JP2750439B2 - sewing machine - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sewing machine that sews a ribbon-shaped tape such as a cloth ribbon or a resin ribbon to a cloth.

[Conventional technology]

It has been practiced to sew the tape with the above-mentioned tape attached to a cloth.

[Problems to be solved by the invention]

In this sewn state, there is a problem that the tape becomes flat and has poor decorativeness.

The present invention has been made in view of the above points, and an object of the present invention is to sew a tape on a cloth in a three-dimensional state where various parts are raised, and moreover, a large number of raised parts are provided. An object of the present invention is to provide a sewing machine capable of improving the appearance of finished products having uniform sizes and, further, appropriately setting the size of the raised portion as necessary.

[Means for solving the problem]

According to the present invention, a needle for sewing a tape to a cloth placed on the needle plate and a nipple for pressing the cloth freely move up and down synchronously with each other at a position above the needle plate. Equipped,
The nipple is a holding body that holds the sewing tape, which is supplied along the body of the nipple, between a needle point and an intermediate point of a descending locus of the needle to a needle drop position. In addition, the nipple is provided with adjusting means for changing the position of the holding body so that the position where the tape is held between the holding body and the needle tip is changed up and down.

[Action]

In the process of lowering the needle, the tape whose front part is sewn to the cloth and the supply side after the tape is above the cloth is pinched between the pinching body and the needle tip at a position where the intermediate position floats from the cloth. The needle tip is caught on the tape. When the needle is further lowered, the portion of the tape caught by the needle tip is lowered as it is to the cloth, where it is sewn. Therefore, there is a slack between the part of the tape already sewn on the cloth and the part sewn on the cloth as described above,
The slack portion rises from the cloth.

〔Example〕

Hereinafter, drawings showing an embodiment of the present application will be described. First
4 to 4, reference numeral 1 denotes a nipple,
Through a nipple drive member provided on the head of the sewing machine. As is well known, the nipple drive member can move up and down in synchronization with the needle of the sewing machine and can rotate.

Hereinafter, the nipple 1 will be described in detail. The nipple 1 includes a main body 3 and a holding body 4 attached to the main body. First, the main body 3 will be described below. Reference numeral 5 denotes a main body portion of the main body, and a fastening piece 6 for the connecting tool 2 is integrally formed on the upper side, and a lower surface is an oblique guide surface 7 for guiding the tape. Is provided with a needle passage hole 8 which also penetrates the stopper piece 6. The fastening piece 6 is inserted into a fastening hole 2a of the connecting tool 2 and fixed with a set screw 2b. Reference numeral 10 denotes a hanging piece integrally formed with the lower end of the main body portion 5, the lower surface of which is a pressing portion 11 for pressing a cloth or a tape, and the side surface is an inverted wall 12. The left and right lower edges of the hanging piece 10 are cut out as shown in the figure, and serve as tape escape portions 13. Next, reference numerals 14 and 14 denote a pair of left and right guide bodies.
The guide walls 14a, 14a formed integrally with the guide wall 14a and, if necessary, a groove width adjusting piece 17 used to be attached to the guide wall 14a, the inner wall surface of the guide walls 14a, 14a or the groove width adjusting piece. The inner surface of 17 functions as a guide section for guiding the tape. Reference numeral 15 denotes a tape guide groove formed by the lower surface 7 and the side surface 5a of the main body portion 5 and the guide portion.
The groove width adjusting piece 17 is attached to the inside of the guide wall 14a by a screw rod 18 with a stop. In addition, a plurality of thin adjusting plates 17 are prepared, and the width of the guide groove 15 can be variously changed by changing the number of the adjusting plates 17, and one guide wall 14a and the other guide wall are provided. The position of the guide groove 15 in the lateral width direction can be changed by changing the number of sheets to be attached to 14a. Reference numeral 19 denotes a rod for positioning the groove width adjusting pieces 17 relative to each other.
19a, 19a are inserted into through holes provided in the groove width adjusting piece 17. The intermediate portion 19b functions as a guide piece for a second tape as described later. Incidentally, as the above-mentioned adjusting pieces, those having different thickness dimensions as indicated by reference numerals 20 and 21 may be used. Next, reference numeral 23 denotes a screw rod screwed into a screw hole provided in the guide wall 14a, which is exemplified as a means for adjusting the slack size of the tape, and the leading end portion 24 thereof functions as an adjusting piece. ing. still
Reference numeral 25 denotes a spring for preventing the screw rod 23 from being loosened.

Next, the holding body 4 is formed by press-forming a metal plate, and its base 4a is attached to the guide wall 14a of the main body 3 by a screw rod 27 for fastening and a pressing spring 28. As shown in FIG. 5 (D), for example, as shown in FIG. 5 (D), a state in which the base part 4a is elastically pressed by the pressing spring 28 and the tip part 4b of the holding body faces the guide surface 7 in the main body 3 is attached. So that it can be separated elastically. Incidentally, reference numeral 29 denotes a contact piece formed integrally with the holding body 4, and is opposed to the distal end portion 24 of the adjuster 23. As the above-mentioned sandwiching body, various types as indicated by reference numerals 30 to 33 are prepared according to the width of the guide groove 15 and the position in the left-right direction.

Next, an operation of sewing a tape on a cloth by a sewing machine having a nipple having the above-described configuration will be described.

First, by turning the adjusting tool 23 to adjust the in-out size of the adjusting piece 24, as shown in FIG.
The following is a description of a case in which a gap is formed between the leading end 4b and the guide surface 7 so that the tape can pass freely. In FIG. 5, reference numeral 40 denotes a needle plate of the sewing machine, 41 denotes a cloth to be moved along the upper surface of the needle plate 40, and 42 denotes a tape to be sewn to the cloth 41. It is supplied from. Reference numeral 43 denotes a well-known needle provided at a position above the needle plate 40, which can be freely lowered and raised toward the needle hole 40a of the needle plate 40. 44 and 45 indicate an upper thread and a lower thread for sewing, respectively.

First, the nipple 1 and the needle 43 descend from the state shown in FIG. 5A as shown in FIG.
Press 41 and tape 42 down. Next, the needle 43 is still lowered, and the tape 42 on the holding body 4 is sandwiched between the needle tip 43a and the holding body 4 as shown in FIG.
Caught on The needle 43 still descends and pushes the pinch body 4 away as shown in FIG. 4D, and its tip heads toward the cloth 41 with the tape 42 hooked. With the needle 3 still descending, the tape 42 is lowered to the cloth 41 as shown in FIG. 7E, and the needle 43 pierces the cloth 41. In this state, the upper thread 44 and the lower thread 45 are entangled by the well-known action of the shuttle in the sewing machine. Thereafter, as the needle 43 moves up, the clamp returns to the original position by the urging force of the spring 28, and then the nipple 1 rises again to the position shown in FIG. 5 (A). Thus, the tape 42 is sewn to the cloth 41 by the upper thread 44 and the lower thread 45.

In the above process, the needle 43 is moved to the needle drop position, that is, the needle hole 40a.
(C) at the middle point of the descending locus descending to the position
As shown in (D), the needle 42a is caught on the cloth 41, and then the tape 42 is lowered to the cloth on the needle drop position as shown in FIG. Sewn. As a result of such continuous sewing, the tape 42 is sewn to the cloth 41 with, for example, a frilled edge as shown in FIG.

Next, FIGS. 7 to 10 show a state in which the holding body 4 is largely separated from the guide surface 7 by operating the adjusting tool 23. FIG. In this case, the needle 43 descends from the state shown in FIG. 7 (the state corresponding to FIG. 5B) to the state shown in FIG. 8 (the state corresponding to FIG. 5C). Then, the tape 42 is pinched between the needle tip 43a and the pin body 4,
The needle tip 43a is hooked on the tape 42. Then, the needle tip 43a carries the hooked portion of the tape 42 toward the cloth 41 immediately below the tape 42 as shown in FIG. In this case, since the needle tip 43a, which is apparent from the drawing, is hooked on the tape 42 at a relatively low position, the slack 42a of the tape 42 when the tape 42 at that portion is sewn to the cloth 41 is compared as shown in FIG. Target size. By continuing the sewing in such a state, the tape 42 becomes a slightly sewn sewing state on the cloth 41 as shown in FIG.

When the tape is sewn in a loop shape as indicated by reference numeral 46 in the above-described sewing, the edge of the tape 42 is in a hung state at a portion on the outer peripheral side of the loop. However, even in such a state, the escape portion 13 is formed in the nipple main body 3, so that the edge portion 42b of the tape in a hung state can enter the escape portion 13 as shown in FIG. it can. Therefore, the sewing of the loop 46 as described above can be performed without any trouble.

Next, FIGS. 12 to 17 show a case where the adjusting piece 24 is retracted by operating the adjusting tool 23 so that the leading end 4b of the holding body 4 sandwiches the tape 42 between the guiding piece 7 and the guide surface 7. It is shown. When the tape is sewn in this state, when the nipple 1 is lowered from the state shown in FIG. 12 (the state corresponding to FIG. 5A), the pinched portion is directly lowered. Then, the tape 42 between the pinched portion and the portion already sewn to the cloth 41 cannot move rightward in the drawing due to the presence of the reversing wall 42, so that the nipple 1 further descends. When the state shown in FIG. 13 (the state corresponding to FIG. 5 (B)) is reached, it bends in the shape of a letter as shown. In this state, if the needle 43 descends,
43a hooks the tape 42 on the sandwich 4 as shown in FIGS. When the needle 43 is still lowered from this state, the needle pushes back the holding body 4, and as shown in FIG.
Head for. Then, the tape 42 is sewn to the cloth 41 in that state, that is, the state in which the tape 42 is folded threefold. By continuing the sewing in such a state, the tape 42 becomes the 17th.
It is sewn to the cloth 41 with the tack removed as shown in the figure.

Next, FIGS. 18 and 19 show a state in which a second tape 47 is sewn to the cloth 41 in addition to the above-mentioned tape. As shown in FIG. 18, the second tape 47 is positioned between the left and right guides and at a position avoiding the space between the holding body 4 and the needle 43, that is, at the lower side of the holding body 4, It is inserted into the insertion passage formed on the upper side. In this state, the tape 42 and the second tape 47 are superposed. Then, by performing the same sewing operation as in the above case, the tape 47 is flat along the cloth 41,
Further, the tape 42 is sewn on the upper side of the tape 47 in a state where slacks of various dimensions are taken in the same manner as in the case described above.

Next, FIG. 20 shows a state in which a wide tape 50 is sewn. The adjusting piece 17 is not used, and a holding member indicated by reference numeral 32 is used.

Next, FIG. 21 shows a case in which tapes 51 of different widths are sewn in a state where the tapes 51 are biased to one side (the left side in the figure), and the left and right guide walls 14a, 14a have different numbers of adjustments respectively. Piece 1
7 is attached.

Next, FIG. 22 shows a state in which the sewing is performed in a state where the tape 42 is further deviated from the case of FIG. 21, and the holding member indicated by reference numeral 33 is used.

Next, FIG. 23 to FIG. 28 show a state in which the tape 53 having a coarse texture is sewn to the cloth 41 by a sewing machine provided with the nipple.

First, FIG. 23 shows a state in which the tape 53 is sewn with an intermediate slack amount (the same state as that shown in FIG. 5).

FIG. 24 shows the same state as that of FIG. 23, and shows a state where the sewing is sewn in a state of being unevenly distributed on one side. In this case, the relationship between the cloth and the tape is such that the edge 53a of the tape 53 is greatly raised from the cloth 41 as shown in FIG. Next, FIG. 26 shows a state in which the above-described tape is sewn in a state where the slack amount is reduced and the tape is unevenly distributed. The relationship between the cloth and the tape 53 in this case is as shown in FIG.

Next, FIG. 28 shows a state similar to that of FIG. 26 and a state where the edge of the tape is sewn to the cloth 41.

〔The invention's effect〕

As described above, according to the present invention, when the tape 42 is sewn to the cloth 41, the tape 42 is slackened, and various portions thereof are three-dimensionally lifted from the cloth 41 as shown in FIGS. It can be sewn in a state, and has the effect of exhibiting three-dimensional decorativeness.

Moreover, when the tape 42 is slackened, the point where the tape 42 has already been sewn to the cloth (see the symbol A in FIG. 5C).
The needle tip 43a is engaged with the tape 42 at an intermediate position between the tape 42 and the point on the supply side of the tape 42 (see reference numeral B in FIG. 5C), that is, at a point where the tape 42 is floating from the cloth 41. Even if it is a thing, since the needle tip 43a is hooked on the tape 42 by sandwiching the tape 42 of the above-mentioned point between the holding body 4 and the needle tip 43a, the tape 42 is oblique to the descending direction of the needle 43 at the above-mentioned point. Even if the tape 42 is smooth or the surface of the tape 42 is smooth and slippery, the above-mentioned hooking can be surely performed, and there is a feature that the slack of the accurate pitch can be made. . This means that when the tape 42 is sewn onto the cloth 41 one after another, the magnitude of the lifting of the tape 42 due to the slackness is uniform, and there is a utility that the appearance of the finished product can be improved.

Further, in the present invention, the position at which the tape 42 is sandwiched between the clamp body 4 and the needle tip 43a is changed up and down.
Since the adjusting means 23 for changing the position of the holding member is provided, there is an effect that the size of the floating portion 42a can be appropriately set as needed.

Further, by providing an insertion passage for inserting the second tape 47 in a superposed manner with the tape 42 sandwiched between the holding body 4 and the needle tip 43a, the lower part of the three-dimensional tape is raised. There is also an effect that different kinds of tapes can be sewn in a laid state.

[Brief description of the drawings]

1 is a perspective view, FIG. 2 is a view from the direction of arrow II, FIG. 3 is an enlarged sectional view taken along line III-III, and FIG. 4 is an exploded perspective view of a nipple. FIG. 5 and FIG. 5 are vertical sectional views for explaining the state of sewing the tape to the cloth.
7 is a perspective view showing a state in which the tape is sewn on the cloth, FIGS. 7 to 9 are longitudinal sectional views showing a state in which the tape is sewn with different slack amounts, and FIG. 10 is a view in FIGS. FIG. 11 is a perspective view showing a state in which the tape is sewn as shown in FIG. 11, FIG. 11 is a partially cutaway view for explaining the function of the escape portion,
12 to 16 are longitudinal sectional views showing a state in which the tape is sewn with a different slack amount, and FIG. 17 is a longitudinal sectional view of FIG. 12 to FIG.
FIG. 18 is a perspective view showing a state in which the tape is sewn as shown in the figure, FIGS. 18 and 19 are longitudinal sectional views showing a state in which the two tapes are sewn to the cloth, and FIG. FIG. 21 is a rear view showing the relationship between the tape and the nipple (a view from the same direction as FIG. 2); FIGS. 21 and 22 are rear views showing the relationship between the tape and the nipple when the tape is unevenly distributed; FIG. 28 to FIG. 28 show a state in which a tape having a coarse weave is sewn, and FIGS. 23, 24, 26 and 28 are perspective views, and FIG.
FIG. 27 is a sectional view taken along line XXV-XXV, and FIG. 27 is a sectional view taken along line XXVII-XXVII. 1 nipple, 4 nipple, 41 cloth, 42 tape, 43 needle, 43a needle tip.

Claims (2)

(57) [Claims] 1. A needle for sewing a tape to a cloth placed on a needle plate and a nipple for pressing the cloth are freely movable vertically above the needle plate. The nipple is provided so that the sewing tape supplied along the main body of the nipple is sandwiched between the needle tip at an intermediate point of a descending locus to a needle drop position of the needle. In addition, the nipple is provided with adjusting means for changing the position of the holding body so that the position where the tape is held between the holding body and the needle tip is changed up and down. sewing machine. 2. A nipple having an insertion passage for inserting a second tape in a superposed manner with a tape sandwiched between the clamp and the needle tip at a position avoiding between the clamp and the needle. The sewing machine according to claim 1, further comprising: