JP2000288278A - Fabric moving device for automatic sewing machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make surely pinchable an article to be sewn even when an article to be sewn supporting section is tilting by providing a rocking device which rocks an article to be sewn pinching section in approx. the same direction as the opening/closing direction of a contact section, in an automatic sewing machine wherein an article to be sewn is pinched by closing two contact sections which can come into contact with the article to be sewn, and also, are openable/closable. SOLUTION: An article to be sewn pinching section 28 which stands by above an article 12 to be sewn is lowered by a stretch motion of an air cylinder 22 after the sewing is completed, and in this case, if an article to be sewn supporting section 4 is tilting, first, one finger 38 comes into contact with the article 12 to be sewn. As a result, a chuck 42 rocks clockwise on a rocking pivot 46, and the finger 38 moves to the left, and the article 12 to be sewn pinched by the finger 38 and the article to be sewn supporting section 4 moves to the left as well accompanying the movement of the finger 38. The article to be sewn pinching section 28 is further lowered, and when the other finger 40 comes into contact with the article 12 to be sewn, the lowering stops, and by a closing operation of the fingers 38 and 40 continuing the stop, the article 12 to be sewn is pinched.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cloth moving apparatus for an automatic sewing machine, and more particularly to a cloth moving apparatus for an automatic sewing machine which performs sewing based on data programmed in advance.

[0002]

2. Description of the Related Art Conventionally, various cloth moving devices have been used for moving a sewing material in a sewing machine. One example of such a device is shown in FIG. In the figure, the cloth moving device includes a vertical moving means 122 and a sewing holding section 428 which can be moved up and down by the vertical moving means 122. The sewing holding section 428 has fingers 138 and 140 which can be opened and closed. As shown in FIG. 12A, the sewing product holding portion 428 is disposed above the sewing product 112 on the sewing product support portion 104 of the sewing machine. When the sewing product 112 is moved, the fingers 138 and 140 are moved by the vertical movement means 122 as shown in FIG.
12C, the fingers 138 and 140 are closed to close the sewing product 112 as shown in FIG.
Sandwich. The sewing product holding portion 42 holding the sewing product 112
8 is moved up and down by a vertical moving means 122 and moved to a predetermined place by a horizontal moving means (not shown), and then the fingers 138 and 140 are opened to drop the sewing product 112.

[0003]

As described above, the sewing product 11
The sewing product holding portion 428 is moved down to the position 2 and the sewing product 1
In the cloth moving device of the type that clamps the sewing material 12, a situation may occur in which the sewing material 112 cannot be clamped, for example, when the sewing support portion 104 is inclined due to an error in manufacturing or the like.

That is, as shown in FIG. 13A, when the straight line L connecting the tips of the fingers 138 and 140 is not parallel to the upper surface of the sewing product holding portion 428, FIG.
When the sewn product holding portion 428 is lowered as shown in FIG. 13, only one finger 140 comes into contact with the sewn product 112, but the other finger 138 does not come into contact. Therefore, as shown in FIG. Sewing material 1 even when closed
12 cannot be pinched.

[0005] Such a phenomenon occurs not only when the sewn product support portion 104 is inclined, but also when the sewn product holding portion 428 is inclined due to a mounting error of the sewn product holding portion 428 or the like.
This may also occur when unevenness occurs in the sewing support portion 104, when a step occurs in the sewing 112 itself, or the like.

Accordingly, the object of the present invention is to
It is an object of the present invention to provide a cloth moving device that can securely hold the sewn product 112 even when the straight line L connecting the tips of the 8, 140 and the upper surface of the sewn product 112 is not parallel.

[0007]

In order to achieve the above object, according to the present invention, there is provided a sewing machine having two contact portions capable of contacting and opening and closing a sewing product on a sewing product support portion. A sewn product holding portion for holding the sewn product by closing the two abutting members, a vertical movement means for vertically moving the sewable product holding portion, and the sewable product holding portion being substantially the same as the opening and closing direction of the abutment portion And an oscillating device for oscillating in a direction.

For example, the swinging device includes a bracket that is moved up and down by the up-and-down moving means, a swinging fulcrum shaft fixed to the holding portion of the sewing product and rotatably connected to the bracket, An elastic means provided between the sewing product holding portion and the sewing product holding portion to bias the sewing product holding portion to the swing origin position.

[0009]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a perspective view of a sewing machine in which a first embodiment of a cloth moving device for an automatic sewing machine according to the present invention is incorporated.

In FIG. 1, a sewing product support 4 is provided on a sewing machine frame 2, and a sewing machine head 6 and an XYZ axis driving device 8 are arranged on the sewing product support 4. The cloth presser 10 can be moved in the X and Y directions by the XYZ axis driving device 8 while holding the sewing product 12 on the sewing product support 4,
In addition, it is configured to be movable also in the Z direction before and after sewing. This sewing machine is an automatic sewing machine that performs sewing based on data programmed in advance.

Reference numeral 14 denotes a cloth moving device,
6, the rotating arm 18, the air cylinders 20, 22, the bearings 24, 24, the vertical shaft 26, the sewing product holding portion 28, the arm 34 and the like.

The frame 16 is fixed to a side wall of the sewing machine frame 2. A vertical shaft 26 extending in the vertical direction is rotatably connected to the frame 16 via bearings 24, 24, and the rotating arm 18 is fixedly or rotatably connected to the vertical shaft 26. Accordingly, the rotating arm 18 is rotatable in the horizontal direction (AB direction in the figure) so that the frame 1 can rotate.
6 attached.

The air cylinder 20 is connected to the head 3 at the connecting portion 3.
At 0, it is connected to the sewing support 4 and the rod side is connected to the rotating arm 18 at the connection 32. The air cylinder 20 can swing about the connection portion 30 with respect to the sewing product support portion 4 and can rotate about the connection portion 32 with respect to the rotating arm 18. Connected to each other. Air cylinder 20
Is activated and its rod is extended, the rotating arm 18
6, the rotating arm 18 rotates in the direction A when the rod retreats.

An air cylinder (vertical moving means) 22 is fixed to the tip of the rotating arm 18 via an arm 34.
A sewing product holding portion 28 is connected below the air cylinder 22.

FIG. 2 is a front view of the sewn product holding portion 28 of the cloth moving device 14 of FIG. 1, and FIG. 3 is a side view showing a part of the sewn product holding portion 28 in cross section.

In these figures, the air cylinder 22
Is fixed to a U-shaped bracket 36. A chuck 42 having two fingers (contact portions) 38 and 40 that can be opened and closed in the EF direction in the drawing is disposed inside the bracket 36. Although not shown, a drive mechanism that opens and closes the fingers 38 and 40 may use air supplied through an air supply tube, for example. Instead of the air type, a mechanical type or an electric type may be used.

A swing fulcrum plate 44 is fixed to the chuck 42, and a swing fulcrum shaft 46 and a first spring hook 48 are fixed to the swing fulcrum plate 44. The bracket 36 has a second
Is fixed. In this embodiment, a second spring hook 50, a first spring hook 48, and a swing fulcrum shaft 46 are arranged in this order from above.

Further, the pivot 36 is provided on the bracket 36.
6 and a through hole 48a having a diameter larger than that of the first spring hook 48, and the two through holes 46a, 48a are respectively provided with the swing fulcrum shaft 46 and the first spring hook. 48 is inserted. The through-hole 48a is not limited to a circular one as shown in the figure, and may be, for example, a horizontally elongated hole.

One end of a tension spring (elastic means) 52 is connected to the first spring hook 48, and the other end is connected to the second spring hook 50.

Since the sewn product holding portion 28 has such a configuration, the chuck 42 has the swinging fulcrum shaft 46 as a center and a direction substantially the same as the opening and closing direction (EF direction in FIG. 2) of the fingers 38 and 40 (EF direction in FIG. 2). The swing range is determined by the diameter of the through hole 48 a of the bracket 36. Therefore, the size of the through hole 48a is determined so that a necessary swing range can be obtained. It should be noted that the second spring hook 50, the first spring hook 48, and the swing fulcrum shaft 46 are normally aligned in the vertical direction as shown in the drawing. The swing device is a bracket 3
6, a swing fulcrum shaft 46 and an elastic means 52 are provided.

The general operation of the cloth moving device for an automatic sewing machine having the above-described configuration will be described. After the sewing is completed, when the cloth holding device 10 is raised by the XYZ-axis driving device 8, the air cylinder 22 is operated and its rod 22a is extended downward, so that the sewn product holding portion 28 is placed on the sewn product 12. Descend. Activate the chuck 42 to move the two fingers 3
By closing 8, 40, the sewing product 12 is clamped. Thereafter, when the rod 22a of the air cylinder 22 retreats, the sewn product holding portion 28 is raised. Air cylinder 2
0 and the rod is extended so that the rotating arm 18
Pivots in the direction B to move the sewn product holding portion 28 to a predetermined position, and then opens the fingers 38 and 40 to drop the sewn product 12 downward. When the rod of the air cylinder 20 retreats and the rotary arm 18 rotates in the direction A, the sewing holding portion 28 returns to the original position, and waits until the next sewing is completed.

FIG. 4 is a front view for explaining the operation of the cloth moving device according to the present embodiment, and shows the sewing product holding portion 28 when the sewing product support portion 4 is inclined. As described above, the sewn product holding portion 28 that has been waiting above the sewn product 12 is moved to the rod 2 of the air cylinder 22 after the sewing is completed.
When the sewing support 4 is inclined as shown in the figure, the finger 38 first comes into contact with the sewing product 12 on the sewing support 4, and as a result, The chuck 42 starts oscillating around the oscillating fulcrum shaft 46 in the clockwise direction (arrow C direction) in the figure. Due to this swing, one finger 38 moves to the left in FIG. 4, and the sewn material 12 sandwiched between the one finger 38 and the sewn product support portion 4 also moves the one finger 38.
4 moves to the left in FIG. This swinging continues further, and the sewn product holding portion 28 further descends, and when the other finger 40 comes into contact with the sewn product 12 on the sewn product support portion 4, the lowering stops and the swing stops.

As described above, according to the present invention, even when the sewn product support 4 is inclined, the two fingers 38, 4 are provided.
0 can both abut the sewn article 12. Similarly, according to the present invention, in addition to the case where the sewn product supporting portion 4 is inclined, the case where the sewn product holding portion 28 is inclined due to a mounting error of the sewable product holding portion 28 or the like, The two fingers 38 and 40 can both abut the sewn product 12 when the sewn product 12 itself has a step or the like.

After the fingers 38 and 40 abut on the sewing product 12, the fingers 38 and 40 are closed, and the sewing product 12 can be sandwiched between the fingers 38 and 40. When the sewing product holding portion 28 holding the sewing product 12 is lifted up by the air cylinder 22 and separated from the sewing product support portion 4, the chuck 42 is turned around the swing fulcrum shaft 46 by the action of the tension spring 52, and the reverse of the above. (Counterclockwise direction: arrow D direction) to return to the original position (oscillation origin position) shown in FIG.

FIGS. 5 and 6 show a cloth holding device 12 of a second embodiment of the cloth moving device for an automatic sewing machine according to the present invention.
8 is shown, FIG. 5 is a front view thereof, and FIG. 6 is a side view showing a part thereof in cross section. The sewing product holding portion 128 according to this embodiment is different from the sewing product holding portion 28 according to the first embodiment in that the swing support shaft 46 which is the center of the swing of the chuck 42 according to the first embodiment, This means that the vertical positional relationship with the second spring hook 50 has been reversed, and the arrangement of the swing fulcrum plate 44 and the tension spring 52 has changed accordingly. More specifically, in the first embodiment, the second spring hook 50, the first spring hook 48, and the swing fulcrum shaft 46 are arranged in order from the top, but in the second embodiment, In the embodiment, the swing fulcrum shaft 46, the first spring hook 48, and the second spring hook 50 are arranged in this order from the top.
Is arranged. For other components,
The operation is the same as the example in FIG. 3 and the operation described based on FIG.

FIGS. 7 and 8 show a cloth moving device 22 for an automatic sewing machine according to a third embodiment of the present invention.
8 is shown, FIG. 7 is a front view thereof, and FIG. 8 is a side view showing a part thereof in cross section. The difference between the sewn product holding portion 228 according to the present embodiment and the sewable product holding portion 28 according to the first embodiment is that the tension spring 52 according to the first embodiment is different.
Accordingly, a compression spring body 250 containing a compression spring (not shown) is fixed to the bracket 36 in place of the second spring hook 50 of the embodiment of FIG. From the upper end of the compression spring main body 250, a rod 252 that is constantly urged upward and moves up and down in the vertical direction protrudes. At the upper end of the rod 252, a contact member 253 that comes into contact with the spring pad 48 is provided. I have.
Other components are the same as those in the examples of FIGS. 1 to 3, and the operations described with reference to FIG. Since the spring pad 48 has the same structure as the first spring hook 48 of the first embodiment, the same reference numeral is given.

FIGS. 9 and 10 show a cloth holding device 3 according to a fourth embodiment of the cloth moving device for an automatic sewing machine according to the present invention.
9 is a front view thereof, and FIG. 10 is a side view showing a part thereof in cross section. The sewing product holding portion 328 according to this embodiment is different from the sewing product holding portion 2 according to the first embodiment.
8 is that a leaf spring 352 is used in place of the tension spring 52 according to the first embodiment, and accordingly, the bracket 36 is attached to the second spring of the embodiment of FIG.
A spring support portion 350 is fixed in place of the spring hook 50 of FIG. The leaf springs 352 are arranged in a vertical direction, and a pair of the leaf springs 352 is fixed to the spring support portion 350 at the upper end, and the lower end is arranged so as to sandwich the spring pad 48 by the two leaf springs 352. . Other components are the same as those in the examples of FIGS. 1 to 3, and the operations described with reference to FIG.
Since the spring pad 48 has the same structure as the first spring hook 48 of the first embodiment, the same reference numeral is given.

FIG. 11 is a view showing a sewing material holding portion 328 of a fifth embodiment of the cloth moving device of the automatic sewing machine according to the present invention. The dough moving device according to this embodiment has a first
This is an example in which two sewn article holding portions 28 according to the embodiment are used. Specifically, the two holding portions 28, 28 are arranged side by side in the opening / closing direction (EF direction in the figure) of the fingers 38, 40, which is the same, and orthogonal to the opening / closing direction of the fingers 38, 40. The number of the sewn product holding portions 28 is not limited to two and may be two or more.

The cloth moving apparatus for an automatic sewing machine according to the present invention has been described based on the embodiments shown in the drawings. However, the present invention is not limited to these embodiments, and the present invention is not limited thereto. Various modifications are possible within the range. For example, in the present embodiment, the fingers 38, 40 of the sewn product holding portion 28 are configured to make an arc movement, but the fingers 38, 40 are arranged in parallel to face each other so that the contact and separation are performed by parallel movement. It may be. In this case, since the fingers 38 and 40 perform the holding operation, the sewing holding portion 28 does not lift, so that it is not necessary to consider the force for contracting the rod 22 a with respect to the cylinder 22.

[0030]

According to the present invention, the sewing machine has two contact portions which can be brought into contact with the sewing material on the sewing material support portion of the sewing machine and which can be opened and closed by closing the two contact members. A sewing product holding portion for holding the sewing product, up-and-down movement means for moving the sewing product holding portion up and down, and a swing device for swinging the sewing product holding portion in substantially the same direction as the opening / closing direction of the contact portion. Even when the straight line connecting the tips of the pieces is not parallel to the upper surface of the sewing product holding portion, the sewing product can be reliably held.

[Brief description of the drawings]

FIG. 1 is a perspective view of a sewing machine in which a first embodiment of a cloth moving device according to the present invention is incorporated.

FIG. 2 is a front view of a sewn product holding section of the cloth moving device of FIG. 1;

FIG. 3 is a side view showing a cross section of a part of a sewn product holding portion of the cloth moving device of FIG. 1;

FIG. 4 is a front view for explaining the operation of the dough moving device according to the present embodiment.

FIG. 5 is a front view of a sewn product holding portion of a fabric moving device according to a second embodiment of the present invention.

FIG. 6 is a side view showing a part of the sewn product holding portion of FIG. 5 in cross section.

FIG. 7 is a front view of a sewn product holding portion of a fabric moving device according to a third embodiment of the present invention.

8 is a side view showing a part of the sewn product holding portion of FIG. 7 in a cross section.

FIG. 9 is a front view of a sewn product holding portion of a fabric moving device according to a fourth embodiment of the present invention.

FIG. 10 is a side view showing a part of the sewn product holding portion of FIG. 9 in a cross section.

FIG. 11 is a diagram showing a sewn product holding portion of a fabric moving device according to a fifth embodiment of the present invention.

12A and 12B are simplified views showing a holding portion of a sewn product of a fabric moving device according to a conventional example, wherein FIG. 12A shows a state of waiting above the sewn product, and FIG. (C) shows a state in which the two fingers are closed to clamp the sewing product.

FIG. 13 is a simplified diagram for explaining that a situation in which a sewn product cannot be held may occur when a straight line connecting the tips of the fingers of the sewn product holding unit in FIG. 12 is not parallel to the upper surface of the sewn product holding unit; (A) shows a state of waiting above the sewing product, (B) shows a state in which one finger is in contact with the sewing product, and (C) shows a state where the sewing product is held even when two fingers are closed. Indicates a state that cannot be performed.

[Explanation of symbols]

 EF Opening / closing direction of two fingers (contact part) 2 Sewing machine frame 4 Sewing material support part 6 Sewing machine head 8 XYZ axis drive device 10 Fabric holding device 12 Sewing product 14 Fabric moving device 16 Frame 18 Rotating arm 20 Air cylinder 22 Air Cylinder (vertical movement means) 22a Rod 24 Bearing 26 Vertical axis 28 Sewing material holding part 30 Connection part 32 Connection part 34 Arm 36 Bracket 38, 40 Finger (contact part) 42 Chuck 44 Oscillating fulcrum plate 46 Oscillating fulcrum axis 46a , 48a through hole 48 first spring hook 50 second spring hook 52 tension spring (elastic means) 104 sewing product support portion 112 sewing product 122 up and down moving means 128 sewing product holding portion 138, 140 finger 228 sewing product holding portion 250 Compression spring body (elastic means) 252 Rod 253 Contact member 328 Sewn product holding portion 350 Spring support portion 352 Leaf spring (elastic means) 428 Sewn product holding portion

Claims (2)

[Claims] 1. A sewing product clamping device which has two contact portions which can contact and open and close a sewing product on a sewing product support portion of a sewing machine, and which clamps the sewing product by closing the two contact members. A vertical movement means for vertically moving the sewing product holding portion; and a swing device for swinging the sewing product holding portion in a direction substantially the same as the opening and closing direction of the contact portion. Automatic sewing machine cloth moving device. 2. The cloth moving device for an automatic sewing machine according to claim 1, wherein the swinging device comprises: a bracket which is vertically moved by the vertically moving means; A swing fulcrum shaft that is connected as possible, and is provided between the bracket and the sewing product holding portion;
And a resilient means for urging the sewing product holding portion to the swing origin position.