JPS5946992A - Method and apparatus for mutually converting seaming and hemming bottom weaving of over-lock 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] Tension adjustment between the final IJJ l-j needle thread and the bobbin thread j'
16 The means is arranged in a two-stage configuration so that the tension values of the needle thread and the bobbin thread are equalized by the sum of the tensions of the two stages, respectively, and the tension values of both are reversed by the switching lever. The present invention relates to a method and a field dressing in which the conversion sewing is made so as to easily perform the conversion sewing between base stitching and hem hem stitching.

Conventional overlock sewing machines usually perform conversion sewing, such as base stitching on one part and hem stitching on other parts, depending on the condition of the target product being sewn. When switching between sewing and hem hem stitching, the thread tension discs for the needle thread, needle thread, and bobbin thread are set up in parallel, and the respective knobs that need to be adjusted are finely adjusted manually. For example, in the case of ground stitching, the tension ratio suitable for each prefecture is needle thread: needle thread: bobbin thread = 2
Since the ratio is 0:10:15, an expert carefully determines the ratio by operating the knobs on each tone plate according to the condition of the target fabric so that the ratio is as shown above, and then hemming. If this becomes necessary, the tension ratio for each section of hem hem stitching should be set at an appropriate ratio of needle thread: needle thread: bobbin thread = 5:10:20. This requires an expert to carefully adjust the ratio by holding the knobs on each adjustment plate and taking a long time to adjust the ratio to a value that corresponds to the condition of the fabric. This type of adjustment requires skill, which is a serious drawback in the era of high-speed sewing machines.

However, in the final IJJ, the tension disc devices for the needle thread and the bobbin thread are of the first and second two-stage type, respectively, and a simple switching lever that can be inserted and removed between the tension discs is used. The tension value of the needle thread and the tension value of the bobbin thread can be easily reversed with a single operation, thereby successfully converting both line stitching and hem stitching with one touch. monode ryo 11
It is highly effective, as even unskilled people and shoes can be converted to shoes made of '4 with extremely high efficiency and ease.

To explain in detail with reference to the attached drawing which shows an example of implementation by Kinzo, 1 is the needle thread tension adjustment plate, knob 2 is used, M is stacked, and the elastic force between the tension plates is adjusted by 1. It is designed to be adjustable and is attached to the thread tension device mounting plate 3. These are the shafts of the four-piece tension plate 1. 5 is needle thread tension 1st
This is a tension disc, which allows adjusting the elastic force between the stacked tension discs using a knob 6. Thread tension device mounting plate 3 is installed. 7 is the axis of the tone plate 5. Reference numeral 8 is a 552 needle thread tension adjustment disc, and a knob 9 is used to adjust the elastic force between the tension discs formed by stacking T. 1014 is the axis of the adjustment plate 8. 1
Reference numeral 1 designates a first bobbin thread tension adjustment disc, which is adapted to use a knob 12 to adjust the elastic force between the stacked tension discs. 13 is the axis of the adjustment plate 11. 14 is the second bobbin thread tension adjustment disc, and with knob 15,
It is possible to adjust the elastic force between the tension plates stacked one on top of the other. 16id is the axis of the tone plate 14. 17 is a needle thread, 18 is an upper thread, and 19 is a lower thread. 20 is each thread path. Reference numeral 21 is a switching lever, and the intermediate part is pivoted to the thread tension device mounting plate 3 with a shaft 22, and a horizontal direction is moved between the plates 8 and 8 formed by stacking n1 needle thread tension and second tension plates 8. The fc cutting protrusion 23 is inserted into the needle thread tension 2nd
It is provided protrudingly facing the tone plate 8. 24 is made into a lever stopper and is provided protruding from the side of <-21, and when the inside of the 100 cut-in protrusion 23 is excessively inserted between the tension discs 8 and 8, the tension of the tension disc 8 becomes zero. At this point, the thread W1Δ is brought into contact with the (liII) curve of the child device receiving plate to stop the axial movement of the switching lever 21.25 is the interruption of the second thread R1,'!l child 111L14. With fragments,
Stacked plate 14.14 of the lower thread tension second tension plate 14
It protrudes from the other end of the switching lever 21 so that it can be inserted laterally between the switching levers 21 and 21. 26 is a stopper and is provided protruding from the upper part of the cutting J-hole lever 21, and a 1m cutting protrusion 25 is inserted between the bobbin thread 2nd MI4 child plate 1a, and both holes 14 child plate 14.1 are inserted.
The pressing force at the 4th stroke does not reach the bobbin thread that penetrates 11n and becomes zero. Reference numeral 27 denotes a lever knob which allows pressing operation #J with the finger end when the lever is pivoted.

When using the Suekan 1-1 with the above-mentioned configuration, first, adjust each needle thread, upper thread,
The tension of the bobbin thread is determined by controlling each part of the tension, and in the case of base stitching, the ratio of needle thread: needle thread: bobbin thread is 5:10:15 in the first tension plate group. By adjusting the ratio of needle thread:bobbin thread -15:o in the second tension plate group, the sum of @1 and the second tension can be adjusted, needle thread (5+15=20), If you want to obtain a suitable tension ratio of upper thread 0ω and lower thread 0ω, and then convert it to hem stitching, use the first tension plate to adjust the tension ratio of the needle thread. : Upper thread: Lower thread = 5: 10
: 15, and in the second tension disc, the ratio of tension: total needle thread: bobbin thread = 0:5, and the sum of the tensions of both tension discs is the needle thread (5 + 0 = 5), upper thread ( 1o), bobbin thread (
15+5=20), simply push the lever handle 27 of the switching lever 21 to move the interrupting piece 23 to the second tone plate 8.
, 8 and set the tension of the second tension plate 8 to zero, the tension can be changed to the one suitable for hem stitching as described above without any adjustment by knobs, etc. It is effective for dogs.

[Brief explanation of drawings]

The attached drawings show an example of the implementation of the present invention. Fig. 1 is a side view of the main part, Fig. 2 is a plan view of the main part showing the relationship between the adjustment plate and the switching lever, and the upper part shows the split piece in full condition. Pull it out from between the plates and apply tension to the tension plate.
Part B inserts the cutting piece toward the tension disc and presses the tension disc against the thread.
'J [The case where the tension is zero is not shown. 1... Upper thread tension disc, 2... Same 2 knobs, ;)... Thread tension)):) Mounting plate, 4... Axis of tension disc, 5... Needle thread tension 1st tension Plate, 6...Same pick, 7...
Ditto disc shaft, 8...Second needle tension adjustment disc, 9...
Same as above knob, 10... Same as above dish shaft, 11... First lower thread tension adjustment disc, 12... Same as above knob, 13... Same as above disc shaft, 14... Second lower thread tension adjustment disc, 15...
・Same knob, 16...Same dish shaft, 17...Needle thread, 1
8... Upper thread, 19... Lower thread, 20... Each thread path, 2
1...Switching lever, 22...Switching lever shaft, 23
...Interrupting protrusion, 24...Lever stopper, 25.
...Interrupting flash piece, 26...Same stopper, 27...
Lever handle. Figure 1 Figure 2 Figure A

Claims (1)

[Claims] 1. The needle thread tension is fixed, the needle thread tension and the bobbin thread tension are each adjusted in two stages, and the sum of the two-stage tension adjustment values is mutually reversed. How to convert between base stitch and hem hem stitch on an overlock sewing machine. 2. - needle thread tension adjustment discs are provided.
two sets of needle thread tension adjustment discs; Second. The middle part of the two sets of bobbin thread tension adjustment discs is pivoted to the machine frame, and one end can be inserted and removed between the second needle thread tension adjustment discs by pivot movement, and by changing the shaft movement. A mutual conversion device for base stitching and hem stitching for an overlock sewing machine, characterized in that a switching lever is provided, the other end of which is inserted into and removed from a second bobbin thread tension disc. 3. Provided with - needle thread tension adjustment discs, 1st and 2nd.
Two sets of needle thread tension adjustment plates, broom 1, broom 2,
Two sets of lower thread tension D and 7 child discs are provided, the middle part is attached to the machine frame, and one end can be inserted and removed between the second needle thread tension discs,
A switching lever is provided, the other end of which can be inserted and removed between the second lower thread tension disc by means of III movement change, and a stopper related to insertion of the needle thread tension disc and a lower thread hIJ are provided on the side surface of the switching lever. A mutual conversion device for base stitching and hem stitching of an overlock sewing machine, characterized in that it is fully connected with a stopper related to inserting between child plates, and further has a lever handle protruding from one end.