JPS6219340Y2 - - Google Patents

Description

[Detailed description of the invention] This invention relates to a presser foot for tufting sewing using a zigzag sewing machine.

A tufting presser foot used when sewing a loop-shaped pile onto a base fabric using a zigzag sewing machine is known.

As shown in the front view of FIG. 6, this known presser foot has a wide presser foot body 1 with a wide opening 2 in the center, a fin piece 3 extending rearward from the center of the front part of this opening 2, and a sewing machine needle. are lowered alternately on both sides of the fin piece 3 to form a loop with the needle thread that hangs over the fin piece 3.

In the case of such a conventional presser foot, since the lower front surface of the body 1 is flat, another row of loops can be sewn along the row of loops sewn in the previous step as shown in Fig. 6. During sewing, the next row of loops 4 sewn onto the base fabric 5 in the previous step are knocked down by the lower front surface of the main body 1, and do not return completely even after the main body 1 has passed. In addition, the needle may descend to the fallen loop 4, and the next loop to be sewn may be sewn into the next row of loops 4, resulting in an extremely unsightly situation. In order to do this, if the distance between the adjacent rows of loops 4 is widened, the stitching problem can be solved, but there are problems such as the base fabric between the rows of loops being noticeable and making it look unsightly.

This invention aims to solve the above-mentioned drawbacks of the conventional presser foot for tufting sewing, and is designed to prevent the presser foot from pushing down the loops in the adjacent row that were sewn in the previous process. It is.

In other words, this idea is useful when sewing new loops parallel to the rows of previously sewn loops in required areas such as on both sides of the lower front of the presser foot body, which is provided with loop-forming fins. , recesses into which the loops of the adjacent row previously sewn fit are provided on both sides of the front of the main body of the presser foot, so that the loops of the adjacent row pass through the recesses, With this configuration, not only will the loops sewn next to each other in the previous process not collapse, but even if the loops are sewn close to the row of adjacent loops, Since there is no possibility that the newly sewn loop will dig in, a finely pitched and dense loop can be obtained, and the loop rows are finely spaced, and beautiful tufting stitches can be obtained.

The details of this invention will be explained below based on an embodiment shown in the accompanying drawings.

In FIGS. 1 to 3, reference numeral 11 denotes a presser foot attachment portion, which is fitted into the lower end of the presser bar 12 in the same way as a known presser foot attachment portion, and is fixed with a set screw (not shown).

Reference numeral 13 denotes a presser foot body, the front part 14 and the rear part 15 of which are curved upward like a known presser foot. A large opening 16 is formed in the main body 13 as shown in FIG. 4, and a fin piece 18 is provided from the center of a frame 17 formed on the front part of the main body 13 toward the rear.

On both sides of the front part of the presser foot main body 13, there are a pair of left and right openings 1, into which the previously sewn loops fit.
9 and a pair of left and right recesses 20 formed on the lower side of the frame 17
It has been established as Further, the side walls 24 of the pair of left and right recesses 20 are formed so that the width of the recesses 20 becomes as narrow as possible from the front to the rear of the presser foot body 13, as shown in FIG. More preferably, the rear end 21 of the opening 16 is also provided with a fitting part that reaches the middle of the rear part 15, as shown in FIG. 4, to prevent the sewn loop from falling over.

Further, a pair of left and right protrusions 22 are integrally formed on both upper sides of the presser foot main body 13, and the lower end of the mounting portion 11 is made into two parts, and the lower ends are placed inside the protrusions 22 and attached to a shaft 23. Connected so that it can rotate freely.
Another embodiment shown in FIG. 7 is a presser foot in which the front part of the presser foot main body 13 does not have an upwardly curved part, and the frame 17 has a wedge-shaped section extending from the lower center to the front. A convex portion 25 is formed to facilitate introduction of the adjacent row of loops 4 into a pair of left and right recesses 20 formed in the frame 17.

The presser foot of this invention has the above-mentioned structure, and like the conventional presser foot, the needles are lowered alternately to both sides of the fin piece 18 to form a loop on the base fabric 5, but as is clear from FIG. , the loops 4 in the next row that landed on the base fabric 5 in the previous step pass through the opening 19 and enter the recess 2.
0 and gets stuck. At this time, the loops 4 of the next row are guided along the slope of the side wall 24 within the recess 20 into which they are fitted, so that there is no danger of them falling near the point of descent of the needle 26 when exiting the recess 20. Therefore, each loop 4 in the adjacent row is not sewn in when sewing a new one, and also does not lose its shape, so it is possible to sew the rows of loops with narrower intervals. As a result, a beautiful tufted seam with tight loops is obtained.

[Brief explanation of the drawing]

Fig. 1 is a side view of the presser foot of this invention, Fig. 2 is a plan view of the same as above, Fig. 3 is a front view, Fig. 4 is an enlarged perspective view of only the main body, and Fig. 5 is a front view explaining the function. , FIG. 6 is a front view illustrating the function of a conventional presser foot, and FIG. 7 is a plan view showing another embodiment. 4...Next loop, 5...Base fabric, 13...
Presser foot body, 16, 19...opening, 18...fin piece, 20...recess.

Claims (1)

[Scope of utility model registration request] In a tufting presser foot with a loop-forming fin piece in the center, which is used when making tufting stitches using a zigzag sewing machine, a new loop is created parallel to the row of previously sewn loops. When sewing, make recesses on both sides of the front of the presser foot body into which the loops of the next row that have been sewn first will fit, so that the loops of the adjacent row pass through the recesses. Presser foot for tufting sewing.