CN103215756A

CN103215756A - Cloth feed adjusting device of sewing machine

Info

Publication number: CN103215756A
Application number: CN2013100200018A
Authority: CN
Inventors: 三浦聪
Original assignee: Juki Corp
Current assignee: Juki Corp
Priority date: 2012-01-18
Filing date: 2013-01-18
Publication date: 2013-07-24
Anticipated expiration: 2033-01-18
Also published as: TW201341620A; KR20130085003A; JP5940307B2; EP2617884B1; TWI563139B; EP2617884A1; JP2013146326A; KR101912354B1

Abstract

A cloth feed adjusting device of a sewing machine includes a turning unit (86) configured to change a stitch pitch, a cam member (78, 79) configured to change a rotation angle of the turning unit, first and second adjusting members (76, 77) configured to set a rotation angle of the cam member, and a pitch switching actuator (80) configured to switch a contacting state between a cam portion (781,791) and contact portions (731, 741) of the turning unit. The cam portion is formed such that a forward feed adjusting portion (785, 795) for adjusting a forward feeding pitch and a backward feed adjusting portion (786, 796) for adjusting a backward feeding pitch face each other and have a border at an intermediate position (784, 794) at which a stitch pitch becomes 0. The cloth feed adjusting device includes a feed direction switching actuator (81) configured to moves the contact portion between the forward feed adjusting portion and the backward feed adjusting portion to switch a stitch direction, and a control unit (90) configured to drive, at the time of starting the operation of the pitch switching actuator, the feed direction switching actuator in a range in which the stitch direction is not switched.

Description

The cloth feeding adjusting device of Sewing machines

Technical field

The present invention relates to a kind of two cloth feeding adjusting devices of regulating the Sewing machines of parts that have.

Background technology

The cloth feed apparatus of common Sewing machines has the feeding adjusting body that can regulate its action transmission capacity from cloth feeding drive source to path that the feeding tooth transmits feed motion midway.Change angle by this feeding adjusting body is rotated, make spacing (amount of feeding) thereby can regulate.This feeding adjusting body has following structure, promptly, making spacing when neutral angle is 0, if rotate to certain orientation from neutral angle, then the spacing of making of forward direction of feed increases since 0, if rotate round about from middle angle, then the spacing of making of reverse direction of feed increases since 0.

In addition, known a kind of cloth feeding adjusting mechanism, it is for to make purposes corresponding and apply in a flexible way and make spacing, makes spacing thereby constitute two of can switch independent setting.For example, cloth feeding adjusting mechanism constitutes, have two and regulate parts, they have set different the make spacings corresponding with the different angles of above-mentioned feeding adjusting body in advance respectively, when spacing is made in switching, can be from making spacing to switching by the spacing of making of another feeding adjusting component settings by a feeding adjusting component settings.

For example, Figure 16 shows the cloth feeding adjusting mechanism 100 that is put down in writing at TOHKEMY 2007-202667 communique.Cloth feeding adjusting mechanism 100 has: first regulates parts 101 and second regulates parts 102, and it carries out forward/backward by the dial operation and moves; First cam part 103, it has the lower end that rotatably is supported on by back shaft 109 on the Sewing machines framework, and bear clockwise turning effort power in Figure 16 by helical spring 107, pushed and rotate by the first leading section 101A that regulates parts 101; Second cam part 104, it has the pars intermedia that rotatably is supported on by back shaft 110 on the Sewing machines framework, is pushed and rotates by the second leading section 102A that regulates parts 102; Feeding adjusting wrist 106, it has single butt pin 105, can with cam part 103A, the 104A butt of first cam part 103 and second cam part 104; And effect wrist 108, itself and second cam part 104 link, and the left by the effect of cylinder (not shown) in Figure 16 moves.

Feeding adjusting wrist 106 links with the feeding adjusting body (not shown) of feed arrangement, if this feeding adjusting wrist 106 rotates, then the feeding adjusting body also rotates in linkage.

Carry out butt by the butt pin 105 of feeding adjusting wrist 106 and cam part 103A, the 104A of first and second cam part 103,104, thereby the angle via feeding adjusting wrist 106 definite feeding adjusting bodies is adjusted to the make spacing corresponding with the butt position with making spacing.

Cam part 103A, the 104A of each cam part 103,104 all forms the roughly V word shape that has rake in the both sides of recess, and this recess becomes the centre position that makes the feeding adjusting body be in neutral angle.Each cam part 103A, 104A form, and an one rake is more away from the centre position, the forward direction of feed to make spacing big more, another rake of each cam part is more away from the centre position, reverse direction of feed to make spacing big more.By making butt pin 105 along moving across the relative both sides rake in centre position, thereby the feeding adjusting body rotates to positive and negative all directions respectively, thereby regulates the setting of making spacing.

Usually as shown in figure 16, first cam part 103 bears to clockwise turning effort power by helical spring 107, and with the first adjusting parts, 101 butts, and second cam part 104 is not to keep out of the way with second mode of regulating parts 102 butts.Under this state, the cam part 104A of second cam part 104 is arranged in the rear (Figure 16's is right-hand) of the cam part 103A of first cam part 103, carry out the cloth feeding away from the cam part 103A of butt pin 105, the first cam parts 103 and butt pin 105 butts to regulate the spacing of making that parts 101 set by first.

If under this state, press switching push button, the then action by cylinder, the cam part 104A of second cam part 104 is arranged in the place ahead (left of Figure 16) of the cam part 103A of first cam part 103, so that second cam part 104 and second mode of regulating parts 102 butts, second cam part 104 is rotated to the clockwise direction of Figure 16, the cam part 104A of second cam part 104 engages with butt pin 105, thereby will switch to the spacing of making of regulating parts 102 settings by second by first spacing of making of regulating parts 101 settings.And, return to described common state by being failure to actuate of cylinder.

In addition, this cloth feeding adjusting mechanism 100 is equipped with cylinder, it bears the operation towards the switching push button of reverse feeding, the rake of the forward feeding side of butt pin 105 from each cam part 103A, 104A of feeding adjusting wrist 106 is rotated to the rake of reverse feeding side, thereby switch direction of feed.

But, in the cloth feeding adjusting mechanism of existing sewing machine, with the effect of cylinder/do not act on corresponding and switch when making spacing, from butt pin 105 and a cam part 103(104) cam part 103A(104A) state of butt, until butt pin 105 and another cam part 104(103) cam part 104A(103A) engaging and make another cam part 104(103) with corresponding adjusting parts 102(101) leading section 102A(101A) engage till, make another cam part 104(103) rotate.Therefore, from the cam part engaging beginning of butt pin 105 and another cam part to another cam part with till the leading section of corresponding adjusting parts engages, butt pin 105 slides each other with this cam part.Thus, the cylinder used of change action need have with this butt pin and cam part between the corresponding output of resistance that causes of sliding friction.Even this situation produces when using other motor unit such as electromagnet replacing cylinder too.

In addition, also there is following problems, that is,, needs to adjust the maintainability variation owing to, make spacing and change because of slip makes cam part or the wearing and tearing of butt pin.

Summary of the invention

The objective of the invention is to, realize the coordinationization of making the spacing change action.

The cloth feeding adjusting device of the Sewing machines that a mode of the present invention is related has: first regulates parts, and forward/backward moves by operation for it; Second regulates parts, and forward/backward moves by operation for it; First cam part, it rotatably is supported on the Sewing machines framework by first back shaft, is regulated parts by described first and pushes and limit position of rotation; Second cam part, it rotatably is supported on the Sewing machines framework by second back shaft, can regulate parts and contact/leave with described second, is pressed when butt and limits position of rotation; The spacing switching actuator, itself and described second cam part link, and make second cam part and described second regulate parts and contact/leave; And control part, it drives described spacing switching actuator.Described first cam part has first cam part, its will make spacing be 0 centre position as the border, relatively form the first reverse feeding adjusting portion of making spacing that can set the first forward feeding adjusting portion of making spacing of forward direction of feed and can set reverse direction of feed.Described second cam part has second cam part, its will make spacing be 0 centre position as the border, relatively form the second reverse feeding adjusting portion of making spacing that can set the second forward feeding adjusting portion of making spacing of forward direction of feed and can set reverse direction of feed.Described cloth feeding adjusting device also has: rotor, its have can with the abutting part of one of them butt of described first cam part and described second cam part, can be that the center is supported on the Sewing machines framework rotatably with an axle, and corresponding with its anglec of rotation and in the scope that is fed to reverse feeding from forward change make spacing; And direction of feed switching actuator, itself so that described abutting part described first and second cam part one of them described forward feeding adjusting portion and described reverse feeding adjusting portion between the mode that moves, make described rotor rotation, thus, switch to other direction from one of them direction of forward direction of feed and reverse direction of feed making direction, when control part begins in the action of described spacing switching actuator, described direction of feed switching actuator is driven can not switching in the scope of making direction.

The cloth feeding adjusting device of the Sewing machines that another mode of the present invention is related has: first regulates parts, and forward/backward moves by operation for it; Second regulates parts, and forward/backward moves by operation for it; Cam part, it rotatably is supported on by back shaft on the Sewing machines framework, is regulated parts by described first and pushes and limit position of rotation; The spacing switching actuator, itself and described cam part link, and make described cam part and described second regulate parts and contact/leave; And control part, it drives described spacing switching actuator.Described cam part has cam part, its will make spacing be 0 centre position as the border, relatively form and can regulate the forward feeding adjusting portion of making spacing of forward feeding and the reverse feeding adjusting portion of making spacing that can regulate reverse feeding by the butt of described abutting part by the butt of described abutting part.Described cloth feeding adjusting device also has: rotor, its have can with the abutting part of described cam part butt, can be that the center is supported on the Sewing machines framework rotatably with an axle, and corresponding with its anglec of rotation and in the scope that is fed to reverse feeding from forward change make spacing; And direction of feed switching actuator, it is so that the mode that described abutting part moves between the described forward feeding adjusting portion of described cam part and described reverse feeding adjusting portion, make described rotor rotation, thus, switch to other direction from one of them direction of forward direction of feed and reverse direction of feed making direction, when control part begins in the action of described spacing switching actuator, described direction of feed switching actuator is driven can not switching in the scope of making direction.

Described cloth feeding adjusting device also can also have the detecting unit that the compulsory exercise amount to described direction of feed switching actuator detects, described control part till detecting described compulsory exercise amount until described detecting unit, the action of the described direction of feed switching actuator the when action of carrying out described spacing switching actuator begins.

Described cloth feeding adjusting device also can also have the timing unit that carries out timing actuation time to described direction of feed switching actuator, described control part until described timing unit timing till the specified action time, the action of the described direction of feed switching actuator the when action of carrying out described spacing switching actuator begins.

The effect of invention

Set two differences using first and second cam parts and make under the situation of structure of spacing, at first, operation first and second is regulated parts and is determined the forward/backward position respectively.At this moment, first cam part and first is regulated the parts butt, and second cam part is regulated parts away from second.

Then, regulating under the situation of making spacing of component settings from having selected to switch to by second by first state of making spacing of regulating component settings, with the spacing switching actuator side by side, the direction of feed switching actuator is driven can not switching in the scope of making direction.Its result, abutting part moves to another from of feeding adjusting portion of forward feeding adjusting portion/reverse.During this period, because the spacing switching actuator is carried out the change action of cam part, so can avoid or reduce sliding-contact between the cam part of the abutting part and second cam part.Thus, sliding friction reduces, even the lower small-sized spacing switching actuator of output also can easily be made the spacing change action.

In addition, by reducing sliding friction, can make the spacing change action more quickly.

In addition,, can reduce the wearing and tearing of abutting part and cam part, realize the raising of durability and maintainability by reducing sliding friction.

Make under the situation of structure of spacing using a cam part to set two differences, at first, parts are regulated in operation first and second, determine forward/backward position separately.At this moment, cam part and first is regulated the parts butt, regulates parts away from second.

Then, regulating under the situation of making spacing of component settings from having selected to switch to by second by first state of making spacing of regulating component settings, with the spacing switching actuator side by side, the direction of feed switching actuator is driven can not switching in the scope of making direction.Its result, in the cam part of cam part, abutting part moves to another from forward feeding adjusting portion and reverse feeding adjusting portion one.And, during this period, rotate the butt position of switching between abutting part and the cam part owing to the spacing switching actuator makes cam part, so can avoid or reduce the sliding-contact between abutting part and the cam part.Thus, sliding friction reduces, and the load of spacing switching actuator reduces, thereby can use the lower small-sized spacing switching actuator of output.

In addition, constituting under the situation with detecting unit that the compulsory exercise amount to the direction of feed switching actuator detects, by utilizing this detecting unit to detect the suitable actuating quantity of spacing switching actuator, can move more accurately, can realize the raising of mechanism reliability.

In addition, constituting under the situation with the timing unit that the direction of feed switching actuator is carried out timing actuation time, by utilizing this timing unit to detect the suitable action timing of spacing switching actuator, can move more accurately, can realize the raising of mechanism reliability.

Description of drawings

Fig. 1 is the vertical view of the interior structure of the pedestal part of expression Sewing machines.

Fig. 2 is the V-V profile among Fig. 1.

Fig. 3 is the W-W profile among Fig. 1.

Fig. 4 is the oblique view of transmission mechanism.

Fig. 5 is the oblique view of cloth feeding adjusting mechanism.

Fig. 6 (A) observes the action specification figure that the butt pin is positioned at first cam part in centre position from Y direction, Fig. 6 (B) be from the Y direction overview setup action specification figure of first cam part of making spacing of forward direction of feed.

Fig. 7 (A) is the action specification figure of second cam part after keeping out of the way from the Y direction observation from the second adjusting parts, and Fig. 7 (B) observes the action specification figure that is connected to second cam part on the second adjusting parts from Y direction.

Fig. 8 (A) expression direction is switched the halted state of cylinder, and Fig. 8 (B) expression direction is switched the operating state of cylinder under small actuating quantity.

Fig. 9 is the block diagram of the control system of Sewing machines.

Figure 10 is the sequential chart in the spacing switching controls.

Figure 11 is the oblique view of another example of cloth feeding adjusting mechanism.

Figure 12 is the exploded perspective view of the cloth feeding adjusting mechanism of Figure 11.

Figure 13 is the side view of cam part of the cloth feeding adjusting mechanism of Figure 11.

Figure 14 is the exploded perspective view of another example of transmission mechanism.

Figure 15 is the action specification figure of the transmission mechanism of Figure 14.

Figure 16 is the side view of existing cloth feeding adjusting mechanism.

The explanation of label

10 Sewing machiness

16 sewing machine electromotors

20 sewing machine stands (Sewing machines framework)

21 pedestal part

40 feed arrangements

43 bottom and top feed axles

46 horizontal feed axles

48,48B transmission mechanism

52, the variable portion of the 52B amount of feeding

55,55B feeding adjusting body

70,70A cloth feeding adjusting mechanism

73 first feeding adjusting wrists

73A feeding adjusting wrist

74 second feeding adjusting wrists

76, the 76A first adjustment screw parts (first regulates parts)

77, the 77A second adjustment screw parts (second regulates parts)

78 first cam parts

The 78A cam part

79 second cam parts

80, the 80A spacing is switched cylinder (spacing switching actuator)

81, the 81A direction is switched cylinder (direction of feed switching actuator)

86,86A rotor

87 position-detection sensors (detecting unit)

90 control parts

731,731A, 741 butt pins (abutting part)

781,781A, 791 cam part

784,784A, 794 centre positions

785,785A, 795 forward feeding adjusting portions

786,786A, 796 reverse feeding adjusting portions

821 marks

The specific embodiment

[first embodiment]

Below, with reference to Fig. 1～Fig. 9, describe Sewing machines in detail with the related cloth feeding adjusting device of first embodiment of the present invention.

[sewing machine stand]

Sewing machines 10 has sewing machine stand 20(Sewing machines framework), this sewing machine stand 20 has: pedestal part 21, it extends in the horizontal direction, has the seating plane of smooth elongate; Vertical body portion 22, its end from the length direction of sewing machine base portion 21 uprightly is provided with upward; And arm (not shown), its top from the upper end of vertical body portion 22 and pedestal part 21 is relatively extended along equidirectional and is provided with.

In addition, in the following description, the length direction of pedestal part 21 is made as Y direction, will be made as X-direction, will be made as Z-direction with the above-below direction of X-axis and Y direction quadrature with the horizontal direction of Y direction quadrature.

[needle plate and cloth pressing]

As shown in Figure 3, upper surface in pedestal part 21 is provided with needle plate 11, be formed with the pin hole that inserts suture needle on this needle plate 11 and make the through hole 11a of feeding tooth 41 turnover of feed arrangement 40 described later, position directly over the pin hole of needle plate 11 and through hole 11a disposes the cloth pressing 19 that is supported by cloth pressing rod 18.

[sewing machine electromotor and transmission mechanism]

As shown in Figure 2, last axle 12 in arm along the Y direction configuration, outer sewing machine electromotor 16(Fig. 9 with being arranged at arm) link and be driven in rotation.Last axle 12 is via not shown crank mechanism, applies to the needle bar that keeps suture needle in the bottom to move up and down.In addition, on last axle 12, be installed with toothed belt wheel 14 on the end of vertical body portion 22 sides, put on the shelf to be provided with at this belt wheel 14 and be with 13 synchronously, this is used for transmitting rotary driving forces to the bottom and top feed axle 43 of feed arrangement 40 with 13 synchronously.

Sewing machine electromotor 16 can link via shaft coupling and last axle 12, also can transmit moment of torsion via transmission mechanisms such as gears.

[container mechanism]

As Fig. 1～shown in Figure 3, container mechanism 30 has still axle 32, and it is along rotatably being supported in the pedestal part 21 under the state of Y direction.One end of still axle 32 keeps known full rotation still 31, and links and the servo-actuated rotation via gear mechanism 60 and bottom and top feed axle 43 in opposite ends.

[gear mechanism]

Gear mechanism 60 has: driving gear 61, and it is fixedly mounted on the bottom and top feed axle 43; And driven gear 62, it is fixedly mounted on the described still axle 32, with driving gear 61 engagements.The number of teeth of driving gear 61 is twices of the number of teeth of driven gear 62.

[feed arrangement]

As shown in Figures 2 and 3, feed arrangement 40 has: feeding platform 42, and it is at the fixing feeding tooth 41 that keeps of length direction pars intermedia; Bottom and top feed mechanism, its rotation by bottom and top feed axle 43 makes feeding platform 42 (Z-direction) reciprocating motion along the vertical direction; And horizontal feed mechanism, its rotation by bottom and top feed axle 43 makes direction of feed (directions X) reciprocating motion of feeding platform 42 at along continuous straight runs.

Bottom and top feed mechanism has: bottom and top feed axle 43, and it can be supported rotatably along Y direction in pedestal part 21; Eccentric cam 44, it is fixed on the bottom and top feed axle 43; And toggle-action lever 45, itself and eccentric cam 44 are chimeric, are the reciprocal driving force of above-below direction and transmitting to feeding platform 42 with the rotation transformation of bottom and top feed axle 43.

Bottom and top feed axle 43 along the Y direction configuration, rotatably is supported on the Sewing machines framework in pedestal part 21.One end of vertical body portion 22 sides of bottom and top feed axle 43 is fixed with toothed belt wheel 15, puts on the shelf to be provided with at this belt wheel 15 and is with 13 synchronously.The number of teeth of belt wheel 15 is identical with the number of teeth of the aforementioned upward belt wheel 14 of axle.That is belt wheel 14 and belt wheel 15 constant speed rotation.

In addition, the other end of the toggle-action lever 45 that one end and eccentric cam 44 are chimeric rotatably links with an end of feeding platform 42, when bottom and top feed axle 43 carries out full Zhou Xuanzhuan, utilize eccentric cam 44 and an end of feeding platform 42 is moved back and forth along the vertical direction with the stroke of the twice of the offset of this eccentric cam 44.

Make feeding platform 42 along the reciprocating horizontal feed of direction of feed (X-direction) mechanism, dispose abreast, rotatably be supported on the Sewing machines framework with bottom and top feed axle 43.Horizontal feed mechanism has: horizontal feed axle 46, itself and bottom and top feed axle 43 back and forth rotate in linkage; Horizontal feed arm 47, the reciprocal driving force that its reciprocal rotating drive force transformation with horizontal feed axle 46 is a direction of feed and transmitting to feeding platform 42; And transmission mechanism 48, its rotary driving force with bottom and top feed axle 43 is transformed to reciprocal rotating drive power and transmits to horizontal feed axle 46.

Utilize the action of above-mentioned bottom and top feed mechanism and horizontal feed mechanism, make the make spacing unit of feeding tooth 41, carry out the index(ing) feed action of cloth with the regulation that produces by known feed motion (elliptic motion).

Based on Fig. 1,2,4, transmission mechanism 48 is described.

Transmission mechanism 48 has: eccentric cam 49, and it is fixed on the bottom and top feed axle 43; Toggle-action lever 50, the one end is attached on the bottom and top feed axle 43 via eccentric cam 49; Swing arm 51, it is fixed on the horizontal feed axle 46; And variable 52 of the amount of feeding, it can link between the swing end with the other end of toggle-action lever 50 and swing arm 51, and the amplitude of the reciprocal rotational angle that can subtend horizontal feed axle 46 transmits is regulated.

Toggle-action lever 50 roughly disposes along the mode of X-direction with its length direction, and its base end part is rotatably chimeric with eccentric cam 49, and variable 52 of the leading section and the amount of feeding link.If bottom and top feed axle 43 carries out full Zhou Xuanzhuan, then the leading section of toggle-action lever 50 is by eccentric cam 49 and with the stroke of the offset twice of eccentric cam 49, carries out reciprocating action along the length direction of toggle-action lever 50.The reciprocating action of described toggle-action lever 50 is transmitted to horizontal feed axle 46 as reciprocal rotating drive power via variable 52 of the amount of feeding and swing arm 51.

Variable 52 of the amount of feeding as shown in Figure 4, roughly the feeding adjusting body 55 of U font utilizes the back shaft 56 parallel with horizontal feed axle 46 and can be supported rotatably with respect to sewing machine stand, at two leading sections of feeding adjusting body 55, rotatably support an end of a pair of second connecting

rod body

54,54 by a pair of

back shaft

57A, 57B.

The other end of a pair of second connecting

rod body

54,54 rotatably links and is supported on the back shaft 59, and this back shaft 59 rotatably links with the front end of toggle-action lever 50.In addition, rotatably support the lower end of a pair of first connecting rod body 53 on the back shaft 59, the upper end of a pair of first connecting rod body 53 rotatably links with the front end of swing arm 51.Back

shaft

57A, 57B, 59 are parallel with horizontal feed axle 46 respectively.

Thus, variable 52 of the amount of feeding has: a pair of first connecting rod body 53, and it links with the leading section of toggle-action lever 50 and the leading section of swing arm 51; A pair of second connecting rod body 54, its vibration-direction with the other end of toggle-action lever 50 guides to one of them direction; And feeding adjusting body 55, its channeling direction to second connecting rod body 54 is regulated.

In variable 52 of the amount of feeding, in that to make feeding adjusting body 55 rotate to first connecting rod body 53 and second connecting rod body 54 parallel and when becoming the angle position (neutral angle) of superposed state, the driving force that becomes toggle-action lever 50 can be to the state of swing arm 51 transmission, owing to do not transmit reciprocal rotational action, be 0 so make spacing to horizontal feed axle 46.

And, if this feeding adjusting body 55 is rotated to a side from neutral angle, then measure corresponding and apply reciprocally swinging and move to swing arm 51 sides with this angle of rotation, thus, can increase the spacing of making of forward direction of feed.

In addition, if make this feeding adjusting body 55 from neutral angle to counter-rotation, then corresponding and apply reciprocally swinging to swing arm 51 sides and move with angle of rotation tolerance, in the case, owing to after phasing back, transmit, so can increase the spacing of making of reverse direction of feed.

Horizontal feed axle 46 is configured in the cloth direction of feed downstream (left among Fig. 2 and Fig. 3) of still axle 32.Axis direction one end and variable 52 of the amount of feeding of vertical body portion 22 sides of horizontal feed axle 46 link, and apply reciprocal rotating drive power via variable 52 of the amount of feeding from bottom and top feed axle 43.Axis direction the other end of horizontal feed axle 46 and horizontal feed arm 47 link, the reciprocal driving force of transmitting along X-direction to feeding platform 42 via horizontal feed arm 47.

The bottom of horizontal feed arm 47 (base end part) is fixedly connected on axis direction one end of horizontal feed axle 46, and the upper end of horizontal feed arm 47 (swing end) is attached on the feeding platform 42.

Feeding platform 42 is configured in the needle plate below, and the end of cloth direction of feed (X-direction) front side links via toggle-action lever 45 and bottom and top feed axle 43, and the end of cloth direction of feed rear side links via horizontal feed arm 47 and horizontal feed axle 46.

In addition, feeding platform 42 is installed to the state of vertical body curved one-tenth of portion's 22 lateral bendings (skew) slightly with the end of feed shaft 43 sides up and down.

[cloth feeding adjusting mechanism]

Based on Fig. 5 to Fig. 7, cloth feeding adjusting mechanism 70 is described.In addition, in these accompanying drawings, omitted the detailed structure of the amount of feeding variable 52.

Cloth feeding adjusting mechanism 70 can be by cooperating feeding adjusting body 55 with two target rotational angles, and spacing is made in the setting of freely switching two different amplitudes, in addition, can also switch forward direction of feed and reverse direction of feed that the setting of aforementioned two different amplitudes is made under the spacing.

Cloth feeding adjusting mechanism 70 has: input wrist 71, and it is fixedly mounted on the feeding adjusting body 55 via back shaft 56; Regulating shaft 72, its in pedestal part 21 along rotatably supported under the state of X-direction; The first and second

feeding adjusting wrists

73,74, it is fixedly mounted on this regulating shaft 72; Connecting rod body 75, its pivoting end with the first feeding adjusting wrist 73 and input wrist 71 links; The first and second adjustment screw parts 76,77(first and second regulate examples of members), it makes the setting of spacing by manual dial operation; First and

second cam parts

78,79, it can be supported rotationally around X-axis in pedestal part 21; Spacing is switched the example of cylinder 80(spacing switching actuator), it switches the spacing of making that is set by the first and second

adjustment screw parts

76,77 respectively; Direction is switched the example of cylinder 81(direction of feed switching actuator), it switches making the positive and negative of direction; And connecting rod body 82～84 and switching wrist 85, its output of direction being switched cylinder 81 is transmitted to regulating shaft 72.

In addition, above-mentioned regulating shaft 72, first and second is regulated

wrists

73,74 and is switched wrist 85 bindings fixed to one another, works as the rotor 86 that carries out rotational action around X-axis integratedly in pedestal part 21.

Above-mentioned input wrist 71 is to the back shaft 56 along X-direction being the extension of radius centered direction.On the other hand, also to being that the radius centered direction is extended with the regulating shaft 72 along X-direction, the pivoting end of the above-mentioned input wrist 71 and the first feeding adjusting wrist 73 constitutes quadric chain by connecting rod body 75 bindings to the first feeding adjusting wrist 73 mutually.That is,, then can feeding adjusting body 55 be rotated in linkage via back shaft 56 if rotate in regulating shaft 72 sides.

In addition, feeding adjusting body 55 is applied in all the time by extension spring 58 with the back shaft among Fig. 6 56 and is the anticlockwise rotational power of middle mind-set.

The first and second

feeding adjusting wrists

73,74 all have along the butt pin 731 of the boss shape of X-direction protrusion, the example of 741(abutting part in its side surface part).Described butt pin 731,741 forms following structure, that is, respectively with cam part 781,791 butts of first and

second cam parts

78,79 described later, thereby the rotational angle around regulating shaft 72 of the first or second

feeding adjusting wrist

73,74 is fixed.

The first and second

adjustment screw parts

76,77 are by the dial portion 761,771 that manually is rotated operation and carry out the axial region 762,772 that forward/backward moves by rotary manipulation and constitute, dial portion 761,771 is arranged on the exterior lateral sides of sewing machine stand 20, and axial region 762,772 is supported on the sewing machine stand 20 by the screw structure.

In addition, for the above-mentioned first and second

adjustment screw parts

76,77, if each dial portion 761,771 is rotated operation, then axial region 762,772 moves forward and backward, its leading section is pushed first and

second cam parts

78,79 and first and

second cam parts

78,79 is rotated, thereby respectively the spacing of making of different amplitudes is set input.

In addition, become common value on forward direction of feed and reverse direction of feed from the setting amplitude of making spacing of the above-mentioned first and second

adjustment screw parts

76,77 inputs, can utilize the spacing of making that sets by the first and second

adjustment screw parts

76,77 to carry out forward feeding and reverse feeding.

In addition, the place ahead of the axial region 762,772 in the inside of sewing machine stand 20 disposes first and

second cam parts

78,79 respectively.

First cam part 78 has in its bottom along the example of turning cylinder 782(first back shaft of X-direction), at the position relative, be formed with the smooth bearing surface 783 of these axial region 762 face contacts with axial region 762.

In addition, first cam part 78 is adjacent to configuration with the first feeding adjusting wrist 73 on X-direction, and the cam part 781 that is formed at cam part 78 tops engages with the butt pin 731 of the first feeding adjusting wrist 73.

This cam part 781 as shown in Figure 6, it is otch towards the roughly V word shape of the first feeding adjusting wrist, 73 side openings, become with feeding adjusting body 55 under the state of the bottom of V word (penetralia) and butt pin 731 butts and to make the mode that spacing is 0 neutral angle, each parts is assembled.That is, the bottom of the V word in the cam part 781 is set at 0 centre position 784 for making spacing.

In addition, it is border and sloping portion respect to one another that cam part 781 forms with centre position 784, and wherein form can be to the forward feeding adjusting portion 785 that spacing is regulated of making of forward direction of feed by making butt pin 731 butts for a side (the first half among Fig. 6).In addition, form by making butt pin 731 butts can be to the reverse feeding adjusting portion 786 of making that spacing regulates of reverse direction of feed for the sloping portion of the opposite side of cam part 781 (the latter half among Fig. 6).

In addition, the butt position of the butt pin 731 relative with cam part 781 by first cam part 78 rotate moving axis 782 rotational angle and determine that the rotational angle of first cam part 78 can be set by the rotary manipulation of the first adjustment screw parts 76.

In addition, as noted above, feeding adjusting body 55 counterclockwise bears moment of torsion with the back shaft among Fig. 6 56 for middle mind-set by extension spring 58, thus, also transmits same directional moment of torsion to the first feeding adjusting wrist 73.Thus, if as Fig. 6 (A) to first cam part 78 is retreated, then butt pin 731 moves along forward feeding adjusting portion 785.Thus, with direction of feed under the situation that reverse direction of feed is switched, utilize direction to switch cylinder 81 regulating shaft 72 rotated, thereby make butt pin 731 and reverse feeding adjusting portion 786 butts.Thus, can make feeding adjusting body 55 cross neutral angle and turn to reverse feeding side, carry out making to reverse direction of feed.

And, as noted above, in this cam part 781, rotate around regulating shaft 72 by making butt pin 731, thereby this butt pin 731 is switched to state with the assigned position butt of reverse feeding adjusting portion 786 from the state with the assigned position butt of forward feeding adjusting portion 785.Be that the spacing amplitude of making spacing of making the reverse direction of feed in the state at assigned position place that spacing and butt pin 731 be connected to reverse feeding adjusting portion 786 that butt pin 731 in this case is connected to forward direction of feed in the state at assigned position place of forward feeding adjusting portion 785 equates with the shaped design of cam part 781.

Second cam part 79 roughly extends along the state of Z-direction with length direction, have along the example of turning cylinder 792(second back shaft of X-direction in the roughly centre position of length direction), turning cylinder 792 slightly above and the position relative with axial region 772, be formed with the smooth bearing surface 793 of these axial region 772 face contacts.

In addition, second cam part 79 is adjacent to configuration with the second feeding adjusting wrist 74 on X-direction, and the cam part 791 that is formed at its underpart engages with the butt pin 741 of the second feeding adjusting wrist 74.

As shown in Figure 7, the cam part 781 of this cam part 791 and first cam part 78 has centre position 794, forward feeding adjusting portion 795 and reverse feeding adjusting portion 796 in the same manner.At above-mentioned parts, because cam part 781 identical construction of the formation and first cam part 78, so omit their explanation.

In addition, the plunger binding of cylinder 80 is switched in the upper end of this second cam part 79 via connecting rod body 801 and spacing.This spacing is switched cylinder 80 and is in the state that the plunger shown in Fig. 7 (A) retreats usually, thus, the bearing surface 793 of second cam part 79 is in the state away from the leading section of the axial region 772 of the second adjustment screw parts 77, and its cam part 791 is also kept the state away from the butt pin 741 of the second feeding adjusting wrist 74.That is, under this state, select the spacing of making, and do not select the spacing of making by 77 settings of the second adjustment screw parts by 76 settings of the first adjustment screw parts.

And, to making under the situation that spacing switches of setting by the second adjustment screw parts 77, shown in Fig. 7 (B), spacing is switched the plunger advancement of cylinder 80, second cam part 79 is that clockwise direction among middle mind-set Fig. 7 rotates with rotating shaft 792, switch to the state of cam part 791 and butt pin 741 butts, position at the leading section butt of the axial region 772 of the bearing surface 793 of second cam part 79 and the second adjustment screw parts 77, second cam part 79 stops operating, thereby switches to the spacing of making by 77 settings of the second adjustment screw parts.

In addition, at this moment, must make by what the second adjustment screw parts 77 were set and make spacing less than the spacing of setting by the first adjustment screw parts 76 of making, this be because, if be set at by the second adjustment screw parts 77 set to make spacing bigger, carry out the action that switches to second cam part 79 even then utilize spacing to switch cylinder 80, the cam part 791 of second cam part 79 also can't arrive butt pin 741, can't switch to the spacing of making by 77 settings of the second adjustment screw parts.That is, the above-mentioned second adjustment screw parts 77 are used for little spacing setting.

As Fig. 5 and shown in Figure 8, direction is switched an end of the plunger binding connecting rod body 82 of cylinder 81, and a wrist of the other end of this connecting rod body 82 and bell crank parts 83 links, and wherein, these bell crank parts 83 are supported rotationally by pedestal part 21.In addition, another wrist of bell crank parts 83 and an end of connecting rod body 84 link, and the rolling ladder portion of the switching wrist 85 on the other end of this connecting rod body 84 and the end that is fixedly mounted on regulating shaft 72 links.

And, according to said structure,, direction carries out backward movement if switching the plunger of cylinder 81, then via

linkage component

82,84, bell crank parts 83 and switch wrist 85, regulating shaft 72 is applied clockwise rotatory force in Fig. 6～8.And, thus, each butt pin 731,741 respectively the forward feeding adjusting portion 785,795 from cam part 781,791 to reverse feeding adjusting portion 786,796 side shiftings, making with one of them setting of the first and second

adjustment screw parts

76,77 under the situation that spacing makes, all can carry out from the switching of forward feeding to reverse feeding.

In addition, on above-mentioned connecting rod body 82, part indicates mark 821 therebetween.This mark is additional for following purpose, promptly, because in spacing switching controls described later, direction is switched cylinder 81 and need be driven with the small actuating quantity that can not switch the degree of making direction, so need the action of this small actuating quantity be detected.

Promptly, on this connecting rod body 82, the example of the optical position detecting sensor 87(detecting unit that mark 821 is detected is set in the lump), only retreat mobile if direction is switched the plunger of cylinder 81 with the small actuating quantity of predesignating, the detection range of mark 821 in-position detecting sensors 87 then, output detection signal.Then,, then control, can not produce the action that surpasses above-mentioned small actuating quantity so that direction switching cylinder 81 stops if detecting the action of small actuating quantity thus.

[control system of Sewing machines]

With reference to Fig. 9, the control system of above-mentioned Sewing machines 10 is described.

Sewing machines 10 have to each structure move control control part 90.And, in this control part 90, be connected via driving electromagnetic valve 802 that loop 803,812 and the action of spacing being switched cylinder 80 control and direction being switched the electromagnetic valve 811 that the action of cylinder 81 controls respectively, and be connected with the aforesaid position-detection sensor 87 that is provided with in the lump with direction switching cylinder 81.

In addition, control part 90 via interface 97 and spacing change-over switch 95 with the positive and negative direction change-over switch of switching 96 of making direction is connected, wherein, this spacing change-over switch 95 is used for that spacing is made in the setting that the spacing and the second adjustment screw parts 77 are made in the setting of the first adjustment screw parts 76 and switches.

In addition, in this control part 90, be connected with encoder 17 via Motor Drive loop 161, it detects sewing machine electromotor 16 and rotating speed thereof.

Control part 90 has CPU91, ROM92, RAM93, EEPROM94, when making, Yi Bian monitor the output of encoder 17, Yi Bian control so that sewing machine electromotor 16 is kept the mode of target velocity.

The cloth feeding adjusting device of present embodiment has cloth feeding adjusting mechanism 70 and control system shown in Figure 9.

[spacing switching controls]

In sequential chart shown in Figure 10, the spacing switching controls that control part 90 carries out at cloth feeding adjusting mechanism 70 is described.

At first,, shown in Fig. 6 (B), be in the cam part 781 of first cam part 78 and the state of butt pin 731 butts, make with the spacing of setting by the first adjustment screw parts 76 of making as the prerequisite of action.In addition, at this moment, spacing is switched cylinder 80 and is in the state that plunger is retreated, and shown in Fig. 7 (A), second cam part 79 is in the state away from the second adjustment screw parts 77.In addition, direction is switched cylinder 81 as Fig. 8 (A) shown in, is in the state that makes plunger advancement, forms the forward feeding adjusting portion 785 in the cam part 781 of current selected first cam part 78 and the state of butt pin 731 butts.

Then, if spacing change-over switch 95 is pressed (Figure 10 (A) connection), then control part 90 is controlled electromagnetic valves 811 and is made the plunger that direction is switched cylinder 81 retreat (Figure 10 (B) connection).In addition, control electromagnetic valve 802 simultaneously and make spacing switch the plunger advancement (Figure 10 (C) connection) of cylinder 80.

By the action that this direction is switched cylinder 81, the clockwise direction of regulating shaft 72 in Fig. 7 rotates, and butt pin 741 moves to the direction of leaving from the forward feeding adjusting portion 795 of cam part 791.And meanwhile, spacing is switched cylinder 80 shown in Fig. 7 (B), and the upper end of pushing second cam part 79 makes cam part 791 to butt pin 741 side shiftings.At this moment, move and butt pin 741 moves to the direction of leaving from forward feeding adjusting portion 795 to the direction of leaving from forward feeding adjusting portion 785, thereby avoid or reduce above-mentioned butt pin and cam part slip each other by butt pin 731.Thus, spacing is switched cylinder 80 and can successfully be carried out change action with less output.

On the other hand, if it is mobile to a certain degree to retreat that direction is switched the plunger of cylinder 81, then detect mark 821(Fig. 8 (B) and Figure 10 (D) connection) by position-detection sensor 87, control part 90 stops the action (Figure 10 (B) disconnection) that direction is switched cylinder 81 in this sensor, make plunger recover forward travel state.

Thus, butt pin 741 returned before arriving the reverse feeding adjusting portion 796 of cam part 791, and butt pin 741 and forward feeding adjusting portion 795 butts are made spacing thereby be set at by what the second adjustment screw parts 77 set.

In addition, if pressing spacing change-over switch 95(Figure 10 (A) once more disconnects), then recover following state, promptly, the plunger that spacing is switched cylinder 80 retreats (Figure 10 (C) disconnection), the cam part 791 of second cam part 79 is left from butt pin 741, and the cam part 781 of first cam part 78 is butt butt pin 731 once more, thereby recovers the spacing of making by 76 settings of the first adjustment screw parts.

[effect of first embodiment]

In Sewing machines 10, in the spacing switching controls, make spacing when switching at the state of making spacing from the setting of having selected the first adjustment screw parts 76 to the setting of the second adjustment screw parts 77, switch cylinder 80 side by side with spacing, make direction switch cylinder 81 and drive can not switching in the scope of making direction.

Thus, each butt pin 731,741 produces to reverse feeding adjusting portion 786,796 sides from forward feeding adjusting portion 785,795 and moves, during this period, because spacing is switched the change action of carrying out to second cam part 79 with cylinder 80, so can avoid or reduce sliding-contact between the cam part 791 of sliding-contact between the cam part 781 of the butt pin 731 and first cam part 78 and the butt pin 741 and second cam part 79.Thus, sliding friction reduces, and the load that spacing is switched with cylinder 80 reduces, and can use the less small-sized cylinder of output.

In addition, reduce, can carry out change action more quickly by sliding friction.

In addition, reduce, can reduce the wearing and tearing of parts, realize the raising of durability and maintainability by sliding friction.

In addition, preferably in above-mentioned Sewing machines 10, the action that direction in the spacing switching controls is switched cylinder 81 is not carried out in butt pin 741 does not arrive the scope of reverse feeding adjusting portion 796 of cam part 791, in order to satisfy this condition, be provided for direction is switched the position-detection sensor 87 that situation that cylinder 81 moves within the specific limits detects, make direction switch the control that cylinder 81 stops according to the detection of this position-detection sensor 87.

Thus, can make direction switch cylinder 81 with suitable actuating quantity action, can avoid butt pin 741 to produce situations such as sliding friction with reverse feeding adjusting portion's 796 butts of cam part 791, can improve the reliability of mechanism by carrying out more reliable action.

[other]

In addition, in above-mentioned Sewing machines 10, switch the small action of cylinder 81 execution in order to make the direction in the spacing switching controls, and carry out following control, that is, utilize position-detection sensor 87, after the actuating quantity of reality arrives desired value, make direction switch cylinder 81 and stop, but the stop condition of direction switching cylinder 81 is not limited to actuating quantity, for example also can set based on actuation time.

For example, switch under the situation that cylinder 81 makes the action required time butt pin 741 arrives reverse feeding adjusting portion 796 from forward feeding adjusting portion 795 till in the known direction of utilizing in advance, also can carry out following control, promptly, to move the shorter time set of required time than this is the actuation time that direction is switched cylinder 81, in the moment, make direction switch cylinder 81 and stop through this actuation time.

For example, at above-mentioned action required time is 10[ms] situation under, carry out following control, promptly, the onboard clock (example of timing unit) of the CPU91 that utilizes control part 90 direction is switched cylinder 81 after drive beginning through than action required time 10[ms] shorter time, for example 5[ms] and carry out timing after, the action that direction is switched cylinder 81 is stopped.

Thus, in the spacing switching controls, can make direction switch cylinder 81 and move, can obtain the effect identical with the situation of use location detecting sensor 87 with small actuating quantity.

[second embodiment]

As second embodiment, another example of explanation cloth feeding adjusting mechanism in Figure 11 and Figure 13.In addition, in above-mentioned accompanying drawing, omit the diagram of feeding adjusting body 55, only illustrate its back shaft 56.In addition, feeding adjusting body 55 and feed arrangement 40 are and the first embodiment identical mechanism.

In aforementioned cloth feeding adjusting mechanism 70, feeding adjusting

wrist

73,74 and

cam part

78,79 respectively have two, and this cloth feeding adjusting 70A of mechanism only uses a feeding adjusting wrist and cam part this point different with cloth feeding adjusting mechanism 70.

The cloth feeding adjusting 70A of mechanism has: input wrist 71A, and it is fixedly mounted on the feeding adjusting body 55 via back shaft 56; Regulating shaft 72A, it is rotatably supported with the state along X-direction in pedestal part 21; Feeding adjusting wrist 73A, it is fixedly mounted on this regulating shaft 72A; Connecting rod body 75A, it links the pivoting end of feeding adjusting wrist 73A and input wrist 71A; The first and second

adjustment screw parts

76A, 77A(first and second regulate examples of members), it makes the setting of spacing by manual dial operation; Cam part 78A, it can be supported rotationally around X-axis in pedestal part 21; Spacing is switched the example of cylinder 80A(spacing switching actuator), it switches the spacing of making that is set by the first and second

adjustment screw parts

76A, 77A respectively; Direction is switched the example of cylinder 81A(direction of feed switching actuator), the positive and negative of direction made in its switching; And switch wrist 85A, its output of direction being switched cylinder 81A is transmitted to regulating shaft 72A.

In addition, above-mentioned regulating shaft 72A, feeding adjusting wrist 73A and switch wrist 85A binding fixed to one another work as the rotor 86A that carries out rotational action around X-axis integratedly in pedestal part 21.

Above-mentioned input wrist 71A is to the back shaft 56 along X-direction being the extension of radius centered direction.And, in the same manner, can be by connecting rod body 75A and the feeding adjusting wrist 73A interlock that can rotate around X-axis.

Feeding adjusting wrist 73A has the example of the butt pin 731A(abutting part of the boss shape that protrudes along X-direction in its side surface part), form the structure that rotational angle that the regulating shaft 72A by the opposing connection feeding adjusting wrist 73A with the cam part 781A butt of cam part 78A rotates is fixed.

The first and second

adjustment screw parts

76A, 77A form the structure roughly the same with aforementioned adjustment screw parts 76,77.Thus, the rotary manipulation that has by the 761A of its dial portion, 771A carries out axial region 762A, the 772A that forward/backward moves.

And, under the situation of the above-mentioned first and second

adjustment screw parts

76A, 77A, also usually make spacing with the setting of the first adjustment screw parts 76A and make, spacing is made in the setting that can switch to the second adjustment screw parts 77A by the action that spacing is switched cylinder 80A.

In addition, under the situation of forward feeding and reverse feeding, all make this point and need make the setting of the second adjustment screw parts 77A make spacing and make the spacing this point less than the setting of the first adjustment screw parts 76A with the same settings spacing, identical with each

adjustment screw parts

76,77.

But the above-mentioned first and second

adjustment screw parts

76A, 77A be in the side of sewing machine stand, serves as top and configuration side by side up and down with the first adjustment screw parts 76A.

And, in the inside of sewing machine stand 20, dispose cam part 78A in the place ahead of the axial region 762A, the 772A that are arranged above and below.

This cam part 78A is provided with respectively the first and second bearing surface 787A, the 788A with axial region 762A, 772A butt up and down side by side, has between bearing surface along the example of the turning cylinder 782A(back shaft of X-direction).In addition, on this turning cylinder 782A, torsion-coil spring 789A is installed, this torsion-coil spring 789A with the first bearing surface 787A of cam part 78A to pushing with the direction of the first adjustment screw parts 76A crimping.

In addition, cam part 78A is adjacent to configuration with feeding adjusting wrist 73A on X-direction, cam part 78A with the end of each

bearing surface

787A, 788A opposition side near the cam part 781A that forms, engage with the butt pin 731A of feeding adjusting wrist 73A.

As shown in figure 13, the cam part 781A of cam part 78A is forming on the tabular cam part 78A, forms with the perforation of general triangular shape.The position suitable with a leg-of-mutton limit of this cam part 781A forms the forward feeding adjusting 785A of portion, and position that be equivalent to an adjacent limit relative with the forward feeding adjusting 785A of portion forms the reverse feeding adjusting 786A of portion, and the position suitable with the summit between above-mentioned adjusting portion 785A and the 786A forms centre position 784A.

This cloth feeding adjusting 70A of mechanism has following characteristics, as noted above constitute cam part 78A and feeding adjusting wrist 73A respectively by parts in, realize making the switching of spacing by the setting that two

adjustment screw parts

76A, 77A set.

Its operating principle is described.At first, if utilize the first adjustment screw parts 76A that the desired spacing of making is set adjusting, utilize 77A pair of the second adjustment screw parts to compare the less desired spacing of making and set adjusting with the spacing of setting by the first adjustment screw parts 76A of making, then make the bearing surface 787A and the first adjustment screw parts 76A crimping of cam part 78A, between the bearing surface 788A and the second adjustment screw parts 77A, form the gap by torsion-coil spring 789A.

Butt pin 731A shown in the solid line of Figure 13 illustrates the butt position relative with the forward feeding adjusting 785A of portion this moment.

When spacing was switched, spacing switched that cylinder 80A moves and plunger is pushed near the upper surface the rearward end of cam part 78A downwards.Thus, cam part 78A is center and rotating to illustrated counter clockwise direction with turning cylinder 782A, switches to the state of the bearing surface 788A and the second adjustment screw parts 77A crimping.And, if cam part 78A rotates to counter clockwise direction, move (the butt pin 731A of double dot dash line) towards centre position 784A when then butt pin 731A slides on the forward feeding adjusting 785A of portion, therefore, the feeding adjusting wrist 73A(that engages with butt pin 731A omits diagram in Figure 13) clockwise direction in Figure 13 rotates.Thus, feeding adjusting body 55 rotates with feeding adjusting wrist 73A, thereby spacing is made in the setting that switches to the second adjustment screw parts 77A.

In addition, direction switch cylinder 81A from the forward feeding when reverse feeding is switched, apply the rotation of the direction of arrow (clockwise direction) in Figure 12 to switching wrist 85A.Thus, feeding adjusting wrist 73A rotates to clockwise direction with switching wrist 85A, and the position of the 731R of butt pin 731A in Figure 13 is moved.Thus, can make butt pin 731A and the reverse feeding adjusting 786A of portion butt, feeding adjusting body 55 be turned to setting make the state that spacing is carried out reverse feeding.

Spacing switching controls among the cloth feeding adjusting 70A of mechanism that is made of said structure is described.Even under the situation of this cloth feeding adjusting 70A of mechanism, direction is switched cylinder and is also switched cylinder 81 in the same manner with aforementioned direction, indicate mark at its forward/backward action position, by position-detection sensor to can not detecting from the small action that the forward feeding switches to reverse this degree of feeding.

And, switch cylinder 80A and direction is switched cylinder for spacing, with aforementioned intervals is switched cylinder 80 and direction switch action control that cylinder 81 carries out in the same manner shown in the sequential chart of Figure 10, move control.

That is, when spacing was switched, spacing switches cylinder 80A and direction switching cylinder begins action simultaneously.Thus, switching cylinder by direction makes butt pin 731A leave from the forward feeding adjusting 785A of portion of cam part 781A, meanwhile, utilizing spacing to switch cylinder 80A rotates cam part 78A, therefore, butt pin 731A can not move to the desired location of being set by the second adjustment screw parts 77A on the forward feeding adjusting 785A of portion slidably.

In addition, if detect small action by position-detection sensor, then the plunger of direction switching cylinder returns initial position, therefore, can make butt pin 731A move to the precalculated position.

That is, for this cloth feeding adjusting 70A of mechanism, also with the situation of cloth feeding adjusting mechanism 70 in the same manner, switch cylinder 80A for spacing, can realize miniaturization, improve the rapidity of action and the skimming wear that reduces each parts.

[the 3rd embodiment]

As the 3rd embodiment, in Figure 14 and Figure 15, illustrate that rotary driving force with bottom and top feed axle 43 is transformed to reciprocal rotating drive power and another example of the transmission mechanism 48 that transmits to horizontal feed axle 46.That is, aforementioned cloth feeding

adjusting mechanism

70,70A all are defined in transmission mechanism 48, but also can use the transmission mechanism 48B shown in following.In the explanation to this transmission mechanism 48B, at the structure mark identical label identical with aforementioned Sewing machines 10, the repetitive description thereof will be omitted.

Transmission mechanism 48B has: eccentric cam 49B, and it is fixedly mounted on the bottom and top feed axle 43; Toggle-action lever 50B, the one end links via eccentric cam 49B and bottom and top feed axle 43; Swing arm 51B, it is fixedly mounted on the horizontal feed axle 46, and is that swing at the center with this horizontal feed axle 46; And variable 52B of the amount of feeding, link between its swing end, and the amplitude of the reciprocal rotational angle that can subtend horizontal feed axle 46 transmits is regulated the other end of toggle-action lever 50B and swing arm 51B.

Variable 52B of the amount of feeding has: connecting rod body 53B, and an end of its length direction and the swing end of swing arm 51B link, and the other end of pars intermedia and toggle-action lever 50B links; A pair of square slider 54B, it remains on the other end of length direction of this connecting rod body 53B; Feeding adjusting body 55B, it has the guiding groove 551B of square shaped slide block 54B channeling conduct; And back shaft 56B, it can rotate feeding adjusting body 55B around Y-axis.

The both ends of above-mentioned connecting rod body 53B and pars intermedia can link swing arm 51B, square slider 54B and toggle-action lever 50B rotationally around Y-axis respectively.

And, because the binding of the other end of the pars intermedia of connecting rod body 53B and toggle-action lever 50B, so, then be applied in the reciprocating action that comprises the above-below direction composition if bottom and top feed axle 43 is rotated.And, square slider 54B is installed on the other end of connecting rod body 53B, this square slider 54B forms following structure,, limits its moving direction by the guiding groove 551B that is formed on the feeding adjusting body 55B that is.

In the case, for example as shown in figure 15, if guiding groove 551B is towards above-below direction, then the reciprocating action that inputs to connecting rod body 53B from toggle-action lever 50B also is roughly above-below direction, this connecting rod body 53B with and swing arm 51B between linking part be that fulcrum carries out reciprocal rotational action.Therefore, the pivoting end side of swing arm 51B becomes roughly inactive state, does not transmit rotational action to horizontal feed axle 46.That is, this is oriented the neutral angle among the feeding adjusting body 55B.

Then, if feeding adjusting body 55B is rotated to any side from neutral angle, then guiding groove 551B tilts to oblique direction, therefore, in connecting rod body 53B, produce the reciprocating action composition of left and right directions (X-direction), because this composition also is passed to the pivoting end of swing arm 51B, so also transmit rotational action to horizontal feed axle 46.And stroke and the feeding adjusting body 55B of reciprocal rotation that is passed to horizontal feed axle 46 is corresponding and change apart from the angles shifts amount of neutral angle.

In addition, rotate to clockwise direction and anticlockwise one of them direction from neutral angle, thereby be passed to the phasing back of the reciprocating action of horizontal feed axle 46 by making feeding adjusting body 55B.Thus, can regulate positive direction and the reciprocal spacing of making arbitrarily with accordingly to the rotational angle of all directions.

Aforementioned cloth feeding

adjusting mechanism

70,70A be by installing

input wrist

71,71A on the back shaft 56B in above-mentioned transmission mechanism 48B, thereby can realize and transmission mechanism 48 identical functions.

In the above-described embodiment, regulate examples of members as first and second, the first and second adjustment screw parts have been described, as long as but first and second regulate in the parts one or both and can forward/backward move by operation, also can not have screw and construct.In addition, in the above-described embodiment, example as spacing switching actuator and direction of feed switching actuator, illustrated that spacing is switched cylinder and direction is switched cylinder, but in spacing switching actuator and the direction of feed switching actuator one or both also can be the actuators except cylinder.

Claims

1. the cloth feeding adjusting device of a Sewing machines, it has:

First cam part, it rotatably is supported on the Sewing machines framework by first back shaft;

Second cam part, it rotatably is supported on the Sewing machines framework by second back shaft;

First regulates parts, and forward/backward moves by operation for it, pushes described first cam part and limits the position of rotation of described first cam part;

Second regulates parts, and forward/backward moves by operation for it, with the described second cam part butt time, pushes described second cam part and limits the position of rotation of described second cam part;

The spacing switching actuator, itself and described second cam part link, and make second cam part and described second regulate parts and contact/leave; And

Control part, it drives described spacing switching actuator,

Described first cam part has first cam part, it will make spacing is that 0 centre position is as the border, relatively form the reverse feeding adjusting portion of making spacing to set the forward feeding adjusting portion of making spacing of forward direction of feed and can set reverse direction of feed

Described second cam part has second cam part, it will make spacing is that 0 centre position is as the border, relatively form the reverse feeding adjusting portion of making spacing to set the forward feeding adjusting portion of making spacing of forward direction of feed and can set reverse direction of feed

The cloth feeding adjusting device of this Sewing machines is characterised in that,

Described cloth feeding adjusting device also has:

Rotor, its have can with the abutting part of one of them butt of described first cam part and described second cam part, can be that the center is supported on the Sewing machines framework rotatably with an axle, and corresponding with its anglec of rotation and in the scope that is fed to reverse feeding from forward change make spacing; And

The direction of feed switching actuator, itself so that described abutting part described first and second cam part one of them described forward feeding adjusting portion and described reverse feeding adjusting portion between the mode that moves, make described rotor rotation, thus, switch to other direction from one of them direction of forward direction of feed and reverse direction of feed making direction

When control part begins in the action of described spacing switching actuator, described direction of feed switching actuator is driven can not switching in the scope of making direction.

2. the cloth feeding adjusting device of a Sewing machines, it has:

Cam part, it rotatably is supported on the Sewing machines framework by back shaft;

First regulates parts, and forward/backward moves by operation for it, pushes described cam part and limits the position of rotation of described cam part;

Second regulates parts, and forward/backward moves by operation for it;

The spacing switching actuator, itself and described cam part link, and make described cam part and described second regulate parts and contact/leave; And

Control part, it drives described spacing switching actuator,

Described cam part has cam part, its will make spacing be 0 centre position as the border, relatively form the reverse feeding adjusting portion of making spacing that can regulate the forward feeding adjusting portion of making spacing of forward feeding and can regulate reverse feeding,

Described cloth feeding adjusting device also has:

Rotor, its have can with the abutting part of described cam part butt, can be that the center is supported on the Sewing machines framework rotatably with an axle, and corresponding with its anglec of rotation and in the scope that is fed to reverse feeding from forward change make spacing; And

The direction of feed switching actuator, it is so that the mode that described abutting part moves between the described forward feeding adjusting portion of described cam part and described reverse feeding adjusting portion, make described rotor rotation, thus, switch to other direction from one of them direction of forward direction of feed and reverse direction of feed making direction

3. the cloth feeding adjusting device of Sewing machines according to claim 1 and 2 is characterized in that,

Also have the detecting unit that the compulsory exercise amount to described direction of feed switching actuator detects,

Described control part till detecting described compulsory exercise amount until described detecting unit, the action of the described direction of feed switching actuator the when action of carrying out described spacing switching actuator begins.

4. the cloth feeding adjusting device of Sewing machines according to claim 1 and 2 is characterized in that,

Also have the timing unit that carries out timing actuation time to described direction of feed switching actuator,

Described control part until described timing unit timing till the specified action time, the action of the described direction of feed switching actuator the when action of carrying out described spacing switching actuator begins.