CN105133197A

CN105133197A - Sewing machine

Info

Publication number: CN105133197A
Application number: CN201510289082.0A
Authority: CN
Inventors: 加藤雅史
Original assignee: Brother Industries Ltd
Current assignee: Brother Industries Ltd
Priority date: 2014-05-30
Filing date: 2015-05-29
Publication date: 2015-12-09
Anticipated expiration: 2035-05-29
Also published as: CN105133197B; JP6361292B2; JP2015226600A

Abstract

The present invention provides a sewing machine which is easy to change the extruding and mergence positions of an opening part of a clothing feeding tooth needle plate. A CPU displays the front side, the central side and the rear side as the option of the front and back positions of clothing feeding tooth extruding and mergence on a display part. A user observes the display part and operates an operation part simultaneously, and selects the front and back positions of the clothing feeding tooth. The CPU receives the front and back positions of the clothing feeding tooth inputted by the operation part, and acquires the clothing feeding data corresponding to the front and back positions of the clothing feeding tooth. The CPU drives a main motor and a clothing feeding motor simultaneously according to the acquired clothing feeding data. The clothing feeding tooth swings from the selected front position and back position back and forth, and the CPU executes the sewing action.

Description

Sewing machines

Technical field

The present invention relates to a kind of Sewing machines.

Background technology

Be known to a kind of Sewing machines with cloth conveying teeth for the cloth of transport arrangement on needle plate.Sewing machines such as disclosed in Japanese Unexamined Patent Publication No. 179980 publications in 2013 comprises needle plate, cloth conveying teeth, up and down conveying axis, main motor, horizontal feed axle and work feed motor.Needle plate has the opening portion that can give prominence to for cloth conveying teeth and submerge.One end of upper and lower conveying axis and cloth conveying teeth are connected, and the other end and main motors are tied.One end of horizontal feed axle and cloth conveying teeth are connected, and the other end is tied by linkage and work feed motors.Main motor makes upper and lower conveying axis rotate, thus cloth conveying teeth is moved back and forth in the vertical direction.Work feed motor makes the positive reverse rotation of horizontal feed axle, thus cloth conveying teeth is moved back and forth on the throughput direction of cloth.Upper and lower conveying axis and horizontal feed axle keep prescribed phases relation ground to rotate.Therefore, cloth conveying teeth reciprocally swinging.The cloth conveying teeth of reciprocally swinging is given prominence to from opening portion and submerges and carry the cloth on needle plate.According to thickness, kind, the sewing operation of the cloth carried on needle plate, the position that cloth conveying teeth is given prominence to from opening portion and submerged sometimes to be changed in the conveying direction.In above-mentioned Sewing machines, easily cannot change the position that cloth conveying teeth is given prominence to from opening portion and submerged.

Summary of the invention

The object of the invention is to, a kind of Sewing machines is provided, easily can change the position that cloth conveying teeth is given prominence to from the opening portion of needle plate and submerged.

The Sewing machines of technical scheme 1 comprises: cloth pushing table, and cloth conveying teeth is supported on this cloth pushing table; Needle plate, it is provided with the opening portion of giving prominence to for above-mentioned cloth conveying teeth and submerging; Knee-action mechanism, it makes above-mentioned cloth pushing table move up and down; Motor, it makes driving shaft reciprocating rotation within the specific limits; Power conversion mechanism, the reciprocating rotation of above-mentioned driving shaft is converted to above-mentioned cloth pushing table moving back and forth in the horizontal direction by it; And control part, moving up and down that itself and above-mentioned cloth pushing table carry out under above-mentioned knee-action mechanism acts on correspondingly controls the driving of said motor, and makes above-mentioned drive shaft turns; The feature of this Sewing machines is, comprising: the first receiving portion, and it accepts the changed content of the slewing area of the above-mentioned driving shaft of change that the first input part inputs; And slewing area changing unit, its changed content accepted according to above-mentioned first receiving portion, is maintaining the slewing area changing above-mentioned driving shaft under the constant state of the above-mentioned cloth conveying teeth amount of movement in the horizontal direction given prominence to from above-mentioned opening portion; Above-mentioned control part controls the driving of said motor in the mode making above-mentioned driving shaft and rotate in the slewing area that above-mentioned slewing area changing unit changes.Operator changes the instruction of slewing area to the first input part input.First receiving portion accepts the changed content being input to the first input part.The changed content that slewing area changing unit accepts according to the first receiving portion performs change.The slewing area of driving shaft is changed by slewing area changing unit, thus the position change that cloth conveying teeth is given prominence to from the opening portion of needle plate and submerged.Operator is without the need to manual motivation of adjustment switching mechanism, and the position that is outstanding and that submerge of cloth conveying teeth can change automatically.Therefore, Sewing machines easily can change the position that cloth conveying teeth is given prominence to from the opening portion of needle plate and submerged.Even if the position change that cloth conveying teeth is given prominence to and submerged, the work feed pitch of cloth is also constant.Therefore, even if also to maintain stitch length when the outstanding of cloth conveying teeth and the position submerged change constant for Sewing machines.

In the Sewing machines of technical scheme 2 can be, above-mentioned power conversion mechanism comprises: the first arm, and an end of this first arm and above-mentioned driving shaft are linked to the top ends of this driving shaft orthogonally; Second arm, the mode that an end of this second arm can swing with this second arm is connected with the other end contrary with an end of above-mentioned first arm of above-mentioned first arm; And the 3rd arm, the mode that one end of the 3rd arm can swing with the 3rd arm is connected with the other end contrary with an end of above-mentioned second arm of above-mentioned second arm, and the other end contrary with an end of above-mentioned 3rd arm of the 3rd arm and above-mentioned cloth pushing table are connected.When driving shaft reciprocating rotation one time, the first arm centered by driving shaft reciprocating rotation once, the other end reciprocally swinging of the second arm once.Along with the second arm the other end reciprocally swinging once, once, cloth pushing table moves back and forth once the 3rd arm reciprocally swinging in the horizontal direction.Therefore, when driving shaft reciprocating rotation one time, cloth conveying teeth moves back and forth once in the horizontal direction.One of driving shaft time reciprocating rotation can be converted to cloth conveying teeth once moving back and forth in the horizontal direction by Sewing machines.Switch the rotation direction of driving shaft by means of only motor, namely Sewing machines changes the moving direction of cloth pushing table.Therefore, Sewing machines can make cloth conveying teeth move back and forth with simple structure.

The Sewing machines of technical scheme 3 can be, comprise: the second receiving portion, the changed content on it accepts that the second input part inputs change specific opportunity, this specific opportunity be relative to the action in the vertical direction of above-mentioned cloth pushing table, above-mentioned cloth pushing table at least one opportunity in the beginning opportunity and end opportunity of horizontal direction action; And opportunity changing unit, its changed content accepted according to above-mentioned second receiving portion changes specific opportunity; Above-mentioned control part controls the driving of said motor in the mode making above-mentioned driving shaft and rotate under the specific opportunity that above-mentioned opportunity, changing unit changed.Operator changes the instruction on specific opportunity to the second input part input.Second receiving portion accepts the changed content being input to the second input part.The changed content that opportunity, changing unit accepted according to the second receiving portion performs change.Because opportunity, changing unit changed be relative to cloth conveying teeth action in the vertical direction, cloth conveying teeth to specific opportunity of horizontal direction action, therefore, Sewing machines can change the movement locus of cloth conveying teeth.Therefore, Sewing machines can perform the work feed action corresponding to the thickness of cloth.

The Sewing machines of technical scheme 4 can be comprise: the 3rd receiving portion, and it accepts arbitrary pattern stitch mode being set as first mode and being different from the second pattern of above-mentioned first mode; And configuration part, above-mentioned stitch mode is set as the pattern that above-mentioned 3rd receiving portion accepts by it; Operator selects the pattern of the movement locus of the above-mentioned cloth conveying teeth corresponding to the pattern set by above-mentioned configuration part to input to above-mentioned second input part in the pattern of the movement locus of multiple above-mentioned cloth conveying teeth; The specific opportunity of the pattern of the movement locus of above-mentioned cloth conveying teeth is different.Operator selects the pattern of the movement locus of the cloth conveying teeth corresponding to the pattern set by configuration part to input to the second input part in the pattern of the movement locus of multiple cloth conveying teeth.Therefore, Sewing machines does not accept the pattern of the movement locus of the cloth conveying teeth not corresponding with the pattern that configuration part sets, therefore, it is possible to improve the convenience of the movement locus changing cloth conveying teeth.

In the Sewing machines of technical scheme 5 can be, above-mentioned opportunity, changing unit changed as follows, compared with situation when setting above-mentioned second pattern with above-mentioned configuration part, when above-mentioned configuration part sets above-mentioned first mode, above-mentioned cloth conveying teeth to horizontal direction action, delay opportunity to the beginning of the action risen on the position that above-mentioned opening portion is outstanding relative to the position of above-mentioned cloth conveying teeth from the below being in above-mentioned needle plate.When configuration part sets first mode, cloth conveying teeth is delayed to the action of horizontal direction the opportunity that starts automatically.Cloth conveying teeth make cloth be moved upward after move to horizontal direction again.Cloth conveying teeth also can not skid relative to cloth when carried cloth is thicker.Therefore, Sewing machines can reliably carry the cloth that cloth is thick, and quality of sewing can be prevented to be deteriorated.

In the Sewing machines of technical scheme 6 can be, above-mentioned opportunity, changing unit changed as follows: compared with situation when setting above-mentioned second pattern with above-mentioned configuration part, when above-mentioned configuration part sets above-mentioned first mode, above-mentioned cloth conveying teeth to horizontal direction action, end opportunity of action of declining from the position outstanding from above-mentioned opening portion to the position of the below being in above-mentioned needle plate relative to above-mentioned cloth conveying teeth in advance.When configuration part sets first mode, end shifts to an earlier date opportunity automatically.Before cloth conveying teeth makes cloth mobile end, eedle does not thrust cloth.Therefore, Sewing machines can prevent quality of sewing to be deteriorated.

Can be that the mode of the rotating speed of the above-mentioned driving shaft when rotating speed of above-mentioned driving shaft when above-mentioned control part is to make above-mentioned configuration part set above-mentioned first mode sets above-mentioned second pattern higher than above-mentioned configuration part controls the driving of said motor in the Sewing machines of technical scheme 7,8.When the 3rd receiving portion receives first mode, control part improves the rotating speed of driving shaft.Therefore, when the 3rd receiving portion receives the arbitrary pattern in first mode and the second pattern, cloth conveying teeth completes the movement in horizontal direction with can not both changing the conveying capacity of conveying cloth.Even if when the thick inconstant cloth of cloth conveying teeth conveying cloth, the interval (length of needle tracking) of making is also constant.Therefore, Sewing machines also can maintain quality of sewing when the thick inconstant cloth of conveying cloth.

Accompanying drawing explanation

Fig. 1 is the stereogram of Sewing machines 1.

Fig. 2 is the amplification stereogram near eedle 8 and needle plate 15.

Fig. 3 is the left view that cloth conveying teeth 34 is positioned at the cloth feeding mechanism 32 of the center side of work feed perforation 19.

Fig. 4 is the left view that cloth conveying teeth 34 is arranged in the cloth feeding mechanism 32 of the front side of work feed perforation 19.

Fig. 5 is the left view that cloth conveying teeth 34 is arranged in the cloth feeding mechanism 32 of the rear side of work feed perforation 19.

Fig. 6 is the left view of movement locus 101,201,301,401.

Fig. 7 is the block diagram of the electrical structure of Sewing machines 1.

Fig. 8 is the data structure diagram of work feed tables of data 80.

Fig. 9 is the data structure diagram of work feed data 502.

Figure 10 is the flow chart of work feed process.

Figure 11 is the flow chart of movement locus setting process.

Figure 12 is the figure of the display part 11 of the option of the front and back position representing that display cloth conveying teeth 34 is outstanding from needle plate 15 and submerge.

Figure 13 is the figure of the display part 11 representing display action track 101,201.

Figure 14 is the figure of the display part 11 representing display action track 201,301,401.

Detailed description of the invention

Hereinafter, with reference to the accompanying drawings of the first embodiment of the present invention.Below illustrate and use the top to bottom, left and right, front and rear shown in arrow in figure.The structure of Sewing machines 1 is described with reference to Fig. 1 ~ Fig. 6.Sewing machines 1 comprises support portion 2, column sections 3 and horn portion 4.Support portion 2 is the base of Sewing machines 1.By Sewing machines 1 being installed on workbench 20 in the opening that support portion 2 is embedded into workbench 20 upper surface from top.The right-hand member of column sections 3 from support portion 2 extends towards vertical top.Horn portion 4 extends to the left from the upper end of column sections 3.Horn portion 4 is relative with the upper surface in support portion 2.Horn portion 4 is provided with presser feet 17 below left part.Presser feet 17 has press section 25 in bottom.Press section 25 has extended portion 27 and introduction part 28.Extended portion 27 and support portion 2 extend abreast.Introduction part 28 extends towards oblique front upper place respectively from the left and right sides portion of front end, extended portion 27.Horn portion 4 maintains shank 7 in inside.Shank 7 is provided with eedle 8 in lower end.Shank 7 and eedle 8 move back and forth up and down under the driving of main motor 13.Horn portion 4 has thread take-up tension lever 9 in front, left part.Thread take-up tension lever 9 moves up and down along with shank 7.Horn portion 4 is fixed with operating portion 10 at upper surface.Operating portion 10 has display part 11 and action button 6 at front surface.Operator observes display part 11 while operate action button 6, inputs various instruction to Sewing machines 1.Sewing machines 1 can switch stitch mode.Arbitrary pattern that the stitch mode of Sewing machines 1 is chosen as in general mode and thick thing pattern by operation action button 6 by operator.Operator selects thick thing pattern when the cloth that sewing fabric is thick, at other time, select general mode.

The lower surface of workbench 20 is located at by control device 30.Control device 30 is connected with the pedal 22 of override type by connecting rod 21.Operator is to front side or rear side operating pedal 22.Control device 30 controls the action of Sewing machines 1 according to the direction of operating of pedal 22 and operational ton.

The right flank top of column sections 3 is located at by main motor 13.Main shaft 14 is configured at the inside in horn portion 4.Main shaft 14 extends in left-right direction with the inside of the state that can rotate in horn portion 4.The right-hand member of main shaft 14 is connected with the output shaft of main motor 13.The left end of main shaft 14 is connected with shank up-down mechanism.Main motor 13 driving main shaft 14 and shank 7 and thread take-up tension lever 9 are moved up and down.As described later, the main motor 13 of present embodiment also makes cloth pushing table 33 and cloth conveying teeth 34 (with reference to Fig. 3) move up and down.

As shown in Figure 2, the upper surface left end in support portion 2 is located at by needle plate 15.Needle plate 15 has appearance pin hole 18 in substantially central portion.Lower end calm pin hole 18 when declining of eedle 8 passes through.Needle plate 15 has work feed perforation 19 respectively in the left of appearance pin hole 18, rear, right.Work feed perforation 19 is in rectangular shape longer in the longitudinal direction.Support portion 2 has shuttle mechanism and cloth feeding mechanism 32 (with reference to Fig. 3) in the bottom of needle plate 15.

As shown in Figure 3, cloth feeding mechanism 32 comprises cloth pushing table 33, cloth conveying teeth 34, horizontal transport agency 31 and upper and lower conveying mechanism 45.Cloth pushing table 33 is configured at the below of needle plate 15 with the state parallel with needle plate 15.Cloth pushing table 33 is fixed with three cloth conveying teeths 34 (illustrate only a cloth conveying teeth 34 in Fig. 3 ~ Fig. 5) at upper surface.Cloth conveying teeth 34 is corresponding with the position of work feed perforation 19 respectively.Cloth conveying teeth 34 is longer all in the longitudinal direction, and has in upper end for clamping the concavo-convex of cloth 60.

Horizontal transport agency 31 comprises swing arm 36, intermediate bar 38, connecting rod 39 and work feed motor 23.Horizontal transport agency 31 makes (being fore-and-aft direction in the present embodiment) the upper movement in the horizontal direction of cloth pushing table 33 and cloth conveying teeth 34.One end of the mode that the leading section of cloth pushing table 33 can swing with cloth pushing table 33 and swing arm 36 is connected.One end of the mode that the other end of swing arm 36 can swing with swing arm 36 and intermediate bar 38 is connected.Bolster 37 extends in left-right direction, and the mode can rotated with swing arm 36 supports the central portion of this swing arm 36.One end of the mode that the other end of intermediate bar 38 can swing with intermediate bar 38 and connecting rod 39 is connected.The other end of connecting rod 39 and the driving shaft 24 of work feed motor 23 are linked to the top ends of this driving shaft 24 orthogonally.When driving shaft 24 reciprocating rotation of work feed motor 23, the power of work feed motor 23 is passed to connecting rod 39, intermediate bar 38 and swing arm 36 successively.Swing arm 36 rotates centered by bolster 37.Cloth pushing table 33 moves back and forth in the longitudinal direction along with the rotation of swing arm 36.Therefore, along with driving shaft 24 reciprocating rotation within the specific limits of work feed motor 23, cloth pushing table 33 and cloth conveying teeth 34 move back and forth in the longitudinal direction.That is, the reciprocating rotation of driving shaft 24 is converted to cloth conveying teeth 34 moving back and forth in the longitudinal direction by horizontal transport agency 31.Work feed motor 23 is impulse motor.Sewing machines 1 can change the slewing area of driving shaft 24.The change of the slewing area of driving shaft 24 is changes of the position of at least one in an end of the slewing area of driving shaft 24 and the other end, comprises the change of the rotation amplitude of driving shaft 24.

Upper and lower conveying mechanism 45 comprises branch 35 and carries cam 40 up and down.Upper and lower conveying mechanism 45 makes cloth pushing table 33 and cloth conveying teeth 34 move in the vertical direction.Branch 35 is located at the rear portion of cloth pushing table 33.Branch 35 extends downwards from the position slightly by front of cloth pushing table 33 rear end, more rearward bends.Accompany between branch 35 and the rearward end of cloth pushing table 33 and carry cam 40 up and down.Cam 40 is carried to be the eccentric cams being fixed on driving shaft 41 up and down.When driving shaft 41 rotates, carry cam 40 to rotate up and down, cloth pushing table 33 moves up and down.In the Sewing machines 1 of present embodiment, driving shaft 41 is connected with transmission mechanism.This transmission mechanism is connected with main shaft 14 (with reference to Fig. 1).The rotation of main shaft 14 is passed to driving shaft 41 via transmission mechanism.The rotation of main shaft 14 and the rotation of driving shaft 41 synchronous.Therefore, along with the rotation of the output shaft of main motor 13, cloth pushing table 33 and cloth conveying teeth 34 move back and forth up and down.In shank 7 and eedle 8 up and down reciprocatingly once period, cloth pushing table 33 and cloth conveying teeth 34 are up and down reciprocatingly once.Main motor 13 makes output shaft rotate, and work feed motor 23 makes driving shaft 24 reciprocating rotation, and thus, cloth conveying teeth 34 can reciprocally swinging.The upper end of the cloth conveying teeth 34 of reciprocally swinging is given prominence to from work feed perforation 19 and submerges.In the upper end of cloth conveying teeth 34 when work feed perforation 19 is given prominence to, cloth conveying teeth 34 can carry cloth 60 along the longitudinal direction.

With reference to Fig. 3 ~ Fig. 5, the action of the front and back position of the cloth conveying teeth 34 changing reciprocally swinging is described.In figure 3, cloth conveying teeth 34 is positioned at the fore-and-aft direction approximate centre of work feed perforation 19.Below, the turned position of the driving shaft 24 when cloth conveying teeth 34 being positioned at the fore-and-aft direction approximate centre of work feed perforation 19 is called the first turned position.Along with driving shaft 24 centered by the first turned position in the scope of angle [alpha] reciprocating rotation, cloth conveying teeth 34 is at the fore-and-aft direction center side reciprocally swinging of work feed perforation 19.As shown in Figure 3, Figure 4, when the driving shaft 24 that work feed motor 23 makes to be in the first turned position counter clockwise direction of looking around a left side under state is rotated, the counter clockwise direction that connecting rod 39 is looked under state around a left side centered by driving shaft 24 is rotated.Along with the rotation of driving shaft 24, the linking part between intermediate bar 38 and swing arm 36 rearward moves.The clockwise direction that swing arm 36 is looked under state around a left side centered by bolster 37 rotates.Cloth conveying teeth 34 and cloth pushing table 33 forwards move (with reference to Fig. 4).When the center of the slewing area of driving shaft 24 becomes the second turned position (with reference to Fig. 4), the position of cloth conveying teeth 34 reciprocally swinging is to front side displacement.Second turned position is the position of the counter clockwise direction side under the state of looking of keeping left than the first turned position.The position of cloth conveying teeth 34 reciprocally swinging is such as 2mm to the displacement of front side displacement.Along with driving shaft 24 centered by the second turned position in the scope of angle beta reciprocating rotation, the front side reciprocally swinging of cloth conveying teeth 34 in work feed perforation 19.As shown in Fig. 3, Fig. 5, when the driving shaft 24 that work feed motor 23 makes to be in the first turned position clockwise direction looked around a left side under state rotates, the clockwise direction that connecting rod 39 is looked under state around a left side centered by driving shaft 24 rotates.Along with the rotation of driving shaft 24, the linking part between intermediate bar 38 and swing arm 36 forwards moves (with reference to Fig. 5).The counter clockwise direction that swing arm 36 is looked under state around a left side centered by bolster 37 is rotated.Cloth conveying teeth 34 and cloth pushing table 33 rearward move.When the center of the slewing area of driving shaft 24 becomes the 3rd turned position (with reference to Fig. 5), the position of cloth conveying teeth 34 reciprocally swinging is to rear side displacement.3rd turned position is the position of the clockwise direction side under the state of looking of keeping left than the first turned position.The position of cloth conveying teeth 34 reciprocally swinging is such as 2mm to the displacement of rear side displacement.Along with driving shaft 24 centered by the 3rd turned position in the scope of angle γ reciprocating rotation, the rear side reciprocally swinging of cloth conveying teeth 34 in work feed perforation 19.

With reference to Fig. 3, Fig. 6, the track formed is described, i.e. movement locus 101,201,301,401 from work feed perforation 19 cloth conveying teeth 34 that is outstanding and that submerge.In figure 6, only the upper surface imaginary line of needle plate 15 illustrates out.The beginning opportunity of the reciprocating rotation that work feed motor 23 can change driving shaft 24 for the rotation of the output shaft of main motor 13 and end opportunity.That is, Sewing machines 1 can change relative to cloth conveying teeth 34 move up and down, at least one opportunity that the conveying action of cloth conveying teeth 34 starts in opportunity and conveying release opportunity.Conveying action opportunity of starting is the beginning opportunity of cloth conveying teeth 34 to throughput direction action.Conveying release opportunity is the end opportunity of cloth conveying teeth 34 to throughput direction action.In the present embodiment, throughput direction is the direction gone towards rear from front.Throughput direction and horizontal direction parallel.Therefore, the track that the cloth conveying teeth 34 of reciprocally swinging is formed can be changed to movement locus 101,201,301,401 by Sewing machines 1.Movement locus 101 is tracks that operator becomes alternative when the stitch mode of Sewing machines 1 is set as general mode.Movement locus 201 be operator the stitch mode of Sewing machines 1 is set as in general mode and thick thing pattern any one time all become the track of alternative.Movement locus 301,401 is tracks that operator becomes alternative when the stitch mode of Sewing machines 1 is set as thick thing pattern.

Movement locus 101 is described.Position 101A ~ 101D represents the specific point on movement locus 101 separately.Position 101A, 101C are the contour positions of the upper end of cloth conveying teeth 34 and needle plate 15.Position 101A is in the rear of position 101C.Position 101B, 101D are the upper end of cloth conveying teeth 34 is positioned at the upper side and lower side of needle plate 15 position in throughput direction substantial middle respectively.Cloth conveying teeth 34 from position 101A via position 101B to position 101C displacement time, main motor 13 and work feed motor 23 synchronously drive.The upper end of cloth conveying teeth 34 is moved forward in the downside of needle plate 15 (arrow 103 in Fig. 6).Upper end due to cloth conveying teeth 34 is positioned at the downside of needle plate 15, and therefore, cloth conveying teeth 34 does not carry cloth 60.Cloth conveying teeth 34 from position 101C via position 101D to position 101A displacement time, main motor 13 and work feed motor 23 synchronously drive.The upper end of cloth conveying teeth 34 is moved towards the rear in the upside of needle plate 15 (arrow 104 in Fig. 6).Upper end due to cloth conveying teeth 34 is positioned at the upside of needle plate 15, and therefore, cloth conveying teeth 34 rearward carries cloth 60.In movement locus 101, cloth conveying teeth 34 carries the beginning of the action of cloth 60 to be opportunity that the upper end of cloth conveying teeth 34 is when being in position 101C.Cloth conveying teeth 34 carries the end of the action of cloth 60 to be opportunity that the upper end of cloth conveying teeth 34 is when being in position 101A.That is, the upper end of cloth conveying teeth 34 is in the opportunity of the position contour with needle plate 15 is that the conveying action of cloth conveying teeth 34 starts opportunity or carries release opportunity.

Movement locus 201 is described.Position 201A ~ 201D represents the specific point on movement locus 201 separately.Position 201A, 201C are the contour positions of the upper end of cloth conveying teeth 34 and needle plate 15.Position 201A is in the rear of position 201C.Position 201B is in the below of position 201C, and position 201D is in the top of position 201C.201B, 201C, 201D are arranged in substantially linear along the vertical direction in position.Cloth conveying teeth 34 from position 201A to position 201B displacement time, main motor 13 and work feed motor 23 synchronously drive.The upper end of cloth conveying teeth 34 does not contact with cloth 60 and moves forward in the downside of needle plate 15 (arrow 203 in Fig. 6).Cloth conveying teeth 34 from position 201B via position 201C to position 201D displacement time, main motor 13 drives, and work feed motor 23 does not drive.The upper end of cloth conveying teeth 34 rises to the upside of needle plate 15 from the downside of needle plate 15.The upper end of cloth conveying teeth 34 is outstanding from work feed perforation 19 (with reference to Fig. 3), but does not rearward carry cloth 60.Cloth conveying teeth 34 from position 201D to position 201A displacement time, cloth conveying teeth 34 rearward moves (arrow 204 in Fig. 6), and rearward carry cloth 60.In movement locus 201, cloth conveying teeth 34 carries the beginning of the action of cloth 60 to be opportunity that the upper end of cloth conveying teeth 34 is when being in position 201D.That is, cloth conveying teeth 34 carries beginning opportunity of the action of cloth 60 after the upper end of cloth conveying teeth 34 is above work feed perforation 19 is projected into.Therefore, in movement locus 201, relative to cloth conveying teeth 34 from work feed perforation 19 outstanding opportunity, that the conveying action of cloth conveying teeth 34 starts opportunity is more late than the situation of movement locus 101.In movement locus 201, cloth conveying teeth 34 carries the end of the action of cloth 60 to be opportunity that the upper end of cloth conveying teeth 34 is when being in position 201A.That is, cloth conveying teeth 34 carry the end of the action of cloth 60 be opportunity the upper end of cloth conveying teeth 34 and needle plate 15 contour time.Therefore, in movement locus 201, drop to from the top of needle plate 15 relative to the upper end of cloth conveying teeth 34 opportunity of the below of needle plate 15, the conveying release of cloth conveying teeth 34 is identical with the situation of movement locus 101 for opportunity.

Movement locus 301 is described.Position 301A ~ 301D represents the specific point on movement locus 301 separately.Position 301A, 301C are the contour positions of the upper end of cloth conveying teeth 34 and needle plate 15.Position 301A is in the rear of position 301C.Position 301B is in the below of position 301A, and position 301D is in the top of position 301A.301A, 301B, 301D are arranged in substantially linear along the vertical direction in position.Cloth conveying teeth 34 from position 301A to position 301B displacement time, main motor 13 drives, and work feed motor 23 does not drive.The upper end of cloth conveying teeth 34 drops to the downside of needle plate 15.In the upper end of cloth conveying teeth 34 from position 301B to position 301C displacement time, main motor 13 and work feed motor 23 synchronously drive.The upper end of cloth conveying teeth 34 does not contact with cloth 60 and moves forward in the downside of needle plate 15 (arrow 303 in Fig. 6).Cloth conveying teeth 34 from position 301C to position 301D displacement time, main motor 13 and work feed motor 23 synchronously drive.Cloth conveying teeth 34 rearward moves (arrow 304 in Fig. 6), and rearward carries cloth 60.In the upper end of cloth conveying teeth 34 from position 301D to position 301A displacement time, main motor 13 drives, and work feed motor 23 does not drive.The upper end of cloth conveying teeth 34 drops to the position contour with needle plate 15.In movement locus 301, cloth conveying teeth 34 carries the beginning of the action of cloth 60 to be opportunity that the upper end of cloth conveying teeth 34 is when being in position 301C.That is, cloth conveying teeth 34 carry the beginning of the action of cloth 60 be opportunity the upper end of cloth conveying teeth 34 and needle plate 15 contour time.Therefore, in movement locus 301, relative to cloth conveying teeth 34 from work feed perforation 19 outstanding opportunity, that the conveying action of cloth conveying teeth 34 starts opportunity is identical with the situation of movement locus 101.In movement locus 301, cloth conveying teeth 34 carries the end of the action of cloth 60 to be opportunity that cloth conveying teeth 34 is when being in position 301D.That is, cloth conveying teeth 34 is carried before the end of the action of cloth 60 drops to the below of needle plate 15 opportunity above needle plate 15 in the upper end of cloth conveying teeth 34.Therefore, in movement locus 301, drop to from the top of needle plate 15 relative to the upper end of cloth conveying teeth 34 opportunity of the below of needle plate 15, the conveying release of cloth conveying teeth 34 wants Zao than the situation of movement locus 101 opportunity.

Movement locus 401 is described.Position 401A ~ 401F represents the specific point on movement locus 401 separately.Position 401A, 401D are the contour positions of the upper end of cloth conveying teeth 34 and needle plate 15.Position 401A is in the rear of position 401D.Position 401B is in the below of position 401A, and position 401F is in the top of position 401A.401A, 401B, 401F are arranged in substantially linear along the vertical direction in position.Position 401C is in the below of position 401D, and position 401E is in the top of position 401D.401C, 401D, 401E are arranged in substantially linear along the vertical direction in position.In the upper end of cloth conveying teeth 34 from position 401A to position 401B displacement time, main motor 13 drives, and work feed motor 23 does not drive.The upper end of cloth conveying teeth 34 drops to the downside of needle plate 15.In the upper end of cloth conveying teeth 34 from position 401B to position 401C displacement time, main motor 13 and work feed motor 23 synchronously drive.Cloth conveying teeth 34 does not contact with cloth 60 and moves forward in the downside of needle plate 15 (arrow 403 in Fig. 6).Cloth conveying teeth 34 from position 401C via position 401D to position 401E displacement time, main motor 13 drives, and work feed motor 23 does not drive.The upper end of cloth conveying teeth 34 rises to the upside of needle plate 15 from the downside of needle plate 15.Cloth conveying teeth 34 does not rearward carry cloth 60.In the upper end of cloth conveying teeth 34 from position 401E to position 401F displacement time, main motor 13 and work feed motor 23 synchronously drive.Cloth conveying teeth 34 rearward moves (arrow 404 in Fig. 6), and rearward carries cloth 60.In the upper end of cloth conveying teeth 34 from position 401F to position 401A displacement time, main motor 13 drives, and work feed motor 23 does not drive.Cloth conveying teeth 34 drops to the position contour with needle plate 15.In movement locus 401, cloth conveying teeth 34 carries the beginning of the action of cloth 60 to be opportunity that the upper end of cloth conveying teeth 34 is when being in position 401E.That is, cloth conveying teeth 34 carries beginning opportunity of the action of cloth 60 after cloth conveying teeth 34 is above work feed perforation 19 is projected into.Therefore, in movement locus 401, relative to cloth conveying teeth 34 from work feed perforation 19 outstanding opportunity, that the conveying action of cloth conveying teeth 34 starts opportunity is more late than the situation of movement locus 101.In movement locus 401, cloth conveying teeth 34 carries the end of the action of cloth 60 to be opportunity that the upper end of cloth conveying teeth 34 is when being in position 401F.That is, cloth conveying teeth 34 is carried before the end of the action of cloth 60 drops to the below of needle plate 15 opportunity above needle plate 15 in the upper end of cloth conveying teeth 34.Therefore, in movement locus 401, drop to from the top of needle plate 15 relative to the upper end of cloth conveying teeth 34 opportunity of the below of needle plate 15, the conveying release of cloth conveying teeth 34 wants Zao than the situation of movement locus 101 opportunity.

Movement locus 101,201,301,401 respective part length be in the longitudinal direction in above needle plate 15 are identical.That is, the amount of movement of upper end on the fore-and-aft direction of the upper side oscillation of needle plate 15 of cloth conveying teeth 34 is all identical in arbitrary movement locus.The amount of movement of upper end on the fore-and-aft direction of the upper side oscillation of needle plate 15 of cloth conveying teeth 34 is work feed pitches of cloth 60.Therefore, cloth conveying teeth 34 when according to arbitrary track action in movement locus 101,201,301,401, all with identical work feed pitch conveying cloth 60.Sewing machines 1 and cloth conveying teeth 34 are given prominence to from work feed perforation 19 and are independently carried cloth 60 with identical work feed pitch with the front and back position submerged.When the rotary speed of the output shaft of main motor 13 is identical, in movement locus 201,301,401, the time of cloth conveying teeth 34 movement is in the longitudinal direction shorter than the situation of movement locus 101.With cloth conveying teeth 34 according to compared with during movement locus 101 action, cloth conveying teeth 34 according to movement locus 201,301,401 action time, Sewing machines 1 starts in conveying action the rotating speed improving the driving shaft 24 of work feed motor 23 between opportunity and conveying release opportunity.Therefore, Sewing machines 1 is according to can with identical work feed pitch conveying cloth 60 during arbitrary track action in movement locus 101,201,301,401.In addition, when cloth conveying teeth 34 is according to movement locus 401 action, driving shaft 24 starts rotating ratio cloth conveying teeth 34 between opportunity and conveying release opportunity according to wanting fast when movement locus 201,301 action in conveying action.

The cloth 60 of an example of the cloth made as Sewing machines 1 is described with reference to Fig. 3.Cloth 60 comprises thin cloth portion 61, thick cloth portion 62 and stage portion 63.Thin cloth portion 61 is parts of piece of cloth material.Thick cloth portion 62 is parts of two pieces of cloth overlaps.The cloth in thick cloth portion 62 is thick, and to be greater than the cloth in thin cloth portion 61 thick.Stage portion 63 is the coupling parts between the upper surface in thin cloth portion 61 and the rear surface in thick cloth portion 62.

The electrical structure of Sewing machines 1 is described with reference to Fig. 7.The control device 30 of Sewing machines 1 has CPU44.CPU44 is responsible for the control to Sewing machines 1.CPU44 is connected with ROM49, RAM46, storage device 47 and I/O interface (hereinafter referred to as I/O) 48 by bus.ROM49 stores the program etc. for performing work feed process described later (with reference to Figure 10), movement locus setting process (with reference to Figure 11) etc.RAM46 stores in order to the various values needed for performing a programme temporarily.Storage device 47 stores the data of work feed tables of data 80 (with reference to Fig. 8) described later etc. and non-volatile storage device of various value.I/O48 is connected with pedal 22 and action button 6.CPU44 obtains direction of operating and the operational ton of pedal 22.CPU44 obtains the operation instruction of operator from action button 6.I/O48 is connected with drive circuit 51 ~ 53.Drive circuit 51 is for driving display part 11.CPU44 is to drive circuit 52 input torque command signal.Drive circuit 52 drives main motor 13 according to torque instruction signal.Sewing machines 1 has main encoder 55.Main encoder 55 is for detecting anglec of rotation phase place and the rotary speed of the output shaft of main motor 13.Main encoder 55 exports the anglec of rotation phase place of the output shaft of main motor 13 and the testing result of rotary speed to I/O48.CPU44 inputs work feed drive singal to drive circuit 53.Work feed drive singal is pulse signal.Drive circuit 53 drives work feed motor 23 according to work feed drive singal.Sewing machines 1 has work feed encoder 56.Work feed encoder 56 is for detecting anglec of rotation phase place and the rotary speed of the driving shaft 24 of work feed motor 23.Work feed encoder 56 exports the anglec of rotation phase place of the driving shaft 24 of work feed motor 23 and the testing result of rotary speed to I/O48.

With reference to Fig. 8, Fig. 9, the work feed tables of data 80 that storage device 47 stores is described.Work feed tables of data 80 is the work feed of the storage in combination data 501 ~ 504,511 ~ 514,521 ~ 524 of movement locus (pattern A ~ pattern D) that formed of the corresponding and front and back position (front side, center side, rear side) of cloth conveying teeth 34 that submerge outstanding from work feed perforation 19 and cloth conveying teeth 34 respectively.Pattern A refers to movement locus 101 (with reference to Fig. 6).Equally, pattern B refers to movement locus 201, and pattern C refers to movement locus 301, and pattern D refers to movement locus 401.Work feed data 501 ~ 504 are the data for the front side reciprocally swinging making cloth conveying teeth 34 in work feed perforation 19.Work feed data 511 ~ 514 are for making cloth conveying teeth 34 in the data of the center side reciprocally swinging of work feed perforation 19.Work feed data 521 ~ 524 are the data for the rear side reciprocally swinging making cloth conveying teeth 34 in work feed perforation 19.The corresponding pattern A of work feed data 501,511,521.The corresponding pattern B of work feed data 502,512,522.The corresponding pattern C of work feed data 503,513,523.The corresponding pattern D of work feed data 504,514,524.Work feed data 501 ~ 504,511 ~ 514,521 ~ 524 form same data.In order to avoid repeat specification, only work feed data 502 are described below.As shown in Figure 9, upper shaft angle and cloth pushing shaft angular correlation get up by work feed data 502.Upper shaft angle is the anglec of rotation phase place of the output shaft of main motor 13.Work feed shaft angle is the anglec of rotation phase place of the driving shaft 24 of work feed motor 23.In fig .9, work feed shaft angle be expressed as θ 0, θ 1, θ 2, θ 359, θ 360.Actual work feed shaft angle is the angle in the scope of 20 ° ~ 50 ° angularly β (with reference to Fig. 4).Be changed to 360 ° of periods at upper shaft angle from 0 °, work feed shaft angle makes a round trip in the scope of angle beta.That is, the output shaft of main motor 13 revolves period of turning around, and driving shaft 24 reciprocating rotation once, carry once by cloth conveying teeth 34 by cloth 60.When main motor 13 makes output shaft revolve to turn around, eedle 8 makes a pin.

With reference to Fig. 3 ~ Fig. 6, Figure 10 ~ Figure 14, the work feed process performed by CPU44 and movement locus setting process are described.In work feed process (with reference to Figure 10), Sewing machines 1 is according to front and back position, the stitch mode of Sewing machines 1, the movement locus of cloth conveying teeth 34 of operator by the cloth conveying teeth 34 selected by movement locus setting process (with reference to Figure 11), and conveying cloth 60 is made.Sewing machines 1 starts to make from the fabric end of the rear side in thin cloth portion 61.When the power supply of Sewing machines 1 is connected, CPU44 performs work feed process.

CPU44 judges that whether operator have input the instruction (S1) of set action track by action button 6.Before operator inputs the instruction of set action track by action button 6 (S1: no), CPU44 is in holding state.When operator have input the instruction of set action track by action button 6 (S1: yes), CPU44 performs an action track setting process and set action track (S2).

As shown in figure 11, in movement locus setting process, CPU44 shows the option (S11) of the front and back position of cloth conveying teeth 34 on display part 11.Such as, as shown in figure 12, CPU44 shows option namely front side, center side and the rear side of position that cloth conveying teeth 34 is outstanding from work feed perforation 19 and submerge on display part 11.Operator observes display part 11 while operate action button 6, selects the front and back position of cloth conveying teeth 34.CPU44 is by judging whether action button 6 has the input of the front and back position of cloth conveying teeth 34 and judge whether the selection (S13) of the front and back position to cloth conveying teeth 34.CPU44 (S13: no) before being judged as the selection to the front and back position of cloth conveying teeth 34 is in holding state.When there being the selection to the front and back position of cloth conveying teeth 34 (S13: yes), CPU44 accepts the front and back position (S15) of the cloth conveying teeth 34 selected by operator.

CPU44 accepts the setting (S17) to the stitch mode of Sewing machines 1.Such as, CPU44 shows the option of the stitch mode of Sewing machines 1 i.e. general mode and thick thing pattern on display part 11.Operator operates action button 6 and selects general mode or thick thing pattern.CPU44 accepts the setting of the stitch mode selected by operator.CPU44 judges whether the stitch mode accepted in S17 is general mode (S19).When the stitch mode that CPU44 accepts in S17 is general mode (S19: yes), CPU44 shows the option (S21) with the movement locus of the cloth conveying teeth 34 of general mode action on display part 11.The stitch mode of Sewing machines 1 is set as general mode by performing S19 and S21 by CPU44.Such as, as shown in figure 13, CPU44 shows option i.e. the movement locus 101,201 (S21) of the movement locus of the cloth conveying teeth 34 under general mode on display part 11.Operator observes display part 11 while operate action button 6, selects arbitrary movement locus wherein in two kinds of movement locuses 101,201.CPU44 makes process proceed to S23.When the stitch mode that CPU44 accepts in S17 is thick thing pattern (S19: no), CPU44 shows the option (S22) with the movement locus of the cloth conveying teeth 34 of thick thing Modal action on display part 11.The stitch mode of Sewing machines 1 is set as thick thing pattern by performing S19 and S22 by CPU44.Such as, as shown in figure 14, CPU44 shows option i.e. the movement locus 201,301,401 (S22) of the movement locus of the cloth conveying teeth 34 under thick thing pattern on display part 11.Operator observes display part 11 while operate action button 6, selects arbitrary movement locus wherein in three kinds of movement locuses 201,301,401.CPU44 makes process proceed to S23.

As shown in figure 11, CPU44 judges whether the selection (S23) of the movement locus to cloth conveying teeth 34.CPU44 (S23: no) before being judged as the selection to movement locus is in holding state.When there being the selection to the movement locus of cloth conveying teeth 34 (S23: yes), CPU44 accepts the movement locus (S25) of the cloth conveying teeth 34 selected by operator.That is, CPU44 accepts the movement locus having selection instruction to input by action button 6 in the movement locus of the cloth conveying teeth 34 corresponding with the stitch mode of Sewing machines 1.The setting process of CPU44 tenth skill track, and make process proceed to S3 (with reference to Figure 10).

As shown in Figure 10, CPU44 reads the work feed data (S3) corresponding with the front and back position of the cloth conveying teeth 34 accepted in the S15 of movement locus setting process, the stitch mode accepted in the S17 of movement locus setting process and the movement locus of cloth conveying teeth 34 that accepts in the S25 of movement locus setting process with reference to work feed tables of data 80 (with reference to Fig. 8).Such as, the front and back position (S15) of front side as cloth conveying teeth 34 is accepted at CPU44, accept general mode as stitch mode (S17, S19: yes) and when accepting the movement locus of movement locus 201 (pattern B) as cloth conveying teeth 34 (S25), CPU44 obtains work feed data 502 (with reference to Fig. 9) (S3).

CPU44 judges whether the operation (S4) to pedal 22.Operator's pushes pedals 22, thus CPU44 is judged as driving main motor 13 to the operation of pedal 22.When there being the operation to pedal 22 (S4: yes), CPU44 obtains upper shaft angle (S5) according to the output of main encoder 55.CPU44, with reference to the work feed data obtained in S3, obtains the work feed shaft angle (S6) corresponding with the upper shaft angle obtained in S5.The work feed shaft angle (S7) that CPU44 makes driving shaft 24 turn to by driving work feed motor 23 to obtain in S6.CPU44 makes process turn back to S4.During having the operation to pedal 22, CPU44 monitors the work feed shaft angle that work feed encoder 56 exports, by make driving shaft 24 centered by the second turned position (with reference to Fig. 4) in the scope of angle beta the mode of reciprocating rotation drive work feed motor 23.Therefore, the front side reciprocally swinging of cloth conveying teeth 34 in work feed perforation 19.CPU44 monitors the upper shaft angle that main encoder 55 exports and the work feed shaft angle that work feed encoder 56 exports, in the mode making the relation of upper shaft angle and work feed shaft angle become the relation shown in work feed data 502, and the main motor 13 of synchronous driving and work feed motor 23.Therefore, cloth conveying teeth 34 is according to movement locus 201 action ground reciprocally swinging.Along with the rotation of the output shaft of main motor 13, eedle 8 and thread take-up tension lever 9 move up and down linkedly with cloth pushing table 33.

When operation not to pedal 22 in the process at S4 (S4: no), CPU44 makes process turn back to S1.CPU44, when being judged as the operation not to pedal 22, stops the driving to main motor 13.When main motor 13 stops driving, work feed motor 23 stops driving.When the dump of Sewing machines 1, work feed process terminates.

As shown in Figure 4, the cloth conveying teeth 34 outstanding from work feed perforation 19 rearward moves via position 201D (with reference to Fig. 6) from position 201C (with reference to Fig. 6), thus is clipped between cloth conveying teeth 34 and press section 25 in thin cloth portion 61.Be positioned at period above needle plate 15 in the upper end of cloth conveying teeth 34, eedle 8 does not thrust cloth 60.Cloth conveying teeth 34 moves towards position 201A toward rear, thus the thin cloth portion 61 be between cloth conveying teeth 34 and press section 25 rearward moves.Through position 201A (with reference to Fig. 6) and the cloth conveying teeth 34 dropped to below needle plate 15 moves period to position 201B, eedle 8 runs through thin cloth portion 61.The upper thread penetrated in eedle 8 runs through thin cloth portion 61.Upper thread is interwoven in the bottom line of drawing from shuttle mechanism.Thread take-up tension lever 9 mentions the upper thread running through thin cloth portion 61.Therefore, Sewing machines 1 forms needle tracking in thin cloth portion 61.

When Sewing machines 1 starts the fabric end of the rear side making thin cloth portion 61, the fabric end in thin cloth portion 61 is sent between cloth conveying teeth 34 and press section 25 by operator.Front side in work feed perforation 19 give prominence to and the cloth conveying teeth 34 that submerges easily prior to Contact Thin cloth portion, press section 25 61.The below of the fabric end in thin cloth portion 61 to introduction part 28 is carried by cloth conveying teeth 34.Therefore, the fabric end of cloth 60 can easily import between cloth conveying teeth 34 and presser feet 17 by Sewing machines 1.

In movement locus 201, relative to cloth conveying teeth 34 from work feed perforation 19 outstanding opportunity, that the conveying action of cloth conveying teeth 34 starts opportunity is more late than the situation of movement locus 101.That is, the upper end of cloth conveying teeth 34 is after rising to the position 201D (with reference to Fig. 6) be in above needle plate 15, just rearward moves and transporting thin cloth portion 61.In the upper end of cloth conveying teeth 34 between position, the lower direction 201D rising stage of needle plate 15, thread take-up tension lever 9 mentions upper thread.The cloth conveying teeth 34 moving to position 201D rearward transporting thin cloth portion 61 after thread take-up tension lever 9 fully mentions upper thread.The spacing distance being sewn to the thread take-up tension lever 9 of upper thread in thin cloth portion 61 and rising becomes large.Therefore, Sewing machines 1 can make upper thread good relative to the elasticity in thin cloth portion 61.

When operator stops the operation to pedal 22 (S4: no), CPU44 stops the driving to main motor 13, work feed motor 23.Such as, entered into before between introduction part 28 and cloth conveying teeth 34 in the stage portion 63 of the cloth 60 of rearward movement, operator stops the operation to pedal 22.

With reference to Fig. 5, Fig. 6, Figure 10, Figure 11, illustrate that CPU44 performs work feed process and makes the action in transporting thin cloth portion 61 and thick cloth portion 62 according to movement locus 301 action of the rear side of cloth conveying teeth 34 in work feed perforation 19.Thin cloth portion 61 maintains the state be configured between cloth conveying teeth 34 and press section 25.Below, in order to avoid repeat specification, simplify the explanation of part to work feed process.In the S1 of Figure 10, operator operates action button 6, the track setting process (S2) thus CPU44 performs an action.

As shown in figure 11, CPU44 shows the option (S11) of the front and back position of the cloth conveying teeth 34 of reciprocally swinging on display part 11.Operator operates action button 6, and the rear side in input work feed perforation 19 replaces front side in work feed perforation 19 and position that is outstanding as the cloth conveying teeth 34 of reciprocally swinging and that submerge.CPU44 accepts the position (S13: be, S15) of rear side as the cloth conveying teeth 34 of reciprocally swinging.

Operator operates action button 6 and selects thick thing pattern as the stitch mode of Sewing machines 1, and CPU44 accepts the setting (S17) of thick thing pattern.CPU44 on display part 11 display action track 201,301,401 as the option (S22) of the movement locus of cloth conveying teeth 34.Operator operates action button 6, selects movement locus 301 (pattern C) to replace movement locus 201 (pattern B).CPU44 accepts movement locus 301 (S23: be, S25).As shown in Figure 10, CPU44 obtains work feed data 523 (S3) with reference to work feed tables of data 80 (with reference to Fig. 8).

CPU44 synchronously drives main motor 13 and work feed motor 23 based on operator to the operation of pedal 22, and transporting thin cloth portion 61 also carries out making (S4: be, S5 ~ S7).CPU44, during having the operation to pedal 22, monitors the work feed shaft angle that work feed encoder 56 exports, and drives work feed motor 23 in the mode making driving shaft 24 rotate in the scope of angle γ centered by the 3rd turned position (with reference to Fig. 5).Therefore, the rear side reciprocally swinging of cloth conveying teeth 34 in work feed perforation 19.CPU44 monitors the upper shaft angle that main encoder 55 exports and the work feed shaft angle that work feed encoder 56 exports, and synchronously drives main motor 13 and work feed motor 23 in the mode making the relation of upper shaft angle and work feed shaft angle become the relation of the anglec of rotation phase place that work feed data 523 store.Therefore, work feed 34 is according to movement locus 301 action ground reciprocally swinging.

As shown in Figure 5, Figure 6, cloth conveying teeth 34 according to movement locus 301 action rear side in work feed perforation 19 outstanding and submerge.The cloth conveying teeth 34 that rear side in work feed perforation 19 swings is positioned at the below of extended portion 27.Cloth conveying teeth 34 moves to position 301D from position 301C (with reference to Fig. 6).Cloth 60 moves to the position that stage portion 63 abuts with introduction part 28.Now, even if cloth conveying teeth 34 clips thin cloth portion 61 and rearward moves while rise between it and extended portion 27, the stage portion 63 being in the front of extended portion 27 also not easily rises.Therefore, when in thin cloth portion 61, the stage portion 63 of together rearward movement enters between press section 25 and cloth conveying teeth 34, not easily rise in press section 25.That is, between press section 25 and cloth 60, not easily gap is produced.The cloth conveying teeth 34 swung can not skid relative to cloth 60.Therefore, Sewing machines 1 also can reliably carry cloth 60 when stage portion 63 being imported between presser feet 17 and cloth conveying teeth 34.Along with CPU44 continues the main motor 13 of synchronous driving and work feed motor 23, cloth conveying teeth 34 carries thick cloth portion 62 according to movement locus 301 action.Sewing machines 1 is carried thick cloth portion 62 and is made.After Sewing machines 1 is carried thick cloth portion 62 and made, operator stops the operation to pedal 22.

The conveying of movement locus 301 terminates opportunity and wants Zao than the situation of movement locus 101.Therefore, the lower end of eedle 8 when cloth conveying teeth 34 terminates the opportunity of conveying cloth 60 is in the position higher than the situation of movement locus 101.Therefore, when cloth conveying teeth 34 carries thick cloth portion 62, when cloth conveying teeth 34 carries end opportunity of the action of cloth 60, eedle 8 does not thrust thick cloth portion 62 yet.That is, before the mobile end in thick cloth portion 62, eedle 8 does not thrust thick cloth portion 62.Sewing machines 1 can prevent eedle 8 from bending, fractureing.Therefore, Sewing machines 1 can prevent quality of sewing to be deteriorated.

With reference to Fig. 3, Fig. 6, Figure 10, Figure 11, illustrate that CPU44 performs work feed process and makes cloth conveying teeth 34 carry the action in thick cloth portion 62 according to movement locus 401 action in the center side of work feed perforation 19.Thick cloth portion 62 maintains the state be configured between cloth conveying teeth 34 and press section 25.In the S1 of Figure 10, operator operates action button 6, the track setting process (S2) thus CPU44 performs an action.

As shown in figure 11, CPU44 accepts the position (S13: be, S15) of giving prominence to and submerging of center side as cloth conveying teeth 34, accepts thick thing pattern as stitch mode (S17, S19: no).CPU44 accepts the movement locus (S25) that movement locus 401 (pattern D) will be formed as cloth conveying teeth 34.As shown in Figure 10, CPU44 obtains work feed data 514 (S3) with reference to work feed tables of data 80 (with reference to Fig. 8).

CPU44, during having operator to the operation of pedal 22, monitors the work feed shaft angle that work feed encoder 56 exports, and drives work feed motor 23 in the mode making driving shaft 24 rotate in the scope of angle [alpha] centered by the first turned position (with reference to Fig. 3).Therefore, cloth conveying teeth 34 is at the center side reciprocally swinging of work feed perforation 19.CPU44 monitors the upper shaft angle that main encoder 55 exports and the work feed shaft angle that work feed encoder 56 exports, and synchronously drives main motor 13 and work feed motor 23 in the mode making the relation of upper shaft angle and work feed shaft angle become the relation of the anglec of rotation phase place that work feed data 514 store.Therefore, cloth conveying teeth 34 is according to movement locus 401 action ground reciprocally swinging.

In movement locus 401, same with movement locus 201, relative to cloth conveying teeth 34 from work feed perforation 19 outstanding opportunity, that the conveying action of cloth conveying teeth 34 starts opportunity is more late than the situation of movement locus 101.At cloth conveying teeth 34, from the lower direction position 401E (with reference to Fig. 6) of needle plate 15, between the rising stage, thread take-up tension lever 9 mentions upper thread.After thread take-up tension lever 9 fully mentions upper thread, cloth conveying teeth 34 rearward carries thick cloth portion 62.Therefore, Sewing machines 1 can make upper thread good relative to the elasticity in thick cloth portion 62.

Cloth conveying teeth 34 starts the opportunity of rearward movement after cloth conveying teeth 34 rises to the position 401E be in above needle plate 15.Cloth 60 is being clipped in after between it and press section 25 by cloth conveying teeth 34 firmly that rise to position 401E, moves and carry thick cloth portion 62 to position 401F.Cloth conveying teeth 34 can not skid relative to thick cloth portion 62.Therefore, Sewing machines 1 can reliably carry cloth 60.

In movement locus 401, same with movement locus 301, drop to from the top of needle plate 15 relative to the upper end of cloth conveying teeth 34 opportunity of the below of needle plate 15, the conveying release of cloth conveying teeth 34 wants Zao than the situation of movement locus 101 opportunity.Therefore, before the mobile end in thick cloth portion 62, eedle 8 does not thrust thick cloth portion 62.Sewing machines 1 can prevent eedle 8 from bending, fractureing.Therefore, Sewing machines 1 can prevent quality of sewing to be deteriorated.

As mentioned above, Sewing machines 1 can change by changing the slewing area of driving shaft 24 position that cloth conveying teeth 34 is outstanding from work feed perforation 19 and submerge in the longitudinal direction.By the front side reciprocally swinging of cloth conveying teeth 34 in work feed perforation 19, the fabric end in thin cloth portion 61 can easily import between press section 25 and cloth conveying teeth 34 by Sewing machines 1.By the rear side reciprocally swinging of cloth conveying teeth 34 in work feed perforation 19, Sewing machines 1 also can reliably carry cloth 60 when stage portion 63 being imported between press section 25 and cloth conveying teeth 34.

CPU44 performs an action track setting process.Operator inputs by action button 6 front and back position that cloth conveying teeth 34 is outstanding from work feed perforation 19 and submerge.CPU44 accepts the front and back position (S15) of the cloth conveying teeth 34 that operator is inputted by action button 6.In work feed process, CPU44 obtains the work feed data (S3) corresponding with the front and back position of the cloth conveying teeth 34 that CPU44 accepts in S15.That is, input by action button 6 by means of only by operator, the slewing area that namely Sewing machines 1 changes driving shaft 24 becomes the position desired by operator with the front and back position of the cloth conveying teeth 34 making reciprocally swinging.Operator, when changing the front and back position of cloth conveying teeth 34 of reciprocally swinging, does not need temporarily pull down driving shaft 24 from connecting rod 39 and change the relation of the anglec of rotation phase place of the output shaft of driving shaft 24 and main motor 13.Therefore, Sewing machines 1 easily can change the front and back position that cloth conveying teeth 34 is outstanding from work feed perforation 19 and submerge.

Cloth conveying teeth 34 is when according to arbitrary movement locus action in movement locus 101,201,301,401, and cloth conveying teeth 34 amount of movement in the longitudinal direction outstanding from work feed perforation 19 is all constant.That is, Sewing machines 1 and the cloth conveying teeth 34 of the reciprocally swinging work feed pitch that independently maintains cloth 60 from work feed perforation 19 front and back position that is outstanding and that submerge is constant.Therefore, even if the position that is outstanding and that submerge that Sewing machines 1 changes cloth conveying teeth 34 also can make the stitch length being formed at cloth 60 constant.

When work feed motor 23 drives, connecting rod 39 rotates centered by driving shaft 24.With the rotation of driving shaft 24, move back and forth before and after the linking part between intermediate bar 38 and swing arm 36.Swing arm 36 is reciprocating rotation centered by bolster 37, moves back and forth before and after cloth conveying teeth 34.Therefore, the reciprocating rotation of driving shaft 24 is converted to moving back and forth on the fore-and-aft direction of cloth conveying teeth 34 by Sewing machines 1.When driving shaft 24 reciprocating rotation one time, make a round trip before and after cloth pushing table 33.Switch the rotation direction of driving shaft 24 by means of only work feed motor 23, namely Sewing machines 1 changes the moving direction of cloth pushing table 33.Therefore, Sewing machines 1 can make to move back and forth before and after cloth conveying teeth 34 with simple structure.

The movement locus that operator selects cloth conveying teeth 34 to be formed in movement locus 101,201,301,401, and inputted by action button 6.CPU44 accepts the selection to movement locus (S25) inputted by action button 6.CPU44 by the movement locus of cloth conveying teeth 34 being changed to the arbitrary movement locus in movement locus 101,201,301,401, and change relative to cloth conveying teeth 34 move up and down, at least one opportunity that the conveying action of cloth conveying teeth 34 starts in opportunity and conveying release opportunity.Therefore, Sewing machines 1 can perform the work feed action corresponding to the thickness of the cloth 60 carried.

The movement locus that CPU44 is inputted by action button 6 according to operator and change the movement locus (S25) that cloth conveying teeth 34 will be formed.Therefore, the movement locus that cloth conveying teeth 34 will be formed can be changed to the movement locus desired by operator by Sewing machines 1.

CPU44 shows multiple movement locus (S21, S22) according to the stitch mode of Sewing machines 1 on display part 11.Operator selects the arbitrary movement locus in the various motion track shown by display part 11, and is inputted by action button 6.Therefore, Sewing machines 1 does not accept the movement locus of the cloth conveying teeth 34 not corresponding with the stitch mode set, therefore, it is possible to improve the convenience of the movement locus changing cloth conveying teeth 34.

When operator selects the stitch mode of general mode as Sewing machines 1 (S19: yes), CPU44 accepts the arbitrary movement locus (S25) in movement locus 101,201.When operator selects thick thing pattern (S19: no), CPU44 accepts the arbitrary movement locus (S25) in movement locus 201,301,401.In movement locus 401, relative to cloth conveying teeth 34 from work feed perforation 19 outstanding opportunity, that the conveying action of cloth conveying teeth 34 starts opportunity is more late than the situation of movement locus 101.That is, when operator have selected thick thing pattern and have selected movement locus 401, compared with when have selected general mode with operator and have selected movement locus 101, the conveying action of cloth conveying teeth 34 is delayed the opportunity that starts automatically.When cloth conveying teeth 34 carries thick cloth portion 62, thick cloth portion 62 is also clipped between it and press section 25 by cloth conveying teeth 34 firmly.Cloth conveying teeth 34 can not skid relative to thick cloth portion 62.Sewing machines 1 reliably can carry thick cloth portion 62.Therefore, Sewing machines 1 can prevent quality of sewing to be deteriorated.

In movement locus 301,401, relative to the upper end of cloth conveying teeth 34 drop to above needle plate 15 opportunity below needle plate 15, the conveying release of cloth conveying teeth 34 wants Zao than the situation of movement locus 101,201 opportunity.When operator have selected thick thing pattern and have selected the arbitrary movement locus in movement locus 301,401 (S25), compared with when have selected general mode with operator, the conveying release of cloth conveying teeth 34 shifts to an earlier date opportunity automatically.Before cloth conveying teeth 34 carries cloth 60 end, eedle 8 does not thrust cloth 60.Therefore, Sewing machines 1 can prevent quality of sewing to be deteriorated.

Cloth conveying teeth 34 according to movement locus 201,301,401 action time, the rotating speed of driving shaft 24 accelerated by work feed motor 23.Therefore, cloth conveying teeth 34 carries work feed pitch during cloth 60 with cloth conveying teeth 34 according to comparing not change during movement locus 101 action according to movement locus 201,301,401 action.When the thick change of the cloth of cloth 60, the stitch mode that CPU44 accepts changes.Cloth conveying teeth 34 can complete rearward movement when not changing the conveying capacity of conveying cloth 60.That is, even if the movement locus that cloth conveying teeth 34 is formed changes, the interval (length of needle tracking) of making is also constant.Therefore, Sewing machines 1 also can maintain quality of sewing when the thick inconstant cloth 60 of conveying cloth.

Work feed perforation 19 is examples for opening portion of the present invention.Upper and lower conveying mechanism 45 is examples for knee-action mechanism of the present invention.Work feed motor 23 is examples for motor of the present invention.Horizontal transport agency 31 is examples for power conversion mechanism of the present invention.Connecting rod 39 is examples for the first arm of the present invention.Intermediate bar 38 is examples for the second arm of the present invention.Swing arm 36 is examples for the 3rd arm of the present invention.Action button 6 is examples for the first input part of the present invention, the second input part.Thick thing pattern is an example of first mode of the present invention.General mode is an example of the second pattern of the present invention.

The CPU44 performing S7 is an example of control part of the present invention.Perform the CPU44 of S3 be slewing area changing unit of the present invention, opportunity changing unit an example.The CPU44 performing S15 is an example of the first receiving portion of the present invention.The CPU44 performing S25 is an example of the second receiving portion of the present invention.The CPU44 performing S17 is an example of the 3rd receiving portion of the present invention.The CPU44 performing S19, S21, S22 is an example of configuration part of the present invention.

The present invention is not limited to above-mentioned embodiment.Sewing machines 1 can be set as in front side, center side, rear side any position by front and back position that is cloth conveying teeth 34 is outstanding from work feed perforation 19 and that submerge, but the spacing distance between center on the fore-and-aft direction of the center that such as also can set on the fore-and-aft direction of cloth conveying teeth 34 hunting range and work feed perforation 19.Operator, while observe display part 11, inputs the spacing distance of expectation by button 6.

Sewing machines 1 is after accepting the cloth conveying teeth 34 and front and back position that submerge outstanding from work feed perforation 19 (S15), accept the setting (S17) to stitch mode, finally accept the setting (S25) to movement locus, but such as also can accept stitch mode after accepting movement locus, finally accept the front and back position of cloth conveying teeth 34.

Stitch mode can be set as the arbitrary pattern in general mode and thick thing pattern by Sewing machines 1, but such as also stitch mode can be set as general mode, thin thing pattern, thick thing pattern.Operator selects thick thing pattern when the cloth that sewing fabric is thick, selects thin thing pattern when the thick thinner cloth of sewing fabric, at other time, select general mode.

Claims

1. a Sewing machines, it comprises:

Cloth pushing table (33), cloth conveying teeth (34) is supported on this cloth pushing table;

Needle plate (15), it is provided with the opening portion (19) of giving prominence to for above-mentioned cloth conveying teeth and submerging;

Knee-action mechanism (45), it makes above-mentioned cloth pushing table move up and down;

Motor (23), it makes driving shaft (24) reciprocating rotation within the specific limits;

Power conversion mechanism (31), the reciprocating rotation of above-mentioned driving shaft is converted to above-mentioned cloth pushing table moving back and forth in the horizontal direction by it; And

Control part (44), moving up and down that itself and above-mentioned cloth pushing table carry out under above-mentioned knee-action mechanism acts on correspondingly controls the driving of said motor, and makes above-mentioned drive shaft turns;

The feature of this Sewing machines (1) is, comprising:

First receiving portion (44), it accepts the changed content of the slewing area of the above-mentioned driving shaft of change that the first input part (6) inputs; And

Slewing area changing unit (44), its changed content accepted according to above-mentioned first receiving portion, is maintaining the slewing area changing above-mentioned driving shaft under the constant state of the above-mentioned cloth conveying teeth amount of movement in the horizontal direction given prominence to from above-mentioned opening portion;

Above-mentioned control part controls the driving of said motor in the mode making above-mentioned driving shaft and rotate in the slewing area that above-mentioned slewing area changing unit changes.

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

Above-mentioned power conversion mechanism comprises:

First arm (39), an end of this first arm and above-mentioned driving shaft are linked to the top ends of this driving shaft orthogonally;

Second arm (38), the mode that an end of this second arm can swing with this second arm is connected with the other end contrary with an end of above-mentioned first arm of above-mentioned first arm; And

3rd arm (36), the mode that one end of the 3rd arm can swing with the 3rd arm is connected with the other end contrary with an end of above-mentioned second arm of above-mentioned second arm, and the other end contrary with an end of above-mentioned 3rd arm of the 3rd arm and above-mentioned cloth pushing table are connected.

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

This Sewing machines comprises:

Second receiving portion (44), the changed content on it accepts that the second input part (6) inputs change specific opportunity, this specific opportunity be relative to the action in the vertical direction of above-mentioned cloth pushing table, above-mentioned cloth pushing table at least one opportunity in the beginning opportunity and end opportunity of horizontal direction action; And

On changing unit on opportunity (44), its changed content accepted according to above-mentioned second receiving portion changes specific opportunity;

Above-mentioned control part controls the driving of said motor in the mode making above-mentioned driving shaft and rotate under the specific opportunity that above-mentioned opportunity, changing unit changed.

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

This Sewing machines comprises:

3rd receiving portion (44), it accepts arbitrary pattern stitch mode being set as first mode and being different from the second pattern of above-mentioned first mode; And

Configuration part (44), above-mentioned stitch mode is set as the pattern that above-mentioned 3rd receiving portion accepts by it;

Operator selects the pattern of the movement locus of the above-mentioned cloth conveying teeth corresponding to the pattern set by above-mentioned configuration part to input to above-mentioned second input part in the pattern of the movement locus of multiple above-mentioned cloth conveying teeth;

The specific opportunity of the pattern of the movement locus of above-mentioned cloth conveying teeth is different.

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

Above-mentioned opportunity, changing unit changed as follows: compared with situation when setting above-mentioned second pattern with above-mentioned configuration part, when above-mentioned configuration part sets above-mentioned first mode, above-mentioned cloth conveying teeth to horizontal direction action, delay opportunity to the beginning of the action risen on the position that above-mentioned opening portion is outstanding relative to the position of above-mentioned cloth conveying teeth from the below being in above-mentioned needle plate.

6. Sewing machines according to claim 5, is characterized in that,

Above-mentioned opportunity, changing unit changed as follows: compared with situation when setting above-mentioned second pattern with above-mentioned configuration part, when above-mentioned configuration part sets above-mentioned first mode, above-mentioned cloth conveying teeth to horizontal direction action, end opportunity of action of declining from the position outstanding from above-mentioned opening portion to the position of the below being in above-mentioned needle plate relative to above-mentioned cloth conveying teeth in advance.

7. Sewing machines according to claim 5, is characterized in that,

The mode of the rotating speed of the above-mentioned driving shaft when rotating speed of above-mentioned driving shaft when above-mentioned control part is to make above-mentioned configuration part set above-mentioned first mode sets above-mentioned second pattern higher than above-mentioned configuration part controls the driving of said motor.

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