JPS63230192A - Automatic wrinkle removing device for 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 (A) Field of Industrial Application The present invention relates to an automatic shirring device for a sewing machine, and more particularly to an automatic shirring device for a sewing machine that forms deformed pleats such as a zigzag type.

(Ol Conventional technology) Conventionally, when deforming pleats are performed using a sewing machine, an automatic pleat removing device attached to the sewing machine is used to form pleats of the desired depth in the fabric as the sewing machine operates. The desired deformed pleats are completely formed by manually moving the pleat removing fabric in both directions relative to the sewing direction, for example in a zigzag pattern.

(c) Problems to be Solved by the Invention However, the deformed pleat removal method using manual operation has problems such as requiring skill and poor working efficiency.

(2) Means and Effect for Solving the Problems Therefore, it is an object of the present invention to provide a deformable automatic shirring device which solves the above-mentioned problems. The details will be disclosed below.

A pleat removal mechanism that automatically forms pleats of a predetermined depth every predetermined number of stitches? A sewing machine equipped with a crimper fabric guide means for displacing the pleat fabric in a transverse direction with respect to the fabric feeding direction, a drive means for the fabric guide means, and a fabric guide means and its drive means. An automatic shirring device is provided, characterized in that it has interlocking means.

The driving action of the driving means is transmitted to the fabric guide means by the interlocking means, and by displacing the pleating fabric, deformed pleats can be completely automatically formed on the fabric. Furthermore, by adjusting the interlocking means, the displacement of the guide means can be adjusted, making it possible to construct pleats of a desired shape.

(E) Embodiments Below, embodiments of the present invention will be described with reference to the accompanying drawings. The automatic shirring device according to the present invention is broadly divided into a known automatic shirring mechanism and a deformed shirring forming mechanism that moves the shirring fabric over time in conjunction with the automatic shirring mechanism.

Further, the deformed pleat forming mechanism includes a drive means interlocked with the horizontal shaft of the sewing machine, a shirring fabric holding means, and a means for connecting the shirring fabric holding means and the drive means.

First, the known automatic shirring mechanism shown in FIG. 1 will be explained. This mechanism is installed across the head 2 and ped 4 of the sewing machine. An eccentric cam 8 is fixed to a rotating shaft 10 on a base plate 6 provided on a sewing machine head 2. The rotating shaft 10 is configured to be rotatable by a drive means of a known sewing machine.

The cam driven member 12 is pivotally mounted 14 on the base plate 6, and includes a driven arm 20 having a curved arm 16 with an eccentric cam 8 at its end and a long groove 18 in the middle, and a base plate integrally attached to the driven arm. 6
14, and a connecting spring 38 (described later) is attached to the end 39.
The support plate 22 has a The long groove 18 of the driven arm 20 is
Shaft 2 rotatably held at the lower end of base plate 6
4 into which the upper end of the connecting lever 26, whose lower end is fitted, is inserted. The upper end of the connecting lever 26 is movable within the long groove 18 by tightening or loosening the wing nut 28. The upper end of the swing lever 30 is fixed to the shaft 24 in contact with the connecting lever 26 . Therefore, the lever 30 swings as the gift 24 rotates.

A support arm 33 of a shirring blade 34 is fitted and fixed into a horizontal leg portion 32 provided at the other end of the swing lever 30, and a horizontal lever 36 is fixed to the other side of the support arm 33. A connecting spring 38 is attached to the end of the horizontal lever 36 farther from the horizontal leg portion 32.
is pivoted 40 times.

Reference numeral 42 represents a coil spring installed between the support plate 22 and the sewing machine head 2, and reference numeral 44 represents a coil spring installed between the support member 46 provided between the sewing machine head 2 and the base plate 6, and the shaft 24. .

Note that 48.50.52.511 is an upper thread guide member, 5
Reference numeral 6 indicates a balance, 58 a needle bar, 60 a sewing machine needle, 61 a fabric presser bar, 62 a fabric presser, and 64 a needle plate metal.

Next, the deformed pleat formation mechanism will be explained. First, let's talk about the driving means. The driving means includes an eccentric cam 66 and a configuration for driving this cam. The eccentric cam 66 has an eccentric cam groove 68, a center hole 69 for mounting the cam 66, and another engagement hole 70. Support stand 7 for eccentric cam 66
2 is fixed on the base plate 7.1 of the deformed pleat formation stirring structure,
A rotary table 78 integrally formed with a rotatable central shaft 76 which fits into the center hole 69 of the cam is provided on the upper surface thereof. The rotary table 78 is provided with a shaft 80 that engages with the engagement hole 70 of the eccentric cam 66, and at the end of the central shaft 76 of the rotary table 78 is a spur gear 86 that meshes with a worm gear 84 attached to a horizontal shaft 82 of the sewing machine. will be established. When the horizontal shaft 82 rotates in the direction of the arrow (FIG. 10) due to the driving of the sewing machine, the spur gear 86 meshing with the worm gear 84 rotates in the direction of the arrow, so that the central shaft 76 also rotates in the same direction.

The connecting means for transmitting the movement of the driving means consists of three levers 88.
,98.122. One end of the L-shaped first lever 88 is pivoted 90 to the base plate 74 in the vicinity of the rotary table 78.
The guide IF D-ra 92 provided at the other end fits into the long groove 102 of the second lever 98, which will be described later. A cam roller 9 that engages with the groove 68 of the eccentric cam 66 is provided on the upper surface of the first lever 88.
4 will be erected.

When placing the eccentric cam 66 on the rotary table 78, the central shaft 76 of the rotary table 78 is inserted into the center hole of the eccentric cam 66, and at the same time, the cam roller 9 is inserted into the engagement hole 70 of the shaft 80. engages groove 68; Further, a set screw 96 is screwed onto the center shaft 76 protruding from the center hole 69 of the eccentric cam 66 to fix the eccentric cam 66 to the rotary table 78. One end of the second lever 98 is pivotally attached to a third lever 122, which will be described later, and the other end is provided with a long groove 102 that engages with the guide roller 92 of the second lever ζ88. The second lever 98 has its rotation angle regulating device 10.
Attach 4. A rotating plate 110 is rotatably provided on a horizontal portion 108 of a base 106 fixed to a base plate 74. The rotating plate 110 and the upper plate 112 are connected to the through hole 109 of the horizontal portion 108.
This upper plate 112 is connected by another clamp 116 to a lower plate 120 which is pivoted 118 to the second lever 98.

Therefore, when the second lever 98 is displaced, the upper plate 112 and the lower plate 12
0 means the stopper 114.1 with the stopper 116 as the core.
It is pivoted to 18 and can be opened and closed. The rotating plate 110 has two control pins 119 and 121 at a predetermined angle (usually 3
0° to 40°) and protrudes downward. 2nd lever 9
The rotation angle of the second lever 98 is regulated by each of these bottles coming into contact with the horizontal plate 108 while the lever 8 is rotating, but the details thereof will be omitted.

The third lever 122 is pivotally attached 124 to the base plate 74 at its end.
L, as already mentioned, the second lever 98 is pivotally supported in its middle part. Further, the third lever 122 is inserted into the fourth lever 128 through a guide hole 126 formed at the other end.
34, it can be screwed freely. The fourth lever 128 is slidably provided in a long groove 136 provided in a guide stand 130 fixed to the base plate 74. Loosen the set screw 134 and move the third lever 122 together with the fourth lever 128 to the guide table 130.
The connection position between the fourth lever 128 and the third lever 122 can be changed by sliding the lever in the long groove 136 bored in the guide hole 126.

A protruding arm 138 is fixed to the other end of the fourth lever 128, and a pleat removing fabric guide section 140 is attached to the end of this arm. This guide portion 140 has a passage hole 142 through which the fabric passes.
has. Reference numerals 144 and 146 indicate protruding arms 138, respectively.
By loosening the set screw 146 and moving the protruding arm 138 in the length direction of the long groove 1411, the position of the guide portion 11Io can be adjusted by moving the protruding arm 138 together with the elongated groove and the set screw. Reference numeral 150 is a sliding plate for the shirring blade 34 attached to the support arms 1 and 18 fixed to the base plate 74. By sliding the entire shirring blade 34 on the upper surface of the sliding plate 150, the shirring operation can be carried out.

Next, the effects of the embodiments according to the present invention will be described.

First, regarding the action of the known shirring mechanism, when the rotary shaft 10 to which the eccentric cam 8 is attached is driven by a known mechanism built into a sewing machine, the cam 8 rotates and the eccentric portion of the shirring mechanism It moves in contact with the inner surface of the curved arm 1G of the driven member 12, and pulls the e-cam driven member 12 downward (toward FIG. 1) using the pivot portion 14 as a fulcrum. At the same time, the connecting lever 2
6 is pulled down in the direction of the arrow (toward FIG. 1) together with the connecting spring 38 attached 39 to the support plate 22 of the cam driven member 12 against the coil spring 42, so that the connecting spring 3
The horizontal lever 36, which is pivotally mounted 40 at A pleat is formed on the pleat removing fabric W on the sliding plate 150. The shaft 24 and the swing lever 30 rotate in the same direction against the coil spring 44.

Next, when the rotating shaft 10 rotates 'lr' and then the eccentric cam 8 moves to the opposite position, the cam driven member 12 is pushed upward in the opposite direction, and the related members move in the opposite direction. Then, the swing lever 30 moves back and the shirring operation is stopped. The ratio between the number of stitches and the number of pleats formed on the pleat-removing fabric W can be adjusted by changing the shape of the eccentric cam 8, and the depth of the pleats to be formed can be adjusted depending on the length of the long groove 18 of the cam driven member 12. This can be carried out by using the thumbscrew 28 to move the connecting lever 26 all the way to the set position, or by adjusting the length of the connecting spring 38 attached to the support plate 22 of the cam follower 12, within a certain range.

Next, the operation of the driving means will be explained.

When the sewing machine is driven, its horizontal shaft 82 rotates in the direction of the arrow (Fig. 10), and the worm gear 8 and spur gear 86 rotate.
The center shaft 76 is rotated in the direction of the arrow. In response to this rotation, the eccentric cam 66 rotates, and the cam roller 94 protruding from the cam groove 68 engages and moves to move the cam roller 94 in the direction of the arrow (Fig. 3). ].As the distance between the first lever 88 and the first lever 88 is narrowed with the guy P roller 92 engaged with the long groove 102 of the second lever 98, the second lever rotation angle regulating device 104
The lower plate 120 and the upper plate 112 are opened at a predetermined angle (FIG. 7), and the second shafts 98 move in the direction of the arrow, sequentially via the three levers 122i and the pivot joint 100. Move it laterally in the direction of the arrow. Third screw A 1.22 with set screw 134
The l-th lenoma 128 connected to the guide table 130 slides within a long groove 136 provided in the guide table 130 within the range of a long hole 132 provided in the guide table 130. Therefore, the shirring fabric guide part 140 attached to the protruding arm 138 at the end of the fourth lever 128 is the same as the fourth shim 128 in a state where the shirring fabric W is supported in its passage hole 142 so that it can pass through. Since it moves in the direction, the pleat removing fabric W is displaced in a direction perpendicular to the fabric feeding direction. A sliding plate 1 is placed on the displaced fabric W.
50 forms pleats b of a predetermined depth. Of course, the seams a are continuously formed on the fabric W.

When the eccentric cam 66 further rotates and the second lever (sc+si) moves in the opposite direction to that described above due to the displacement of the cam roller 94 that is engaged with the cam groove 68, the second lever 98 moves in the opposite direction to the third one. Because it attracts the lever 122, the fourth lever 12
8 is too far displaced in the opposite direction to the above. Therefore, the pleat removing fabric guide portion 140 is displaced in the direction opposite to the pleat removing fabric W'rM description.

Therefore, the pleats C formed at opposite positions and the pleats b formed as described above are deformed in a substantially zigzag shape symmetrically with respect to the seam a (FIG. 11).

In this way, by operating the eccentric cam 66, zigzag deformation folds can be continuously formed.

The adjustment of the fourth lever 128 during lateral movement can be made by changing the screwing position of the setscrew 134, by changing the connection position with the third lever 122, or by changing the position of the shirring fabric guide part 140. The position adjustment is performed using the protruding arm 131 of the fourth lever 128.
This is possible by using a long groove 144 and a set screw 146 for displacement.

Next, the rotation angle regulating device #104 regulates the displacement angle of the second lever 98 to move the third lever 1 by the pivoting portions 124 and 100.
22 is restricted to control the lateral movement of the fourth lever 128.

Control pins 119 and 121 provided on the rotating plate 110
The horizontal part 1 of the base 106 moves according to the displacement of the lever 98.
The displacement of the second lever 98 is restricted within the range where it comes into contact with either side of the lever 08. The optimum displacement regulating angle of the second lever 98 is usually about 30° to 40°.

Further, the sewing machine employed in the present invention is preferably a two-needle sewing machine. By forming two rows of seams on the pleat fabric, it is possible to perform sewing that is durable and does not cause the sewing thread to separate.

(F) Effect The present invention includes a fabric guide means for displacing the pleat removing fabric over time to both sides or one side with respect to the fabric feeding direction, a drive means for the fabric guide means, and a fabric guide means and the drive means for the fabric guide means. This makes it possible to automatically form desired deformed pleats using a means for interlocking the two, and is useful for improving sewing efficiency.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of a sewing machine equipped with an automatic shirring device according to an embodiment of the present invention. FIG. 2 is a perspective view of FIG. 1 seen from the direction of the arrow ■. FIG. 3 is a plan view of an embodiment of the automatic shirring device according to the present invention. FIG. 4 is a plan view of the eccentric cam of the driving means. FIG. 5 is a plan view of the cam support plate and the first lances. FIG. 6 is a plan view of the rotation angle regulating device. FIG. 7 is a plan view showing the operation of the upper and lower plates of the rotation angle regulating device of FIG. 6; 8th
The figure is a side view of the rotation angle regulating device. FIG. 9 is a side view of the rotating plate of the rotating angle regulating device. FIG. 10 is a plan view showing the arrangement relationship between the horizontal shaft of the sewing machine and the central axis of the cam. FIG. 11 is a plan view of an embodiment of a fabric having pleats formed by the pleat removing device according to the present invention. 6... Base plate, 8... Eccentric cam, 12... Cam driven member, 20... Followed arm, 22... Support plate, 26...
...Connection lever, 30...Swinging lever, 34...Folding blade, 38...Connection spring, 66...Eccentric cam,
68...Cam groove, 72...Support stand, 74...Base plate, 76...Center shaft, 78...Rotary table, 82...
・Horizontal shaft, 84... Worm gear, 86... Spur gear, 88... First lever, 92... Guide roller,
9.1...Cam roller, 98...Second lever, 102
...long groove, 104...rotation angle regulating device, 112.
... Upper plate, 120... Lower plate, 122... Third, S
, 126... Guide hole, 128... Fourth lever, 130
... Guide stand, 132 ... Long hole, 134 ... Set screw, 136 ... Long groove, 138 ... Projecting arm, 140.
・・Fabric guide part for removing pleats, 1112 ・・Passing hole,
150...Slip Slope Applicant Shigeo Tsuboi Agent Patent Attorney Sakae Kobayashi Figure 2 15CJ Figure 4 72...Support 98' 92 Figure 6 Figure 7 10'8 Figure 8 Figure 9 +10 82... Lateral just 84... Worm gear 86... Spur gear Figure 10 Figure 11 = 4

Claims (1)

[Claims] 1. In a sewing machine equipped with a shirring mechanism that automatically forms pleats of a predetermined depth for each predetermined seam, the shirring fabric is displaced in a transverse direction with respect to the fabric feeding direction. An automatic pleating device for a sewing machine, comprising a fabric guide means, a drive means for the fabric guide means, and a means for interlocking the fabric guide means and the drive means. 2. An automatic shirring device for a sewing machine according to claim 1, which is equipped with two or more sewing needles. 3. The automatic shirring device for a sewing machine as set forth in claim 1, comprising fabric guide means for displacing the shirring fabric to both sides or one side with respect to the fabric feeding direction. 4. Insert and fix a rotatable central shaft through a gear member driven by the horizontal shaft of the sewing machine into the center of a rotary plate disposed on a support plate provided on a base plate, and connect the central shaft and rotary plate. The center hole and engagement hole of the eccentric cam are respectively fitted to the upright shaft, and the approximately L shape is pivoted to the base plate close to the rotary table.
Claim 1 comprising a driving means formed by a cam roller provided on the letter-shaped first lever engaging with a cam groove of an eccentric cam.
The automatic shirring device for the sewing machine described in Section 1. 5. The guide roller of the first lever, which is pivotably supported on the base plate in close proximity to the rotary table, engages with the second lever provided with a slidable long groove. A fourth lever is pivotally connected to a third lever having a guide hole provided in the guide table, has a fabric guide portion for removing pleats at one end, and has a fourth lever connected to the third lever at the other end and is movable laterally within a groove provided in the guide stand. An automatic shirring device for a sewing machine according to claim 1, comprising interlocking means provided with a lever. 6. The sewing machine according to claim 1, further comprising a shirring fabric holding means attached to the arm of the laterally movable fourth lever and having a guide hole in the center thereof through which the shirring fabric passes. automatic shirring device. 7. An automatic shirring device for a sewing machine according to claim 5, which has a second lever equipped with a rotation angle control device.