JP3749163B2 - Sewing frame drive device for sewing machine - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an apparatus for driving a sewing frame that holds a work cloth in the X direction (left-right direction) and Y direction (front-rear direction) of a sewing machine.
[0002]
[Prior art]
Conventionally, a sewing frame driving device as shown in FIG. 4 has been proposed in Japanese Patent Laid-Open No. 2001-271261. This conventional apparatus includes an X feed frame 52 that sends the sewing frame 51 in the X direction, two front and rear X drive mechanisms 53 that drive the X feed frame 52 in the X direction, and a Y feed frame that sends the sewing frame 51 in the Y direction. 54 and two Y drive mechanisms 55 for driving the Y feed frame 54 in the Y direction. The X feed frame 52 and the Y feed frame 54 intersect on the table 56, and two X drive mechanisms 53 are installed below the table 56. The two Y drive mechanisms 55 are disposed above the table 56 and include a motor 58 and a drive shaft 59 on an upper frame 57.
[0003]
[Problems to be solved by the invention]
According to this conventional apparatus, since one Y drive mechanism 55 crosses the X drive mechanism 53 above the table 56, the two drive mechanisms 53, 55 can be connected to each other without extending the length of the sewing machine in the X direction. There is an advantage that interference can be prevented and the sewing frame 51 can be largely driven with a compact configuration. However, according to the conventional apparatus, since both of the Y drive mechanisms 55 are installed above the table 56, the upper part of the table 56 becomes complicated, the appearance is deteriorated, and the outlook in the factory is deteriorated. . Further, since a large number of rotating bodies such as the motor 58 and the drive shaft 59 are arranged above the table 56, there is a problem that vibration and noise increase.
[0004]
SUMMARY OF THE INVENTION An object of the present invention is to provide a sewing frame driving apparatus that can solve the above-mentioned problems, can drive a sewing frame with a compact configuration, can simplify the upper part of the table, and can suppress vibration and noise.
[0005]
[Means for Solving the Problems]
In order to solve the above-described problems, a sewing frame driving device for a sewing machine according to the present invention is a device that drives a sewing frame holding a work cloth in the X direction and the Y direction on a table, and sends the sewing frame in the X direction. An X feed frame, an X drive mechanism for driving the X feed frame in the X direction, a Y feed frame for feeding the sewing frame in the Y direction, and a plurality of Y drive mechanisms for driving the Y feed frame in the Y direction. The drive mechanism is installed below the table, the Y drive mechanism that intersects with the X drive mechanism is installed above the table, and the remaining Y drive mechanisms are installed below the table.
[0006]
Here, the direction of the X feed frame and the Y feed frame is not particularly limited. When the sewing frame is driven on both sides vertically and horizontally, the two feed frames may intersect on the table, and the sewing frame In the case of cantilever driving with only sides, both feed frames may be arranged on the table in parallel with the X direction. The number of X drive mechanisms is not particularly limited, and may be two or three in the Y direction, or one in the center. The number of Y drive mechanisms may be at least two with a mutual interval in the X direction, and may be three, four, or more.
[0007]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, an embodiment in which the present invention is embodied in an embroidery sewing machine will be described with reference to the drawings. As shown in FIG. 1, in this embroidery sewing machine, an upper frame 1 is equipped with one head 2, and a bed 3 is installed directly under the head 2. A table 4 is disposed at the same height as the bed 3, and a sewing frame 5 that holds a work cloth on the table 4 is driven in the X direction (left-right direction) and the Y direction (front-back direction).
[0008]
The sewing frame driving device includes one X feed frame 6 that feeds the sewing frame 5 in the X direction, three front and rear X drive mechanisms 7 that drive the X feed frame 6 in the X direction, and the sewing frame 5 in the Y direction. One Y feed frame 8 to be sent and a Y drive mechanism 9 arranged at three left and right intervals for driving the Y feed frame 8 in the Y direction are configured. The X feed frame 6 and the Y feed frame 8 are arranged so as to intersect on the table 4, the right side of the sewing frame 5 is attached to the X feed frame 6, and the rear side of the sewing frame 5 is attached to the Y feed frame 8. Yes.
[0009]
All three X drive mechanisms 7 are installed below the table 4, and their output portions 11 are connected to the front end portion, rear end portion and intermediate portion of the X feed frame 6. Of the Y drive mechanism 9, the right Y drive mechanism 9 </ b> A intersecting with the X drive mechanism 7 is installed above the table 4, and its output unit 12 is connected to the right end of the Y feed frame 8. The remaining two Y drive mechanisms 9B and 9C that do not intersect with the X drive mechanism 7 are installed below the table 4, and the output portion 13 is connected to the left end portion and the middle portion of the Y feed frame 8.
[0010]
As shown in FIG. 2, four pulleys 16 are provided on the machine casing 15 of the Y drive mechanism 9 </ b> A, and a belt 17 that is long in the Y direction is stretched around the pulley 16. The belt 17 is driven by a motor 18 via a drive shaft 19, and the motor 18 and the drive shaft 19 are disposed at the rear end at substantially the same height as the table 4. The output unit 12 is coupled to a part of the belt 17, a slider 20 is attached to the output unit 12, and a rail 21 that guides the slider 20 in the Y direction is provided on the machine frame 15.
[0011]
As shown in FIG. 3, two pulleys 24 are supported on the machine casing 23 of the Y drive mechanisms 9 </ b> B and 9 </ b> C, and a long belt 25 is stretched around the pulley 24 in the Y direction. The belt 25 is driven at the same speed as the belt 17 through the drive shaft 19 by the motor 18 common to the Y drive mechanism 9A. The output unit 13 is coupled to a part of the belt 25, a slider 26 is attached to the output unit 13, and a rail 27 that guides the slider 26 in the Y direction is provided on the machine frame 23. The machine frame 23 is assembled with a guide 28 that is long in the Y direction, and a slit 29 that exposes the output unit 13 on the table 4 is formed in the guide 28.
[0012]
The output units 12 and 13 of these Y drive mechanisms 9 are connected to the Y feed frame 8, and the rear side of the sewing frame 5 is attached to the Y feed frame 8 via a fixture 30. A plurality of rollers 31 are supported on the fixture 30, and a rail 32 for guiding the rollers 31 in the X direction is provided on the Y feed frame 8. The sewing frame 5 is coupled to the Y feed frame 8 so as to be movable in the X direction by the engagement between the roller 31 and the rail 32.
[0013]
The X drive mechanism 7 is configured in substantially the same manner as the Y drive mechanisms 9B and 9C, and is installed below the table 4. The motor 34 and the drive shaft 35 (see FIG. 1) of the X drive mechanism 7 are disposed at the right end thereof at substantially the same height as the table 4, and the output unit 11 is exposed on the table 4 from the slit 37 of the guide 36. The right side of the sewing frame 5 is coupled to the X feed frame 6 via a fixture similar to the fixture 30 so as to be movable in the Y direction.
[0014]
In the sewing frame drive device having the above-described configuration, when the motor 34 of the X drive mechanism 7 and the motor 18 of the Y drive mechanism 9 are simultaneously driven, the X feed frame 6 is driven in the X direction at a fixed position in the Y direction, The Y feed frame 8 is driven in the Y direction at a fixed position in the X direction. Then, the sewing frame 5 is fed in the X direction along the Y feed frame 8 by the X feed frame 6 on the table 4, and is fed in the Y direction along the X feed frame 6 by the Y feed frame 8. The target location is positioned at the sewing point of the bed 3.
[0015]
According to the sewing frame driving device of the present embodiment, the following effects can be obtained.
(A) Of the three Y drive mechanisms 9, the right Y drive mechanism 9A intersects the X drive mechanism 7 above the table 4, so that X, X, The mutual interference between the Y drive mechanisms 7 and 9 can be prevented, and the sewing frame 5 can be driven with a large stroke with a compact configuration.
(B) Since the remaining two Y drive mechanisms 9B and 9C are installed below the table 4, the upper part of the table 4 can be simplified, the appearance of the embroidery sewing machine is improved, and the view in the sewing factory is improved.
(C) The motor 18 and the drive shaft 19 common to the three Y drive mechanisms 9 and the pulleys 24 and the belts 25 of the two Y drive mechanisms 9B and 9C are arranged at the same height as or lower than the table 4. The number of rotating bodies above the table 4 can be reduced, and vibration and noise can be suppressed.
[0016]
In addition, this invention is not limited to the structure of the said embodiment, For example, as follows, it can also be changed and embodied suitably in the range which does not deviate from the meaning of invention.
(1) In the embroidery sewing machine, the X drive mechanism is reduced to two front and rear, the Y drive mechanism is reduced to two left and right, one Y drive mechanism is installed above the table, and the other Y drive mechanism is below the table. To be installed.
(2) In a multi-head embroidery sewing machine in which a large number of heads and beds are arranged side by side in the X direction, one or two Y drive mechanisms that intersect with the X drive mechanism are installed above the table, and the remaining Y drive mechanisms are mounted from the table. Install it below.
(3) In both X and Y drive mechanisms, a rack and pinion drive system or a ball screw drive system is adopted instead of the belt drive system.
(4) A linear motor is used for the Y drive mechanism above the table, and the rotating body above the table is eliminated to further improve the vibration and sound insulation performance.
[0017]
【The invention's effect】
As described above in detail, according to the sewing frame drive device for a sewing machine according to the present invention, the Y drive mechanism intersecting with the X drive mechanism is installed above the table, and the remaining Y drive mechanisms are installed below the table. The sewing frame can be greatly driven with a compact configuration, and the upper portion of the table can be simplified, and the vibration and noise can be suppressed.
[Brief description of the drawings]
FIG. 1 is a plan view of an embroidery sewing machine showing an embodiment of a sewing frame driving device according to the present invention.
FIG. 2 is a cross-sectional view taken along line AA in FIG.
FIG. 3 is a cross-sectional view taken along line BB in FIG.
FIG. 4 is a plan view showing a conventional sewing frame driving device.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Upper frame 2 Head 3 Bed 4 Table 5 Sewing frame 6 X feed frame 7 X drive mechanism 8 Y feed frame 9 Y drive mechanism 17 Belt 18 Motor 19 Drive shaft 25 Belt 30 Mounting tool 34 Motor 35 Drive shaft

Claims (1)

A device for driving a sewing frame holding a work cloth in the X and Y directions on a table,
An X feed frame that feeds the sewing frame in the X direction, an X drive mechanism that drives the X feed frame in the X direction, a Y feed frame that feeds the sewing frame in the Y direction, and a plurality of Y that drives the Y feed frame in the Y direction A drive mechanism,
Sewing frame drive of the sewing machine characterized in that the X drive mechanism is installed below the table, the Y drive mechanism intersecting with the X drive mechanism is installed above the table, and the remaining Y drive mechanism is installed below the table apparatus.

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