JPS61217194A - Sewing machine - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a sewing machine ζ2 that can perform lock stitch, single chain stitch, and double chain stitch with one machine.

[Conventional technology]

Hitherto, there has been no single sewing machine of this type that can perform lock stitches, single chain stitches, and double chain stitches.

[Problem that the invention seeks to solve]

In other words, if a single machine can only perform lock stitching or chain stitching, it is inconvenient, the value of use is low, and its use is limited to a narrow range.

[Means for solving problems]

The present invention provides a rocking table that is installed in a bed so as to be able to swing freely, and has a front head and a rear head at front and rear positions on the rocking end side;
Rotary pot for lockstitch mounted on the front head and rotatable and slidable on the rear head C: A mounted louver shaft and a lockstitch fixed to the louver shaft at a small distance so as to be non-rotatable and non-slidable. A louver for single chainstitching and a louver for double chainstitching, a drive shaft for the hook louver provided in the bed, a rotary hook operation transmission section that works with this drive shaft, and a louver operation transmission that also works with the drive shaft. , an operating section for swinging the rocking table back and forth, and an operating section for sliding the louver shaft. When the louver for single chainstitch and the louver for double chainstitch are positioned below the feed dog needle hole, and the louver for double chainstitch is located below the feed dog needle hole, and when the rocking table is swung backwards,・When sliding it to the other side, make sure that the louver for single chainstitch and the louver for double chainstitch stop at the specified position under the feed dog needle hole. It is designed to be able to perform single chainstitch and double chainstitch.

〔Example〕

The embodiment shown in the figure has a hook shaft (3) connected to the tip of the hook/louver drive shaft (1) via a double type universal joint (2).
), attach the rotary hook (4) for self-lockstitching to the tip of the hook shaft (3), and attach the rotary hook (2 swing hooks) on the bottom wall of the hook shaft (3) to the bottom wall of the bed (5). A table (6) is placed on the bed (5), and the base end of the rocking table (6) is connected to the central axis (7).
), and a front head (8) and a rear head (8)' are provided at the front and rear portions of the swinging end of the rocking table (6),
Upper C of the front head (8): Place the above pot shaft (3) on the first
It is rotatably supported by a bearing (9) and the rear head (
8) A louver shirt) (lυ is rotatably and slidably supported on a second bearing α, and a single chainstitch louver (13 and two The heavy chain sewing louver 04 is fixed in a non-rotatable and non-slidable manner, and a crank is attached to the inner end of the louver shirt (C11) through the a joint (17) between the square shaft (15 and the square hole) to the outer end. (rotating shaft α with L8) is connected, and the said rotating shaft 0 is rotatably and non-slidably supported on the rear head (8)', and the above-mentioned bed (5 ) (Driving shirt in) Parallel to (1) in vertical arrangement (Figure 1 = driven shirt horizontally (shown shifted by two))
c12 is loaded, and the driven shaft 4 is rotatably supported on the bed 16) via the fourth bearing 1), and the driven shaft 4 is connected to the driven shaft 4 via the pulley 1). Put on the timing belt (2) and tighten the shirt M.
l) Make the IJ rotate together, connect the auxiliary shaft □□□ to one end of this driven shaft via the double type universal joint, and connect the auxiliary shaft (c) to the above-mentioned rocking table (6). Upper C: It is rotatably supported via the fifth bearing (to), and the rotating plate is fixed to the tip of the auxiliary shaft (to), and a double type universal joint is installed between this rotating base and the above crank side. A series of rods (connected by 3υ so that the same rank can be swung by an auxiliary shaft (c)), and a pair of horizontal rods (b) (to) are attached to the vertical part of the body (to). A lockstitch/chainstitch switching lever (
Similarly, the first arm C7) is fixed to the intermediate position of the first arm C7), and the tip of this first arm is connected to the rear head (8)' of letter L with the first wire (to), and the lockstitch/ When the chain stitch switching lever (to) is set to the lockstitch side, the swing table (6) swings backward via the first wire link to feed the lockstitch rotary hook (4) to the needle hole (to). When the lockstitch/chainstitch switching lever (G) is set to the chainstitch side (; indicates that the rocking table (6) swings forward and the single chainstitch louver U and double chainstitch louver U and double The chainstitch louver I is placed below the feed dog needle hole 01, and the single chainstitch/double chainstitch switching lever (6) is placed at the outer end of the other horizontal rod (to), also in the middle. Fix the 27th arm in place, and connect the tip of this 2nd arm to the above louver shirt)
Connect the outer end of CIIJ to the horizontal rod (to) and the second wire (
(b), and when the lockstitch/chainstitch switching lever (to) is on the chainstitch side, when the single chainstitch/double chainstitch switching lever 4 is set to the single chainstitch side, the louver shirt) (lυ When the single chainstitch louver αJ is set at a predetermined position below the feed dog needle hole 69 via the horizontal orifice and the second wire, and the single chainstitch/double chainstitch switching lever 4 is set to the double chainstitch side. The transverse rod and the second wire (
The double chainstitch louver I is placed at a predetermined position below the feed dog needle hole 31 through the thread.

In addition, in the figure - indicates bobbin thread, supplementary indicates bobbin thread guide, - indicates bobbin thread 4 hooks,
■ is the return spring for the rocking table, ■ is the reinforcement spring, 5D is the return spring for the louver shaft, 6 is the guide roller for the first wire, - is the guide roller for the second wire, (Foundation) is the double ring Transverse cam for sewing louver α4, ■ indicates throat plate, (to) indicates stopper.

[For production]

Since the present invention has the above-mentioned configuration, to use it for lockstitching, switch the lockstitch/chainstitch switching lever (to) to the lockstitch side and move the lockstitch rotary hook (4) to the feed dog needle hole (, 39, and to use it for single chainstitch, switch the lockstitch/chainstitch switching lever to the chainstitch side, and then switch the C double chainstitch/double chainstitch switching lever (6) to the single chain stitching side. Switch to the chainstitch side and position the single chainstitch louver I under the feed dog needle hole (to), and then move the lockstitch/chainstitch switching lever (G) to the chainstitch side to use for double chainstitch. In this state, switch the single chainstitch/double chainstitch switching lever (6) to the double chainstitch side, and place the double chainstitch louver α4 at a predetermined position below the feed dog needle hole 131, respectively. It may be provided in the following manner.

〔Effect of the invention〕

As described above, the present invention is capable of both lock stitching and chain stitching, so it has an excellent effect of completely achieving the intended purpose.

[Brief explanation of drawings]

The figure shows an embodiment of the sewing machine of the present invention,
FIG. 1 is an explanatory diagram of the main parts seen from t. (1)... Drive shirt), +2)... Universal joint, (
3) ... Hook shaft, (4) ... Rotary hook for lockstitching, (
5)... Bed, (6)... Rocking table, (7)...
Central axis, (8)...frontal head, (8)'...backward head, (9)...first bearing, αυ...loupe shaft, l13...second bearing , α3... Louver for single chain stitch, I... Louver for double chain stitch, Square... Square shaft, aQ
... Square hole, αη ... Sliding club, bet ... Crank, a
9...Rotating shaft, (7)...3rd bearing, @...driven shaft, 4'...bearing, (c) (to)...pulley, (to)...timing belt , (to)...auxiliary shaft, □□□...universal joint, (support)...bearing,
Prisoner...rotating plate, ω...universal joint, C(I)...continuous rod, (to)...body, (9) (to)...horizontal rod, (
To)...Switching lever, (9)...Arm, link...
Wire, (To)...Feed dog needle hole, (Rotation)...Switching lever, -...Arm, (Foundation)...Horizontal rod, (B)...
...wire, -...bobbin thread, supplementary...bobbin thread guide, four...bobbin thread 4 hook, -...return spring, 524) 3-
・・Guide roller, (Foundation) ・・Transverse cam, ・・・ Throat plate, ■・・・Stopper.

Claims (1)

[Claims] A rocking table with a front head and a rear head mounted on the front and back of the rocking end, which is installed in the bed so as to be able to swing freely; A louver shaft mounted so as to be rotatable and slidable; a single chainstitch louver and a double chainstitch louver fixed to the louver shaft at a small distance so as to be non-rotatable and non-slidable;
A drive shaft for the pot and louver provided in the bed, a transmission section for operating the rotary pot that is linked with this drive shaft, a transmission section for operating the louver that is also linked with the drive shaft, and an operation for swinging the above-mentioned rocking table back and forth. and a sliding operation part for the louver shaft, and when the oscillating table is swung forward, the lockstitch rotary hook stops at a predetermined position below the feed dog needle hole, and the oscillating table is rotated. When the louver is swung backwards, the louver for single chainstitch and the louver for double chainstitch are positioned below the feed dog needle hole, and when the louver shaft is slid selectively to one side or the other, it is for single chainstitch. A sewing machine characterized in that a louver and a louver for double chain stitching are alternatively stopped at a predetermined position below a feed dog needle hole.