CN1086277A - The automatic workpiece guiding device of Sewing machines - Google Patents

Abstract

The objective of the invention is to obtain rakish lock seaming.The present invention makes the certain various piece of curvature that the path marks off selvedge with the sewing edge, with various piece as between sewing area, in each interval, the needed reference position that is used for the selvedge detection of selvedge control is carried out in decision respectively, in advance with the length between pin number setting sewing area.And, in the sewing beginning, counting pin number is read the reference position of the sensor between the sewing area that this count value represents, according to selvedge detection position departing from (side-play amount and offset direction) sewing is moved to the direction with the cloth feeding direction quadrature with respect to this reference position.

Description

The automatic workpiece guiding device of Sewing machines

The present invention relates to the automatic workpiece guiding device of Sewing machines, near the selvedge of the sewing of particularly sewing during the position, change the automatic workpiece guiding device of the reference position of selvedge in proper order with the Sewing machines of control selvedge position according to the selvedge shape of sewing.

In the past, proposed all schemes that supplies the automatic workpiece guiding device of practical Sewing machines, these schemes are utilized the selvedge position of selvedge detecting sensor frontier inspection joint measurement material, are lockstitching a border from the sewing position of selvedge distance to a declared goal in the limit.

For example, the special automatic workpiece guiding device that divides clear 54-32389 gazette entry, this device be provided with detection to the detector of the direction skew of the moving direction quadrature of softness material (sewing), and in the face of above the separating plate and below be respectively equipped with claw, be respectively equipped with simultaneously the directional component of softness material to these claw extruding, detection signal according to this detector, driven motor rotating joint, make the directional component forward or reverse, the selvedge of the soft material of control always moves to appointed positions.

In addition, the automatic workpiece guiding device of special public clear 58-48199 gazette entry is provided with stopper device, selvedge checkout gear and feed control device, compare with eedle, the stopper device is arranged on than sewing needle and more is positioned at the cloth feeding direction upside, is used for preventing that the selvedge of sewing is to eating into direction (opposite direction of sewing) skew; The selvedge checkout gear is used for detecting the selvedge of sewing to the skew that breaks away from direction (sewing direction); Feed control device makes sewing, and direction moves to eating into, when the selvedge of sewing when breaking away from the direction skew, according to the detection signal of selvedge checkout gear, drive this feed control device, the selvedge of control sewing always moves to appointed positions.

As previously mentioned, in the automatic workpiece guiding device of public clear 54-32389 communique of spy and special public clear 58-48199 gazette entry, be set in appointed positions as the reference position of detecting the selvedge skew, so, when having only when the selvedge shape of sewing roughly linearly or radius of curvature substantially constant, could always lockstitch a border at the sewing position that from the selvedge position is distance to a declared goal.

But, owing to no matter the selvedge shape at the sewing that will lockstitch a border is to mix situation about forming or situation about being formed by the different multiple curve of radius of curvature in curved portion by straight line portion with curved portion, all the reference position is set in appointed positions, so, sewing the most suitable this reference position straight line portion or when having the curved portion of specific radius of curvature, can obtain the desirable seam width of doing, but, when making the curved portion that has beyond this certain radius of curvature, change owing to doing the size of seam width with radius of curvature, so the outward appearance of lock seaming is not good, perhaps lock seaming is thrown off.

The present invention addresses the above problem to put forward, its objective is the automatic workpiece guiding device that a kind of Sewing machines is provided, no matter the selvedge shape of sewing is straight line or the complicated shape that contains multiple curve, always can both keep appointment do the seam width, obtain the good lock seaming of outward appearance.

In order to achieve the above object, automatic workpiece guiding device according to the Sewing machines of claim 1, shown in the functional block diagram of Fig. 1, be provided with selvedge detector, offset calculator and sewing shifter, compare the upside that the selvedge detector is arranged on cloth feeding direction with eedle, be used for detecting the selvedge position of sewing; Offset calculator is obtained the side-play amount of the predefined reference position of selvedge position deviation of sewing according to the output of selvedge detector; The sewing shifter is used for making the selvedge of sewing to move to the direction with the cloth feeding direction quadrature, to eliminate the side-play amount of obtaining by offset calculator, in addition, also be provided with reference position data storage, sewing position detector and reference position change setting device, the data in advance of the reference position that reference position data memory serves handle is corresponding with the sewing position of sewing stores; The sewing position detector is used for detecting the sewing position at that time of sewing; Reference position change setting device resets the reference position according to the output of sewing position detector and the data of reference position data storage storage.

In having the automatic workpiece guiding device about the Sewing machines of claim 1 of said structure, the data in advance that detects the reference position of selvedge with corresponding being used for of sewing position of sewing is stored in the reference position data storage, and, the carrying out that follows sewing to handle, utilize the sewing position detector can detect the sewing position at that time of sewing, so reference position change setting device just resets and at that time the corresponding reference position of sewing position according to the data of the output of sewing position detector and the storage of reference position data storage.The result, offset calculator is just obtained the side-play amount of the selvedge position of sewing according to selvedge detector selvedge position of detecting and the reference position that resets, so the sewing shifter just makes the sewing selvedge move to the direction with the cloth feeding direction quadrature, to eliminate this side-play amount.

Like this, carrying out along with the sewing processing, order resets and at that time the corresponding reference position of sewing position, the sewing selvedge is moved to the direction with the cloth feeding direction quadrature, to eliminate the side-play amount of the sewing selvedge position of obtaining according to after changing reference position and selvedge position, so, data according to the reference position that resets, even the selvedge shape of sewing is to comprise the multiple curve that is made of different curvature radius and the complicated shape of straight line, what also always can keep appointment reliably does the seam width, thereby can carry out lock seaming attractive in appearance.

Below, with reference to the description of drawings embodiments of the invention.

Fig. 1 is the functional block diagram of expression formation of the present invention.

Fig. 2 is the front view with sewing machine for covering chain stitch of automatic workpiece guiding device.

Fig. 3 is the vertical view of automatic workpiece guiding device.

Fig. 4 is and the suitable figure of Fig. 3 that major part is amplified.

Fig. 5 is the vertical profile front view of major part.

Fig. 6 is the vertical profile front view that the major part of cloth mobile device is gone up in expression.

Fig. 7 is the expression amplification plan view of the major part of selvedge detecting sensor down.

Fig. 8 is the amplification plan view that the major part of selvedge detecting sensor is gone up in expression.

Fig. 9 is the amplification plan view that last cloth and following cloth is set to the major part of sewing position.

Figure 10 is the L-L line vertical profile side view along Fig. 8.

Figure 11 is the expression amplification front elevation of the major part of cloth mobile device down.

Figure 12 is the enlarged side view of following cloth mobile device.

Figure 13 is the part amplification oblique drawing of following cloth mobile device and fuel tank.

Figure 14 is along G-G line vertical profile front view among Fig. 7.

Figure 15 is along J-J line vertical profile front view among Fig. 7.

Figure 16 is the auxiliary amplification front elevation of going up the cloth mobile device.

Figure 17 is the mechanism map of automatic workpiece guiding device.

Figure 18 is a pie graph of going up selvedge testing agency.

Figure 19 is the pie graph of following selvedge testing agency.

Figure 20 is the block diagram of the control system of sewing machine for covering chain stitch and automatic workpiece guiding device.

Figure 21 is the concise and to the point flow chart of selvedge alignment control program.

Figure 22 is the concise and to the point flow chart of sewing with parameter setting processing controls program.

Figure 23 is the concise and to the point flow chart that the processing controls program is prepared in sewing.

Figure 24 is the concise and to the point flow chart of sewing processing controls program.

Figure 25 is a concise and to the point flow chart of going up the processing controls of Bu Bubian position probing.

Figure 26 is a concise and to the point flow chart of going up cloth side-play amount computing control.

Figure 27 is the concise and to the point flow chart of following Bu Bubian position probing processing controls.

Figure 28 is the concise and to the point flow chart that cloth side-play amount computing is down controlled.

Figure 29 is the part vertical view that the last cloth between the sewing area of going up cloth is described.

Figure 30 is that the data that explanation is gone up in the cloth parameter list constitute chart.

Present embodiment is the situation that applies the present invention to industrial sewing machine for covering chain stitch.M describes to sewing machine for covering chain stitch, and Sewing machines M is identical with sewing machine for covering chain stitch with general industrial, so, only make simple explanation.

Sewing machine for covering chain stitch M is installed in operation as shown in Figure 2 with on the workbench T, by sewing machine base 1, constitute with the cantilever 3 relative with base 1 that extends to left from this socle 2 at the upright socle 2 of the right-hand member of this base 1.On base 1, be provided with and make feed dog that following feed dog 8 moves up and down actuation mechanism (diagram slightly) and line wheel catcher (diagram is omited) etc. before and after actuation mechanism (diagram slightly) and the feed dog that moves forward and backward up and down.

In addition, on suspended wall 3, be provided with needle bar drive device and thread take-up tension lever driving mechanism etc., needle bar drive device is used for making the lower end can adorn eedle 4(referring to Figure 17) shank (diagram slightly) move up and down; Thread take-up tension lever (diagram slightly) driving mechanism is used for adjusting when shank moves up and down thread take-up tension lever is moved up and down.

On the sewing machine frame F of above-mentioned shank rear side, supporting depression bar moving up and down, presser feet 6(is installed referring to Fig. 4 in the lower end of this depression bar).This depression bar and the last feed dog 7(that makes cloth UW feeding are referring to Fig. 4) drive with solenoid 159(referring to Figure 20 with the described presser feet in back) be connected, this depression bar and last feed dog 7 relies on presser feets to drive retreating position after driving with solenoid 159 is converted to rising, in addition, when the driving of this solenoid 159 stops, being converted to the active position after the decline.

Therefore, actuation mechanism, needle bar drive device and thread take-up tension lever driving mechanism are driven by electrical motor of sewing machine 140 feed dog of this time feed dog 8 and last feed dog 7 up and down.In addition, following feed dog 8 according to the corresponding cloth feed amount of inclination by the work feed controller of the drive amount change of linear electromagnetic coil (diagram slightly), carry out front and back driving by actuation mechanism before and after the feed dog.Last feed dog 7 according to by last feed dog the corresponding cloth feed amount of gradient with the work feed controller of the amount of spin change of pulse motor (diagram slightly), carry out front and back driving by actuation mechanism before and after the feed dog.

Electrical motor of sewing machine 140 is arranged near the below of above-mentioned operation with workbench T, is installed on the operation post 9 of supporting work operations platform T.In addition, operation board 10 is installed on the sewing machine for covering chain stitch M, on this operation board 10, is provided with the needed a plurality of console switch of sewing operation.

Automatic workpiece guiding device 15 consists essentially of and is arranged on holding fabric swatch drive unit 16 and last cloth mobile device 17 and be located at the following cloth mobile device 18 of base 1 downside and control the auxiliary upward cloth mobile device 19 of cloth UW position auxiliaryly between base 1 and the cantilever 3, at first with reference to Fig. 2～Fig. 5 illustrate cloth UW and following cloth DW in the driving support that is arranged between cloth UW and the following cloth DW hold fabric swatch 16 hold fabric swatch drive unit 16.

Slightly rectangular substrate 25 is fixed on the above-mentioned base 1, this above substrate 25 front end the belt line that direction to the left and right extends be installed prop up fork supporting 26, the cloth platform 27 that holds that is made of slightly rectangular sheet material is configured in this straight line intersection supporting 26, and can move along left and right directions.

In the place ahead of Cheng Butai 27, utilize cantilever 28 to be fixed on the substrate 25 along the cloth platform conversion cylinder 143 that holds of left and right directions configuration, the front end of the piston rod 143a of this cylinder 143 be fixed on the drive rod 29 that holds on the cloth platform 27 and be connected.Therefore, hold cloth platform 27 utilization and hold cloth platform conversion cylinder 143, utilize to right-hand to be retracted into driving and can be converted to the right-hand retreating position shown in the two point chain-dotted line to the stretching out driving and can be converted to the left sewing position shown in the solid line among Fig. 3 of left.

On the other hand, the front is seen the bottom of the installing plate 30 that slightly is down L shaped is fixed on Screw and is held on the cloth platform 27, two bar types hold the cloth platform and drive cylinder 144 up and down and be installed on this installing plate 30, be directed downwards, hold fabric swatch installing plate 31 and be fixed on the lower end of the pair of pistons bar 144a of this cylinder 144, the slightly sweeping cardinal extremity that holds fabric swatch 32 is fixed on the downside that this holds fabric swatch installing plate 31 with Screw when overlooking as shown in Figure 5.This front end that holds fabric swatch 32 extends to slide plate 12 to left through semicircular needle plate 11 and to contact as shown in Figure 7.Wherein, the double-screw bolt 33(of downside that is installed in said cylinder 144 is referring to Fig. 5) be hold fabric swatch 31 lifting position is installed in order to limit, regulate height usefulness.

Therefore, hold fabric swatch 32 utilization and hold fabric swatch and drive cylinder 144 stretching out driving and can shift and be the below sewing position shown in the solid line among Fig. 5 downwards up and down, utilize being retracted into driving and can being converted to the top retreating position shown in the two point chain-dotted line upward.In addition, as previously mentioned, hold fabric swatch 32 and when retreating position moves, move to right-hand retreating position at Cheng Butai 27.

Below, with reference to Fig. 3, Fig. 4, Fig. 6 cloth mobile device 17 is described.

On aforesaid substrate 25, the belt line fork supporting 40 of direction extension to the left and right is installed in the back of holding cloth platform 27, and the travelling carriage 41 that is made of slightly rectangular sheet material is configured in this straight line intersection supporting 40, can move along left and right directions.Dead astern at this travelling carriage 41, the cardinal extremity of changing cylinder 145 along the travelling carriage of left and right directions configuration passes through frame support bracket 42 pivots on substrate 25, can shake, the front end of the piston rod 145a of this cylinder 145 is connected with drive rod 43 on being fixed on travelling carriage 41.

Therefore, travelling carriage 41 utilizes the stretch out driving of travelling carriage conversion cylinder 145 to left, can be converted to the left sewing position shown in the solid line among Fig. 3, utilizes to right-hand driving that is retracted into, and can be converted to the right-hand retreating position shown in the two point chain-dotted line.

As Fig. 4 and shown in Figure 6, the side sees that L-shaped pedestal 44 is fixed on this travelling carriage 41, by stepper motor being used to of constituting make cloth UW along and mobile the last cloth of the direction (left and right directions) of cloth feeding direction Q quadrature move the back that is installed in the vertical wall 44a of pedestal 44 with motor 141, timing pulley 45 is fixed on that cloth moves on the usefulness driving shaft 141a of motor 141 on this.

Sleeve 46 cylindraceous is fixed on the above-mentioned vertical wall 44a, and cylindric the 1st pivot 47 with flange is embedded in this sleeve 46, and this flange is contacted with the rear end face of timing pulley 45, and the 1st pivot can not be deviate from.

Be configured near the flange of this 1 pivot 47 the rear be fixed on the flange by the 1st swing arm 49 usefulness Screws that banded sheet material constitutes, simultaneously, contact with sleeve 46 by liner 48.The front end that arm rotates with the piston rod 146a of cylinder 146 is connected with the installation portion 49a that the part of the 1st swing arm 49 projects upwards, and can rotate, and arm rotates with cylinder 146 pivots on the pillar of installing on the travelling carriage 41 50, can rotate.

In addition, be configured in the place ahead of above-mentioned timing pulley 45 and have outer being embedded on the driving shaft 141a of the 2nd pivot 51 of flange, simultaneously, pivot can rotate on pivot seat 53 fixing on the travelling carriage 41.Be configured in that the flange dead ahead of the 2nd pivot 51 is made of banded sheet material and be fixed on the flange, simultaneously, contact with pivot seat 53 by liner 52 with above-mentioned the 1st swing arm 49 relative the 2nd swing arm 54 usefulness Screws.

The 1st swing arm 49 and the 2nd swing arm 54 are linked into an integrated entity by a pair of connector 55, regularly pulley 58 utilizes respectively a pair of pivot seat 57 that is fixed on the front end of the 1st swing arm 49 and the 2nd swing arm 54 with Screw 56 to carry out pivot, can rotate, regularly 59 framves of driving belt are between two timing pulleys 45 and 58.In addition, the 1st swing arm 49 and the 2nd swing arm 54 make the upside and the following side contacts of a pair of double-screw bolt that is fixed on the pedestal 44 60 and connector 55, limit its scope of activities.Between two swing arms 49 and 54, as shown in Figure 6, assembling a pair of tension pulley 61 that is used for providing tension force to timing driving belt 59.

Therefore, cloth moves just commentaries on classics driving or the inversion driving with motor 141 in the utilization, and regularly driving belt 59 carries out forward or reverse by two timing pulleys 45 and 58, thereby can make the last cloth UW that is configured in regularly driving belt 59 downsides to left or right-hand moving.In addition, two swing arms 49 and 54 utilize arm to rotate with the stretch out driving of cylinder 146 to left, can be converted to the sewing turned position shown in the solid line among Fig. 5, and utilization is retracted into driving and can be converted to the turned position of keeping out of the way shown in the two point chain-dotted line to right-hand.Wherein, keep out of the way the turned position and at the left sewing position, and when holding fabric swatch 32 and switching to the top retreating position and be the left sewing position, following cloth DW can place the upside of needle plate 11 when two swing arms 49 and 54 switch to.

Below, with reference to Fig. 4 and Fig. 8～Figure 10 separating plate driving mechanism 65 is described, this separating plate driving mechanism 65 be arranged on needle plate 11 above, be used for driving the separating plate 66 that the feeding of the feeding of correctly independently going up cloth UW respectively and following cloth DW is used.

Separating plate 66 is tabular, looks down to be bending, at needle plate 11 with hold between the fabric swatch 32, simultaneously, its front end extends to down between feed dog 8 and the last feed dog 7, rearward is bending, its cardinal extremity forms a high step, is fixed on the left end of installing plate 67 with Screw.On the other hand, as Fig. 4 and shown in Figure 10, L shaped installing plate 68 is fixed on above-mentioned holding on the fabric swatch installing plate 31, drives cylinder 147 before and after the separating plate and is installed on this L shaped installing plate 68, and the L shaped installing plate 69 usefulness Screws of front end that are fixed on the piston rod 147a of this cylinder 147 are fixed on the installing plate 67.That is, separating plate 66 is connected with piston rod 147a with L shaped installing plate 69 by installing plate 67.

Therefore, separating plate 66 utilizes and drives that cylinder 147 is rearward to be stretched out driving and can be converted to the rear sewing position shown in the solid line among Fig. 8 before and after the separating plate, utilizes being retracted into driving and can being converted to the place ahead retreating position shown in the two point chain-dotted line forwards.And, because being installed in by driving cylinder 147 and L shaped installing plate 68 before and after the separating plate, holds on the fabric swatch installing plate 31 separating plate 66, so, hold fabric swatch 32 when the retreating position that rises moves, move to the retreating position of top.

Below, with reference to the following cloth mobile device 18 that Fig. 2, Figure 11～Figure 13 explanation makes down cloth DW move along left and right directions.

In above-mentioned base 1, dispose the lower shaft 13(that extends along left and right directions referring to Fig. 2), the left end of this lower shaft 13 is connecting shuttle 75, and shuttle sleeve 76 is contained in this shuttle 75.In addition, at the fuel tank 77 of operation, in order to shuttle 75 is topped with the downside setting of workbench T.

At the downside of fuel tank 77, the tabular support frame 78 that extends is installed downwards.To the cylinder that following cloth travel mechanism 80 drives up and down, promptly adopt under the piston-rodless type of magnetic mode cloth to drive and be installed on this support frame 78 with state that square neck is oblique to the right on it with cylinder 148.Therefore down cloth travel mechanism 80 utilize cloth down drive with cylinder 148 upward stretch out driving, can be converted to the top sewing position shown in the solid line among Figure 11, utilization being retracted into driving and can being converted to the below retreating position shown in the two point chain-dotted line downwards.

Below, illustrate with following cloth to drive the following cloth driving mechanism 80 that the moving part 148a with cylinder 148 is connected.

The following cloth that is used for cloth DW is moved along left and right directions moves with motor 142 and is fixed on this moving part 148a, and simultaneously, the front sees that the lower end of the support plate 81 that slightly is platform shape is fixed thereon with Screw.The upper end of this support plate 81 is by liner 82, be connected with the lower end of steady arm 83, a pair of pivot 85 and 86 is fixed on the upper end of this steady arm 83 by liner 84 usefulness Screws, partly is conical cloth feed wheel 87 usefulness pins 88 pivots down and can rotates in the upper end of this a pair of pivot 85 and 86.

Regularly driving belt 90 is enclosed within down cloth feed wheel 87 and is fixed on down cloth and drives with between the pulley 89 on the driving shaft 142a of motor 142.Therefore, utilize cloth down to drive just commentaries on classics driving or inversion driving with motor 142, following cloth feed wheel 87 is by pulley 89 and regularly driving belt 90 can forward or reverse, thereby can make the following cloth DW that is disposed at regularly driving belt 90 upsides to left or to right-hand mobile.

Here, as shown in figure 13, when cloth travel mechanism 80 is transformed into the top sewing position instantly, following cloth feed wheel 87 by rise at the rectangular slits 11a that forms on the slide plate 12 expose hold cloth platform 32 under shuttle, so, the shuttle conveying end 77a that forms on the fuel tank 77 by under cloth travel mechanism 80 topped.But when cloth travel mechanism 80 was transformed into the below retreating position instantly, following cloth feed wheel 87 just dropped to the downside of fuel tank 77, and the operator can take out shuttle sleeve 76 by shuttle conveying end 77a when this state.

Below, explanation is used for detecting the last selvedge testing agency 95 of the selvedge position of cloth UW with reference to Fig. 8～Figure 10, Figure 17 and Figure 18.

Slightly rectangular sensor mount pad 96 is arranged on the upside that hold fabric swatch 32 corresponding with above-mentioned needle plate 11 when overlooking, and is fixed on Screw and holds on the fabric swatch 32.And, as Figure 17 and the left end at this sensor mount pad 96 shown in Figure 180, in order to set cloth UW its about Lower Half is cut, form sensor installation portion 96a, the last selvedge detecting sensor 97 that is made of prism is installed in this sensor installation portion 96a, and the downside of its underpart and sensor installation portion 96a is close.That is, last selvedge detecting sensor 97 is arranged on the upside of going up eedle 4 along cloth feeding direction Q.

As shown in figure 18, last selvedge detecting sensor 97 is that 90 ° i.e. the 1st prism 98 and 99 combinations of the 2nd prism of right-angle prism constitute by drift angle, an end face of the 1st prism 98 and an end face of the 2nd prism 99 are pasted together, the 2nd prism 99 be provided with the selvedge quadrature.And the front end face that is about the last cloth optical fiber group FA that 10 optical fiber A1-A10 of 0.5mm constitute by fibre diameter forms a line, and is connected with the right-hand member (plane of light incidence) of the 1st prism 98 respectively.In addition, 10 light-emitting component OSU1-OSU10 that are made of light emitting diode simultaneously, are provided with 10 light receiving element ISU1～ISU10 that are made of phototriode etc. by the end that semi-permeable and semi-reflecting mirror HM1～HM10 is arranged on optical fiber A1～A10 accordingly.

Therefore, the laser that comes from each light-emitting component OSU1-OSU10 projection etc. detects light by behind semi-permeable and semi-reflecting mirror HM1～HM10, incide on the 1st prism 98 through optical fiber A1～A10, and carry out total reflection to the 2nd prism 99 1 sides with the right angle, then, carry out total reflection by the 2nd prism 99 with the down at right angles side, from the 2nd prism 99 with roughly with the last cloth UW that is positioned at downside or the direction projection of holding fabric swatch 32 quadratures.And, from last cloth UW or the reverberation that holds fabric swatch 32 reflection by the 2nd prism 99 and the 1st prism 98 respectively after the total reflections, optical fiber A1～A10 through identical with when projection reflects on semi-permeable and semi-reflecting mirror HM1～NM10, and this reverberation is received by light receiving element ISU1～ISU10 respectively.

That is,, project the point range shape that the selvedge with last cloth UW intersects from the front end of 10 optical fiber A1～A10 and detect light, can detect the selvedge position of cloth UW according to its reverberation by two prisms 98 and 99.At this moment, the light quantity that light receiving element ISU1-ISU10 receives is, and is big by the light quantity that last cloth UW reflex time receives by the light amount ratio of holding the reception of fabric swatch 32 reflex times.

Below, be used for detecting down the following selvedge testing agency 100 of the selvedge position of cloth DW with reference to Fig. 4, Fig. 7, Figure 14, Figure 15, Figure 17 and Figure 19 explanation.

As shown in Figure 4, sensor support plate 101 is fixed on the above-mentioned cloth of going up and moves with on the corresponding base plate 25 of the downside of motor 141, and web 102 is installed in the downside of the left end of this sensor support plate 101.In addition, on needle plate 11, form the otch 11b that slightly is the コ shape when overlooking, overlook with the side and see that the sensor mount pad 103 that slightly is crank-like is fixed on the front end of above-mentioned web 102, the step part of this sensor mount pad 103 is positioned at otch 11b.

The following selvedge detecting sensor 104 that is made of prism is installed in the long sensor installation portion 103a of the front end edge left and right directions of sensor mount pad 103, and the upside of its top and sensor installation portion 103a is close.That is, it is roughly relative with above-mentioned last selvedge detecting sensor 97 that following selvedge passes detecting sensor 104, and be arranged on the upside of going up eedle 4 along cloth feeding direction Q.

As shown in figure 19, it is that the 1st prism 105 and the 2nd prism 106 combine that following selvedge detecting sensor 104 becomes 90 ° right-angle prism by drift angle, an end face of the 1st prism 105 and an end face of the 2nd prism 106 are pasted together, the 2nd prism 106 dispose with the selvedge quadrature.And, the front end face that is about the following cloth optical fiber group FB that 10 optical fiber B1～B10 of 0.5mm constitute by fibre diameter forms a line and is connected with the right side (plane of light incidence) of the 1st prism 105 respectively, in addition, 10 light-emitting component OSD1～OSD10 that are made of light emitting diode etc. are arranged on the end of optical fiber B1～B10 accordingly by semi-permeable and semi-reflecting mirror HM11～HM20, simultaneously, also be provided with 10 light receiving element ISD1～ISD10 that constitute by phototriode etc.

Therefore, detect light by behind semi-permeable and semi-reflecting mirror HM11～HM20 by the laser of each light-emitting component OSD1～OSD10 projection etc., incide on the 1st prism 105 through optical fiber B1-B10, and carry out total reflection to the 2nd prism 106 1 sides with the right angle, then, carry out total reflection with the right angle to upside by the 2nd prism 106, from the 2nd prism 106 along roughly with the following cloth DW that is positioned at upside or the direction projection of holding fabric swatch 32 quadratures.And, after being carried out total reflection by following cloth DW or the reverberation that holds fabric swatch 32 reflections respectively by the 2nd prism 106 and the 1st prism 105, again through behind the optical fiber B1～B10 identical with when projection, reflect on semi-permeable and semi-reflecting mirror HM11～HM20, this reverberation is received by light receiving element ISD1～ISD10 respectively.

That is,, project the point range shape that the selvedge with following cloth DW intersects from the front end of 10 optical fiber B1～B10 and detect light, can detect down the selvedge position of cloth DW according to its reverberation by two prisms 105 and 106.At this moment, the light quantity that light receiving element ISD1～ISD10 receives is, and is big by the light quantity of cloth DW reflex time reception down by the light amount ratio of holding the reception of fabric swatch 32 reflex times.

Shown in Fig. 7, Figure 14 and 15, the right side of the pin hole 11C that forms near needle plate 11 is provided with the limited wheel 110 of the selvedge position that is used for limiting respectively cloth UW and following cloth DW, the cardinal extremity of this limited wheel 110 is fixed on the above-mentioned connecting plate 102, pivot can freely rotate at the front end of the support unit 111 that extends to left.

Below, with reference to Fig. 2 and Figure 16 the auxiliary cloth mobile device 19 of going up is described.

At the left end of above-mentioned operation with workbench T, erectly be provided with pivot seat 115, rotor plate 116 utilizes the bolt pivot on this pivot seat 115, can rotate, in addition, the auxiliary cloth of going up of two bar types supports cylinder 149 to be installed in the upper end of this rotor plate 116 with the state that tilts to the lower right.

Cylinder installing component 118 is installed in this auxiliary front end of going up the piston rod 149a of cloth support cylinder 149, the auxiliary charity air cylinder 150 of going up is installed on this cylinder installing component 118 towards right-hand, in addition, the front sees that the L-shaped auxiliary cloth parts 119 that hold are installed in the auxiliary front end of going up the piston rod 150a of charity air cylinder 150.Therefore, as shown in figure 16, the auxiliary cloth parts 119 that hold utilize the auxiliary cloth of going up to support cylinder 149 to right-hand driving of stretching out, can be converted to the right-hand sewing position shown in the solid line among Figure 16, utilize the auxiliary cloth of going up to support the be retracted into driving of cylinder 149, can be converted to the left retreating position of (representing with solid line among Fig. 2) shown in the two point chain-dotted line among Figure 16 to left.In addition, hold cloth parts 119 and be transformed into right-hand sewing position when auxiliary, and two swing arms 49 and 54 are converted to when keeping out of the way the turned position, charity air cylinder 150 stretches out when driving on auxiliary, utilizes regularly driving belt 59 and the auxiliary right-hand member that holds cloth parts 119 can support the last cloth UW that disposes along the vertical direction auxiliaryly.Here, bolt supporter 120 usefulness Screws are fixed on the pivot seat 115, are to support the gradient of cylinder 149 to be provided with in order to adjust the above-mentioned auxiliary cloth of going up by the bolt 121 that is threaded on the screw rod supporter 120.

The structure of the control system of sewing machine for covering chain stitch M and automatic workpiece guiding device 15 is shown in the block diagram among Figure 20.

Be arranged on program switch 130 on the operation board 10, program correction switch 131, sewing prepare switch 132, sewing beginning switch 133, firing switch 134, cancel switch 135, ten key 136, configuration switch 137 and be used for detecting the machine spindles that are arranged in the cantilever 3 with rotate the position mutually and the needle position signal generator 138 of the output needle position signal corresponding with the shift position of shank be connected with the input/output interface 185 of control device C respectively.

In addition, the drive circuit 170 that is used for electrical motor of sewing machine 140, be used for cloth and move the drive circuit 171 of using motor 141, being used for down, cloth moves the drive circuit 172 of using motor 142, the drive circuit 173 of solenoid directional control valve 151 usefulness of cloth platform reversing cylinder 143 is held in driving, the drive circuit 174 that fabric swatch drives solenoid directional control valve 152 usefulness of cylinder 144 is up and down held in driving, drive the drive circuit 175 of solenoid directional control valve 153 usefulness of travelling carriage reversing cylinder 145 usefulness, actuating arm rotates the drive circuit 176 with solenoid directional control valve 154 usefulness of cylinder 146, drive the drive circuit 177 that the separating plate front and back drive solenoid directional control valve 155 usefulness of cylinder 147, drive the drive circuit 178 of solenoid directional control valve 156 usefulness of cylinder 148 of cloth driving down, drive the auxiliary drive circuit 179 that cloth is supported solenoid directional control valve 157 usefulness of cylinder 149 of going up, drive the auxiliary drive circuit 180 of going up solenoid directional control valve 158 usefulness of charity air cylinder 150, be used for presser feet and drive the drive circuit 181 of using solenoid 159, light-emitting component OSD1～OSD10 and light receiving element ISD1～ISD10 that the light-emitting component OSU1～OSU10 of the selvedge detection usefulness of last cloth UW and the selvedge of light receiving element ISU1～ISU10 and following cloth DW detect usefulness are connected with input/output interface 185 respectively.

Control device C is made of input/output interface 185, ROM188 and the RAM189 that well-known CPU187, bus 186 by data/address bus etc. are connected with this CPU187.

Corresponding to the operation of various switches 130～137, the control program of the distinctive selvedge of the drive controlling program of drive motors 140～142 and solenoid directional control valve 151～158 and the described the present invention in back alignment control etc. is stored in the ROM188 respectively.

Temporary transient storage is located in the RAM189 by the various memories such as buffer storage, counter and indicator of the result of calculation that CPU187 calculates.

Below, the program that the selvedge that utilizes the dress system device C of sewing machine for covering chain stitch M and automatic workpiece guiding device 15 to carry out with reference to the programme diagram explanation of Figure 21～Figure 28 aligns and controls.Symbol Si(i=10,11,12 among the figure ...) be each program step.

When connecting power supply for sewing machine for covering chain stitch M, just begin control, at first,, simultaneously, drive each solenoid directional control valve 151～158 with each memory zero clearing of RAM189, each cylinder 143～150 commutates respectively according to named order and is driven into retreating position.In addition, because presser feet drives and is driven with solenoid 159, so, can carry out and make depression bar and last feed dog 7 move to the retreating position of rising, handle (S10) promptly etc. a series of initial setting, carrying out the result that initial setting is handled, is to make down cloth DW and last cloth UW be in the state that can place on the needle plate 11.

Then, when the program switch 130 on the operation aforesaid operations dish 10 (S11, S12:yes), last cloth UW that execution is sewed and the sewing of following cloth DW are with parameter setting processing controls (referring to Figure 22) (S13).

During this control beginning, desirable program sequence number (S25) is set and imported to operation ten key 136 earlier, then last cloth UW set and the sewing interval number D(S26 of input from the sewing starting position to the sewing end position).Here, between so-called sewing area, be between the sewing area of selvedge shape by the identical sewing scope dictates of radius of curvature with last cloth UW.For example, as shown in figure 29, will be from the sewing starting position of last cloth UW to the selvedge shape of sewing end position, by the identical sewing scope of radius of curvature be set between sewing area 1 in proper order, between sewing area 2, between sewing area 3 ..., this sewing interval number D utilizes the operation of 10 numerical keys 136 to import.

Then, the count value Dn that is located at counter between the sewing area among the RAM189 is set initial value " 1 " (S27), to Dn between this sewing area, the input pin of sewing is counted the reference optical fiber sequence number As of Pn and the last cloth optical fiber group FA corresponding with selvedge position at this moment, utilize the operation of setting key 137, pin is counted Dn between Pn and reference optical fiber sequence number As sewing area store into accordingly in the working storage of RAM189 (S28).Then, sewing bin count values Dn increases 1(S29), this count value Dn (S30:No), carries out the program of S28～S30 during less than sewing interval number D repeatedly.

Between this count value Dn is greater than sewing area during D (S30:yes), the same for the following cloth DW above-mentioned cloth UW of going up that mediates a settlement, each sewing interval number E corresponding to the following cloth DW that sets, the pin of input sewing is counted the reference optical fiber sequence number Bs of Pn and the following cloth optical fiber group FB corresponding with selvedge position at this moment respectively, setting key 137 of every operation is just counted pin En between Pn and reference optical fiber sequence number Bs and sewing area and is stored in the working storage of RAM189 (S31～S35) accordingly into.When E has set pin and counts Pn and reference optical fiber sequence number Bs between to the sewing area of being deposited (S35:yes), finish this control, turn back to the S11 that carries out selvedge alignment control shown in Figure 21.Therefore, in the table memory of RAM189, for example, as shown in figure 30, for Dn between each sewing area of last cloth UW, storing and going up cloth parameter list PTU, on this among cloth parameter list PTU, to count Pn corresponding with benchmark selvedge position corresponding reference optical fiber sequence number As and pin.In addition, for following cloth DW, equally also storing the cloth parameter list.

(S11:yes during operation sequence correction switch 131; S12:No; S14:yes), operate 10 numerical keys 136, the sequence number (S15) of the program that input is revised is to the content of this program sequence number, carry out and to revise pin successively and count Pn and reference optical fiber sequence number As corresponding and the correcting process (S16) of Bs, turn back to above-mentioned S11 then with the selvedge position.

(S11:yes when switch 132 is prepared in the operation sewing; S12 and S14:No; S17:yes), carry out sewing and prepare processing controls (referring to Figure 23) (S18).

Begin to carry out this control, when operating firing switch 134 earlier (S40 and S41:yes), according to the flag data that is located at the tag memory among the RAM189, when not setting the 1st start identification 1MF, be that each cylinder 143～150 drives when retreating position (S42:No) respectively, make earlier and hold cloth platform reversing cylinder 143 and stretch out driving (S43), make travelling carriage reversing cylinder 145 stretch out driving (S44) then, set the 1st start identification 1MF(S45), turn back to above-mentioned S40 then, therefore, remain under the state of keeping out of the way the turned position at two swing arms 49 and 54, be transformed into the left sewing position, and, hold fabric swatch 32 remain on above under the state of retreating position, be transformed into the left sewing position.At this moment, as shown in Figure 9, the selvedge position of cloth DW is contacted with limited wheel 110 from left, simultaneously, make the sewing starting position consistent with needle downing position, following cloth DW is set in the upside of needle plate 11 and holds the downside of fabric swatch 32.

When operating firing switch 134 once more (S40 and S41:yes), the 1st start identification 1MF sets (S42:yes), when the 2nd start identification 2MF has removed (S46:No), make earlier and hold fabric swatch and drive cylinder 144 up and down and stretch out driving (S47), then, make the separating plate front and back drive cylinder 147 and stretch out driving (S48).In addition, cloth is driven stretches out driving (S49), set the 2nd start identification 2MF(S50 with cylinder 148), then, turn back to above-mentioned S40.Therefore, holding under the state that fabric swatch 32 remains on the left sewing position, be transformed into the below sewing position, separating plate 66 is transformed into the rear sewing position, and down cloth travel mechanism 80 is transformed into the top sewing position, will play cloth DW to push and remain on by the upper end of timing driving belt 90 and play cloth feed wheel 87 and hold on the fabric swatch 32.

At this moment, as shown in Figure 9, the selvedge of cloth UW is contacted with limited wheel 110 from left, make its selvedge consistent simultaneously, and make sewing starting position and needle downing position as one man be set in the upside that holds fabric swatch 32 with the selvedge of following cloth DW.

Then, when operating firing switch 134 once more (S40 and S41:yes), the first start identification 1MF and the 2nd start identification 2MF set (S42 and S46:yes), when the 3rd start identification 3MF does not set (S55:No), arm is rotated stretch out driving (S56) with cylinder 146, set the 3rd start identification 3MF(S57), then, turn back to above-mentioned S40.Therefore, two swing arms 49 and 54 are transformed into the sewing turned position, will be gone up cloth UW extruding and be remained on by the lower end of timing driving belt 59 and hold on the fabric swatch 32.

When operating firing switch 134 once more (S40 and S41:yes), when 1st, the 2nd, the 3rd start identification 1MF, 2MF, 3MF have set respectively (S42, S46, S55:yes), stop to drive presser feet driving solenoid 150(S58), presser feet 6 and last feed dog 7 are transformed into the pushing position, after finishing this control, turn back to the S11 in the selvedge alignment control program shown in Figure 21.

But, stopping to drive the presser feet driving with before the solenoid 150, (S40:yes during operation cancel switch 135; S41:No; S51:yes), when the 2nd start identification 2MF or the 3rd start identification 3MF have set (S52:yes), the cylinder 144 and 146～148 orders that make in addition all of cylinder 143 and 145 stretch out driving according to named order are retracted into driving (S53), two start identification 2MF and 3MF are removed (S54) respectively, turn back to above-mentioned S40 then.As a result, can begin to set again from following cloth DW.

(S11:yes:S12, S14, S17:No during operation sewing beginning switch 133; S19:yes), carry out sewing processing controls (referring to Figure 24) (S20).

When beginning this control, the count value P zero clearing (S60) that makes the counting pin count P earlier drives electrical motor of sewing machine 140(S61).Therefore, last feed dog 7 and following feed dog 8 are carried out the cloth feed motion respectively, make to reach the predefined cloth amount of feeding, so the selvedge of last cloth UW and following cloth DW begins alignment.

Needle position signal according to needle position signal generator 138, when reaching eedle 4 to penetrate cloth UW be the timing of so-called card clothing unanimity (S62:yes), pin counting number value P increases 1(S63), reach cloth parameter list PT down according to this pin counting number value P and the above-mentioned cloth of going up, make processing when not finishing (S64:No), earlier last cloth UW is carried out selvedge position probing processing controls (referring to Figure 25) (S65).

When beginning this control, the count value f to the optical fiber counter sets initial value " 1 " (S77) earlier, makes by the last cloth of this optical fiber count value f indication and lights luminous (S78) with light-emitting component OSUn.The result, as previously mentioned, the detection light process optical fiber An corresponding from light-emitting component OSUn projection with this light-emitting component OSUn, again by behind the 1st prism 98 and the 2nd prism 99, at last cloth UW or hold on the fabric swatch 32 and reflect, this reverberation is through same optical fiber An, and Mn reflects by semi-permeable and semi-reflecting mirror, is received by the light receiving element ISUn corresponding with light-emitting component OSUn.Then, obtain and the corresponding reception light light value r(digital value of light quantity of using light receiving element ISUn to receive by the last cloth of optical fiber count value f indication) (S79).

When this receives light light value r greater than specified threshold value k (S80:yes) since do not exist corresponding with this optical fiber An, last cloth UW, so, setting be the optic fiber sign FF(f of parameter with optical fiber count value f) (S81).On the other hand, when this receives light light value r less than threshold value k (S80:No), owing to have the last cloth UW corresponding with this optical fiber An, so, with optic fiber sign FF(f) removing (S82).

Then, extinguish (S83) by the last cloth of optical fiber count value f indication with light-emitting component OSUn, count value f increases 1(S84), as this count value f during greater than the fiber count A of last cloth optical fiber group FA (S85:No), carry out the program of S78～S85 repeatedly.Throw the detection light of the point range shape that the selvedge with last cloth UW intersects in proper order for all optical fiber An, and when obtaining their reception light light value r (S85:yes), according to a A corresponding optic fiber sign FF(f with fiber count A) flag data, the optical fiber sequence number Am(S86 that determines the optical fiber sequence number Am corresponding, is these flag datas when " 1 " becomes " 0 ") with the selvedge position of last cloth UW, after this control finishes, turn back to the S66 in the sewing processing controls program shown in Figure 24, cloth side-play amount computing control (referring to Figure 26) in the execution.

When beginning this control, obtain at that time the i.e. sequence number Dn(S105 between at that time sewing area of sewing position according to pin counting number value P and last cloth parameter list PTU), from last cloth parameter list PTU read with this sewing area between the corresponding reference optical fiber sequence number As(S106 of sequence number Dn).Then,, calculate the side-play amount of selvedge position, simultaneously, obtain this offset direction (107) with respect to reference optical fiber sequence number As according to the diameter of this reference optical fiber sequence number As, selvedge optical fiber sequence number Am and optical fiber.After this control finishes, turn back to the S67 in the sewing processing controls program, according to this side-play amount and offset direction, cloth moves with motor 141 in the driving.As a result, change, whenever between the change sewing area during Dn even go up the radius of curvature of the selvedge shape of cloth UW, can obtain the side-play amount of selvedge position with respect to the reference optical fiber sequence number As of Dn between this sewing area, so,, always can make cloth UW positively keep the locking edge width of appointment.

Subsequent, for following cloth DW, carry out selvedge position probing processing controls (referring to Figure 27) (S68).Because this control is the same with above-mentioned last Bu Bubian position probing processing controls, so, only carry out simple explanation, f increases at 1 o'clock whenever the optical fiber count value, following cloth by this optical fiber count value f indication is lighted luminous with light-emitting component OSDn, the detection light that casts out from light-emitting component OSDn passes through optical fiber Bn, 1st prism 105 and 2nd prism 106 corresponding with this light-emitting component OSDn, at following cloth DW or hold and reflect on the fabric swatch 32, this reverberation is reflected by semi-permeable and semi-reflecting mirror HMn through behind the same optical fiber Bn, is received by the light receiving element ISDn corresponding with light-emitting component OSDn.Then, according to the size of the light value r corresponding with the light quantity of this light receiving element ISDn reception, setting or removing with optical fiber count value f is the optic fiber sign FF(f of parameter) (S90～S98).

For all optical fiber Bn, the detection light of the point range shape that the selvedge of order projection and following cloth DW is reported to the leadship after accomplishing a task, obtain (S98:yes) behind their the reception light light value r, according to a B corresponding optic fiber sign FF(f with fiber count B) flag data, determine the optical fiber sequence number Bm(S99 corresponding) with the selvedge position of following cloth DW, after this control finishes, return, carry out cloth side-play amount computing control (referring to Figure 28) down with the S69 in the sewing processing controls program.

When beginning this control, the same with above-mentioned upward cloth side-play amount computing control, read with at that time sewing area between the corresponding reference optical fiber sequence number Bs(S110 of sequence number En, S111), calculate the side-play amount of the cloth end position corresponding with reference optical fiber sequence number Bs, simultaneously, obtain this offset direction (S112), after this control finishes, turn back to the D70 in the sewing processing controls program shown in Figure 24, move with motor 142 according to cloth under side-play amount and the offset direction driving, turn back to S62 then.The result, even the radius of curvature of the selvedge shape of following cloth DW changes, En when change whenever between sewing area because can obtain and this sewing area between the side-play amount of reference optical fiber sequence number Bs selvedge position of En, so, always can make down cloth DW positively keep the locking edge width of appointment.

After making end-of-job (S64:yes), when reaching the timing of position on the pin, stop to drive electrical motor of sewing machine 140(S71), drive presser feet driving solenoid 159(S72), by named order all cylinders 143～148 are retracted into driving (S73), finish after this control, turn back to the S11 in the selvedge alignment control program shown in Figure 21.As a result, hold fabric swatch 32, separating plate 66 and two swing arms 49 and 54 etc. and be transformed into retreating position respectively, so, just incorporate sewing can be taken out after handling through sewing.

As mentioned above, handle corresponding reference optical fiber sequence number As and Bs between sewing area at that time in advancing by change setting and sewing, the selvedge of cloth UW is moved to the direction with cloth feeding direction Q quadrature, simultaneously, the selvedge of cloth DW is moved to the direction with cloth feeding direction Q quadrature, side-play amount with the selvedge position of eliminating the last cloth UW that obtains according to the reference optical fiber sequence number As that change and Bs and selvedge optical fiber sequence number Am and following cloth DW, so, no matter how are predefined reference optical fiber sequence number As and Bs, even the selvedge shape of last cloth UW and following cloth DW is to comprise multiple curve and the straight line complicated shape that is made of different radius of curvature, what also always can keep appointment reliably does the seam width, thereby can carry out rakish lock seaming work.

In addition, the reference optical fiber sequence number As of each pin number that also can begin each sewing and this needle downing position and Bs store in above-mentioned cloth parameter list PTU of going up and the following cloth parameter list accordingly.At this moment, can keep doing the seam width more accurately.

As last cloth mobile device 17, also can adopt the structure that feed dog 7 can be moved to the direction with cloth feeding direction Q quadrature; As following cloth mobile device 18, also can adopt the structure that feed dog 8 can be moved to the direction with cloth feeding direction Q quadrature.

In addition, the radical that is arranged on the optical fiber among cloth optical fiber group FA and the following cloth optical fiber group FB is not limited to 10, also can change the diameter of optical fiber, constitutes with any root optical fiber.

As mentioned above, automatic workpiece guiding device according to Sewing machines of the present invention, be provided with the reference position data storage, sewing position detector and reference position change setting device, handle the corresponding reference position of sewing position at that time in advancing by change setting and sewing, the sewing selvedge is moved to the direction with the cloth feeding direction quadrature, side-play amount with the selvedge position of eliminating the sewing of obtaining according to after changing reference position and selvedge position, so, no matter the reference position data of change setting how, even the selvedge shape of sewing is to comprise the multiple curve that is made of different radius of curvature and the complicated shape of straight line, what also always can keep appointment reliably does the seam width, thereby can carry out rakish lock seaming work.

The industrial sewing machine for covering chain stitch of M-

The 15-automatic workpiece guiding device

The last cloth mobile device of 17-

Cloth mobile device under the 18-

The 25-base

The 41-travelling carriage

45-is pulley regularly

49-the 1st swing arm

54-the 2nd swing arm

58-is pulley regularly

59-is driving belt regularly

Cloth travel mechanism under the 80-

Cloth feed wheel under the 87-

90-is driving belt regularly

The last selvedge of 95-testing agency

The last selvedge detecting sensor of 97-

Selvedge testing agency under the 100-

Selvedge detecting sensor under the 104-

Claims (3)

1, have the automatic workpiece guiding device of the Sewing machines of selvedge detector, offset calculator and sewing shifter, the selvedge detector is arranged on the upside of eedle on the cloth feeding direction, is used for detecting the selvedge position of sewing; Offset calculator is obtained the side-play amount of the predefined reference position of selvedge position deviation of sewing according to the output of selvedge detector; The sewing shifter is used for making the selvedge of sewing to move to the direction with the cloth feeding direction quadrature, to eliminate the side-play amount of obtaining by offset calculator, it is characterized in that: be provided with reference position data storage, sewing position detector and reference position change setting device in the automatic workpiece guiding device of this Sewing machines, the data of the reference position that reference position data memory serves handle is corresponding with the sewing position of sewing store; The sewing position detector is used for detecting the sewing position at that time of sewing; Reference position change setting device is set the reference position according to the output of sewing position detector and the data change of reference position data storage storage.

2, sewing device, it is characterized in that: comprise the cloth feed mechanism and down the cloth feed mechanism, go up sewing travel mechanism and down sewing travel mechanism, go up selvedge detector and selvedge detector, work feed memory, selvedge position data memory, sewing position detector, the 1st controller and the 2nd controller down, last cloth feeding mechanism and down cloth feeding mechanism can distinguish the last sewing and the following sewing of feeding overlapping suture independently; Last sewing travel mechanism and following sewing travel mechanism can make the selvedge of above-mentioned upward sewing and the selvedge of following sewing move to the direction with the cloth feeding direction quadrature respectively independently; Last selvedge detector and down the selvedge detector can distinguish and detect the above-mentioned selvedge of sewing and the selvedge of following sewing gone up independently; The work feed memory is used for the data relevant with the relative feeding of above-mentioned sewing up and down and the sewing position of sewing are stored accordingly in advance; Selvedge position data memory is used for the selvedge reference position and the sewing position of two sewings of the inspection positions of above-mentioned two selvedge detectors are stored accordingly in advance; The sewing position detector is used for detecting the sewing position at that time of above-mentioned two sewings; The 1st controller is according to the output of above-mentioned sewing position detector and the above-mentioned cloth feeding mechanism and the following cloth feeding mechanism gone up of Data Control of above-mentioned work feed memory; The 2nd controller is according to above-mentioned sewing travel mechanism and the following sewing travel mechanism of going up of the Data Control of the output of above-mentioned sewing position detector and above-mentioned selvedge position data memory.

3, sewing device as claimed in claim 2 is characterized in that: go up the work feed memory as the data relevant with relative cloth feed amount, the cloth feed amount of sewing is with respect to the data of the cloth feed amount ratio of the cloth feed amount of last sewing under the storage.

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