JPH01104975U

JPH01104975U -

Info

Publication number: JPH01104975U
Application number: JP99888U
Authority: JP
Priority date: 1988-01-07
Filing date: 1988-01-07
Publication date: 1989-07-14
Anticipated expiration: 2003-01-07
Also published as: JPH0510792Y2

Description

[Brief explanation of drawings]

第１図は本考案の一実施例であるルーパ駆動機
構の分解斜視図、第２図は同機構の要部断面図、
第３〜６図はそれぞれ別の実施例の要部分解斜視
図、第７図は作用説明図である。１…ルーパ軸、８…固定軸、９，３３，４１，
５１，６１…クランク、１２…縦孔、１３…取付
面、１４…調整溝、１５，３１，４５，５３…ブ
ラケツト、１６…締付ネジ、１７…調節ネジ、１
８…偏心ピン、２１…蓋、２３，３５…クランク
ピン、２５…クランクピン案内、２６…ルーパ、
３２…取付軸、４２…蟻溝、４３…スライダー、
４６…ナツト、５５，６２…長孔、６３…鍔付ピ
ン。 Fig. 1 is an exploded perspective view of a looper drive mechanism that is an embodiment of the present invention, Fig. 2 is a sectional view of essential parts of the mechanism,
3 to 6 are exploded perspective views of main parts of different embodiments, and FIG. 7 is an explanatory view of the operation. 1... Looper axis, 8... Fixed axis, 9, 33, 41,
51, 61... Crank, 12... Vertical hole, 13... Mounting surface, 14... Adjustment groove, 15, 31, 45, 53... Bracket, 16... Tightening screw, 17... Adjusting screw, 1
8... Eccentric pin, 21... Lid, 23, 35... Crank pin, 25... Crank pin guide, 26... Looper,
32...Mounting shaft, 42...Dovetail groove, 43...Slider,
46... Nut, 55, 62... Long hole, 63... Flange pin.

Claims

[Claims for Utility Model Registration] (1) A looper shaft 1 that is rotatable and slidable in the axial direction and is supported horizontally, and a fixed shaft 8 that is perpendicular to the looper shaft 1 and interlocked with the main shaft. The cranks 9, 33, 41, 51, 61 swing around the fixed shaft 8.
and a crank pin 23 supported with respect to the crank so that its position can be adjusted in a direction orthogonal to the fixed shaft 8,
35, 65, fixed to the shaft end of the looper shaft 1,
The shaft end surface of the looper shaft and the crank pins 23, 3
5, 65, and the direction in which the crank pins 23, 35, 65 are adjusted is vertical when the looper 26 is in a position for scooping up needle thread loops. (2) Brackets 15, 31, 45, 53 are fixed to the cranks 9, 33, 41, 51 so that their positions can be adjusted in the vertical direction when the looper 26 is in the position to scoop up the needle thread loop, and the crank pins 23, 35 2. A looper drive mechanism for a sewing machine according to claim 1, wherein said looper drive mechanism is pivotally supported at both ends by fork-shaped arms 24 of said bracket. (3) The crank 9 has an adjustment groove 1 parallel to the fixed shaft 8.
3. A looper drive mechanism for a sewing machine according to claim 2, wherein an eccentric pin 18 is rotatably supported by the bracket 15 and fits into the adjustment groove 14. (4) A mounting surface 13 is formed on the crank 9. With the bracket 15 connected to the mounting surface 13, the bracket 15 is fitted to the crank 9 so as to be slidable in the vertical direction, and fixed to the crank 9 through the vertical hole 14. Tightening screw 1
The looper drive for a sewing machine according to claim 2 or 3, wherein the tightening screw 16 faces an opening 19 provided at the rear of the sewing machine and the lid 21 is removably attached. mechanism. (5) A mounting shaft 32 is provided vertically protruding from the bracket 31 and is inserted into the crank 33, and a set screw 34 is inserted into the bracket 31.
The set screw 34 faces the opening 19 provided at the back of the sewing machine, and the lid 2
3. A looper drive mechanism for a sewing machine according to claim 2, wherein said looper drive mechanism is adapted to be detachably attached. (6) A dovetail groove 42 is formed in the crank 41, and a screw 44 protruding from a slider 43 fitted into the dovetail groove 42 is passed through a bracket 45, and a nut 46 is screwed onto the protruding end thereof. 3. A looper drive mechanism for a sewing machine according to claim 2, wherein the nut 46 faces an opening 19 provided at the rear of the sewing machine and the lid 21 is removably attached. (7) A flat groove 52 is formed in the crank 51, into which a mounting portion 54 of a bracket 53 is slidably fitted, and a set screw 56 is fixed to the bracket 53 through a long hole 55 in the vertical direction of the mounting portion 54. A looper drive mechanism for a sewing machine according to claim 2. (8) A longitudinal elongated hole 62 is formed in the crank 61, and a crank pin 65 is fitted into and pivotally supported by a pin 63 which is fitted into the elongated hole and fixed in a position-adjustable manner. Sewing machine looper drive mechanism. (9) A looper shaft that can rotate and slide in the axial direction, is supported horizontally, and a fixed shaft that is orthogonal to the looper shaft, and swings around the fixed shaft in conjunction with the main shaft. a crank; a crank pin supported so that the distance between the crank and the fixed shaft can be adjusted along a plane parallel to the fixed shaft; and a crank pin fixed to the shaft end of the looper shaft and fixed to the shaft end of the looper shaft; A looper drive mechanism for a sewing machine, comprising a crank pin guide that sandwiches the crank pin, and the position of the crank pin is adjusted along a vertical plane when the looper is in a position for scooping up a needle thread loop.