CN1796633A - Feeding regulating device of sewing machine - Google Patents

Abstract

The feeding regulating mechanism (31) of the sewing machine in the invention includes: a feeding regulating plate (35) which is arranged at the machine frame of the sewing machine; a feeding regulator (36) which regulates the rotating angle according to the regulating quantity of the feeding regulating plate (35); and a feeding regulator (20) which produces the sending-cloth quantity of the feeding tooth according to the rotating angle of the feeding regulator (36), it has the following characters, the feeding regulating plate (35) is provided with axis component (35a) which does advancing and retreating movement with the rotating operation, the feeding regulator (36) is provided with cam wheel part (36a) which collides with the axis element (35a) of the feeding regulating plate (35), besides, the first feeding regulating cam surface (36b) which is provided with the length corresponding to the feeding regulating plate (35) initially rotating by one circle and the second feeding regulating cam surface (36c) which is provided with the length corresponding to the feeding regulating plate (35) last rotating by one circle are formed at the cam wheel part (36a).

Description

The feed regulation of Sewing machines

(1) technical field

The present invention relates to make feeding adjustment disk rotation 1 circle or rotate the above rotating operation of 1 circle, and can enlarge the feed regulation of Sewing machines of adjustable range of the cloth feed amount of adjusting work feed.

(2) background technology

In the past on industrial sewing machines and home-use Sewing machines, be provided with and a kind ofly the cloth feed amount of processing cloth can be switched to positive feeding or contrary feeding, and can regulate the feed regulation of cloth feed amount by the rotating operation of feeding adjustment disk.

The Sewing machines put down in writing of Japanese patent laid-open 6-292778 communique (hereinafter referred to as patent documentation 1) for example, inside at sewing machine body, be provided with positive feeding face and contrary feeding face are formed the operation board that the feed regulator of V word shape and leading section have the feeding adjustment screw that can conflict with the cam surface of V word shape, simultaneously in the inside of support portion, be provided with the feeding switch etc. that is connected and produces the cloth feed amount of feeding tooth by connecting rod with feed regulator.When using above-mentioned Sewing machines, if the rotating operation operation board changes the gradient of feed regulator, then the gradient of feeding switch also changes the cloth feed amount of variable thus feeding tooth along with this change.

But, in above-mentioned Sewing machines, because of operation board is provided with restriction projection, so when the manual operation operation board, this restriction projection is in the scope of conflicting with the restriction portion of sewing machine body side, promptly carry out rotating operation in operation board rotates 1 scope of enclosing.Therefore, the cloth feed amount adjustable range of feeding tooth is constrained to rotation 1 circle that can only carry out operation board.

For example in Zigzag sewing machine,,, stitch so can be suitable for common complications owing to cloth feed amount can be changed in 0～about 2.5mm scope by rotation 1 ring manipulation of operation board although the operational ton of operation board is constrained to and can only rotates 1 circle as mentioned above.

Yet,, need the big cloth feed amount of 2～3mm sometimes with the occasion of Zigzag sewing machine as sewing machine for covering chain stitch (vertical masonry joint Sewing machines) use.This occasion, must change the feed regulator that can in 0～about 5mm scope, change cloth feed amount by rotation 1 circle of operation board, perhaps have to use the another kind of Zigzag sewing machine that can in 0～about 5mm scope, strengthen the change cloth feed amount by rotation 1 ring manipulation of operation board, thereby have the cloth feed amount versatility of separate unit Zigzag sewing machine, the problem of bad adaptability.

And, compare with the Zigzag sewing machine that can in 0～about 2.5mm scope, change cloth feed amount, can in 0～about 5mm scope, strengthen in the Zigzag sewing machine of change cloth feed amount at rotation 1 ring manipulation by operation board, the rate of change of the regulation amount of spin of the relative operation board of cloth feed amount is big, has the problems such as fine setting difficulty of work feed.

(3) summary of the invention

The object of the present invention is to provide a kind of adjustable range that can not only enlarge cloth feed amount, and can finely tune the feed regulation of the Sewing machines of cloth feed amount.

The feed regulation of Sewing machines of the present invention comprises: be located at the feeding adjustment disk on the machine frame of Sewing machines; Regulate the feed regulator of rotational angle according to the regulating quantity of this feeding adjustment disk; Produce the feeding switch of the cloth feed amount of feeding tooth according to the rotational angle of this feed regulator, it is characterized in that, described feeding adjustment disk has by its rotating operation mobile shaft component of advancing and retreat, described feed regulator has the cam part of conflicting with the shaft component of described feeding adjustment disk, form on the described cam part have with the 1st feeding adjustment cam face of the corresponding length of initial rotation 1 circle part of described feeding adjustment disk and have with described feeding adjustment disk after once rotate the 2nd feeding adjustment cam face of the corresponding length of 1 circle part.

Adopt said structure, preferably with respect to the face of the shaft component quadrature of described feeding adjustment disk, the inclination angle of described the 2nd feeding adjustment cam face is set for littler than the inclination angle of described the 1st feeding adjustment cam face.

Another preferably structure be: be provided with the limit rotation member that has rotated the rotation of the described feeding adjustment disk of restriction on the initial position that rotates 1 circle part approximately at described feeding adjustment disk.Better structure is to be provided with to remove the restriction cancellation member of described limit rotation member to the limit rotation of described feeding adjustment disk again.

Another preferably structure be: described limit rotation member can be arranged in the described machine frame with advancing and retreat, and, its leading section is subjected to the elastic force-applying of the force application component that can conflict with the holding section of described feeding adjustment disk, and described restriction cancellation member has: the fastened component that engages with described limit rotation member; Carry out to remove the releasing operating portion of described limit rotation member and the releasing that the engages operation of described holding section by this fastened component.

Another good structure is: described limit rotation member can be set in the described machine frame with advancing and retreat, and, its leading section is subjected to the elastic force-applying of the force application component that can conflict with the holding section of described feeding adjustment disk, and described restriction cancellation member has: the fastened component that engages with described limit rotation member; Carry out to remove the releasing operating portion of described limit rotation member and the releasing that the engages operation of described holding section by this fastened component.

And, preferably that described releasing operating portion and described fastened component is integrally formed.In addition, a kind of structure preferably is: the work feed scale that is marked with initial rotation 1 circle part on the display surface of described feeding adjustment disk side by side and after once rotate the work feed scale of 1 circle part.When adopting this structure, the work feed scale that preferably makes described initial rotation 1 circle part with described after once to rotate the demonstration form of 1 circle work feed scale partly different.

(4) description of drawings

Fig. 1 is the front view of the Zigzag sewing machine in one embodiment of the invention.

Fig. 2 is located at the feeding tooth driving mechanism in the Zigzag sewing machine and the stereogram of feed regulation.

Fig. 3 is the stereogram of the bottom surface of feeding tooth driving mechanism and feed regulation.

Fig. 4 is the local enlarged front view of the post portion of Zigzag sewing machine.

Fig. 5 A is the front view of the positive feeding adjustment disk of cloth feed amount when being zero.

Fig. 5 B is the major part vertical profile side view of the positive feed regulation of cloth feed amount when being zero.

Fig. 6 is the cross-sectional vertical view of major part of positive feed regulation and limit rotation mechanism.

Fig. 7 is the side view of positive feed regulator.

Fig. 8 A is the major part vertical profile side view of the positive feed regulation of cloth feed amount hour.

Fig. 8 B is the front view of the positive feeding adjustment disk of cloth feed amount hour.

Fig. 9 lifts restrictions to remove the figure suitable with Fig. 6 of the restriction of selling.

Figure 10 A is the major part vertical profile side view of the positive feed regulation of cloth feed amount when big.

Figure 10 B is the front view of the positive feeding adjustment disk of cloth feed amount when big.

Figure 11 is the line chart of the relation of expression scale of positive feeding adjustment disk and forward stitch amount.

Figure 12 is the figure suitable with Fig. 9 of the 1st variation of the present invention.

Figure 13 is the figure suitable with Fig. 7 of the 2nd variation of the present invention.

(5) specific embodiment

Below with reference to Fig. 1～Figure 11 one embodiment of the invention are described.

As shown in Figure 1, Zigzag sewing machine M comprises: support portion 1; The upright post portion 2 that is located at the right side part of support portion 1; With support portion 1 opposite to each other from the top of post portion 2 to the horn portion 3 that left extends; Be located at the chain-drive section 4 of the left part of horn portion 3.Be provided with thread cutting mechanism (not shown) and rotating shuttle (not shown) etc. in support portion 1, loading and unloading are equipped with the shuttle of reeling and rolling off the production line freely in this rotating shuttle.

Be provided with the not shown main shaft that drives by electrical motor of sewing machine in the inside of horn portion 3, in chain-drive section 4, be provided with the needle bar drive device (not shown) that shank 5 is driven up and down by this main shaft and make needle bar swinging mechanism (not shown) that this shank 5 swings etc.In post portion 2, be provided with: the positive feeding adjustment disk 35 that the forward stitch amount of processing cloth forward work feed is regulated; The contrary feeding adjustment disk 60 that the contrary cloth feed amount of processing cloth reverse work feed is regulated; The back stitching handle 64 that the manual operation back stitching is used etc.

Below the feeding tooth driving mechanism 10 that drives the feeding tooth along fore-and-aft direction (cloth feeding direction) driving feeding tooth 14, while is along the vertical direction described.At this, feed regulation 30 described later is connected with feeding tooth driving mechanism 10.

As Fig. 2, shown in Figure 3, in support portion 1, be equipped with the lower shaft 11 of the left and right directions that rotatably is supported in machine frame F, by not shown synchronous belt, carry out the driving of regulation direction of rotation by electrical motor of sewing machine.Be connected with eccentric shaft 12 in the left part of this lower shaft 11, and the left part of eccentric shaft 12 is connected with the feeding table 15 of feeding tooth 14 by the connecting rod 13 that moves up and down.

On the other hand, at the rear side of lower shaft 11, be equipped with the swinging axle 16 parallel with the lower shaft 11 that rotatably is supported in machine frame F, the rearward end of feeding table 15 is propped up in the upper end that is fixed in the feeding rod 17 on this swinging axle 16 by pivot.Thus, in case drive lower shaft 11 by electrical motor of sewing machine rotation, eccentric shaft 12 swing up and down and swing in, because of horizontal hunting be subjected to the moving up and down restriction of connecting rod 13, so feeding table 15 serves as to swing fulcrum to be driven up and down with end thereafter.

On the other hand, in the front side of lower shaft 11, be equipped with and form horizontal feeding switch 20 cylindraceous, on this feeding switch 20, sliding shoe (square) 21 is fastened on the bending sliding tray 20a with axial quadrature slidably.The rearward end of the connecting rod 22 of fore-and-aft direction is connected with the swing arm 23 of the right part that is fixed in swinging axle 16, and the leading section of this connecting rod 22 is connected with sliding shoe 21.

Connecting rod 22 is in the side after a while of the roughly middle part of its fore-and-aft direction, be embedded in lower shaft 11 outward on a end of ring-type eccentric wheel 25 on the affixed eccentric cam 24 be connected.But the amount of spin around trunnion axis of feeding switch 20 is sent adjusting to by feed regulation 30 described later.

Thus, because of the rotation of eccentric wheel 25 along with lower shaft 11 moves up and down, so connecting rod 22 serves as that to make leading section be that sliding shoe 21 moves up and down along sliding tray 20a to the swing fulcrum with end thereafter.At this moment, corresponding with the rotational angle around trunnion axis of feeding switch 20, connecting rod 22 carries out swing, promptly carries out positive feeding swing or contrary feeding swing in the time at work feed by sliding shoe 21, therefore, along with the rotation of the swinging axle 16 that is connected with connecting rod 22, feeding table 15 carries out swing.

Below the feed regulation 30 that is used for the cloth feed amount of positive feeding or contrary feeding according to described regulating quantity, the generation that is just reaching contrary feeding adjustment disk 35,60 is described.This feed regulation 30 has positive feed regulation 31 that produces the forward stitch amount and the contrary feed regulation 32 that produces contrary (bearing) cloth feed amount.At this, at first align feed regulation 31 and describe.

As Fig. 2～shown in Figure 6, among the screw Fa of the fore-and-aft direction that on the machine frame F of post portion 2, forms, screw togather the shaft component 35a of positive feeding adjustment disk 35 rotationally.That is, by operator's rotating operation, positive feeding adjustment disk 35 is by shaft component 35a advance and retreat mobile (moving forward and backward).Shaft component 35a be equipped with positive feed regulator 36 near rear side, this positive feed regulator 36 is supported on the machine frame F rotationally by the pivot fulcrum 37 of left and right directions.

In the rearward end of this positive feed regulator 36, be connected by the upper end of pivot backing pin 38 with the 1st connecting rod 39 of above-below direction.2nd connecting rod 40 of the 1st connecting rod 39 by being connected with the contrary feed regulation 32 of aftermentioned is connected with the feeding adjusting rod 41 of the right part that is fixed in feeding regulating shaft 42.The actuating strut 43 that is fixed in the left part of feeding regulating shaft 42 is connected with the rearward end that connecting rod 44 is regulated in feeding, and the leading section that connecting rod 44 is regulated in feeding is connected with the right part of feeding switch 20.

Thus, owing to utilize positive feed regulation 31 or contrary feed regulation 32, by the 1st, the 2nd connecting rod 39,40 and feeding adjusting rod 41 feeding regulating shaft 42 is rotated, therefore, the rotational angle around trunnion axis that feeding switch 20 is changed in the swing of regulating connecting rod 44 by feeding can carry out the adjusting of cloth feed amount.

At the leading section of positive feed regulator 36, be formed with the cam part 36a of spherical leading section of the shaft component 35a of the positive feeding adjustment disk 35 of backstop.On this cam part 36a, as shown in Figure 7, be formed with the 1st feeding adjustment cam face 36b, with the 2nd continuous feeding adjustment cam face 36c of the 1st feeding adjustment cam face 36b.At this, with respect to the face S of the shaft component 35a quadrature of positive feeding adjustment disk 35, the angle of inclination beta of the 2nd feeding adjustment cam face 36c is set for littler than the inclined angle alpha of the 1st feeding adjustment cam face 36b.

The 1st feeding adjustment cam face 36b of ordering from the u point to v on the cam part 36a forms plane with the corresponding length L 1 of initial rotation 1 circle part with positive feeding adjustment disk 35.And, the 2nd feeding adjustment cam face 36c of ordering on the cam part 36a from the v point to w, with the feeding adjustment disk after once rotate the corresponding length L of 1 circle part 2 and form plane.

The limit rotation mechanism 50 near the left side to the shaft component 35a that is located at positive feeding adjustment disk 35 describes below.As Fig. 4, shown in Figure 6, be construed as limiting on the circular restriction cancellation plate 51a that removes member 51 (this member be equivalent to engage with the limit rotation member fastened component), its top ends (leading section) is connected with thin pilot pin 52 and thick limit rotation pin 53 (this member is equivalent to the limit rotation member).At this, restriction cancellation member 51 is made of releasing operating portion 51b of the roughly left-half of restriction cancellation plate 51a, restriction cancellation plate 51a etc.In addition, the acute angle-shaped leading section 53a of limit rotation pin 53 inserts to lead in restriction cancellation plate 51 and forwards stretches out.

Be formed with the bullport Fb and the pin-and-hole Fc of fore-and-aft direction on machine frame F, pilot pin 52 embeds the bullport Fb from the place ahead, simultaneously with among limit rotation pin 53 and the compression helical spring 54 embedding pin-and-hole Fc to its elastic force-applying.Thus, limit rotation pin 53 can be advanced and retreat along fore-and-aft direction in machine frame F.At this, portion forms the annular wall 35c of portion near portion and periphery near the rear end of positive feeding adjustment disk 35, on the 35c of this annular wall portion, a plurality of point-like recesses (not shown) is separated small predetermined distance form circle.

Thus, will by compression helical spring 54 forwards the acute angle-shaped leading section 53a of the limit rotation pin 53 of the application of force engage with certain 1 in pushing shape ground and these a plurality of point-like recesses, carry out on the manually operated operating position thereby positive feeding adjustment disk 35 can be remained on.Like this, limit rotation pin 53 is urged from the rear all the time by this acute angle-shaped leading section 53a, conflicts with the 35c of annular wall portion.Thus, by operator's rotating operation, move synchronously with the advance and retreat of positive feeding adjustment disk 35, limit rotation pin 53 is guided by pilot pin 52 on one side by restriction cancellation plate 51a, moves Yi Bian carry out the advance and retreat of fore-and-aft direction.

And, between the rear end of restriction cancellation plate 51a and the operating portion 35b of positive feeding adjustment disk 35, be provided with the gap d that engages of regulation all the time.The part of the 35c of annular wall portion of positive feeding adjustment disk 35 is integrally formed with the block holding section 35d that rearward protrudes.The bulge size t that rearward protrude the rear end from operating portion 35b among the 35d of this holding section is less than the engaging gap d.

Thus, when making positive feeding adjustment disk 35 rotations 1 circle, positive feeding adjustment disk 35 is counterclockwise being turned on the initial position that rotates 1 circle part approximately from the turned position of cloth feed amount for " 0 ", because of the acute angle-shaped leading section 53a conflict of holding section 35d and limit rotation pin 53, so can limit the rotation of positive feeding adjustment disk 35.

But, even the occasion that is restricted at the anticlockwise rotating operation of positive feeding adjustment disk 35, shown in the double dot dash line among Fig. 9, the finger that also can be used as the dealer rearward pushes the left part of restriction cancellation plate 51a, and limit rotation pin 53 is rearward kept out of the way more than the bulge size t simultaneously.Thus, the acute angle-shaped leading section 53a that holding section 35d becomes not with limit rotation pin 53 disturbs, and limit rotation is disengaged, and positive feeding adjustment disk 35 can carry out once rotating after anticlockwise the rotation of 1 circle part.

Like this, not only can utilize the initial rotation 1 circle part of positive feeding adjustment disk 35, and once rotate 1 after can utilizing and enclose rotation partly, along with shaft component 35a from the 1st feeding adjustment cam face 36b to the moving of the 2nd feeding adjustment cam face 36c, also can change the rotational angle of positive feed regulator 36 at any time.That is, according to the rotational angle of the positive feed regulator 36 corresponding with the regulating quantity of positive feeding adjustment disk 35, as previously mentioned, what can regulate (change) feeding switch 20 by feeding regulating shaft 42 is the forward stitch amount around the rotational angle of trunnion axis.

As Fig. 1, shown in Figure 4, be on the white display surface 35e in the front of the operating portion 35b of positive feeding adjustment disk 35, use black numbers and thick line mark putting down in writing the forward stitch scale " 0～2.5 " of initial rotation 1 circle part at its outer circumferential side with the interval of 0.25mm.And after using hollow numeral and thick line mark putting down in writing with the interval of 0.5mm, all sides once rotate the forward stitch scale " 2.5～5 " of 1 circle part within it.This occasion, make with operating portion 35b be set as the involutory recess Fd of roundlet shape near the corresponding machine frame F of upside fovea superior, consistent with the numeral and the thick line mark of the forward stitch amount of setting.

Below contrary feed regulation 32 is described.As Fig. 2, shown in Figure 3, in the screw (not shown) of the fore-and-aft direction that on the machine frame F of post portion 2, forms, screw togather the shaft component 60a of contrary feeding adjustment disk 60 rotationally.That is, by operator's rotating operation, contrary feeding adjustment disk 60 is by shaft component 60a advance and retreat mobile (moving forward and backward).Being equipped with against feed regulator 61 near rear side of shaft component 60a, this contrary feed regulator 61 is supported on the machine frame F rotationally by the contrary feed spool 62 of left and right directions.

On contrary feed spool 62, be connected with the base end part of connecting rod 63 and back stitching handle 64.Connecting rod 63 is connected with the bottom of the 1st connecting rod 39, is connecting the upper end of the 2nd connecting rod 40 simultaneously.Leading section at contrary feed regulator 61 is formed with the roughly cam surface 61a of vertical direction, and the spherical leading section of the shaft component 60a of contrary feeding adjustment disk 60 is conflicted from the place ahead and this cam surface 61a.

Thus, by clockwise direction or the contrary feeding adjustment disk 60 of counter clockwise direction rotating operation, thereby move the rotational angle that can change contrary feed regulator 61 at any time by the advance and retreat of shaft component 60a.Promptly, according to the rotational angle of the contrary feed regulator 61 corresponding, regulate the promptly contrary cloth feed amount of the rotational angle around trunnion axis of (change) feeding switch 20 by contrary feed spool 62, connecting rod the 63, the 2nd connecting rod 40, feeding adjusting rod 41 and feeding regulating shaft 42 with the regulating quantity of contrary feeding adjustment disk 60.

But, when the counter clockwise direction rotating operation by positive feeding adjustment disk 35 amplifies the forward stitch amount, positive feed regulator 36 sees it is clockwise direction from the side, because of the 1st connecting rod 39 moves downwards, so contrary feed spool 62 and connecting rod 63 see it is clockwise direction from the side.That is, the shaft component 60a from contrary feeding adjustment disk 60 separates because of contrary feed regulator 61, so can with under the situation about disturbing against feed regulator 61 not produce the forward stitch amount.

On the other hand, when the counter clockwise direction rotating operation by contrary feeding adjustment disk 60 amplifies contrary cloth feed amount, contrary feed regulator 61 sees it is counterclockwise from the side, because of the 1st connecting rod 39 is moved upward, is counterclockwise so positive feed regulator 36 is seen from the side.That is, the shaft component 35a from positive feeding adjustment disk 35 separates because of positive feed regulator 36, thus can be under situation about not disturbing with positive feed regulator 36 the contrary cloth feed amount of generation.

As Fig. 1, shown in Figure 4, be on the white display surface 60c in the front of the operating portion 60b of contrary feeding adjustment disk 60, putting down in writing contrary work feed scale " 0～-5 " with black numbers.This occasion, make with operating portion 60b be set as the involutory recess Fe of roundlet shape near the corresponding machine frame F of upside fovea superior, digital consistent with the contrary cloth feed amount of setting.

The following describes the positive feed regulation 31 of formation like this and the effect and the effect of limit rotation mechanism 50.

Shown in Fig. 5 A, when the operating portion 35b of the positive feeding adjustment disk 35 of manual operation setting forward stitch amount was " 0 ", shown in Fig. 5 B, the u point of the leading section of shaft component 35a and the 1st feeding adjustment cam face 36b inboard was conflicted.Thus, as previously mentioned, because of positive feed regulator 36 becomes specific posture, the rotational angle around trunnion axis of feeding switch 20 becomes specific angle, so swinging axle 16 is not swung, the forward stitch amount is " 0 ".

Shown in Fig. 8 A, the operating portion 35b of the positive feeding adjustment disk 35 of manual operation, make the forward stitch amount when " 0 " changes to " 2.5 " in the initial rotation approximately of rotating operation 1 circle part, shown in Fig. 8 B, the leading section of shaft component 35a moves to the v point of the 1st feeding adjustment cam face 36b front side along the 1st feeding adjustment cam face 36b.Thus, as previously mentioned,, so as shown in figure 11, the forward stitch amount can be adjusted to maximum " about 2.5mm " because of positive feed regulator 36 clockwise directions rotate.

Like this, when positive feeding adjustment disk 35 having been rotated initial rotation approximately 1 circle part, utilize limit rotation mechanism 50 that the leading section 53a of holding section 35d and limit rotation pin 53 is conflicted, so can limit the rotation of positive feeding adjustment disk 35.Thus, can in the scope of " 0～about 2.5mm ", carry out the fine setting of forward stitch amount, can stop and set big forward stitch amount unintentionally.

When Zigzag sewing machine M is used as sewing machine for covering chain stitch (vertical masonry joint Sewing machines), when needing the big forward stitch amount of 3～4mm, shown in the double dot dash line among Fig. 9, operator's only with hand refers to that the releasing operating portion 51b with restriction cancellation plate 51a rearward pushes and removes operation, limit rotation pin 53 is rearward kept out of the way simultaneously, therefore, the acute angle-shaped leading section 53a of limit rotation pin 53 does not disturb with holding section 35d, positive feeding adjustment disk 35 further once can be rotated the counter clockwise direction of 1 circle part backwards and carry out rotating operation.

This occasion, shown in Figure 10 A, once the 1 circle part of rotation approximately makes the forward stitch amount when " 2.5 " change to " 5 " after with the operating portion 35b rotating operation of positive feeding adjustment disk 35, shown in Figure 10 B, the w point of side in front of the leading section of shaft component 35a moves to along the 2nd feeding adjustment cam face 36c.Thus, as previously mentioned,, so as shown in figure 11, the forward stitch amount can be adjusted to maximum " about 5mm " because of positive feed regulator 36 further clockwise directions rotate.

Like this, after positive feeding adjustment disk 35 has been rotated, during once rotation approximately 1 circle part, utilize limit rotation mechanism 50 to make the acute angle-shaped leading section 53a conflict of holding section 35d and limit rotation pin 53, promptly also can limit the rotation of positive feeding adjustment disk 35 in this occasion.Thus, can in the scope of " 2.5～5mm ", carry out the fine setting of forward stitch amount, can stop and set little forward stitch amount unintentionally.

As mentioned above, in the present embodiment, positive feeding adjustment disk 35 has the shaft component 35a that advances and retreat mobile by its rotating operation, and positive feed regulator 36 has the cam part 36a that the shaft component 35a with positive feeding adjustment disk 35 conflicts.And, on this cam part 36a, form have with the 1st feeding adjustment cam face 36b of the corresponding length L 1 of initial rotation 1 circle part of positive feeding adjustment disk 35 and have with feeding adjustment disk 35 just after once rotate 1 and enclose the 2nd feeding adjustment cam face 36c of the corresponding length L 2 of part.

Thus, can utilize initial rotation 1 circle of positive feeding adjustment disk 35, in the scope of " 0～about 2.5mm ", produce suitable cloth feed amount.And, can utilize positive feeding adjustment disk 35 after once rotate 1 circle, the big suitable forward stitch amount of generation the scope of " about 2.5～5mm " in.Like this, the cloth feed amount among the separate unit Zigzag sewing machine M can further improve versatility and adaptability.

And, in the present embodiment, because the 1st feeding adjustment cam face 36b and the 2nd feeding adjustment cam face 36c have the corresponding length of rotation 1 circle part with positive feeding adjustment disk 35 separately, therefore, no matter be in initial rotation 1 circle of positive feeding adjustment disk 35 or after once rotate in 1 circle, all can similarly carry out the fine setting of forward stitch amount.

In addition, with respect to the face S of the shaft component 35a quadrature of positive feeding adjustment disk 35, the angle of inclination beta of the 2nd feeding adjustment cam face 36c is set for littler than the inclined angle alpha of the 1st feeding adjustment cam face 36b.Thus, even the rotating operation by positive feeding adjustment disk 35 moves this shaft component 35a advance and retreat, also can regulate the rotational angle of positive feed regulator 36, the work feed variable quantity that once rotates 1 circle part behind the work feed variable quantity of the initial rotation 1 circle part of positive feeding adjustment disk 35 and the positive feeding adjustment disk 35 is set for about equally.

In addition, positive feeding adjustment disk 35 is being rotated on the initial position that rotates 1 circle part approximately, be provided with the limit rotation pin 53 that the positive feeding adjustment disk 35 of restriction rotates, therefore, can limit the initial slewing area of rotating 1 circle part approximately of positive feeding adjustment disk 35, once rotate the slewing area of 1 circle part after can forcibly preventing to enter unintentionally.

And, owing to be provided with and remove the restriction cancellation member 51 that limit rotation pin 53 aligns the limit rotation of feeding adjustment disk 35, therefore, as required, only need rearward remove performance constraint and remove the limit rotation that plate 51a just can remove limit rotation pin 53, thus, can simply switch to positive feeding adjustment disk 35 after once rotate the slewing area of 1 circle part.

In addition, limit rotation pin 53 is compressed the elastic force-applying of helical spring 54, so that it can advance and retreat in machine frame F, and, its acute angle-shaped leading section 53a can be conflicted with the holding section 35d of positive feeding adjustment disk 35.And restriction cancellation member 51 has: the restriction cancellation plate 51a that engages with limit rotation pin 53; Carry out to remove the releasing operating portion 51b of limit rotation pin 53 and the releasing that the engages operation of holding section 35d by this restriction cancellation plate 51a.Thus, 53 of limit rotation pins that are subjected to elastic force-applying need towards and its application of force side remove the releasing operation of operating portion 51b in the opposite direction, just can be easily with the releasing that engages of the holding section 35d of limit rotation pin 53 and feeding adjustment disk 35 just.

And, by limit rotation pin 53 is arranged in the machine frame F, thus can realize being provided with these limit rotation pins 53 and restriction cancellation member 51 limit rotation mechanism 50 miniaturization and improve its operability.

In addition, integrally formed because of removing operating portion 51b and restriction cancellation plate 51a, thus the part number can be reduced, thus, can not only make the miniaturization of the limit rotation mechanism 50 that is provided with limit rotation pin 53 and restriction cancellation member 51, and can improve assembleability and realize cost degradation.

In addition, because on the white display surface 35e of positive feeding adjustment disk 35, putting down in writing the work feed scale " 0～2.5 " of initial rotation 1 circle part at its outer circumferential side, after carrying, all sidelights simultaneously once rotate the work feed scale " 2.5～5 " of 1 circle part within it, therefore, can easily see cloth feed amount in each slewing area of clear and upright feeding adjustment disk 35 by scale.

And, make the work feed scale of initial rotation 1 circle part show form with after once to rotate the work feed scale demonstration form of 1 circle part different, specifically be to utilize black numbers different respectively with hollow numeral, thus, by its show form can make the operator can not make mistakes the correct identification rotation 1 circle part in ground the work feed scale and after once rotate the work feed scale of 1 circle part.

The following describes the variation of the foregoing description being carried out local deformation.

The 1st variation as shown in figure 12, also can adopt following structure: be provided with the 50A of limit rotation mechanism that locality has changed limit rotation mechanism 50, operating knob 73a is removed in operation retreats limit rotation pin 71, removes the limit rotation of limit rotation pin 71 thus.

That is, be formed with on the machine frame F fore-and-aft direction about 1 couple pin-and-hole Ff, Fg and the recess Fh that overlooks to see in the form of a substantially rectangular.This recess Fh and pin-and-hole Ff, Fg are blocked by cover plate 70, form the state that front end is capped, and this cover plate 70 is fixed on the machine frame F by a plurality of Screws (not shown).On cover plate 70, be formed with 1 couple of inserting hole 70a, 70b respectively.

In the pin-and-hole Fg on right side, embed 71 (being equivalent to the limit rotation member) of limit rotation pin and, be supported slidably before and after the inserting hole 70b of limit rotation pin 71 by pin-and-hole Fg and right side the compression helical spring 72 of its elastic force-applying.The restriction cancellation axle 73 that sets along fore-and-aft direction in the inside of recess Fh, and supported, the releasing operating knob 73a (this member is equivalent to remove operating portion) of leading section inserts and leads in the inserting hole 70a in left side simultaneously in the pin-and-hole Ff on the left of rearward end is passed through to embed.Thus, restriction cancellation axle 73 front and back are supported slidably.

It is integrally formed that the pivot of the short transverse center section part of the left part of cover plate 70 and the level of rearward extending props up wall 70c, prop up on the wall 70c at this pivot, swing arm 74 (this member is equivalent to fastened component) but the left part propped up by pivot by Screw 75 horizontal hunting ground.Swing arm 74 at its position near base end part, is applied in and forms the roughly rectangular through hole in horizontal cross section (not shown) on the restriction cancellation axle 73, in its right part, engages with formed connecting hole (not shown) on the limit rotation pin 71.

Swing arm 74 is connected with restriction cancellation axle 73 by Screw 76 on the perforation position of restriction cancellation axle 73, with restriction cancellation axle 73 towards front and back to mobilely synchronously carry out swing, meanwhile limit rotation pin 71 also carries out fore-and-aft direction and moves.At this, restriction cancellation member 77 is made of releasing operating knob 73a of swing arm 74 and restriction cancellation axle 73 etc.

The fore-end 71a and the previous embodiments of limit rotation pin 71 form acute angle-shaped, engage with certain 1 in a plurality of point-like recesses of the formed annular wall 35c of portion on pushing shape ground and the feeding adjustment disk 35 just, thereby can remain on the operating position of the positive feeding adjustment disk 35 of manual operation.

Because of the 50A of limit rotation mechanism has adopted structure like this, so when positive feeding adjustment disk 35 had rotated initial rotation approximately 1 circle part, the leading section 71a of holding section 35d and limit rotation pin 71 conflicted, and can limit the rotation of positive feeding adjustment disk 35.Thus, can in the scope of " 0～about 2.5mm ", carry out the fine setting of forward stitch amount, can stop and set big positive feeding amount unintentionally.

On the other hand, when needing the big forward stitch amount of 3～4mm, shown in the double dot dash line among Figure 12, the operator will remove operating knob 73a with finger and rearward push and remove operation.This occasion, far from positive feeding adjustment disk 35 because of removing operating knob 73a in the left side, so convenient releasing operating knob 73a is removed operation.Consequently, swing arm 74 is swung towards the rear, and limit rotation pin 71 is also rearward kept out of the way simultaneously, therefore, the leading section 71a of limit rotation pin 71 does not disturb with holding section 35d, positive feeding adjustment disk 35 further once can be rotated the counter clockwise direction of 1 circle part backwards and carry out rotating operation.

The following describes the 2nd variation shown in Figure 13.As shown in figure 13, the positive feed regulator 36A of positive feed regulator 36 that has been provided with partial alteration forms the corresponding length L 3 of rotation 1 circle part that has with positive feeding adjustment disk 35 with the cam part 36a of this positive feed regulator 36A.And, on described cam part 36a, the 2nd feeding adjustment cam face 36f that forms the 1st feeding adjustment cam face 36e of the about 240 ° of corresponding length in rotation 1 circle have with positive feeding adjustment disk 35 and have the about 120 ° of corresponding length in enclosing with the rotation 1 of positive feeding adjustment disk 35.With respect to the face S of the shaft component 35a quadrature of positive feeding adjustment disk 35, the angle of inclination beta of the 2nd feeding adjustment cam face 36f is set at littler than the inclined angle alpha of the 1st feeding adjustment cam face 36e.

Adopt this structure, during making positive feeding adjustment disk 35 rotations 1 circle, can utilize the 1st feeding adjustment cam face 36e to produce little cloth feed amount " 0～about 2.5mm ", and, can utilize the 2nd feeding adjustment cam face 36f continuous to produce bigger cloth feed amount " about 2.5～5mm " with it.Thus, for the cloth feed amount of separate unit Zigzag sewing machine M, can improve versatility and adaptability greatly.

In addition, in the foregoing description and above-mentioned variation, the 1st feeding adjustment cam face 36b, 36e and the 2nd feeding adjustment cam face 36c, 36f form plane respectively, for example form bending but also can replace it.And, also can continuous and level and smooth shape ground formation the 1st feeding adjustment cam face 36b, 36e and the 2nd feeding adjustment cam face 36c, 36f.

In addition, also can on the cam part 36a of positive feed regulator 36, form continuously respectively to have and enclose the 1st～the 3rd feeding adjustment cam face of the corresponding length of part with the rotation 1 of positive feeding adjustment disk 35, adopt this structure, can enlarge the work feed regulating quantity of Zigzag sewing machine M significantly.

The present invention is not limited to the embodiment and the variation of above explanation, implements so long as the insider can add various changes to previous embodiment without departing from the spirit and scope of the present invention, and the present invention also comprises these change forms.

Claims (12)

1, a kind of feed regulation of Sewing machines comprises: be located at the feeding adjustment disk on the machine frame of Sewing machines; Regulate the feed regulator of rotational angle according to the regulating quantity of this feeding adjustment disk; Produce the feeding switch of the cloth feed amount of feeding tooth according to the rotational angle of this feed regulator, it is characterized in that,

Described feeding adjustment disk has by its rotating operation mobile shaft component of advancing and retreat,

Described feed regulator has the cam part of conflicting with the shaft component of described feeding adjustment disk,

On described cam part, form have with the 1st feeding adjustment cam face of the corresponding length of initial rotation 1 circle part of described feeding adjustment disk and have with described feeding adjustment disk after once rotate the 2nd feeding adjustment cam face of the corresponding length of 1 circle part.

2, the feed regulation of Sewing machines as claimed in claim 1, it is characterized in that, with respect to the face of the shaft component quadrature of described feeding adjustment disk, the inclination angle of described the 2nd feeding adjustment cam face is set for littler than the inclination angle of described the 1st feeding adjustment cam face.

3, the feed regulation of Sewing machines as claimed in claim 1 is characterized in that, is provided with the limit rotation member that has rotated the rotation of the described feeding adjustment disk of restriction on the initial position that rotates 1 circle part approximately at described feeding adjustment disk.

4, the feed regulation of Sewing machines as claimed in claim 2 is characterized in that, is provided with the limit rotation member that has rotated the rotation of the described feeding adjustment disk of restriction on the initial position that rotates 1 circle part approximately at described feeding adjustment disk.

5, the feed regulation of Sewing machines as claimed in claim 3 is characterized in that, is provided with to remove the restriction cancellation member of described limit rotation member to the limit rotation of described feeding adjustment disk.

6, the feed regulation of Sewing machines as claimed in claim 4 is characterized in that, is provided with to remove the restriction cancellation member of described limit rotation member to the limit rotation of described feeding adjustment disk.

7, the feed regulation of Sewing machines as claimed in claim 5, it is characterized in that described limit rotation member can be arranged in the described machine frame with advancing and retreat, and, its leading section is subjected to the elastic force-applying of the force application component that can conflict with the holding section of described feeding adjustment disk

Described restriction cancellation member has: the fastened component that engages with described limit rotation member; Carry out to remove the releasing operating portion of described limit rotation mechanism and the releasing that the engages operation of described holding section by this fastened component.

8, the feed regulation of Sewing machines as claimed in claim 6, it is characterized in that described limit rotation member can be arranged in the described machine frame with advancing and retreat, and, its leading section is subjected to the elastic force-applying of the force application component that can conflict with the holding section of described feeding adjustment disk

Described restriction cancellation member has: the fastened component that engages with described limit rotation member; Carry out to remove the releasing operating portion of described limit rotation mechanism and the releasing that the engages operation of described holding section by this fastened component.

9, the feed regulation of Sewing machines as claimed in claim 7 is characterized in that, described releasing operating portion and described fastened component is integrally formed.

10, the feed regulation of Sewing machines as claimed in claim 8 is characterized in that, described releasing operating portion and described fastened component is integrally formed.

11, as the feed regulation of each described Sewing machines in the claim 1～10, it is characterized in that, the work feed scale that is marked with initial rotation 1 circle part on the display surface of described feeding adjustment disk side by side and after once rotate the work feed scale of 1 circle part.

12, the feed regulation of Sewing machines as claimed in claim 11 is characterized in that, the work feed scale of described initial rotation 1 circle part with described after once to rotate the demonstration form of 1 circle work feed scale partly different.

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