CN103031672B - Sewing machine - Google Patents
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- CN103031672B CN103031672B CN201210365293.4A CN201210365293A CN103031672B CN 103031672 B CN103031672 B CN 103031672B CN 201210365293 A CN201210365293 A CN 201210365293A CN 103031672 B CN103031672 B CN 103031672B
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Abstract
The invention provides a sewing machine, which can easily adjust conveying exercise amount of cloth feeding teeth in upper and lower directions. An up-and-down conveying mechanism is provided with an eccentric mechanism part having an eccentric shaft bearing part and a base part. The eccentric shaft bearing part is provided with an eccentric shaft and a rotating shaft. The base part is provided with a shaft fixing hole and a fixing hole. Upper and lower conveying shafts are inserted in the shaft fixing hole for fixing. A rotating shaft of the eccentric shaft bearing part is supported on the fixing hole in a rotatable manner. The eccentric shaft bearing part can rotate with the fixing hole as the center. The eccentric shaft is eccentric to the up-and-down conveying shaft which is fixed by being inserted in the shaft fixing hole. The operator can change the distance between the center of shaft fixing hole and the center of the eccentric shaft by rotating the eccentric shaft bearing part. The operator can easily adjust the eccentric amount of the eccentric shaft with respect to the up-and-down conveying shaft. Accordingly, the operator can easily adjust back-and-forth moving amount of the cloth feeding teeth in upper and lower directions.
Description
Technical field
The present invention relates to a kind of Sewing machines with the cloth pushing table of supporting cloth conveying teeth.
Background technology
Sewing machines makes cloth pushing table carry out the motion of horizontal direction and above-below direction.Cloth pushing table supporting cloth conveying teeth.The conveying campaign that cloth conveying teeth carries out has the track of substantially elliptical.Therefore Sewing machines can utilize cloth conveying teeth work feed.Change the period of work feed according to the momental variation of the conveying of above-below direction.The variation in the period of work feed can change the tightness of line, therefore can impact sewing quality.When the sewing conditions such as the kind of made cloth, thickness change, operator need to change conveying amount of exercise by changing the track of the substantially elliptical of cloth conveying teeth, and makes the tightness etc. of line corresponding with sewing condition.For example to make with the moving eccentric cam coordinating in the lower end of upper and lower conveying arm be pair eccentric cam structures to the cloth-feeding device of the Japanese Unexamined Patent Publication calendar year 2001 No. 162076 disclosed Sewing machiness of communique.The peak exercise of the above-below direction of cloth conveying teeth is variable.Two eccentric cam structures are eccentric at two places.Operator need to be by considering that the offset on each eccentric position calculates whole offset.Therefore the momental adjusting of conveying of cloth conveying teeth is comparatively complicated and be not easy to implement.
Summary of the invention
The object of the present invention is to provide a kind of momental Sewing machines of conveying that can easily regulate the above-below direction of cloth conveying teeth.
The Sewing machines of technical scheme 1 has: cloth pushing table, and it supports cloth conveying teeth; Upper and lower conveying axis, the rotation of itself and main shaft is rotated linkedly; Eccentric stiffener portion, it has by an end of above-mentioned upper and lower conveying axis is inserted wherein fixes the axle fixing hole of above-mentioned upper and lower conveying axis and with respect to the eccentric shaft of the center bias of above-mentioned axle fixing hole; And upper and lower conveying arm, it supports an end of above-mentioned eccentric shaft, above-mentioned cloth pushing table is moved up and down, wherein, above-mentioned eccentric stiffener portion has eccentric shaft support, this eccentric shaft support with can make above-mentioned eccentric shaft with respect to the center of above-mentioned axle fixing hole along and the mode that moves of the direction of the axial quadrature of above-mentioned upper and lower conveying axis support above-mentioned eccentric shaft.Eccentric shaft support supports eccentric shaft in the mode that can make eccentric shaft and move with respect to the conveying axis being up and down fixed in axle fixing hole.Therefore Sewing machines freely eccentric adjustment axle with respect to the offset of upper and lower conveying axis.Therefore operator can regulate the round amount of movement of the above-below direction of cloth conveying teeth simply.
In the Sewing machines of technical scheme 2, above-mentioned eccentric shaft support has: main part, and its direction along the axial quadrature with above-mentioned eccentric shaft is extended, and at one end portion is extruded with above-mentioned eccentric shaft; And axial region, it is given prominence to a other end above-mentioned end opposition side and to the contrary direction of the projected direction with above-mentioned eccentric shaft aforementioned body portion, above-mentioned eccentric stiffener portion also has: axle support, and it supports above-mentioned axial region in the mode that can make above-mentioned axial region rotate; And fixed part, it is fixed on above-mentioned axle support by above-mentioned axial region in the mode that cannot rotate with respect to above-mentioned axle support.Axial region supports in the mode that can make axial region rotate on axle support in eccentric stiffener portion.Eccentric shaft support rotates centered by axial region.Eccentric shaft changes with respect to the position of upper and lower conveying axis.Therefore the Sewing machines offset of eccentric adjustment axle freely.And fixed part can be fixed on above-mentioned axle support in the mode that cannot rotate with respect to axle support by axial region.Therefore Sewing machines can prevent that the offset of eccentric shaft from changing in the course of action of cloth conveying teeth.
In the Sewing machines of technical scheme 3, above-mentioned axle support has: inner peripheral surface, the outer peripheral face that it is cylindric and can be closely attached on above-mentioned axial region; And locking slot, its Axis Extension along above-mentioned cylinder and extend to above-mentioned fixed part from above-mentioned inner peripheral surface, above-mentioned fixed part has: the first screwed hole, it,, along the direction setting of the bearing of trend quadrature with above-mentioned locking slot, connects above-mentioned locking slot; And first screw, it is by being threadedly engaged with and connecting above-mentioned locking slot with above-mentioned the first screwed hole, thereby make the narrowed width of above-mentioned locking slot, by above-mentioned the first screw and above-mentioned the first screwed hole, be threadedly engaged with the narrowed width that makes above-mentioned locking slot, thereby make the above-mentioned inner peripheral surface of above-mentioned axle support be closely attached on the outer peripheral face of above-mentioned axial region and in the mode that cannot rotate, above-mentioned axial region be fixed.Axle support has locking slot.By making the narrowed width of locking slot, the inner peripheral surface of axle support is closely attached on the outer peripheral face of axial region.Therefore Sewing machines can be fixed on above-mentioned axle support in the mode that cannot rotate with respect to axle support by axial region.
In the Sewing machines of technical scheme 4, above-mentioned axial region has at least one par on outer peripheral face, above-mentioned axle support has the second screwed hole towards the outer peripheral face perforation of above-mentioned axial region, above-mentioned fixed part has the second screw, this second screw is by being threadedly engaged with and being connected to above-mentioned par with above-mentioned the second screwed hole, thereby with respect to above-mentioned axle support, above-mentioned axial region location is fixed on assigned position.Par is for example parallel to for using the cross section that the axial plane of axial region removes to cut axial region gained.The second screw is assembled in the second screwed hole that is arranged at axle support.The top of the second screw contacts with par.Therefore fixed part can easily be fixed on axial region location on assigned position with respect to axle support.
In the Sewing machines of technical scheme 5, above-mentioned upper and lower conveying arm has bearing in the part of an above-mentioned end of the above-mentioned eccentric shaft of supporting.The friction producing between upper and lower conveying arm and eccentric shaft support diminishes because of bearing, and conveying arm, without do very greatly in order to keep intensity, can be realized lightweight up and down.Therefore Sewing machines can improve and makes conveying axis up and down that upper and lower conveying arm the moves up and down servo-actuated property to the driving of main motor.
Accompanying drawing explanation
Fig. 1 is the stereogram of Sewing machines 1.
Fig. 2 is near amplification stereogram sewing needle 8 and needle plate 15.
Fig. 3 is the stereogram of cloth feeding mechanism 30.
Fig. 4 is the exploded perspective view of upper and lower conveying mechanism 26.
Fig. 5 is the exploded perspective view of eccentric stiffener portion 40.
Fig. 6 means the figure of position relationship of the first state of eccentric stiffener portion 40.
Fig. 7 means the figure of position relationship of the second state of eccentric stiffener portion 40.
Fig. 8 is the stereogram of eccentric shaft support 170.
Fig. 9 means the figure of position relationship of the third state of eccentric stiffener portion 140.
Figure 10 means the figure of position relationship of the 4th state of eccentric stiffener portion 140.
The specific embodiment
With reference to the accompanying drawings of one embodiment of the present invention.The structure of Sewing machines 1 is described with reference to Fig. 1～Fig. 3.The upside of Fig. 1, Fig. 2, downside, right side, left side, face side, rear side are respectively upside, downside, right side, left side, front side, the rear sides of Sewing machines 1.
Sewing machines 1 has support portion 2, column sections 3, horn portion 4.Support portion 2 is pedestals of Sewing machines 1.Support portion 2 is installed on the recess (omitting diagram) of the upper surface of workbench 20 from top.Column sections 3 is extended to vertical top from the right-hand member of support portion 2.Horn portion 4 extends to left from the upper end of column sections 3, relative with the upper surface of support portion 2.Horn portion 4 is provided with presser feet 17 below left part.Horn portion 4 maintains shank 7 in inside, shank 7 is provided with sewing needle 8(with reference to Fig. 2 in lower end).Shank 7 moves along with the driving of main motor 13 up and down with sewing needle 8.Horn portion 4 has thread take-up tension lever 9 in the place ahead, left part, and thread take-up tension lever 9 moves up and down linkedly with shank 7.Horn portion 4 has operating portion 10 on top, operating portion 10 has liquid crystal panel 11 at front surface.Operator is while seeing liquid crystal panel 11 operating operation portions 10, by various indication input Sewing machiness 1.
Sewing machines 1 has control device 29 at the lower surface of workbench 20.Control device 29 is connected with the pedal 22 of override type by means of bar 21.Operator is to rear side or front side operating pedal 22.Control device 29 is controlled the action of Sewing machines 1 according to the direction of operating of pedal 22 and operational ton.Column sections 3 has main motor 13 on right flank top.Horn portion 4 has main shaft 14 in inside, state in the horn portion 4 inside to the left and right direction extension of main shaft 14 rotating.The right-hand member of main shaft 14 is connected with main motor 13, and the left end of main shaft 14 is connected with shank up-down mechanism (omitting diagram).Main motor 13 moves up and down shank 7 and thread take-up tension lever 9 by driving main shaft 14.
As shown in Figure 2, support portion 2 has needle plate 15 at upper surface left end, and needle plate 15 has pin hole 18 in substantial middle portion.Pin hole 18 is passed through in the lower end of sewing needle 8 when declining.Needle plate 15 respectively at the left of pin hole 18, the place ahead, rear, right-handly there is work feed perforation 19.Work feed perforation 19 is rectangular shape longer on fore-and-aft direction.Support portion 2 has rotary shuttle mechanism (omitting diagram), cloth feeding mechanism 30(with reference to Fig. 3 below needle plate 15).
The structure of cloth feeding mechanism 30 is described with reference to Fig. 3.The upside of Fig. 3, downside, right side, left side, face side, rear side are respectively upside, downside, right side, left side, front side, the rear sides of cloth feeding mechanism 30.Cloth feeding mechanism 30 has cloth pushing table 33, cloth conveying teeth 34, horizontal transport agency 25, upper and lower conveying mechanism 26 etc.Cloth pushing table 33 is positioned at needle plate 15(with reference to Fig. 2) below and with needle plate 15 almost parallels.Cloth pushing table 33 supports cloth conveying teeth 34 near the center of upper surface.Cloth conveying teeth 34 is corresponding with the position of work feed perforation 19.Cloth conveying teeth 34 is longer on fore-and-aft direction.The length of the Length Ratio work feed perforation 19 of the fore-and-aft direction of cloth conveying teeth 34 is short.Cloth conveying teeth 34 has for clamp the concavo-convex of cloth between cloth conveying teeth 34 and presser feet 17 on top.
With reference to Fig. 3, horizontal transport agency 25 is described.Horizontal transport agency 25 has work feed motor 62, linkage portion 65, horizontal feed axle 28, link component 50 etc.Work feed motor 62 is configured in the right-hand of cloth pushing table 33.Work feed motor 62 is stepping motors.Linkage portion 65 has effect arm 68, the first arm 66, the second arm 67.One end quadrature of the first arm 66 is installed on the top of the driving shaft 63 of work feed motor 62.The other end of the first arm 66 is connected with the mode that can rotate and one end of the second arm 67 by means of linking part 97.The other end of the second arm 67 is connected with one end of effect arm 68 in the mode that can rotate by means of linking part 96.Effect arm 68 is installed the right-hand member side of horizontal feed axle 28 at the other end.Horizontal feed axle 28 is supported on support portion 2 at the left of work feed motor 62 in the mode that can rotate.Horizontal feed axle 28 extends along left and right directions.If driving shaft 63 comes and goes, rotate, linking part 97 comes and goes mobile along the vertical direction.Linking part 96 is the mobile interlock with linking part 97 by the second arm 67, and therefore, effect arm 68 swings centered by another is distolateral.Horizontal feed axle 28 is accompanied by the swing of effect arm 68 and rotates in the scope of predetermined angular.The lower end quadrature of link component 50 is installed on the left part of horizontal feed axle 28.The upper end of link component 50 is connected with the mode that can rotate and the axle support 36 that is positioned at the leading section of cloth pushing table 33.Therefore,, if horizontal feed axle 28 rotates in the scope of predetermined angular, cloth pushing table 33 is round mobile along the fore-and-aft direction of Sewing machines 1 by means of link component 50.
With reference to Fig. 4, upper and lower conveying mechanism 26 is described.The upside of Fig. 4, downside, right side, left side, face side, rear side are respectively upside, downside, right side, left side, front side, the rear sides of upper and lower conveying mechanism 26.Upper and lower conveying mechanism 26 has upper and lower conveying axis 27, eccentric stiffener portion 40, ball bearing 60, upper and lower conveying arm 51 etc.Upper and lower conveying axis 27 is parallel with horizontal feed axle 28.Upper and lower conveying axis 27 is supported on support portion 2 in the mode that can rotate.Upper and lower conveying axis 27 has belt wheel 24(with reference to Fig. 3 in right part).Belt wheel 24 by means of Timing Belt (omit diagram) with main shaft 14(with reference to Fig. 1) be connected.Upper and lower conveying axis 27 is driven by main motor 13 and rotates by means of the Timing Belt being attached on main shaft 14.Therefore upper and lower conveying axis 27 synchronously rotates with the main shaft 14 of Sewing machines 1.Eccentric stiffener portion 40 is arranged on the left end of upper and lower conveying axis 27.Eccentric stiffener portion 40 has eccentric shaft 72.Eccentric shaft 72 is eccentric with respect to the axle center of upper and lower conveying axis 27.The detailed content of eccentric stiffener portion 40 and eccentric shaft 72 will be described hereinafter.Upper and lower conveying arm 51 is connected with the axle support 35 of cloth pushing table 33.Axle support 35 is arranged on the rearward end of cloth pushing table 33.Upper and lower conveying arm 51 by means of ball bearing 60 described later so that the mode that the eccentric shaft 72 of eccentric stiffener portion 40 can rotate keeps this eccentric shaft 72.Eccentric stiffener portion 40 is accompanied by the rotation of upper and lower conveying axis 27 and rotates.Eccentric shaft 72 rotates while moving up and down by the rotation of eccentric stiffener portion 40, and therefore, upper and lower conveying arm 51 moves up and down.Therefore upper and lower conveying mechanism 26 can make cloth pushing table 33 move up and down.
The structure of upper and lower conveying arm 51 is described with reference to Fig. 4.Upper and lower conveying arm 51 is roughly cylindric.Upper and lower conveying arm 51 has retaining hole 55, erecting bed 52, installation portion 53, axle fixed part 54.Retaining hole 55 connects on left and right directions.Retaining hole 55 keeps ball bearing 60 in inner side.The detailed content of ball bearing 60 will be described hereinafter.Erecting bed 52 is arranged on the outer peripheral face of upper and lower conveying arm 51.Installation portion 53 is arranged on the top of erecting bed 52.Installation portion 53 is cylindric, along extending axially of retaining hole 55.Installation portion 53 has installing hole 56.Axle fixed part 54 and installation portion 53 quadrature settings.Axle fixed part 54 has screwed hole 57.Screwed hole 57 passes to the installing hole 56 of installation portion 53.The position of installing hole 56 is corresponding with the position of through hole 35A of axle support 35 that is arranged on cloth pushing table 33.Steady pin 45 inserts in through hole 35A and installing hole 56.Screw 47 is assembled in screwed hole 57.The top ends of screw thread 47 is connected to the top ends of steady pin 45.The top ends of steady pin 45 is fixed in installation portion 53.Cloth pushing table 33 can rotate with respect to steady pin 45.Cloth pushing table 33 and upper and lower conveying arm 51 are connected to each other.
The structure of eccentric stiffener portion 40 is described with reference to Fig. 5.Eccentric stiffener portion 40 has eccentric shaft support 70 and base portion 80.Eccentric shaft support 70 is described.Eccentric shaft support 70 has main part 71, eccentric shaft 72, turning cylinder 73.Main part 71 is and has the tabular of a surperficial 71A and another surperficial 71B.One surperficial 71A is with reference to Fig. 4 with cloth pushing table 33() the relative face of side.Another surperficial 71B is the face of the opposition side of a surperficial 71A, is with reference to Fig. 4 with upper and lower conveying axis 27() the relative face of side.One surperficial 71A and another surperficial 71B are substantially elliptical shape.Eccentric shaft 72 is arranged on the distolateral of the upper main part 71 of a surperficial 71A.The axis of eccentric shaft 72 and main part 71 quadratures.It is distolateral that turning cylinder 73 is arranged on another of the upper main part 71 of another surperficial 71B.The axis of turning cylinder 73 and main part 71 quadratures.Eccentric shaft 72 and turning cylinder 73 extend along opposite directions respectively with respect to main part 71.Eccentric shaft 72 is cylindric, has vertically screwed hole (omitting diagram).It is cylindric or cylindric that turning cylinder 73 is for example.
Base portion 80 is described.Base portion 80 has pedestal portion 81, axle support 82, axle fixed part 83.It is cylindric that pedestal portion 81 is part, with upper and lower conveying axis 27(with reference to Fig. 4) axially parallel ground extend.Pedestal portion 81 has an end face 81A, outer peripheral face 81B, other end 81C.One end face 81A is the face relative with eccentric shaft support 70 sides.Outer peripheral face 81B is part periphery.Other end 81C is the face of a side contrary with an end face 81A, is the face relative with upper and lower conveying axis 27 sides.Pedestal portion 81 has axle fixing hole 84.Axle fixing hole 84 is along the axial perforation of pedestal portion 81.Insert axle fixing hole 84 from other end 81C side one end of upper and lower conveying axis 27.As shown in Figure 6, pedestal portion 81 has screwed hole 81D, 81E.Screwed hole 81D, 81E be arranged on outer peripheral face 81B upper and respectively with the axis direction quadrature of axle fixing hole 84.Screwed hole 81D and screwed hole 81E are connected with axle fixing hole 84 respectively orthogonally.Pedestal portion 81 is assembled in screw 91,92 in screwed hole 81D, 81E.Screw 91,92 is connected to an end of the conveying axis up and down 27 that is inserted into axle fixing hole 84.Upper and lower conveying axis 27 is fixed in base portion 80.Base portion 80 is rotated integratedly with upper and lower conveying axis 27.
Axle support 82 is arranged on the opposition side of circular arc portion place axle fixing hole 84, outer peripheral face 81B side.Axle support 82 is cylindric.Axle support 82 extends abreast with pedestal portion 81.Axle support 82 has fixing hole 85.The turning cylinder 73 of eccentric shaft support 70 inserts in fixing hole 85.Fixing hole 85 is parallel with the axis direction of axle fixing hole 84.Axle support 82 has locking slot 86.Locking slot 86 is parallel with the axis direction of fixing hole 85.The shape of observing from eccentric shaft support 70 sides of axle support 82 is the C shape of English alphabet.
Axle fixed part 83 and axle support 82 be arranged on integratedly locking slot 86 near.Axle fixed part 83 is cylindric with the axial quadrature of axle support 82.Axle fixed part 83 has screwed hole 87 and slot part 88.Screwed hole 87 is along the axis direction setting of axle fixed part 83.Slot part 88 is connected with locking slot 86.Axle fixed part 83 separates vertically at slot part 88 places.Axle fixed part 83 narrows down the inner space of axle support 82, is fixedly inserted into the turning cylinder 73 in the fixing hole 85 of axle support 82.
The assemble method of eccentric stiffener portion 40 is described.Another surperficial 71B of the main part 71 of operator and eccentric shaft support 70 relatively configures an end face 81A of base portion 80, and the turning cylinder of eccentric shaft support 70 73 is inserted in the fixing hole 85 of base portion 80.Eccentric shaft support 70 can rotate with respect to base portion 80 centered by turning cylinder 73.Operator is by eccentric shaft support 70 is rotated, can eccentric adjustment axle 72 with respect to the offset of upper and lower conveying axis 27.The control method of offset will be described hereinafter.Operator is assembled in screw 90 in the screwed hole 87 of axle fixed part 83.Because the groove width of slot part 88 and the groove width of locking slot 86 narrow down, so the internal diameter of fixing hole 85 diminishes.The inner peripheral surface of fixing hole 85 is closely attached on the outer peripheral face of turning cylinder 73.Therefore turning cylinder 73 can be securely fixed on axle support 82.Eccentric shaft support 70 is fixed in base portion 80.40 assemblings of eccentric stiffener portion are complete.
The connecting structure of eccentric stiffener portion 40 and upper and lower conveying arm 51 is described with reference to Fig. 4.Upper and lower conveying arm 51 inserts maintenance ball bearing 60 in retaining hole 55 by ball bearing 60.Ball bearing 60 is for example to utilize outer ring and inner ring to surround ball, carrys out the well-known structure of transmitted load by ball.In the hole 61 of the inner ring of the eccentric shaft 72 insertion ball bearings 60 of eccentric shaft support 70.If eccentric shaft 72 rotation, inner ring rotation and make ball rotation.While rotating with eccentric shaft 72 direct contacts with the inner peripheral surface of retaining hole 55, compare, the friction producing between upper and lower conveying arm 51 and eccentric shaft support 70 is less.The friction producing between upper and lower conveying arm 51 and eccentric shaft support 70 diminishes because of ball bearing 60, and conveying arm 51, without do very greatly in order to keep intensity, can be realized lightweight up and down.Therefore upper and lower conveying arm 51 can improve the servo-actuated property of the driving of 27 pairs of main motors 13 of upper and lower conveying axis.By flanged screw 46 being assembled in the screwed hole (omitting diagram) of eccentric shaft 72, screw 46 is fixed on eccentric shaft 72 by ball bearing 60 location.
With reference to Fig. 6, Fig. 7, the relation between the adjusting of the offset in eccentric stiffener portion 40 and the movement locus of cloth pushing table 33 is described.Eccentric shaft support 70 can rotate centered by the turning cylinder 73 in the fixing hole 85 that is inserted into base portion 80.From the end on observation of upper and lower conveying axis 27, axle fixing hole 84 center, eccentric shaft 72 center, fixing hole 85(turning cylinder 73) center be respectively P1, P2, P3.Eccentric shaft support 70 shown in Fig. 6 is in the first state.The first state is that the center P 2 of eccentric shaft 72 is positioned at the state on the straight line that links P1 and P3.P2 approaches P1 most.Distance Q1 between P1-P2 is the minimum range in eccentric stiffener portion 40, and the offset in eccentric stiffener portion 40 is minimum.The movement locus K1 of cloth conveying teeth 34 when the offset of eccentric stiffener portion 40 is adjusted into Q1 is as shown in the arrow downside of Fig. 6.Movement locus K1 is at the substantially elliptical shape that is up and down horizontal length of the plate face position of needle plate 15 (H in figure).Cloth conveying teeth 34 is work feed when movement locus K1 is positioned at the position than the top side of plate face of needle plate 15.
Eccentric shaft support 70 shown in Fig. 7 is in the second state.The second state is that the center P 2 of eccentric shaft 72 is away from the state of the straight line of link P1 and P3.In the second state, eccentric shaft support 70 has rotated for example about 10 ° around counterclockwise (among Fig. 7) from the first state shown in Fig. 6 centered by P3.Compare with the first state, eccentric shaft 72 is positioned at the position away from upper and lower conveying axis 27.Distance Q2 between P1-P2 is longer than the distance Q1 between the P1-P2 of the first state.Offset in eccentric stiffener portion 40 is larger than the offset of the first state.The movement locus K2 of cloth conveying teeth 34 when the offset of eccentric stiffener portion 40 is adjusted into Q2 is as shown in the arrow downside of Fig. 7.Movement locus K2 compares with movement locus K1, is at above-below direction and heaves larger substantially elliptical shape.Compare with the first state, the amount of movement of the above-below direction of cloth conveying teeth 34 increases.Therefore, operator rotates centered by the turning cylinder 73 of eccentric shaft support 70 in the fixing hole 85 that is inserted into base portion 80 by making, and easily eccentric adjustment axle 72 is with respect to the offset of upper and lower conveying axis 27.The turning cylinder 73 of eccentric shaft support 70 is examples for axial region of the present invention.The axle support 82 of base portion 80 is examples for axle support of the present invention.The axle fixed part 83 of base portion 80 is examples for fixed part of the present invention.
As mentioned above, the Sewing machines 1 of present embodiment has cloth feeding mechanism 30.Cloth feeding mechanism 30 has upper and lower conveying mechanism 26.Upper and lower conveying mechanism 26 moves up and down cloth pushing table 33.Upper and lower conveying mechanism 26 has eccentric stiffener portion 40.Eccentric stiffener portion 40 has eccentric shaft support 70 and base portion 80.Eccentric shaft support 70 has eccentric shaft 72 and turning cylinder 73.Base portion 80 has axle fixing hole 84 and fixing hole 85.Upper and lower conveying axis 27 inserts in axle fixing holes 84 and fixes.Turning cylinder 73 is supported on fixing hole 85 in the mode that can rotate.Eccentric shaft support 70 can rotate centered by the turning cylinder 73 that is supported on fixing hole 85.27 bias of conveying axis up and down that eccentric shaft 72 is fixing with respect to being inserted into axle fixing hole 84.Operator can make eccentric shaft support 70 rotate, and changes the center P 1 of axle fixing hole 84 and the distance between the center P 2 of eccentric shaft 72.Distance between P1-P2 is easily confirmed and is easy to regulate.Operator easily eccentric adjustment axle 72 with respect to the offset of upper and lower conveying axis 27.Therefore operator can regulate the round amount of movement of the above-below direction of cloth conveying teeth simply.
And in the present embodiment, base portion 80 has fixing hole 85 on axle support 82.Axle support 82 has locking slot 86.By making the narrowed width of locking slot 86, the inner peripheral surface of axle support 82 is closely attached on the outer peripheral face of turning cylinder 73.Therefore Sewing machines 1 can be fixing reliably in the mode that cannot rotate with respect to axle support 82 by turning cylinder 73.
And in the present embodiment, upper and lower conveying arm 51 utilizes ball bearing 60 to keep an end of eccentric shaft 72 in the mode that can rotate.The friction producing between upper and lower conveying arm 51 and eccentric shaft support 70 diminishes because of ball bearing 60, and conveying arm 51, without do very greatly in order to keep intensity, can be realized lightweight up and down.Therefore Sewing machines 1 can improve the servo-actuated property of the driving that makes 27 pairs of main motors 13 of conveying axis up and down that upper and lower conveying arm 51 moves up and down.
The present invention is not limited to above-mentioned embodiment, can carry out various distortion.In the above-described embodiment, in eccentric stiffener portion 40, eccentric shaft support 70 rotates with respect to base portion 80.Operator changes the distance between the center P 1 of axle fixing hole 84 and the center P 2 of eccentric shaft 72 by eccentric shaft support 70 is rotated, and freely eccentric adjustment axle 72 is with respect to the offset of upper and lower conveying axis 27.For example eccentric stiffener portion 40 can be the structure that eccentric shaft support 70 can be adjusted to the offset of selecting the gear (pattern) of the offset from regulating reliably.
With reference to Fig. 8～Figure 10, eccentric stiffener portion 140 is described.Eccentric stiffener portion 140 is variation of the eccentric stiffener portion 40 of above-mentioned embodiment.Eccentric stiffener portion 140 can be adjusted to the gear of predefined offset reliably.As shown in Figure 9, eccentric stiffener portion 140 has eccentric shaft support 170 and base portion 180.As shown in Figure 8, eccentric shaft support 170 has main part 171, eccentric shaft 172, turning cylinder 173.Main part 171 and eccentric shaft 172 are identical with eccentric shaft 72 with the main part 71 shown in Fig. 5.Turning cylinder 173 has the first tabular surface 176 and the second tabular surface 177 on outer radial periphery face.The second tabular surface 177 is arranged on the position of along the circumferential direction departing from from the end of radially opposition side turning cylinder 173, the first tabular surface 176.The first tabular surface 176 and the second tabular surface 177 are also not parallel each other.
As shown in Figure 9, base portion 180 has pedestal portion 181 and axle support 182.Pedestal portion 181 has axle fixing hole 184.Axle fixing hole 184 is equivalent to the axle fixing hole 84 shown in Fig. 5.One end of upper and lower conveying axis 27 is inserted in axle fixing hole 184 and is fixed.Axle support 182 is arranged in pedestal portion 181, is prism-shaped.Axle support 182 extends abreast with the bearing of trend of pedestal portion 181.Axle support 182 has fixing hole 185.Fixing hole 185 is equivalent to the fixing hole 85 shown in Fig. 5.The turning cylinder 173 of eccentric shaft support 170 inserts in fixing hole 185.
Axle support 182 has 187～side, side 189.187～side, side 189 is parallel with the axis direction of fixing hole 185.Side 187 is perpendicular to the straight line at connection shaft fixing hole 184 center and fixing hole 185 center.Side 188,189 parallel to each other and with side 187 quadratures.187～side, side 189 has respectively screwed hole 201～screwed hole 203.Each screwed hole 201～screwed hole 203 is axially communicated with fixing hole 185 orthogonally with fixing hole 185.
As shown in Figure 9, Figure 10, centered by the turning cylinder 173 of eccentric shaft support 170 in being inserted into fixing hole 185, with respect to base portion 180, rotate.As shown in Figure 9, screw 94 is assembled in the screwed hole 202 of side 188, and the top of screw 94 is connected to the first tabular surface 176.Being centered close on same straight line of fixing hole 185 center, axle fixing hole 184 center and eccentric shaft 172.Eccentric shaft support 170 is in the third state.In the third state, eccentric shaft 172 is minimum with respect to the offset of axle fixing hole 184.Screw 93 is assembled in the screwed hole 201 of side 187.The top of screw 93 is connected to the outer peripheral face of the turning cylinder 173 being inserted in fixing hole 185.Turning cylinder 173 cannot rotate.Eccentric shaft support 170 can keep the third state.In the third state, screw 95 is not assembled in the screwed hole 203 of side 189.
As shown in figure 10, centered by the turning cylinder 173 of eccentric shaft support 170 in being inserted into fixing hole 185 with respect to base portion 180 around being rotated counterclockwise.Screw 95 is assembled in the screwed hole 203 of side 189, and the top of screw 95 is connected to the second tabular surface 177.The misalignment of eccentric shaft 172 links the straight line at fixing hole 185 center and axle fixing hole 184 center.Eccentric shaft support 170 is in the 4th state.In the 4th state, be the position relationship that eccentric shaft 172 is larger than the offset of the third state with respect to the offset of axle fixing hole 184.Screw 93 is assembled in the screwed hole 201 of side 187.The top of screw 93 is connected to the outer peripheral face of the turning cylinder 173 being inserted in fixing hole 185.Turning cylinder 173 cannot rotate.Eccentric shaft support 170 can keep the 4th state.In the 4th state, screw 94 is not assembled in the screwed hole 202 of side 188.
As mentioned above, in this variation, the turning cylinder 173 of eccentric shaft support 170 has the first tabular surface 176 and the second tabular surface 177.Centered by the turning cylinder 173 of eccentric shaft support 170 in being inserted into fixing hole 185, rotate.The first tabular surface 176 or the second tabular surface 177 are connected to the top of screw 94 or screw 95.Therefore eccentric stiffener portion 140 can be adjusted to the gear of predefined offset reliably.The gear of offset is that eccentric shaft 172 is with respect to the gear of the offset of axle fixing hole 184.Operator is without the distance of measuring fixing hole 185 center and eccentric shaft 172 center.And operator can be adjusted to predefined offset exactly, therefore, be also difficult for producing the technical error being caused by operator.In addition, offset can utilize the angle of the angulation between each tabular surface that is arranged on turning cylinder 173 to change.The turning cylinder 173 of this variation has two tabular surfaces, but also can have three above tabular surfaces.When having increased tabular surface, eccentric stiffener portion can change into the gear of more offset.
Horizontal transport agency 25 is not limited to above-mentioned embodiment.For example horizontal transport agency 25 can not utilize work feed motor 62, linkage portion 65 to drive, and utilizes the crank mechanism being connected with the main shaft 14 rotating by the driving of main motor 13 or upper and lower conveying axis 27 to drive.Horizontal transport agency 25 utilizes crank mechanism that horizontal feed axle 28 is rotated in the scope of predetermined angular.Cloth pushing table 33 comes and goes mobile by the rotation within the scope of predetermined angular of horizontal feed axle 28 along the fore-and-aft direction of Sewing machines 1 by means of link component 50.
In the above-described embodiment, upper and lower conveying arm 51 has ball bearing 60 in the part of an end of supporting eccentric shaft 72, but also can have other the bearing such as needle bearing.
In above-mentioned variation, screw 93 is assembled in the screwed hole 201 of side 187, and the top of screw 93 is connected to the outer peripheral face of turning cylinder 173 and turning cylinder 173 cannot be rotated.It is parallel and pass to the locking slot of side 187 that axle support 182 also can have axis direction with fixing hole 185.Axle support 182 has the screwed hole with this locking slot quadrature, screw is assembled in this screwed hole and makes the inner peripheral surface of fixing hole 185 be closely attached on the outer peripheral face of turning cylinder 173.Turning cylinder 173 can be securely fixed in axle support 182.
Claims (2)
1. a Sewing machines (1), it has:
Cloth pushing table (33), it supports cloth conveying teeth (34);
Upper and lower conveying axis (27), the rotation of itself and main shaft (14) is rotated linkedly;
Eccentric stiffener portion (140), it has by an end of above-mentioned upper and lower conveying axis is inserted wherein fixes the axle fixing hole (184) of above-mentioned upper and lower conveying axis and with respect to the eccentric shaft (172) of the center bias of above-mentioned axle fixing hole; And
Upper and lower conveying arm (51), the end that it supports above-mentioned eccentric shaft, moves up and down above-mentioned cloth pushing table, it is characterized in that,
Above-mentioned eccentric stiffener portion has:
Base portion (180), it has above-mentioned axle fixing hole;
Eccentric shaft support (170), this eccentric shaft support with can make above-mentioned eccentric shaft with respect to the center of above-mentioned axle fixing hole along and the mode that moves of the direction of the axial quadrature of above-mentioned upper and lower conveying axis support above-mentioned eccentric shaft,
Above-mentioned eccentric shaft support has:
Main part (171), its direction along the axial quadrature with above-mentioned eccentric shaft is extended, and at one end portion is extruded with above-mentioned eccentric shaft; And
Axial region (173), it is given prominence to a other end above-mentioned end opposition side and to the contrary direction of the projected direction with above-mentioned eccentric shaft aforementioned body portion,
Above-mentioned axial region has a plurality of pars (176,177) on outer peripheral face,
Said base portion also has the axle support (182) that mode can make above-mentioned axial region rotate supports above-mentioned axial region,
Above-mentioned axle support has:
Fixing hole (185), above-mentioned axial region inserts this fixing hole in a rotatable manner;
The second screwed hole (202,203), this second screwed hole connects towards the outer peripheral face that inserts the above-mentioned axial region of above-mentioned fixing hole (185);
The second screw (94,95), this second screw is by being threadedly engaged with above-mentioned the second screwed hole any being connected in above-mentioned a plurality of par, thereby with respect to above-mentioned axle support, above-mentioned axial region location is fixed in any in a plurality of assigned positions.
2. Sewing machines according to claim 1, is characterized in that,
Above-mentioned upper and lower conveying arm has bearing (60) in the part of an above-mentioned end of the above-mentioned eccentric shaft of supporting.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2011213940A JP2013070919A (en) | 2011-09-29 | 2011-09-29 | Sewing machine |
| JP2011-213940 | 2011-09-29 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103031672A CN103031672A (en) | 2013-04-10 |
| CN103031672B true CN103031672B (en) | 2014-10-01 |
Family
ID=47980962
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201220430094.2U Expired - Lifetime CN202849744U (en) | 2011-09-29 | 2012-08-28 | Sewing machine |
| CN201210365293.4A Active CN103031672B (en) | 2011-09-29 | 2012-09-26 | Sewing machine |
Family Applications Before (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201220430094.2U Expired - Lifetime CN202849744U (en) | 2011-09-29 | 2012-08-28 | Sewing machine |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP2013070919A (en) |
| CN (2) | CN202849744U (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP6361292B2 (en) * | 2014-05-30 | 2018-07-25 | ブラザー工業株式会社 | sewing machine |
| CN105350186B (en) * | 2015-09-30 | 2018-12-14 | 杰克缝纫机股份有限公司 | Sewing machine feeding mechanism and sewing machine |
| CN105155141B (en) * | 2015-09-30 | 2018-03-02 | 杰克缝纫机股份有限公司 | Dual-motors Driving feed mechanism and sewing machine |
| CN105155142B (en) * | 2015-09-30 | 2017-12-29 | 杰克缝纫机股份有限公司 | Dual-motors Driving feed mechanism and sewing machine |
| CN105113136B (en) * | 2015-09-30 | 2018-03-06 | 杰克缝纫机股份有限公司 | Sewing machine feeding mechanism and sewing machine |
| CN115538048A (en) * | 2022-10-14 | 2022-12-30 | 浙江美机缝纫机有限公司 | Rectangular track feeding mechanism on sewing machine |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4183310A (en) * | 1978-12-21 | 1980-01-15 | The Singer Company | Feed and loop taker module for a sewing machine |
| CN1043794C (en) * | 1996-05-15 | 1999-06-23 | 飞马缝纫制造株式会社 | Sewing machine of cylinder type base board with differential cloth feeding mechanism |
| CN1298973A (en) * | 1999-12-07 | 2001-06-13 | 重机公司 | Feeding device for sewing machine |
| CN102154787A (en) * | 2011-04-07 | 2011-08-17 | 上海富山精密机械科技有限公司 | Dual-motor driven computerized sewing machine |
-
2011
- 2011-09-29 JP JP2011213940A patent/JP2013070919A/en not_active Withdrawn
-
2012
- 2012-08-28 CN CN201220430094.2U patent/CN202849744U/en not_active Expired - Lifetime
- 2012-09-26 CN CN201210365293.4A patent/CN103031672B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4183310A (en) * | 1978-12-21 | 1980-01-15 | The Singer Company | Feed and loop taker module for a sewing machine |
| CN1043794C (en) * | 1996-05-15 | 1999-06-23 | 飞马缝纫制造株式会社 | Sewing machine of cylinder type base board with differential cloth feeding mechanism |
| CN1298973A (en) * | 1999-12-07 | 2001-06-13 | 重机公司 | Feeding device for sewing machine |
| CN102154787A (en) * | 2011-04-07 | 2011-08-17 | 上海富山精密机械科技有限公司 | Dual-motor driven computerized sewing machine |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2013070919A (en) | 2013-04-22 |
| CN202849744U (en) | 2013-04-03 |
| CN103031672A (en) | 2013-04-10 |
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