CN100567611C

CN100567611C - Sewing machines with cut-off knife

Info

Publication number: CN100567611C
Application number: CNB031101844A
Authority: CN
Inventors: 三辻登四郎
Original assignee: Yamato Sewing Machine Mfg Co Ltd
Current assignee: Yamato Sewing Machine Mfg Co Ltd
Priority date: 2002-04-15
Filing date: 2003-04-15
Publication date: 2009-12-09
Anticipated expiration: 2023-04-15
Also published as: TWM301231U; TW200417645A; JP4158083B2; CN1451801A; JP2003305287A

Abstract

A kind of Sewing machines with cut-off knife, support the cut-off knife axle of movable cut-off knife, and the cut-off knife platform that will install and fix cut-off knife is via the support tube that is based in a side, can be supported on the bracing frame of base station towards the axial length direction with rolling over, rear side at cut-off knife platform and bracing frame, cooperate the lead screw shaft that is screwed together in the screw that is located at the sewing support, be sticked in the slot that is located at around the support tube with being located at this lead screw shaft operation dial, to constitute adjusting device, and make a spiral shell do spiral shell to advance by the operation dial, can be simply and correctly regulate the position of cut-off knife platform left and right directions, can be flexibly corresponding to the change of the off-position of tailoring cloth.

Description

Sewing machines with cut-off knife

Technical field

The present invention is relevant for the Sewing machines with cut-off knife (Knife) (Sewing Machine), it comprises movable cut-off knife, for across institute's Fixed width degree, and under the state that turns back in the back side, be breaking at the cloth edge that the needle downing position of sewing on the support is admitted to, and in the inside turnover from the sewing support of a side of needle downing position front portion; And fixing cut-off knife, be slidably connected to a side of this movable cut-off knife.

Background technology

For example, in the making of T-shirt, be located at cylindrical portion around the waist or the occasion of cuff in, will be as the cloth edge of object, across institute's Fixed width degree, and the state that turns back overleaf under, send into the position of pin, meet crease on the cloth of face side with the edge of implementing to turn back.

Owing to implement this crease, in the technology in the past, the Sewing machines of used tool cut-off knife be with by do from the transmission of machine spindle up and down moving after, at the enterprising movable cut-off knife that goes out of sewing support, and the fixedly cut-off knife that is slidably connected to this movable cut-off knife is disposed at a side of needle downing position front portion.Movable cut-off knife and fixedly cut-off knife have turn back overleaf after, will send into the edge of the tailoring cloth of needle downing position, the effect of the fixed outer rest parts cut-out of width.

Fig. 1 does the key diagram of the enforcement state of crease for using this Sewing machines (three pins) with cut-off knife.The needle downing position of three pins arranged side by side about center line among the figure is represented.Movable cut-off knife 42 is installed on the cut-off knife axle (not icon) that crossbearer supports on the inside left and right directions of sewing support, makes the reciprocal rotation of the axle running of this cut-off knife axle corresponding to the transmission of machine spindle, and the direction of arrow is as shown in FIG. done and shaken.And fixedly cut-off knife 43 as shown in the figure, is slidably connected to a side of movable cut-off knife 42 and fixed support on the cut-off knife platform of the double supporting member of doing this cut-off knife axle.

Movable cut-off knife 42 has the leading section of hook-shaped bending.This leading section goes out by the sewing support before needle downing position of fluctuating of movable cut-off knife 42 is enterprising.Send into the edge E that the back side of the cloth W of needle downing position turns back by catching by the leading section of the movable cut-off knife 42 that moves up, afterwards move down and drop-down by movable cut-off knife 42, with the blade 42a of this movable cut-off knife 42 and be slidably connected between the blade 43a of fixedly cut-off knife 43 of a side and cut off.

This cut-out is by for the movable cut-off knife 42 of needle downing position and the fixing position relation of the slide connecting part left and right directions of cut-off knife 43, and the width D of turning back of remaining regulation is implemented.It is roughly to keep certain to turn back width D and become desirable state that needle downing position that should be after cut-out is done crease, and again, the homework burden of being implemented by the manually-operated of going ahead of the rest during cloth W sends into of turning back is alleviated.Therefore, can high efficiency implement high-quality crease.

Therefore, be set at, generally speaking shown in Fig. 2 A, on the needle downing position represented, in the width D of turning back, form by the line that each pin of falling stitched by center line as the width D of turning back in the above crease.Along with the variation of sewings, shown in Fig. 2 B, have outermost needle downing position and be set in the situation of implementing crease outside the width D of turning back.The purpose of this crease is for example to give pattern characteristics with suture.Again, in the making of soft cloth material, its purpose is for preventing the edge warpage.

Corresponding to the crease of these all width D of turning back, be necessary the movable cut-off knife 42 and the fixing off-position of cut-off knife 43 are done the left and right directions change corresponding to needle downing position.In the past, with the cut-off knife platform of the double fixedly cut-off knife 43 of doing movable cut-off knife 42 supporting members fixedly do releasing, the position, the left and right sides of this cut-off knife platform is done fixing more after changing by manual plus-minus.But in this method, be difficult to determine correct position, behind the examination seam, must carry out the location change operation once again, have the problem that the desirable width D of turning back needs many manpowers that obtains.

Summary of the invention

Because above-mentioned problem, purpose of the present invention is for providing a kind of Sewing machines with cut-off knife, before the needle downing position at the edge of the tailoring cloth that need cut off, is provided with movable cut-off knife and fixing cut-off knife, and the position of its left and right directions can reach simply correctly and change.For example, corresponding to the turn back speed of crease of width of change.

The Sewing machines with cut-off knife of first invention of the present invention, it comprises the cut-off knife axle, is supported by crossbearer on the inside left and right directions of sewing support, by the transmission from machine spindle, carries out back and forth rotating around axle; Movable cut-off knife is installed on this cut-off knife axle, does swinging up and down corresponding to this back and forth rotates; The cut-off knife platform has the support tube that supports above-mentioned cut-off knife axle integratedly, and can move with the axial length direction of this support tube to above-mentioned cut-off knife axle; Fixedly cut-off knife is installed on this cut-off knife platform, is slidably connected to a side of above-mentioned movable cut-off knife, cuts off the edge of the cloth of sending on this sewing support; And, adjusting device, for change according to should be fixedly the off-position at cut-off knife and the above-mentioned edge of this movable cut-off knife, to above-mentioned support tube apply pushing force and with the said fixing cut-off knife and movably cut-off knife adjust the shift position of above-mentioned cut-off knife platform.

In the present invention, support movable cut-off knife the cut-off knife axle support tube be equipped with fixedly that the cut-off knife platform of cut-off knife is provided with integratedly, the operating personnel applies pushing force by the operation of adjusting device to support tube, make the cut-off knife platform in the axial length direction of cut-off knife axle, be that right and left moves up, reach the fixedly position, the left and right sides of cut-off knife and adjust movable cut-off knife, and the off-position of change cloth.This change can simple and easy and correctly be implemented, for example can be corresponding to the crease of all width that turns back.

Again, the Sewing machines with cut-off knife of second invention of the present invention, wherein the adjusting device of first invention has and is screwed together in the screw that is located at above-mentioned sewing support, and by the rotary manipulation lead screw shaft that spiral shell advances on left and right directions, and be located on the part of this lead screw shaft, and be sticked in the holding section of the groove of the periphery that is arranged on above-mentioned support tube.

In the present invention, have the lead screw shaft of the holding section that engages with the groove of the periphery that is arranged on support tube, can be screwed together in to be located at and constitute adjusting device as the screw of standing part sewing support.The operating personnel is by doing rotary manipulation to this lead screw shaft and doing spiral shell and advance on left and right directions, via the groove that is sticked in above-mentioned holding section support tube is applied pushing force, the cut-off knife platform that possesses this support tube is integratedly moved up at right and left and change the off-position of cloth.

Again, the Sewing machines with cut-off knife of the 3rd invention of the present invention, wherein the holding section of second invention applies rotary manipulation power to above-mentioned lead screw shaft, and doublely does the chimeric operation dial that is fixed in this lead screw shaft.

In this invention, this lead screw shaft is chimeric be fixed in this lead screw shaft the operation dial around, for example, make it be sticked in the slot that is located at cut-off knife platform outside, and constitute the holding section of closing simply with the cut-off knife decometer.

Again, the Sewing machines with cut-off knife of the 4th invention of the present invention, it more comprises fixture, fixes above-mentioned cut-off knife platform by the suitable shift position that above-mentioned adjusting device is regulated.

In the present invention, the shift position of adjusted cut-off knife platform is fixed by fixture by the operation of adjusting device, and movable cut-off knife reaches fixedly cut-out action stable carrying out under fixing state of cut-off knife.

Purpose of the present invention and new feature are read the additional drawing of following detailed description and reference, just can be clear fully.

The simple declaration of accompanying drawing

Fig. 1 represents to use the Sewing machines with cut-off knife to do the key diagram of the enforcement state of crease.

Fig. 2 A, 2B are the key diagrams of the width that turns back of crease.

Fig. 3 is the stereogram of all structures of the Sewing machines of the present invention with cut-off knife.

Fig. 4 is the stereogram of structure that is provided with the cut-off knife mechanism of the Sewing machines with cut-off knife of the present invention.

Fig. 5 is the three-dimensional exploded view of structure that is provided with the cut-off knife mechanism of the Sewing machines with cut-off knife of the present invention.

Near the component part of Fig. 6 adjusting device plane.

Concrete embodiment

Following according to representing that the graphic of better embodiment is described in detail the present invention.Fig. 3 is the stereogram of all structures of the Sewing machines of the present invention with cut-off knife.

The Sewing machines of icon is the Sewing machines with inclined to one side flush joint of the sewing machine arm A of support base by the top C of foot that is built in sewing support B.Hang down and many pins 1,1 are installed to the lower end of the needle bar of sewing machine arm A leading section ..., hanging down equally is equipped with presser feet (Presser Foot) 2 to the lower end of the pressure bar of sewing machine arm A leading section.Regard to pin 1,1 again ... the leading section of sewing machine B of below on, set up needle plate (Stitch Plate) 3, have not sinker burr of icon (Looper) and feed mechanism (FeedMechanism) in the bottom of this needle plate 3.

Above-mentioned pin 1,1 ... be by from being built in the not transmission of going up axle of icon of sewing machine arm, common with above-mentioned needle bar, comprise above-mentioned needle plate 3 up and down do in the fixed stroke and move up and down.Again, presser feet 2 pass through fixed operation can on needle plate 3, descend, and this needle plate 3 between clamping is sent to from the place ahead on the sewing support B cloth.

As the Sewing machines of above structure, as shown in Figure 3, on the leading section front side of sewing support B, has cut-off knife mechanism 4.And the lid that marked by figure not of this cut-off knife mechanism 4 is covered and is constituted the inside of sewing support B.Fig. 4 represents the stereogram with the cut-off knife mechanism 4 of needle plate 3.Fig. 5 is the exploded perspective view of cut-off knife mechanism 4.

3 for to be erected at as the needle plate above the leading section of above-mentioned Sewing machines seat B among the figure.The

needle falling hole

30,30 that has a plurality of (shown in the figure being three) to form side by side on the summary central portion of this needle plate 3 at width ..., for the above-mentioned many pins 1,1 that move up and down ... insert logical during decline.At these

needle falling holes

30,30 ... front and back and both sides on form the outstanding rectangle of feed tooth and send

hole

31,31 ...

On needle plate 3, as the arrow indication, send into cloth among the figure from a side direction opposite side of long direction.This cloth (icon omission) is held on above-mentioned needle plate 3 and drops between this presser feet 2 (with reference to Fig. 3) on its top.Send

hole

31,31 by process ... protrude in the not action of sending tooth of icon on the needle plate 3, do sending into intermittently on the fixed stroke, by descending in this

needle falling hole

30,30 ... pin 1,1 ..., and be disposed at deserve the position not the action of the sinker burr that marks of figure do and make.

Cut-off knife mechanism 4 has between this needle plate 3 and is fixedly arranged on the base station 40 of the leading section inboard of sewing support B, be set up in the cut-off knife axle 41 of this base station 40, be installed on the movable cut-off knife 42 on this cut-off knife axle 41, and the fixedly cut-off knife 43 that is slidably connected to this movable cut-off knife 42 from a side (right side of figure).This movable cut-off knife 42 is to move by the transmission of machine spindle (not icon), and being slidably connected to fixedly, cut-off knife 43 backs cut off the edge of sending into the cloth on the needle plate 3.

Above-mentioned base station 40 is connected and fixed by many dogbolts.Above-mentioned cut-off knife axle 41 is by the pair of supporting 40a that is located on the

base station

40,40a separates two places in the axial length direction and supports, axle rotates to freely to rotate, and with front position crosscut on left and right directions of needle plate 3, promptly sends into direction with cloth W and slightly becomes the direction crosscut of orthogonal to set up.

Above-mentioned movable cut-off knife 42 has the blade 42a of hook-shaped bending in its leading section.The bottom embedding of this movable cut-off knife 42 and is fixed in this cut-off knife axle 41 1 ends, and this cut-off knife axle 41 protrudes in base station 40 left side of bracing frame 40a on one side.Gu Ding movable cut-off knife 42 is the reciprocal rotations corresponding to cut-off knife axle 41 described later thus, and this blade 42a fluctuates.In the front portion of this needle plate 3, the left side cut out proper width and form the notch part 32 of rectangle.The blade 42a of movable up and down cut-off knife 42 front ends when it is up moving, as shown in Figure 4, protrudes on the needle plate 3 through this notch part 32 as described above.

Again, said fixing cut-off knife 43, as shown in Figure 5, it is the tabular component that forms blade 43a in the edge of length direction one side, and be adjacent to the installation site of movable cut-off knife 42 and be installed on the cut-off knife platform 44 that supports by base station 40, as shown in Figure 4, on the vertical edge of above-mentioned notch part 32 along above-mentioned blade 43a.The blade 43a of the fixedly cut-off knife 43 of An Zhuaning breaks away from one to connect (Slide Contact) blade in the movable cut-off knife 42 that moves up and down thus, in this slide connecting part as shown in Figure 1, cuts off the edge E of cloth W, implements aforesaid crease.

The in addition end nipple of above-mentioned cut-off knife axle 41 is for the right side of the bracing frame 40a of base station 40 another sides, and on this protuberance, as shown in Figure 4, spring T-Ring 45 is that coaxial embedding fixing with limit collar 47.Between this spring T-Ring 45 and the limit collar 47 coil spring 46 is housed, cut-off knife axle 41 is by the elastic force tension application of force to the right of this coil spring 46.The movable cut-off knife 42 of front that is installed on cut-off knife axle 41 thus moves up and down this blade 41 being pressed on from the left side under the state of the fixing blade 43a of cut-off knife 43, is beneficial to and implements aforesaid cut-out.

This limit collar 47 is connected to the end face of the bracing frame 40a of homonymy, and for example, thick cloth W is held on movable cut-off knife 42 and fixedly between the cut-off knife 43 time, resists the elastic force of this coil spring 46 and produces the restriction that cut-off knife axle 41 is moved to the left.And the fixed position of spring T-Ring 45 and limit collar 47 can adjust in the axial length direction of cut-off knife axle 41.Increase and decrease the elastic force of coil spring 46 by this adjustment, fixedly the blade 42a of cut-off knife 42 and fixedly the intensity of pressing of the blade 43a of cut-off knife 43 can do suitable adjustment.

On cut-off knife axle 41, above-mentioned bracing frame 40a, between the support portion of 40a, the coaxial bottom that is embedded with drive link 6.On the leading section of drive link 6, as shown in Figure 5, form length direction along the slotted hole of establishing 60.Drive link 6 as shown in Figure 4, is the connecting elements 7 by the middle part that is linked to above-mentioned slotted hole 60 through set bolt 61, is linked to the turning cylinder that figure not marks.This turning cylinder is to be linked to the machine spindle (figure does not mark) that is set up in the sewing support B via the eccentric stiffener (Eccentric Mechanism) of generally acknowledging, corresponding to the rotation of machine spindle, implement that axle rotates decide the reciprocal rotation of angle.

By above structure, the rotation of above-mentioned machine spindle is passed to drive link 6 via above-mentioned turning cylinder and connecting elements 7, and this drive link 6 can shake.This shakes and is passed to the cut-off knife axle 41 that is embedded with drive link 6 bottoms.The movable cut-off knife 42 that is installed on the front end of this cut-off knife axle 41 can shake.The shaking quantity of the movable cut-off knife 42 that is produced thus is located in the length range of the slotted hole 60 of drive link 6, can freely adjust by the fixed position that changes said fixing bolt 61.

On the one hand, the fixedly cut-off knife platform 44 of cut-off knife 43 is installed, as shown in Figure 5, has the support tube 44a of the former tubular that is based in a side, this support tube 44a is through the bracing frame 40a of the homonymy of above-mentioned base station 40, and clasps by the connection of connecting bolt 48 and to fix.Above-mentioned cut-off knife axle 41 runs through and is supported in this support tube 44a, and rotates in this support tube 44a.

The leading section of above-mentioned support tube 44a be from the opposite side suitable length of bracing frame 40a give prominence to, at the rear side of this protuberance, be provided with adjusting device 5 for the left and right directions position of adjusting cut-off knife platform 44.Fig. 6 is near the some fractures plane of the component part of adjusting device 5.

Adjusting device 5 as shown in this figure comprises the slot 50 of little width, be formed at above-mentioned support tube 44a the protuberance rear side around slightly become the direction of orthogonal on the face with the axle center, lead screw shaft 51, slightly become parallel setting up with this cut-off knife axle 41 in opposite directions with this slot 50, and circular plate type operation dial 52, be embedded at the distolateral of this lead screw shaft 51 coaxially, and will around an one of face be sticked in slot 50.

Above-mentioned lead screw shaft 51, one one screw 53 being located at the above-mentioned base station 40 of sewing support B inside crosses suitable length and screws togather, and the rotary manipulation by this operation dial 52 makes an axle rotation, does spiral shell along above-mentioned screw 53 on left and right directions and advances.Advance corresponding to this spiral shell, this operation dial 52 also can be done the displacement of left and right directions, and signature is pressed in the side that is located at the slot 50 of face around the protuberance of above-mentioned support tube 44a.

As the bracing frame 40a of above-mentioned support tube 44a through base station 40, connect by connecting bolt 48 and to fix, can move in the axial length direction after removing this connection.

Then, unclamp above-mentioned connecting bolt 48 to remove the fixing of support tube 44a, become the aforesaid operations dial 52 of adjusting device 5 operating sides at this state rotary manipulation and make under the state that lead screw shaft 51 spiral shells advance, this support tube 44a and cut-off knife platform 44 are by the effect of the pushing force of operation dial 52 by putting on slot 50, move up at right and left, the movable cut-off knife 42 that is installed on the fixedly cut-off knife 43 of this cut-off knife platform 44 and is slidably connected to this also can move up at right and left, the slide connecting part of two cut-off

knives

42,43, the off-position of variable cloth as previously mentioned.Among Fig. 6, the state that moves to the right side represents that with solid line the device that moves to the left side is represented with center line.

Has the lead screw shaft 51 that comprises with operation dial 52 one as above adjusting device 5, can form the slot 50 that operation dial 52 is sticked in one one the support tube 44a that becomes cut-off knife platform 44, and screw togather above-mentioned lead screw shaft 51 and be formed at the simple structure of the screw 53 that deserves the position of Sewing machines B, rotary manipulation by aforesaid operations dial 52, the off-position of the cloth on the needle plate 3 can easily and correctly be regulated, shown in the 2nd figure, can be freely corresponding to the crease of the different width D of turning back.

And in above embodiment, for the holding section that set operation dial 52 dual-purposes of rotary manipulation of lead screw shaft 51 are done cut-off knife platform 44, this holding section is made as different objects with operation dial 52 and also can.

Again, have the connecting bolt 48 that connects support tube 44a, fix by the connection of connecting bolt 48 as the shift position of the above-mentioned cut-off knife platform of regulating 44.Then movable cut-off knife 42 reaches fixedly, and cut-off knife can stably carry out the cut-out of cloth.

And in the above embodiment, from being located at the notch part 32 in needle plate 3 left sides, make movable cut-off knife 42 turnover, as shown in Figure 1, do explanation though cut off the state of the edge E that turns back at the back side at cloth W, the notch part that makes 42 turnover of movable cut-off knife is located at the right side of needle plate 3, cuts off cloth on the right side of needle downing position, the Sewing machines with cut-off knife with this structure is also applicable to the present invention.Again, in the above embodiment, though do explanation at the suitable example of the Sewing machines of inclined to one side flush joint, the present invention also is applicable to the Sewing machines beyond the inclined to one side flush joint.

The Sewing machines with cut-off knife of the present invention's first invention as described in detail above, the cut-off knife platform of cut-off knife is provided with integratedly with being equipped with fixedly to make the support tube of the cut-off knife axle that supports movable cut-off knife, the operating personnel applies pushing force by the operation of adjusting device to support tube, make the cut-off knife platform in the axial length direction of cut-off knife axle, be that right and left moves up, reach the fixedly position, the left and right sides of cut-off knife and adjust movable cut-off knife, and the off-position of change cloth.This change can be simple and easy and be correctly implemented, for example can be apace corresponding to the turn back crease of width of change.

Again, for the holding section on the part that is screwed together in the lead screw shaft that is located at sewing support screw is sticked in the groove of the periphery that is arranged on above-mentioned support tube, and utilize the spiral shell of above-mentioned lead screw shaft and then the structure of removable cut-off knife platform in the Sewing machines with cut-off knife of the present invention second invention.

The Sewing machines with cut-off knife of the present invention's the 3rd invention because the operation dial that supplies lead screw shaft to do rotary manipulation is also used as the holding section of cut-off knife platform, can constitute the adjusting device that changes the cloth off-position by the mobile adjusting of cut-off knife platform simply.

Again, the Sewing machines with cut-off knife of the present invention's the 4th invention, because of having the fixture of shift position that fixedly is moved the cut-off knife platform of adjusting by adjusting device, the cut-out at cloth edge can stably be implemented in shift position after adjusting, and high-quality sewings etc. can be provided, the present invention reaches good effect.

More than, be intended to show up hill and dale technology contents of the present invention at the embodiment described in the detailed description of the present invention hurdle, but the present invention is not limited to the narrow definition of these specific embodiments, in the scope described in spirit of the present invention and the claim scope, can implement all changes.

Claims

1. Sewing machines with cut-off knife comprises:

The cut-off knife axle is supported by crossbearer on the inside left and right directions of sewing support, by the transmission from machine spindle, carries out back and forth rotating around axle;

Movable cut-off knife is installed on this cut-off knife axle, does swinging up and down corresponding to this back and forth rotates;

The cut-off knife platform has the support tube that supports above-mentioned cut-off knife axle integratedly, and can move with the axial length direction of this support tube to above-mentioned cut-off knife axle;

Fixedly cut-off knife is installed on this cut-off knife platform, is slidably connected to a side of above-mentioned movable cut-off knife, cuts off the edge of sending into the cloth on this sewing support; And,

Adjusting device, for change according to should be fixedly the off-position at cut-off knife and the above-mentioned edge of this movable cut-off knife, to above-mentioned support tube apply pushing force and with the said fixing cut-off knife and movably cut-off knife adjust the shift position of above-mentioned cut-off knife platform.

2. the Sewing machines with cut-off knife as claimed in claim 1, wherein above-mentioned adjusting device comprises:

Lead screw shaft is screwed together in the screw that is located at above-mentioned sewing support, and advances by rotary manipulation spiral shell on left and right directions; And

The holding section is located on the part of this lead screw shaft, and is sticked in the groove, and this groove is arranged at the periphery of above-mentioned support tube.

3. the Sewing machines with cut-off knife as claimed in claim 2, wherein above-mentioned holding section is double does the chimeric operation dial that is fixed in this lead screw shaft, in order to above-mentioned lead screw shaft is applied rotary manipulation power.

4. as claim 1,2 and 3 any described Sewing machiness with cut-off knife, it also comprises fixture, fixes above-mentioned cut-off knife platform on the suitable shift position of regulating by above-mentioned adjusting device.