JP2005296501A - Sewing machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a sewing machine carrying out stable embroidery. <P>SOLUTION: On the basis of the moving quantity data of embroidery pattern data obtained from a storage means (ROM 102), the sewing machine (1) calculates moving quantity of a holding frame (10) moved in an X-axis direction by an X driving stepping motor (11) and a composited moving quantity of the frame (10) moved in a composition direction obtained by compositing the moving quantity moved in a Y-axis direction and a Y driving stepping motor (12). The needle bar speed (the revolution speed, the number of revolutions of a main spindle motor 5) of a needle bar driving means is set so as to vertically move a needle bar 8 (a sewing needle 8a) for one stitch according to the width of one stitch (the length of a stitch) in the embroidery pattern being the calculated composited moving quantity. Thus, a stitch of the same sewing width for one stitch is formed by the same needle bar speed. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a sewing machine, and more particularly to a sewing machine that performs embroidery on a sewing product held by a holding frame.

2. Description of the Related Art Conventionally, an embroidery sewing machine that performs embroidery on an object to be sewn held by an embroidery frame that is a holding frame is known (see, for example, Patent Document 1).
The embroidery sewing machine moves the needle bar that holds the sewing needle up and down, and the embroidery frame that holds the sewing object in the X-axis direction (left and right direction) orthogonal to each other on a plane perpendicular to the vertical movement direction of the needle bar. By moving in the Y-axis direction (front-rear direction), various embroidery patterns are sewn and formed on the workpiece. In such an embroidery sewing machine, the needle bar moves up and down as the spindle motor rotates, and the embroidery frame is moved in the X and Y axis directions by the X and Y driving stepping motors, respectively. It has become so.

When this embroidery sewing machine performs embroidery, the control unit of the sewing machine reads the embroidery pattern data corresponding to the embroidery pattern stored in the storage means, and uses the movement amount when moving the embroidery frame to perform the embroidery. A movement amount (Xn) in a certain X-axis direction and a movement amount (Yn) in the Y-axis direction are acquired. As the movement amounts are acquired, the control unit of the sewing machine compares the movement amount (Xn) of the acquired embroidery frame in the X-axis direction with the movement amount (Yn) in the Y-axis direction, and moves the movement. The rotational speed of the spindle motor is determined according to the value with the larger amount (absolute value of the moving amount) (the moving distance is longer).
Then, in order for the embroidery sewing machine to perform embroidery, the spindle motor that moves the needle bar up and down at the determined rotational speed at the timing of moving the embroidery frame in the X-axis direction and the Y-axis direction according to the obtained movement amount. It is designed to rotate.
Japanese Patent No. 2923934

  However, in the case of Patent Document 1, the rotational speed of the spindle motor that moves the needle bar up and down depends on the amount of movement (Xn) that the embroidery frame moves in the X-axis direction and the amount of movement (Yn) that moves in the Y-axis direction. Even if the sewing width of the embroidery pattern is constant, the rotational speed of the spindle motor changes due to the change in the direction of movement of the embroidery frame. However, there is a problem that the texture is not stable and the texture may be partially different.

Specifically, as shown in FIG. 6, when sewing an arc-shaped embroidery pattern with a constant sewing width (for example, 5 mm), the embroidery frame is 5 mm in the X-axis direction and Y-axis direction as in the case of the seam A. By moving 0 mm as well as by moving the embroidery frame 5 / √2 mm in the X-axis direction and 5 / √2 mm in the Y-axis direction like the seam B, it is possible to form a seam with a stitch width of 5 mm. it can.
When forming the seam A, the spindle motor rotates by one stitch so as to match the timing when the embroidery frame moves 5 mm, and when forming the seam B, it matches the timing when the embroidery frame moves 5 / √2 mm. The spindle motor rotates by one stitch. That is, the longer the embroidery frame moves (in this case, when the seam A is formed), the longer it takes to move. Therefore, in order to form one stitch, the main spindle motor The rotation speed is slowed down to match the timing. Similarly, as the embroidery frame moves by a smaller amount of movement (in this case, when the seam B is formed), the time required for that movement becomes shorter. The timing of the motor is adjusted by increasing the rotational speed of the motor.
Thus, even if the stitch width in the embroidery pattern is the same, the moving direction of the embroidery frame is different, and the rotational speed of the spindle motor that moves the needle bar up and down is different, so that the stitching texture is not stable, The texture may be partially different, which may be a problem.

  An object of the present invention is to provide a sewing machine capable of performing stable embroidery.

  In order to solve the above-described problems, the invention described in claim 1 includes a needle bar driving means for moving the needle bar that holds the sewing needle up and down, and a direction that holds the workpiece and is orthogonal to the vertical movement direction of the needle bar. A movable holding frame, a first holding frame driving means for moving the holding frame in one direction relative to the needle bar, and a second holding frame for moving the holding frame in the other direction relative to the needle bar A first holding frame driving unit for moving the holding frame to move the holding frame so as to form a predetermined embroidery pattern; a second holding frame driving unit; Storing means for storing embroidery pattern data obtained by combining a plurality of movement amount data corresponding to movement amounts in other directions for moving the holding frame, and embroidery pattern data acquiring means for acquiring embroidery pattern data from the storage means The embroidery pattern data acquired by the embroidery pattern data acquisition means One direction in which the holding frame is moved by the first holding frame driving means and the second holding frame driving means based on the movement amount in one direction and the movement amount in the other direction in the movement amount data. Based on the combined movement amount calculated in the combining direction calculated by the moving amount calculation means, the needle bar driving means moves the needle bar up and down based on the combined movement amount calculated in the combining direction by combining the other directions. A needle bar speed setting means for setting the needle bar speed to be moved, and the first holding frame driving means and the first holding frame driving means based on the movement amount data of the embroidery pattern data acquired by the embroidery pattern data acquisition means. When the second holding frame driving means moves the holding frame, the needle bar driving means moves the needle bar up and down at the needle bar speed set by the needle bar speed setting means.

According to the first aspect of the present invention, the sewing machine moves the holding frame that holds the workpiece and is movable in a direction perpendicular to the vertical movement direction of the needle bar in one direction relative to the needle bar. Holding frame driving means and second holding frame driving means for moving the holding frame in the other direction with respect to the needle bar.
When the sewing machine sews the embroidery pattern, the first holding frame driving means for moving the holding frame so as to form the predetermined embroidery pattern stored in the storage means moves the holding frame. Embroidery pattern data obtained by combining a plurality of movement amount data in which the movement amount in one direction to be associated with the movement amount in the other direction in which the second holding frame driving unit moves the holding frame is acquired. Based on the movement amount in one direction and the movement amount in the other direction in the movement amount data of the embroidery pattern data, the holding frame is moved by the first holding frame driving means and the second holding frame driving means. A combined movement amount in the combining direction obtained by combining the one direction and the other direction is calculated. Based on the calculated combined movement amount in the combined direction, the needle bar speed at which the needle bar driving means moves the needle bar up and down is set.
When the first holding frame driving unit and the second holding frame driving unit of the sewing machine move the holding frame in one direction and the other direction based on the movement amount data of the embroidery pattern data acquired in this way. In addition, the needle bar driving means moves the needle bar up and down at a set needle bar speed.

  In other words, the sewing machine moves based on the movement amount data of the embroidery pattern data, the amount of movement of the holding frame in one direction by the first holding frame driving means, and the movement in the other direction by the second holding frame driving means. By calculating a combined movement amount in the combining direction that is combined with the movement amount to be combined, the stitch width (the length of the seam) for one stitch in the embroidery pattern can be obtained. Then, according to the stitch width (seam length) of one stitch in the embroidery pattern that is the calculated combined movement amount, the needle of the needle bar driving means moves the needle bar (sewing needle) up and down by one stitch. You can set the rod speed. Therefore, stitches having the same stitch width for one stitch can be formed at the same needle bar speed.

In this way, by forming the stitches having the same stitch width for one stitch at the same needle bar speed, the stitched texture is stabilized in the stitched embroidery pattern, and an overall embroidery pattern is formed. be able to.
Therefore, it can be said that the sewing machine is a sewing machine that can form a stable embroidery pattern and perform stable embroidery.

  The invention according to claim 2 is a needle bar driving means for moving the needle bar holding the sewing needle up and down, a holding frame that holds the workpiece and is movable in a direction perpendicular to the vertical movement direction of the needle bar, A first holding frame driving means for moving the holding frame in one direction relative to the needle bar; a second holding frame driving means for moving the holding frame in the other direction relative to the needle bar; and a predetermined embroidery pattern The first holding frame driving means moves the holding frame so as to form the movement amount in one direction in which the holding frame moves, and the second holding frame driving means moves the holding frame in the other direction. Acquired by storage means for storing embroidery pattern data combining a plurality of movement amount data corresponding to movement amounts in the direction, embroidery pattern data acquisition means for acquiring embroidery pattern data from the storage means, and embroidery pattern data acquisition means Of the movement amount data of the processed embroidery pattern data Based on the amount of movement and the amount of movement in the other direction, the first holding frame driving means and the second holding frame driving means combine the one direction in which the holding frame is moved with the other direction. The moving angle calculating means for calculating the moving angle in the combined direction and the needle bar speed at which the needle bar driving means moves the needle bar up and down according to the moving angle in the combined direction calculated by the moving angle calculating means is set. A needle bar speed setting unit that performs a first holding frame driving unit and a second holding frame driving unit based on movement amount data of the embroidery pattern data acquired by the embroidery pattern data acquiring unit. When moving the holding frame, the needle bar driving means moves the needle bar up and down at the needle bar speed set by the needle bar speed setting means.

According to the second aspect of the invention, the sewing machine moves the holding frame that holds the workpiece and is movable in a direction perpendicular to the vertical movement direction of the needle bar in one direction with respect to the needle bar. Holding frame driving means and second holding frame driving means for moving the holding frame in the other direction with respect to the needle bar.
When the sewing machine sews the embroidery pattern, the first holding frame driving means for moving the holding frame so as to form the predetermined embroidery pattern stored in the storage means moves the holding frame. Embroidery pattern data obtained by combining a plurality of movement amount data in which the movement amount in one direction to be associated with the movement amount in the other direction in which the second holding frame driving unit moves the holding frame is acquired. Based on the movement amount in one direction and the movement amount in the other direction in the movement amount data of the embroidery pattern data, the holding frame is moved by the first holding frame driving means and the second holding frame driving means. The movement angle in the composite direction obtained by combining the one direction and the other direction is calculated. Based on the calculated movement angle in the combining direction, the needle bar speed at which the needle bar driving means moves the needle bar up and down is set.
When the first holding frame driving unit and the second holding frame driving unit of the sewing machine move the holding frame in one direction and the other direction based on the movement amount data of the embroidery pattern data acquired in this way. In addition, the needle bar driving means moves the needle bar up and down at a set needle bar speed.

That is, the sewing machine has one direction in which the holding frame is moved by the first holding frame driving unit and the other direction in which the holding frame is moved by the second holding frame driving unit based on the movement amount data of the embroidery pattern data. By calculating the moving angle in the combining direction, which is the combined moving direction, the direction of the seam in the embroidery pattern and the angle at which the holding frame moves to form the seam can be divided.
For example, the section is divided into a range on the side close to the X axis that is one direction and the Y axis that is the other direction, and a side that is apart from the X axis that is the one direction and the Y axis that is the other direction. It is a division from a range. Specifically, for example, an X axis that is in the range of 0 ° to 30 ° and 60 ° to 90 °, a range on the side close to the Y axis, and an X axis that is greater than 30 ° and less than 60 ° The range can be divided as shown in FIG.
Then, the needle bar speed of the needle bar driving means can be set so that the needle bar (sewing needle) is moved up and down by one stitch according to the range of movement angles divided by the calculated movement angle. Accordingly, in the range close to the X axis which is one direction and the Y axis which is the other direction and the range in which the holding frame moves is relatively large, the needle bar speed at which the needle bar moves is slow. As described above, the needle bar driving means is controlled, and is a range on the side away from both the X-axis that is one direction and the Y-axis that is the other direction. The needle bar can be moved up and down by controlling the needle bar driving means so that the needle bar speed at which the bar moves increases.

Thus, the calculated moving angle (the moving direction obtained by combining the one direction in which the holding frame is moved by the first holding frame driving unit and the other direction in which the holding frame is moved by the second holding frame driving unit). The needle bar speed can be set according to the amount of movement of the holding frame (the amount of movement in one direction or the amount of movement in the other direction) for each range divided based on the movement angle in the composition direction). Since the embroidery pattern can be formed at a needle bar speed suitable for each range, the stitched texture can be stabilized in the embroidery pattern that has been sewn, and an overall embroidery pattern can be formed.
Therefore, it can be said that the sewing machine is a sewing machine that can form a stable embroidery pattern and perform stable embroidery.

According to the first aspect of the present invention, the sewing machine has a movement amount by which the holding frame is moved in one direction by the first holding frame driving means based on the movement amount data of the embroidery pattern data, and the second holding frame. By calculating the combined movement amount in the combining direction by combining the moving amount moved in the other direction by the driving means, the stitch width (the length of the stitch) for one stitch in the embroidery pattern can be obtained. Then, according to the stitch width (seam length) of one stitch in the embroidery pattern that is the calculated combined movement amount, the needle of the needle bar driving means moves the needle bar (sewing needle) up and down by one stitch. You can set the rod speed. Therefore, stitches having the same stitch width for one stitch can be formed at the same needle bar speed.
In this way, by forming the stitches having the same stitch width for one stitch at the same needle bar speed, the stitched texture is stabilized in the stitched embroidery pattern, and an overall embroidery pattern is formed. be able to.
Therefore, it can be said that the sewing machine is a sewing machine that can form a stable embroidery pattern and perform stable embroidery.

According to the second aspect of the present invention, the sewing machine has one direction in which the holding frame is moved by the first holding frame driving unit and the second holding frame driving unit based on the movement amount data of the embroidery pattern data. By calculating the movement angle in the composite direction, which is the combined movement direction with the other directions to be moved, the direction of the seam in the embroidery pattern is divided, and the angle at which the holding frame moves to form the seam is divided can do. Then, the needle bar speed of the needle bar driving means can be set so that the needle bar (sewing needle) is moved up and down by one stitch according to the range of movement angles divided by the calculated movement angle. Therefore, for example, in a range close to the X axis that is one direction and the Y axis that is the other direction, and the range in which the movement amount of the holding frame is relatively large, the needle bar speed at which the needle bar moves is slow. In the range where the needle bar driving means is controlled so that both the X-axis as one direction and the Y-axis as the other direction are separated from each other, and the movement amount of the holding frame is relatively small The needle bar can be moved up and down by controlling the needle bar driving means so that the needle bar speed at which the needle bar moves becomes faster.
Thus, the calculated moving angle (the moving direction obtained by combining the one direction in which the holding frame is moved by the first holding frame driving unit and the other direction in which the holding frame is moved by the second holding frame driving unit). The needle bar speed can be set according to the amount of movement of the holding frame (the amount of movement in one direction or the amount of movement in the other direction) for each range divided based on the movement angle in the composition direction). Since the embroidery pattern can be formed at a needle bar speed suitable for each range, the stitched texture can be stabilized in the embroidery pattern that has been sewn, and an overall embroidery pattern can be formed.
Therefore, it can be said that the sewing machine is a sewing machine that can form a stable embroidery pattern and perform stable embroidery.

  An embodiment of the present invention will be described with reference to FIGS.

(Embodiment 1)
In the present embodiment, an electronic embroidery sewing machine will be described as an example of the sewing machine. The electronic embroidery sewing machine has a holding frame (embroidery frame) for holding a cloth to be embroidered, and the holding frame moves relative to the sewing needle, whereby a predetermined embroidery pattern is formed on the cloth held by the holding frame. The sewing machine forms a seam (embroidery) based on a pattern.
Here, the direction in which the sewing needle 8a held by a needle bar 8 to be described later moves up and down is defined as the Z-axis direction (vertical direction), and one direction orthogonal thereto is defined as the X-axis direction (left-right direction). A direction perpendicular to both the X-axis direction and the X-axis direction is defined as a Y-axis direction (front-rear direction).

  As shown in FIG. 1, an electronic embroidery sewing machine 1 (hereinafter referred to as a sewing machine 1) includes a sewing machine frame 2 whose outer shape is substantially U-shaped when viewed from the front. The sewing machine frame 2 connects an arm portion 2a that forms the upper portion of the sewing machine 1 and extends leftward in the drawing, a bed portion 2b that forms the lower portion of the sewing machine 1 and extends leftward in the drawing, and the arm portion 2a and the bed portion 2b. And a vertical body portion 2c.

The sewing machine 1 includes a main shaft (not shown) and a lower shaft (not shown) that are provided with a power transmission mechanism in a sewing machine frame 2 and that are rotatable and extend in the left-right direction. The main shaft (not shown) is arranged inside the arm portion 2a, and the lower shaft (not shown) is arranged inside the bed portion 2b.
The main shaft (not shown) is connected to a main shaft motor 5 (see FIG. 2), and rotational power is applied by the main shaft motor 5. Further, the lower shaft (not shown) is connected to the main shaft through a vertical axis (not shown), and when the main shaft rotates, the power of the main shaft is transmitted to the lower shaft side through the vertical axis (not shown), The lower shaft rotates.
A needle bar 8 that moves up and down in the Z-axis direction by rotation of the main shaft is connected to the distal end side of the main shaft (not shown), and the lower end of the needle bar 8 is sewn as shown in FIG. A needle 8a is provided. The spindle motor 5 and the spindle (not shown) function as needle bar driving means for moving the needle bar 8 up and down.
Further, the arm 2a is a known intermediate presser that moves up and down in conjunction with the vertical movement of the needle bar 8 and presses the cloth around the sewing needle 8a in order to prevent the cloth from lifting due to the vertical movement of the sewing needle 8a. 9 is provided.
Further, a hook (not shown) is provided on the tip side of the lower shaft (not shown). When the lower shaft rotates together with the main shaft, a seam is formed by the cooperation of the sewing needle 8a and the shuttle (not shown).
The connection configuration of the main shaft (not shown), the main shaft motor 5, the needle bar 8, the sewing needle 8a, the lower shaft (not shown), the shuttle (not shown), and the like is the same as that of a conventionally known one. Do not mention.

Further, as shown in FIG. 1, a cloth holding surface 22 is formed on the bed portion 2b, and the holding frame 10 and the sewing needle 8a are arranged above the cloth holding surface 22. Yes.
The holding frame 10 is attached to a holding frame driving unit 10a disposed on the upper surface (cloth holding surface 22) of the bed 2b. The holding frame driving unit 10a includes an X driving stepping motor 11 as a first holding frame driving unit and a Y driving stepping motor 12 as a second holding frame driving unit. 10 are connected.
The holding frame 10 holds a cloth as a sewing object, and the cloth held by the X driving stepping motor 11 and the Y driving stepping motor 12 is moved in the front-rear and left-right directions together with the holding frame 10. . By the movement of the holding frame 10 and the operation of the sewing needle 8a and the hook (not shown), a seam (embroidery pattern) based on a predetermined sewing pattern is formed on the cloth.

A display unit 7 is provided on the front side of the sewing machine frame 2. The display unit 7 is connected to a control unit 100 described later (see FIG. 2).
The display unit 7 includes, for example, a liquid crystal display mechanism unit and a touch panel mechanism unit. The display unit 7 displays a plurality of operation keys, various setting values, an image of a stitch shape (embroidery pattern), and the like, and touch panel type operation input is possible. It has become.

Further, as shown in FIG. 2, the sewing machine 1 includes a control unit 100 connected to the display unit 7, the spindle motor 5, the X drive stepping motor 11, the Y drive stepping motor 12, and the like. The spindle motor 5 is connected to the control unit 100 via the spindle motor drive circuit 5 a, and the X drive stepping motor 11 and the Y drive stepping motor 12 are connected via the stepping motor drive circuit 13.
The control unit 100 includes a CPU 101, a ROM 102, and a RAM 103. A ROM 102 and a RAM 103 are connected to the CPU 101 via a bus.

  The CPU 101 centrally controls the operation of each unit according to various control programs for the embroidery sewing machine stored in the ROM 102 in accordance with signals input from the display unit 7, various set values, data, and the like, and the processing results are stored in the RAM 103. Store in the work area. Then, the CPU 101 controls the driving of each part constituting the sewing machine 1.

In the ROM 102, control programs and control data of the sewing machine 1 or data related to various sewing and embroidery are written.
In particular, the ROM 102 stores a plurality of embroidery pattern data for the sewing machine 1 to form various embroidery patterns as storage means. Here, the embroidery pattern data refers to the amount of movement by which the X drive stepping motor 11 moves the holding frame 10 in the X-axis direction (one direction) for moving the holding frame 10 so as to form a predetermined embroidery pattern. And a combination of a plurality of movement amount data in which the Y drive stepping motor 12 corresponds to the movement amount by which the holding frame 10 is moved in the Y-axis direction (other direction).
For example, embroidery pattern data for embroidering an isosceles triangular frame shape (outer shape pattern) as shown in FIG. 3 is movement amount data (movement amount in the X-axis direction; Xn) of the holding frame 10 from the origin O. , The amount of movement in the Y-axis direction; Yn) is a combination of three in order “(+2, 0), (−1, +2), (−1, −2)”.

  Further, in the ROM 102, the CPU 101 (control unit 100) adjusts the rotation of the spindle motor 5, and the spindle motor 5 for adjusting the speed at which the spindle motor 5, which is a needle bar driving means, moves the needle bar 8 up and down. A movement amount rotation speed setting table in which the rotation speed is associated with the movement amount of the holding frame 10 is stored.

  The RAM 103 is provided with various work memories and counters, and is used as a work area during the sewing operation.

  The control unit 100 controls the rotation of the spindle motor 5 and the operations of the X drive stepping motor 11 and the Y drive stepping motor 12 based on a predetermined program, and moves up and down by turning the spindle (not shown). The operation of the bar 8 and the sewing needle 8a, the movement of the holding frame 10 operated by each stepping motor, and the like are controlled, and the sewing operation (sewing operation of the embroidery pattern) in the sewing machine 1 is controlled.

  Further, the control unit 100 controls the embroidery pattern data acquisition unit to select and acquire from the ROM 102 embroidery pattern data that is input by a touch panel operation on the display unit 7 and that corresponds to a specified embroidery pattern.

Further, the control unit 100 uses the movement amount data of the embroidery pattern data acquired by the embroidery pattern data acquisition unit (control unit 100) as the movement amount calculation unit. Control is performed to calculate a combined movement amount (Ln = √ (Xn ² + Yn ² )) that is moved by the motor 12 in a direction that combines the X-axis direction and the Y-axis direction.
For example, in the case of the embroidery pattern shown in FIG. 3, the movement amount L1 due to the movement from the origin O to (+2, 0) is L1 = √ ((+ 2) ² + (0) ² ) = 2, and then (−1, The movement amount L2 due to the movement of +2) is L2 = √ ((− 1) ² + (+ 2) ² ) = √5, and the movement amount L3 due to the movement of (−1, −2) is L3 = √ ( The combined movement amount is calculated as (−1) ² + (+ 2) ² ) = √5.

In addition, the control unit 100 serves as a needle bar speed setting unit based on the combined movement amount in the combination direction calculated by the movement amount calculation unit (control unit 100). Control to set the needle bar speed to move the needle up and down.
For example, the control unit 100 serving as a needle bar speed setting unit is based on a movement amount rotation speed setting table stored in the ROM 102 and corresponding to the rotation speed of the spindle motor 5 and the combined movement amount of the holding frame 10. The rotational speed of the spindle motor 5 is set from the combined movement amount calculated by the movement amount calculating means (control unit 100), and the needle bar speed at which the needle bar 8 moves up and down is set. For example, in the rotational speed setting table for the moving amount, the combined moving amount and the main shaft of the holding frame 10 are set such that the rotational speed of the spindle motor is 500 rpm for the combined moving amount 4 mm and the rotational speed of the main shaft motor is 250 rpm for the combined moving amount 6 mm. The rotation speed and rotation speed of the motor 5 are associated with each other.

  Next, the operation of the sewing machine 1 according to the first embodiment, particularly the processing operation for setting the rotation speed and the rotation speed of the spindle motor 5 based on the embroidery pattern data will be described with reference to the flowchart shown in FIG.

First, in a state where the main power supply of the sewing machine 1 is turned on, the control unit 100 selects and acquires the embroidery pattern data corresponding to the designated embroidery pattern from the ROM 102, which is input by the touch panel operation of the display unit 7 (step 100). S101).
Next, the control unit 100 combines the X axis direction and the Y axis direction in which the holding frame 10 is moved by the X drive stepping motor 11 and the Y drive stepping motor 12 based on the movement amount data in the acquired embroidery pattern data. A combined movement amount (Ln) in the determined direction is calculated (step S102).
Next, the control unit 100 sets the rotation speed and rotation speed of the spindle motor 5 according to the movement amount rotation speed setting table based on the calculated combined movement amount (Ln). The moving needle bar speed is set (step S103).
The control unit 100 adjusts the needle bar according to the set rotation speed (rotational speed) of the spindle motor 5 in accordance with the timing of moving the holding frame 10 by one needle based on the movement amount data in the acquired embroidery pattern data. 8 is moved up and down by one stitch to form a stitch for one stitch of the embroidery pattern (step S104).

Next, the control unit 100 determines whether there is next movement amount data in the acquired embroidery pattern data (step S105).
When the control unit 100 determines that there is the next movement amount data (step S105; Yes), the process returns to step S102 and is repeated to form the next stitch.
On the other hand, when the control unit 100 determines that there is no next movement amount data (step S105; No), the sewing (seam) in the acquired embroidery pattern data is finished, the embroidery pattern is completed, and the spindle motor 5 is stopped. (Step S106), and the sewing is finished.

  As described above, the sewing machine 1 according to the present invention is based on the movement amount data of the embroidery pattern data, and the movement amount (Xn) by which the holding frame 10 is moved in the X-axis direction by the X driving stepping motor 11 and the Y driving stepping motor. 12 is combined with the amount of movement (Yn) moved in the Y-axis direction to calculate the combined moving amount (Ln) in the combining direction, thereby sewing the stitch width (seam length) for one stitch in the embroidery pattern. Can be requested. Then, according to the stitch width (seam length) of one stitch in the embroidery pattern which is the calculated combined movement amount (Ln), the main shaft 8 (sewing needle 8a) is moved up and down by one stitch. The rotation speed (rotation speed) of the motor 5 can be set, and the needle bar speed at which the needle bar 8 moves up and down can be set according to the setting. Therefore, stitches having the same stitch width for one stitch can be formed at the same needle bar speed at which the rotation speed (rotational speed) of the spindle motor 5 is the same.

  That is, as shown in FIG. 6, when the seam having a constant stitch width is continuously formed and an arcuate embroidery pattern is sewn and formed, the direction of the seam and the composite direction in which the holding frame 10 moves Even when a plurality of stitches having different stitches are formed, all the stitches have the same rotational speed (rotational speed) of the spindle motor 5 and can be formed at the same needle bar speed. The stitching texture is stable and an overall embroidery pattern can be formed.

  Therefore, it can be said that the sewing machine 1 is a sewing machine that can form a stable embroidery pattern and perform stable embroidery.

(Embodiment 2)
Next, a second embodiment of the sewing machine 1 according to the present invention will be described. In addition, about the structure similar to Embodiment 1, the same code | symbol is attached | subjected and description is abbreviate | omitted and only a different part is demonstrated.

In the ROM 102 of the control unit 100, a spindle motor for the CPU 101 (control unit 100) to adjust the rotation of the spindle motor 5 and to adjust the speed at which the spindle motor 5 as needle bar driving means moves the needle bar 8 up and down. An angle rotation speed setting table in which the rotation speed of 5 and the movement angle at which the holding frame 10 moves is associated is stored.
In particular, a first angle rotation speed setting table in which the rotation speed (rotation speed) of the spindle motor 5 is slow, and a second angle rotation speed setting table in which the rotation speed (rotation speed) of the spindle motor 5 is higher. Is stored.

  The control unit performs control for selecting and acquiring embroidery pattern data corresponding to a specified embroidery pattern input by a touch panel operation on the display unit 7 as embroidery pattern data acquisition means.

Further, the control unit 100 serves as a movement angle calculation unit based on the movement amount data of the embroidery pattern data acquired by the embroidery pattern data acquisition unit (control unit 100). Control is performed to calculate a movement angle (θ = tan ⁻¹ (Yn / Xn)) in the combined direction, which is a direction obtained by combining the X-axis direction and the Y-axis direction, which is moved by the motor 12.
For example, when the moving amount data of the holding frame 10 from the origin O (moving amount in the X-axis direction; moving amount in the Xn and Y-axis directions; Yn) is (2, 2√3)), the moving direction data is moved. The movement angle of θ = tan ⁻¹ (2√3 / 2) = 60 ° and (the movement amount in the X-axis direction; the movement amount in the Xn and Y-axis directions; Yn) is (2, 2). In this case, the movement angle in the synthesis direction is θ = tan ⁻¹ (2/2) = 45 °, and (the movement amount in the X-axis direction; Xn, the movement amount in the Y-axis direction; Yn) is (2√ 3, 2)), the moving angle in the composition direction is θ = tan ⁻¹ (2 / 2√3) = 30 °, and (the amount of movement in the X-axis direction; Xn, in the Y-axis direction) When the movement amount; Yn) is (2, 0), the movement angle in the synthesis direction is calculated such that θ = tan ⁻¹ (0/2) = 0 ° as the movement angle in the synthesis direction. .

  Further, the control unit 100 sets an angle rotation speed setting table corresponding to the movement angle in the composition direction calculated by the movement angle calculation unit (control unit 100) as the needle bar speed setting unit, and for the angle. The movement amount in the X-axis direction and the movement amount in the Y-axis direction in the movement amount data (Xn, Yn) of the embroidery pattern data acquired by the embroidery pattern data acquisition means (control unit 100) based on the rotation speed setting table. The spindle motor 5 (needle bar drive means) performs control to set the needle bar speed for moving the needle bar 8 up and down so as to correspond to the larger movement amount.

For example, the control unit 100 serving as a needle bar speed setting unit includes a first angular rotation speed stored in the ROM 102 in accordance with the movement angle in the synthesis direction calculated by the movement angle calculation unit (control unit 100). After setting the rotation speed setting table for one of the setting table and the second rotation speed setting table for the angle, the movement amount data of the embroidery pattern data acquired by the embroidery pattern data acquisition means (control unit 100) ( Xn, Yn), the spindle motor 5 (needle bar driving means) moves the needle bar 8 up and down so as to correspond to the larger one of the movement amount in the X-axis direction and the movement amount in the Y-axis direction. Control to set the needle bar speed to be performed.
For example, the first angle rotation speed setting table corresponds to ranges in which the movement angle calculated by the movement angle calculation means (control unit 100) is 0 ° to 30 ° and 60 ° to 90 °. The second angle rotation speed setting table corresponds to a range in which the movement angle is greater than 30 ° and less than 60 °.
When the movement angle calculated by the movement angle calculation means (control unit 100) is in the range of 0 ° to 30 ° and 60 ° to 90 ° (in the angle range on the side close to the X axis and the Y axis). In some cases, when the movement angle calculated by the movement angle calculation means (control unit 100) is in the range of more than 30 ° and less than 60 ° (the angle range on the side away from both the X axis and the Y axis). The amount of movement in the X-axis direction and the Y-axis direction in which the holding frame 10 actually moves is large even if the stitch length for one stitch (the combined movement amount that is the sewing width) is the same. (Long), the first rotational speed setting table for the angle is set so that the rotational speed (rotational speed) of the spindle motor 5 is slower, and the second rotational speed setting table for the angle is set faster than that. The rotation speed (number of rotations) is set.

  Next, the operation of the sewing machine 1 according to the first embodiment, particularly the processing operation for setting the rotation speed and the rotation speed of the spindle motor 5 based on the embroidery pattern data will be described with reference to the flowchart shown in FIG.

First, in a state where the main power supply of the sewing machine 1 is turned on, the control unit 100 selects and acquires the embroidery pattern data corresponding to the designated embroidery pattern from the ROM 102, which is input by the touch panel operation of the display unit 7 (step 100). S201).
Next, the control unit 100 combines the X axis direction and the Y axis direction in which the holding frame 10 is moved by the X drive stepping motor 11 and the Y drive stepping motor 12 based on the movement amount data in the acquired embroidery pattern data. The movement angle (θ) in the synthesis direction to the direction thus calculated is calculated (step S202).

Next, the control unit 100 sets an angle rotation speed setting table corresponding to the calculated movement angle (θ) (step S203).
When the calculated movement angle (θ) is in the range of 0 ° or more and 30 ° or less and 60 ° or more and 90 ° or less and is in the angle range close to the X axis and the Y axis (step S203; Yes), step S204. After setting the first rotation speed setting table for angle, the process proceeds to step S206. On the other hand, when the calculated movement angle (θ) is in the range of more than 30 ° and less than 60 °, and the angle range on the side away from both the X axis and the Y axis (step S203; No), the process proceeds to step S205. The process advances to step S206 after setting the second angle rotation speed setting table.

Next, the control unit 100 moves in the X-axis direction (Xn) in the movement amount data (Xn, Yn) of the embroidery pattern data acquired by the embroidery pattern data acquisition unit (control unit 100) and in the Y-axis direction. Is compared with the amount of movement (Yn) (step S206).
When the control unit 100 determines that the absolute value of Xn is larger than the absolute value of Yn (step S206; Yes), the process proceeds to step S207, where the first angular rotation speed setting table set in steps S204 to S205 or the first Based on the angle rotation speed setting table of 2, the rotation speed (rotation speed) of the spindle motor 5 corresponding to Xn is set (step S207).
On the other hand, when the control unit 100 determines that the absolute value of Xn is smaller than the absolute value of Yn (step S206; No), the process proceeds to step S208, and the first rotational speed setting table for angle set in steps S204 to S205. Alternatively, based on the second rotational speed setting table for angle, the rotational speed (rotational speed) of the spindle motor 5 corresponding to Yn is set (step S207).
The control unit 100 adjusts the needle bar according to the set rotation speed (rotational speed) of the spindle motor 5 in accordance with the timing of moving the holding frame 10 by one needle based on the movement amount data in the acquired embroidery pattern data. 8 is moved up and down by one stitch to form a stitch for one stitch of the embroidery pattern (step S209).

Next, the control unit 100 determines whether there is next movement amount data in the acquired embroidery pattern data (step S210).
When the control unit 100 determines that there is the next movement amount data (step S210; Yes), the process returns to step S202 and is repeated to form the next stitch.
On the other hand, when the control unit 100 determines that there is no next movement amount data (step S210; No), the sewing (seam) in the acquired embroidery pattern data is finished, the embroidery pattern is completed, and the spindle motor 5 is stopped. (Step S211), the sewing is finished.

As described above, the sewing machine 1 according to the present invention includes the X-axis direction in which the holding frame 10 is moved in the X-axis direction by the X drive stepping motor 11 based on the movement amount data of the embroidery pattern data, and the Y drive stepping motor 12. In order to form the seam in the embroidery pattern by calculating the movement angle (θ) in the composite direction, which is the movement direction obtained by combining the Y-axis direction moved in the Y-axis direction by The angle at which the holding frame 10 moves can be divided. For example, the division is a division of a range on the side close to the X axis and the Y axis and a range on the side away from both the X axis and the Y axis. Specifically, for example, an X axis that is in the range of 0 ° to 30 ° and 60 ° to 90 °, a range on the side close to the Y axis, and an X axis that is greater than 30 ° and less than 60 ° The area is separated from the Y axis in the range away from the Y axis.
Then, the rotational speed (rotational speed) of the spindle motor 5 is moved so that the needle bar 8 (sewing needle 8a) is moved up and down by one stitch according to the range of movement angles divided by the calculated movement angle (θ) of the stitch. And the needle bar speed at which the needle bar 8 moves up and down can be set. Therefore, in the range close to the X axis and the Y axis, and in the range where the movement amount of the holding frame 10 is large, the rotational speed of the spindle motor 5 (so that the needle bar speed at which the needle bar 8 moves is slow ( The speed of the needle bar 8 moves faster in a range where both the X-axis and the Y-axis are set apart and the movement amount of the holding frame 10 is small. Thus, the rotational speed (rotational speed) of the spindle motor 5 can be set faster.

That is, as shown in FIG. 6, when the seam having a constant stitch width is continuously formed and an arcuate embroidery pattern is sewn and formed, the holding frame 10 is moved in the X-axis direction as in the conventional technique. The amount of movement (Xn) and the amount of movement (Yn) in the Y-axis direction are compared, and the spindle motor according to the value with the larger amount of movement (absolute value of the amount of movement) (longer moving distance) Even if the rotational speed of 5 is determined, the needle bar speed at which the needle bar 8 moves is slow in the range close to the X axis and the Y axis, and in the range where the movement amount of the holding frame 10 is large. As a matter of course, the rotational speed (the number of rotations) of the spindle motor 5 can be set slower, and is the range on the side away from both the X axis and the Y axis, and the amount of movement of the holding frame 10 In a small range, the rotational speed (number of rotations) of the spindle motor 5 is increased so that the needle bar speed at which the needle bar 8 moves becomes faster. It can be set to. As described above, the angle range is close to the X axis and the Y axis and the moving amount of the holding frame 10 is large, and the angle range is the side away from both the X axis and the Y axis and the moving amount of the holding frame 10 is. The rotational speed (number of rotations) of the spindle motor 5 that moves the needle bar 8 up and down in a small range is the amount of movement of the holding frame 10 (the amount of movement in the X-axis direction (Xn) or the Y-axis direction) The rotation speed (number of rotations) corresponding to the movement amount (Yn) having the larger absolute value) can be set.
Therefore, the rotation speed (rotation speed) of the spindle motor 5 according to the movement amount of the holding frame 10 and the needle bar speed at which the needle bar 8 moves can be suitably set. Each stitch is a suitable rotational speed (rotational speed) of the spindle motor 5 every time it is divided by the range of the movement angle, and can be formed by the needle bar speed at which the needle bar 8 moves. In the raised embroidery pattern, the stitched texture is stable, and an overall embroidery pattern can be formed.

  Therefore, it can be said that the sewing machine 1 is a sewing machine that can form a stable embroidery pattern and perform stable embroidery.

  In the embodiment described above, the rotation speed (rotation speed) of the spindle motor 5 is set every time one stitch for forming the embroidery pattern is formed. The embroidery pattern may be formed after setting the rotation speed (number of rotations) of the spindle motor 5 when forming all the seams forming the embroidery pattern.

  Further, the angle for dividing the first rotational speed setting table for the angle and the second rotational speed setting table for the angle may be an arbitrary angle, and the rotational speed setting table for the angle may be three or more. The angle may be divided more finely.

  Further, the moving direction of the holding frame 10 is not limited to the X-axis direction and the Y-axis direction, and any direction may be used as long as the direction is perpendicular to the direction in which the needle bar 8 (sewing needle 8a) moves up and down. Such a direction may be used, and the synthesis direction may be obtained by a vector sum.

  In addition, it is needless to say that other specific detailed structures can be appropriately changed.

It is a perspective view which shows the sewing machine which concerns on this invention. It is a block diagram which shows the principal part structure of the sewing machine which concerns on this invention. It is explanatory drawing regarding embroidery pattern data. It is a flowchart which shows the processing operation for setting the rotation speed of the spindle motor of the sewing machine which concerns on this invention. It is a flowchart which shows the processing operation for setting the rotation speed of the spindle motor of the sewing machine which concerns on this invention. It is explanatory drawing which shows the relationship between the sewing width for one stitch in an embroidery pattern, and the movement amount of an embroidery frame (holding frame).

Explanation of symbols

1 Electronic embroidery sewing machine (sewing machine)
2 Sewing machine frame 5 Spindle motor (needle bar drive means)
7 Display section 8 Needle bar 8a Sewing needle 10 Holding frame 11 X drive stepping motor (first holding frame driving means)
12 Y drive stepping motor (second holding frame driving means)
100 control unit (embroidery pattern data acquisition means, movement amount calculation means, movement angle calculation means, needle bar speed setting means)
101 CPU
102 ROM (storage means)
103 RAM

Claims (2)

Needle bar driving means for moving the needle bar holding the sewing needle up and down;
A holding frame that holds a workpiece and is movable in a direction perpendicular to the vertical movement direction of the needle bar;
First holding frame driving means for moving the holding frame in one direction relative to the needle bar;
Second holding frame driving means for moving the holding frame in another direction with respect to the needle bar;
A first holding frame driving means for moving the holding frame so as to form a predetermined embroidery pattern moves in the one direction in which the holding frame is moved, and the second holding frame driving means. Storage means for storing embroidery pattern data combining a plurality of movement amount data corresponding to the movement amount in the other direction for moving the holding frame;
Embroidery pattern data acquisition means for acquiring the embroidery pattern data from the storage means;
Based on the movement amount in the one direction and the movement amount in the other direction in the movement amount data of the embroidery pattern data acquired by the embroidery pattern data acquisition unit, the first holding frame driving unit; A moving amount calculating means for calculating a combined moving amount in a combining direction obtained by combining the one direction in which the holding frame is moved and the other direction by the second holding frame driving unit;
Needle bar speed setting means for setting a needle bar speed at which the needle bar driving means moves the needle bar up and down based on the combined movement amount in the combined direction calculated by the movement amount calculating means,
When the first holding frame driving unit and the second holding frame driving unit move the holding frame based on the movement amount data of the embroidery pattern data acquired by the embroidery pattern data acquiring unit, The sewing machine according to claim 1, wherein the needle bar driving means moves the needle bar up and down at a needle bar speed set by the needle bar speed setting means. Needle bar driving means for moving the needle bar holding the sewing needle up and down;
A holding frame that holds a workpiece and is movable in a direction perpendicular to the vertical movement direction of the needle bar;
First holding frame driving means for moving the holding frame in one direction relative to the needle bar;
Second holding frame driving means for moving the holding frame in another direction with respect to the needle bar;
A first holding frame driving means for moving the holding frame so as to form a predetermined embroidery pattern moves in the one direction in which the holding frame is moved, and the second holding frame driving means. Storage means for storing embroidery pattern data combining a plurality of movement amount data corresponding to the movement amount in the other direction for moving the holding frame;
Embroidery pattern data acquisition means for acquiring the embroidery pattern data from the storage means;
Based on the movement amount in the one direction and the movement amount in the other direction in the movement amount data of the embroidery pattern data acquired by the embroidery pattern data acquisition unit, the first holding frame driving unit; A movement angle calculation means for calculating a movement angle in a combined direction obtained by combining the one direction in which the holding frame is moved and the other direction by the second holding frame driving means;
Needle bar speed setting means for setting a needle bar speed at which the needle bar drive means moves the needle bar up and down according to the movement angle in the combined direction calculated by the movement angle calculation means,
When the first holding frame driving unit and the second holding frame driving unit move the holding frame based on the movement amount data of the embroidery pattern data acquired by the embroidery pattern data acquiring unit, The sewing machine according to claim 1, wherein the needle bar driving means moves the needle bar up and down at a needle bar speed set by the needle bar speed setting means.

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