CN101104987A - Horizontal kettle for sewing machine - Google Patents

Abstract

The present invention can increase the penetrability of the closing thread when penetrates the middle kettle and the needle plate to realize the increasing of the sewing quality. The horizontal kettle (1) is provided with the following components: a middle kettle (60) which accommodates the bobbin which supplies lower thread when the sewing machine is sewing; an exterior kettle (70) which is rotated and driven relative to the middle kettle, and makes the upper thread loop traverse the middle kettle by the top end (71) arranged at the periphery; and a thread leading device (10) which is synchronous to the up-and-down movement of the sewing needle and pulls the middle kettle (60) to the direction that the downstream side part of the middle kettle bulge (61) along the rotation direction of the exterior kettle departs from the needle plate bulge (81). Furthermore, the invention adopts the structure which increases the friction between the middle kettle and the exterior kettle by arranging permanent magnet (90) along the periphery of the exterior kettle. Therefore the middle kettle and the exterior kettle can move to the downstream side of the rotation direction when the thread leading device pulls the middle kettle and the front end of the thread leading device separates from the middle kettle to ensure the abundant clearance for the passing of the upper thread.

Description

The horizontal still of Sewing machines

Technical field

The present invention relates to a kind of have allow the horizontal still of Sewing machines of line device (opener).

Background technology

The horizontal still 201 of existing sewing machine has: outer still 270, and it has tip 271, and the wire loop of reaching the standard grade that is formed by suture needle is caught by being the center rotation with the vertical axis in this tip 271 below needle plate 280; And middle still 260, it is maintained at the top of this outer still 270, takes in the bobbin of supplying under thread simultaneously.In the middle still projection 261 of outer rim place, the top of middle still 260 setting towards the radial direction outside, still projection 261 movably embeds between 2 the needle plate projectioies 281,282 that are formed at needle plate 280 lower face side in this.And, take following structure, promptly, if make the outer still 270 that links with lower shaft via still axle 272, rotate along with the rotation of this lower shaft, then by and be arranged on friction between the sliding surface on interior week of this outer still 270, to middle still 260 effects with outside the revolving force of direction of rotation equidirectional of still 270, but by making above-mentioned middle still projection 261 and needle plate projection 281 butts that are positioned at its direction of rotation downstream, the rotation (with reference to Fig. 7) of still 260 in preventing.

In addition, twine and the formation stitching in order to make to reach the standard grade and roll off the production line, need make reaches the standard grade therefrom passes through between 261 and 2 needle plate projectioies 281,282 of still projection.Therefore, in the horizontal still 201 of Sewing machines, be provided with and allow line device 210, it is with the regulation timing synchronous with moving up and down of Sewing machines, and still 260 forms the gap to the counter-rotating of direction of rotation upstream side in making between the needle plate projection 281 in middle still projection 261 and direction of rotation downstream.

The described line device 210 that allows, constitute 4 sections connecting rods by the eccentric cam 231 on the still axle 272 that is arranged on outer still 270, middle still guiding wrist 232, middle still guide link 233 and connecting rod pivot pin 234, by make be installed in the front end 211 that allows line device 210 on the still guiding wrist 232, abutting part 266 effects at the outer rim place, top of still 260 in being arranged on, during every seam one pin, between middle still 260 and needle plate 280, be formed for making the gap (for example, referring to Patent Document 1) of reaching the standard grade and passing through.

Patent documentation 1: the spy opens flat 11-114264 communique

Summary of the invention

But, in the horizontal still 201 of above-mentioned patent documentation 1 disclosed Sewing machines, by allow line device 210 make in still 260 along outside after the counter-rotation of still 270 direction of rotation, because the friction of still 260 and outer still 270 in being somebody's turn to do, even still projection 261 is in the timing that should return the direction of rotation downstream in making, also can be owing to middle still 260 its own inertial power, and continue to be stuck in upstream side as shown in Figure 8, can't between the needle plate projection 282 of middle still projection 261 and its direction of rotation upstream side, guarantee sufficient gap.Therefore, can't make reaches the standard grade successfully therefrom passes through between still projection 261 and the needle plate projection 281,282, and this problem becomes the reason of poor stitching quality.

The objective of the invention is to, the trafficability characteristic that suture is passed through between middle still and the needle plate improves, and realizes the raising of quality of sewing.

In order to address the above problem, the invention that technical scheme 1 is recorded and narrated is a kind of horizontal still of Sewing machines, it is characterized in that having: outer still (70), and it has the tip, and the wire loop of reaching the standard grade that is formed by suture needle is caught by rotation in this tip; In still (60), it is configured in the above-mentioned outer still, has lug boss simultaneously, this lug boss is entrenched in by activity in the fitting portion that is arranged on the needle plate lower surface, self the rotating of rotation of above-mentioned outer still followed in restriction; Allow line device (10), the moving up and down synchronously of itself and above-mentioned suture needle, periodically will above-mentioned middle still pull to still direction of rotation downstream part and above-mentioned telescoping part outside the edge that makes above-mentioned lug boss from direction; And magnet (90,190), it is used for above-mentioned still interior all side draughts of still outside above-mentioned attached.

The invention that technical scheme 2 is recorded and narrated is characterised in that, in the invention that technical scheme 1 is recorded and narrated, has and connects the structure of disembarking (191), and it is corresponding with the centrifugal force increase of following above-mentioned outer still to rotate, makes magnet approaching to middle still.

The effect of invention

Invention according to technical scheme 1 is recorded and narrated utilizes magnet, can interior all side draughts of the outside still of middle still is attached.Thus, the frictional force in can improving between still and the outer still, still and outer still move to the direction of rotation downstream together in making.Therefore, utilization allow the line device and outside the edge at the lug boss of middle still still direction of rotation downstream part and be arranged on form the gap between the fitting portion of needle plate lower surface after, can outside the edge of this lug boss, partly and between the fitting portion of needle plate lower surface guarantee the gap by still direction of rotation upstream side, waltz through so that reach the standard grade.Its result can realize the raising of quality of sewing.

Invention according to technical scheme 2 is recorded and narrated except accessing the effect identical with the invention of technical scheme 1 record, especially, utilizes to connect the structure of disembarking, can be corresponding with the centrifugal force increase of following outer still rotation, and make magnet approaching to middle still.That is, make magnet near middle still owing to the rotary speed along with outer still improves, the absorption affinity in can increasing between still and the outer still improves frictional force between the two.Thus, even still carries out high speed when rotating outside, also can easily make by allowing the line device pull to the middle still of direction of rotation upstream side, the revolving force by outer still returns the direction of rotation downstream.Its result can guarantee the gap that making reaches the standard grade waltzs through, and realizes the stabilisation of quality of sewing.

Description of drawings

Fig. 1 is the plane of the horizontal still of the related Sewing machines of expression present embodiment.

Fig. 2 is the plane of the outer still structure in the expression present embodiment.

Fig. 3 is that expression allows the motion track of leading section of line device be the key diagram of elliptic orbit.

Fig. 4 represents to reach the standard grade in the present embodiment the schematic diagram of the situation by the gap between middle still and the needle plate.

Fig. 5 is the plane that embodiments of the present invention 2 when still low speed rotation (outer) have been used in expression.

Fig. 6 is that the plane of embodiments of the present invention 2 (when outer still rotates at a high speed) has been used in expression.

Fig. 7 is the plane of the horizontal still of expression existing sewing machine.

Fig. 8 is the plane of the horizontal still of expression existing sewing machine.

The specific embodiment

(embodiment 1)

Below, be used to implement best mode of the present invention referring to figs. 1 through Fig. 6 detailed description.In following embodiment, added technical preferred various qualifications, but invention scope is not limited to following embodiment and illustrated example in order to implement the present invention.In addition, in the present embodiment, stipulate the direction of the each several part of the horizontal still of Sewing machines as benchmark with the XYZ axle shown in each figure.Under the state that Sewing machines is arranged on the horizontal plane, Z-direction is represented the above-below direction as vertical, and Y direction is represented the left and right directions consistent with the length direction of Sewing machines arm, X-direction represent level and with the fore-and-aft direction of Y direction quadrature.

(the horizontal still of Sewing machines)

In the present embodiment, be that example describes with the horizontal still that is equipped on the two-needle sewing machine.Two-needle sewing machine is to drive 2 pins up and down and the Sewing machines that forms two parallel stitchings, have respectively with each at 2 horizontal stills of answering, but because their left and right symmetricallies are disposed at the needle downing position both sides of 2 pins, has same structure, so in the present embodiment, for the purpose of simplifying the description and only the horizontal still of a side is illustrated and illustrates.

Fig. 1 is the plane of the horizontal still 1 of the related Sewing machines of present embodiment (below abbreviate horizontal still 1 as), and Fig. 2 is the plane of outer still 70.

As shown in Figure 1, horizontal still 1 has: outer still 70, and it has tip 71, and the wire loop of reaching the standard grade that is formed by suture needle is caught at this tip 71 by rotation; Middle still 60, it is configured in the above-mentioned outer still 70, has middle still projection 61 simultaneously as lug boss, should in the fitting portion that is entrenched in by activity on the lower surface that is arranged at needle plate 80 of still projection 61 be between the needle plate projection 81,82, and the rotation of middle still that above-mentioned outer still 70 rotates 60 self is followed in restriction; Allow line device 10, the moving up and down synchronously of itself and above-mentioned suture needle periodically pulls to middle still 60 direction that still direction of rotation downstream part and needle plate projection 81 are separated outside the edge of still projection 61 in making; And permanent magnet 90, it is the attached magnet of interior all side draughts that is used for still 60 outside stills 70.

Described horizontal still 1 is arranged on the below of the needle plate 80 of Sewing machines, has following function, and promptly when making, the suture needle seizure from the pin hole that inserts feeding tooth 40 is reached the standard grade and formed wire loop, and making simultaneously rolls off the production line penetrates in the wire loop of reaching the standard grade.In addition, horizontal still 1 is under Sewing machines is arranged on state on the horizontal plane, so that the rotation centerline of outer still 70 is installed in the inside of Sewing machines along the mode of direction vertically.Below, describe each several part in detail.

(outer still)

As shown in Figure 2, outer still 70, global shape be for roughly cylindric, serves as that axle is driven in rotation with the center line of this drum.That is, outer still 70, its bottom side are that the center is driven in rotation with still axle 72, on this still axle 72 bottom surface with the fixedly connected still outside 70 of concentric mode by obturation simultaneously.

Still axle 72 is vertical mode so that it is arranged at Sewing machines under the state on the horizontal plane, be supported in the Sewing machines machine frame, machine spindle (omitting diagram) from as the driving shaft that suture needle is moved up and down transmits rotary driving force via the known transmission mechanism with not shown still shaft gear.Described transmission mechanism is with respect to the rotating speed rotation driving still axle 72 of machine spindle with 2 times of speed.That is, make outer still 70 be rotated driving with 2 times the rotating speed that moves up and down frequency of suture needle.

Outside on the outer peripheral face of still 70, be provided with most advanced and sophisticatedly 71 to extending than circumferential slightly laterally direction, the track of the leading section at this tip 71 is set at, depart from slightly the needle downing position by suture needle.Thus, during still 70 rotations outside, can reach the standard grade from the suture needle seizure by most advanced and sophisticated 71.In addition, outer still 70 is provided with direction (clockwise direction among Fig. 1 and Fig. 2) rotation driving by the extension to most advanced and sophisticated 71.

In addition, outside on the inner peripheral surface of still 70, sliding surface (omitting diagram) is set along interior week that should outer still 70, itself and be configured in the outer peripheral face sliding-contact of the interior middle still 60 of this outer still 70 in coaxial mode.

(middle still)

In still 60 so that should in the mode exposed from the top of the opening of outer still 70 of the top of still 60, be accommodated in the inside of outer still 70.

Described middle still 60 is being contained with respect to the mode of outer still 70 rotations, and still projection 61 during the extension of the radial direction of still 60 outside is provided with in this at an upper portion thereof is used for limiting the interlock rotation of still 60 and outer still 70.Relative therewith, in the lower face side of needle plate 80 a pair of needle plate projection 81,82 is set, as with this in the chimeric fitting portion of still projection 61, middle still projection 61 embeds between above-mentioned 2 needle plate projectioies 81,82 in mobilizable mode.The gap that being set to of each needle plate projection 81,82 makes the two is greater than the width of middle still projection 61, the needle plate projection 81 of one side is positioned at the downstream of outer still 70 direction of rotation with respect to middle still projection 61, and the needle plate projection 82 of opposite side is positioned at the upstream side of outer still 70 direction of rotation with respect to middle still projection 61.That is, middle still projection 61 embedded state between a pair of needle plate projection 81,82 in mobilizable mode under, middle still 60 only can be swung accordingly slightly with above-mentioned gap.

In addition, when rotation drives outer still 70, by the sliding surface on the interior week that is formed at this outer still 70, with the outer peripheral face that is somebody's turn to do middle still 60 between friction, to the rotary driving force of middle still 60 transmission from outer still 70.Therefore, in making, except being allowed by aftermentioned line device 10 pulling, middle still projection 61 is all kept the state (state of Fig. 1) with protruding 81 butts of needle plate in the direction of rotation downstream that is positioned at outer still 70.

In addition, have back shaft on the top of middle still 60, its with should in still 60 and outer still 70 rotating shaft coaxle give prominence to setting.On back shaft not shown bobbin can be installed with rotating freely, it is as the supply source that rolls off the production line, and can change.In addition, can freely dismantle ground static line axle casing 65, take in the maintenance bobbin by this bobbin case 65 and middle still 60 at the front end of back shaft.

Abutting part (wing) 66 with bight is set on the outer rim of the top of bobbin case 65, and this bight is flange shape and protrudes to the radial direction outside.Described abutting part 66 at the direction of rotation upstream side of middle still projection 61, is arranged on aftermentioned and allows on the relative position of the leading section 11 of line device 10 as shown in Figure 1.Like this, allow the leading section 11 of line device 10 to abutting part 66 effects, can periodically apply revolving force, the i.e. pulling force of still direction of rotation upstream side outward to middle still 60 by what make that rotation along with machine spindle drives.

(allow line device)

Allow line device 10 be used for the still projection 61 of above-mentioned horizontal still 1 and from outer still direction of rotation downstream and should between the needle plate projection 81 of protruding 61 butts of still, form the gap synchronously and periodically with the rotation of outer still 70.

Describedly allow line device 10 as shown in Figure 1, on the other end of still guiding wrist 32, in this, clasp the eccentric cam 31 that is fixed on the still axle 72 on the end of still guiding wrist 32 in being fixed on.And on the pars intermedia of still guiding wrist 32, the swinging end via pin 37 with middle still guide link 33 links swingably in this, and still guide link 33 is supported in the mode that can swing by middle still guide link axle 34 in this.The described line device 10 that allows is to middle still 60 lateral bucklings, follow the rotation of the eccentric cam 31 of still axle 72 rotations in utilization, by in when still guide link 33 restriction and 32 swings of middle still guiding wrist, with the leading section 11 of middle still abutting part 66 butts as shown in Figure 3, move along oval movement locus.That is, still 60 leading section 11 of still projection 61 when needle plate projection 81 is separated along the opposite spin of outer still direction of rotation (the arrow A direction among Fig. 1) and in making moves along the elliptic orbit D that turns clockwise that centers on identical with the direction of rotation A of outer still 70 in making.

Here, as shown in Figure 3, long on the direction of above-mentioned elliptic orbit D still abutting part 66 in the edge (S＜L).According to this elliptic orbit D as can be known, the speed of leading section 11 can soon with before middle still abutting part 66 butts slowed down to slow state.Therefore, there is not impact sound between leading section 11 and the middle still abutting part 66 substantially.In addition, as shown in Figure 3, because the velocity component when leading section 11 and middle still abutting part 66 butts, the Y direction greater than directions X, thereby can guarantee fully to reach the standard grade through in time between still projection 61 and the latch for printed circuit 82, and suppress the oscillating quantity of middle still 60 less,, can form the stitching of high-quality so can make the tension stability that rolls off the production line.In addition, leading section 11 with middle still abutting part 66 butts after, translational speed to X-direction increases, but with before middle still abutting part 66 separates, slow down once more and be slower speed, so middle still 60 rotates lentamente, thereby can also avoid can not producing big impact sound owing to middle still 60 rotates the middle still projection 61 that causes and the collision between the needle plate projection 82 with sudden force.

In addition, as shown in Figure 3, the line device 10 that allows of the present invention, still 60 rotation in making and making reach the standard grade wire loop by after leading section 11 direction of separating with middle still 60, for roughly along in the direction of still abutting part 66.The still 60 postrotational directions that reset in this means, therefrom still 60 direction of separating is just in time opposite with leading section 11, thus, the resetting easily of middle still 60.

(magnet)

In addition, in the horizontal still 1 of Sewing machines in the present embodiment, the periphery of still 70 is provided with permanent magnet 90 outside above-mentioned.

This permanent magnet 90 has following function, promptly by sliding surface (the omitting diagram) absorption of still 60 outside stills 70 in making, makes the friction increase between the still 60 and outer still 70 in this.That is, permanent magnet 90 by attract from the outside of outer still 70 by magnetic material constitute still 60, still in this 60 is adsorbed on the sliding surface of outer still 70.

In addition, in the present embodiment, described permanent magnet 90 is installed in the following scope of periphery of outer still 70, promptly, from most advanced and sophisticated 71 along outside in about 90～1 80 ° scope of the direction of rotation of still 70, but be not limited to this, if can making from the outside of outer still 70 periphery of still 60 with should outer still 70 in all sliding surface butts, then can be installed in the optional position.

(horizontal still and allow the action specification of line device)

Below, have the action specification of the horizontal still 1 of Sewing machines of said structure.

Horizontal still 1 is when making, with moving up and down synchronously of suture needle, with 2 times of outer stills 70 of speed rotation driving of machine spindle.Thus, outer still 70 rotations, tip 71 is caught from the suture needle that descends and is reached the standard grade.Capture and form reaching the standard grade of wire loop, the below of middle still 60 is passed through at the tip 71 that utilizes rotation to move, thereby passes still 60 in this.

Then, for allowing line device 10, the motion of the arm member 32 by transmission mechanism, this allows the leading section 11 of line device 10 according to elliptic orbit D (with reference to Fig. 3), move along the direction of rotation rotation identical with outer still 70, at the phase place and abutting part 66 butts of regulation, still projection 61 is opened with respect to needle plate projection 81 with the opening that preestablishes adjustment in making, and makes to reach the standard grade betwixt by (with reference to Fig. 4).In addition, if allow the leading section 11 of line device 10 continue to move, then remove the fastening state of itself and abutting part 66.

Here, owing to utilizing the magnetic force of permanent magnet 90, middle still 60 is attracted interior all sides of still 70 outside, if so allow the leading section 11 of line device 10 and the fastening state between the abutting part 60 remove, then in still 60 can follow the outer still 70 of rotation and rotate along the direction (clockwise direction among Fig. 1 and Fig. 3) identical with this outer still 70.Promptly, sufficient frictional force in the utilization between still 60 and the outer still 70, make middle still 60 outside still direction of rotation downstreams, be that arrow A direction (clockwise direction) shown in Figure 1 moves, by the middle still projection 61 that moves with middle still 60 one is moved along this A direction, still projection 61 and be arranged between the needle plate projection 82 of upstream side of needle plate 80 lower surfaces and form the gap in this.Thus, reach the standard grade can waltz through between still projection 61 and the needle plate projection 82, and then by allowing between the leading section 11 and abutting part 66 of line device 10.Thereby making reaches the standard grade fully passes middle still 60, becomes and inserted the state that rolls off the production line in its wire loop.Like this, when each suture needle moves up and down, repeat above-mentioned suture action, make.

(effect of embodiment 1)

As implied above, the horizontal still 1 of Sewing machines according to present embodiment relates to utilizes permanent magnet 90, can be with interior all side pretensions of middle still 60 outside stills 70.Therefore, the frictional force in can improving between still 60 and the outer still 70, still 60 and outer still 70 move to the direction of rotation downstream together in making.Thus, can utilization allow line device 10 and in making the lug boss 61 of still 60 and outside form the gap between the needle plate lower surface in direction of rotation downstream of still 70 after, lug boss 61 and outside guarantee the gap between the needle plate lower surface of still 70 direction of rotation upstream sides waltz through so that reach the standard grade.Its result can realize the raising of quality of sewing.

In addition, allow the leading section 11 of line device 10 move along the elliptic orbit of the direction rotation identical with the direction of rotation of outer still 70, and with middle still 60 butts.Therefore, owing to can make and make the actuating quantity of line device 10 centering stills 60 few, and to make speed of action be low speed, so can obtain above-mentioned effect when sound that the time spent produces is made in reduction.

(embodiment 2)

Below, with reference to Fig. 5 and Fig. 6, describe embodiments of the present invention 2 in detail.In addition, in embodiment 2, the identical label of structure mark to identical with above-mentioned embodiment 1 omits the record that repeats.

The related horizontal still 101 of Sewing machines of embodiment 2 is with the difference of above-mentioned embodiment 1, has lever (seesaw) mechanism 191, it is as connecing the structure of disembarking, and is corresponding with the centrifugal force increase of following outer still 70 rotations, and making magnet is that permanent magnet 190 is near middle stills 60.

Described leverage 191 has: back shaft 193, and its rotating shaft with outer still 70 is that still axle 72 is provided with abreast, is fixed on the outer circumferential side of outer still 70; Plate-shaped member 192, itself and this back shaft 193 can link with rotating freely; Permanent magnet 190, it is configured in the distolateral of plate-shaped member 192 across back shaft 193, be fixed on this plate-shaped member 192 on the surface of outer still 70 central sides; Counterweight 194, it is made of nonmagnetic substance, be configured in across another of the sheet material 192 of back shaft 193 distolateral, towards the outside of outer still 70 and be fixed on the plate-shaped member 192; And leaf spring 195, it is with the center position pretension of the outside still 70 in end that is fixed with these counterweight 194 1 sides of plate-shaped member 192.

This leverage 191 utilizes the pretightning force of leaf spring 195, the end that continues to be fixed with counterweight 194 1 sides in the sheet material 192 with the mode pretension of middle still 60 butts.Like this, if the rotary speed of outer still 70 improves, then counterweight 194 pretightning force of resisting leaf spring 195 owing to centrifugal force is mobile laterally, and is near to middle still 60 side joints so permanent magnet 190 utilizes leverage 191.Thus and since from permanent magnet 190 to the magnetic force that applies of still 60 increase, so middle still 60 with respect to the sliding surface of outer still 70, adsorbed more powerfully, thereby improve the frictional force that between middle still 60 and outer still 70, acts on.Thus, corresponding and middle still 60 outside still direction of rotation downstreams (clockwise direction among Fig. 5 and Fig. 6) rotation with the rotation of outer still 70.

The Sewing machines horizontal still 101 related according to embodiment 2, because along with the rotary speed of outer still 70 becomes big, permanent magnet 190 is approaching to middle still 60, so the frictional force between still 60 and the outer still 70 in can improving.Thus,, also can make to utilize to allow line device 10 and the outside middle still 60 that rotates of the direction of rotation upstream side of still 70, easily utilize the revolving force of outer still 70 and reset to the direction of rotation downstream even when still 70 rotates at a high speed outside.Its result, can make reaches the standard grade waltzs through between middle still projection 61 and the needle plate projection 81,82, realizes the stabilisation of quality of sewing.

In addition, under the situation of structure with the leverage 191 shown in the embodiment 2, can be set at by weight greater than permanent magnet 190 with counterweight 194, maybe will distance be set at distance, thereby make permanent magnet 190 approaching to middle still 60 along with the rotation of outer still 70 greater than 190 center of gravity from back shaft 193 to permanent magnet from this back shaft 193 to the center of gravity of counterweight 194.

Claims (2)

1. the horizontal still of a Sewing machines, it has:

Outer still, it has the tip, and the wire loop of reaching the standard grade that is formed by suture needle is caught by rotation in this tip;

In still, it is configured in the above-mentioned outer still, has lug boss simultaneously, this lug boss is entrenched in by activity in the fitting portion that is arranged on the needle plate lower surface, self the rotating of rotation of above-mentioned outer still followed in restriction; And

Allow the line device, the moving up and down synchronously of itself and above-mentioned suture needle, periodically will above-mentioned middle still pull to still direction of rotation downstream part and above-mentioned telescoping part outside the edge that makes above-mentioned lug boss from direction,

It is characterized in that,

Have magnet, it is used for above-mentioned still interior all side draughts of still outside above-mentioned attached.

2. the horizontal still of Sewing machines according to claim 1 is characterized in that,

Have and connect the structure of disembarking, it increases correspondingly with the centrifugal force of following above-mentioned outer still rotation, makes magnet approaching to middle still.

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