51 make feeding table 33 move downward further.Feeding tooth 34 declines downward from the upper surface of needle plate 15.Work feed motor 35 makes the rotation direction of driving shaft 36 reverse, and rotates counterclockwise when making it viewed from left surface.Poewr transmission mechanism 40 makes feeding table 33 move forward, and feeding tooth 34 is by position 344.Because the upper surface of feeding tooth 34 from needle plate 15 declines downward, therefore, cloth feeding mechanism 30 does not transfer cloth.

When main motor 13 continues to drive, eccentric part 39 and link component 51 make feeding table 33 move upward, and feeding tooth 34 turns back to the position 341 roughly consistent with the upper surface of needle plate 15.Owing to rotating counterclockwise when work feed motor 35 makes driving shaft 36 viewed from left surface, therefore, cloth feeding mechanism 30 turns back to the first state (with reference to Fig. 2).Cloth feeding mechanism 30 repeats above-mentioned action, is transferred towards the rear by cloth.

Illustrate the thick mechanism detected of the cloth of the cloth being configured at base portion 2 with reference to Fig. 6 ~ Fig. 9.The left part in horn portion 4 is provided with presser bar 63, spring 71, thread clamping mechanism (not shown), presser foot drive (not shown) etc. therein.Presser bar 63 extends along the vertical direction in horn portion 4, and its lower end is given prominence to downward from lower end, horn portion 4.Presser bar 63 is provided with presser feet 17 in its lower end.Presser bar 63 descends the central portion in direction to have presser feet bar cramp 59 thereon.Presser bar 63 is provided with spring 71 in the upside of presser feet bar cramp 59.Knob 74 is located at the upper end in horn portion 4 and is abutted with the upper end of spring 71.Spring 71 pairs of presser feet bar cramps 59 exert a force downward.Presser foot drive is connected with knee lever 23 (with reference to Fig. 1).When knee lever 23 presses towards right by operator, presser foot drive makes presser feet bar cramp 59 move upward, and presser feet 17 rises.When operator stops knee lever 23 to press towards right, presser feet bar cramp 59 presses by spring 71 downward, and therefore, the presser feet 17 being installed on presser bar 63 declines.The cloth be configured on needle plate 15 presses by presser feet 17 downward (with reference to Fig. 8).

Presser feet bar cramp 59 is provided with tabular position 591 at its left surface.Tabular position 591 is provided with magnet 592 in its bottom, left surface.Horn portion 4 is provided with the electric base 72 relative with the left surface at tabular position 591.Electric base 72 is fixed on the installing plate 401 (with reference to Fig. 6) of horn portion 4 left end.Electric base 72 is separated from one another with tabular position 591.Electric base 72 is provided with Hall element 73 on its right surface.Hall element 73 is connected with CPU44 (with reference to Figure 10) via drive circuit 56, I/O interface (hereinafter referred to as I/O) 48.

Hall element 73 can detect the magnetic field of magnet 592.The upper-lower position (lifting position) of magnet 592 along with the upper-lower position (lifting position) of presser feet 17 and presser bar 63 change and change.Magnetic field detected by Hall element 73 changes along with the change of the upper-lower position of magnet 592.Therefore, the output voltage change of Hall element 73.CPU44 detects the upper-lower position of presser feet 17 according to the change of the output voltage of Hall element 73.The a reference value of the thick detection of pre-set cloth is stored in ROM45 or storage device 49.A reference value is the output voltage of the Hall element 73 of presser feet 17 when abutting with needle plate 15.CPU44 compares the output voltage of the Hall element 73 of (with reference to Fig. 8) under the state be clipped in by cloth 100 between needle plate 15 and presser feet 17 and a reference value, thus detects the upper-lower position of presser feet 17.CPU44, according to the upper-lower position of presser feet 17, detects that the cloth of the cloth 100 between presser feet 17 and needle plate 15 is thick.

With reference to Figure 10, the electrical structure of Sewing machines 1 is described.The control device 25 of Sewing machines 1 comprises CPU44.CPU44 administers the control of Sewing machines 1.CPU44 is connected with ROM45, RAM46, storage device 49, I/O48 by bus.ROM45 stores the program etc. for performing various work feed process.Various values needed for performing a programme store by RAM46 temporarily.Storage device 49 is Nonvolatile memory devices, stores the data such as thin thing track data 80, thick thing track data 90.

I/O48 is connected with pedal 22, operating portion 10.CPU44 obtains direction of operating and the operational ton of pedal 22.CPU44 obtains from operating portion 10 operation instruction that operator inputs.Operator confirms liquid crystal panel 11 while operate operating portion 10.I/O48 is connected with drive circuit 52,53,56.

Drive circuit 52 drives liquid crystal panel 11.Drive circuit 53 drives main motor 13 according to the torque instruction signal that CPU44 inputs.Sewing machines 1 comprises the anglec of rotation phase place (hereinafter referred to as upper shaft angle) of the driving shaft (not shown) for detecting main motor 13 and the main encoder 57 of rotary speed.The upper shaft angle of main motor 13 and the testing result of rotary speed are outputted to CPU44 via I/O48 by main encoder 57.

The work feed drive singal that drive circuit 54 inputs according to CPU44 drives work feed motor 35.The rotation of CPU44 to the driving shaft 36 of work feed motor 35 controls, and changes the movement locus of feeding tooth 34.Work feed motor 35 is impulse motors.The work feed drive singal of work feed motor 35 is pulse signals.Sewing machines 1 comprises the work feed encoder 58 of anglec of rotation phase place (hereinafter referred to as work feed shaft angle) for detecting work feed motor 35 and rotary speed.The work feed shaft angle of work feed motor 35 and the testing result of rotary speed are outputted to CPU44 via I/O48 by work feed encoder 58.Drive circuit 56 drives Hall element 73.Drive circuit 56 makes the output voltage amplification etc. of Hall element 73, and is outputted to CPU44 via I/O48.

With reference to Figure 11, Figure 13, Figure 14, the movement locus of thin thing track data 80 and feeding tooth 34 is described.Thin thing track data 80 is the data for the thick less cloth 100 (the thick cloth 100 below aftermentioned threshold value of cloth) of sewing fabric.As shown in figure 11, thin thing track data 80 is the data making the upper shaft angle of main motor 13 corresponding with the work feed shaft angle of work feed motor 35.The upper shaft angle of thin thing track data 80 and the corresponding relation of work feed shaft angle are as shown in the dotted line 801 of Figure 13.CPU44 controls main motor 13 and work feed motor 35, makes shaft angle and work feed shaft angle meet the corresponding relation shown in thin thing track data 80.That is, CPU44 carries out drived control based on thin thing track data 80 to main motor 13 and work feed motor 35, and feeding tooth 34 is moved along the thin thing track 802 shown in Figure 14.

As shown in figure 13, the work feed shaft angle of work feed motor 35 is in the scope of-30 ° ~ 30 °.That is, the slewing area of driving shaft 36 is-30 ° ~ 30 °.When work feed shaft angle is 0 °, cloth feeding mechanism 30 is in the first state (Fig. 2).When upper shaft angle During within the scope of 0 ° ~ 720 °, work feed shaft angle makes a round trip between-30 ° ~ 30 °.That is, when the driving shaft of main motor 13 rotates two weeks, driving shaft 36 reciprocating rotation of work feed motor 35 once.During this period, cloth 100 is carried twice by feeding tooth 34.Eedle 8, when main motor 13 rotates a circle, carries out making of a pin.Lower limit and the higher limit of slewing area-30 ° ~ 30 of driving shaft 36 ° are variable pro rata with the carrying amount of cloth 100 (the distance L of Figure 14) respectively.

When the corresponding relation of upper shaft angle and work feed shaft angle is symbol 802A, 802B, 802C, the 802D (with reference to Figure 13) on dotted line 801, feeding tooth 34 lays respectively at position 802A, 802B, 802C, 802D (with reference to Figure 14) on thin thing track 802.CPU44 controls main motor 13 and work feed motor 35 in the mode changing to symbol 802B from the symbol 802A on dotted line 801, thus feeding tooth 34 is moved forward in the downside of needle plate 15 (arrow 803 of Figure 14).Top due to feeding tooth 34 is positioned at the downside of needle plate 15, and therefore, feeding tooth 34 does not contact with cloth 100.So feeding tooth 34 does not transfer cloth 100.

CPU44 controls main motor 13 and work feed motor 35 in the mode changing to symbol 802C from the symbol 802B on dotted line 801, thus feeding tooth 34 is moved towards the rear in the upside of needle plate 15 (arrow 804 of Figure 14).Top due to feeding tooth 34 is positioned at the upside of needle plate 15, and therefore, feeding tooth 34 contacts with the cloth 100 on needle plate 15.So cloth 100 is transferred by feeding tooth 34 towards the rear.CPU44 controls main motor 13 and work feed motor 35 in the mode changing to symbol 802D from the symbol 802C on dotted line 801, thus feeding tooth 34 is moved towards the direction of arrow 803.CPU44 controls main motor 13 and work feed motor 35 in the mode changing to symbol 802A from the symbol 802D on dotted line 801, thus feeding tooth 34 is moved towards the direction of arrow 804.So cloth 100 is transferred by feeding tooth 34 towards the rear.

With reference to Figure 12 ~ Figure 14, the movement locus of thick thing track data 90 and feeding tooth 34 is described.Thick thing track data 90 is the data for the thick larger cloth 100 (the thick cloth 100 more than aftermentioned threshold value of cloth) of sewing fabric.As shown in figure 12, thick thing track data 90 is the data making the upper shaft angle of main motor 13 corresponding with the work feed shaft angle of work feed motor 35.The upper shaft angle of thick thing track data 90 and the corresponding relation of work feed shaft angle are as shown in the solid line 901 of Figure 13.CPU44 carries out drived control to main motor 13 and work feed motor 35, makes shaft angle and work feed shaft angle meet the solid line 901 shown in thick thing track data 90.That is, CPU44 carries out drived control based on thick thing track data 90 to main motor 13 and work feed motor 35, and feeding tooth 34 is moved along the thick thing track 902 shown in Figure 14.

As shown in figure 13, between symbol 902L and the 902B on solid line 901, between symbol 902C and 902E, between symbol 902F and 902H, between symbol 902I and 902K, work feed shaft angle constantization.That is, driving shaft 36 stops.When the corresponding relation of upper shaft angle and work feed shaft angle is the symbol 902A ~ 902L (with reference to Figure 13) on solid line 901, feeding tooth 34 lays respectively at the position 902A ~ 902L (with reference to Figure 14) on thick thing track 902.

CPU44 controls main motor 13 and work feed motor 35 in the mode changing to symbol 902B from the symbol 902A on solid line 901, thus feeding tooth 34 is moved downward in the downside of needle plate 15.Because CPU44 makes work feed motor 35 stop, therefore, feeding tooth 34 does not move in the longitudinal direction.When CPU44 controls main motor 13 and work feed motor 35 in the mode changing to symbol 902C from the symbol 902B on solid line 901, feeding tooth 34 moves forward in the downside of needle plate 15 (arrow 903 of Figure 14).Top due to feeding tooth 34 is positioned at the downside of needle plate 15, and therefore, feeding tooth 34 does not contact with cloth 100.So feeding tooth 34 does not transfer cloth 100.

When CPU44 controls main motor 13 and work feed motor 35 according to the order of the symbol 902C on solid line 901, symbol 902D, symbol 902E, feeding tooth 34 moves upward from the downside of needle plate 15.Because CPU44 makes work feed motor 35 stop, therefore, feeding tooth 34 does not move in the longitudinal direction.When CPU44 controls main motor 13 and work feed motor 35 in the mode changing to symbol 902F from the symbol 902E on solid line 901, feeding tooth 34 moves towards the rear in the upside of needle plate 15 (arrow 904 of Figure 14).Top due to feeding tooth 34 is positioned at the upside of needle plate 15, and therefore, feeding tooth 34 contacts with the cloth 100 on needle plate 15.So cloth 100 is transferred by feeding tooth 34 towards the rear.

When CPU44 controls main motor 13 and work feed motor 35 in the mode changing to symbol 902G from the symbol 902F on solid line 901, feeding tooth 34 moves downward.Because CPU44 makes work feed motor 35 stop, therefore, feeding tooth 34 does not move in the longitudinal direction.When CPU44 controls main motor 13 and work feed motor 35 in the mode changed according to the order of symbol 902G, 902H, 902I, 902J, 902K, 902L, 902A, feeding tooth 34 carries out driving (with reference to Figure 14) according to the movement locus identical with when changing to position 902G from position 902A.

The beginning period (hereinafter referred to as starting period) that feeding tooth 34 carries the action of cloth 100 is different in thin thing track 802 and thick thing track 902.Beginning when feeding tooth 34 moves along thin thing track 802 is that feeding tooth 34 is when being positioned at position 802B, 802D period.That is, this starts to be that feeding tooth 34 rises and the position on feeding tooth 34 top arrives period of the position identical with needle plate 15 upper surface period.Beginning when feeding tooth 34 moves along thick thing track 902 is that feeding tooth 34 is when being positioned at position 902E, 902K period.That is, this start period be feeding tooth 34 rise and feeding tooth 34 top compared with needle plate 15 upper surface period that side is outstanding upward.As shown in figure 13, upper shaft angle when upper shaft angle when feeding tooth 34 is positioned at position 902E, 902K is positioned at position 802B, 802D than feeding tooth 34 is respectively large.That is, beginning when beginning when feeding tooth 34 moves along thick thing track 902 is moved along thin thing track 802 than feeding tooth 34 period is late for period.

The tail end (hereinafter referred to as tail end) that feeding tooth 34 carries the action of cloth 100 is different in thin thing track 802 and thick thing track 902.Tail end when feeding tooth 34 moves along thin thing track 802 is that feeding tooth 34 is when being positioned at position 802A, 802C.That is, this tail end is that feeding tooth 34 declines and the top of feeding tooth 34 arrives period of the position identical with needle plate 15 upper surface.Tail end when feeding tooth 34 moves along thick thing track 902 is that feeding tooth 34 is when being positioned at position 902F, 902L.That is, this tail end be the top of feeding tooth 34 be positioned at upside compared with the upper surface of needle plate 15 and feeding tooth 34 towards mobile period stopped in carrying direction.As shown in figure 13, upper shaft angle when upper shaft angle when feeding tooth 34 is positioned at position 902F, 902L is positioned at position 802A, 802C than feeding tooth 34 is respectively little.That is, tail end when tail end when feeding tooth 34 moves along thick thing track 902 moves along thin thing track 802 than feeding tooth 34 is Zao.

The rotary speed making feeding tooth 34 driving shaft of the main motor 13 of movement is along the vertical direction identical in thin thing track 802 and thick thing track 902.Therefore, feeding tooth 34 is identical at position 802A, 802C of thin thing track 802 and the time of movement between position 802B, 802D and feeding tooth 34 at position 902A, 902G of thick thing track 902 and the time of movement between position 902D, 902J.Feeding tooth 34 makes a round trip in the longitudinal direction and the distance L carrying cloth 100 is identical in thin thing track 802 and thick thing track 902.Beginning when beginning when feeding tooth 34 moves along thick thing track 902 is moved along thin thing track 802 than feeding tooth 34 period is late for period.Tail end when tail end when feeding tooth 34 moves along thick thing track 902 moves along thin thing track 802 than feeding tooth 34 is Zao.Therefore, when feeding tooth 34 moves along thick thing track 902, compared with when moving along thin thing track 802, displacement L at short notice.Therefore, when making cloth 100 displacement L, translational speed when feeding tooth 34 moves along thick thing track 902 is faster than translational speed when moving along thin thing track 802.

When moving along thin thing track 802 feeding tooth 34 with reference to Figure 15 and Figure 16 and when moving along thick thing track 902, eedle 8 and cloth 100 position relationship etc. is described.Eedle 8 moves up and down along with the driving of main motor 13.When feeding tooth 34 transfers cloth 100 towards the rear, eedle 8 declines downward from top.The position of eedle 8 when Figure 15 represents that feeding tooth 34 moves along thin thing track 802, tail end.When the upper surface of cloth 100 is positioned at height and position 100A when less (cloth thick), 8A height position, the front end 100A of eedle 8 is positioned at top.That is, when feeding tooth 34 terminates the carrying of cloth 100, eedle 8 does not thrust cloth 100.Therefore, Sewing machines 1 can normally be made.

When the upper surface of cloth 100 is positioned at height and position 100B when larger (cloth thick), 8A height position, the front end 100B of eedle 8 is positioned at below.That is, before feeding tooth 34 carries the release of cloth 100 along thin thing track 802, eedle 8 thrusts cloth 100.If cloth 100 moves under eedle 8 thrusts state wherein, then eedle 8 can bend, and quality of sewing may be caused to reduce.Bending eedle 8 may contact with needle plate 15 and damaged.Therefore, the Sewing machines 1 of present embodiment, when cloth 100 is thicker, uses thick thing track data 90 pairs of cloth 100 to transfer.

The position of eedle 8 when Figure 16 represents that feeding tooth 34 moves along thick thing track 902, tail end.Tail end when tail end when feeding tooth 34 moves along thick thing track 902 moves along thin thing track 802 than feeding tooth 34 is Zao.The position of the eedle 8 of tail end when feeding tooth 34 moves along thick thing track 902 is positioned at high position, the position (with reference to Figure 15) of the eedle 8 of tail end when moving along thin thing track 802 than feeding tooth 34.Therefore, when the upper surface of cloth 100 is positioned at height and position 100B, eedle 8 also can not thrust cloth 100.Because Sewing machines 1 can prevent eedle 8 before the mobile end of cloth 100 from thrusting cloth 100, therefore, the reduction of quality of sewing can be prevented.Sewing machines 1 can prevent the generation of bending, the bending of eedle 8.

With reference to Figure 17, the first work feed process is described.First work feed process is the process of Sewing machines 1 according to the movement locus of cloth thick change feeding tooth 34.When the power supply of Sewing machines 1 is connected, CPU44 starts the first work feed process.CPU44 sets the threshold value (S11) of the upper-lower position of presser feet 17.That is, Sewing machines 1 sets the thick threshold value of cloth.The threshold value that CPU44 can use storage device 49 to prestore, the threshold value that also operator can be used to specify.Threshold value is such as 5mm.

CPU44 obtains the upper shaft angle (S12) that main encoder 57 exports.The output voltage of the Hall element 73 that CPU44 exports according to drive circuit 56 obtains the height (S13) of presser feet 17.That is, the cloth of CPU44 acquisition cloth 100 is thick.CPU44 judges that the cloth obtained in S13 is thick and whether is in more than the threshold value set in S11 (S14).When cloth thick not large than threshold value time (S14: no), CPU44 obtains the work feed shaft angle (S15) corresponding with the upper shaft angle obtained in S12 from thin thing track data 80.Such as, when the upper shaft angle obtained in S12 is 1 °, it is 15.226 ° that CPU44 obtains work feed shaft angle.CPU44 controls work feed motor 35, makes driving shaft 36 rotate to be formed in the work feed shaft angle (S17) obtained in S15.

In CPU44 judgement, whether shaft angle there occurs change (S18).CPU44, by monitoring the upper shaft angle that main encoder 57 exports, carries out the judgement of S18.When upper shaft angle does not change (S18: no), CPU44 repeats the process of S18.When upper shaft angle there occurs change (S18: yes), CPU44 makes process turn back to S12.

Cloth is thick be in below threshold value time, if Sewing machines 1 continues to make, then CPU44 repeat S12 ~ S15, S17, S18 process.That is, CPU44 drives according to thin thing track data 80 pairs of feeding teeth 34.Therefore, feeding tooth 34 moves along thin thing track 802.

Sometimes the thick meeting of cloth changes and reaches more than threshold value.When cloth is thick reach more than threshold value time, CPU44 judges that in S14 cloth is thick and is in more than threshold value.When cloth is thick be in more than threshold value time (S14: yes), CPU44 obtains the work feed shaft angle (S16) corresponding with the upper shaft angle obtained in S12 from thick thing track data 90.Such as, when the upper shaft angle obtained in S12 is 1 °, it is 11.480 ° that CPU44 obtains work feed shaft angle.CPU44 controls work feed motor 35, makes driving shaft 36 rotate to be formed in the work feed shaft angle (S17) obtained in S16.

Cloth is thick be in more than threshold value time, if Sewing machines 1 continues to make, then CPU44 repeat S12 ~ S14, S16 ~ S18.That is, CPU44 drives according to thick thing track data 90 pairs of feeding teeth 34.Therefore, feeding tooth 34 moves along thick thing track 902.First work feed process terminates when the power supply of Sewing machines 1 disconnects.

As mentioned above, CPU44 carries out the first work feed process.In the present embodiment, when cloth thick not large than threshold value time (S14: no), CPU44 drives feeding tooth 34 according to thin thing track data 80.When cloth is thick be in more than threshold value time (S14: yes), CPU44 drives feeding tooth 34 (S16, S17) according to thick thing track data 90.When cloth is thick be in more than threshold value time (S14: yes), CPU44 with tail end thick compared with cloth large less than threshold value time tail end mode early drived control is carried out to work feed motor 35.Therefore, cloth is thick be in more than threshold value time, tail end can be done sth. in advance by Sewing machines 1 automatically.Therefore, operator makes action to carry out the adjustment of tail end without the need to what stop Sewing machines 1.Therefore, Sewing machines 1 can improve the efficiency of making operation of operator.

Cloth 100 cloth thick larger time than thick large compared with elastic force time little at cloth, weight is also heavier.When feeding tooth 34 and presser feet 17 do not clamp cloth 100 securely, feeding tooth 34 may skid relative to cloth 100, and cannot normally carry cloth 100.Therefore, Sewing machines 1 needs cloth 100 to be clipped in securely between feeding tooth 34 and presser feet 17.

In the present embodiment, when cloth is thick be in more than threshold value time (S14: yes), CPU44 with beginning period thick compared with cloth large less than threshold value time the mode in beginning evening in period drived control is carried out to work feed motor 35.When cloth is thick be in more than threshold value time, feeding tooth 34, from after position 902D, 902J of Figure 14 move to 902E, 902K, moves towards the direction shown in arrow 904.That is, after feeding tooth 34 moves to the upside of needle plate 15 upper surface at an upper portion thereof, move towards the rear.Because feeding tooth 34 moves to top, therefore, cloth 100 can reliably be clipped between itself and presser feet 17 by feeding tooth 34.That is, cloth 100 can be reliably clipped in the carrying starting cloth 100 under the state between itself and presser feet 17 by feeding tooth 34.Therefore, feeding tooth 34 can not skid by larger cloth 100 thick in cloth, can reliably carry cloth 100.Therefore, Sewing machines 1 can prevent the reduction of quality of sewing.Cloth is thick be in more than threshold value time, Sewing machines 1 can postpone beginning period automatically.Therefore, the mechanism that regulates without the need to the driving mechanism of manual adjustments to feeding tooth 34 of operator.Therefore, Sewing machines 1 can improve the efficiency of making operation of operator.

Cloth thick larger time eedle 8 from the period that cloth 100 is extracted thick compared with cloth less time evening in period of extracting.If feeding tooth 34 pairs of cloth 100 are carried before eedle 8 is extracted from cloth 100, then quality of sewing may reduce, and eedle 8 may be damaged.

In the present embodiment, when the cloth of cloth 100 is thick be in more than threshold value time, CPU44 postpones beginning period.Because Sewing machines 1 is carried cloth 100 after eedle 8 is extracted really from cloth 100, therefore, the reduction of quality of sewing can be prevented.Sewing machines 1 can prevent the generation of bending, the bending of eedle 8.

When cloth is thick be in more than threshold value time (S15: yes), CPU44 with the speed of feeding tooth 34 movement towards the rear thick compared with cloth large less than threshold value time fireballing mode drived control is carried out to work feed motor 35.CPU44, by accelerating the translational speed of feeding tooth 34, can make the carrying amount (the distance L of Figure 14) of the cloth 100 before and after the thick change of cloth identical.Therefore, when the thick change of cloth, Sewing machines 1 also can not change the interval (length of stitching) of making, and can maintain quality of sewing.

In the present embodiment, CPU44 carries out drived control in the mode changing beginning period and tail end etc. to work feed motor 35, thus changes the movement locus of feeding tooth 34.Therefore, the mechanism that operator regulates without the driving mechanism of manual adjustments to feeding tooth 34, Sewing machines 1 just can change the movement locus of feeding tooth 34.Therefore, Sewing machines 1 can cut down the time of the movement locus changing feeding tooth 34, can improve the efficiency of making operation.

The CPU44 of the first embodiment switches between two kinds of movement locus (thin thing track 802 and thick thing track 902) according to a threshold value.But, CPU44 also can according to multiple threshold value (plural threshold value) motion switch track.Below, be described according to the variation of two threshold value motion switch tracks i.e. the second embodiment.In the Sewing machines 1 of the second embodiment, when carrying cloth thickness rate feeding tooth 34 and driving along thick thing track 902 during the thick large cloth 100 of the cloth of carrying, feeding tooth 34 moves along the movement locus 95 shown in Figure 18.Identical with thick thing track data 90 with thin thing track data 80, storage device 49 stores for making feeding tooth 34 along the data (not shown, hereinafter referred to as additional track data) of the movement locus of movement locus 95 movement.The additional upper shaft angle of track data and the corresponding relation of work feed shaft angle are as shown in the chain-dotted line 951 of Figure 19.The mode that more than CPU44 shaft angle and work feed shaft angle meet the corresponding relation of chain-dotted line 951 controls main motor 13 and work feed motor 35.That is, CPU44 carries out drived control based on the corresponding relation of chain-dotted line 951 to main motor 13 and work feed motor 35, and feeding tooth is moved along the movement locus 95 shown in Figure 18.As shown in figure 19, the beginning period (902B, 902E, 902H, 902K) when the beginning period (95B, 95E, 95H, 95K) when feeding tooth 34 moves along movement locus 95 is more mobile along thick thing track 902 (with reference to Figure 14) than feeding tooth 34 is late.Tail end (902C, 902F, 902I, 902L) when tail end (95C, 95F, 95I, 95L) when feeding tooth 34 moves along movement locus 95 moves along thick thing track 902 than feeding tooth 34 is early.The speed when speed of carrying cloth 100 moves along thick thing track 902 than feeding tooth 34 when feeding tooth 34 moves along movement locus 95 is fast.

With reference to Figure 20, the second work feed process is described.Second work feed process is the process of carrying cloth 100 according to two threshold value motion switch tracks.In the following description, also the description thereof will be omitted to represent the process identical with the first work feed process (with reference to Figure 17) with identical symbol.

When the power supply of Sewing machines 1 is connected, CPU44 starts the second work feed process.CPU44 sets first threshold and Second Threshold (S21).The establishing method of threshold value is identical with the S11 of the first work feed process.Second Threshold is larger than first threshold.CPU44 carries out the process of S12 and S13.CPU44 judges that the cloth obtained in S13 is thick and whether is in more than the first threshold set in S21 (S22).When cloth thick not large than first threshold time (S22: no), in the same manner as the first work feed process, CPU44 carries out the process of S15, S17, S18.CPU44 makes feeding tooth 34 mobile along thin thing track 802 (with reference to Figure 14).When cloth is thick be in more than first threshold time (S22: yes), CPU44 judges that the cloth obtained in S13 is thick and whether is in more than the Second Threshold set in S21 (S23).When cloth thick not large than Second Threshold time (S23: no), in the same manner as the first work feed process, CPU44 carries out the process of S16 ~ S18.CPU44 makes feeding tooth 34 mobile along thick thing track 902 (with reference to Figure 14).

When cloth is thick be in more than Second Threshold time (S23: yes), CPU44 obtains work feed shaft angle (S24) from additional track data (not shown).CPU44 controls work feed motor 35, makes driving shaft 36 rotate to be formed in the work feed shaft angle (S17) obtained in S24.CPU44 drives feeding tooth 34 according to movement locus 95 (with reference to Figure 18).Second work feed process terminates when the power supply of Sewing machines 1 disconnects.

As mentioned above, CPU44 carries out the second work feed process.In the present embodiment, CPU44 can coordinate the thick movement locus changing feeding tooth 34 step by step of the cloth of cloth 100.That is, CPU44 can carry out drived control in the mode changing beginning period and tail end according to multiple threshold value to work feed motor 35.Therefore, Sewing machines 1 can transfer cloth 100 suitably according to cloth is thick, can prevent the reduction of quality of sewing.

Below the 3rd embodiment is described.In the first embodiment, Sewing machines 1 detects that the cloth of cloth 100 is thick and the movement locus of the feeding tooth 34 that automatically switches.In the third embodiment, Sewing machines 1 comprises change-over switch (not shown).Change-over switch is the switch for motion switch track between thin thing track 802 and thick thing track 902.Operator is by operating change-over switch, and Sewing machines 1 switches the movement locus of feeding tooth 34.In the third embodiment, operating portion 10 comprises change-over switch.Operator switches between thick thing setting and thin thing set by operation change-over switch.Thick thing with setting be represent to set with thin thing compared with the setting of the thick larger state of cloth.Operator be judged as the cloth of cloth 100 thick little time, change-over switch is switched to thin thing setting.Operator be judged as the cloth of cloth 100 thick larger time, change-over switch is switched to thick thing setting.

With reference to Figure 21, the 3rd work feed process is described.In the 3rd work feed process, the movement locus that Sewing machines 1 makes feeding tooth 34 be selected along operator by change-over switch moves, and transfers cloth 100.In the following description, also the description thereof will be omitted to represent the process identical with the first work feed process with identical symbol.

When the power supply of Sewing machines 1 is connected, CPU44 starts the 3rd work feed process.Shaft angle (S12) in CPU44 acquisition.CPU44 judges whether the change-over switch of operating portion 10 is thick things setting (S31).When change-over switch is not the setting of thick thing (S31: no), CPU44 is judged as that change-over switch is in thin thing setting (S31: no).CPU44 carries out the process of S15, S17, S18.When upper shaft angle change (S18: yes), CPU44 makes process turn back to S12.When change-over switch is the setting of thin thing, CPU44 drives feeding tooth 34 (S15 and S17) according to thin thing track data 80 with thin thing track 802.

When change-over switch is the setting of thick thing (S31: yes), CPU44 carries out the process of S16, S17, S18.That is, when change-over switch is the setting of thick thing, CPU44 uses thick thing track data 90 (with reference to Figure 12), drives feeding tooth 34 (S16) with thick thing track 902 (with reference to Figure 14).3rd work feed process terminates when the power supply of Sewing machines 1 disconnects.

As mentioned above, CPU44 carries out the 3rd work feed process.In the present embodiment, when the thick change of cloth of cloth 100 is large, change-over switch is switched to the setting of thick thing from thin thing setting by operator.The movement locus of feeding tooth 34 is switched to thick thing track 902 (with reference to Figure 14) from thin thing track 802 automatically.Therefore, with change-over switch be thin thing set time compared with, the tail end of feeding tooth 34 is done sth. in advance automatically.Therefore, identical with the first embodiment, Sewing machines 1 can prevent eedle 8 before the mobile end of cloth 100 from thrusting cloth 100, can prevent the reduction of quality of sewing.Sewing machines 1 can prevent the generation of bending, the bending of eedle 8.Operator makes action to carry out the adjustment of tail end without the need to what stop Sewing machines 1.Therefore, Sewing machines 1 can improve the efficiency of making operation of operator.

When change-over switch is switched to the setting of thick thing from thin thing setting by operator, compared with when setting with thin thing, the beginning of feeding tooth 34 is postponed period automatically.Therefore, identical with the first embodiment, when the cloth of cloth 100 thick larger time, Sewing machines 1 also can reliably carry cloth 100.Therefore, Sewing machines 1 can prevent the reduction of quality of sewing.The mechanism that operator regulates without the need to the driving mechanism of manual adjustments to feeding tooth 34.Therefore, Sewing machines 1 can improve the efficiency of making operation of operator.

When change-over switch is switched to the setting of thick thing from thin thing setting by operator, compared with when setting with thin thing, the speed that feeding tooth 34 (transfers the direction of cloth 100) is towards the rear accelerated.Therefore, identical with the first embodiment, Sewing machines 1, before and after the thick change of cloth, can make the carrying amount of cloth 100 (the distance L of Figure 14) identical.Therefore, when the thick change of cloth, Sewing machines 1 also can not change the interval (length of stitching) of making, and can maintain quality of sewing.

In the first embodiment ~ the 3rd embodiment, CPU44 changes the movement locus of feeding tooth 34 by the data switching the movement locus used, but such as CPU44 also can use the mathematical expression calculated work feed shaft angle, change the movement locus of feeding tooth 34.Below, the 4th embodiment is described.

In the 4th embodiment, CPU44 uses following formula (1) ~ formula (10) to change movement locus.In formula (1) ~ formula (10), represent work feed shaft angle with M, represent upper shaft angle with N, represent that the cloth of cloth 100 is thick with Z.Formula (1) ~ formula (10) is stored in ROM45.

α＝12×Z (1)

M＝30×SIN(-60+(N-(-60+(α/2))×180/(180-α)+60)/2)° (2)

M＝30 (3)

M＝30×SIN(120+(N-(120+(α/2))×180/(180-α)+60)/2)° (4)

M＝0 (5)

M＝30×SIN(300+(N-(300+(α/2))×180/(180-α)+60)/2)° (6)

M＝-30 (7)

M＝30×SIN(480+(N-(480+(α/2))×180/(180-α)+60)/2)° (8)

M＝0 (9)

M＝30×SIN(660+(N-(660+(α/2))×180/(180-α)+60)/2)° (10)

CPU44 uses above-mentioned formula (2) ~ formula (10) respectively when upper shaft angle N is in following scope.

N is 0 ° ~ (120-α/2) ° time, CPU44 uses formula (2).

When N is (120-α/2) ° ~ (120+ α/2) °, CPU44 uses formula (3).

When N is (120+ α/2) ° ~ (300-α/2) °, CPU44 uses formula (4).

When N is (300-α/2) ° ~ (300+ α/2) °, CPU44 uses formula (5).

When N is (300+ α/2) ° ~ (480-α/2) °, CPU44 uses formula (6).

When N is (480-α/2) ° ~ (480+ α/2) °, CPU44 uses formula (7).

When N is (480+ α/2) ° ~ (660-α/2) °, CPU44 uses formula (8).

When N is (660-α/2) ° ~ (660+ α/2) °, CPU44 uses formula (9).

When N is (660+ α/2) ° ~ 720 °, CPU44 uses formula (10).

In 30 and formula (7) in formula (2) ~ (4), (6), (8), (10)-30 is values variable pro rata with the carrying amount of cloth 100 (the distance L of Figure 14).

As represented in formula (1), the value of α is relevant with the thick Z of cloth.The work feed shaft angle M calculated in formula (2) ~ (10) changes according to the value of α.That is, the corresponding relation of upper shaft angle and work feed shaft angle is thick and change according to cloth.The value of α represents that work feed motor 35 stops and standby angular range (angular amplitude of upper shaft angle).Below, α is called stagnation angle.

Such as, when CPU44 detects that the thick Z of cloth is 5mm, CPU44 calculates stagnation angle [alpha]=60 ° according to formula (1).CPU44 calculates the corresponding relation of upper shaft angle and work feed shaft angle according to formula (2) ~ formula (10).When the thick Z of cloth is 5mm and upper shaft angle changes in the scope of 0 ° ~ 720 °, the corresponding relation that CPU44 calculates is solid line 901 (with reference to Figure 13).Therefore, feeding tooth 34 moves along the movement locus identical with thick thing track 902 (with reference to Figure 14).When the thick Z of cloth is 5mm, stagnating angle [alpha] is 60 °.Therefore, when feeding tooth 34 moves along thick thing track 902, work feed motor 35 stops and standby angular range (such as from symbol 902C to the 902E of Figure 13 between etc.) is 60 °.

When CPU44 detects that the thick Z of cloth is 0mm, CPU44 calculates stagnation angle [alpha]=0 ° according to formula (1).That is, there is not work feed motor 35 to stop and standby angular range.CPU44 calculates the corresponding relation of upper shaft angle and work feed shaft angle according to formula (2) ~ formula (10).When the thick Z of cloth is 0mm and upper shaft angle changes in the scope of 0 ° ~ 720 °, the corresponding relation that CPU44 calculates is dotted line 801 (with reference to Figure 13).Therefore, feeding tooth 34 moves along the movement locus identical with thin thing track 802 (with reference to Figure 14).That is, stagnate angle [alpha] larger, then work feed motor 35 stops and standby angular range (between 902C to the 902D of Figure 14 etc.) is larger.That is, the cloth of cloth 100 is thick larger, then start more to postpone period, and tail end more ahead of time.

With reference to Figure 22, the 4th work feed process is described.4th work feed process is the movement locus using the mathematical expression calculating work feed shaft angle to change feeding tooth 34, carries the process of cloth 100.In the following description, also the description thereof will be omitted to represent the process identical with the first work feed process (with reference to Figure 17) with identical symbol.

When the power supply of Sewing machines 1 is connected, CPU44 starts the 4th work feed process.Shaft angle (S12) in CPU44 acquisition, and the cloth obtaining cloth 100 thick (S13).CPU44 reads formula (1) ~ (10) from ROM45.The upper shaft angle that CPU44 will obtain in S12 substitutes into N, by the cloth thick substitution Z of cloth 100 obtained in S13, calculates work feed shaft angle M (S41).CPU44 controls work feed motor 35, makes driving shaft 36 rotate to be formed in the work feed shaft angle (S17) calculated in S41.Such as, when the cloth of cloth 100 is thick be 5mm time, feeding tooth 34 moves along the movement locus identical with thick thing track 902 (with reference to Figure 14).When the varied in thickness of cloth 100, the movement locus of feeding tooth 34 is according to formula (1) ~ formula (10) change.That is, beginning period and tail end change according to the thickness of cloth 100.CPU44 makes process proceed to S18.When upper shaft angle change, process turns back to S12.4th work feed process terminates when the power supply of Sewing machines 1 disconnects.

As mentioned above, CPU44 carries out the 4th work feed process.In the present embodiment, after CPU44 calculates work feed shaft angle, drived control is carried out to work feed motor 35, thus drive feeding tooth 34.In this process, CPU44 calculates beginning period and tail end.That is, CPU44 calculates corresponding beginning period thick in the cloth of cloth 100 and tail end.CPU44 carries out drived control according to the beginning period calculated and tail end to work feed motor 35.Therefore, in the present embodiment, CPU44 can according to the movement locus of the cloth of cloth 100 thick change feeding tooth 34.Sewing machines 1 can transfer cloth 100 suitably according to cloth is thick, can prevent the reduction of quality of sewing.

In the above-described embodiment, main motor 13 and upper and lower actuating unit 47 are equivalent to knee-action mechanism of the present invention.Poewr transmission mechanism 40 is equivalent to actuating unit of the present invention.Work feed motor 35 is equivalent to motor of the present invention.The CPU44 carrying out S15, S16, S24, S17 process is equivalent to motor control part of the present invention.The CPU44 carrying out S14, S22, S23 process is equivalent to the thick judging part of cloth of the present invention.The change-over switch of operating portion 10 is equivalent to switching part of the present invention.The CPU44 carrying out S21 process is equivalent to configuration part of the present invention.The CPU44 carrying out S41 process is equivalent to calculating part of the present invention.

Above-mentioned embodiment can carry out various change.In the 4th embodiment, it is thick and calculate work feed shaft angle that CPU44 obtains the cloth of cloth 100, automatically changes the movement locus of feeding tooth 34.But, such as CPU44 also changes by change-over switch etc. the mathematical expression calculated work feed shaft angle, changes the movement locus of feeding tooth 34.Such as, the mathematical expression of formula (2) ~ (10) when thick for cloth Z is 0mm or 5mm by ROM45 is stored as the calculating formula of thin thing use or thick thing respectively.In this variation, change the process of S15 and S16 of the 3rd embodiment.When the change-over switch of operating portion 10 is not the setting of thick thing (S31: no), CPU44 calculates work feed shaft angle (S15) according to the calculating formula of thin thing.When the change-over switch of operating portion 10 is the settings of thick thing (S31: yes), CPU44 calculates work feed shaft angle (S16) according to the calculating formula of thick thing.CPU44 carries out drived control according to the work feed shaft angle calculated to feeding tooth 34.In this variation, Sewing machines 1 can according to the movement locus of the cloth of cloth 100 thick change feeding tooth 34.Therefore, Sewing machines 1 can transfer cloth 100 suitably according to cloth is thick, can prevent the reduction of quality of sewing.The switching of mathematical expression also can not with change-over switch interlock.Such as, it is thick that CPU44 can obtain cloth in the same manner as first, second embodiment, and according to the thick switching mathematical expression of cloth obtained.

Sewing machines 1 can not comprise change-over switch and comprise contact panel.Operator can carry out operation to contact panel etc. and carry out motion switch track.

Sewing machines 1 also can comprise the potentiometer detected the height and position of presser bar 63.CPU44 also can not use Hall element 73 and use potentiometer to detect cloth is thick.Potentiometric resistance value changes along with moving up and down of presser bar 63.CPU44 obtains the change of change as voltage of resistance value.CPU44 detects the change of voltage, thus detects that the cloth of cloth 100 is thick.

Sewing machines 1 also can not comprise Hall element 73 and comprise when the height and position of presser bar 63 reaches more than threshold value from disconnecting the switch switching to connection.Switch is such as located at when the presser feet bar cramp 59 of presser bar 63 rises to than threshold value height, the position that presser feet bar cramp 59 can be depressed.Also can be configured to the mechanism of the interlock that moves up and down of presser bar 63, switch be depressed.CPU44 switches between disconnection and connection along with switch, changes the movement locus of feeding tooth 34.

Such as also can compared with the position shown in Figure 14 slightly by upside relative to the position of needle plate 15 upper surface of the movement locus of the feeding tooth 34 shown in Figure 14.As long as CPU44 regulates the translational speed of the feeding tooth 34 along the movement of thick thing track 902, beginning period, tail end etc., to make the carrying amount along the feeding tooth 34 of thin thing track 802 movement identical with the carrying amount of the feeding tooth 34 along the movement of thick thing track 902.

The movement locus of feeding tooth 34 is not limited to above-mentioned embodiment.Such as, CPU44 also only can change in beginning period of feeding tooth 34 and tail end.When CPU44 only changes beginning period, such as feeding tooth 34 moves along the movement locus 96 shown in Figure 23.

When CPU44 changes beginning period or tail end, feeding tooth 34 action to front-rear direction stops.But, such as feeding tooth 34 also can move by low speed in the longitudinal direction.If feeding tooth 34 is when starting period and tail end changes with low speed action, then such as feeding tooth 34 moves with the movement locus 97 shown in Figure 24.In movement locus 97, when the carrying of cloth starts (on the right side of paper) and carrying at the end of (on the left of paper) slightly fillet.Due to Sewing machines 1 for make feeding tooth 34 along the vertical direction action structure from for making the structure of its action along the longitudinal direction different, therefore, CPU44 can make feeding tooth 34 move along various movement locus.

In the second work feed process, CPU44 sets first threshold and Second Threshold.CPU44 also can set the threshold value of more than three.As long as CPU44 judges which scope in multiple scopes that the thick threshold value belonging to more than three of the cloth of cloth 100 marks off.As long as the scope belonging to CPU44 is thick according to the cloth of cloth 100 changes at least one in beginning period and tail end.

Claims (17)

1. a Sewing machines, comprising:

Feeding table, this feeding table supports the feeding tooth transferring cloth on carrying direction;

Knee-action mechanism (47), this knee-action mechanism applies the action of above-below direction to described feeding table; And

Actuating unit (40), this actuating unit applies the action in described carrying direction to described feeding table,

It is characterized in that, comprising:

Work feed motor (35), this work feed motor drives described actuating unit;

Main motor (13), this main motor drives described knee-action mechanism; And

Motor control part (44), this motor control part carries out drived control to described work feed motor, to make described feeding table move up in described carrying side according to the above-below direction action of the described feeding table that described knee-action mechanism applies under the driving of described main motor, and thick according to the cloth of described cloth, make described feeding table at least one change in the beginning period and tail end of the action in described carrying direction relative to the above-below direction action of described feeding table.

2. Sewing machines as claimed in claim 1, is characterized in that,

Comprise the thick thick judging part of cloth (44) whether being in more than threshold value and judging of described cloth,

When the thick judging part of described cloth is judged as that described cloth is thick and is in more than described threshold value, described motor control part carries out drived control to described work feed motor, and described tail end when not being judged as that described cloth is thick to make described tail end being in more than described threshold value than the thick judging part of described cloth ahead of time.

3. Sewing machines as claimed in claim 1, is characterized in that,

Comprise the thick thick judging part of cloth (44) whether being in more than threshold value and judging of described cloth,

When the thick judging part of described cloth is judged as that described cloth is thick and is in more than described threshold value, described motor control part carries out drived control to described work feed motor, and described beginning when not being judged as that described cloth is thick to make described beginning period being in more than described threshold value than the thick judging part of described cloth is postponed period.

4. Sewing machines as claimed in claim 2, is characterized in that,

When the thick judging part of described cloth is judged as that described cloth is thick and is in more than described threshold value, described motor control part carries out drived control to described work feed motor, and described beginning when not being judged as that described cloth is thick to make described beginning period being in more than described threshold value than the thick judging part of described cloth is postponed period.

5. Sewing machines as claimed in claim 2, is characterized in that,

When the thick judging part of described cloth is judged as that described cloth is thick and is in more than described threshold value, described motor control part carries out drived control to described work feed motor, and described translational speed when not being judged as that described cloth is thick to make the translational speed of described feeding table on described carrying direction being in more than described threshold value than the thick judging part of described cloth is fast.

6. Sewing machines as claimed in claim 3, is characterized in that,

When the thick judging part of described cloth is judged as that described cloth is thick and is in more than described threshold value, described motor control part carries out drived control to described work feed motor, and described translational speed when not being judged as that described cloth is thick to make the translational speed of described feeding table on described carrying direction being in more than described threshold value than the thick judging part of described cloth is fast.

7. Sewing machines as claimed in claim 4, is characterized in that,

When the thick judging part of described cloth is judged as that described cloth is thick and is in more than described threshold value, described motor control part carries out drived control to described work feed motor, and described translational speed when not being judged as that described cloth is thick to make the translational speed of described feeding table on described carrying direction being in more than described threshold value than the thick judging part of described cloth is fast.

8. the Sewing machines according to any one of claim 2 ~ 7, is characterized in that,

Comprise the configuration part (44) that multiple threshold value is set,

The thick judging part of described cloth judges thick which scope belonged in multiple scopes that described multiple threshold value marks off of described cloth,

According to the described scope that the thick judging part of described cloth is judged, described motor control part carries out drived control to described work feed motor, to change at least one in described beginning period and described tail end.

9. Sewing machines as claimed in claim 1, is characterized in that,

Comprise switching part (10), this switching part in the first state and can represent that is the thick large state of the cloth of the first state described in described cloth thickness rate switches between the second state,

When described switching part is in described second state, described motor control part carries out drived control to described work feed motor, and described tail end when being in described first state to make the tail end of the action of described feeding table on described carrying direction than described switching part ahead of time.

10. Sewing machines as claimed in claim 1, is characterized in that,

Comprise switching part (10), this switching part in the first state and can represent that is the thick large state of the cloth of the first state described in described cloth thickness rate switches between the second state,

When described switching part is in described second state, described motor control part carries out drived control to described work feed motor, and described beginning when being in described first state to make beginning period of the action of described feeding table on described carrying direction than described switching part is postponed period.

11. Sewing machiness as claimed in claim 9, is characterized in that,

When described switching part is in described second state, described motor control part carries out drived control to described work feed motor, and described beginning when being in described first state to make beginning period of the action of described feeding table on described carrying direction than described switching part is postponed period.

12. Sewing machiness as claimed in claim 9, is characterized in that,

When described switching part is in the second state, described motor control part carries out drived control to described work feed motor, and described translational speed when being in the first state to make the translational speed of described feeding table on described carrying direction than described switching part is fast.

13. Sewing machiness as claimed in claim 10, is characterized in that,

When described switching part is in the second state, described motor control part carries out drived control to described work feed motor, and described translational speed when being in the first state to make the translational speed of described feeding table on described carrying direction than described switching part is fast.

14. Sewing machiness as claimed in claim 11, is characterized in that,

When described switching part is in the second state, described motor control part carries out drived control to described work feed motor, and described translational speed when being in the first state to make the translational speed of described feeding table on described carrying direction than described switching part is fast.

15. Sewing machiness according to any one of claim 1 ~ 7,9 ~ 14, is characterized in that,

Comprise the storage device storing multiple data, the scope that the plurality of data representation is thick with multiple cloth distinguishes at least one in corresponding described beginning period and described tail end,

Described motor control part is thick according to described cloth, carries out drived control according to any one in the described multiple data stored in described storage device to described work feed motor.

16. Sewing machiness as claimed in claim 8, is characterized in that,

Comprise the storage device storing multiple data, the scope that the plurality of data representation is thick with multiple cloth distinguishes at least one in corresponding described beginning period and described tail end,

Described motor control part is thick according to described cloth, carries out drived control according to any one in the described multiple data stored in described storage device to described work feed motor.

17. Sewing machiness as claimed in claim 1, is characterized in that,

Comprise the calculating part (44) calculating corresponding described beginning period thick in the cloth of described cloth and described tail end,

At least one in the described beginning period that described motor control part calculates according to described calculating part and described tail end carries out drived control to described work feed motor.