JPS61184578U

JPS61184578U -

Info

Publication number: JPS61184578U
Application number: JP1342086U
Authority: JP
Priority date: 1986-02-01
Filing date: 1986-02-01
Publication date: 1986-11-18
Also published as: JPS6215026Y2

Description

[Brief explanation of the drawing]

第１図は本考案に係る上送り装置を備えたミシ
ン要部機構の斜視図、第２図は同上送り装置の要
部斜視図である。１…送り駆動軸、８…主送り歯、９…差動送り
歯、１１…上送りクランク、１２…上送り軸、１
３…アーム、１４…リンク、１６…上送り腕、１
７…上送り歯、１８…スライダー、１９…角駒、
２０…二又レバー、２１…操作レバー、３０…ア
ーム、３２…メス軸、３７…押え腕軸、３８…レ
バー。 FIG. 1 is a perspective view of a main part mechanism of a sewing machine equipped with an upper feed device according to the present invention, and FIG. 2 is a perspective view of a main part of the same upper feed device. 1...Feed drive shaft, 8...Main feed dog, 9...Differential feed dog, 11...Upper feed crank, 12...Upper feed shaft, 1
3...Arm, 14...Link, 16...Upper feed arm, 1
7... Upper feed dog, 18... Slider, 19... Square piece,
20... Forked lever, 21... Operation lever, 30... Arm, 32... Female shaft, 37... Presser arm shaft, 38... Lever.

Claims

[Claims for Utility Model Registration] (1) A crank 15 that swings in conjunction with the sewing machine drive shaft, an upper feed arm 16 whose pivot point moves back and forth in the feeding direction by the swinging motion of the crank 15; It has an upper feed dog 17 attached to the upper feed arm 16 opposite to the lower feed dog 8, and a vertical movement mechanism that moves the upper feed arm 16 up and down about the pivot point. In a sewing machine, the upper feed dog 17 moves vertically symmetrically with the lower feed dog 8 in conjunction with the back and forth movement due to the dynamic movement, and feeds the cloth in cooperation with the lower feed dog 8. An arcuate upper feed swing crank 11 fixed to the drive shaft 1, a slider 18 slidably fitted to the crank 11, an upper feed shaft 12 to which the crank 15 is fixed, and the upper feed shaft. an arm 13 fixed to the slider 12; a link 14 connecting the arm 13 and the slider 18 and transmitting the swing motion of the upper feed swing crank 11 to the arm 13; a forked lever 20 which is rotatably supported on the upper feed shaft 12 and into which the square piece 19 is slidably fitted, and the upper feed shaft 1
2 as a support shaft, the slider 18 is moved along the arc of the upper feed swing crank 11 by operating the operating means, and the slider 18 is moved along the arc portion of the upper feed swing crank 11, and the slider 18 is engaged A sewing machine characterized in that the longitudinal movement of the upper feed dog 17 can be adjusted independently from the lower feed dog by changing its position. (2) The operating means includes an operating lever 21 that is integrally connected to the forked lever 20 and rotates the forked lever 20 by pivoting the upper feed shaft 12 as a support shaft; A bush 28 to be attached, a screw rod 27 screwed into the bush 28 and rotatably supported by a bracket 26 provided on the sewing machine frame, and a dial 25 attached to one end of the screw rod 27. The sewing machine according to claim 1, wherein the bush 28 moves forward and backward on the screw rod 27 by rotating the dial 25, and the operating lever 21 pivots accordingly. (3) The sewing machine according to claim 1, wherein the center of curvature of the circular arc portion of the upper feed swing crank 11 coincides with the pivot point 23 of the link 14 and the arm 13.