JP2000355868A - Transfer mechanism for sewn product in sewing machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a transfer mechanism for a sewn product in a sewing machine which enables the transfer of the sewn product to accurately be carried out without increasing the overall weight of the sewing machine. SOLUTION: A first movable body 10 mounted on a sewing machine table 1 is coupled with a Y-direction guide member 6 in a relatively movable state and is guided so as to be able to move in the Y-direction alone on the table 1. The movable body 10 is linked to two first driving mechanisms 7 fixed on the underside of the table 1 so as to be driven to move in the Y-direction. A second movable body 11 is supported by the movable body 10 in a movable state in the X-direction in such a way that a rear side bar 11a and a front side bar 11b both extending in the X-direction are coupled respectively with a rear side bar 10a and a front side bar 10b both extending in the X-direction of the movable body 10 in a relatively movable state. The second movable body 11 is linked to two second driving mechanisms 12 fixed on the movable body 10 so as to be driven to move in the X-direction.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for holding an object to be sewn and transferring it on a sewing machine table in order to perform sewing such as embroidery.

[0002]

2. Description of the Related Art For example, in a multi-head sewing machine having a large number of sewing heads arranged side by side, an X-direction driving mechanism and a Y-direction drive mechanism are provided below a sewing machine table as a transfer device for transferring a work to be sewn on the sewing machine table. A drive mechanism is provided, and a rectangular frame for holding the work to be sewn is placed on the sewing machine table. The frame is moved in both the X and Y directions by the X-direction drive mechanism and the Y-direction drive mechanism. A device that is driven to move is known.

Since the frame for holding the work to be sewn is driven to move in both the X and Y directions as described above, the frame is firmly guided in the X and Y directions on the sewing machine table. The guide cannot be guided, and therefore, if the frame itself does not have considerable rigidity, distortion tends to occur when the frame is driven to move. If the frame body is distorted, the entire sewing object held cannot be transferred accurately, and the sewing pattern may be distorted depending on the location of the sewing machine head.

[0004]

The above problem can be solved by increasing the rigidity of the frame itself as described above, but in this case, the weight of the frame itself is inevitably increased. If the weight of the frame body is large, the X-direction drive mechanism and the Y-direction drive mechanism must be correspondingly high in rigidity and high in output power, which not only increases the total weight of the sewing machine but also increases the consumption. This causes a problem that the electric power also increases. Further, it is not suitable for high-speed operation, and there is a limit to improvement in sewing efficiency.

[0005]

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned drawbacks inherent in the prior art, and has been proposed to solve the problem suitably. An object of the present invention is to provide a sewing machine transfer device for a sewing machine that can transfer a product accurately.

[0006]

SUMMARY OF THE INVENTION In order to overcome the above problems and achieve the intended object, the present invention provides an X
An apparatus for transferring a sewing object in a Y orthogonal coordinate plane, wherein the first moving body is guided by a Y-direction guide member on the sewing machine table and driven to move only in the Y direction;
A second moving body guided in the X direction and driven to move in the X direction with respect to the first moving body; a first driving mechanism for driving the first moving body to reciprocate in the Y direction; X body
A second drive mechanism for driving the sewing machine to reciprocate in the direction, and configured to hold the sewing object with respect to the second moving body.

[0007]

According to the sewing machine transfer device of the present invention, the first moving body is guided by the Y-direction guide member on the sewing machine table, and the second moving body is moved X with respect to the first moving body.
Since the first moving body and the second moving body are guided in the directions, the first moving body and the second moving body are less likely to be distorted at the time of moving driving even if they are not so rigid. Therefore, the second moving body is accurately transferred in the X and Y directions without distortion.

[0008]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of a sewing machine according to the present invention. In the embodiment, a description will be given of a form in which the workpiece transfer device according to the present invention is applied to a multi-head embroidery sewing machine. The “X direction (Y direction)”
The direction may be set in any of the front-back direction and the left-right direction of the sewing machine table, but in the embodiment, the direction is set in the left-right direction.

[0009]

First Embodiment FIGS. 1 to 3 show a multi-head embroidery sewing machine which employs a workpiece transfer device according to a first embodiment. The four-headed multi-head embroidery sewing machine shown in FIG. A total of four sewing heads 3 are arranged side by side in the left-right direction (X direction) at predetermined intervals on the front surface of a frame 2 horizontally arranged above the sewing machine table 1. A hook base (not shown) supporting the hook is installed correspondingly on the lower surface of the sewing machine table 1. The upper surface of each pot base is covered with a needle plate 5 mounted on the sewing machine table 1.

On the sewing machine table 1, a first moving body 10 constituted by a rectangular frame is mounted.
The moving body 10 is connected at its left and right sides to Y-direction guide members 6, 6 fixed on the upper surfaces on the left and right sides of the sewing machine table 1 so as to extend along the Y direction, respectively, so as to be relatively movable. Thus, it is configured to be guided on the sewing machine table 1 so as to be movable only in the Y direction. And the first moving body 10
Are connected to two first drive mechanisms 7 arranged on the lower surface of the sewing machine table 1 and separated in the X direction, and are moved and driven in the Y direction by the first drive mechanisms 7, 7. I have. These first drive mechanisms 7 have a well-known configuration. For example, a toothed belt is stretched between two toothed pulleys arranged at a predetermined interval in the Y direction, and the first drive mechanism 7 is provided on a straight running portion of the toothed belt. It is configured by fixing the connecting member. The two first drive mechanisms 7, 7 are connected by a common drive shaft to the toothed pulleys on the drive side, and the first drive mechanisms 7, 7 are integrated by rotating this drive shaft with one motor. Is driven. In addition, individual motors are respectively connected to the drive shafts of the toothed pulleys on the drive side of each first drive mechanism 7, and the first drive mechanisms 7, 7 are integrally driven by synchronously driving the motors. You may do so.

As shown in FIG. 1, the upper part of each first drive mechanism 7 is covered by a cover 8 attached to the upper surface of the sewing machine table 1. Each cover 8 is formed with a slit 8a extending at a predetermined length in the Y direction, and the upper end of the connecting member fixed to each toothed belt is formed by the slit 8a.
The first moving body 10 is connected to the upper end of each connecting member, facing the upper surface of the sewing machine table 1 through a. That is, the first moving body 10 is moved and driven only in the Y direction by the driving of the first driving mechanisms 7 and 7.

The first moving body 10 includes a second moving body 11
Is supported. The second moving body 11 has a rectangular frame shape, and a rear piece 11a and a front piece 11b extending in the X direction have rear pieces 10a extending in the X direction of the first moving body 10, respectively. The first moving body 10 is supported so as to be movable in the X direction relative to the front piece 10b so as to be movable relative to the front piece 10b. In addition, the second movable body 11 holds the material to be sewn, and may hold the cloth occupying a large area such as the raw cloth in an expanded state (used as a so-called raw frame). Each embroidery frame corresponding to each sewing head 3 (for individually holding individual embroidery objects occupying the area within the embroidery range of each sewing head)
Is sometimes held.

The second moving body 11 is provided on the first moving body 10 and is provided with two second driving mechanisms 12 separated from each other in the Y direction.
, And are driven to move in the X direction by the second driving mechanisms 12 and 12. Similarly to the first drive mechanism 7, these second drive mechanisms 12 also extend a toothed belt 19 (see FIG. 2) between two toothed pulleys arranged at a predetermined interval in the X direction. A connecting member is attached to the straight running portion of the toothed belt 19. As shown in FIG. 1, each of the second drive mechanisms 12 is fixed to the upper surface of the right side of the rear piece 10a and the front piece 10b of the first moving body 10, respectively. The second moving body 11 is connected to the connecting member via the connecting member 15.

As shown in FIG. 2, a spline shaft 18 is inserted between the toothed pulleys on the driving side of the second driving mechanisms 12, 12. This spline shaft 18
The diameter-reduced shaft portions 20 formed at both ends are supported by the bases 13 of the respective second drive mechanisms 12, and the drive-side toothed pulleys 16 are fixed to the respective reduced-diameter shaft portions 20. I have.

The spline shaft 18 is configured to be rotated in the forward and reverse directions by transmitting a rotational force to a spline outer cylinder 18a fitted to the spline shaft 18. That is, the spline outer cylinder 18a is connected to the support table 25 of the sewing machine table 1
Is rotatably supported via a bearing 26 at a portion protruding upward through a through-hole 1a (see FIG. 1) formed at the center. An output shaft 27a of a motor 27 fixed to a stationary portion of the sewing machine is rotatably supported below the support member 25. Spline outer cylinder 18a and motor 2
7, toothed pulleys 28 and 29 are fixed to the output shaft 27a, respectively, and a toothed belt 30 is stretched between them. With this configuration, when the motor 27 is driven to rotate the toothed pulley 28 in the forward and reverse directions, the spline shaft 18 is driven to rotate in the forward and reverse directions via the spline outer cylinder 18a fitted thereto. The two second driving mechanisms 12 are driven to move the second moving body 11 in the X direction. When the first moving body 10 is driven to move in the Y direction by the driving of the first driving mechanisms 7, 7, the second moving body 11 is also driven to move in the Y direction. That is, the sewing object held by the second moving body 11 can be transferred on the XY orthogonal coordinate plane on the sewing machine table 1. Note that the spline shaft 18 supported by the second moving body 11 can freely move in the axial direction relative to the spline outer cylinder 18a externally fitted to the spline shaft 18, so that there is no hindrance to the movement in the Y direction. Nor.

According to the apparatus for transporting sewn material according to the first embodiment, the first moving body 10 moved by the first drive mechanisms 7, 7 is fixed to the sewing machine table 1 on both the left and right sides. The guide member 6 moves while being guided by the Y-direction guide members 6, 6, and therefore moves without distortion by merely reinforcing it with a lightweight reinforcing member 9 that is not so rigid.
That is, the first moving body 10 can be coped with only by reinforcing the extremely lightweight reinforcing member 9 in the front-rear direction, thereby achieving weight reduction. In addition, the second moving body 11 moves in the X direction while being guided by the first moving body 10 that hardly generates distortion. Therefore, the second movable body 11 which is a member for holding the sewing object is accurately moved and driven in an extremely stable state without deformation. Therefore, there is no occurrence of so-called pattern misalignment in which the embroidery pattern for the workpiece held by the sewing machine differs depending on the position of the sewing head 3.

[0017]

Second Embodiment FIGS. 4 to 6 show a workpiece transfer apparatus according to a second embodiment employed in a multi-head embroidery sewing machine. The second embodiment is different from the first embodiment. Second drive mechanism 1
Since only the configuration of the power transmission unit to the power transmission units 2 and 12 is different, the same or equivalent components are denoted by the same reference numerals and the description thereof is omitted.

In the first embodiment, the spline shaft for transmitting power to the second drive mechanism 12 is supported between the two second drive mechanisms 12, 12. In the second embodiment, the spline shaft is longer. A spline shaft 35 having a length (approximately twice the effective embroidery range in the Y direction) is used, and both ends of the spline shaft 35 are supported by bearings 31 fixed on the sewing machine table 1.
The spline shaft 35 penetrates the right ends of the second drive mechanisms 12 and 12, and the two spline outer cylinders 35a and 35a fitted to the spline shaft 35
It is rotatably supported by the drive mechanism 12. A drive-side toothed pulley 32 is fitted to each spline outer cylinder 35a, and a toothed belt 33 is stretched between the drive-side toothed pulley 32 and the driven-side toothed pulley. The spline shaft 35
As shown in FIG. 4, an output shaft of a motor 36 attached by a bracket fixed to the sewing machine table 1 is connected to one end of the motor 36.

In the above-described second embodiment, the driving force is transmitted to the two second driving mechanisms 12, 12 by the spline shaft 35 which is supported so as not to move in the axial direction. Since the toothed pulley 32 on the drive side of No. 12 is connected to the spline shaft 35 via the spline outer cylinder 35a, the movement of the first moving body 10 in the Y direction is allowed. Other functions and effects are the same as those of the first embodiment.

[0020]

FIG. 7 shows a third embodiment employed in a multi-head embroidery sewing machine.
FIG. 6 shows a device for transferring a sewn object according to an embodiment, and the basic configuration is the same as that of the first embodiment described above. Therefore, only different portions will be described, and other configurations that are the same or equivalent will be described. Are denoted by the same reference numerals.

In the third embodiment, the second driving mechanism 1
2 is a linear motor. That is, the stator 37 of the linear motor is fixed on the first moving body 10 so that its longitudinal direction is parallel to the X direction, and the connecting member 15 connected to the moving body of the linear motor is connected to the second moving body 11. Connected to. The third embodiment in which the second drive mechanism 12 is constituted by a linear motor as described above has an advantage that the structure is simpler than the first or second embodiment.

[0022]

Other Embodiments (1) In each of the above embodiments, the first drive mechanism 7 may be constituted by a linear motor. (2) In each of the above embodiments, the first drive mechanism 7 and the second drive mechanism 12 may be configured by a rack and pinion. (3) In each of the above embodiments, the first moving body 10 and the second moving body 11 are moved and driven by the two first driving mechanisms 7 and the second driving mechanisms 12. Alternatively, the number of the second drive mechanisms 12 may be one or three or more. (4) The first moving body is not limited to the frame, but may be a flat plate.
In this case, it is necessary to form a long slit extending in the Y direction at a portion corresponding to the needle hole of each needle plate 5 on the sewing machine table 1.

[0023]

As described above, according to the sewing machine transfer apparatus for a sewing machine according to the present invention, the second moving body is accurately transferred in the X direction and the Y direction without being distorted. The sewn material is transported without distortion at various places.
Therefore, accurate sewing can be performed on the workpiece. Also, there is no need to increase the rigidity of each moving object,
The weight can be reduced, and the sewing efficiency can be improved in response to high-speed operation. Further, there is an advantage that the driving mechanism of the moving body can be reduced in weight, the total weight of the sewing machine can be reduced, and the power consumption can be reduced.

[Brief description of the drawings]

FIG. 1 is a plan view of a multi-head embroidery sewing machine that employs a device for transferring a workpiece according to a first embodiment of the present invention.

FIG. 2 is a sectional view taken along line AA of FIG.

FIG. 3 is a sectional view taken along line BB of FIG. 2;

FIG. 4 is a plan view of a multi-head embroidery sewing machine employing a device for transferring a workpiece according to a second embodiment of the present invention.

FIG. 5 is a sectional view taken along line CC of FIG. 4;

FIG. 6 is a sectional view taken along line DD of FIG. 5;

FIG. 7 is a plan view of a multi-head embroidery sewing machine employing a device for transferring a work to be sewn according to a third embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Sewing machine table 6 Y direction guide member 7 1st drive mechanism 10 1st movable body 11 2nd movable body 12 2nd drive mechanism

Claims (1)

[Claims] 1. An apparatus for transferring a sewing object in an XY orthogonal coordinate plane on a sewing machine table, wherein the apparatus is guided by a Y-direction guide member on the sewing machine table and is moved and driven only in the Y direction. A first moving body, a second moving body guided in the X direction and driven to move in the X direction with respect to the first moving body, and a first drive for driving the first moving body to reciprocate in the Y direction. A second drive mechanism for reciprocatingly driving the second moving body in the X direction, wherein the sewing machine is configured to hold the sewing object with respect to the second moving body. Sewing material transfer device.