JPS5830051Y2 - Sewing machine tape feeding device - Google Patents

Description

[Detailed explanation of the invention] This invention is based on tapes, rubber strings, etc. wrapped around tape reels (
The present invention relates to a tape feeding device used when feeding tape (generally referred to as tape in this specification) to a sewing machine.

Conventionally, tape to be sewn onto fabrics is fed from a tape reel to the sewing machine, but when feeding out the tape, the tension used to pull out the tape varies depending on the amount of tape wound on the tape reel, so a large amount of tape is used. When the tape is wound around the sewing machine, the tension becomes large and the tape is supplied to the sewing machine in a stretched state and sewn, resulting in inconvenience in sewing.

To solve this problem, it was necessary to unwind the tape from the tape reel in advance to prevent tension from building up on the tape.

This invention eliminates such trouble and allows the necessary amount of tape to be fed out in advance so that the tape is always supplied with no tension, regardless of the amount of winding on the tape reel. It is.

Embodiments of the present invention will be described below with reference to the drawings.

Reference numeral 1 denotes a column that stands upright on a pedestal 2, and on this column, a pair of tape guide rods 5, 6 that are perpendicular to the column and parallel to each other, shafts 4, 7, and a support shaft 3 located on both upper and lower sides thereof are vertically attached. They are lined up in the same direction and are attached by screws 8 so that the height can be adjusted.

Reference numeral 9 denotes a tape 2 rotatably supported by the support shaft 3.
A tape reel 7 is wound around the tape reel, and 10 is a lever whose intermediate portion is pivoted on the shaft 4, and which is biased clockwise by a spring 12 attached to this shaft. The portion 11 engages with a stopper 16 rotatably attached to the end of the shaft 4, thereby preventing clockwise rotation due to the action of the spring 12.

The lever 10 is also connected at one end to a presser foot lifter pedal (not shown) via a chain 13, and when the presser foot lifter pedal is depressed, the presser foot is raised in a known manner and the lever 10 is moved by the spring 12. The tape feeding rod 14 attached to the other end of the lever 10 also pivots in a direction away from both guide rods, along with the tape between the guide rods 5 and 6. do.

At this time, as will be described later, the tape is firmly supported by the lower guide rod 6 (on the side of the stitch forming mechanism) and the tape presser 21 of the lever 22, so the pivoting of the tape feeding rod 14 causes the tape to rotate the tape reel. It is brought out while.

Thereafter, when the presser foot lifting pedal is released, the presser foot is lowered and the lever 10 is moved back together with the tape feeding rod 14 by the action of the spring 12.

Reference numeral 15 denotes a set screw for attaching the rising portion 14a of the tape feeding rod 14. When the set screw is loosened and the height of the tape feeding rod 14 is adjusted, the diameter from the shaft 4 changes and the amount of tape feeding is adjusted.

The amount of tape feeding can also be adjusted by adjusting the heights of the outer shaft 4 and guide rods 5, 6, and the mounting position of the stopper 16.

Similar to the lever 10, the lever 20 has an intermediate portion pivotally supported on the shaft 7,
A lever that is biased clockwise by a spring 22.
The side portion is formed as a tape presser 21 extending parallel to the shaft 7, and is pressed against the lower guide rod 6 by the action of the spring 22 to prevent the tape presser 2 from pivoting clockwise.
1 and the guide frame 6 can firmly hold the tape.

The other end of the lever 20 is connected to a motor drive pedal via a chain 23, and when the motor drive pedal is depressed to drive the motor, that is, to start sewing, the tape presser 2
1 is separated from the guide rod 6, and the tape is released from being firmly held.

Next, the operation of this device will be explained.

In the state shown in the figure, in which the tape 27 is sequentially hung from the tape reel 9 on the upper guide rod 5, the tape feeding rod 14, and the lower guide rod 6 and reaches the stitch forming mechanism of the sewing machine, first presser foot lifting pedal (not shown) is applied. When you step on the button, the tape feed rod 14 rotates counterclockwise around the shaft 4 and the tape 27
is fed out from the tape reel 9.

Meanwhile, at the same time, the presser foot is raised, and the sewing fabric is inserted between the presser foot and the throat plate.

After this, when the presser foot lifting pedal is released, the tape feeding rod 14 moves back by the action of the spring 12 to loosen the fed tape and the presser foot descends to press the sewing cloth.

Next, when the motor drive pedal is depressed, the lever 20 pivots counterclockwise and separates from the guide rod 6, releasing the tape from tight contact, while driving the sewing machine motor.

From then on, as sewing begins, the loose tape may become under tension.
It is supplied to the sewing machine in a state in which the

Since this invention is constructed as described above, it is possible to always supply tension-free tape to the sewing machine regardless of the amount of winding on the tape reel.

In addition, it is possible to feed out the required amount of tape in advance using sewing machine operation, which eliminates the need to unwind the tape one by one from the tape reel to prevent tension from being applied to the supplied tape. .

[Brief explanation of drawings]

The figures show a tape feeding device of a sewing machine according to the present invention, with FIG. 1 being a front view and FIG. 2 being a perspective view. 1... Support column, 3... Support shaft, 4, 7.
...Axis, 5, 6...Guide rod, 8...
...Screw, 9...Tape reel, 10...
...Lever, 11...Protrusion, 12...
Spring, 13... Chain, 14... Tape feeding rod, 15... Set screw, 16...
...Stopper, 20...Lever, 21...
... Tape presser, 22 ... Spring, 23 ...
...chain, 27...tape.

Claims (1)

[Claims for Utility Model Registration] ■ A pair of guide rods 5 and 6 that guide the tape 27 in the tape supply path from the tape reel 9 to the seam forming mechanism.
When the operation device is operated, the tape is engaged with the tape between the guide rods 5 and 6 and moved in the direction of stretching the length of the tape between the guide rods. A rod 14 is provided, and among both the guide rods,
At least the tape feed-out rod moves on the guide rod 6 on the side of the seam forming mechanism, and while the tape is being fed out, it is in pressure contact with the guide rod 6 to firmly hold the tape, and during sewing, it is separated and released to release the tape. This tape feeding device for a sewing machine is provided with a tape presser foot 21 and is capable of supplying loosened tape to a seam forming mechanism in a tension-free state by the backward movement of a tape feeding rod after sewing starts. 2. Registered Claim 1: A certain amount of tape required for sewing is fed out from a tape reel in advance by movement of a tape feeding rod 14 that engages with the tape.
The tape feeding device of the sewing machine described in Section 1. 3. The tape presser foot 21 is constantly urged by a spring 22 to be in pressure contact with the guide rod 6, and is moved away from the guide rod 6 against the spring in conjunction with the driving operation of the sewing machine motor. A tape feeding device for a sewing machine according to claim 1. 4. The tape feeding device for a sewing machine according to claim 3, wherein the tape presser foot 21 is connected to a driving pedal of a sewing machine motor. 5. The tape feeding device for a sewing machine according to claim 1, wherein the tape feeding rod 14 is adapted to reciprocate in conjunction with the lifting and lowering operation of the presser foot. 6. The tape feeding device for a sewing machine according to claim 5, wherein the tape feeding rod 14 is linked to a presser foot lifting pedal. 7. The tape feeding rod is attached to the lever 10-side end which has its middle portion pivoted and is biased in one direction by a spring 12 so as to be locked to the stopper 16, and the other end of the lever is attached to the presser foot lifting pedal. A tape feeding device for a sewing machine according to claim 6, which is connected to a sewing machine. 8. Registered claim 1 or 2, which is provided with a device that can adjust the amount of tape fed by the tape feeding rod 14.
The tape feeding device of the sewing machine described in Section 1.