EP3101166B1

EP3101166B1 - Workpiece-moving device and sewing machine using same

Info

Publication number: EP3101166B1
Application number: EP14879610.5A
Authority: EP
Inventors: Kazunori Furukawa
Original assignee: Mitsubishi Electric Corp
Current assignee: Mitsubishi Electric Corp
Priority date: 2014-01-27
Filing date: 2014-01-27
Publication date: 2018-12-19
Anticipated expiration: 2034-01-27
Also published as: CN105980620B; JP5648771B1; BR112016016954B8; JPWO2015111099A1; EP3101166A1; EP3101166A4; WO2015111099A1; CN105980620A; BR112016016954B1; BR112016016954A2

Description

Technical Field

The present invention relates to a sewing machine including a conveyance device and a workpiece-moving device and the present invention especially relates to a sewing machine provided with a structure which translates a workpiece to an arbitrary position on a plane and rotates the workpiece.

Background Art

A pattern sewing machine is now being widely used in which a conveyance device moves a sewn material with respect to a sewing needle so as to be able to sew automatically a sewing pattern whose sewing direction varies; and there exist many kinds of sewing machines which vary, according to usages, in extent to be able to sew or in means to form a seam.
In a workpiece conveyance method used by a conventional conveyance device, there formed are a θPS region for perfect stitch and a θHS region for hitch stitch, as shown in Fig. 11. As shown in Fig. 12 (A), in the θPS region, fastening is performed in a balanced and symmetrical state, to produce uniform and high quality stitches. However, as shown in Fig. 12 (B), in the θHS region, unbalanced stitches are produced, remarkably damaging the appearance of patterns. Thus a problem of deterioration in quality arises. In order to solve such problems, a conventional technique has been proposed in which the workpiece is rotated and a relative sewing direction seen from the workpiece is varied so that a sewing direction seen from a sewing needle is kept constant (for example, Patent Document 1). Patent Documents 2, 3 and 4 also discusses relevant prior art.

Prior Art Document

[Patent Document 1] Japanese Patent Laid-Open Publication No. H10-33859
[Patent Document 21 Japanese Patent Laid-Open Publication No. H06-105979
[Patent Document 31 Japanese Patent Laid-Open Publication No. 59-181185
[Patent Document 41 Japanese Patent Laid-Open Publication No. 06-142359

Summary of the Invention

Problem to be Solved by the Invention

In the above patent document 1, a rotation motor of a rotation device to rotate the workpiece is provided so as to be integrated with a conveyance device; therefore, when the conveyance device is shifted, it is also necessary to translate the rotation motor. The rotation motor's weight is born by a drive unit of the conveyance device, giving heavier load thereto. This makes it impossible to quickly shift, lowering the conveyance capability.
The present invention is made to solve the problem. The purpose of the present invention is that the conveyance device and the workpiece-moving device are individually operated to efficiently perform sewing involving rotation, thereby significantly reducing both of drive units' loads.
A workpiece-moving device according to the present invention that translates and rotates a workpiece during operation of a sewing machine, includes: a frame to be translated by a conveyance motor; a loading table on which the workpiece is put, the loading table being disposed rotatably to the frame and translated together with the frame; a drive unit that is installed so as to keep unchanged the drive unit's relative position to the sewing machine even when the frame and the loading table are translated by the conveyance motor's driving; and a transmission means that includes: a first rail that is connected to at least one portion of the loading table; a second rail that is arranged skew to the first rail; a linking component that slidably links the first rail to the second rail; a first pulley; and a holding component that links the second rail to the first pulley, to transmit driving force of the drive unit to the loading table to rotate the loading table. Furthermore, another workpiece-moving device according to the present invention that translates and rotates a workpiece during operation of a sewing machine, includes: a frame to be translated by a conveyance motor; a loading table on which the workpiece is put, the loading table being disposed rotatably to the frame and translated together with the frame; a drive unit that is installed so as to keep unchanged the drive unit's relative position to the sewing machine even when the frame and the loading table are translated
by the conveyance motor's driving; and a transmission means that includes: a first rail that is connected to at least one portion of the loading table; a second rail that is arranged skew to the first rail; a linking component that slidably links the first rail to the second rail; a first gear; and a holding component that links the second rail to the first gear, to transmit driving force of the drive unit to the loading table to rotate the loading table.
Another workpiece-moving device not forming part of the present invention is a workpiece-moving that translates and rotates a workpiece during operation of a sewing machine, and includes: a frame to be translated by a conveyance motor; a loading table on which the workpiece is put, the loading table being disposed rotatably to the frame and translated together with the frame; and a regulation means that includes a first rail that is connected to at least one portion of the loading table; a second rail that is arranged skew to the first rail; a linking component that slidably links both of the first rail and the second rail; a holding component that is placed on the second rail; and a brake device to regulate rotation of the holding component, to regulate part of movement of the loading table translated with the frame, into movement in a direction different from a direction in which the whole loading table is translated.

Effect of the Invention

According to the present invention, a workpiece of a sewing machine can be rotated when conveyed, and the weight of a motor for rotating the workpiece can cause less influence in conveying and controlling.

Brief Description of the Drawings

Fig. 1 is a perspective view showing a state of a sewing machine M1 to which a workpiece-moving device of the present invention is installed;
Fig. 2 is a perspective view showing a state of the sewing machine M1 to which the workpiece-moving device of the present invention is not installed;
Fig. 3 is a perspective view showing the workpiece-moving device of Embodiment 1 of the present invention;
Fig. 4 is a perspective view showing a transmission means and a drive unit of Embodiment 1 of the present invention;
Fig. 5 is a cross-sectional view of the workpiece-moving device, taken along B-B line in Fig.3;
Fig. 6 is an exploded perspective view showing the workpiece-moving device of the present invention;
Fig. 7 is a view for explaining a method to attach and remove a workpiece on a loading table;
Figs. 8 are top face views schematically showing rotation of the workpiece-moving device;
Figs. 9 are views showing a process to sew a circular arc pattern;
Fig. 10 is a perspective view showing a workpiece-moving device of Embodiment 2 not forming part of the present invention;
Fig. 11 is an explanation diagram indicating a perfect stitch region and a hitch stitch region based on a conventional technique; and
Figs. 12 are schematic views of perfect stitches (A) and hitch stitches (B) by the conventional technique.

Modes for Carrying Out the Invention

Embodiment 1

An embodiment of the present invention will be explained below, using figures.
Fig. 1 is a perspective view showing a state of a sewing machine to which a workpiece-moving device of the present invention is installed. In the figure, the sewing machine M1 includes an upper structure and a lower structure; the upper structure is a sewing machine arm M1a for sewing a workpiece, and the lower structure is a sewing machine bed M1b for fixing the workpiece. The workpiece-moving device 10 is a device for translating and rotating the workpiece during the sewing machine's operation. In addition, the workpiece-moving device 10 is installed between the sewing machine arm M1a and the sewing machine bed M1b.
Fig. 2 is a perspective view showing a state of the sewing machine M1 to which the workpiece-moving device 10 is not installed. The sewing machine M1 shown in the figure does not rotate the workpiece, and only carries the workpiece in x and y directions; in the sewing machine, a conveyance device 102 having a conveyance motor carries a clamp device 101 holding the workpiece in x direction and y direction of coordinates shown in the figure, to move the workpiece relative to a sewing needle 103, thereby enabling to automatically sew an intended pattern.
The sewing machine arm M1a includes a sewing needle 103, a needle bar 104 which holds the sewing needle 103 and raises and lowers the sewing needle in z direction, a presser device 105 which prevents cloth from being lifted when a thread is pulled up during sewing, and a needle thread take-up lever 106 which pulls up a needle thread passing through the sewing needle 103.
The sewing machine bed M1b includes the clamp device 101 which holds the workpiece, the conveyance device 102 which carries the workpiece to any position in x direction and/or y direction, a slide plate 107 being a plane on which the workpiece is processed, and a hook 108 which entangles a needle thread passing through the sewing needle 103 with a bobbin thread.
As described above, the clamp device 101 in Fig. 2 can be replaced with the workpiece-moving device 10 in Fig. 1.
Fig. 3 is a perspective view showing a detailed structure of the workpiece-moving device 10 of Embodiment 1 of the present invention. In the figure, the workpiece-moving device 10 includes a frame 31 which is translated by the conveyance motor of the conveyance device 102 provided in the sewing machine M1, and a loading table 32 which is disposed to be rotatable with respect to the frame 31 and is translated with the frame 31, and on which the workpiece is placed.
The workpiece-moving device further includes a drive unit 40 which is a separate component installed thereto so that the relative position to the sewing machine is kept unchanged even when the frame 31 and the loading table 32 are translated by driving of the conveyance motor of the conveyance device 102. Moreover, the workpiece-moving device includes a transmission means 20A which transmits driving force of the drive unit 40 to the loading table 32 to rotate the loading table 32.
The transmission means 20A includes a first rail 22a which is connected to at least one part of the loading table 32, a second rail 22b which is arranged perpendicular or skew to the first rail 22a, and a linking component 22c which slidably links the second rail 22b to the first rail 22a.
The transmission means further includes a first pulley 24, and an arm-shaped plate (holding component) 21 which links the second rail 22b to the first pulley 24.
Moreover, at least one of the linking component 22c and the arm-shaped plate 21 is slidably linked to the second rail 22b, and the transmission mean is provided with a belt that is wrapped around the first pulley 24 to rotate the first pulley 24.
The first pulley 24 is fixed onto the arm-shaped plate 21. On the other hand, the first rail 22a is fixed to the loading table 32, or may be formed so as to be integrated with the loading table 32.
When the frame 31 is installed to the sewing machine, the clamp device 101 in Fig.2 is removed, and then a portion A of the frame 31 shown in Fig. 3 is fixed with screws to the conveyance device 102, to thereby complete the installation.
The drive unit 40 of the workpiece-moving device 10 includes a drive motor 41 and a second pulley 42 which is linked or directly connected to a rotation shaft of the drive motor 41 and around which the belt is wrapped to transmit driving force. The second pulley 42 is linked to the first pulley 24 through the belt 25 of the transmission means 20A, to transmit power of the drive motor 41 to the first pulley 24.
Although the first pulley 24 of the above described transmission means 20A and the second pulley 42 of the drive unit 40 are configured to be driven through the belt 25, chains may be used instead of the belt 25 for the driving, or gears may be used to transmit power. Here, the drive motor 41 is a stepping motor. In addition, a motor cable used for the drive unit 40 passes from a side face of the sewing machine arm M1a through the sewing machine bed M1b, to be finally connected to a control panel not shown in the figure.
In rotation of the workpiece-moving device 10, the drive motor of the drive unit 40 drives an arm-shaped plate 21, and the arm-shaped plate 21 transmits driving force to the loading table 32 through the first rail 22a, the second rail 22b, and the linking component 22c, to rotate the loading table 32.
The drive unit 40 is placed in separation from the frame 31 and the loading table 32; therefore, when the conveyance motor of the conveyance device 102 translates the workpiece, the weight of the drive unit 40 is not borne by the conveyance motor, which thereby enables a high speed conveyance with high accuracy.
In the installation of the transmission means 20A and the drive unit 40, a support frame 20a drawn with alternate long and two dashes lines in the figure is screwed to a mounting plate (not shown in the figure) for installation of an additional device, which is previously provided to the sewing machine arm M1a; then the transmission means 20A and the drive unit 40 are fixed to the mounting plate for installation of an additional device. The mounting plate is provided to a face opposed to the sewing machine bed M1b of the sewing machine arm M1a; or the mounting plate may be integrated with the sewing machine arm M1a. In addition, the above-described transmission means 20A and the drive unit 40 may be installed at any positons on the sewing machine if such installment positions cause no problem to operate. The support frame 20a can be transformed according to the installment positions, or sometimes may not be installed.
Fig. 4 is a perspective view showing the transmission means 20A and the drive unit 40 of Embodiment 1. The first pulley 24 is fixed to the arm-shaped plate 21 by means of screws or the like, and second rails 22b (not shown in the figure) provided to the arm-shaped plate 21 are slidably held facing each other across the rotation center of the first pulley 24. The second rails 22b which include blocks 22d having bearings are linked to the arm-shaped plate 21.
Furthermore, the transmission means 20A of the workpiece-moving device 10 includes the mounting plate 23. The mounting plate 23 is a plate for fixing the first pulley 24, the drive unit 40, and the support frame 20a, and enables the transmission means 20A and the drive unit 40 to be integrally installed to the sewing machine arm M1a.
It is also possible to install, on the transmission means 20A, a sensor for detecting an origin position and a detection plate being an object to be detected.
Fig. 5 is a cross-sectional view of the workpiece-moving device 10, taken along B-B line in Fig.3. As shown in the figure, the first pulley 24 is held by a cylinder shaft 44 through a bearing 43. The cylinder shaft 44 is provided with the needle bar 104, the presser device 105, and space for a thread not shown in the figure to move without interference.
If a work W (workpiece) in the figure is too large and bulges over the loading table 32, the work touches guide rollers 31a fixing an outer ring 32a of the loading table 32, guide roller holders 31b fixing thereof, or the frame 31, thereby sometimes becoming an obstacle for sewing. This problem can be solved by providing the loading table 32 with a work holder 33, which prevents the work W from rotating in a hanging down state.
On the loading table 32, two first rails 22a are installed in parallel to each other. The transmission means 20A is connected to the loading table 32 through the first rails 22a, the second rails 22b and the linking components 22c to transmit driving force of the drive unit 40 to the loading table 32 and rotate it.
Although each first rail 22a and each second rail 22b are orthogonally arranged with each other in Embodiment 1, no problem arises even when an oblique intersection arrangement is employed. Although the two parallel first rails 22a are used, the number of the rails is not limited to that number, and a single rail or three or more rails may be used.
Fig. 6 is an exploded perspective view showing the workpiece-moving device 10. In order that the frame 31 can hold the outer ring 32a of the loading table 32 with the loading table 32 being smoothly rotatable, the guide rollers 31a each having a trench and a bearing are fixed to the guide roller holders 31b with pins 31c to be arranged in circumference. The plural guide rollers 31a are arranged; when they are arranged, fine adjustments are made to the guide roller holders 31b to be able to keep the rotation center of the loading table 32 at a fixed position, preventing the loading table 32 from being shifted in z direction perpendicular to the process plane for the workpiece.
The loading table 32 includes a press down frame 34 for holding a placed workpiece (sewing material such as cloth or leather), and an opening S formed in the press down frame 34 according to a target pattern to be sewn; and the press down frame 34 and the opening S is provided to a base plate 32b of the loading table 32.
The press down frame 34 can be opened and closed by means of a hinge 35a; on the back face of the press down frame 34, magnets 35b are arranged to hold the workpiece with magnetic force. Other than the method using the magnets 35b, the workpiece holding method may include a holding means that utilizes a toggle clamp or repulsion of springs. If a workpiece-processing portion including the holding means is separated from the base plate 32b and is made attachable to and removable from the base plate 32b, this makes the sewing machine flexibly operate for variations in workpiece and sewing pattern.
Fig. 7 is a view for explaining a method to attach and remove a workpiece W on the loading table 32. By carrying the frame 31 in x direction and rotating the arm-shaped plate 21 of the transmission means 20A in a direction that does not cause any difficulties for exchanging workpieces W, it becomes possible to open and close the press down frame 34, making the workpieces W easily be attached and removed.
Figs. 8 are top face views schematically showing rotation of the workpiece-moving device 10 of Embodiment 1 according to the present invention. In the figures, a point C is the center of the sewing needle 103 and identical to the rotation center of the transmission means 20A; a point O is the rotation center of the frame 31 connected to the conveyance device 102 not shown in the figures. Fig. 8(A) shows a waiting state in which the point C coincides with the point O; from here, the point C is shifted to a point S, as shown in Fig. 8(B); then, the loading table 32 is rotated counterclockwise by 90 degrees around the point S, as shown in Fig. 8(C).
In Fig. 8(B), the conveyance device 102 carries the frame 31 to a position where the point C being the center of the sewing needle 103 coincides with the point S on the loading table 32. Because the transmission means 20A and the loading table 32 are connected with the first rails 22a and second rails 22b that are arranged to intersect with each other, their relative positions can be arbitrarily set when the frame 31 is translated on x-y plane.
Next, explanation will be made about operation in which the state of Fig. 8(B) is changed to that of Fig. 8(C) by rotating the loading table 32 around the point S counterclockwise by 90 degrees. At the point S being the current position, the sewing needle 103 temporarily halts during its up or down operation for a next stitch in a state in which the sewing needle is being stuck into the workpiece. If the point C being the center of the sewing needle 103 is located at the same position where the point O being the rotation center of the loading table 32 is located, the frame 31 keeps halting at the current position and the transmission means 20A is independently rotated by 90 degrees, to thereby complete rotate operation for a next stitch in the workpiece.
However, in a case where the point C and the point O are not located at the same position, the point S on the loading table 32 into which the sewing needle 103 is stuck is made to be shifted with respect to the sewing needle 103. This causes needle breakage, needle bending, a processing hole enlarged by the needle, or overfeed of the thread, significantly lowering the sewing quality.
In order to solve the problems, while rotation is made by the drive unit 40 around the point C counterclockwise by 90 degrees, taking the distance r between the point C and the point O as a rotation radius, the conveyance device 102 translates the frame 31 so that the point O moves to a point O1 along a circular arc R, as shown in Fig. 8(C). By using the above-described method in the workpiece-moving device 10 of the present invention, the workpiece can be rotated without any restriction at any position in x-y plane in a state in which the position of the center of the sewing needle 103 coincides with a point into which the sewing needle 103 is stuck.
In Embodiment 1, the usage of the transmission means 20A for the workpiece-moving device 10 causes the drive unit 40 to drive and smoothly move the loading table 32 and enables a high accuracy conveyance. Therefore, it is possible to sew with another method described below.
Fig. 9 (A) to Fig. 9 (D) show a process to sew a circular arc pattern. In the figures, the center of a circular arc pattern S coincides with a rotation center O of the loading table 32. In the process, by keeping the frame 31 stopping on y axis and by rotating the transmission means 20A counterclockwise, perfect stitches can be sewn in a circular arc with a radius equivalent to the distance between the rotation center O of the loading table 32 and the center C of the sewing needle 103. However, fewer stitches make the pattern look like a polygon. This sometimes causes a seam formation direction to point to the outside of the θPS region, to which attention should be paid.
By applying the circular arc pattern sewing method, it is also possible to produce a straight line pattern with perfect stitches. This is realized by, while rotating the workpiece or the work to sew, making corrections in y direction in conveyance device 102 so that the seam is formed in a straight line along x direction.
In Embodiment 1, there is a feature in that the drive unit 40 is provided to the sewing machine in separation from the conveyance device 102, which allows rotation around the sewing needle 103 and conveyance of the workpiece on the process plane to be individually performed during sewing operation; therefore, it suffices that the loading table 32 is driven through the transmission means 20A only by the drive unit 40, enabling an efficient sewing.
The workpiece-moving device 10 of the present invention is installed so that the rotation center of the arm-shaped plate 21 coincides with the center of the needle bar 104; however, because the first rails 22a and the second rails 22b slide, it is not necessary that the centers coincide with each other. In addition, applicable shapes are not limited to that shown in the figure; by changing the configuration near attaching portion of the workpiece-moving device according to a sewing machine being an installation target, the workpiece-moving device 10 can be also installed to various kind of sewing machines including the conveyance device 102; it is also easy to restore the sewing machine to that before the workpiece-moving device 10 is installed.
According to the Embodiment 1, the drive unit 40 is installed in separation from the frame and the loading table so as to keep unchanged the drive unit's relative position to the sewing machine even when the frame 31 and the loading table 32 are translated, which thereby causes them not to interfere with each other and eliminates necessities to consider loads due to individual device weights and to consider rotation or translation of wires, enabling an efficient conveyance. Furthermore, rotation around the sewing needle 103 and conveyance on the process plane can be arbitrarily changed, to perform high quality sewing.

Embodiment 2

In the following, explanation will be made about Embodiment 2 not forming part of the present invention, using figures. Components that are also used in Embodiment 1 are designated by the same numerals, and explanation thereof is omitted.
Fig. 10 is a perspective view showing a workpiece-moving device of Embodiment 2. In the figure, a workpiece-moving device 10 includes a frame 31 which is translated by a conveyance motor, a loading table 32 which is disposed rotatably to the frame 31 and translated together with the frame, and on which the workpiece is put, and a regulation means 20B which regulates part of movement of the loading table 32 being translated together with the frame 31 into movement in a direction different from a direction in which the whole loading table 32 is translated.
The regulation means 20B includes a first rail 22a which is connected to at least one part of the loading table 32, a second rail 22b which is arranged skew to the first rail 22a, a linking component 22c which slidably links both of the first rail 22a and the second rail 22b, an arm-shaped plate (holding component) 21 which is placed on the second rail 22b, a brake device 26 which regulates rotation of the arm-shaped plate 21, and a mounting plate 23 on which the brake device 26 is placed.
Here, the first rail 22a is provided with a brake, to regulate sliding movement of the first rail 22a at any position. The brake device 26 and the brake-provided first rail 22a include an air cylinder, a solenoid valve, or the like.
In Embodiment 2, by connecting the frame 31 to the conveyance device 102 and carrying, using the conveyance motor, the conveyance device 102 to any position in x direction and/or y direction, the frame 31 is moved together with the conveyance device 102, and the loading table 32 is also moved. However, the regulation means 20B regulates part of movement of the loading table 32; therefore, the loading table 32 itself is to be controlled so as to move in a direction different from a direction in which the frame 31 is moved; in other words, the loading table 32 itself is to be controlled to move in a direction in which the loading table 32 itself is rotated, as shown in Fig. 8(C).
By providing the loading table 32 with the brake-provided first rail 22a, operation of the first rail 22a can be regulated at any position. This makes it possible to proceed to pattern sewing by releasing the regulation of the first rail 22a after completing rotation, and to rotate the workpiece without any restriction.
According to Embodiment 2 not forming part of the present invention, when performing rotation operation, the workpiece-moving device 10 is operated together so that the conveyance device 102 performs back or forward circular operation around the center of the sewing needle 103 by a desired rotation angle. This enables the workpiece to be rotated around the sewing needle 103 without exclusive rotation power.
The workpiece-moving device of the present invention can be applied to various kinds of sewing machines due to features that the workpiece-moving device can rotate a workpiece around the sewing needle without any restriction, the workpiece-moving device can be operated in separation from the conveyance device, and the workpiece-moving device can be installed without depending on the sewing machine.

Numeral Explanation

M1a: sewing machine arm
M1b: sewing machine bed
10: workpiece-moving device
20A: transmission means
20B: regulation means
20a: support frame
21: arm-shaped plate (holding component)
22a: first rail
22b: second rail
22c: linking component
22d: block
23: mounting plate
24: first pulley
25: belt
26: brake device
31: frame
31a: guide roller
31b: guide roller holder
31c: pin
32: loading table
32a: outer ring
32b: base plate
33: work holder
34: press down frame
35a: hinge
35b: magnet
40: drive unit
41: drive motor
42: second pulley
43: bearing
44: cylinder shaft
101: clamp device
102: conveyance device
103: the sewing needle
104: needle bar
105: presser device
106: needle thread take-up lever
107: slide plate
108: hook

Claims

A workpiece-moving device (10) that translates and rotates a workpiece (W) during operation of a sewing machine (M1), comprising:
a frame (31) to be translated by a conveyance motor;

a loading table (32) on which the workpiece (W) is put, the loading table (32) being disposed rotatably to the frame (31) and translated together with the frame (31);

a drive unit (40) that is installed so as to keep unchanged the drive unit's relative position to the sewing machine (M1) even when the frame (31) and the loading table (32) are translated by the conveyance motor's driving; and

a transmission means (20A), characterised in that it includes:
a first rail (22a) that is connected to at least one portion of the loading table 32;

a second rail (22b) that is arranged skew to the first rail (22a);

a linking component (22c) that slidably links the first rail (22a) to the second rail (22b);

a first pulley (24); and

a holding component (21) that links the second rail (22b) to the first pulley (24),

to transmit driving force of the drive unit (40) to the loading table (32) to rotate the loading table (32).
A workpiece-moving device (10) that translates and rotates a workpiece (W) during operation of a sewing machine (M1), comprising:
a frame (31) to be translated by a conveyance motor;

a loading table on which the workpiece (W) is put, the loading table (32) being disposed rotatably to the frame (31) and translated together with the frame (31);

a drive unit (40) that is installed so as to keep unchanged the drive unit's relative position to the sewing machine (M1) even when the frame (31) and the loading table (32) are translated by the conveyance motor's driving; and

a transmission means (20A), characterised in that it includes:
a first rail (22a) that is connected to at least one portion of the loading table (32);

a second rail (22b) that is arranged skew to the first rail (22a);

a linking component (22c) that slidably links the first rail (22a) to the second rail (22b);

a first gear; and

a holding component (21) that links the second rail (22b) to the first gear,

to transmit driving force of the drive unit (40) to the loading table (32) to rotate the loading table (32).
The workpiece-moving device according to claim 1,
wherein at least one of the linking component (22c) and the holding component (21) is slidably linked to the second rail (22b), and the transmission means (20A) is provided with a belt (25) that is wrapped around the first pulley (24) to rotate the first pulley (24),
and wherein the drive unit (40) includes:
a drive motor (41); and

a second pulley (42) that is linked or directly connected to a rotation shaft of the drive motor (41) and around which the belt (25) is wrapped to transmit driving force.
The workpiece-moving device according to claim 2,
wherein at least one of the linking component (22c) and the holding component (21) is slidably linked to the second rail (22b), and the transmission means (20A) is provided with a chain that is wrapped around the first gear to rotate the first gear,
and wherein the drive unit (40) includes:
a drive motor (41); and

a second gear that is linked or directly connected to a rotation shaft of the drive motor (41) and around which the chain is wrapped to transmit driving force.
The workpiece-moving device according to any one of claim 1 to claim 4, wherein the loading table (32) includes:
a press down frame (34) to hold the workpiece (W); and

an opening (S) that is positioned in the press down frame (34) and fits to a sewing pattern.
A sewing machine (M1) in which the workpiece-moving device (10) according to any one of claim 1 to claim 5 is placed attachably and detachably.