CN101775715A

CN101775715A - Thread cutting device for a sewing machine

Info

Publication number: CN101775715A
Application number: CN201010001456A
Authority: CN
Inventors: S·勒米奇; T·内尔特格; T·弗莱克
Original assignee: Duerkopp Adler AG
Current assignee: SHANGGONG SHENBEI (Group) Co.,Ltd.
Priority date: 2009-01-09
Filing date: 2010-01-08
Publication date: 2010-07-14
Anticipated expiration: 2030-01-08
Also published as: EP2206819A1; ATE510059T1; CN101775715B; KR20100082721A; DE102009004218A1; TW201033432A; EP2206819B1; TWI463052B

Abstract

The invention relates to a thread cutting device for a sewing machine, wherein the thread cutting device includes a movable thread cutting blade (37) and a counter blade (115) firmly fixed at a sewing machine frame. A cutting edge (116) of a movable thread cutting blade (37) is limited by a cutting-wall section (119) of an upper thread drawing blade wall (119a) of the cutting blade (37), the cutting edge cooperates with the counter edge (117) of the counter blade (115). The upper thread drawing blade wall (119a) is superposed to a movement plane (120) of the cutting blade (37) during thread cutting. At the other side of the cutting edge (116), the upper thread drawing blade wall (119a) wall passes into a distance-wall section (121) arranged at a distance from the movement plane (120), so that the cutting blade (37) is only contacted to the counter blade during thread cutting. Therefore, a thread cutting device with high wearing property and operational reliability is formed.

Description

The thread cutting device that is used for Sewing machines

Technical field

The present invention relates to a kind of thread cutting device that is used for Sewing machines as described in the preamble according to claim 1.The invention still further relates to a kind of Sewing machines with such thread cutting device.

Background technology

Thread cutting device by the described type of the known beginning of disclosed existing applicable cases.Known other thread cutting device of following company document by DE 9211820U1, DE 102007045599A1 and D ü rkopp Adler AG: 767 professional Sewing machines pathfinder/service manuals (Serviceanleitung) 10/2008 edition.

Summary of the invention

The objective of the invention is to, the thread cutting device that improves the described type of beginning is to improve its durability and particularly functional reliability.

According to the present invention, described purpose realizes by the thread cutting device with the feature that provides in claim 1.

Recognize according to the present invention, only when directly closing on cutting edge, just need make between movable thread cutter and the corresponding cutter to contact in fact with corresponding sword cutting contact.Guarantee that by the spaced walls section this contact can occur with wishing in advance.Therefore, in thread cutting device according to the present invention, before the cutting process of reality, guarantee the easy motion of thread cutter with respect to corresponding cutter.Described spaced walls section particularly forms by the grinding concave surface in the described thread cutter.Described corresponding cutter particularly can be fixed on the shuttle bearing of Sewing machines.When regulating described shuttle bearing, automatically carry out the follow-up adjustment (Mitverstellung) of corresponding cutter, thereby needn't carry out redirecting of corresponding cutter.Described spaced walls section can carry out the transition in the thread cutter wall continuously.The secant plane of thread cutting device can be oriented to be parallel with the plane of movement of thread cutter in cutting movement.

The configuration of spaced walls section according to claim 2 is guaranteed: can undesirably not contact with corresponding cutter in this spaced walls section.

Control band according to claim 3 allows to regulate simply the cutting force of thread cutting device.The cutting edge of thread cutter is corresponding with the cutting force of clearly determining with respect to the exactly determined relative position of corresponding cutter in control band.Thereby control band can be labeled out and can easily be found.Described mark for example can be realized by laser beam marking.

Movable corresponding cutter according to claim 4 has been realized simple cutting force adjusting.

Movable corresponding cutter according to claim 5 has been realized simple cutting force adjusting equally.

Configuration according to claim 6 and 7 described set bolts advantageously is combined with multiple function.

Thread cutter according to claim 8 has obtained proof in practice.Described thread cutting device can be used to cut at least one upper thread and/or be used to cut at least one bottom line.

The advantage of Sewing machines according to claim 9 is with identical in conjunction with the described advantage of thread cutting device according to the present invention hereinbefore.Described Sewing machines is usually directed to single needle Sewing machines, two-needle sewing machine or also can is to have the more multineedle sewing machine of spininess.

Description of drawings

Elaborate embodiments of the invention by accompanying drawing below.Wherein:

Fig. 1 illustrates the view of the active side of a two-needle sewing machine, has wherein omitted board to demonstrate each part that is installed in the substrate;

Fig. 2 illustrates the perspective view according to the two-needle sewing machine of Fig. 1;

Fig. 3 illustrates the needle bar of sewing machine changeover module of amplification by the direction of observation according to Fig. 1, and wherein two shanks all are in top dead centre and are in the sewing work state of access;

Fig. 4 is illustrated the view of shank changeover module by the direction of observation IV among Fig. 3;

Fig. 5 is illustrated the view of shank changeover module by the direction of observation V among Fig. 4;

Fig. 6 illustrates assembly with the view that is similar to Fig. 3, and wherein left shank is access in the lower dead center zone and right shank is moved out of;

Fig. 7 is illustrated in according to the shank changeover module under the switching state of Fig. 6 with the view that is similar to Fig. 4;

Fig. 8 illustrates the shank changeover module with the view that is similar to Fig. 6, wherein according to shank shown in the position of implementing pin transmission oscillating motion, compares the several parts that omitted the shank changeover module with Fig. 6;

Fig. 9 is illustrated in according to the shank changeover module in the pin delivering position of Fig. 8 with the view that is similar to Fig. 7;

Figure 10 illustrates the partial enlarged drawing of the regional X among Fig. 9;

Figure 11 illustrates according to implementing the shank changeover module that pin transmits oscillating motion with the view that is similar to Fig. 8;

Figure 12 is illustrated in according to the shank changeover module in the pin delivering position of Figure 11 with the view that is similar to Fig. 7;

Figure 13 illustrates the partial enlarged drawing of the regional XIII among Figure 12;

Figure 14 illustrates the shank changeover module with the view that is similar to Fig. 4, wherein but omits several parts, is blocked in the zone of thrust axis/driving shaft (Schubwelle) and the part is broken away;

Figure 15 illustrates the enlarged drawing of the local XV among Figure 14;

Figure 16 illustrates the view of assembly according to the direction of observation XVI among Figure 14;

Figure 17 illustrates the perspective view of linkage/linkage in the delivering position of pull bar of needle bar of sewing machine conveyer;

Figure 18 illustrate observe by the direction of observation that is parallel to the thrust axis longitudinal axis, according to the side view of the linkage of Figure 17;

Figure 19 illustrates the cutaway view according to the line XIX-XIX among Figure 18;

Figure 20 illustrates linkage with the view that is similar to Figure 17, and wherein pull bar is shown in the off-position;

Figure 21 is illustrated in according to the linkage in the position of Figure 20 with the view that is similar to Figure 18;

Figure 22 illustrates the cutaway view according to the line XXII-XXII in Figure 21;

Figure 23 illustrates linkage with the view that is similar to Figure 20, wherein the split pine of the set bolt that send shank of linkage;

Figure 24 is illustrated in according to the linkage in the position of Figure 23 with the view that is similar to Figure 21;

Figure 25 illustrates the perspective view of the shuttle driven unit of Sewing machines;

Figure 26 illustrates the perspective view of the axle arrangement of shuttle/hook coil apparatus (Greifer) driven unit;

Figure 27 illustrates the side view according to the axle arrangement of Figure 26;

Figure 28 illustrates the axial longitudinal section of an arrangement according to the line XXVIII-XXVIII among Figure 27;

Figure 29 illustrates the local detail XXIX among Figure 28;

Figure 30 illustrates the cutaway view according to the line XXX-XXX among Figure 27;

Figure 31 illustrates the cutaway view according to the line XXXI-XXXI among Figure 27;

Figure 32 illustrates the axle arrangement that is arranged in first boundary position that is used for the oscillation adjustment hollow shaft with the view that is similar to Figure 31, and described oscillation adjustment is used to set needle bar stroke (Schleifenhub);

Figure 33 illustrates the axle arrangement that is arranged in the opposed boundary position that is used for the oscillation adjustment hollow shaft with the view that is similar to Figure 31, and described oscillation adjustment is used to set needle bar stroke;

Figure 34 illustrates the cutaway view according to the line XXXIV-XXXIV among Figure 30;

Figure 35 illustrates the local detail XXXV among Figure 34;

Figure 36 illustrates the perspective view of the secant device assembly of Sewing machines;

Figure 37 illustrates the vertical view of deciding what is right and what is wrong of secant device assembly in the zone of cutting force adjusting bolt;

Figure 38 illustrates the side view of secant device assembly according to the direction of observation XXXVIII in Figure 37;

Figure 39 by the direction of observation that is similar to Figure 38, with wire scraper/line draw knife (Fadenziehmesser) behind the secant with respect to corresponding cutter/oppositely the position of cutter illustrates the partial enlarged drawing of secant device assembly in cutter arrangement zone;

Figure 40 illustrates the local detail XL among Figure 39;

Figure 41 is illustrated in cutting force with the view that is similar to Figure 39 and regulates the interior details that exposes in the zone of bolt;

Figure 42 is illustrated in the vertical view according to the cutter arrangement in the relative position of Figure 39;

Figure 43 is with wire scraper perspective view with respect to the cutter arrangement of the secant device assembly shown in the relative position of corresponding cutter before secant;

Figure 44 is illustrated in according to the cutter arrangement in the relative position of Figure 43 with the view that is similar to Figure 39;

Figure 45 illustrates the details XLV among Figure 44;

Figure 46 is illustrated in according to the cutter arrangement in the relative position of Figure 43 with the view that is similar to Figure 42;

Figure 47 illustrates the fragmentary, perspective view of cutter arrangement along the direction of observation of cutting force adjusting bolt;

Figure 48 illustrates the cutter arrangement with wire scraper relative position with respect to corresponding cutter when regulating cutting force;

Figure 49 is illustrated in according to the cutter arrangement in the relative position of Figure 48 with the view that is similar to Figure 44;

Figure 50 is illustrated in the details L among Figure 49;

Figure 51 is illustrated in according to the cutter arrangement in the relative position of Figure 48 with the view that is similar to Figure 46;

Figure 52 is illustrated in according to the arrangement in the relative position of Figure 48 with the view that is similar to Figure 47;

Figure 53 is illustrated in perspective view according to the cutter arrangement the relative position of Figure 39 with the direction of observation from oblique beneath drop wire clip/clamp mechanism, wherein omits corresponding cutter;

Figure 54 illustrates with the view that is similar to Figure 39 has the cutter arrangement of regulating the wire clamp of bolt prestrain by clamping force;

Figure 55 regulates the direction of observation of deciding what is right and what is wrong of bolt view according to the direction of observation LV among Figure 54 is shown to expose clamping force;

What Figure 56 was illustrated in wire scraper regulates cutter arrangement in the relative position with respect to corresponding cutter with respect to the clamp power of drop wire clip;

Figure 57 is illustrated in according to the cutter arrangement in the relative position of Figure 56 to be similar to 54 view;

Figure 58 illustrates the cutter arrangement to be similar to 55 view, and wherein clamping force is regulated bolt and engaged with wire clamp;

Figure 59 illustrates the partial enlarged drawing of Figure 58 in the zone of drop wire clip;

Figure 60 illustrates the fragmentary, perspective view from oblique upper observation of substrate in the zone of needle plate and two needle plate slide blocks adjacent with this needle plate;

Figure 61 illustrates the vertical view according to the baseplate part section of Figure 60;

Figure 62 illustrates the cutaway view according to the line LXII-LXII among Figure 61;

Figure 63 is illustrated in details LXII among Figure 62 with the fixed position, wherein can not relatively move with respect to substrate at the needle plate slide block shown in the right side among Figure 61;

Figure 64 illustrates details according to Figure 63 with the off-position, and wherein the needle plate slide block can relatively move with respect to substrate;

Figure 65 illustrates the cutaway view according to the line LXV-LXV among Figure 61; And

Figure 66 is illustrated in the details LXVI among Figure 65.

The specific embodiment

Two-needle sewing machine 1 at critical piece shown in Fig. 1 and Fig. 2 has upper arm 2, vertical column 3 and form is the lower body of substrate 4.Rotatably mounted in arm 2 have a main shaft, marks the main-shaft axis 5 of this main shaft in Figure 14 and 16.Intersection point with two boost line 5a and 5b in Figure 14 illustrates this main-shaft axis.

The body 7 of Sewing machines 1 and substrate 4 are parts of the frame of Sewing machines 1.

Be installed in the main sewing parts that CD-ROM drive motor in the arm 2 comes driving main shaft and then drives Sewing machines 1 by one.Other sewing parts drive by tape handler (not being shown specifically in the accompanying drawings).By main shaft and form is that the transmission mechanism (further being shown specifically in Fig. 3 to Fig. 6) of crank driving mechanism 8 can drive

shank

9,10 vertically up and down.Indicate with Reference numeral 9 hereinafter at the shank shown in the left side among Fig. 1, and indicate with Reference numeral 10 hereinafter at the shank shown in the right side among Fig. 1.

Shank

9,10 has a

11,12 respectively.The two pin that is formed for two

pins

11,12 of

shank

9,10 is admitted the unit.In the unshowned embodiment of Sewing machines 1, also can be provided with one and admit the single pin of two

pins

11 and 12 to admit the unit, rather than two

shanks

9,10.

Below

shank

9,10, in the upper bearing plate/seat board 13 of substrate 4, be provided with a needle plate 14 that is threaded with supporting plate 13.Needle plate 14 is shown specifically in Figure 60 and Figure 61.Needle plate 14 have two along the microscler extension of sewing direction 15 (referring to Fig. 2 and Figure 61) move materials and parts opening 16,17, the described materials and parts opening that moves is used for sacrificial vessel and has two materials and parts that move that move materials and parts portion section 18,19 to pass, the described materials and parts that move are used for transmitting below sewing.Moving materials and parts portion section 18,19 has one respectively and is used for the pin hole 20,21 that passes for corresponding

11,12.

In the sewing process, utilize presser feet 22 from above keep sewing.Can make presser feet 22 form air gaps/lift in the mode of electromagnetism by electromagnetic drive mechanism 23 (referring to Fig. 1).

In the sewing process, can select to use the

11,12 that moves materials and parts portion section 18,19 or thrust sewing itself to move forward sewing between needle plate 14 and presser feet 22.Sewing machines 1 can be selected the mode of following side's transmission or work in the mode that pin transmits.

Below needle plate 14, in substrate 4, be provided with shuttle assembly 24, the whole and spaced

shuttle

25,26 of described shuttle assembly is shown in Figure 25.In Sewing machines 1, the variable in distance between the

shuttle

25,26 so that utilizing

11,12 and the linear slit of corresponding

shuttle

25,26 sewing between variable in distance can be in the scope between several millimeters to tens millimeters.

The synchronized movement ground acting in conjunction of shuttle of

shuttle

25,26 most advanced and sophisticated 27 and

11,12 wherein forms the coil of upper thread (not shown) to form needle tracking by needle movement, described coil is caught at shuttle tip 27.

Shuttle

25,26 is designed to the shuttle that rotates around axis vertical, parallel to each other, and has a pin storage shell that is used to store bottom line respectively 28, described bottom line provides with the form of line tube.When forming needle tracking, in the two foundation lines that provide by

shuttle

25,26 one with the upper thread that provides by two

pins

11,12 in a knotting/kink.

Two upper threads are all provided by unshowned line tube in the accompanying drawings, and by upper thread tensioning apparatus 29 (referring to Fig. 1 and Fig. 2) to determine and adjustable mode tensioning that described upper thread tensioning apparatus is installed on the installing plate of arm 2.

One needle gage adjuster transmission mechanism 30 is used to drive and has the materials and parts that move that move materials and parts portion section 18,19, and described needle gage adjuster transmission mechanism can be seen in the zone of substrate 4 in Fig. 1.

Shuttle

25,26 is rotated driving by a lower shaft 31 and a steering gear, and described lower shaft and steering gear are installed in respectively attaches troops to a unit in the shuttle

drive mechanism housing

32,33 of

shuttle

25,26.

Two secant device assemblies are used to cut off upper thread and bottom line, and one of them secant device group 34 is whole shown in Figure 36, wherein can see the cutting cam body in Fig. 1 and Fig. 2

35, described cutting cam body can be connected to handle wire scraper 37 (referring to Figure 36) by one stroke electromagnet 36.Described cutting cam body 35 is connected with lower shaft 31 in mode in relative rotation.

In two secant device groups 34 each is used to cut off the upper thread and the bottom line of a pair of mutual correspondence.

The switching device shifter 38 of one shank changeover module 39 is used for optionally stopping one sewing work of two

shanks

9,10, and described shank changeover module integral body is shown in Fig. 3 to Fig. 7 and at length shown in Fig. 8 to Figure 16.Utilize switching device shifter 38 between three duties of Sewing machines 1, to change.In the position of the switching device shifter shown in Fig. 3 to Fig. 5 38, two

shanks

9,10 all are access in, promptly participate in sewing work.In the position of the switching device shifter shown in Fig. 6 to Figure 12 38, left shank 9 is access in, promptly participates in sewing work, and right shank 10 is moved out of, promptly remains in the resting position in the top dead centre zone.Correspondingly, can also form the 3rd operating position, wherein insert right shank 10 and shift out left shank 9 by switching device shifter 38.

The basic functional principle of such switching device shifter is known by DE-PS 955023.

Switching cam/contact cam 40 is used to make switching device shifter 38 to change between three duties.In the operating position of inserting two shanks 9,10, switch cam 40 and be between two changer lever/feeler levers 41, described changer lever is separately positioned on the upper end of two shanks 9,10.In the corresponding outflow location that shifts out one of two shanks 9,10 respectively of switching device shifter 38, switch cam 40 by switching acting surface down

42 (referring to Figure 10 and 13) and changer lever 41 actings in conjunction on the switching end/contravention 43 of corresponding shank.One can manned operating element 45 (referring to Fig. 3) be used to make and switch cam 40 and move between its different switching position, and described operating element 45 has one and switches handle 46 and a handle 47 that resets.Operating element 45 is connected bar/starting handle 50 (referring to Figure 10) by a trunnion axis 48, a changer lever 49 and and mechanically is connected with the switching cam.In the zone that changer lever 49 and trunnion axis 48 are hinged, be provided with a back-moving spring 51 (referring to Fig. 4), described back-moving spring 51 and a stopper unit 52 actings in conjunction, the spring end 53 of described back-moving spring 51 is resisted against on the described stopper unit.Stopper unit 52 comprises that one is used to switch the pin 54 in the centre position of cam 40 between two changer levers 41.

One pin conveyer 55 is used for moving

shank

9,10, promptly being used for the pin transmission along sewing direction or direction of transfer 15 during acupuncture, and the shank side component of described pin conveyer 55 is for example shown in Fig. 3 and Fig. 5.Described pin transmits by needle bar frame 56 is carried out around an axis of oscillation 57 swings, and the form of described needle bar frame is the rocker that externally guides two shanks 9,10.Axis of oscillation 57 is parallel to supporting plate 13.Axis of oscillation 57 with switch cam 40 at a distance of greater than 10mm, in shown embodiment at a distance of several centimetres.Swing around axis of oscillation 57 drives by a thrust axis 58 that extends along described axis of oscillation 57.The shank side end of thrust axis 58 is connected with guiding rocker 56 in mode in relative rotation.Described guiding rocker 56 has guide portion section 59 on, and the described guide portion section 59 that goes up is connected with guide portion section 60 once.Described down guide portion section 60 is connected in mode in relative rotation by a control arm 61 and thrust axis 58 again.

Switch cam 40 and so design (referring to Figure 10 and Figure 13), make and switch the oscillating motion that transmission is carried out based on pin that acting surface 42 is followed the switching end 43 of shank.At this, the switching cam 40 shown in Figure 10 be in switch end 43 in the pin delivering position of pin transport process end, the pin side end 44 that promptly is in a

shank

9,10 be offset on sewing direction 15 in the position of maximum.Figure 13 illustrate switch end 43 with the peak excursion corresponding position of shank on the direction opposite with sewing direction 15.

Switch cam 40 being bearing on the switching Cam rest 63 that is fixed on the body around the mode that a switching cam axis of oscillation 62 parallel with axis of oscillation 57 swung.In order to switch the handover operation of cam 40, to connect bar 50 and pass through one a follower/conjunction 64 and a pilot slot that in switching cam 40, forms 65 and switch cam 40 actings in conjunction, described follower is fixedlyed connected with connection bar 50.So just with switched cam 40 irrespectively, guaranteed that reliable actuation force is connected connecting bar 50 and switch between the cam 40 around the swing position of switching cam axis of oscillation 62.

Connect bar 50 and be connected (for example referring to Fig. 7) with changer lever 49 by a back-moving spring 66.Back-moving spring 66 has been guaranteed: when switching cam 40 when side direction runs into one of the changer lever 41 of corresponding to be switched

shank

9,10, can avoid switching the actuating movement towards changer lever 41 of cam 40 against the preload of back-moving spring 66, the sewing movement by corresponding

shank

9,10 moves downward and is enough to be displaced in the switching position above changer lever 41 switching cam 40 up to changer lever 41 always.

The detailed structure that shows the crank driving mechanism 8 of the sewing operation up and down that is used for

shank

9,10 by Fig. 3 to Figure 16.What crank driving mechanism 8 comprised one slide block/cross hair style can be by follower 67 drivingly up and down, described follower 67 (for example shown in Figure 5) is under the sewing state of corresponding

shank

9,10, at axial restraint between operation stop part on one and the following operation stop part 69 that can switch by switching device shifter 38, and the described stop part that upward moves all is designed to a baffle ring 68 in two

shanks

9,10 each.Under move stop part 69 and respectively comprise three backstop balls 70, described backstop ball is pulled to a stop dog position when discharging changer lever 41.In described stop dog position, outside the shell wall of backstop ball 70 protruding corresponding

shanks

9,10, make the internal diameter of the effective external diameter that obtains thus of

shank

9,10 greater than the respective needle rod guide of slide block 67.

In two baffle rings 68 each all utilizes fastening bolt to be axially fixed on the corresponding shank 9,10.Baffle ring 68 moves stop part as being used for going up of slide block 67.

Slide block 67 drives with main shaft (referring to for example main-shaft axis in Fig. 5 5) by a crank 71 and is connected.

The last guide portion section 59 of guiding rocker 56 has leads rib 72 (for example referring to Fig. 5).The following guide portion section 60 of guiding rocker 56 has leads rib 73 on one.Leading rib 73 on described turns up the soil at interval and is arranged on down the below of leading rib 72.

Switching device shifter 38 is provided with the following rest stop 74 that can switch in two

shanks

9,10 each, and described rest stop down can be set to a stop dog position (referring to Figure 16) by handling corresponding changer lever 41.In two following rest stop 74 each comprises three backstop balls 70 of the backstop ball type of operation stop part 69 down.The backstop ball 70 of following rest stop 74 is led the interior oblique cutting part acting in conjunction of rib 73 in stop dog position with on the following guide portion section 60, outside the shell wall of the protruding again corresponding

shank

9,10 of backstop ball described in the described stop dog position.

Under static state, promptly under the state that shifts out of handling changer lever 41, the

shank

9,10 that is moved out of guides on the rocker 56 (referring to Figure 16) in last rest stop 75 and switchable axially being fixed between the rest stop 74 down.Last rest stop 75 is provided by the top edge of corresponding baffle ring 68.

May between the off-position of a sedimentation and a stop dog position, switch backstop ball 70 by handling corresponding changer lever 41, do not have backstop action at backstop ball described in the described off-position, outside backstop ball 70 described in the described stop dog position stretches out the shell wall of corresponding

shank

9,10 and have a backstop action.About following rest stop 74, described backstop action mean with backstop ball 70 be resisted against guiding rocker 56 following guide portion section 60 on lead on the rib 73.About under move stop part 69, described backstop action means backstop ball 70 is resisted against on the slide block 67.

In the stop dog position outside the shell wall of the protruding corresponding

shank

9,10 that moves stop part 69 or following rest stop 74 down, backstop ball 70 is elastically biased toward towards stop dog position.Correspondingly, following rest stop 74 is designed to, and makes described rest stop down be elastically biased toward towards 75 pairs of corresponding shanks that shift out 9,10 of last rest stop.Must guarantee when this external shank 9 and/or 10 operations: the top edge of baffle ring 68 is not resisted against down leads on the rib 72.Guaranteed thus: with the top dead centre of the slide block 67 of baffle ring 68 interlocks in, the accurate following distance of leading rib 72 apart from the top edge of baffle ring 68 of the last guide portion section 59 of regulation guiding rocker 56.This has guaranteed that also slide block 67 can not hit on the baffle ring 68 that is being clamped between rest stop 75 and the following rest stop 74 when

shank

9,10 is moved out of.

One distance adjusting means 76 is used for adjustable range, and described distance adjusting means 76 is designed to an eccentric adjuster, and this is shown specifically in Figure 15.The horizontal level level of axis of oscillation 57 of thrust axis 58 (intersection point as two

boost line

57a and 57b in Figure 15 illustrates) and main-shaft axis 5 is at a distance of an offset E (referring to the boost line 5a in Figure 15).By the modulability of thrust axis 58 is rotated, last guide portion section 59 following that can vertically regulate the position of guiding rocker 56 and then regulate guiding rocker 56 with respect to the position of

shank

9,10 lead rib 72 apart from slide block 67 lead under described rib 72 on lead the distance of rib.Described distance minimum greater than baffle ring 68 along the thickness on the axial direction of shank 9,10.In the embodiment shown, offset E is 0.2mm, promptly less than 1mm.

Figure 17 to Figure 24 illustrates other parts that form is the pin conveyer 55 of linkage 77.Described linkage 77 is installed in the column 3 of Sewing machines 1.Linkage 77 has a drive rod 78, and described drive rod 78 is connected with the horizontally extending abreast driving shaft 79 of thrust axis 58 with mode in relative rotation and needle gage adjuster transmission mechanism 30.Drive rod 78 is connected with a pull bar 81 by first linkwork 80.Pull bar 81 is that another linkwork 82 and one of link bolt unit send shank 83 hinged by a form.Send shank 83 with the opposed end of hinge axes 82a (referring to Figure 19) of another linkwork 82 on be connected with thrust axis 58 in mode in relative rotation.Realized in the pin transmission of linkage 77 (shown in Figure 17 to Figure 19) is adjusted: the intermittent exercise of driving shaft 79 is converted into the oscillating motion (referring to double-head arrow 84) of drive rod 78 and correspondingly is converted into the oscillating motion (referring to double-head arrow 85) of sending shank 83.Correspondingly, drive thrust axis 58 off and on, make

shank

9,10 for example two between the delivering position shown in Fig. 9 and Figure 12, swing translatory movement.

Figure 20 to Figure 22 shows the off-position of linkage 77, and the pin transmission is not worked, promptly do not carried out to pin conveyer 55 in this position.In described off-position, pull bar 81 is not to sending shank 83 to apply the driving effect, even make the described shank that send still keep static when drive rod 78 carries out oscillating motion 84.In described off-position, send shank 83 to be connected with the rack unit 85a of Sewing machines 1 regularly by link bolt 82.

In off-position, pull bar 81 is connected with sending shank 83 by one elongated hole/pin connected construction 86, and described elongated hole/pin connected construction has one and is fixed on the sliding pin 87 and that send on the shank 83 and is formed on elongated hole 88 on the pull bar 81.Sliding pin 87 is pressed into and send in the shank 83.Elongated hole 88 is designed to the guiding fork of pull bar 81.Because elongated hole/pin connected construction 86, the lengthwise movement of pull bar 81 (referring to double-head arrow 89) dry running (other parts not being worked) guarantees simultaneously that wherein pull bar 81 is sending on the shank 83.

Figure 23 and Figure 24 illustrate the dislocation of linkage 77, in order to extremely to change described linkage according to Figure 17 between the off-position shown in Figure 22 to delivering position shown in Figure 19 and according to Figure 20.Said link bolt unit 82 split pines.In Figure 24, can make send shank 83 from according to Figure 20 to the clockwise swing in fixed position shown in Figure 22, up to arriving according to Figure 23 and installation site shown in Figure 24.In described installation site, sliding pin 87 does not engage with elongated hole 88, thereby can change pull bar to off-position shown in Figure 24 and at Figure 17 between the delivering position shown in Figure 19 at Figure 20.

Set forth shuttle assembly 24 by Figure 25 to Figure 35 below, except two

shuttles

25,26, described shuttle assembly also comprises the shuttle driven unit.Two shuttles 25,26 are respectively by 90,91 supportings of shuttle bearing.At this, shuttle bearing 90 belongs to shuttle 25 and shank 9 and is the part of shuttle drive mechanism housing 32.Shuttle bearing 91 belongs to shuttle 26 and shank 10 and is the part of shuttle drive mechanism housing 33.

Figure 26 to Figure 35 shows lower shaft 31 and be installed in each parts on this lower shaft in the zone of shuttle bearing 90.In the zone of shuttle bearing 91, have corresponding, about vertical axis with 180 ° of rotational symmetric arrangements.

Two

shuttle bearings

90,91 are fixed on the lower shaft 31 at each interval, the synchronized movement of described lower shaft and

11,12 ground, promptly synchronously rotate with main shaft.

In two

shuttle bearings

90,91 zone separately, lower shaft 31 is surrounded by the

hollow shaft part

92,93 that is connected with lower shaft 31 respectively in mode in relative rotation respectively.By a bevel gear 94 (referring to Figure 26 to Figure 28) that is connected in mode in relative rotation with corresponding

hollow shaft part

92,93,

hollow shaft part

92,93 forms drivings by a shuttle driving shaft with corresponding

shuttle

25,26 and is connected respectively.Be that each

hollow shaft part

92,93 synchronously rotates with corresponding

shuttle

25,26 respectively.

One fastening screw 95 is used for shuttle bearing 90,91 is fixed on lower shaft 31, and described fastening screw radially passes the adjustment sleeve 96 that surrounds corresponding

hollow shaft part

92,93 and is tightened.For this reason, adjustment sleeve 96 has internal thread radially, the external screw thread complementation of described internal thread and screw rod 95.Attached troops to a unit fixed thereon in the lump to two

shuttle bearings

90,91 of two each that adjust in the sleeve 96.

Screw rod 95 have a through hole 98 that distolateral fastening 97 fastening part section is passed corresponding hollow shaft part 92,93.Show as Figure 28 and Figure 31 to 33: through hole 98 does not allow corresponding

hollow shaft part

92,93 to have end-play, but allows to have play on the circumferential direction of lower shaft axis 98a.

Abut in for fastening 97 on the interface 99 with described fastening complementation, described interface for example is designed to slabbing portion in the shell wall 100 of lower shaft 31.Replace the design on plane, interface 99 can be designed to " V " groove.In a word, interface 99 is not designed to the rotation 98a rotation symmetry about lower shaft 31.

Adjusting sleeve 96 is parts of fixture 101, even described fixture be used for tear open from interface 99 fastening of the solid screw rod 95 of degree of tightness 97 o'clock, also keep corresponding

hollow shaft part

92,93 around the circumferential relative position of rotation 98a with respect to fastening screw 95.

Except that adjusting sleeve 96, fixture 101 also comprises two other fastening screws 102.Described fastening screw is a retainer, and described retainer will be adjusted sleeve 96 and be fixed in its circumferential relative position with respect to corresponding hollow shaft part 92,93.Two fastening screws 102 are respectively through adjusting the internal thread of sleeve 96, the external screw thread complementation of described internal thread and corresponding fastening screw 102.On distolateral fastening 103 shell wall 104 that abuts in corresponding

hollow shaft part

92,93 of fastening screw 102.Clamp the regional adjacent of corresponding

hollow shaft part

92,93 with corresponding fastening screw 102, in corresponding

hollow shaft part

92,93, be provided with the wall thickness reduction portion that a form is a recess 105.

Interface 99 marks with " S " in Figure 28 along the length of the rotation 98a of lower shaft 31.In the relative axial position (shown in Figure 28) of fastening screw 95 with respect to lower shaft 31, interface 99 stretches out possible moving axially apart from " U " in the axial direction left, to the right respectively outside fastening screw 95.On the axial height of fastening screw 95,

hollow shaft part

92,93 have respectively a form for around boss 105a, interior wall thickness increase portion.

By tearing the corresponding fastening screw 95 of pine open, corresponding shuttle bearing 90,91 is moved vertically with respect to lower shaft 31, thereby can particularly regulate two spacings between the shuttle tip 27.Because corresponding

hollow shaft part

92,93 is fixedlyed connected with fastening screw 95 with described two other fastening screws 102 by adjusting sleeve 96, so based in adjustment process because described 97,99 complimentary to one another and to the maintenance of fastening screw 95 with respect to the circumferential position of lower shaft 31, corresponding

hollow shaft part

92,93 is constant with respect to the circumferential relative position of lower shaft 31 in described adjustment process.After regulating the distance between two

shuttle bearings

90,91 and tightening fastening screw 95, (still) guarantees that the needle bar stroke of shuttle most advanced and sophisticated 27 and

shank

9,10 is synchronously to catch upper thread exactly thus.

As Figure 32 and shown in Figure 33, for the metering needle throw of lever can be regulated corresponding hollow shaft part 92 from one according to the centre position of Figure 31 around rotation 98a.Figure 32 is illustrated in this adjusting of carrying out with angle of circumference V on first circumferential direction, and Figure 33 is illustrated in the reverse adjusting of carrying out with identical value V on the opposite circumferential direction.According to regulated value V, can change and then regulate shuttle most advanced and sophisticated 27 and

corresponding shank

9,10 the needle bar stroke position synchronously.

Recess 105 prevents to occur sealed with fastening 103 friction (reibschl ü ssig) and contacts in fastening 103 outer edge region of corresponding fastening screw 102, and then prevents corresponding

hollow shaft part

92,93 unintentional rotation with respect to lower shaft 31 when tightening fastening screw 102.

Before moving corresponding shuttle bearing 90,91, also tear loose set bolt 106 open, utilize described set bolt 106 that shuttle bearing 90,91 is threaded with substrate 4 in frame side.

On corresponding

hollow shaft part

92,93, except that bevel gear 94 is installed, also be separately installed with the disc cam 107 of a bobbin case opener.

In the zone of shuttle bearing 90,91, lower shaft 31 is respectively by a bearing 108 supportings.

Figure 36 to 59 intactly or with sub-component illustrates secant device assembly 34.In the active position of electromagnet 36 that hoists, follow body 109 and on the cutting cam 110 of cutting cam body 35, roll and cause the cutting movement of wire scraper 37 by making one.Following body 109 lifting by a driving element 111 and stroke electromagnetic iron 36 112 and wire scraper 37 acts on and is connected (referring to Figure 36).Driving element 111 supports in the mode that is fixed on the body, makes described driving element carry out rotational motion around a shaft part 113 of driving element 111.

Except form was the wire scraper 37 of movable thread cutter, the thread cutting device 114 of secant device assembly 34 comprised that also one fixedly secures corresponding cutter 115 on the frame of Sewing machines 1 by corresponding shuttle bearing 90,91.

Figure 39 and Figure 40 illustrate the thread cutting device 114 that is right after after carrying out secant.The cutting edge 116 of wire scraper 37 when secant with the corresponding sword of corresponding cutter 115/oppositely sword acting in conjunction.Cutting edge 116 is defined by the cutting wall section 119 of the last wire scraper wall 119a of collection groove (fanggut) 118 of wire scraper 37 and wire scraper 37, and described cutting wall section 119 overlaps with the plane of movement 120 (referring to Figure 40) of wire scraper 37 in its cutting movement.The opposite side of cutting edge 116, promptly with cutting wall section 119 opposed sides on, wire scraper wall 119a carries out the transition to and plane of movement 120 spaced walls section 121 separately.Described spaced walls section 121 forms by last wire scraper wall 119a is carried out the concave surface grinding.Because spaced walls section 121, wire scraper only contact with corresponding cutter 115 near cutting edge 116 when secant, the motion arrow 122 of described wire scraper when secant and among Figure 42 moves accordingly.

Spaced walls section 121 apart from the distance A of plane of movement 120 (referring to Figure 40) on mathematical meaning strictly monotone ground along with this spaced walls section 121 increases apart from the increase of the distance of cutting edge 116.

On spaced walls section 121, be provided with a control band 123 (referring to Figure 50) adjacent with cutting edge 116.Described control band represents that by two vertically short boundary lines described boundary line is extended from spaced walls section 121 downwards in Figure 50.Control band 123 is configured to apart from B (referring to Figure 50) apart from cutting edge 116, when wire scraper 37 in control band 123, do not stress ground, promptly do not have when abutting on the corresponding cutter 115 under the situation of pressure effect, have correct cutting force, be correct cutting pressure, described cutting pressure imposes on corresponding cutter 115 by wire scraper 37 on cutting edge 116 when secant.Control band 123 is marked on the wire scraper wall 119a by laser beam marking.The correct cutting pressure that is used for secant crosses between the height of the height of control band 123 and cutting edge 116 based on corresponding sword 117 and cuts/amount of coincidence/intersect amount (ü berschneidung) C (referring to Figure 50) and setting up.

In order to regulate cutting force, can between a plurality of corresponding cutter positions, move corresponding cutter 115, the corresponding different corresponding sword 117 of described a plurality of corresponding cutter positions apart from the distance of plane of movement 120, be that different mistakes is cut C.For this reason, corresponding cutter 115 can move between different swing position around the swinging joint 124 with axis of oscillation 125, and can be by set bolt 126, promptly regulate bolting so that a given cutting force immobilizes by cutting force.Set bolt 126 is used for that simultaneously corresponding cutter 115 is fixed on corresponding knife support 127 and then is fixed on the frame of Sewing machines 1 by corresponding shuttle bearing 90,91.Allow corresponding cutter 115 along in Figure 42, carrying out relative positioning with respect to corresponding knife support 127 simultaneously by tearing loose set bolt 126 open by the direction of motion shown in the double-head arrow 128.On orientation 128, can also carry out the axial relative positioning of corresponding cutter 115 along axis of oscillation 125.

Swinging joint 124 has the jointed shaft of a band hinge axes 129.Corresponding cutter 115 is fixed on the described jointed shaft by fastening bolt 130.

In order to regulate cutting force, at first tear loose set bolt 126 open.Move wire scraper 37 with respect to corresponding cutter 115 then, mutually opposed up to corresponding sword 117 with the control band 123 on the last wire scraper wall 119a.Then, swing corresponding cutter 115 around axis of oscillation 125 always, up to corresponding sword 117 in control band 123 central authorities, abutting under the uncharged situation on the wire scraper wall 119a.Then, under the situation that keeps corresponding cutter position, tighten set bolt 126.

When carrying out secant, at first wire scraper 37 is in Figure 43 to position shown in Figure 47.Because the concave surface grinding in spaced walls section 121, wire scraper 37 beginnings do not contact with corresponding cutter 115.In the incipient stage of wire scraper 37 secants motion also is so, moves to the degree that wire scraper 37 contacts with corresponding cutter 115 up to wire scraper 37 with respect to corresponding cutter 115 in control band 123.In another motion of wire scraper 37, cut C and set up a predetermined cutting force based on crossing, thereby when the corresponding sword 117 of the corresponding cutter 115 of cutting edge 116 processes of wire scraper 37, correctly to carry out secant.

The concave surface grinding of spaced walls section 121 can easily be passed through the first motion portion section of wire scraper 37 when cutting movement.

Thread cutting device 114 also has a wire clamp 131 of being made by elastomeric material, for example spring steel except that having wire scraper 37 and corresponding cutter 115.Described wire clamp and wire scraper 37---this wire scraper forms a corresponding body---acting in conjunction is to be clamped in the line that cuts off between wire scraper 37 and the corresponding cutter 115.Wire clamp 131 is designed to the sheet spring and has one keep spring end 132 (referring to Figure 59) and freely to clamp end 133, utilizes described maintenance spring end that wire clamp 131 is fixed on one and is used as on the corresponding knife support 127 of supporting mass at this.

One regulating element 134 for example shown in Figure 55 is used to regulate the clamping pressure of wire clamp 131 relative wire scrapers 37.Regulating element 134 can be moved and between two spring ends 132,133 wire clamp 131 be acted on an adjustable pressure.Regulating element 134 is designed to be screwed in the corresponding knife support 127 and the adjusting bolt of self-locking.

In the position according to Figure 53 to Figure 55, adjusting bolt 134 is set at an off-position and does not engage with wire clamp 131.In described position, need only in the position after wire scraper is located at secant, the clamping end 133 of wire clamp 131 is just abutting on the wire scraper 37 under the less line tension.

Figure 56 to 59 illustrates the regulating element 134 that engages with wire clamp 131.Wire clamp 131 is keeping spring end 132 to be mentioned by the abutment wall 135 from corresponding knife support 127 owing to the effect of regulating element 134 with clamping between the end 133, thereby, clamp end 133 and just be pressed against strongly on the wire scraper 37 as long as wire scraper is in the position behind the secant.Bond strength by regulating element 134 and wire clamp 131 can be to regulating at the load/stress that clamps between end 133 and the wire scraper 37.This adjusting can wire clamp 131 with respect to the clamped position of wire scraper 37 in carry out.

Figure 60 to Figure 66 is illustrated in detail in the supporting plate 13 in the zone of needle plate 14.Needle plate 14 is fixed on the supporting plate 13 and then is fixed on the substrate 4.The upside of needle plate 14 flushes with the upside of the supporting plate 13 that surrounds described needle plate.

In Figure 61, in abutting connection with the left side and the right side of needle plate 14, two can be fixed on the supporting plate 13 from the needle plate slide block 136,137 that supporting plate 13 takes off and then are fixed on the substrate 4.The upside of two needle plate slide blocks 136,137 flushes with the upside of needle plate 14 and flushes with the upside of the supporting plate 13 that surrounds needle plate slide block 136,137.Two needle plate slide blocks 136,137 form the cover piece that can take off from the accessaries of sewing machine being installed in the substrate housing, particularly

shuttle

25,26.

Prevent that by a fixed structure 138 (referring to Figure 63 and 64) two needle plate slide blocks 136,137 from relatively moving with respect to supporting plate 13 and then with respect to substrate 4 respectively.Below, be combined in the needle plate slide block 137 that is positioned at the right side among Figure 61 and come fixed structure 138 is set forth.In addition, with about the centrosymmetric mode of mid point between two pinpricks 20,21, for the needle plate slide block 136 that is positioned at the left side in Figure 61 is provided with fixed structure 138.

Fixed structure 138 has the fixing locking projections 139 of needle plate, and described locking projections is a body section that is fixed on the sheet spring 140 on the needle plate slide block 137.In sheet spring 140 fixed position shown in Figure 63 by prestrain.In described fixed position, locking projections 139 engages the heavy portion of cutting of latch recess 141.Latch recess 141 is parts of lockplate 141a, and described lockplate is fixed on the supporting plate 13 by a set bolt 141b and then is fixed on the substrate 4.Sheet spring 140 is installed between needle plate slide block 137 and the clamping plate 142, and described clamping plate can move relative to the needle plate slide block in the mode perpendicular to the surface of needle plate slide block 137.

In the fixed position of fixed structure 138 (shown in Figure 63), needle plate slide block 137 can not move along the direction of motion 143, promptly can not leave needle plate 14.In this fixed position, prevent that needle plate slide block 137 is with respect to supporting plate 13 and then relatively moving with respect to substrate 4.

Utilize one to go fixed structure 144 to change fixed structure 138 between fixed position and off-position (shown in Figure 64), needle plate slide block 137 can relatively move with respect to supporting plate 13 and then with respect to substrate 4 along the direction of motion 143 in described off-position.Shown in Figure 64, locking projections 139 groove 141 that goes out of lock in the off-position.

Go fixed structure 144 to go retainingf key to implement by one, the described retainingf key that goes can touch from the upside of supporting plate 13 and then from the upside of substrate 4, and with locking projections 139 actings in conjunction.This acting in conjunction realizes in the following manner indirectly: by removing fixed structure 144 (in Figure 63) and making clamping plate 142 and then make the sheet spring 140 with locking projections 139 be moved down into off-position (according to Figure 64) from the top by activating exerting pressure of pressure head 145.After arriving the off-position, needle plate slide block 137 can be with going fixed structure 144 to move and then leave needle plate 14 with respect to supporting plate 13 on the direction of motion 143.

When the direction of motion 143 was slided, described needle plate slide block was guiding by a guiding device 146 on the supporting plate 13 and then on substrate 4 at needle plate slide block 137.The guide groove 147 of described guiding device by in supporting plate 13 thereby in substrate 4 forms, and joins in the described guide groove as the spring 148 of the part of sheet spring 140.Because the elastic reaction of sheet spring 140 in guiding device 146 can utilize corresponding adjusting bolt to regulate the flush position of the upside of needle plate slide block 137 with respect to the upside of supporting plate 13.

Assembling is during Sewing machines 1 in factory, utilize a pin rod 149 as aid to be adjusted in the play between locking projections 139 and the latch recess 141, described pin rod passes needle plate slide block 137 and sheet spring 140 from the top by a hole 150 and a mating holes 151.By the oscillating motion (referring to the double-head arrow in Figure 62 152) of pin rod 149, under abutting in situation on the needle plate 14, needle plate slide block 137 can accurately be scheduled to locking projections 139 distance apart from latch recess 141 on the direction of motion 143.

Clamping plate 142 are threaded with needle plate slide block 137 by set bolt 153.

Claims

1. thread cutting device (114) that is used for Sewing machines (1),

-described thread cutting device has movable thread cutter (37),

-described thread cutting device has the corresponding cutter (115) that can fixedly secure on sewing machine frame (4),

The cutting edge (116) of-wherein said thread cutter (37) is defined by the cutting wall section (119) of the last thread cutter wall (119a) of described thread cutter (37), described cutting edge when secant with corresponding sword (117) acting in conjunction of described corresponding cutter (115), described cutting wall section (119) overlaps with the plane of movement (120) of described thread cutter (37) in cutting movement

It is characterized in that,

The described thread cutter wall (119a) of going up carries out the transition to and plane of movement (120) spaced walls section (121) separately at the opposite side of described cutting edge (116), makes described thread cutter (37) only contact with described corresponding cutter (115) near described cutting edge (116) when secant.

2. thread cutting device according to claim 1 is characterized in that, described spaced walls section (121) is apart from distance (A) strictly monotone ground increase along with the increase of the distance of this spaced walls section described cutting edge of distance (116) of described plane of movement (120).

3. thread cutting device according to claim 1 and 2, it is characterized in that, on described spaced walls section (121), be provided with a control band (123) adjacent, do not abut on the described thread cutter (37) for regulating secant power with stressing at corresponding cutter described in the described control band (115) with described cutting edge (116).

4. according to each described thread cutting device in the claim 1 to 3, it is characterized in that, described corresponding cutter (115) can move between a plurality of corresponding cutter positions to regulate cutting force, and described a plurality of corresponding cutter positions have the distance of different described corresponding cuttves (115) apart from described plane of movement (120).

5. thread cutting device according to claim 4 is characterized in that, described corresponding cutter (115) can center on swinging joint (124) and move between different swing position.

6. thread cutting device according to claim 5 is characterized in that, a set bolt (126) is used for fixing described swinging joint (124), is used for simultaneously described corresponding cutter (115) is fixed on sewing machine frame (4).

7. according to each described thread cutting device in the claim 1 to 6, it is characterized in that, one set bolt (126) is used for fixing described swinging joint (124), is used to stipulate the relative axial position of described corresponding cutter (115) along the axis of oscillation (125) of described swinging joint (124) simultaneously.

8. according to each described thread cutting device in the claim 1 to 7, it is characterized in that described thread cutter (37) is designed to wire scraper.

9. Sewing machines that has according to each described thread cutting device (114) in the claim 1 to 8.