CN1746371B - Sewing machine with stitch breaking device - Google Patents
Sewing machine with stitch breaking device Download PDFInfo
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- CN1746371B CN1746371B CN2005101037076A CN200510103707A CN1746371B CN 1746371 B CN1746371 B CN 1746371B CN 2005101037076 A CN2005101037076 A CN 2005101037076A CN 200510103707 A CN200510103707 A CN 200510103707A CN 1746371 B CN1746371 B CN 1746371B
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- cutting knife
- movable cutting
- needlework
- fixed
- needle plate
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- 238000009958 sewing Methods 0.000 title claims abstract description 54
- 239000004744 fabric Substances 0.000 claims abstract description 32
- 238000010417 needlework Methods 0.000 claims description 68
- 230000009471 action Effects 0.000 claims description 28
- 230000000694 effects Effects 0.000 claims description 12
- 238000009434 installation Methods 0.000 claims description 9
- 230000002093 peripheral effect Effects 0.000 claims description 8
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- 238000009966 trimming Methods 0.000 description 12
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Images
Classifications
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- D—TEXTILES; PAPER
- D05—SEWING; EMBROIDERING; TUFTING
- D05B—SEWING
- D05B65/00—Devices for severing the needle or lower thread
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- D—TEXTILES; PAPER
- D05—SEWING; EMBROIDERING; TUFTING
- D05B—SEWING
- D05B37/00—Devices incorporated in sewing machines for slitting, grooving, or cutting
- D05B37/04—Cutting devices
- D05B37/06—Cutting devices with oscillating tools
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- D—TEXTILES; PAPER
- D05—SEWING; EMBROIDERING; TUFTING
- D05B—SEWING
- D05B57/00—Loop takers, e.g. loopers
- D05B57/02—Loop takers, e.g. loopers for chain-stitch sewing machines, e.g. oscillating
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- D—TEXTILES; PAPER
- D05—SEWING; EMBROIDERING; TUFTING
- D05B—SEWING
- D05B73/00—Casings
- D05B73/04—Lower casings
- D05B73/12—Slides; Needle plates
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- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Sewing Machines And Sewing (AREA)
Abstract
A thread shear device is used in a multi-needle cylinder sewing machine to sew sleeve-shaped parts such as the collar and the cuff of a T shirt, wherein a long skew line shape is formed along the back side of cloth feeding and the oblique direction away from a cloth feeding groove; therefore, the blade edge of a fixed cutter and the free end edge of a thread gripper plate forming the thread shear device swing according to the reciprocating drive of a movable cutter, and move between a thread hooking part arranged at the front end and a part adjacent to a base end; meanwhile, the swinging within the entire reciprocating drive swinging scope of the movable cutter is held and guided between the fixed cutter and the thread gripper plate; through fixing the fixed cutter and the thread gripper plate on the backside of a needle plate under the condition that a side parallel to the cloth feeding direction of the needle plate does not protrude outwards, a convex camber protruding towards one side does not form on a cylindrical pedestal; therefore, a sleeve-shaped part can be easily inserted into the cylindrical pedestal to complete sewing according to requirements; moreover, the thread shear device is in a dispersed state after load is cut off, thereby maintaining excellent sharpness and thread shear function for a long time.
Description
Technical field
The present invention relates to around the collar that is applicable to T-shirt for example and the Sewing machines of the band cutting facility that make at tubular position that the stitching of cuff and covering is stitched etc.Specifically be, relate to having and be applicable to the cartridge type base of making at the tubular position, on the free end of this cartridge type base, fixing the needle plate that has a plurality of needle falling holes and carry out the groove that the feed dog of work feed uses towards cylinder axis direction orthogonally with cylinder axis direction, be provided with looper in this needle plate bottom, have simultaneously and will pull to the Sewing machines of the spininess cartridge type of the cutting facility that the side cuts off at the needlework between needle plate and the looper and looper thread after making at the sidepiece of needle plate.
Background technology
Cutting facility in the Sewing machines of this spininess cartridge type comprises: leading section be bent to hook-shaped, week has hook line portion, this hook line portion can back and forth drive swing in horizontal plane with the form of a plurality of needle falling holes of cross-section needle plate a movable cutting knife in its bent front ends; Will this movable cutting knife return when swing row be hooked in before cutting off between end hook line portion and many needlework transferring to the needle falling hole side and looper thread, utilization and the movable cutting knife act on the fixed cutting tool that cuts off; But the swing that contacts with movable cutting knife, will this movable cutting knife flexibly is held on and fixed cutting tool between channeling conduct and will cut off after the thread end resilient clamp in and movable cutting knife leading section between clamp.
Sewing machines as the band cutting facility that constitutes by above-mentioned inscape, in the past, reality as the open communique of Japan Patent utility model is opened the record that flat 1-79477 communique is done, known have following a kind of structure: portion is provided with erecting bed in the side of needle plate, be located on the longitudinal axis of this erecting bed, supporting the base end part that leading section bends to hook-shaped movable cutting knife, this movable cutting knife has been constituted all formed hook lines portion in its bent front ends in horizontal plane, can back and forth drive swing with the form of cross-section a plurality of pin portions that fall, simultaneously described erecting bed is fixed in the configuration of rectangular fixed cutting tool and stage clip (clamp), form its knife edge and stage clip trip end margin near needle plate the position facing to the state that passes through the path of the needlework that connect needle falling hole.
Again, the record of being done as the fair 7-18392 communique of reality of Japan Patent utility model bulletin communique, also known have following a kind of structure: at the back side of the needle plate of the free end upper lateral part that is fixed in the cartridge type base, to bend to hook-shaped and the base shaft that its front end makes the movable cutting knife of hook-shaped cutting knife (hook line portion) shape will be supported on the position of the groove adjacency of using with feed dog, this movable cutting knife can back and forth rotate along the horizontal plane at the needle plate back side, use the front of groove simultaneously at the feed dog at the needle plate back side, fixed cutting tool and folder spring (clamp) are become under the state of and linearity parallel affixed with cloth feeding direction in the position that makes its knife edge and folder spring swim end margin, and, make the part of needle plate and cartridge type base not hinder bloating in the side rotationally of movable cutting knife.
Yet, in the Sewing machines of this band cutting facility, for contacting and the fault of conflict etc. of movable cutting knife and other member do not taken place, make movable cutting knife that runout ground not take place in whole reciprocal driving hunting range and be well on and stable swing seems very important along certain horizontal plane.For this reason, adopted will this movable cutting knife resilient clamp between fixed cutting tool and the clamp (being called stage clip) and to the device of this swing channeling conduct.
When adopting this clamping guiding device, in the former conventional case of opening that flat 1-79477 communique put down in writing in aforementioned reality, knife edge width and little rectangular fixed cutting tool and the clamp of trip end margin width have been used, the total length direction that is configured to these members is along getting over towards the base end part side, posture with the needle falling hole of needle plate distance incline direction far away more, so that the clamping pilot point of the fixed cutting tool of movable relatively cutting knife and clamp according to the swing of this movable cutting knife, moves variation successively from the knife edge of fixed cutting tool and near trip end margin to the part cardinal extremity of these members of clamp.Therefore, the base end part of fixed cutting tool and clamp protrudes a lot to the side of needle plate portion, for the base end part fixed bearing that will protrude, need erecting bed be set in addition again in the side of needle plate portion.Its result, not only increase the part number and assemble man-hour, and the cardinal extremity part of erecting bed, fixed cutting tool and clamp is protruded to a side of cartridge type base, if want its projection is accommodated in the inside of cartridge type base, then the part of cartridge type base just bloats to the side.Like this, will be when its free end side be inserted making that cartridge type base stipulates by the tubular position of sewings, because of being hooked etc. by projection and base convex camber at the tubular position, exist and to bring into play the work feed effect and then be difficult to the problem that puts rules into practice smoothly and reliably and make, therefore, the minimum diameter at the tubular position that can make itself also is restricted, the corresponding stenosis of the scope of application.
Again, in the latter's that real fair 7-18392 communique is put down in writing conventional case, though except that needle plate, do not need to use erecting bed, compare with the former conventional case and can reduce part number and assembling man-hour, but, in order not hinder movable cutting knife to rotate the part of needle plate and cartridge type base is bloated to the side, so will be when its free end side be inserted making that cartridge type base stipulates by the tubular position of sewings, exist and take place to be waited the problem the same with the former conventional case by hook, the minimum diameter at the tubular position that can make itself also is restricted, the same with the former conventional case, the scope of application is narrow.
And, at the former, in the latter's the conventional case, since all be must by the narrow and small knife edge of the width of fixed cutting tool simultaneously will by the hook line portion hook of movable cutting knife, transfer the many needlework and the looper thread that come to the side and cut off, so it is very big that line cuts off load, exist in short-term knife edge and be depleted (promptly, blade is damaged) or be out of shape and make sharpness decline, need frequently carry out the common problem that fixed cutting tool is changed.
Summary of the invention
In view of the above problems, the objective of the invention is to, provide and each inscape can be accommodated in the width of common in the past employed standard type needle plate, and at the unnecessary formation of a part of cartridge type base bellying to the side, even the tubular position of path can not hooked by the cartridge type base etc. yet, can be easily and successfully insert making of stipulating, and, even make line cut off load disperses and also can guarantee all the time the band cutting facility of the line cut-out function that sharpness is good under the situation of the long-term use of not changing cutting knife Sewing machines.
To achieve these goals, the Sewing machines of band cutting facility of the present invention comprises: the cartridge type base; Be fixed in this cartridge type base free end, have with a plurality of needle falling holes of its cylinder axis direction quadrature and be disposed at and carry out the needle plate of the feed dog of work feed towards cylinder axis direction before and after this needle falling hole with groove; Be located in the cartridge type base of this needle plate bottom, with the direction of described cloth feeding direction quadrature on carry out oscillating traverse motion looper; The axle that the leading section side is bent to is hook-shaped, week have hook line portion in its bent front ends, will be located at the rear side of described needle plate can back and forth drive the movable cutting knife of swing in the oscillating traverse motion path of described looper and the horizontal plane between the described needle plate as the center, with the form of the cross-section a plurality of needle falling holes of end hook line portion before described; Will this movable cutting knife return that when swing row be hooked in this hook line portion and many needlework transferring to the needle falling hole side and looper thread, utilization and movable cutting knife between cutting off and act on the fixed cutting tool that cuts off; Contact with described movable cutting knife, but the swing of this movable cutting knife flexibly is held on and fixed cutting tool between channeling conduct and will cut off after the thread end resilient clamp in and movable cutting knife leading section between clamp, it is characterized in that, described fixed cutting tool, its knife edge is along the rear side of getting over towards cloth feeding direction, use slot pitch from incline direction far away more with feed dog, form long skew lines shape, so that swing according to the reciprocal driving of movable cutting knife with the Elastic Contact point of movable cutting knife, moving variation between the part near its preceding end hook line part and its cardinal extremity, and the swing of movable cutting knife is held on channeling conduct between fixed cutting tool and the clamp in its whole reciprocal driving hunting range, simultaneously, described clamp, its trip end margin with the roughly same plan-position of the knife edge of described fixed cutting tool on, formed long skew lines shape along described incline direction, so that the swing of this movable cutting knife along the whole reciprocal driving hunting range of described movable cutting knife and described fixed cutting tool between be held the state of guiding, and, these fixed cutting tools and clamp are at the back side that is not fixed in needle plate from a side of needle plate with dual-side parallel with cloth feeding direction under the state that foreign side protrudes.
Employing has the present invention of above-mentioned feature structure, owing to the knife edge of the fixed cutting tool that clamping is guided movable cutting knife swing and the trip end margin of clamp, along the rear side of getting over towards cloth feeding direction, the slot pitch of using with feed dog is from incline direction far away more, formed long skew lines shape, so that both (fixed cutting tool and clamps) formed clamping pilot point is according to the reciprocal driving swing of movable cutting knife, between its preceding end hook line part and its base end part branch, move and change, therefore, even as the conventional case shown in the patent documentation 1, the base end part of fixed cutting tool and clamp does not protrude from the side portion of needle plate, also can bring into play the clamping guiding function and the trimming effect of movable cutting knife reliably, these fixed cutting tools and clamp can be accommodated in the width of the standard type needle plate of not setting up cutting facility, be fixed in its back side.Like this, do not need to be provided with in addition with the needle plate split, the erecting bed that is used for fixing fixed cutting tool and clamp base end part, can reduce the part number and assemble man-hour, and, also fully unnecessaryly form bellying in the part of cartridge type pedestal part to the side for the oscillating motion that might as well hinder movable cutting knife, realize the pathization and the miniaturization of cartridge type pedestal part as much as possible, its result, even by the path tubular position of sewings, also can under the state that is not hooked, insert making that the cartridge type base stipulates easily and successfully by free end, reduce the minimum diameter at the tubular position of making of the Sewing machines of this cartridge type base type, can enlarge the scope of application.
Again, owing to can make and be hooked by the preceding end hook line portion of movable cutting knife and transfer the many needlework and the looper thread that come to the side, cut-out is on one side moved along the knife edge of the length of fixed cutting tool in one side, disperse load not being concentrated on to make line cut off load under the situation of privileged site of knife edge, therefore, its effect is can suppress the loss (promptly, blade is damaged) because of knife edge and be out of shape the sharpness reduction that causes, even do not carry out the troublesome operations of frequent transposing fixed cutting tool, can guarantee all the time for prolonged period of time that also the high line of sharpness cuts off function.
In the Sewing machines of band cutting facility of the present invention, fixed cutting tool and the clamp fixed installation structure on the needle plate back side, so long as these installation portions do not protrude from the side of needle plate, any structure all can, particularly as described in the right item 2, on fixed cutting tool and clamp, the place ahead from the knife edge of its skew lines shape and trip end margin towards cloth feeding direction, will installation board parallel with cloth feeding direction or almost parallel integrally formed, install on the board at these, by screw member fixed cutting tool and clamp are fixed in the needle plate back side, adopt this structure, can in narrow space, guarantee fully long installation board, though fixed cutting tool and clamp be subjected to cutting off load can damaged or distortion yet, can be fixed in the needle plate back side reliably.
Again, as the movable cutting knife in the Sewing machines of band cutting facility of the present invention, at least be that the leading section side is bent to hook-shaped shape, particularly, preferably form following curved shape: promptly as described in the right item 3, have movable cutting knife return to greatest extent that row swings to and fixed cutting tool between the effect of cutting off under the line off-position time, unlike the outer peripheral edges of the outside side of a side of needle plate protrusion and when the past to greatest extent row of preceding end hook line portion of movable cutting knife swings to the hook line position of cross-section a plurality of needle falling holes with dual-side parallel with cloth feeding direction, be positioned at the inner peripheral of feed dog with the outside of groove.The movable cutting knife of this shape as mentioned above, even used the standard type needle plate of not setting up cutting facility, movable cutting knife is swung under the complete non-salient state from the needle plate side in its part, simultaneously that the width formation of this cardinal extremity part is wide as far as possible, can constitute wall thickness and approach but the big movable cutting knife of intensity.
Again, in the Sewing machines of band cutting facility of the present invention, driving mechanism as movable cutting knife can use any structure, particularly as described in the right item 4, preferably, base end part at described movable cutting knife, pin is protruding near the described oscillation center axle, by will with the expanding-contracting action of cylinder on the sidepiece outside that is installed in the sewing machine base portion that is connected in described cartridge type base base end side linkedly, the leading section and this pin that carry out the mobile drive link of the reciprocal driving of cloth feeding direction in the cartridge type base are chimeric, have constituted described movable cutting knife and can back and forth drive swing structure freely along with the expanding-contracting action of cylinder.
And, in the Sewing machines of band cutting facility of the present invention, as described in right item 5, preferably, set up following needlework press device: promptly, moment of beginning to transfer many needlework and looper thread being hooked to the effect of cutting off of each movable cutting knife of root line utilization and fixed cutting tool from the preceding end hook line portion of described movable cutting knife finish moment of cutting off during, derivation from the needle falling hole of described needle plate limits to many needlework in the upstream side position of online feed path, the needlework end after form cutting off not by resilient clamp between movable cutting knife leading section and clamp.Particularly as described in the right item 6, preferably, the action timing setting of needlework press device is become: be in the zero hour of the needlework push action of carrying out by described needlework press device than line and cut off zero hour of moving slightly earlier by movable cutting knife and fixed cutting tool, and, be in the finish time of its needlework push action than the finish time of cutting off action by the line of movable cutting knife and fixed cutting tool slightly a little later.This occasion, during before the line of movable cutting knife and fixed cutting tool cuts off end, make restriction by derivation to many needlework, be hooked in transferring and the cut-out end of cut needlework in the hook line portion of movable cutting knife to the side, can be under situation about not being held between movable cutting knife leading section and the clamp, become it is cut off the state that thread end hangs down as free end, therefore, when the tubular position after the sewing finishing being extracted operation from the cartridge type base, the formed resistance of resilient clamp power is inoperative, can easily and successfully the tubular position after the sewing finishing be extracted from the cartridge type base.Can further improve and make operation.
Description of drawings
Fig. 1 is the approximate three-dimensional map of 3 pin cylindrical sewing machine integral body of the Sewing machines of band cutting facility of the present invention.
Fig. 2 for the part of the same Sewing machines cross-sectional disconnected, being the vertical view at center near the cutting facility of major part.
Fig. 3 is the amplification longitudinal section at the X-X line position of Fig. 2.
Fig. 4 is the exploded perspective view of the cutting facility of the same Sewing machines.
Fig. 5 is the amplification plan view of the same cutting facility.
Fig. 6 is the amplification inclinating view of the same cutting facility.
Fig. 7 is the amplification longitudinal section of the major part of the same cutting facility.
The amplification plan view of Fig. 8 state during for the making usually of needlework press device of the same Sewing machines of expression.
Fig. 9 is the amplification plan view of the needlework push action state of the same needlework press device of expression.
Figure 10 is the timing diagram of the same needlework press device.
The specific embodiment
The Sewing machines M of the 3 syringe types of Fig. 1～shown in Figure 3, following quadrate part face forward from sewing machine base portion 2, adorning machine spindle in having extended, needle drive mechanism and push driving mechanism (because of these mechanisms well-known, Therefore, omited detailed construction and explanation thereof) Sewing machines prop up arm 3 and cartridge type pedestal part 1 thereof, on the free end of this cartridge type pedestal part 1, fixing needle plate 5 by screw 4, while is in the bottom of this needle plate 5, in adorning with cloth feeding direction (making travel direction) a intersect the looper 6 that carries out oscillating traverse motion on the b-c direction of (quadrature) and looper drive (because of these mechanisms well-known, Therefore, omited detailed construction and explanation thereof), and, be provided with and install and remove freely pedestal part cover 7 from its front at the free end of cartridge type pedestal part 1, surround around this pedestal part cover 7 will this looper 6 and looper drive.
Prop up the leading section of arm 3 at described Sewing machines, shank 8 and up and down liftable depression bar 9 that up and down reciprocatingly driving move with the state support that stretches out downwards, bottom at shank 8, by pin folder 10 3 pins 11 are installed on the direction with cloth feeding direction a quadrature side by side, simultaneously in the bottom of depression bar 9, be installed with by sewings by the presser feet 12 that is pressed on the needle plate 5.Again, described needle plate 5 left and right sides limit 5a, 5a form parallel with cloth feeding direction a, on described needle plate 5, be formed with 3 needle falling holes 13 with the cylinder axis direction quadrature of cartridge type pedestal part 2, while is in the front and back and the left and right sides of these needle falling holes 13, be formed with towards cylinder axis direction carry out work feed feed dog (because of these mechanisms well-known, the Therefore, omited) groove 14 of usefulness, and, at the back side of needle plate 5, be installed with the cutting facility 18 as the main composition key element such as movable cutting knife 15 described later, fixed cutting tool 16 and clamp 17.
From Fig. 3 of the concrete structure of representing described cutting facility 18 and Fig. 4～Fig. 6 as can be seen, the structure of movable cutting knife 15 is: the leading section side bends to hook-shaped, in its bent front ends, has the hook-like hook line 15a of portion week, and, its base end part 15b is fixedly connected on the back side of described needle plate 5 by bolt shaft 19, with this bolt shaft 19 is the center, the hook-like hook line 15a of portion of described front end can carry out the reciprocally swinging of arrow d-e direction with the form of cross-section 3 needle falling holes 13 in the oscillating traverse motion path of described looper 6 and the horizontal plane between the needle plate 5, have when return shown in the imaginary line that row swings to Fig. 5 and Fig. 6 be retracted into the position time, the outer peripheral edges 15c that protrudes unlike the outside side of a side 5a parallel of needle plate 5 and when the time toward the turnover position shown in the capable solid line that swings to Fig. 5 and Fig. 6 with cloth feeding direction a, be positioned at the shape of the work feed of needle plate 5 with the inner peripheral 15d of groove 14 outer fixs.
Sidepiece outside in described sewing machine base portion 2, as shown in Figure 2, the cylinder 20 that carries out expanding-contracting action on arrow f-g direction is installed, drive link 25 is inserted logical being supported in the described cartridge type pedestal part 1, by connecting block 22, axle 23, swing connecting bar 24 links with movable link 21 interlocks of this cylinder 20, can on arrow f-g direction, back and forth drive mobile, by with the leading section of this drive link 25 and reach near the base end part 15b of described movable cutting knife 15 pin 26 chimeric bindings, constitute and to make described movable cutting knife 15 on above-mentioned arrow d-e direction, back and forth drive swing freely by cylinder 20.
On the other hand, fixed cutting tool 16 in the cutting facility 18, when described movable cutting knife 15 return from the turnover position shown in the solid line of Fig. 5 and Fig. 6 the row swing to shown in the imaginary line of figure be retracted into the position time, when promptly swinging from arrow e towards the d direction, 3 needlework and 1 looper thread that will be hooked by the hook-like hook line 15a of portion of its front end and transfer to the side of needle falling hole 13, cutting off effect between utilization and the movable cutting knife 15 is cut off, again, clamp 17 by latch plate 27 flexibly pressed on movable cutting knife 15 below be in contact with it, with the swing resilient clamp of this movable cutting knife 15 in and described fixed cutting tool 16 between channeling conduct, and, with the thread end resilient clamp after cutting off in and the fore-end of movable cutting knife 15 between.
Shape with fixed cutting tool 16 of above-mentioned functions is: its knife edge 16a is along the rear side of getting over towards cloth feeding direction a, the groove 14 distances incline direction of using with feed dog far away more, formed long skew lines shape, so that swing according to the reciprocal driving of movable cutting knife 15 with the Elastic Contact point of movable cutting knife 15, moving variation near near the hook line 15a of portion fore-end and its base end part 15b between the part, simultaneously with the swing of movable cutting knife 15, in its whole reciprocal driving hunting range, be held in channeling conduct between fixed cutting tool 16 and the clamp 17, simultaneously with from the knife edge 16a of its skew lines shape towards the front side of cloth feeding direction a will be parallel with cloth feeding direction a installation board 16b integrally formed, install on the board 16b at this, fixed cutting tool 16 is fixed in the back side of needle plate 5 by screw member 28.
Again, described clamp 17, with the roughly same plan-position of the knife edge 16a of described fixed cutting tool 16, specifically be on the knife edge 16a from the fixed cutting tool 16 shown in Figure 7 position of protruding slightly, formed long skew lines shape along described incline direction, so that its trip end margin 17a will this movable cutting knife 15 in the whole reciprocal driving hunting range of movable cutting knife 15 swing be held on and fixed cutting tool 16 between channeling conduct, front side from the trip end margin 17a of its skew lines shape towards cloth feeding direction a simultaneously, installation board 17b that will be parallel with cloth feeding direction a is integrally formed, install on the board 17b at this, clamp 17 by have with elasticity push this clamp 17 trip end margin 17a the skew lines shape trip end margin 27a with install installation board 27b's that board 17b overlaps, the latch plate 27 that forms with clamp 17 similar shapes roughly, and then with state that OBL pressing plate 29 overlaps under by screw member 30, be fixed in the back side of fixed cutting tool 16.In addition, on the installation board 27b of latch plate 27, be formed with the slotted hole 27c of the elasticity pressing position that can adjust clamp 17.The back side at the needle plate 5 that fixed cutting tool 16, clamp 17, latch plate 27, pressing plate 29 are installed is formed with groove 5A.
As shown in Figure 1, Sewing machines in the Sewing machines M of 3 syringe types props up on the leading section position of arm 3 and is equipped with needlework press device 32, but the derivation supply of 3 needlework 31 (not illustrating among Fig. 1, with reference to Fig. 8, Fig. 9) that 3 pins of these needlework press device 32 subtends 11 are supplied with limits or lifts restrictions.As Fig. 8 and shown in Figure 9, this needlework press device 32 comprises: by screw member 34 needlework pressing plate erecting bed 35 on the panel 33 that Sewing machines props up arm 3 front ends is fixed in the one end; And this needlework pressing plate erecting bed 35 anterior opposed, be clipped in spring 37 between the head that is threaded into the screw member 36 that is fixed on the band head in the described panel 33 by the intermediate portion, be that fulcrum applies elastic force and makes its movable needlework pressing plate 38 towards 35 side oscillations of described needlework pressing plate erecting bed with the one end; The elastic force-applying that overcomes spring 37 makes this movable needlework pressing plate 38 drive the cylinder 39 of swing discretely from described needlework pressing plate erecting bed 35.
From the timing diagram of Figure 10 also as can be seen, the action of this needlework press device 32 is: when making usually, elongation action by cylinder 39, movable needlework pressing plate 38 drives swing towards the direction of separating with needlework pressing plate erecting bed 35 as shown in Figure 8, allow the derivation supply (lifting restrictions) of 3 needlework 31, in the trimming action beginning of the described cutting facility 18 after sewing finishing, contractive action along with cylinder 39, movable needlework pressing plate 38 utilizes the elastic force-applying of spring 37, as shown in Figure 9 towards 35 side oscillations of needlework pressing plate erecting bed, 3 needlework 31 are pushed remain between movable needlework pressing plate 38 and the needlework pressing plate erecting bed 35, make restriction to deriving to supply with, and, in the trimming release of cutting facility 18, utilize the elongation action of cylinder 39 once more, as shown in Figure 8 the restriction cancellation that the derivation of 3 needlework 31 is supplied with.
Below, to the Sewing machines M of the 3 syringe types with cutting facility 18 and needlework press device 32 of said structure make and the trimming effect describes.
From its free end side insert cartridge type pedestal part 1 by the tubular position of sewings, on one side by the cloth feeding direction a work feed of feed dog, for example cover making of seam etc. on one side towards regulation.In the sewing finishing of regulation, the movable cutting knife 15 of cutting facility 18, the hook-like hook line 15a of portion of its front end drives the turnover position shown in the solid line of the Fig. 5 swing to 3 needle falling holes 13 on the cross-section needle plate 5 and Fig. 6 toward row, then, return row from this turnover position and drive the position that is retracted into shown in the imaginary line that swings to Fig. 5 and Fig. 6.When it returns row driving swing, be hooked in the described hook-like hook line 15a of portion by 3 needlework 31 of needle falling hole 13 and by the looper thread (not shown) that looper 6 hooks end from above-below direction, and transfer to groove 14 1 sides that needle falling hole 13 and feed dog are used, utilize the effect of cutting off between movable cutting knife 15 and the fixed cutting tool 16 to cut off, and, cut thread end by resilient clamp between the trip end margin 17a of the fore-end of movable cutting knife 15 and clamp 17.
In the turnover position of above-mentioned movable cutting knife 15 and be retracted in the whole reciprocal driving hunting range between the position, this movable cutting knife 15 is held in channeling conduct between fixed cutting tool 16 and the clamp 17, swings smoothly and stably along certain horizontal plane under the state of no runout etc.
Among the present invention, because the knife edge 16a of the fixed cutting tool 16 of the swing channeling conduct of the movable cutting knife 15 of clamping and the trip end margin 17a of clamp 17, along the rear side of getting over towards cloth feeding direction a, the groove 14 distances incline direction of using with feed dog far away more, formed long skew lines shape, so that both (fixed cutting tool 16 and clamps 17) formed clamping pilot point is according to the reciprocal driving swing of movable cutting knife 15, between the fore-end that comprises this hook-like hook line 15a of portion and its base end part branch, move and change, therefore, even the cardinal extremity of fixed cutting tool 16 and clamp 17 part does not protrude from the side portion of needle plate 5, also can bring into play the clamping guiding function and the trimming effect thereof of movable cutting knife 15 reliably.Thus, these fixed cutting tools 16 and clamp 17 can be accommodated in the width with the dual-side 5a of the parallel formation of cloth feeding direction a, standard type needle plate 5 that 5a does not set up cutting facility, can be fixed in its back side.Like this, need be and use special erecting bed for the base end part of fixedly fixed cutting tool 16 and clamp 17, can reduce the part number and assemble man-hour, and, need on the part of cartridge type pedestal part 1, not form bellying fully to the side yet, realize the pathization and the miniaturization of cartridge type pedestal part 1 as much as possible, its result, even by the path tubular position of sewings, also can under the state that is not hooked, insert cartridge type pedestal part 1 easily and successfully and making of stipulating by this free end.
Again, owing to can make and be hooked by the hook-like hook line 15a of portion of movable cutting knife 15 and transfer 3 needlework 31 and the looper thread that come to the side, cut-out is on one side moved along the knife edge 16a of the length of fixed cutting tool 16 in one side, can make line cut off load under the situation of privileged site that load do not concentrate on knife edge 16a to disperse cutting off along knife edge 16a, therefore, the loss that can suppress knife edge 16a (promptly, blade is damaged) and be out of shape the sharpness that causes and reduce, even do not carry out the troublesome operations of frequent transposing fixed cutting tool 16 grades, also can guarantee the trimming function that sharpness is high for prolonged period of time all the time.
And, above-mentioned needlework press device 32 is set, the preceding end hook line 15a of portion of the movable cutting knife 15 of cutting facility 18 hooks 3 needlework 31 and looper thread, from the trimming that begins to transfer action zero hour to the effect of cutting off that utilizes movable cutting knife 15 and fixed cutting tool 16 each line cut off the trimming release that finishes constantly during, because restriction is made in the derivation supply to 3 needlework 31, so can stop the cut-out end of cut 3 needlework 31 that hooked by the hook line 15a of portion of movable cutting knife 15 and transfer to the side to be held in situation between the trip end margin 17a of the leading section of movable cutting knife 15 and clamp 17, can make these cut off the needlework end and below needle plate 5, become sagging state as free end, thus, when operation extracted from cartridge type pedestal part 1 in tubular position after the sewing finishing, the formed resistance of resilient clamp power is inoperative, the tubular position after the sewing finishing easily and successfully can be extracted from cartridge type pedestal part 1.
In addition, in the foregoing description, the structure of the Sewing machines M that is applicable to 3 syringe types has been made detailed description, but also be applicable to the Sewing machines of 2 syringe types.
In the foregoing description, except cutting facility 18, the structure of having equipped needlework press device 32 is described, but, also can obtains the effect that is had by cutting facility 18 in the occasion that this needlework press device 32 is not set again.
And, in the foregoing description, what illustrate is to make the zero hour of the needlework push action of being carried out by described needlework press device 32 consistent with the zero hour of the trimming action of cutting facility 18 execution, and, make the finish time of the needlework push action of carrying out by described needlework press device 32 consistent with the finish time of the trimming action of cutting facility 18 execution, but also can be shown in the dotted line of Figure 10, be in the zero hour of setting the needlework push action of carrying out by needlework press device 32 for than zero hour of the trimming action of carrying out by cutting facility 18 slightly earlier, and, be in the finish time that also can set the needlework push action of carrying out by needlework press device 32 for than finish time of the trimming action of carrying out by cutting facility 18 slightly a little later.
Claims (7)
1. the Sewing machines with cutting facility comprises: the cartridge type base; Be fixed in this cartridge type base free end, have with a plurality of needle falling holes of its cylinder axis direction quadrature and be disposed at and carry out the needle plate of the feed dog of work feed towards cylinder axis direction before and after this needle falling hole with groove; Be located in the cartridge type base of this needle plate bottom, with the direction of described cloth feeding direction quadrature on carry out oscillating traverse motion looper; Movable cutting knife, its leading section is bent to hook-shaped, in its bent front ends, has hook line portion week, described movable cutting knife back and forth drives swing in the oscillating traverse motion path of described looper and the horizontal plane between the described needle plate, thus make described before end hook line portion with the axle of the rear side of being located at described needle plate as the center and cross-section a plurality of needle falling hole; Fixed cutting tool, its utilize with movable cutting knife between cutting off effect and will this movable cutting knife return the row swing time the many needlework and the looper thread cut-out that be hooked in this hook line portion and transfer to described needle falling hole side; Clamp, it contacts with described movable cutting knife, and and fixed cutting tool between flexibly clamping guiding should movable cutting knife swing, can and movable cutting knife leading section between the thread end after the clamping cut-out flexibly, it is characterized in that,
The knife edge of described fixed cutting tool forms long skew lines shape along extending more away from feed dog towards the rear side of cloth feeding direction more with the incline direction of groove, so that and near the reciprocal driving swing of this movable cutting knife of the Elastic Contact point between movable cutting knife response and change moving between the part its preceding end hook line part and its cardinal extremity, simultaneously in its whole reciprocal driving hunting range, clamping guides movable cutting knife swing between fixed cutting tool and clamp
The trip end margin of described clamp is positioned on the roughly conplane position in the knife edge with described fixed cutting tool and forms long skew lines shape along described incline direction, thereby the clamping guiding should be swung by movable cutting knife between the whole reciprocal driving hunting range of described movable cutting knife and described fixed cutting tool
And these fixed cutting tools and clamp are at the back side of not being fixed in needle plate from a side of needle plate with dual-side parallel with cloth feeding direction under the state that foreign side protrudes.
2. the Sewing machines of band cutting facility as claimed in claim 1, it is characterized in that, on described fixed cutting tool and clamp, the installation board of integrally formed or almost parallel extension parallel from the knife edge of its skew lines shape and trip end margin towards the front side of cloth feeding direction with cloth feeding direction, install on the board at these, fixed cutting tool and clamp are fixed in the needle plate back side by screw member.
3. the Sewing machines of band cutting facility as claimed in claim 1 or 2, it is characterized in that, described movable cutting knife forms the bending with outer peripheral edges and inner peripheral, movable cutting knife return to greatest extent that row swings to and fixed cutting tool between cut off the line off-position time, described outer peripheral edges are protruded unlike the more outside side of a side of the needle plate with dual-side parallel with cloth feeding direction, when the past to greatest extent row of preceding end hook line portion of described movable cutting knife swung to the hook line position of cross-section a plurality of needle falling holes, described inner peripheral was positioned at the outside of feed dog with groove.
4. the Sewing machines of band cutting facility as claimed in claim 1 or 2, it is characterized in that, base end part at described movable cutting knife, pin is protruded, the chimeric leading section that in the cartridge type base, back and forth drives the drive link that moves with the expanding-contracting action interlock of cylinder on this pin along cloth feeding direction, this cylinder is installed on the sidepiece outside of the sewing machine base portion that links to each other with described cartridge type base base end side, leading section by described drive link and this pin chimeric makes described movable cutting knife back and forth drive swing freely along with the expanding-contracting action of cylinder.
5. the Sewing machines of band cutting facility as claimed in claim 3, it is characterized in that, base end part at described movable cutting knife, pin is protruded, the chimeric leading section that in the cartridge type base, back and forth drives the drive link that moves with the expanding-contracting action interlock of cylinder on this pin along cloth feeding direction, this cylinder is installed on the sidepiece outside of the sewing machine base portion that links to each other with described cartridge type base base end side, leading section by described drive link and this pin chimeric makes described movable cutting knife back and forth drive swing freely along with the expanding-contracting action of cylinder.
6. the Sewing machines of band cutting facility as claimed in claim 1 or 2, it is characterized in that, be provided with the needlework press device, the moment that begins to transfer many needlework and looper thread being hooked to each root line from the preceding end hook line portion of described movable cutting knife cut off by movable cutting knife and fixed cutting tool and till moment of finishing to cut off during, described needlework press device more is positioned at the needle falling hole than described needle plate on the position of line feed path upstream and carries out clamping and keep manying a needlework, pull out to limit it so that the needlework end after cutting off not by resilient clamp between movable cutting knife leading section and clamp.
7. the Sewing machines of band cutting facility as claimed in claim 6, it is characterized in that, the action timing setting of described needlework press device is become: the zero hour that the line cut-out that the zero hour of this needlework push action, ratio was undertaken by movable cutting knife and fixed cutting tool is moved slightly earlier, and the finish time that the line cut-out that the finish time of this needlework push action, ratio was undertaken by movable cutting knife and fixed cutting tool is moved slightly a little later.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2004295431A JP4645886B2 (en) | 2004-09-07 | 2004-09-07 | Sewing machine with thread trimmer |
| JP2004295431 | 2004-09-07 | ||
| JP2004-295431 | 2004-09-07 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1746371A CN1746371A (en) | 2006-03-15 |
| CN1746371B true CN1746371B (en) | 2011-07-27 |
Family
ID=36155480
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2005101037076A Expired - Fee Related CN1746371B (en) | 2004-09-07 | 2005-09-07 | Sewing machine with stitch breaking device |
Country Status (4)
| Country | Link |
|---|---|
| JP (1) | JP4645886B2 (en) |
| KR (1) | KR101090216B1 (en) |
| CN (1) | CN1746371B (en) |
| TW (1) | TW200632173A (en) |
Families Citing this family (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4337063B2 (en) * | 2007-02-08 | 2009-09-30 | ヤマトミシン製造株式会社 | Sewing machine with thread trimmer |
| KR200447773Y1 (en) * | 2007-07-10 | 2010-02-17 | 치 시앙 인더스트리얼 캄퍼니 리미티드 | Automatic yarn cutting device of sewing machine |
| JP5557126B2 (en) * | 2007-10-17 | 2014-07-23 | ヤマトミシン製造株式会社 | Sewing machine thread trimmer |
| JP5777035B2 (en) * | 2013-08-08 | 2015-09-09 | ヤマトミシン製造株式会社 | Thread trimming device and thread trimming method for double chain stitch sewing machine |
| JP5850439B2 (en) * | 2013-09-20 | 2016-02-03 | ヤマトミシン製造株式会社 | Double chain stitch method and double chain stitch machine |
| CN107916507B (en) * | 2016-10-08 | 2023-10-31 | 杰克科技股份有限公司 | Thread cutting device of sewing machine |
| CN106436072B (en) * | 2016-11-29 | 2023-07-11 | 浙江中捷缝纫科技有限公司 | Thread cutting mechanism of sewing machine |
| CN110670256A (en) * | 2018-07-02 | 2020-01-10 | 天津宝盈电脑机械有限公司 | Multi-needle chain type transverse sewing machine head |
| CN109797492B (en) * | 2019-02-27 | 2021-04-20 | 杰克缝纫机股份有限公司 | Control method for eliminating stitches on fabric |
| CN112226928B (en) * | 2020-11-11 | 2022-08-16 | 东莞市钰腾机械科技有限公司 | Sew with long stitches cutting device |
| KR102296620B1 (en) | 2021-03-10 | 2021-09-02 | 주식회사 피앤비무역 | Sewing machine and seam method to form a double knot to prevent loosening of seams |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4834010A (en) * | 1987-03-03 | 1989-05-30 | Pegasus Sewing Machine Mfg. Co., Ltd. | Reciprocating thread cutter for multi-needle looper thread type sewing machine |
| CN1120418A (en) * | 1994-07-29 | 1996-04-17 | 东海工业缝纫机株式会社 | Thread cutting device in sewing machine |
| CN1123855A (en) * | 1994-12-01 | 1996-06-05 | 十木株式会社 | Needle and thread cutting device for sewing machine |
| CN1150190A (en) * | 1995-09-13 | 1997-05-21 | 东海工业缝纫机株式会社 | Thread cutting device in sewing machine |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0179477U (en) * | 1987-11-13 | 1989-05-29 | ||
| JP2747765B2 (en) * | 1991-10-24 | 1998-05-06 | ヤマトミシン製造株式会社 | Sewing machine thread trimming method and apparatus |
-
2004
- 2004-09-07 JP JP2004295431A patent/JP4645886B2/en not_active Expired - Fee Related
-
2005
- 2005-08-31 TW TW094129826A patent/TW200632173A/en unknown
- 2005-09-06 KR KR1020050082559A patent/KR101090216B1/en active IP Right Grant
- 2005-09-07 CN CN2005101037076A patent/CN1746371B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4834010A (en) * | 1987-03-03 | 1989-05-30 | Pegasus Sewing Machine Mfg. Co., Ltd. | Reciprocating thread cutter for multi-needle looper thread type sewing machine |
| CN1120418A (en) * | 1994-07-29 | 1996-04-17 | 东海工业缝纫机株式会社 | Thread cutting device in sewing machine |
| CN1123855A (en) * | 1994-12-01 | 1996-06-05 | 十木株式会社 | Needle and thread cutting device for sewing machine |
| CN1150190A (en) * | 1995-09-13 | 1997-05-21 | 东海工业缝纫机株式会社 | Thread cutting device in sewing machine |
Non-Patent Citations (1)
| Title |
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| JP平1-79477U 1989.05.29 |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2006075552A (en) | 2006-03-23 |
| TWI340189B (en) | 2011-04-11 |
| JP4645886B2 (en) | 2011-03-09 |
| KR101090216B1 (en) | 2011-12-06 |
| TW200632173A (en) | 2006-09-16 |
| KR20060051038A (en) | 2006-05-19 |
| CN1746371A (en) | 2006-03-15 |
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