CN101275344B

CN101275344B - Cloth feeding device of sewing machine

Info

Publication number: CN101275344B
Application number: CN2008100877747A
Authority: CN
Inventors: 坂本真一; 小田洋
Original assignee: Juki Corp
Current assignee: Juki Corp
Priority date: 2007-03-27
Filing date: 2008-03-26
Publication date: 2013-01-02
Anticipated expiration: 2028-03-26
Also published as: KR101426814B1; KR20080087728A; JP5142567B2; TWI417435B; TW200902787A; CN101275344A; JP2008237555A

Abstract

The invention provides a cloth feeding device of a sewing machine, which avoids a locking state of the sewing machine, and enables a slide block to move from one guide part to another guide part. A gap forms between a left end of a first guide part (33) and a right end of a second guide part (34). Each guide part (33, 34) is provided with a protruding part (33a, 34a) at each front end opposite to each other which are located at outer side in the diameter direction of an arc in each guide part, protruding to the guide part on another side respectively. Each front end of the protruding part has curved surface shaped in projecting form towards the guide part on another side, so as to connect outer border from each guide part to the diameter direction of the protruding part, and make a chamfer angle of side angle part in diameter direction of the ends opposite to each other of each guide part curved surface, and connect inner side border in the diameter direction of the protruding part and the inner side angle part in the diameter direction of the opposite end of each guide part with the curved surface part.

Description

The cloth feed apparatus of Sewing machines

Technical field

The present invention relates to a kind of cloth feed apparatus of Sewing machines, it keeps sewn object and forwards, backwards left and right sides feeding.

Background technology

Current, in for example with the button sewing machine of button staple on cloth, the cloth feed apparatus of known a kind of Sewing machines is on one side it keeps the sewn objects such as button and cloth, one side corresponding forwards, backwards move left and right with buttonhole (for example, with reference to patent documentation 1).This cloth feed apparatus as the movable body that the button support that keeps button is set at leading section, is supported for cardinal extremity can move up in front and back simultaneously in the left and right directions rotation.And, utilize the aforementioned movement of movable body, make the button that remains in the button support mobile all around, alternately pass buttonhole by making suture needle, form the stitching of U word shape roughly or X word shape, thereby with the button staple on cloth.

Above-mentioned cloth feed apparatus in patent documentation 1 in the circulating sewing machine of record has: left and right sides feed cam, and it is used for movable body is applied the rotational motion of left and right directions; And the front and back feed cam, it seesaws for movable body is applied.When these cams are fixed a number at Sewing machines driving shaft rotary compasses, carry out 1 rotation.

In addition, the front and back action of movable body is diversified owing to follow the variation of stitching kind, and therefore, the front and back feed cam is provided with multiple.And, according to the desired kind of making, contact component is contacted with the cam part of the cam of selecting from this a plurality of front and back feed cam, according to the displacement of this cam part, the driving movable body that makes Sewing machines is forwards, backwards or move left and right.

The selection switching mechanism of the front and back cloth feed cam that patent documentation 1 is put down in writing as shown in figure 11, is provided with the handover operation bar 103 that rotates at movable body 101 centered by turning cylinder 102, be provided with slide block 104 at this handover operation bar 103.On the other hand, in front and back feed cam 105, insert the contact (roller) 107 that is arranged on a plurality of swing wrists 106 ends, on each swing arm 106, all be provided with circular-arc guide part 106A, the track of the slide block 104 that it produces along being swung by handover operation bar 103.

And, during user stopping after finishing to make, in the some situations about engaging in the guide part 106A of slide block 104 and a plurality of swing wrists 106, movable body 101 is moved forward and backward along the front and back feed cam groove corresponding with the guide part of this engaging.In addition, make movable body 101 in the situation that other front and back feed cam 105 moves forward and backward in hope, if with the disconnected handover operation bar 103 of manual operation, then can make slide block 104 from being configured to a same circular-arc guide part 106A and moving to other guide parts 106A and engaging.

Patent documentation 1: Unexamined Patent 10-99571 communique

Summary of the invention

In the cloth feed apparatus of above-mentioned existing Sewing machines, movable body has hook, and this hook has the rake that side more forwards more descends, and becomes the structure that cloth feed apparatus integral body is forwards applied power by hanging via this hook.Its result, when slide block was between a guide part and another guide part, slide block was applied power to the Sewing machines front side, had the problem that is difficult to slide block is successfully moved to from a guide part another guide part.

In addition, at the state that is disposed at slide block between each circular-arc guide part, step on sewing machine pedal and make Sewing machines when starting, each circular-arc guide part clamping that slide block may be begun respectively to swing and make the Sewing machines locking, existence is from the state of operation handover operation bar of this locking, is difficult to make slide block return some circular-arc guide parts and the problem that engages.

The object of the present invention is to provide a kind of cloth feed apparatus, it can make slide block successfully move to another guide part from a guide part when preventing the lockup state of Sewing machines.

In order to address the above problem, technical scheme 1 related invention has: movable body (18), and it arranges cloth support (16) at front end, can left-right rotation and can move forward and backward; Cloth presser foot (307), it can be rotationally on above-below direction links with aforementioned movable body, is held between itself and the aforementioned cloth support by lower general who has surrendered's cloth clamp; First and second cam body (4,6,36), they form respectively cam part (3,5) at outer peripheral face; Switch wrist (21), itself and aforementioned movable body link, and swing in the horizontal direction; First and second swings wrist (31a, 32a), they respectively axle be supported on first and second spindle unit (11,35) that uprightly is arranged on the frame, swing along the cam part of aforementioned first and second cam body respectively; First and second pendular body (31,32), they and aforementioned first and second swing the swing interlock of wrist, swing in the horizontal direction centered by aforementioned first and second spindle unit respectively; First and second circular-arc guide part (33,34), they are arranged on aforementioned first and second pendular body, form circular-arc centered by the oscillation center of aforementioned switching wrist, and the mode of facing mutually each other with front end disposes relatively; And slide block (22), it is arranged on the aforementioned switching wrist, can optionally engage with two circular-arc guide parts, circular-arc guide part along with the swing of aforementioned switching wrist along engaging slides, by the swing that utilizes aforementioned first or the second guide part that aforementioned slide block optionally engages aforementioned movable body is moved, make the cloth that is held between aforementioned cloth support and the aforementioned cloth presser foot about or at least one direction in the front and back mobile, it is characterized in that, aforementioned first and second circular-arc guide part, on end separately respect to one another, has respectively protuberance (33a, 34a), this protuberance is positioned at the radial direction outside of each circular-arc guide part, and towards the guide part of opposite side and give prominence to, from aforementioned first and second circular-arc guide part to aforementioned protuberance, edge, the radial direction outside links to each other with same side face.

The invention that technical scheme 2 is related is characterized in that: in technical scheme 1 described invention, and aforementioned protuberance, its front end becomes curve form.

The invention that technical scheme 3 is related is characterized in that: in technical scheme 1 or technical scheme 2 described inventions, and aforementioned first and second circular-arc guide part, the inboard bight of the radial direction of end respect to one another is with curved surface shape chamfering.

The invention that technical scheme 4 is related, it is characterized in that: in technical scheme 3 described inventions, aforementioned first and second circular-arc guide part, from the inboard edge of the radial direction of aforementioned each protuberance, extremely the inboard bight of the radial direction of the opposed end of aforementioned each circular-arc guide part is continuous with the curved surface of concavity.

The invention that technical scheme 5 is related is characterized in that: in technical scheme 1 or technical scheme 2 described inventions, and aforementioned first and second circular-arc guide part, near the edge, the outside front end separately respect to one another has recess.

The effect of invention

The invention related according to technical scheme 1 is positioned at the radial direction outside of each circular-arc guide part by making protuberance, can prevent that limited slip block moves to the front side of Sewing machines, and the movement of slide block between first and second circular-arc guide part carried out smoothly.In addition, owing to link to each other with identical periphery from the edge, the radial direction outside of first and second circular-arc guide part protuberance extremely separately, therefore can make slide block successfully move to the second circular-arc guide part from the first circular-arc guide part, or successfully reverse movement.

The invention related according to technical scheme 2, except can obtaining the effect identical with technical scheme 1 described invention, especially, because front end has the edge of curve form, therefore even for example near slide block and each protuberance aforementioned in the situation of butt, slide block is more successfully led between first and second circular-arc guide part and move.

The invention related according to technical scheme 3, except can obtaining the effect identical with technical scheme 1 or technical scheme 2 described inventions, especially, because first and second circular-arc guide part, the inboard bight of the radial direction of end respect to one another is with curved surface shape chamfering, therefore even for example in the situation of the ora terminalis butt of the radial direction inboard of the end respect to one another of slide block and first and second circular-arc guide part, slide block is successfully guided on the circular-arc guide part of moving target and move.

The invention related according to technical scheme 4, except can obtaining the effect identical with technical scheme 3 described inventions, especially, because first and second circular-arc guide part, bight, radial direction inboard from the inboard edge of the radial direction of aforementioned each protuberance to the opposed end of aforementioned each circular-arc guide part links to each other with the curved surface of concavity, it is hereby ensured the gap of the activity between each circular-arc guide part and slide block.Like this, though when slide block is disposed between first and second circular-arc guide part the starting Sewing machines situation under, slide block is cooperated with each self-swinging of first and second pendular body, by with the switching wrist linking part centered by rotate.Its result can prevent the locking of Sewing machines.

The invention related according to technical scheme 5, except can obtaining the effect identical with technical scheme 1 or technical scheme 2 described inventions, especially, because first and second circular-arc guide part, near front end respect to one another edge, the outside has recess, it is hereby ensured the gap of the activity of the edge, the outside of each circular-arc guide part and the abutting part between the slide block.Like this, even for example in the situation of slide block with respect near edge, the outside inclination butt the front end of each circular-arc guide part, also guide shoe successfully.

Description of drawings

Fig. 1 is the side view of Sewing machines 301.

Fig. 2 is the oblique view of Sewing machines 301.

Fig. 3 is the oblique view that is arranged at the cloth feed apparatus 1 on the Sewing machines 301.

Fig. 4 is the oblique view of the cloth feed apparatus 1 that represents from the angle different from Fig. 3.

Fig. 5 is the brief strabismus map that represents the rear portion of cloth feed apparatus 1 from oblique upper.

Fig. 6 is the summary upward view at the rear portion of cloth feed apparatus 1.

Fig. 7 is the brief strabismus map that represents the rear portion of cloth feed apparatus 1 from oblique upper.

Fig. 8 is the summary upward view of

expression guide part

33,34 shape.

Fig. 9 is the expression Sewing machines guide part 33 in when starting, 34 and the diagrammatic illustration figure of slide block 22.

Figure 10 is the expression Sewing machines guide part 33 in when starting, 34 and the diagrammatic illustration figure of slide block.

Figure 11 is the brief strabismus map of the selection switching mechanism of the front and back feed cam in the existing Sewing machines of expression.

The specific embodiment

Below, use accompanying drawing to describe being used for implementing the specific embodiment of the present invention.Wherein, in the embodiment of the following stated, add technically multiple preferred restriction in order to implement the present invention, but scope of the present invention is not limited to following embodiment and illustrated example.

As shown in Figures 1 and 2, button sewing machine 301 has: pedestal part 302; Base station 200, it is arranged on the rearward end of pedestal part 302; Vertical body section 303, it uprightly is arranged on the base station 200; And arm 304, it is forwards to extend from the top of vertical body section 303 with the mode of pedestal part 302 almost parallels.Leading section at arm 304 is provided with needle bar 305, and it utilizes the driving of not shown sewing machine electromotor to move up and down, and in the lower end of needle bar 305 suture needle 306 is installed.And applicable cloth feed apparatus 1 of the present invention is arranged at base station 200 between the pedestal part 302.The below describes particularly to cloth feed apparatus 1.

Such as Fig. 1～Fig. 3 and shown in Figure 6, cloth feed apparatus 1 has: movable body 18, and it can left-right rotation and can move forward and backward; Cloth support 16, it is arranged at the leading section of this movable body 18; As the button clamp lever jaw of the cloth presser foot cloth pressing 307 of holding concurrently, it can link with movable body 18 up and down rotationally, is held between itself and the cloth support 16 by lower general who has surrendered's cloth clamp; Left and right sides feed cam body 4, it is formed for making the cam path (cam part) 3 of movable body 18 left-right rotation at outer peripheral face; As the front and back feed cam body 6 of the first cam body, it is formed for cam path (cam part) 5 that movable body 18 is moved forward and backward at outer peripheral face; As the front and back feed cam body 36 of the second cam body, it is formed for cam path 37 that movable body 18 is moved forward and backward with the pattern different from the first cam body at outer peripheral face; Swing wrist 31 as first of the first pendular body, it engages with cam path 5 and rotates centered by the fixed axis 11 of the first axle part spare on the upper surface that uprightly is arranged at along the vertical direction base station 200; Swing wrist 32 as second of the second pendular body, it engages with cam path 37 and rotates centered by the fixed axis 35 of the second axle part spare on the upper surface that uprightly is arranged at along the vertical direction base station 200; Switch wrist 21 as the front and back feeding of switching wrist, itself and movable body 18 link, and swing in the horizontal direction; And slide block 22, feeding was switched on the wrist 21 before and after it was arranged at free to rotately, was used for selectively switching the cam that movable body 18 is applied power.In addition, for

cam path

3,5, also can replace grooved cam, and adopt common edge cam.

Such as Fig. 1～shown in Figure 4, movable body 18 runs through the front and back of cloth feed apparatus and extends, and linking at the front and back of this movable body 18 pars intermedia has the button clamp lever jaw cloth pressing 307 of holding concurrently.The button clamp lever jaw cloth pressing 307 of holding concurrently, at its leading section clamping button, by with the linking part of movable body 18 centered by can arrange rotationally up and down, its leading section utilizes all the time pretension downwards of not shown spring.Be provided with hook 308 on the hold concurrently top of cloth pressing 307 of this button clamp lever jaw, this hook 308 is hooked on the hook 310 of hoisting mechanism 309.And, in the process of making beyond the time, utilize the hoisting mechanism 309 that is driven by not shown cam mechanism to keep making hook 310 to rise, thus button clamp lever jaw hold concurrently cloth pressing 307 the leading section antagonistic spring pretightning force and rise.Above-mentioned hook 308 has more near the place ahead more towards the rake 308a of below, and by hanging this rake 308a by hook 310, the movable body 18 of rising and each parts of linking with this movable body 18 are by pretension forwards.On the other hand, make if the user steps on not shown operating pedal and to make beginning, then utilize hoisting mechanism 309, hook 310 descends, and utilizes simultaneously spring, and the hold concurrently leading section of cloth pressing 307 of button clamp lever jaw descends.

Such as Fig. 1～shown in Figure 4, at the leading section of movable body 18 tabular cloth support 16 is installed.This cloth support 16 is arranged at the below of needle bar 305, and is arranged at the top of pedestal part 302.And, if put at cloth under the state on the upper surface that is stated from this cloth support 16, utilize spring with the hold concurrently leading section pretension downwards of cloth pressing 307 of button clamp lever jaw, then the hold concurrently leading section of cloth pressing 307 of button clamp lever jaw is crimped on the cloth support 16, and cloth clamp is held between the two.

Such as Fig. 2～shown in Figure 4, form the long slotted hole 17 of fore-and-aft direction at the front and back of movable body 18 pars intermedia, in this slotted hole 17, insert square slider 20a.Square slider 20a can slide along slotted hole 17 front and back, utilizes simultaneously not shown shoulder bolt axle to be supported on the base station 200.That is, movable body 18 can rotate centered by shoulder bolt, can utilize square slider 20a and slotted hole 17 to move forward and backward simultaneously.

Such as Fig. 3, Fig. 4, shown in Figure 6, the rear of the slotted hole 17 in movable body 18 links the left part of connecting rods 24 via the turning cylinder 25 of above-below direction, and this connecting rod 24 can arrange centered by turning cylinder 25 rotationally with respect to movable body 18.On the other hand, the right part of connecting rod 24 is via the upper surface binding of axle 27 with the base station 200 of above-below direction, and with respect to base station 200, connecting rod 24 can rotate centered by axle 27.And, utilizing this connecting rod 24, the track of turning cylinder 25 is restricted to the circular arc of the fore-and-aft direction centered by axle 27.

Such as Fig. 4, shown in Figure 6, in the rearward end of the movable body 18 at turning cylinder 25 rears, form the long slotted hole 19 of fore-and-aft direction.In addition, connecting rod 201 is set on the rearward end of movable body 18 overlappingly, because the axle 61 that is arranged at the above-below direction on these connecting rod 201 leading sections inserts in the slotted hole 19 via square slider, so axle 61 can move up in front and back along slotted hole 19 with respect to movable body 18.The rearward end of connecting rod 201 can be rotated around the fixed axis 203 of above-below direction, is installed on the upper surface of base station 200.

Such as Fig. 6, shown in Figure 7, configuration camshaft 2 and

cam body

4,6 and 36 below base station 200.

Camshaft 2 extends upward at right and left, can be around its axle center rotation.This camshaft 2 is corresponding with stepping on of the not shown sewing machine pedal that is undertaken by the user, via not shown linkage, is rotated when arrow A direction (top) shown in Figure 1 is rotated at the leading section of action bars 50.Namely, the tilting cam (omitting diagram) that is arranged at the leading section right flank of action bars 50 by the connection shaft utilization that makes not shown bolt mechanism is mobile to the right, make the pulley 51 and the camshaft 2 that are driven by sewing machine electromotor become connecting state, thus camshaft 2 rotations.In addition, on this camshaft 2, be fixed with in parallel to each other discoid front and back feed cam body 6, left and right sides feed cam body 4, and front and back feed cam body 36.These

cam bodies

4,6,36 and camshaft 2 become one and can rotate.In addition, in Fig. 6, observe easily in order to make accompanying drawing, omit the diagram of base station 200.

As shown in Figure 6, outer peripheral face at front and back feed cam body 6 forms corrugated front and back feed cam groove 5, side face at left and right sides feed cam body 4 forms corrugated left and right sides feed cam groove 3, at the corrugated front and back of side face formation of front and back feed cam body 36 feed cam groove 37.This this

cam path

3,5,37 formed around camshaft 2 one week, and each

cam path

3,5,37 shape are different.

As shown in Figure 6, above left and right sides feed cam body 4, be provided with the long left and right sides feeding in front and back with swinging wrist 9.Left and right sides feeding is with swinging wrist 9, and the end can be around fixed axis 8 rotations of above-below direction, with the upper surface binding of base station 200 thereafter.With the lower surface of the leading section that swings wrist 9 roller 10 is installed in left and right sides feeding, this roller 10 is chimeric with left and right sides feed cam groove 3.Like this, left and right sides feeding is with swinging wrist 9, follows the rotation of left and right sides feed cam body 4 and during along corrugated left and right sides feed cam groove 3 move left and right, rotates centered by fixed axis 8 at roller 10.In addition, such as Fig. 4, shown in Figure 5, with the upper surface that swings wrist 9, protrude the circular-arc guide part 66 that arranges centered by axle 61 in left and right sides feeding.

Such as Fig. 4, shown in Figure 6, above front and back feed cam body 6, be provided with as first of the first pendular body and swing wrist 31, it is L word shape when overlooking, above front and back feed cam body 36, with first swing wrist 31 and on left and right directions, relatively be provided with as second of the second pendular body and swing wrist 32, it is L word shape when overlooking.

These first swing wrists 31 and second swing wrist 32 to have: first swings wrist 31a and second swings wrist 32a, its on the above-below direction respectively by uprightly being arranged at supporting as the fixed axis 11 of the first axle part spare and as the fixed axis 35 of the second axle part spare on the base station (frame) 200, swing along the

cam path

5,37 of front and back feed cam body 6 and front and back feed cam body 36 respectively simultaneously; And as the first guide part 33 of the first circular-arc guide part with as the second guide part 34 of the second circular-arc guide part, its circular-arc centered by laggard turning cylinder 25 of giving the oscillation center of switching wrist 21 before forming respectively, first swing that swings wrist 31a and the second swing wrist 32a of disposing with the mode of facing mutually each other with front end links, and swings in the horizontal direction centered by

fixed axis

11,35 respectively.

First swings wrist 31, the bend of its L word shape can be rotated around the fixed axis 11 of above-below direction, link with the upper surface of base station 200, extend upward in front and back from bend to an end, extend upward at right and left from bend to the other end (with reference to Fig. 6).At this first lower surface that swings an end of wrist 31, the roller 14 as the first engaging part is installed, this roller 14 is chimeric with front and back feed cam groove 5.Like this, first swings wrist 31, the rotation of feed cam body 6 before and after roller 14 is followed and during along the waveform move left and right of front and back feed cam groove 5, rotating centered by fixed axis 11.

Second swings wrist 32, the bend of its L word shape can rotate around the fixed axis 35 with abreast upright setting on above-below direction of fixed axis 11, link with the upper surface of base station 200, extend upward in front and back from bend to an end, extend upward at right and left from bend to the other end.Here,

fixed axis

8,11,35 disposes in the mode that is parallel to each other.At the second lower surface that swings an end of wrist 32 roller 38 as the second engaging part is installed, this roller 38 is chimeric with front and back feed cam groove 37.Like this, second swings wrist 32, the rotation of feed cam body 36 before and after roller 38 is followed and when carrying out move left and right along the waveform of front and back feed cam groove 37, rotating centered by fixed axis 35.In addition, in Fig. 5, observe easily in order to make accompanying drawing, omit the diagram of the first swing wrist 31.

Here, according to Fig. 8, Fig. 9 the first guide part 33 in the present embodiment and the second guide part 34 are at length described.

The first guide part 33 protrudes and is arranged at from the first bend that swings wrist 31 to the upper surface of the other end, and the second guide part 34 protrudes to be arranged at from second and swings the bend of wrist 32 to the upper surface of the other end.The first guide part 33 is positioned at the position of separating from the second guide part 34 to the right, forms the gap between the right-hand member of the left end of the first guide part 33 and the second guide part 34.

And, in in the present embodiment the first guide part 33 and the second guide part 34, on leading section separately respect to one another, be respectively equipped with

protuberance

33a, 34a, they are arranged in the radial direction outside of each

guide part

33,34 circular arc, give prominence to towards the guide part of opposite side respectively.

Protuberance

33a, 34a, such as Fig. 6～shown in Figure 9, front end separately is the curve form of convex towards the guide part of opposite side when overlooking.In addition, the edge, the outside from first and

second guide part

33,34 to separately

protuberance

33a, 34a radial direction links to each other with same side face.In addition, first and

second guide part

33,34 has respectively chamfered

section

33b, 34b, and they are that the inboard bight of radial direction of end respect to one another forms with the curve form chamfering.

In addition, each circular-

arc guide part

33,34 opposed end, from the inboard edge of the radial direction of each

protuberance

33a, 34a to circular-arc guide part 33, the inboard bight of radial direction of 34 opposed end, concavity curved face part 33c, the 34c to each

guide part

33,34 sides depression links to each other when overlooking respectively.And, near the edge, the outside first and second guide part 33 respect to one another, 34 the separately front end, be provided with when overlooking

recess

33d, 34d with curved surface shape depression.And, these

recesses

33d, 34d, mobile easily between first and

second guide part

33,34 in order to make slide block 22, preferably form with the radius of curvature identical with separately chamfered

section

33b, 34b.

Below, swing wrist 31, left and right sides feeding and describe with the rotational motion that swings wrist 9, the second swing wrist 32 and the mechanism that is passed to movable body 18 optionally switching first.

Such as Fig. 3～shown in Figure 5, the leading section of connecting rod 201 and axle 61 link.Right part at left and right sides feeding wrist 62 arranges slide block 64, and slide block 64 can engage with guide part 66.

Such as Fig. 3, Fig. 4, shown in Figure 6, wrist 21 is switched in feeding before and after movable body 18 configurations, and it extends upward in front and back, works as the switching wrist among the present invention.Before and after feeding switch wrist 21, its leading section is linked to fixed axis 11 abreast on the upright turning cylinder 25 that arranges on the above-below direction, can rotate around this turning cylinder 25.The rearward end of switching wrist 21 in the front and back feeding is provided with slide block 22, it has inside and outside sliding

contact surface

22e, 22f (with reference to Fig. 9, Figure 10) with each

guide part

33,34 sliding-contacts, the rotation that wrist 21 is switched in the front and back feeding of utilization centered by turning cylinder 25, slide block 22 moves with circular-arc motion track.

And slide block 22 can be optionally forms two sides, front and back 33e, the 33f of the first circular-arc guide part 33 with motion track along this slide block 22 and two sides, front and back 34e, the 34f of the second guide part 34 engages.Namely, slide block 22 is in order to engage with the first guide part 33 or the second guide part 34 sliding-contacts ground, become at its lower surface and have circular-arc groove centered by turning cylinder 25, be the shape of open to the lower side roughly コ word shape along the vertical section of radial direction.This slide block 22 switches wrist 21 bindings with the front and back feeding via the axle of above-below direction free to rotately.And, feeding was switched wrist 21 with respect to the swing of movable body 18 before and after slide block 22 utilized, with two end edge portion sliding-contacts inside and outside first and

second guide part

33,34 the radial direction and mobile, optionally engage with first and

second guide part

33,34, under slide block 22 and state that the first guide part 33 engages, slide block 22 does not engage with the second guide part 34, and under slide block 22 and state that the second guide part 34 engages, slide block 22 does not engage with the first guide part 33.

In addition, switch on the wrist 21 in the front and back feeding, link rearward extended handover operation bar 29, the user is by the rearward end of operation handover operation bar 29, and feeding switching wrist 21 rotates centered by turning cylinder 25 before and after making, and utilizes this rotation, slide block 22 is optionally engaged with the first guide part 33 or the second guide part 34, movable body 18 moves via this slide block 22, cloth clamp is held in cloth support 16 and button clamp lever jaw is held concurrently between the cloth pressing 307, and the front and back feeding.

In addition, in the cam path separately 5 and cam path 37 of front and back feed cam body 6 and front and back feed cam body 36, in order to pass through operation handover operation bar 29, when slide block 22 is moved between two guide parts 33 and guide part 34, make the position of two guide parts 33 and guide part 34 consistent with the motion track of slide block 22, be respectively equipped with and make two guide parts 33 and guide part 34 along the initial point section (not shown) of the track proper alignment of handover operation bar 29.

And constitute, during stopping when the power connection of button sewing machine 301 and after the sewing finishing, camshaft 2 makes roller 14 and the roller 38 that engages respectively with two cam bodies 6 and cam body 36, is stopping with the aforementioned initial point section of separately cam body chimeric origin position.Utilize said structure, during stopping when power connection and during sewing finishing, namely, roller 14 and roller 38 respectively with the initial point section of front and back feed cam body 6 and front and back feed cam body 36 chimeric state under, if the user operates handover operation bar 29, the rotation (rotation) that wrist 21 is switched in feeding before and after then utilizing, the state that can engage with the first guide part 33 from slide block 22, switch to the state that slide block 22 engages with the second guide part 34, or oppositely switch.In addition, in Fig. 6, observe easily in order to make accompanying drawing, omit the diagram of handover operation bar 29.

Under slide block 22 and state that the first guide part 33 engages, slide block 22 can slide along the first guide part 33, but by utilizing the rotation of the handover operation bars 29 of restriction centered by turning cylinder 25 such as retainer, make slide block 22 with respect to the clamped position locking of the first guide part 33.Similarly, under slide block 22 and state that the second guide part 34 engages, slide block 22 can slide along the second guide part 34, but by utilizing the rotation of the handover operation bars 29 of restriction centered by turning cylinder 25 such as retainer, makes slide block 22 with respect to the clamped position locking of the second guide part 34.

Like this, cloth feed apparatus 1 utilizes first and second guide part 33 of selecting, 34 swing by the movement of slide block 22, and movable body 18 is moved, and is held on the cloth that cloth support 16 and button clamp lever jaw hold concurrently between the cloth pressing 307 and moves forward and backward thereby make.

Below, action and the using method of cloth feed apparatus 1 described.

At first, if left and right sides feed cam body 4 rotations, then utilize left and right sides feed cam groove 3, left and right sides feeding is with swinging wrist 9 left-right rotation centered by fixed axis 8, this rotation is passed to connecting rod 201 by left and right sides feeding wrist 62, and then the action of the leading section of connecting rod 201 is passed to movable body 18 via the square slider that engages with slotted hole 19, and movable body 18 is left-right rotation centered by square slider 20a.Thus, the leading section of movable body 18 swings, and makes to be held on hold concurrently the cloth left and right sides feeding between the cloth pressing 307 of cloth support 16 and button clamp lever jaw, simultaneously, makes to be clipped in hold concurrently button left and right sides feeding on the leading section of cloth pressing 307 of button clamp lever jaw.

Then, operate handover operation bar 29 by the user, slide block 22 is engaged with the first guide part 33.Under this state, if front and back feed cam body 6 rotates, feed cam groove 5 before and after then utilizing from bend front and back rotation centered by fixed axis 11 to the left part of the first swing wrist 31, switches wrist 21 via the front and back feeding, and movable body 18 is moved forward and backward.Thus, make to be held on the feeding before and after the cloth between the cloth pressing 307 of holding concurrently of cloth support 16 and button clamp lever jaw, simultaneously, make to be clipped in the button clamp lever jaw feeding before and after the button on the leading section of cloth pressing 307 of holding concurrently.

On the other hand, if operate handover operation bar 29 by the user, so that the state that slide block 22 engages with the second guide part 34 makes 36 rotations of front and back feed cam body, cam path 37 before and after then utilizing, from bend front and back rotation centered by fixed axis 35 to the right part of the second swing wrist 32, switch wrist 21 by the front and back feeding movable body 18 is moved forward and backward.Thus, make to be held on the feeding before and after the cloth between the cloth pressing 307 of holding concurrently of cloth support 16 and button clamp lever jaw, simultaneously, make to be clipped in the button clamp lever jaw feeding before and after the button on the leading section of cloth pressing 307 of holding concurrently.

Like this, the front and back feeding of button and cloth has these two kinds of patterns of situation that situation that slide block 22 engages with the first guide part 33 and slide block 22 engage with the second guide part 34.In addition, by the position of change slide block 22 along the first guide part 33, or change slide block 22 along the position of the second guide part 34, the amplitude of fluctuation of feeding before and after changing.

Because

cam body

4,6,36 utilizes camshaft 2 to become one and is rotated, therefore above-mentioned front and back feeding and left and right sides feeding combination, cooperate with the feeding of button and cloth by suture needle 306 to move up and down, with the stitching of コ word shape or X word shape with the button staple on cloth.In addition, the cycle that seesaws, the cycle of side-to-side movement and seesaw and the timing of side-to-side movement, depend on

cam path

3,5,37 shape.

In addition, when the user operated handover operation bar 29, suture needle 306 stopped, and camshaft 2 also stops at above-mentioned origin position simultaneously.And, withdraw from from cloth support 16 in order to make cloth, utilize the hoisting mechanism 309 that is driven by not shown cam mechanism and the hook 310 that rises and the rake 308a engaging of hook 308, the hold concurrently leading section of cloth pressing 307 of button clamp lever jaw rises.If act on rake 308 by linking up with 310, the hold concurrently leading section of cloth pressing 307 of button clamp lever jaw is risen, then forwards load can act on movable body 18, but, because this load is born via the 33e of front and back sides section, 33f and 34e, the 34f of slide block 22 by the first guide part 33 or the second guide part 34, so movable body 18 can forwards not move.

But, act on load forwards on the movable body 18 on slide block 22.Under this state, if operator's operation is in order to change the stitching shape, hope is for example rotated handover operation bar 29 from the first guide part 33 side direction the second guide part 34 sides, feeding is switched wrist 21 around turning cylinder 25 rotations before and after then will making, slide block is broken away from from the first guide part 33, move to the second guide part 34.At this moment, bear the load forwards that acts on the movable body 18, and utilize and to move the second guide part 34 sides of confined slide block 22 with engaging of the first guide part 33, temporarily break away from the edge, the outside of the first guide part 33, can produce arrow R direction shown in Figure 8 turning moment and in the clockwise direction the rotation.But, in the present invention, the edge, the separately outside of the first guide part 33 and the second guide part 34 these two guide parts, on separately leading section respect to one another, be provided with respectively towards opposite side outstanding protuberance 33a and 34a, constitute and make slide block 22 when moving to another guide part from a guide part, the distance that breaks away from from the edge, the outside of each guide part is as far as possible short, can reduce the rotation amount of the slide block 22 that is produced by the above-mentioned turning moment that acts on the slide block 22, can make slide block 22 successfully move to another guide part 33,34 from some guide parts 33,34.

In addition, as mentioned above, during stopping when the power connection of button sewing machine 301 and during sewing finishing, camshaft 2 constitutes, in order to make slide block 22 switch to another

guide part

33,34 from a

guide part

33,34, the origin position of each

guide part

33,34 on the circular arc that is positioned at centered by turning cylinder 25 stopped.But, all make camshaft 2 stop at exactly above-mentioned origin position at every turn and have difficulties, produce inevitably some fluctuations.Therefore, during each

guide part

33,34 stopping when power connection and during sewing finishing, for respect to the circular arc centered by turning cylinder 25, under the state that produces a little bias, stop.In this case, try one's best on the contrary littlely with the aforesaid rotation amount that must make the slide block 22 that the load of being born by movable body 18 produces, as slide block 22, its rotary freedom is more high more favourable,

But according to the cloth feed apparatus 1 of present embodiment, even respectively swing

wrist

31,32 under a little state that departs from (with reference to Fig. 9), also can easily make slide block 22 move to any guide part 33,34.Namely, in the present embodiment, because each guide

part

33,34, have chamfered section 33b, the 34b, concavity curved

face part

33c, 34c and recess 33d, the 34d that are positioned at each

guide part

33,34 inboard edge in end respect to one another, therefore can easily move.

Here, according to Fig. 9, Figure 10, illustrate in greater detail chamfered

section

33b, 34b, concavity curved

face part

33c, 34c and the recess 33d that is arranged on each

guide part

33,34, the effect at this each position of 34d.In addition, here, as shown in Figure 9, describe as an example of following situation example, that is, be positioned at the first guide part 33 in the situation in the place ahead of the second guide part 34, shown in arrow S, slide block 22 is moved from the second guide part 34 to the first guide part 33.

At first, as shown in Figure 9, if slide block 22 is moved to arrow S direction, the concavity curved face part 33c butt of the right-hand end P1 of the inner slide contact-making surface 22e of slide block 22 and the first guide part 33 then, apply the revolving force of arrow G 1 direction to slide block 22, slide block 22 is to arrow G 1 direction rotation.If slide block 22 moves to arrow S direction on one side to arrow G 1 direction rotation on one side, then as shown in figure 10, the left end P2 of the inner slide contact-making surface 22e of slide block 22 moves towards protuberance 34a along the chamfered section 34b of the second guide part 34, and the right-hand end P3 of the outside sliding contact surface 22f of slide block 22 engages with the recess 33d of the first guide part 33 simultaneously.Here, because recess 33d is arranged so that slide block 22 further increases the rotary freedom of G directions, even in the situation that therefore the first guide part 33 forwards departs from further with respect to the second guide part 34, also can make slide block 22 easily mobile.

And then, if slide block 22 moves to arrow S direction, the right-hand end P3 of the outside sliding contact surface 22f of the slide block 22 that then engages with the recess 33d of the

first guide part

33,33d detaches from recess, the outboard end P1 of the inner slide contact-making surface 22e of slide block 22 is directed to the chamfered section 33b of the first guide part 33 simultaneously, to the direction rotation of arrow G 2, one side engages with two sides 33e, the 33f of the first guide part sliding contact surface 22e, the 22f of slide block 22 on one side.Similarly, be positioned at the second guide part 34 under the state of front side of the first guide part 33, also can make slide block 22 from the first guide part 33 to the second guide part 34 side shiftings.

As mentioned above, because each chamfered

section

33b, 34b, concavity curved

face part

33c, 34c and

recess

33d, 34d form, so that when slide block 22 moves between the first guide part 33 and the second guide part 34, slide block 22 is rotated with larger angle, therefore, slide block 22 can be successfully more mobile between each guide

part

33,34.

In addition, by above-mentioned each guide part 33 is set, 34

protuberance

33a, 34a, each

chamfered section

33b, 34b, concavity curved

face part

33c, 34c, and

recess

33d, 34d, make each guide

part

33,34 front end forms the inside and outside sliding contact surface 22e than slide block 22, the shape that 22f is narrow, therefore immediately be disposed at two guide parts 33 at slide block 22, in the situation between 34, step on the operating pedal of Sewing machines 301 and make camshaft 2 rotations, also can make each guide

part

33,34 front end is at the inside and outside Slideslip contact-making surface 22e of slide block 22, swing between the 22f, even camshaft 2 rotates, also can prevent damage and the locking of Sewing machines 301.

As mentioned above, cloth feed apparatus 1 according to the Sewing machines of present embodiment, because each

protuberance

33a, 34a is arranged at each

guide part

33,34 the radial direction outside, therefore the swing that wrist 21 is switched in feeding before and after utilizing makes slide block 22 move to the second guide part 34 or reverse when mobile from the first guide part 33, even by hoisting mechanism 309 to movable body 18 effect load forwards, also can stop slide block 22 rotations, thereby prevent each guide part 33, slide block 22 between 34 is forwards mobile namely to be departed from, therefore, can make slide block 22 along

guide part

33,34 is successfully mobile.

In addition, according to the cloth feed apparatus 1 as the Sewing machines of present embodiment, because each chamfered

section

33b, 34b, concavity curved

face part

33c, 34c and

recess

33d, 34d are set, so slide block 22 can be more smooth mobile between each guide

part

33,34.

Further, by above-mentioned each guide part 33 is set, 34

protuberance

33a, 34a, each

chamfered section

33b, 34b, concavity curved

face part

33c, 34c, and

recess

33d, 34d, make each guide

part

33,34 front end forms the inside and outside sliding contact surface 22e than slide block 22, the shape that 22f is narrow, even therefore be disposed at two guide parts 33 at slide block 22, in the situation between 34, step on the operating pedal of Sewing machines 301 and make camshaft 2 rotations, also can make each guide

part

33,34 front end is 22e between the inside and outside Slideslip contact-making surface of slide block 22, swing between the 22f, even camshaft 2 rotates, also can prevent damage and the locking of Sewing machines 301.

Namely, even in the situation that Sewing machines 301 starts when slide block 22 is disposed between the first guide part 33 and the second guide part 34, because slide block 22 can swing wrist 31 with first and second, each self-swinging of 32 cooperates, centered by switching the connection shaft of wrist 21 with the front and back feeding, rotate, therefore, can prevent damage and the lockup state of Sewing machines 301.

In addition, the invention is not restricted to above-mentioned embodiment, in the scope that does not break away from purport of the present invention, can carry out various improvement and design alteration.

Claims

1. the cloth feed apparatus of a Sewing machines, it has:

Movable body, it arranges the cloth support at front end, can left-right rotation and can move forward and backward;

Cloth presser foot, it can be rotationally on above-below direction links with aforementioned movable body, is held between itself and the aforementioned cloth support by lower general who has surrendered's cloth clamp;

First and second cam body, they form respectively cam part at outer peripheral face;

Switch wrist, itself and aforementioned movable body link, and swing in the horizontal direction;

First and second swings wrist, they respectively axle be supported on first and second spindle unit that uprightly is arranged on the frame, swing along the cam part of aforementioned first and second cam body respectively;

First and second pendular body, they and aforementioned first and second swing the swing interlock of wrist, swing in the horizontal direction centered by aforementioned first and second spindle unit respectively;

First and second circular-arc guide part, they are arranged on aforementioned first and second pendular body, form circular-arc centered by the oscillation center of aforementioned switching wrist, and the mode of facing mutually each other with front end disposes relatively; And

Slide block, it is arranged on the aforementioned switching wrist, can optionally engage with two circular-arc guide parts, and the circular-arc guide part along with the swing of aforementioned switching wrist along engaging slides,

By the swing that utilizes aforementioned first or the second guide part that aforementioned slide block optionally engages aforementioned movable body is moved, make the cloth that is held between aforementioned cloth support and the aforementioned cloth presser foot about or at least one direction in the front and back mobile, it is characterized in that

Aforementioned first and second circular-arc guide part, on end separately respect to one another, has respectively protuberance, this protuberance is positioned at the radial direction outside of each circular-arc guide part, and towards the guide part of opposite side and give prominence to, edge, the radial direction outside from aforementioned first and second circular-arc guide part to aforementioned protuberance links to each other with same side face

Aforementioned first and second circular-arc guide part, near the edge, the outside front end separately respect to one another has recess.

2. the cloth feed apparatus of Sewing machines according to claim 1 is characterized in that, aforementioned protuberance, and its front end becomes curve form.

3. the cloth feed apparatus of Sewing machines according to claim 1 and 2 is characterized in that,

Aforementioned first and second circular-arc guide part, the inboard bight of the radial direction of end respect to one another is with curved surface shape chamfering.

4. the cloth feed apparatus of a Sewing machines, it has:

Aforementioned first and second circular-arc guide part, from the inboard edge of the radial direction of aforementioned each protuberance to the inboard bight of the radial direction of the opposed end of aforementioned each circular-arc guide part, continuous with the curved surface of concavity.

5. the cloth feed apparatus of Sewing machines according to claim 4 is characterized in that,

6. the cloth feed apparatus of Sewing machines according to claim 4 is characterized in that,

Aforementioned protuberance, its front end becomes curve form.

7. the cloth feed apparatus of the described Sewing machines of any one in 6 according to claim 4 is characterized in that,