JPH11114253A - Hook-eye fixture sewing machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To simplify changing the number of needles between fitments when sewing intervals of hooks or eye fitments are changed in a hook-eye fitment sewing machine. SOLUTION: In a single needle lock stitch zigzag sewing machine 80 provided with an upper shaft 87 for driving a needle 83 and a cam shaft 25 provided with two pieces of feeding cams 36 and 37 for feeding a hook H or an eye E to a sewing position by a fitment feeding mechanism 35, rotation of the cam shaft 25 is independently rotated to rotation of the upper shaft 87 by means of a servo motor 30 (a pulse motor can be used too) and the servo motor 30 is controlled according to a program of a sewing pattern inputted in advance in a control part. It is possible thereby to change arbitrarily the rotation of the cam shaft 25 to the rotation of the upper shaft 87.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sewing machine for sewing a large number of hooks and eye fittings such as brassieres and body suits on a long tape material at a predetermined interval automatically. It is.

[0002]

2. Description of the Related Art Conventionally, hook-and-eye stitch sewing machines (hereinafter referred to simply as "hook-and-eye stitch sewing machines").
7, a folding guide 45 for folding a long tape material T (hereinafter, simply referred to as "tape") and a tape motor T are transferred by an operation of a pulse motor 51, as shown in FIG. Roller feed mechanism 50
A metal fitting supply mechanism 35 having a holding tool 41 for supplying a hook metal H and an eye metal E (hereinafter, simply referred to as “hook” and “eye”) from the metal chute 43 to the sewing portion 82; And a single-needle lockstitch stitching sewing machine 80 having a needle 83 and a needle swing mechanism 85 to sew the eye E and the tape E on the tape T. This is performed by exchanging the supply mechanism 35 and the bracket chute 43. still,
FIG. 7 shows a sewing machine for the eye E.

The needle swing mechanism 85 and the metal fitting supply mechanism 3
5 is a one-needle lockstitch staggered sewing machine 8 as shown in FIG.
0 (hereinafter simply referred to as a “sewing machine”). A needle swing cam 32 and two supply cams 36 mounted on a cam shaft 25 provided on a worm 88 fixed to an upper shaft 87 via a worm wheel 89. 37.

The hook and eye stitch sewing machine will be described with reference to, for example, an eye stitch sewing machine. First, as shown in FIG. 7, a roller feeder arranged behind the sewing machine 80 (left side in FIG. 7) as shown in FIG. When the tape T is pulled out from the tape roll R disposed in front of the sewing machine 80 (right side in FIG. 7) by the operation of the mechanism 50 and the tape T is transported rearward (in the direction of the arrow Q), the tape T When the sewing machine 80 is operated, the eye E is supplied to the sewing machine sewn portion 82 via the metal fitting supply mechanism 35 between the previously folded tapes T by the folding guide 45 as shown in FIG. The needle swinging mechanism 85 is operated, and as shown in FIG.
To be sewn.

In the case of a hook sewing machine, the hook H is supplied between the folded tapes T as shown in FIG. 14 by the metal fitting supply mechanism 35, and then, as shown in FIG. Sewn on the tape T.

[0006]

The hook-and-eye sewing machine described above has the following disadvantages. a) The upper shaft 87 of the sewing machine 80 for operating the needle 83, the needle swing cam 32 and the metal supply mechanism 35 for operating the needle swing mechanism 85.
Is rotated via the worm 88 and the worm wheel 89, for example, the sewing machine 80 is activated and the needle 83 sew 23 needles. And the cams 32, 36, 3
In the case where a cam configured to sew one eye E to the tape T with a needle movement (sewing pattern) as shown in FIG. With the eye sewing machine provided with the cams 32, 36, and 37, the sewing interval of the eye E is changed from 19.1 mm (standard interval) as shown in FIG. 10 to 12.7 mm as shown in FIG. In order to sew narrowly at a small interval, a straight stitch portion L between adjacent eyes E to E (FIG. 9)
Between the fifteenth stitch 15 and the next first stitch 1) must be shortened. That is, in the straight stitch portion L, the transfer amount (dimension) of the tape T by the roller feed mechanism 50 performed after the sewing machine 80 sew one stitch must be reduced. This means that sewing is performed with a larger number of stitches than necessary between fixed dimensions, resulting in a wasteful sewing pattern and reduced productivity.

To widen the sewing interval of the eye E from the standard interval of 19.1 mm as shown in FIG. 10 to 25.4 mm (large interval) as shown in FIG.
The straight stitch portion L between the adjacent eyes E to E must be lengthened. That is, in the straight stitch portion L, the transport amount (dimension) of the tape T by the roller feed mechanism 50 performed after the sewing machine 80 has sewn one stitch has to be increased. This increases the interval between stitches, lowers the sewing strength, and makes it easy for the cloth to peel off.

B) To change the number of stitches between the adjacent eyes E to E to an appropriate number, the worm 88, the worm wheel 89 and the supply cams 36 and 37 must be replaced. Replacing them requires disassembling and assembling the upper shaft 87, the camshaft 25 and their related parts, which is time-consuming and expensive for the operator. For this reason, at present, the number of stitches is not changed by the user, and a hook / eye stitch sewing machine dedicated to a certain number of stitches is unavoidably used even with an inappropriate number of stitches.

[0009]

SUMMARY OF THE INVENTION The present invention has solved the above-mentioned problem, and has a servomotor (a pulse motor is also possible) without interlocking the cam shaft 25 with the upper shaft 87 of the sewing machine 80.
The rotation of the cam shaft 25 is controlled arbitrarily with respect to the rotation of the upper shaft 87 in the straight stitch portion L between the adjacent hooks and the eye by using The number of stitches in the straight stitch portion L between the hooks and the eyes is arbitrarily changed so that the stitch interval becomes substantially constant.

That is, the first aspect of the present invention is that the upper shaft 87 for operating the needle 83 and the hook H or the eye E are connected to the metal fitting supply mechanism 35.
And a cam shaft 25 provided with two supply cams 36 and 37 for supplying to a sewing position by a sewing machine.
5 is a hook and eye fitting sewing machine configured to independently rotate the rotation of No. 5 by a pulse motor or a servomotor 30.

A second aspect of the present invention is that an upper shaft 87 for operating a needle 83 having a worm 88, a cam shaft 25 having a worm wheel 89, and a hook H or an eye mounted on the cam shaft 25. In a single-needle lockstitch stitch stitch sewing machine 80 having two supply cams 36 and 37 for supplying E to a sewing position by a metal fitting supply mechanism 35, a gear 69 or a timing pulley 71 is integrated with one end of the worm 88. The worm 88a integrated with the gear 69 or the worm 88b integrated with the timing pulley 71 is fixed to the upper shaft 87.
To be freely rotatable with respect to the camshaft 2
Pulse motor or servomotor 3 provided near the side of 5
0 is transmitted to the gear 69 of the worm 88a or the timing pulley 71 of the worm 88b via the gear 70 or the timing belt 72, so that the camshaft 25 is independent of the rotation of the upper shaft 87. Alternatively, a hook and eye fitting sewing machine configured to be rotated by the servomotor 30 is provided.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, typical embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a perspective view schematically showing each mechanism of a hook and eye sewing machine according to the present invention, which is simplified from the left front side. In FIG. 1, the right side is the front part of the hook and eye sewing machine, and the left side is the rear part. In the process of feeding the tape T from the front to the rear as shown in the direction of the arrow Q, in the case of FIG. 1, the eyes E (or hooks H) are automatically sewn to the tape T at predetermined intervals. .

Reference numeral 80 shown by a two-dot chain line in FIG. 1 is a known one-needle lockstitch staggered sewing machine, and the sewing machine 80 has an upper shaft 87.
Needle bar up / down mechanism 84 that moves needle 83 up and down by rotation of
And a needle swing mechanism 8 for moving the needle 83 left and right via the needle swing cam 32 and the horizontal rod 86 by the rotation of the cam shaft 25.
5 is provided.

A horizontal camshaft 25 is provided rotatably at a lower center of the upper shaft 87 of the sewing machine 80 in a direction orthogonal to the upper shaft 87, and a timing pulley 26 ( A large diameter pulley is provided, and the rotation of a servomotor 30 fixed to a support bracket 29 (indicated by a two-dot chain line) on the side thereof is rotated by a timing pulley 28 (small diameter pulley), a timing belt 27 and the timing pulley 26. The transmission is transmitted to the cam shaft 25.

The timing pulley 2 of the cam shaft 25
Reference numeral 6 is designed to minimize the effect of backlash on the camshaft 25 by using a pulley having several times the number of teeth (the pulley diameter is several times larger) than the timing pulley 28 of the servo motor 30. At the same time, the servomotor 30 is designed to operate the camshaft 25 with a relatively small torque.

The cam shaft 25 is provided with the needle swing mechanism 8.
5 are fixed, and two supply cams (groove cams) 36 and 37 for controlling a metal supply mechanism 35 for supplying the eye E (or hook H) are fixed. I have.

A cam roller is engaged with the needle swing cam 32. The cam roller is connected to a horizontal rod 86 of the sewing machine 80 via a connecting mechanism 34 including a swing lever, a link, a joint, and the like. It is connected. The horizontal rod 86 is configured to swing the needle 83 right and left by horizontally moving a needle bar vertical mechanism 84 provided at the tip thereof under the control of the needle swing cam 32.

On the other hand, a cam roller is engaged with each of the two supply cams 36 and 37, and these cam rollers are connected via connecting mechanisms 38 and 39 each composed of a swing lever, a link, a joint and the like. It is connected to a metal supply slide 40 that is provided horizontally on the right side of the sewing portion 82 and that can move back and forth and left and right.

The supply cam 36 controls the movement of the metal supply slide 40 in the left-right direction, while the supply cam 37 controls the movement of the metal supply slide 40 in the front-rear direction.

In the metal fitting supply slide 40, a holding tool 41 for catching an eye E (or a hook H) provided at the tip thereof is controlled by the two supply cams 36 and 37 to form the sewing machine sewing section 82. And a metal chute 4 for the eye E (or hook H) arranged on the left side of the sewn portion 82
It is configured to move horizontally between the third outlet 44 and the third outlet 44.

A folding guide 45 for folding the tape T pulled out from the tape roll R is provided in front of the sewing portion 82 as shown in FIG. There is a length of about 150 to 350 mm depending on the type of the folded form of the tape T from the outlet 46 immediately before the sewing portion 82 to the inlet 47 in front of the sewing portion 82 along the transfer direction of T (the direction of the arrow Q). The tape T inserted from the entrance 47 of the guide 45 is gradually bent as the tape T advances in the guide 45, and when the tape T exits from the exit 46 of the guide 45, as shown in FIG.
As shown in FIG. 7, the tape T is folded so that both ends are overlapped inside, and the folded portion is overlapped and folded in two.

On the other hand, behind the sewing portion 82,
As shown in FIG. 1, a roller feed mechanism 50 for feeding the tape T in the direction of the arrow Q is provided. The roller feed mechanism 50 is provided with a pulse motor 51 (fixedly provided at the rear of the sewing machine 80). A lower feed roller 52 connected to the lower feed roller 52 is provided.
As shown in FIG. 8, the lower feed roller 52
And an upper feed roller 55 rotatably connected via gears 53 and 54 so as to sandwich the tape T.

The upper feed roller 55 is constantly pressed by a downward spring pressure, and is in pressure contact with the lower feed roller 52. As shown in FIG. 1, the upper feed roller 55 is connected via a lever mechanism. By operating the engaged lifting lever 57, the lifting lever 57 can be lifted from the lower feed roller 52 by about 6 mm.

In the case of a hook-stitch sewing machine, the upper feed roller 55 has a through hole for passing a hook H sewn to a tape T on its outer peripheral surface as shown by a two-dot chain line in FIG. A groove 56 is provided.

In FIG. 1, reference numeral 60 denotes an encoder provided at the right end of the sewing machine 80 via a bracket 81. The encoder 60 is connected to the end of the upper shaft 87 via a joint 61. By detecting the rotational angular displacement of the upper shaft 87 at 60, the displacement of the vertical position of the needle 83 of the sewing machine 80 is detected, and the detection signal is sent to the control unit 65 as shown in FIG. I have.

The control unit 65 controls the encoder 6
By inputting the detection signal output from 0, FIG.
As shown in FIG.
1 and the servomotor 30 for rotating the camshaft 25 are respectively controlled.

In FIG. 2, reference numeral 67 denotes a plurality of sewing patterns programmed in advance in the control unit 65 in order to sew hooks and eyes at various intervals (dimensions). This is a sewing pattern selection switch for selecting a pattern and setting its number. The switch 67 is connected to the control unit 65.
By setting a desired number to 7, the control unit 65 operates to control the servomotor 30 and the pulse motor 51 in accordance with a program of a sewing pattern of the desired number previously input.

That is, by changing the sewing pattern number of the sewing pattern selection switch 67, the controller 6
5 operates to arbitrarily control (including stop) the rotation of the cam shaft 25 with respect to the rotation (number of rotations) of the upper shaft 87 in the straight stitch portion L between the adjacent eyes E to E of the tape T. Accordingly, the number of stitches to be sewn by the sewing machine 80 to the tape T is changed.
When the rotation angle of the upper and lower feed rollers 52, 55 for transferring the tape T in the direction of the arrow Q (see FIG. 1) after the tape T has risen, the tape T is transferred by the sewing machine 80 after the tape T is sewn. The amount (seam interval) can be changed.

In the present invention, as means for rotating the camshaft 25, means for independently rotating the camshaft 25 by the servomotor 30 without interlocking the upper shaft 87 and the camshaft 25 has been described. As shown in FIG. 3, a gear 69 is integrally fixed to the worm 88, and a worm 88 integrated with the gear 69 is used as a means utilizing the worm 88 and the worm wheel 89.
a to be freely rotatable with respect to the upper shaft 87,
The rotation of the servomotor 30 provided near the side of the camshaft 25 is transmitted through a gear 70 to the gear 69 of the worm 88a.
, The camshaft 25 may be rotated by the servomotor 30 in a state independent of the rotation of the upper shaft 87.

As shown in FIG. 4, a timing pulley 71 is integrally fixed to the worm 88, and a worm 88b integral with the timing pulley 71 is attached to the upper shaft 87 so as to be freely rotatable. Camshaft 25
Of the worm 88b is transmitted to the timing pulley 71 of the worm 88b via the timing pulley 73 and the timing belt 72 so that the cam shaft 25 is independent of the rotation of the upper shaft 87. May be rotated by the servo motor 30.

3 and 4, the basic structure of the conventional sewing machine can be almost used, and the rotation of the cam shaft 25 can be arbitrarily controlled via the servo motor 30.

Further, in the above-described embodiment of the present invention, the transfer of the tape, the operation of the sewing machine needle, the supply of the hook and the eye,
Each operation such as swinging the sewing machine needle is controlled by microcomputer control or sequence control.

[0033]

Next, the operation of the hook-and-eye stitching machine constructed as described above will be described. The eye E is stitched by the eye-stitching sewing machine shown in FIG.
mm) will be described. First, as shown in FIG. 1, the operator pulls out the tape T from the tape roll R, and passes the tape T through the folding guide 45 arranged in front of the sewing portion 82 to be folded.

Next, the exit 4 of the bending guide 45
6, the folded tape T is pulled out as shown in FIG. 16 and passed through the sewing portion 82 of the sewing machine.

Next, as shown in FIG. 1, the upper feed roller 55 is lifted by operating the lift lever 57 of the upper feed roller 55 disposed behind the sewing portion 82, and the folded tape T Through the tip of

Next, the upper feed roller 55 is lowered and pressed against the folded tape T.

Next, as shown in FIG. 10, the eye E is set to one at the sewing pattern selection switch 67 shown in FIG.
9.1 Set the number of the sewing pattern to be sewn at intervals of 1 mm. Thus, all preparations before the start of operation by the operator are completed.

Next, when the operator turns on a switch (not shown) for starting the eye stitch sewing machine, automatic operation starts. The servo motor 30 shown in FIG. 1 is operated, and the two feed cams 36 and 37 and the
Rotates.

Then, as shown in FIG. 1, the holding tool 41 of the fitting supply slide 40 catches the eye E from the outlet 44 of the fitting chute 43 for the eye E by the action of the supply cams 36 and 37, and the eye E E is supplied into the gap of the folded tape T located at the sewing portion 82 (see FIG. 16).
I do.

At the same time, the upper shaft 87 of the sewing machine 80 is also rotated, and the first stitch 1 is sewn to the tape T as shown in FIG. Then, when the needle 83 rises by sewing the first needle 1, the needle 83 moves rightward (upward in FIG. 10) by about 2.5 mm by the action of the needle swing cam 32, and the second needle 2 is sewn. .

Next, when the needle 83 is raised by sewing the second needle 2, the needle 83 is moved by about 2.5 mm to the left (downward in FIG. 10) by the action of the needle swing cam 32, and
Is sewn. Thereafter, after the sewing of the needle 83 is completed, the needle 83 moves to the right and left in the same manner as described above by the operation of the needle swing cam 32, and the sewing is performed to the seventh stitch 7. During this time, the holding tool 41 of the fitting supply slide 40 that has supplied the eye E holds the eye E on the tape T.

Next, as shown in FIG. 1, the pulse motor 51 of the roller feed mechanism 50 is operated, and the lower feed roller 5 is driven.
2 and the upper feed roller 55 are rotated to transport the tape T rearward (in the direction of the arrow Q) by about 2.8 mm as shown in FIG. At this time, the holding tool 41 of the metal fitting supply slide 40 also keeps the eye E by the action of the supply cams 36 and 37, and moves backward (in the direction of the arrow Q) in synchronization with the backward transfer of the tape T by about 2 hours. .8 mm.

Next, when the needle 83 sew the eighth stitch 8, the pulse motor 51 is operated again to transfer the tape T backward by about 2.8 mm, and at the same time, the holding tool 41 is sewn.
In the state where the eye E is held by the action of the supply cams 36 and 37, the tape T is moved backward by about 2.
Transfer by 8 mm.

Next, when the needle 83 sew the ninth stitch 9, the needle 83 is moved to the right by about 2.5 mm by the action of the needle swing cam 32, and the tenth stitch 10 is sewn.

Next, the needle 83 is moved 2.5 mm to the left by the action of the needle swing cam 32, and the eleventh stitch 11 is sewn. Thereafter, after the needle 83 has been sewn, the needle swing cam 32 moves to the right and left in the same manner as described above to sew up to the fifteenth needle 15. During this time, the holding tool 41
Is caused by the action of the supply cams 36 and 37,
Away from the left, exit 4 of the bracket chute 43
Return to 4.

Next, the holding tool 41 of the fitting supply slide 40 is moved from the outlet 44 of the fitting chute 43 to a new eye E.
And starts to supply the eye E onto the tape T located at the sewing portion 82 of the sewing machine. At this point, the work of sewing the eye E to the tape T is completed.

Next, the sewing of the straight stitch portion L is started. First, when the pulse motor 51 is operated and the tape T is moved backward by about 1.5 mm as shown in FIG.
3 sew the 16th stitch 16 as shown in FIG. Hereinafter, after the needle 83 has sewn the tape T, the pulse motor 5
9 and 10, the tape T is alternately transported rearward by about 1.5 mm as shown in FIGS.

When the needle 83 has sewn the 23rd stitch 23 and moved the tape T backward by about 1.5 mm, the holding tool 41 of the metal fitting supply slide 40 moves the eye E to the tape T where the eye E is located at the sewing portion 82 of the sewing machine. Supply to the upper position. Less than,
By repeating the above operation, the eye E is set to 19.1 mm according to the sewing pattern of the number set in the sewing pattern selection switch 67, that is, as shown in FIG.
And sew the tape T one after another.

It should be noted that an eye E is provided on the tape T at a small interval (1
In order to sew alternately at 2.7 mm) and the standard interval (19.7 mm), the eye E is alternately sewn at the interval of 12.7 mm and 19.7 mm to the sewing pattern setting switch 67 as shown in FIG. Set the number of the sewing pattern to be attached. Then, the program of the control unit 65 operates to control the rotation of the servo motor 30 and the pulse motor 51, respectively, and thereby, according to the sewing pattern of the number set in the sewing pattern selection switch 67, that is, as shown in FIG. When the eyes E are sewn at small intervals, the number of stitches (the number of stitches) of the needles 83 in the straight stitch portion L between the adjacent eyes E to E is set to five, and
The transfer amount (dimension) of the tape T by the upper and lower feed rollers 55 and 52 after sewing is set to 1.42 mm;
When the eyes E are sewn at standard intervals, the number of stitches in the straight stitch portion L is set to 9 stitches, and the transfer amount of the tape T is set to 1.5 mm, so that the eyes E are 12.7 mm and 19.1 mm. Sewing can be performed one after the other at intervals.

Also, an eye E is provided on the tape T at a standard interval (19.
1mm) and a large interval (25.4mm), the sewing pattern selection switch 67 is used to select a sewing pattern for sewing the eyes E alternately at intervals of 19.1mm and 25.4mm as shown in FIG. Set the number. Then, the program of the control unit 65 operates to control the rotation of the servo motor 30 and the pulse motor 51, thereby controlling the rotation of the servo motor 30 and the pulse motor 51 in accordance with the sewing pattern of the number set in the sewing pattern selection switch 67, that is, as shown in FIG. When sewing E at standard intervals, the number of stitches (the number of stitches) of the straight stitch portion L between the adjacent eyes E to E is set to 9
When the amount of transfer (dimension) of the tape T by the upper and lower feed rollers 55 and 52 after the needle 83 is sewn to 1.5 mm and the eye E is sewn at large intervals, By setting the number of stitches of the linear stitch portion L to 12 stitches and setting the transfer amount of the tape T to 1.52 mm, the eyes E can be sewn alternately one after another at intervals of 19.1 mm and 25.4 mm. . Therefore, any combination of the small interval and the large interval is possible by programming in advance.

Although the above description has been made with respect to the eye E, FIG.
3. Regarding the hook H as shown in FIG. 14, the holding chute 41 of the fitting chute 43 and the fitting supply mechanism 35 as in the prior art.
By simply changing the shape of the cam grooves of the three cams 32, 36 and 37, the sewing machine can be operated in a desired and appropriate manner with the same configuration as described above.

[0052]

According to the present invention, when changing the sewing interval of the hook or eye fitting, the sewing pattern selection switch 67 is used.
The number of stitches of the straight stitch portion L between adjacent hooks and eyes is controlled by controlling the servo motor 30 (possible with a pulse motor) by operating the control unit 65 based on the signal. Since the pitch can be easily changed, the stitch pitch of the sewing machine between the hooks and the eye can be made appropriate. When the distance between hooks and eyes is small, the number of needles can be reduced and efficiency is improved.On the other hand, when the distance is large, the number of needles can be increased and the stitch pitch is appropriate, and the sewing force is properly adjusted. You can do it. Therefore, a high-quality product with good appearance can be efficiently produced with an appropriate sewing force.

Further, according to the present invention, the cam shaft 25 is independently rotated by using the servomotor 30 via the worm 88 and the worm wheel 89 without being linked to the upper shaft 87 of the sewing machine 80. Therefore, the mounting accuracy (particularly, the distance between the shafts and the orthogonality) of the camshaft 25 to the upper shaft 87 does not require a particularly high precision as compared with the conventional mechanism.

According to the present invention, the worm 88 and the worm wheel 89 and the worm wheel 89, which are always necessary to change the stitching interval between the hooks or the eyes and to properly adjust the stitch pitch between the hooks or the eyes. Supply cam 36, 3
As a result, there is no need to replace the upper shaft 87, the camshaft 25, and the parts related to the replacement of the upper shaft 87, the camshaft 25, and the related parts.

[Brief description of the drawings]

FIG. 1 is a perspective view schematically showing a main part of a hook and eye fitting sewing machine according to the present invention.

FIG. 2 is a block diagram of a control circuit according to the present invention.

FIG. 3 is a front view showing another embodiment of the camshaft operating means of the present invention.

FIG. 4 is a front view showing still another embodiment of the camshaft operating means of the present invention.

FIG. 5 is a plan view of a tape in which eye fittings are alternately sewn at a small interval and a standard interval with the eye fitting sewing machine according to the present invention.

FIG. 6 is a plan view of a tape in which eye fittings are alternately sewn at a standard interval and a large interval by the eye fastener sewing machine of the present invention.

FIG. 7 is a perspective view schematically showing an essential part of a conventional hook and eye fitting sewing machine.

FIG. 8 is a front view of a conventional roller feed mechanism.

FIG. 9 is a needle movement diagram for sewn an eye fitting.

FIG. 10 is a plan view of a tape on which eye fittings are sewn at standard intervals by the needle operation of FIG. 9;

FIG. 11 is a plan view of a tape obtained by sewing eye fittings at intervals smaller than a standard interval by the needle operation of FIG. 9;

FIG. 12 is a plan view of a tape in which eye fittings are sewn at intervals larger than a standard interval by the needle operation of FIG.

FIG. 13 is a plan view of a tape on which hook fittings are sewn at regular intervals.

FIG. 14 is a sectional view taken along line AA of FIG. 13;

FIG. 15 is a plan view of a tape on which eye fittings are sewn at regular intervals.

FIG. 16 is a sectional view taken along line BB of FIG. 15;

[Explanation of symbols]

 25 Camshaft 30 Servomotor 35 Hardware supply mechanism 36 Supply cam 37 Supply cam 69 Gear 70 Gear 71 Timing pulley 72 Timing belt 80 Single needle lockstitch stitching sewing machine 83 Needle 87 Upper shaft 88 Worm 88a Worm 88b integrated with gear Worm 89 integrated with pulley 89 Worm wheel E Eye fitting H Hook fitting

Claims (2)

[Claims] 1. An upper shaft 87 for operating a needle 83 and a hook H or an eye E are supplied to a sewing position by a metal fitting supply mechanism 35.
In the single-needle lockstitch stitching sewing machine 80 having the cam shaft 25 having the supply cams 36 and 37, the upper shaft 8
A hook and eye fitting sewing machine configured to independently rotate the rotation of the camshaft 25 by the pulse motor or the servomotor 30 in response to the rotation of the sewing machine 7. An upper shaft for actuating a needle having a worm; a cam shaft having a worm wheel;
A single-needle lockstitch stitching machine 80 having two supply cams 36 and 37 for supplying a hook H or an eye E attached to the cam shaft 25 to a sewing position by a metal fitting supply mechanism 35.
, The gear 69 or the timing pulley 71 is integrally fixed to one end of the worm 88 and the gear 6
The worm 88a integral with the worm gear 9 or the worm 88b integral with the timing pulley 71 is attached to the upper shaft 87 so as to be freely rotatable, while the rotation of the pulse motor or the servomotor 30 provided near the side of the cam shaft 25 is controlled. The cam shaft 25 is transmitted to the gear 69 of the worm 88a or to the timing pulley 71 of the worm 88b via the gear 70 or the timing belt 72, so that the cam shaft 25 is independent of the rotation of the upper shaft 87.
Hook and eye stitch sewing machine configured to be rotated by