CN103031672A - Sewing machine - Google Patents

Sewing machine Download PDF

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Publication number
CN103031672A
CN103031672A CN2012103652934A CN201210365293A CN103031672A CN 103031672 A CN103031672 A CN 103031672A CN 2012103652934 A CN2012103652934 A CN 2012103652934A CN 201210365293 A CN201210365293 A CN 201210365293A CN 103031672 A CN103031672 A CN 103031672A
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CN
China
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mentioned
eccentric shaft
conveying
eccentric
axle
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Granted
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CN2012103652934A
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Chinese (zh)
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CN103031672B (en
Inventor
加藤雅史
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Brother Industries Ltd
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Brother Industries Ltd
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Priority to JP2011-213940 priority Critical
Priority to JP2011213940A priority patent/JP2013070919A/en
Application filed by Brother Industries Ltd filed Critical Brother Industries Ltd
Publication of CN103031672A publication Critical patent/CN103031672A/en
Application granted granted Critical
Publication of CN103031672B publication Critical patent/CN103031672B/en
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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

Sewing machines
Technical field
The present invention relates to a kind of Sewing machines with 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 the cloth conveying teeth work feed.Change according to the momental variation of the conveying of above-below direction the period of work feed.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 the cloth of making, thickness changed, the track of the substantially elliptical that the operator need to be by changing cloth conveying teeth changed the conveying amount of exercise, and made the tightness etc. of line corresponding with sewing condition.For example the cloth-feeding device of the Japan special permission No. 162076 disclosed Sewing machiness of communique of open calendar year 2001 makes with the lower end eccentric cam movingly of conveying arm up and down and is two eccentric cam structures.The peak exercise of the above-below direction of cloth conveying teeth is variable.Two eccentric cam structures are eccentric at two places.The operator need to calculate whole offset by considering the offset on each eccentric position.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; Conveying axis up and down, the rotation of itself and main shaft is rotated linkedly; Eccentric stiffener section, its have by an end of above-mentioned up and down conveying axis is inserted wherein fix above-mentioned about conveying axis the axle fixing hole and with respect to the eccentric shaft of the center off-centre of above-mentioned axle fixing hole; And conveying arm up and down, it supports an end of above-mentioned eccentric shaft, above-mentioned cloth pushing table is moved up and down, wherein, above-mentioned eccentric stiffener section has the eccentric shaft support, and this eccentric shaft support is can make above-mentioned eccentric shaft support above-mentioned eccentric shaft with respect to the center of above-mentioned axle fixing hole along the mode that moves with the above-mentioned up and down direction of the axial quadrature of conveying axis.The eccentric shaft support supports eccentric shaft in the mode that can make eccentric shaft and move with respect to the up and down conveying axis that is fixed in the axle fixing hole.Therefore Sewing machines freely the eccentric adjustment axle with respect to the offset of conveying axis up and down.Therefore the 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 extend with a direction of the axial quadrature of above-mentioned eccentric shaft on its edge, and at one end section 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 direction opposite with the projected direction of above-mentioned eccentric shaft aforementioned body section, above-mentioned eccentric stiffener section also has: the axle support, and it supports above-mentioned axial region in the mode that above-mentioned axial region is rotated; And fixed part, its with above-mentioned axial region being fixed in above-mentioned axle support with respect to the mode that above-mentioned axle support rotates.Axial region supports in the mode that axial region is rotated in eccentric stiffener section on the axle support.The eccentric shaft support rotates centered by axial region.Eccentric shaft is with respect to the up and down position change of conveying axis.Therefore the Sewing machines offset of eccentric adjustment axle freely.And fixed part can be with axial region being fixed in above-mentioned axle support with respect to the mode that the axle support rotates.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, it extends to above-mentioned fixed part along the Axis Extension of above-mentioned cylinder and from above-mentioned inner peripheral surface, above-mentioned fixed part has: the first screwed hole, its along with the direction setting of the bearing of trend quadrature of above-mentioned locking slot, connect above-mentioned locking slot; And first screw, it connects above-mentioned locking slot by being threadedly engaged with above-mentioned the first screwed hole, thereby make the narrowed width of above-mentioned locking slot, be threadedly engaged with the narrowed width that makes above-mentioned locking slot by above-mentioned the first screw and above-mentioned the first screwed hole, 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 can't rotate above-mentioned axial region is fixed.The 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 with axial region being fixed in above-mentioned axle support with respect to the mode that the axle support rotates.
In the Sewing machines of technical scheme 4, above-mentioned axial region has at least one par at 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 connected to above-mentioned par by being threadedly engaged with above-mentioned the second screwed hole, thereby with respect to above-mentioned axle support above-mentioned axial region location is fixed on the assigned position.The par for example is parallel to the cross section that the axial region gained is removed to cut in the axial plane of axial region for using.The second screw is assembled in the second screwed hole that is arranged at the axle support.The top of the second screw contacts with the par.Therefore fixed part can easily be fixed on the axial region location on the assigned position with respect to the axle support.
In the Sewing machines of technical scheme 5, the part of above-mentioned up and down conveying arm in an above-mentioned end of the above-mentioned eccentric shaft of supporting has bearing.Diminish because of bearing in the friction that produces between conveying arm and the eccentric shaft support up and down, conveying arm need not to do very greatly in order to keep intensity up and down, can realize lightweight.Therefore Sewing machines can improve and makes up and down conveying axis that conveying arm up and down moves up and down to the servo-actuated property of the driving of main motor.
Description of drawings
Fig. 1 is the stereogram of Sewing machines 1.
Fig. 2 is near the amplification stereogram sewing needle 8 and the needle plate 15.
Fig. 3 is the stereogram of cloth feeding mechanism 30.
Fig. 4 is the exploded perspective view of conveying mechanism 26 up and down.
Fig. 5 is the exploded perspective view of eccentric stiffener section 40.
Fig. 6 is the figure of position relationship of the first state of expression eccentric stiffener section 40.
Fig. 7 is the figure of position relationship of the second state of expression eccentric stiffener section 40.
Fig. 8 is the stereogram of eccentric shaft support 170.
Fig. 9 is the figure of position relationship of the third state of expression eccentric stiffener section 140.
Figure 10 is the figure of position relationship of the 4th state of expression eccentric stiffener section 140.
The specific embodiment
With reference to the description of drawings 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 section 2, column sections 3, horn section 4.Support section 2 is pedestals of Sewing machines 1.Support section 2 is installed on the recess (omitting diagram) of the upper surface of workbench 20 from the top.Column sections 3 is extended to vertical top from the right-hand member of support section 2.Horn section 4 extends to left from the upper end of column sections 3, and is relative with the upper surface of support section 2.Horn section 4 is equipped with presser feet 17 below the left part.Horn section 4 maintains shank 7 in inside, shank 7 is equipped with sewing needle 8(with reference to Fig. 2 in the lower end).Shank 7 is mobile up and down along with the driving of main motor 13 with sewing needle 8.Horn section 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 section 4 has operating portion 10 on top, operating portion 10 has liquid crystal panel 11 at front surface.The operator is while seeing liquid crystal panel 11 operating operation sections 10, with 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.The operator is to rear side or front side operating pedal 22.Control device 29 is according to the action of direction of operating and the operational ton control Sewing machines 1 of pedal 22.Column sections 3 has main motor 13 on right flank top.Horn section 4 has main shaft 14 in inside, state in the horn section 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 section 2 has needle plate 15 at the upper surface left end, and needle plate 15 has pin hole 18 in substantial middle section.Pin hole 18 is passed through in the lower end of sewing needle 8 when descending.Needle plate 15 respectively at the left of pin hole 18, the place ahead, rear, right-handly have a work feed perforation 19.Work feed perforation 19 is rectangular shape long on fore-and-aft direction.Support section 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, conveying mechanism 26 etc. up and down.Cloth pushing table 33 is positioned at needle plate 15(with reference to Fig. 2) the 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 concavo-convex for clamping 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 section 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 section 65 has effect arm 68, the first arm 66, the second arm 67.One of the first arm 66 is rectified the top of handing over the driving shaft 63 that is installed on work feed motor 62.The other end of the first arm 66 is connected with the mode that can rotate and an end of the second arm 67 by means of linking part 97.The other end of the second arm 67 is connected with the mode that can rotate and an end that acts on arm 68 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 section 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, then linking part 97 comes and goes mobile along the vertical direction.Linking part 96 is by the mobile interlock of the second arm 67 with linking part 97, 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, then 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 conveying mechanism 26 about Fig. 4 explanation.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 up and down conveying mechanism 26.Conveying mechanism 26 has up and down conveying axis 27, eccentric stiffener section 40, ball bearing 60, conveying arm 51 etc. up and down up and down.Conveying axis 27 is parallel with horizontal feed axle 28 up and down.Conveying axis 27 is supported on support section 2 in the mode that can rotate up and down.Conveying axis 27 has belt wheel 24(with reference to Fig. 3 in the right part up and down).Belt wheel 24 by means of Timing Belt (omit diagram) and main shaft 14(with reference to Fig. 1) be connected.Conveying axis 27 is driven by main motor 13 and rotates by means of being attached at Timing Belt on the main shaft 14 up and down.Therefore the main shaft 14 of conveying axis 27 and Sewing machines 1 synchronously rotates up and down.Eccentric stiffener section 40 is arranged on the up and down left end of conveying axis 27.Eccentric stiffener section 40 has eccentric shaft 72.Eccentric shaft 72 is eccentric with respect to the axle center of conveying axis 27 up and down.The detailed content of eccentric stiffener section 40 and eccentric shaft 72 will be described hereinafter.Conveying arm 51 is connected with the axle support 35 of cloth pushing table 33 up and down.Axle support 35 is arranged on the rearward end of cloth pushing table 33.Up and down conveying arm 51 by means of ball bearing 60 described later so that the mode that the eccentric shaft 72 of eccentric stiffener section 40 can rotate keeps this eccentric shaft 72.Eccentric stiffener section 40 is accompanied by the rotation of conveying axis 27 up and down and rotates.Eccentric shaft 72 rotates while moving up and down by the rotation of eccentric stiffener section 40, and therefore, conveying arm 51 moves up and down up and down.Therefore conveying mechanism 26 can make cloth pushing table 33 move up and down up and down.
Structure with reference to conveying arm 51 about Fig. 4 explanation.Conveying arm 51 is roughly cylindric up and down.Conveying arm 51 has retaining hole 55, erecting bed 52, installation portion 53, axle fixed part 54 up and down.Retaining hole 55 connects at left and right directions.Retaining hole 55 keeps ball bearing 60 in the inboard.The detailed content of ball bearing 60 will be described hereinafter.Erecting bed 52 is arranged on the outer peripheral face of conveying arm 51 up and down.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 the through hole 35A of the axle support 35 that is arranged on cloth pushing table 33.Steady pin 45 inserts in through hole 35A and the installing hole 56.Screw 47 is assembled in the 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 the installation portion 53.Cloth pushing table 33 can rotate with respect to steady pin 45.Cloth pushing table 33 and conveying arm 51 is connected to each other up and down.
The structure of eccentric stiffener section 40 is described with reference to Fig. 5.Eccentric stiffener section 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 conveying axis 27(up and down) the relative face of side.One surperficial 71A and another surperficial 71B are the 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 for example is.
Base portion 80 is described.Base portion 80 has pedestal section 81, axle support 82, axle fixed part 83.It is cylindric that pedestal section 81 is part, with conveying axis 27(up and down with reference to Fig. 4) axially parallel ground extend.Pedestal section 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 the part periphery.Other end 81C is the face of a side opposite with an end face 81A, is the face relative with conveying axis 27 sides up and down.Pedestal section 81 has axle fixing hole 84.Axle fixing hole 84 is along the axial perforation of pedestal section 81.An end of conveying axis 27 inserts the axle fixing hole 84 from other end 81C side up and down.As shown in Figure 6, pedestal section 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 orthogonally respectively.Pedestal section 81 is assembled in screw 91,92 among screwed hole 81D, the 81E.Screw 91,92 is connected to an end of the up and down conveying axis 27 that is inserted into axle fixing hole 84.Conveying axis 27 is fixed on the base portion 80 up and down.Base portion 80 is rotated integratedly with conveying axis 27 up and down.
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 section 81.Axle support 82 has fixing hole 85.The turning cylinder 73 of eccentric shaft support 70 inserts in the 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 from the observation of 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, fixedly is inserted into the turning cylinder 73 in the fixing hole 85 of axle support 82.
The assemble method of eccentric stiffener section 40 is described.Another surperficial 71B of the main part 71 of operator and eccentric shaft support 70 relatively disposes an end face 81A of base portion 80, and the turning cylinder 73 of eccentric shaft support 70 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.The operator is by rotating eccentric shaft support 70, can eccentric adjustment axle 72 with respect to the offset of conveying axis 27 up and down.The control method of offset will be described hereinafter.The 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 the axle support 82.Eccentric shaft support 70 is fixed on the base portion 80.40 assemblings of eccentric stiffener section are complete.
With reference to Fig. 4 eccentric stiffener section 40 and the connecting structure of conveying arm 51 up and down are described.Conveying arm 51 inserts ball bearing 60 and keeps ball bearing 60 in the retaining hole 55 up and down.Ball bearing 60 for example is to utilize outer ring and inner ring to surround ball, comes 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, then inner ring rotation and make the ball rotation.Compare when rotating with eccentric shaft 72 direct contacts with the inner peripheral surface of retaining hole 55, less in the friction that produces between conveying arm 51 and the eccentric shaft support 70 up and down.Diminish because of ball bearing 60 in the friction that produces between conveying arm 51 and the eccentric shaft support 70 up and down, conveying arm 51 need not to do very greatly in order to keep intensity up and down, can realize lightweight.Therefore conveying arm 51 can improve the up and down servo-actuated property of the driving of 27 pairs of main motors 13 of conveying axis up and down.In the screwed hole (omitting diagram) that flanged screw 46 is assembled in eccentric shaft 72, screw 46 is fixed in eccentric shaft 72 with ball bearing 60 location.
Relation between the movement locus of the adjusting of the offset in the eccentric stiffener section 40 and cloth pushing table 33 is described with reference to Fig. 6, Fig. 7.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 conveying axis 27 up and down, the center of the center of axle fixing hole 84, eccentric shaft 72, fixing hole 85(turning cylinder 73) the center be respectively P1, P2, P3.Eccentric shaft support 70 shown in Figure 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 is near P1.Between P1-P2 is minimum range in the eccentric stiffener section 40 apart from Q1, and the offset in the eccentric stiffener section 40 is minimum.The movement locus K1 of cloth conveying teeth 34 when the offset with eccentric stiffener section 40 is adjusted into Q1 is 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 among the figure).Work feed when cloth conveying teeth 34 is positioned at position than the top side of plate face of needle plate 15 at movement locus K1.
Eccentric shaft support 70 shown in Figure 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 that links 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 Figure 6 centered by P3.Compare with the first state, eccentric shaft 72 is positioned at away from the position of conveying axis 27 up and down.Between P1-P2 apart from long apart from Q1 than between the P1-P2 of the first state of Q2.Offset in the eccentric stiffener section 40 is larger than the offset of the first state.The movement locus K2 of cloth conveying teeth 34 when the offset with eccentric stiffener section 40 is adjusted into Q2 is shown in the arrow downside of Fig. 7.Movement locus K2 compares with movement locus K1, is at above-below direction to heave 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, the operator rotates by making centered by the turning cylinder 73 of eccentric shaft support 70 in the fixing hole 85 that is inserted into base portion 80, and easily eccentric adjustment axle 72 is with respect to the offset of conveying axis 27 up and down.The turning cylinder 73 of eccentric shaft support 70 is examples of axial region of the present invention.The axle support 82 of base portion 80 is examples of axle support of the present invention.The axle fixed part 83 of base portion 80 is examples of 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 up and down conveying mechanism 26.Conveying mechanism 26 moves up and down cloth pushing table 33 up and down.Conveying mechanism 26 has eccentric stiffener section 40 up and down.Eccentric stiffener section 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.Conveying axis 27 inserts in the axle fixing holes 84 and fixes up and down.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.Up and down conveying axis 27 off-centre that eccentric shaft 72 is fixing with respect to being inserted into axle fixing hole 84.The operator can make eccentric shaft support 70 rotate, and the distance between the center P 2 of the center P 1 of change axle fixing hole 84 and eccentric shaft 72.Distance between P1-P2 is confirmed and is easy to regulate easily.The operator easily eccentric adjustment axle 72 with respect to the offset of conveying axis 27 up and down.Therefore the 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 at 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 with turning cylinder 73 fixing with respect to the mode that axle support 82 rotates reliably.
And in the present embodiment, conveying arm 51 utilizes ball bearing 60 to keep an end of eccentric shaft 72 in the mode that can rotate up and down.Diminish because of ball bearing 60 in the friction that produces between conveying arm 51 and the eccentric shaft support 70 up and down, conveying arm 51 need not to do very greatly in order to keep intensity up and down, can realize lightweight.Therefore Sewing machines 1 can improve the servo-actuated property of the driving that makes 27 pairs of main motors 13 of up and down conveying axis that conveying arm 51 up and down 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 section 40, eccentric shaft support 70 rotates with respect to base portion 80.The operator is by the distance between the center P 2 of the center P 1 that eccentric shaft support 70 rotated change axle fixing hole 84 and eccentric shaft 72, freely eccentric adjustment axle 72 with respect to about the offset of conveying axis 27.For example eccentric stiffener section 40 can be eccentric shaft support 70 can be adjusted to the offset of selecting reliably from the gear (pattern) of the offset that can regulate structure.
With reference to Fig. 8~Figure 10 eccentric stiffener section 140 is described.Eccentric stiffener section 140 is variation of the eccentric stiffener section 40 of above-mentioned embodiment.Eccentric stiffener section 140 can be adjusted to the gear of predefined offset reliably.As shown in Figure 9, eccentric stiffener section 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 is identical with eccentric shaft 72 with main part 71 shown in Figure 5 with eccentric shaft 172.Turning cylinder 173 has the first tabular surface 176 and the second tabular surface 177 at the 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 section 181 and axle support 182.Pedestal section 181 has axle fixing hole 184.Axle fixing hole 184 is equivalent to axle fixing hole 84 shown in Figure 5.An end of conveying axis 27 inserts in the axle fixing hole 184 and fixes up and down.Axle support 182 is arranged in the pedestal section 181, is prism-shaped.Axle support 182 extends abreast with the bearing of trend of pedestal section 181.Axle support 182 has fixing hole 185.Fixing hole 185 is equivalent to fixing hole shown in Figure 5 85.The turning cylinder 173 of eccentric shaft support 170 inserts in the 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 the center of the center of connection shaft fixing hole 184 and fixing hole 185.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 axially is communicated with fixing hole 185 orthogonally with fixing hole 185.
Such as Fig. 9, shown in Figure 10, rotate with respect to base portion 180 centered by the turning cylinder 173 of eccentric shaft support 170 in being inserted into fixing hole 185.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 the same straight line of the center of the center of fixing hole 185, axle fixing hole 184 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 that is inserted in the fixing hole 185.Turning cylinder 173 can't 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 straight line at the center of the misalignment binding fixing hole 185 of eccentric shaft 172 and the center of axle fixing hole 184.Eccentric shaft support 170 is in the 4th state.In the 4th state, be eccentric shaft 172 position relationship 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 that is inserted in the fixing hole 185.Turning cylinder 173 can't 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.Rotate centered by the turning cylinder 173 of eccentric shaft support 170 in being inserted into fixing hole 185.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 section 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.The operator need not to measure the distance at the center of the center of fixing hole 185 and eccentric shaft 172.And the operator can be adjusted to predefined offset exactly, therefore, also is difficult for producing the technical error that is caused by the 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 section 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 section 65 to drive, and utilize with the main shaft 14 that rotates by the driving of main motor 13 or up and down the crank mechanism that is connected of conveying axis 27 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 in the predetermined angular scope 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, conveying arm 51 has ball bearing 60 in the part of an end of supporting eccentric shaft 72 up and down, 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 can't be rotated.Axle support 182 also can have parallel with the axis direction of fixing hole 185 and pass to the locking slot of side 187.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 the axle support 182.

Claims (5)

1. a Sewing machines (1), it has:
Cloth pushing table (33), it supports cloth conveying teeth (34);
Conveying axis (27) up and down, the rotation of itself and main shaft (14) is rotated linkedly;
Eccentric stiffener section (40,140), its have by an end of above-mentioned up and down conveying axis is inserted wherein fix above-mentioned about conveying axis axle fixing hole (84,184) and with respect to the eccentric shaft (72,172) of the center off-centre of above-mentioned axle fixing hole; And
Conveying arm (51) up and down, 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 section has eccentric shaft support (70,170), and this eccentric shaft support is can make above-mentioned eccentric shaft support above-mentioned eccentric shaft with respect to the center of above-mentioned axle fixing hole along the mode that moves with the above-mentioned up and down direction of the axial quadrature of conveying axis.
2. Sewing machines according to claim 1 is characterized in that,
Above-mentioned eccentric shaft support has:
Main part (71,171), extend with a direction of the axial quadrature of above-mentioned eccentric shaft on its edge, and at one end section is extruded with above-mentioned eccentric shaft; And
Axial region (73,173), it is given prominence to a other end above-mentioned end opposition side and to the direction opposite with the projected direction of above-mentioned eccentric shaft aforementioned body section,
Above-mentioned eccentric stiffener section also has:
Axle support (82,182), it supports above-mentioned axial region in the mode that above-mentioned axial region is rotated; And
Fixed part (83,183), its with above-mentioned axial region being fixed in above-mentioned axle support with respect to the mode that above-mentioned axle support rotates.
3. Sewing machines according to claim 2 is characterized in that,
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 (86), it extends to above-mentioned fixed part along the Axis Extension of above-mentioned cylinder and from above-mentioned inner peripheral surface,
Above-mentioned fixed part has:
The first screwed hole (87), its along with the direction setting of the bearing of trend quadrature of above-mentioned locking slot, connect above-mentioned locking slot; And
The first screw (90), it connects above-mentioned locking slot by being threadedly engaged with above-mentioned the first screwed hole, thereby makes the narrowed width of above-mentioned locking slot,
Be threadedly engaged with the narrowed width that makes above-mentioned locking slot by above-mentioned the first screw and above-mentioned the first screwed hole, 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 can't rotate above-mentioned axial region is fixed.
4. Sewing machines according to claim 2 is characterized in that,
Above-mentioned axial region has at least one par (176,177) at outer peripheral face,
Above-mentioned axle support has the second screwed hole (202,203) towards the outer peripheral face perforation of above-mentioned axial region,
Above-mentioned fixed part has the second screw (94,95), and this second screw is connected to above-mentioned par by being threadedly engaged with above-mentioned the second screwed hole, thereby with respect to above-mentioned axle support above-mentioned axial region location is fixed on the assigned position.
5. the described Sewing machines of any one in 4 according to claim 1 is characterized in that,
The part of above-mentioned up and down conveying arm in an above-mentioned end of the above-mentioned eccentric shaft of supporting has bearing (60).
CN201210365293.4A 2011-09-29 2012-09-26 Sewing machine Active CN103031672B (en)

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Cited By (3)

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Publication number Priority date Publication date Assignee Title
CN105113136A (en) * 2015-09-30 2015-12-02 杰克缝纫机股份有限公司 Feed mechanism of sewing machine and sewing machine
CN105155142A (en) * 2015-09-30 2015-12-16 杰克缝纫机股份有限公司 Double-motor drive feed mechanism and sewing machine
CN105350186A (en) * 2015-09-30 2016-02-24 杰克缝纫机股份有限公司 Sewing machine feeding mechanism and sewing machine

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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
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

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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

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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

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105113136A (en) * 2015-09-30 2015-12-02 杰克缝纫机股份有限公司 Feed mechanism of sewing machine and sewing machine
CN105155142A (en) * 2015-09-30 2015-12-16 杰克缝纫机股份有限公司 Double-motor drive feed mechanism and sewing machine
CN105350186A (en) * 2015-09-30 2016-02-24 杰克缝纫机股份有限公司 Sewing machine feeding 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
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

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