JP2716343B2 - Sewing equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sewing apparatus for automatically sewing cloth products such as handkerchiefs.

[0002]

2. Description of the Related Art As shown in FIG. 13, a cloth product A such as a handkerchief having a circular arc at the corner of a cloth Ao such as a pile and the entire outer periphery including the corner is overlock-stitched is conventionally used. Are known. For sewing such a cloth product A, an industrial sewing machine having a cutting device is usually used.

[0003]

By the way, in forming the above-mentioned cloth product A, conventionally, the cloth is sent to the sewing machine by hand and sewn, so that it takes a lot of trouble and a uniform cloth. There was a problem that skill was required to obtain the product A.

An object of the present invention is to provide a sewing apparatus capable of automatically sewing a cloth product having a rounded corner.

[0005]

In order to solve the above-mentioned problems, according to the present invention, a support table and a cloth placed on the support table are pressed, and the centers of curvature of arc-shaped corners formed at four corners are provided. A corner pin is provided at a corner of the corner pin, and a pin is protruded at two equally spaced positions of the corner pin, and a pin between the corner pins of the pin is detachably held to linearly hold the pin. A cloth feeder for moving the
A sewing machine that cuts the peripheral edge of the cloth moved together with the cloth presser plate by the cloth feeder and performs overlock stitching along the cut edge, and at a position where a corner pin of the cloth presser plate faces one side of the sewing machine needle. Stopping means for stopping the cloth feeding device, holding means for rotatably supporting a corner pin facing one side of the sewing machine needle, and moving the cloth holding plate 90 in one direction around the corner pin held by the holding means. And a rotating means for rotating by an angle.

[0006]

In the sewing apparatus having the above-described construction, the cloth placed on the support table is pressed by the cloth presser plate, and the cloth presser plate is moved forward with respect to the sewing machine. In the state facing one side of the sewing machine needle, the operation of holding the corner pin by the holding device and rotating the cloth holding plate 90 ° about the corner pin by the rotating device by 90 ° is alternately repeated to move the cloth. At the same time, the edge of the cloth is overlock-stitched along the cut edge while cutting the peripheral edge of the cloth with the sewing machine, and the edge is overcast.

[0007]

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

As shown in FIGS. 1 and 2, a sewing machine 2 is attached to the rear of the upper surface of the fixed table 1. The sewing machine 2 has a table 3, and a presser foot 5 having a needle hole through which a sewing needle 4 shown in FIG. 4 can be inserted is provided on the table 3. A cutting device 6 shown in FIG. 7A is provided in front of the presser foot 5.

Here, the cutting device 6 moves the movable blade 6a up and down with respect to a fixed blade (not shown), and cuts the cloth with both blades.

The presser foot 5 is moved up and down by a lifting device 7 shown in FIG. The elevating device 7 swings the lever 10 about the pin 9 by the operation of the elevating cylinder 8, and the swinging motion is rotatably supported by the bearing 13 on the back surface of the sewing machine arm 2 a via the interlocking rod 11 and the link 12. The rotation is converted into a rotating motion of the rotating shaft 14, the rotating shaft 14 and the presser foot 5 are connected by an arm 15, and the presser foot 5 is moved up and down by forward and reverse rotation of the rotating shaft 14.

A support table 2 is provided on the fixed table 1.
0 is provided. The support table 20 is supported by two rails 21 provided on the fixed table 1 and is movable toward the sewing machine 2, and is stopped and held at an arbitrary position by the operation of a lock device (not shown).

The support table 20 is a table 3 of the sewing machine 2.
Has a cut-out portion 22 in which the support table 20 can be fitted.
Is held at the same height as the table 3.

On one side of the front portion of the support table 20, there is provided a ruler 23 for positioning the cloth presser plate 30 of the cloth A placed on the support table 20.

As shown in FIG. 5, the cloth pressing plate 30 comprises an upper plate 31 made of synthetic resin and a lower plate 32 made of stainless steel fixed to the lower surface thereof. The lower plate 32 is slightly larger than the upper plate 31.

The four corners of the upper plate 31 and the lower plate 32 are arcs. Pins 33 are provided on the upper surface of the upper plate 31 at the center of curvature of the arc-shaped corner and at a bisecting position between the centers of curvature.

Here, for convenience of explanation, eight pins 33
Are displayed as a pins to h pins to distinguish the pins 33.

The ruler 23 has an interval between the ruler 23 and the upper surface of the support table 20 which is slightly larger than the thickness of the pressure plate 30. On one side edge of the ruler 23, a pin 33,
A semicircular notch 24 for positioning, into which the h-pin 33 and the g-pin 33 can be fitted, is formed, and the notch 24 into which the h-pin 33 can be fitted is larger than the pin diameter.

A slide bar 40 extending in the front-rear direction is provided on one side of the upper surface of the support table 20, and a first movable table 41 is movably supported along the slide bar 40. The first moving table 41 has a support plate 42.
The first moving table 41 is reciprocated along the slide bar 40 by the operation of the first moving device 43.

The first moving device 43 extends a timing belt 45 between a pair of front and rear toothed pulleys 44a and 44b, and a first moving table 41 is attached to a part of the timing belt 45.
Is fixed, and one of the toothed pulleys 44 a is rotated by the drive of the motor 46 to move the first movable table 41.

[0020] Before and after the transport path of the first movable carriage 41, a pair of switches LS ₁ to LS ₄ are respectively provided, when actuating the switch LS ₂ a first moving table 41 moves forward, the motor 46 is slow rotating and actuates the switch LS _1, the motor 46 is adapted to stop.

Further, when the first movable carriage 41 actuates the switch LS ₃ and retraction, the motor 46 rotates at a low speed, when operating the switch LS ₄ motor 46 is adapted to stop.

The first moving table 41 is positioned by a positioning device 47 between a forward stop position and a backward stop position. The positioning device 47 attaches a bracket 48 to one side of the support plate 42 of the first moving table 41, and attaches a positioning pin 50 to a piston shaft 49 a of a positioning cylinder 49 supported by the bracket 48. On the upper surface, a pair of positioning plates 51 are fixed at a forward stop position and a backward stop position of the first moving table 41, and the positioning pins 50 are engaged with pin holes 52 provided in the respective positioning plates 51. I have to.

The beam 5 is provided on the support plate 42 of the first moving table 41.
One end of 3 is fixed. The beam 53 extends long in a direction orthogonal to the moving direction of the first moving table 41, and the cloth feeding device 60 is supported by the beam 53.

The cloth feeding device 60 is provided with a second movable table 62 slidably along a rail 61 fixed to the front surface of the beam 53, and a pair of brackets 64, 64 are mounted on a support plate 63 of the second movable table 62. And an engagement block 66 is fixed to a piston rod of a cylinder 65 attached to each bracket 64, and a pin hole 67 formed on the lower surface of the engagement block 66 is inserted into the d-pin 33 and the h-pin of the pressure plate 30. 3
3 or the b-pin 33 and the f-pin 33 to
2 is moved along the rail 61.

Here, the second moving table 62 is the second moving device 6
8 moved. The second moving device 68 includes the beam 5
3. A pair of toothed pulleys 69 provided above both ends of the third pulley
a, 69b, a timing belt 70 which is stretched between the toothed pulleys 69a, 69b and partially fixed to the second movable table 62, and a motor 71 for rotating one of the toothed pulleys 69a, The second moving table 62 is moved along the rail 61 by driving the motor 71.

Here, the motor 71 is a pulse motor capable of detecting the rotation angle of the rotating shaft, and the motor 71 is supported by a motor support plate 72 fixed to one end of the beam 53. On the other hand, the toothed pulley 69 b is rotatably supported by a pulley support plate 73 fixed to the other end of the beam 53, and rolls along the upper surface of the support table 20 at the lower end of the pulley support plate 73. A roller 74 is rotatably supported.

A first switch S _{1 to a} fifth switch S ₅ for stopping the motor 71 of the cloth feeding device 60 are mounted on the beam 53. The first switch S _{1 to} the fifth switch S ₅ are proximity switches, and a proximity body 75 made of a magnet, a magnetic material, or a non-magnetic material for operating the switch is mounted on a support plate 63 of the second movable base 62. It is supported by a piece 76 (see FIG. 3).

Here, when the proximity body 75 operates the third switch S ₃ , one of the corner pins a, c, e, and g of the cloth presser plate 30 moved by the cloth feeder 60 is moved to the sewing machine needle of the sewing machine 2. mounting position of the third switch S ₃ is regulated so as to stop the one side of four.

The distance between the third switch S ₃ and the second switch S ₂ and the fourth switch S ₄ located on both sides of the third switch S ₃ is made equal to the distance between the pins 33 of the pressure plate 30.

Further, on the side of the ruler 23, the pressure plate 3
0 is positioned, when made to face to the second movable carriage 62 moves the by engaging block 66d pin 33 and h pin 33, and the proximity member 75 and the first switch S ₁ opposite to the above the cloth presser plate 30 to, first mounting position of the switch S ₁ is restricted.

[0031] The mounting position of the fifth switch S ₅ is arbitrary, predetermined interval is provided between the fourth switch S _4.

As shown in FIG. 3, a support piece 76 is attached to the front surface of the support plate 63 of the second moving table 62, and a cloth presser plate is attached to the lower end of the piston rod of the press cylinder 77 supported by the support piece 76. Pad 78 for preventing lifting of 30
Is installed.

The corner pins 33 of the presser foot plate 30 arranged on one side of the sewing needle 4 of the sewing machine 2 are shown in FIGS.
Are held by the holding device 80 shown in FIG.
Is held by the holding device 80, the rotating device 90 rotates the cloth holding plate 30 by 90 ° about the corner pin 33.

The holding device 80 has one end of a cylinder arm 81 fixed to the rear portion of the upper surface of the support table 20, and a holding cylinder 82 attached to the tip of the cylinder arm 81.
A pin hole 84 into which the corner pin 33 can be inserted is formed on the lower surface of the block 83 attached to the piston rod of the holding cylinder 82.

On the other hand, the rotating device 90 is
One end of an engagement cylinder 91 is swingably attached to the rear portion of the upper surface of the engagement cylinder 91 via a pin 92, and a hook engageable with the pin 33 of the pressure plate 30 at the tip of the piston rod of the engagement cylinder 91. The hook 93 is attached to one of the b-pin 33, the d-pin 33, the f-pin 33, and the h-pin 33 by swinging the engagement cylinder 91 by a swing cylinder 94 provided on the support table 20. When the hook rod 93 is engaged with the pin 33 and the piston rod of the engagement cylinder 91 is moved backward, the cloth holding plate 30 is rotated by 90 ° about the corner pin 33. ing.

In order to accurately stop the cloth holding plate 30 at a position rotated by 90 °, a stopper piece 100 capable of contacting the corner pin 33 is mounted on the upper surface of the support table 20.

The sewing apparatus shown in the embodiment has the above-mentioned structure, and its operation will be described below.

Now, the quadrilateral cloth Ao is placed on the support table 20.
Is placed thereon, and the cloth presser plate 30 is placed thereon. As shown in FIG. 6 (a), each of the a pin 33, the h pin 33 and the g pin 33 of the cloth presser plate 30 is When engaging position, the two switches LS ₅ and LS ₆ attached to the upper surface of the ruler 23 is activated.

At this time, the first movable table 41 is set to the switch LS
₄ is operated, only the motor 71 of the cloth feeding device 60 is operated by the operation of the two switches LS ₅ and LS ₆ , and the second moving table 62 is moved to the slide bar 40.
Move toward.

As shown in FIG. 6A, the second moving table 62
Proximity member 75 provided to face the first switch S ₁ when the first switch S ₁ is activated, the motor 71 of the cloth feed device 60 is stopped.

By the stop, the engaging block 66 of the cylinder 65 provided on the second movable base 62 faces the d-pin 33 and the h-pin 33 of the presser plate 30, and the second movable base 62
At the same time, the cylinders 66 are operated to lower the engagement block 66.

The pin hole 67 of the engagement block 66 has the d-pin 3
When the 3 and h pins 33 are fitted, the motor 71 of the cloth feeder 60 operates to move the second movable table 62 in a direction away from the ruler 23.

At this time, the engagement block 66 and the d-pin 33
And the h pin 33 are in the engaged state,
By the movement of 2, the a-pin 33, the h-pin 33 and the g-pin 33 come off from the notch 24.

When the second movable table 62 separates from the ruler 23 by a predetermined distance, the motor 46 of the first movable device 43 operates to activate the first movable device 43.
The moving table 41 is moved forward. At this time, since the second moving table 62 of the cloth feeding device 60 is in a moving state by the operation of the motor 71, the cloth holding plate 30 moves obliquely toward the sewing machine 2.

The proximity member 75 is the Part the third switch S ₃ to face the third switch S ₃ is operated, the motor 71 of the cloth feed device 60 is stopped.

On the other hand, when the first moving base 41 operates the switch LS ₂ provided on the moving path, the motor 46 rotates at a low speed. When the first moving base 41 operates the switch LS ₁ , the motor 46 starts operating. Stop.

As shown in FIG. 7A, the first moving table 41
And b of the presser foot plate 30 due to the stop of the second moving table 62.
The pin 33 faces one side of the sewing needle 4 of the sewing machine 2 and the cloth A
In the position o, the center of one side of the outer periphery is positioned below the sewing machine needle 4.

At this time, the presser foot 5 of the sewing machine 2 is in a state of being lifted from the table 3 by the operation of the lifting device 7.

When the cloth Ao is positioned with respect to the sewing machine 2 as described above, the presser foot 5 descends, and at the same time, the motor 71 of the cloth feeder 60 operates to move the second moving table 62, The cloth Ao is moved forward with respect to the sewing machine 2.

The sewing machine 2 operates simultaneously with the forward feed of the cloth Ao, and the cutting device 6 cuts the peripheral edge of the cloth Ao, and overcuts the cut edge to overhang the edge.

[0051] As shown in FIG. 8, the proximity member 75 provided on the second movable carriage 62 actuates the fourth switch S ₄ to face the fourth switch S _4, the motor 7 of the cloth feed device 60
1 stops, and at the same time, the sewing machine 2 also stops.

At this time, the a-pin 33 of the presser plate 30 faces one side of the sewing machine needle 4, and the block 83 of the holding device 80 is located above the a-pin 33.

Simultaneously with the stop of the motor 71, the holding cylinder 82 of the holding device 80 operates to lower the block 83. As shown in FIG.
When the pin 4 is fitted to the a-pin 33, the cylinder 65 of the cloth feeding device 60 operates to raise the engagement block 66. Further, the presser cylinder 77 is operated to lower the pad 78 to prevent the cloth presser plate 30 from floating.

Further, as shown in FIG.
Actuates the engagement cylinder 91 to move the hook 93 forward. When the hook 93 moves to one side of the h-pin 33 and stops, the swing cylinder 94 operates, and the pin 9 shown in FIG.
The engaging cylinder 91 is swung about the center 2 to engage the hook 93 with the h pin 33. At the same time as the engagement, the engagement cylinder 91 moves the hook 93 backward.

By the retreat of the hook 93, the cloth presser plate 30 rotates around the a-pin 33 as shown in FIG. 11, and the sewing machine 2 operates simultaneously with the rotation. For this reason,
The cloth Ao is cut into an arc shape around the a-pin 33 by the cutting device 6, and the cut edge is overlock-stitched.

When the presser foot plate 30 rotates 90 °, the g pin 33 comes into contact with the stopper piece 100, and at the same time, the swing cylinder 94 operates to swing the engagement cylinder 91 about the pin 92. Then, the engagement between the hook 93 and the h pin 33 is released. After the engagement is released, the engagement cylinder 91 operates to move the hook 93 backward.

When the cloth holding plate 30 is rotated by 90 °, the second movable table 62 is moved backward toward the slide bar 40 by the operation of the motor 71 of the cloth feeder 60 shown in FIG. At this time, when the pad 78 of the presser cylinder 77 moves linearly, the contact position between the cloth presser plate 30 rotating around the a pin 33 and the pad 78 shifts in a direction orthogonal to the moving direction of the second movable table 62. As a result, rotation of the presser foot plate 30 is hindered.

Therefore, the first moving table 41 is moved forward and backward by the forward and reverse rotation of the motor 46 of the first moving device 43 while the second moving table 62 is moved backward along the rail 61, and the pad 78 and the cloth pressing plate 30 are moved. The contact position is kept constant.

[0059] The second moving base 62 is retraction, as shown in FIG. 12, the proximity member 75 and the second faces the second switch S ₂
Operating the switch S _2, a cloth feeding device shown in FIG. 1 6
0 motor 71 stops.

At this time, the cylinder 65 of the second moving table 62
B pin 33 and f pin 3
3 faces.

Simultaneously with the stop of the second moving table 62, the cylinder 65 operates to lower the engagement block 66. When the engagement block 66 engages with the b-pin 33 and the f-pin 33, the holding cylinder 77 is moved. Actuates to raise pad 78.

Further, the holding cylinder 82 of the holding device 80 shown in FIG. 10 operates to raise the block 83 and release the holding of the a-pin 33.

Simultaneously with the release of the holding of the holding device 80, the motor 71 of the cloth feeding device 60 is operated to move the second movable table 62 along the rail 61 and feed the cloth Ao forward with respect to the sewing machine 2.

The sewing machine 2 operates simultaneously with the feeding of the cloth Ao to perform overlock sewing while cutting the periphery of the cloth Ao. When the proximity body 75 moves to a position opposing the fourth switch S ₄ shown in FIG. 12 and operates the fourth switch S ₄ , the motor 71 of the cloth feeding device 60 stops.

The holding device 80 holds the g-pin 33 simultaneously with the stop of the forward movement of the cloth Ao, and the cylinder 65 of the second moving table 62 engages the engagement block 66 with the b-pin 33 and the f-pin 33. Then, the presser cylinder 77 is operated, and the pad 78 presses the cloth presser plate 30. Further, the rotation device 90 is operated to move the cloth holding plate 30 around the
Rotate 0 °.

Thereafter, the above operation is repeated, and the cloth Ao is cut into a quadrilateral as shown in FIG. 14, and the cut edge is overlock-stitched.

The cloth A is fed to a position where the sewing start position (a) of the cloth A is located slightly forward of below the sewing machine needle 4, and
When the proximity member 75 actuates the fourth switch S ₄ to face the fourth switch S _4, the presser foot 5 is raised, also, retraction of the first movable carriage 41 first moving device 43 is actuated And at the same time, the motor 71 of the
The moving table 62 is moved forward.

When the proximity member 75 of the second moving table 62 operates the fifth switch S ₅ , the motor 71 stops. When the first moving table 41 operates the switch LS ₄ , the first moving device 43 is operated. Motor 46 stops, and the sewn cloth A is carried to the position (b) shown in FIG. 1 and stopped.

Simultaneously with the stop of the cloth A, the cylinder 65 of the second moving table 62 operates to raise the engagement block 66, and d
The engagement with the pin 33 and the h-pin 33 is released.

Thereafter, the above-described operation is repeatedly performed, and the fabric product 110 shown in the figure is continuously formed.

In the embodiment, the cloth A positioned on one side of the ruler 23 is automatically fed to the position of the sewing machine 2. However, the cloth A is positioned below the second movable table 62 stopped on one side of the sewing machine 2. The cloth A may be sewn by positioning the cloth A. In this case, the first moving device 43 can be omitted. Further, the first switch S ₁ and the fifth switch S ₁
Switch S ₅ also can be omitted.

[0072]

As described above, in the sewing apparatus according to the present invention, the cloth pressed by the presser foot plate is advanced to the sewing machine, and the corner pin provided on the presser foot plate is used as one of the sewing machine needles. When the cloth is advanced forward to a position facing the side, the cloth presser plate is rotated by 90 ° about the corner pin, and further advanced, and the cloth presser plate is rotated by 90 degrees each time the corner pin faces one side of the sewing machine needle. ° Rotation allows the corners to be rounded, and the entire periphery can be automatically formed with overlock stitching, and efficiently forms uniform, high-quality products. can do.

[Brief description of the drawings]

FIG. 1 is a plan view showing an embodiment of a sewing device according to the present invention.

FIG. 2 is a sectional view taken along the line II-II in FIG.

FIG. 3 is a sectional view taken along the line III-III in FIG. 1;

FIG. 4 is a perspective view showing the presser foot lifting device according to the first embodiment;

FIG. 5 is a perspective view showing the cloth presser plate according to the first embodiment;

FIG. 6A is a plan view showing a state in which a cloth is set on the sewing machine, and FIG. 6B is a cross-sectional view taken along the line VI-VI of FIG.

FIG. 7A is a cross-sectional view showing a sewing start state of the cloth;
(B) is a sectional view taken along the line VII-VII of (a).

FIG. 8 is a plan view showing the sewing process of the cloth.

FIG. 9 is a plan view showing a state before the cloth holding plate is rotated by 90 °.

FIG. 10 is a sectional view taken along line XX of FIG. 9;

FIG. 11 is a plan view showing a state where the presser foot plate is rotating.

FIG. 12 is a plan view showing a state in which the presser foot plate is rotated by 90 °.

FIG. 13 is a plan view showing a state in which the sewn cloth has been transported to a discharge position.

FIG. 14 is a plan view showing a sewing state of the cloth.

[Explanation of symbols]

2 perforations 20 support table 30 cloth presser plate 33 pins 60 cloth feed device 62 second movable carriage S _2, S _3, S ₄ switches 75 close member 80 holding device 90 rotating device

Claims (1)

(57) [Claims] A corner table is provided at a center of curvature of an arc-shaped corner formed at four corners of a support table and a cloth placed on the support table. , A cloth feeder that linearly moves the presser foot by detachably holding pins between corner pins of the presser foot, and a cloth feeder that moves together with the presser foot by the cloth feeder. A sewing machine that performs overlock stitching along the cutting edge while cutting the peripheral edge of the cloth to be cut, and stopping means that stops the cloth feeding device at a position where a corner pin of the cloth holding plate faces one side of the sewing needle. Holding means for rotatably supporting a corner pin facing one side of the sewing machine needle, and rotating means for rotating the cloth holding plate 90 ° in one direction about the corner pin held by the holding means. Made sewing machine.