Technical Field
[0001] 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
[0002] 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.
[0003] 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).
Prior Art Document
[0004] [Patent Document 1] Japanese Patent Laid-Open Publication No.
H10-33859
Summary of the Invention
Problem to be Solved by the Invention
[0005] In the above patent document, 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.
[0006] 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.
[0007] 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 to transmit driving force
of the drive unit to the loading table to rotate the loading table.
[0008] Another workpiece-moving device according to 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 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
[0009] 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
[0010]
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 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
[0011] An embodiment of the present invention will be explained below, using figures.
[0012] 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.
[0013] 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.
[0014] 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.
[0015] 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.
[0016] As described above, the clamp device 101 in Fig. 2 can be replaced with the workpiece-moving
device 10 in Fig. 1.
[0017] 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.
[0018] 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.
[0019] 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.
[0020] 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.
[0021] 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.
[0022] 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.
[0023] 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.
[0024] 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.
[0025] 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.
[0026] 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.
[0027] 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.
[0028] 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.
[0029] 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.
[0030] 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.
[0031] 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.
[0032] 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.
[0033] 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.
[0034] 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.
[0035] 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.
[0036] 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.
[0037] 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.
[0038] 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.
[0039] 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.
[0040] 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).
[0041] 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.
[0042] 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.
[0043] 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.
[0044] 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.
[0045] 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.
[0046] 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.
[0047] 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.
[0048] 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.
[0049] 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.
[0050] 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
[0051] In the following, explanation will be made about Embodiment 2 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.
[0052] 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.
[0053] 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.
[0054] 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.
[0055] 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).
[0056] 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-moving device 10 without any restriction.
[0057] According to Embodiment 2 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.
[0058] 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
[0059]
- 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
1. A workpiece-moving device that translates and rotates a workpiece during operation
of a sewing machine, comprising:
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 to transmit driving force of the drive unit to the loading table
to rotate the loading table.
2. The workpiece-moving device according to claim 1,
wherein the transmission means 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,
wherein at least one of the linking component and the holding component is slidably
linked to the second rail, and the transmission means is provided with a belt that
is wrapped around the first pulley to rotate the first pulley,
and wherein the drive unit includes:
a drive motor; and
a second pulley that is linked or directly connected to a rotation shaft of the drive
motor and around which the belt is wrapped to transmit driving force.
3. The workpiece-moving device according to claim 1,
wherein the transmission means 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,
wherein at least one of the linking component and the holding component is slidably
linked to the second rail, and the transmission means is provided with a chain that
is wrapped around the first gear to rotate the first gear,
and wherein the drive unit includes:
a drive motor; and
a second gear that is linked or directly connected to a rotation shaft of the drive
motor and around which the chain is wrapped to transmit driving force.
4. A workpiece-moving device that translates and rotates a workpiece during operation
of a sewing machine, comprising:
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 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.
5. The workpiece-moving device according to claim 4,
wherein the regulation means 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.
6. The workpiece-moving device according to any one of claim 1 to claim 5, wherein the
loading table includes:
a press down frame to hold the workpiece; and
an opening that is positioned in the press down frame and fits to a sewing pattern.
7. A sewing machine in which the workpiece-moving device according to any one of claim
1 to claim 6 is placed attachably and detachably.