CN1321807A

CN1321807A - Sewig machine for sewing zigzag stitch

Info

Publication number: CN1321807A
Application number: CN01115470A
Authority: CN
Inventors: 小川达矢; 横田哲久
Original assignee: Juki Corp
Current assignee: Juki Corp
Priority date: 2000-04-27
Filing date: 2001-04-27
Publication date: 2001-11-14
Also published as: KR20010098853A; CZ20011497A3; JP2001300173A; KR100685064B1

Abstract

The present invention provides a zigzag chain stitch sewing machine which vertically moves a needlebar supporting base 5 for supporting a needlebar 4 by means of a main motor 3 directly coupled onto an upper shaft 2 and alternately shogs the needlebar supporting base 5 in a direction orthogonal with a cloth feed direction by means of the needle shogging motor 6, which is built into the sewing machine head section 1 and is annexed with an origin position detecting means 26, provides with a partition 9 between the main motor 3 and the needle shogging motor 6 and provides with a fan 8 for cooling the needle shogging motor 6 at a thread winding drive wheel 7 fixed to the upper shaft for driving a bobbin thread bobbin winding device 29.

Description

Sewig machine for sewing zigzag stitch

The present invention relates to a kind of eedle that makes and swing back and forth, promptly carry out so-called sawtooth and make in the direction vertical with cloth feeding direction, and in the Sewig machine for sewing zigzag stitch of drive motors is housed.

Sewig machine for sewing zigzag stitch, promptly, be contained in head of sewing machine portion and the shank brace table of supporting needle rod moved up and down by interior with the direct-connected main motor of last axle, make the shank brace table at the Sewig machine for sewing zigzag stitch that the direction vertical with cloth feeding direction swings back and forth by the interior eedle swing motor that is contained in head of sewing machine portion, be suggested already and be widely known by the people.

Above-mentioned Sewig machine for sewing zigzag stitch swinging the approaching position of motor with the eedle of heating when rotating, is provided with the origin position detecting sensor.So this origin position detecting sensor is had to adopt and can be born the high price sensor that eedle is swung the heating of motor, manufacturing cost is also than higher.Though proposed Sewing machines, in the Sewig machine for sewing zigzag stitch of the interior eedle swing motor that band origin position detecting element is housed, also do not existed eedle is swung the device that motor cools off to cooling off with the direct-connected main motor of last axle.

The Sewig machine for sewing zigzag stitch that the purpose of this invention is to provide the eedle swing motor that is contained in head of sewing machine portion in a kind of can the cooling.

Sewig machine for sewing zigzag stitch of the present invention, be to be contained in head of sewing machine portion 1 and the shank brace table 5 of supporting needle rod 4 to be moved up and down, be contained in head of sewing machine portion 1 and have the Sewig machine for sewing zigzag stitch that the eedle swing motor 6 of origin position detecting element 26 makes shank brace table 5 swing back and forth in the direction vertical with cloth feeding direction by interior simultaneously with last axle 2 direct-connected main motors 3 by interior; Between main motor 3 and eedle swing motor 6, be provided with next door 9, be provided with near the eedle swing motor 6 with on axle 2 interlocks and produce the fan 8 of air-flow.

Eedle swing motor 6 is set at the place near last axle 2, and the air-flow of discharging from fan 8 flows along the radiation direction from last axle 2.

The part of facing fan 8 at least at eedle swing motor mounting plate 17 forms porose or notch 17a.

Fan 8 is installed in the suture that is fixed on the axle for driving bottom line axle batching apparatus 29 and batches on the driving wheel 7.

Below, symbol among accompanying drawing and the figure is described.

Fig. 1 (1) is the vertical view of Sewig machine for sewing zigzag stitch of the present invention, and (2) are for constituting the side view of Sewig machine for sewing zigzag stitch fan part of the present invention.

Fig. 2 is the front view of Sewig machine for sewing zigzag stitch of the present invention.

Among the figure: 1-sewing machine arm, the last axle of 2-, 3-master's motor, the 4-shank, 5-shank brace table, 6-eedle swing motor, the 7-suture batches driving wheel, the 8-fan, the 9-next door, 17-motor base board (eedle swing motor mounting plate), 17a-hole, 26-sensor (origin position detecting element), 29-bottom line axle batching apparatus.

Embodiment

Below, with reference to attached Fig. 1 and 2 Sewig machine for sewing zigzag stitch embodiment of the present invention is described.

This Sewig machine for sewing zigzag stitch, be the shank brace table 5 of supporting needle rod 4 to be moved up and down, swing the Sewig machine for sewing zigzag stitch that motor 6 makes shank brace table 5 swing back and forth in the direction vertical with cloth feeding direction by the interior eedle that is contained in the head of sewing machine portion 1 simultaneously by interior being contained in the head of sewing machine portion 1 that forms by cantilever portion 1a and uprights 1b and with last axle 2 direct-connected main motors 3; Between main motor 3 and eedle swing motor 6, be provided with next door 9, be provided with fan 8 with last axle 2 interlocks for cooling eedle swing motor 6 simultaneously.Below, in order each one is described.

The motor shaft 3a of main motor 3 passes the next door 9 that is arranged in the uprights 1b top, is connected with last axle 2 by shaft coupling 10.

One is being fixed counterweight 11 on the axle 2 on rotatable on the frame that is supported on head of sewing machine portion 1.On the eccentric position that leaves these counterweight 11 centers, supporting the upper end of rotating needle bar crank connecting rod 13 by needle bar crank 12.The bottom of this needle bar crank connecting rod 13 is supported on the shank abut 15 rotationally by fulcrum 14.Above axle 2 and rotatablely moving of counterweight 11 be transformed into reciprocal the moving up and down of the shank 4 that is fixed on the shank abut 15.Fixing eedle 16 in the lower end of shank 4 in addition.

Eedle swing motor 6 is supported on by motor base board (eedle swing motor mounting plate) 17 and is arranged near cantilever portion 1a and the locational peristome of uprights 1b, with a part expose state in the head of sewing machine outside be set near on the position of axle 2.This eedle swing motor 6 can and can intermittently rotate by positive and negative any direction as stepper motor and servomotor, and can control its anglec of rotation.Because the relation of eedle swaying direction, this motor shaft 6a is towards cloth feeding direction (fore-and-aft direction).So be an angle of 90 degrees at differing heights with the motor shaft 3a of main motor 3.

On the motor shaft 6a of eedle swing motor 6, be fixed with eedle wobble drive bar 18.On this drive rod 18, be connected with shank brace table axle 23 by eedle swing connecting pin 19, eedle swing connecting bar 20, eedle swing connecting pin 21 and shank brace table axle abut 22.Shank brace table axle 23 can axially be slidably supported on the

bearing

24,25 of shank brace table axle, and the other end is fixed on the shank brace table 5.

So, rotatablely move (rotation of eedle wobble drive bar 18) of eedle swing motor 6, be transformed into the reciprocating motion of shank brace table axle 23, by the reciprocating motion of this shank brace table axle 23 constituted the left and right directions of shank 4 reciprocating motion (with arrow represented about), and the combination of the work feed of perpendicular direction, sew double diagonal stitch.

On motor base board 17, detection is installed on the sensor installing plate 27 as the sensor (origin position detecting element) 26 of the eedle swing motor 6 rotation origin positions of eedle swing origin position.The detection of this origin position is that sensor 26 is realized by the edge that detects slit plate 28.And, owing to sensor installing plate 27 is fixed on the motor base board 17 with can adjusting the position, so can regulate the initial point of sensor 26.

From on the suture fixed to driving bottom line axle batching apparatus 29 on the very near position of the pin swing motor 6 of disembarking of axle 2 batch driving wheel 7.Batch at this suture on the face of eedle swing motor 6 one sides of driving wheel 7, equidistant and equally spaced erect a plurality of (having 3 diagram) flabellum 8a that the fan 8 that constitutes cooling eedle swing motor 6 is being set from the axle center of last axle 2.

Each flabellum 8a shown in Fig. 2 (2), is to form with the iron plate bending of lacking paliform, and the direction of rotation (arrow A) of the axle 2 that faces up that its splayed is opened is fixed at short leg.So the air flow that is produced by fan 8 promptly, flows along the radiation direction along from last axle 2 directions of leaving.

In motor base board (eedle swing motor mounting plate) 17, at least on the part of fan 8, form porose or notch 17a.So the air flow by the flabellum 8a with last axle 2 rotations is produced directly arrives eedle swing motor 6 by this hole or notch 17a, therefore can improve cooling effect.

On the top of cantilever portion 1a, be provided with to push down as the bottom line axle that batches object and to expose bottom line axle batching apparatus 29 under outside the depression bar 29a state.And, be provided with in setting near the position the back side periphery of flabellum 8a face of bottom line axle driving wheel 7, be provided with can with this bottom line axle batching apparatus 29 connect from driven pulley 29b.That is, driven pulley 29b and bar 29a interlock by opening left by docking with bottom line axle driving wheel 7 of bar 29a, are driven.And move right by bar 29a closure, leave bottom line axle driving wheel 7.And leading section in the center fixation of driven pulley 29b and expose rotating shaft 29c outside the cantilever portion 1a.Towards this rotating shaft 29c by spring action in bar 29a.

It is that bar 29a with bottom line axle batching apparatus 29 opens that the bottom line of spool batches, and makes the bottom line axle insert rotating shaft 29c, pushes down with bar 29a that the bottom line axle carries out.Under this state,,, carry out bottom line and batch so driven pulley 29b leans against the position of docking with bottom line axle driving wheel 7 and is driven because bar 29a opens a little.

According to Sewig machine for sewing zigzag stitch of the present invention, swing the fan of motor owing to be provided with to the cooling eedle, so just there is no need origin position detecting element, make manufacturing cost lower with the eedle swing motor of high-fire resistance.And, because fan is set on the axle, so, can the corresponding rotary speed that goes up axle, that is, corresponding sewing speed cooling eedle is swung motor.

According to another Sewig machine for sewing zigzag stitch of the present invention, because eedle is swung the position that motor is arranged on approaching last axle, the air-flow of discharging from fan is flowed along radiating direction from last axle, so can improve cooling effect to eedle swing motor.

According to another Sewig machine for sewing zigzag stitch of the present invention,, can directly cool off eedle swing motor owing to form porose or opening in the part of facing fan at least of eedle swing motor mounting plate.

According to another Sewig machine for sewing zigzag stitch of the present invention, because being installed in suture, batches on the driving wheel by fan, so can effectively utilize the interior space of sewing machine arm, can reduce simultaneously and assemble man-hour.

Claims

1. Sewig machine for sewing zigzag stitch, by interior be contained in head of sewing machine portion and with the direct-connected main motor of last axle, the shank brace table of supporting needle rod is moved up and down, by the interior eedle swing motor that is contained in head of sewing machine portion and is provided with the origin position detecting element, the shank brace table is swung back and forth in the direction vertical with cloth feeding direction simultaneously; It is characterized in that, between main motor and eedle swing motor, be provided with the next door, be provided with near the eedle swing motor with on axle interlock and produce the fan of air-flow.

2. according to the described Sewig machine for sewing zigzag stitch of claim 1, it is characterized in that eedle swing motor is set near the axle, the air-flow that is produced by fan flows along the radiation direction from last axle.

3. according to claim 1 or 2 described Sewig machine for sewing zigzag stitch, it is characterized in that the part of facing fan at least of swinging motor mounting plate at eedle forms porose or opening.

4. according to the described Sewig machine for sewing zigzag stitch of claim 1, it is characterized in that, fan is installed in the suture that is fixed on the axle for driving bottom line axle batching apparatus batches on the driving wheel.