CN108796850B - Sewing machine - Google Patents
Sewing machine Download PDFInfo
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- CN108796850B CN108796850B CN201810402241.7A CN201810402241A CN108796850B CN 108796850 B CN108796850 B CN 108796850B CN 201810402241 A CN201810402241 A CN 201810402241A CN 108796850 B CN108796850 B CN 108796850B
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- Prior art keywords
- sewing machine
- needle
- sewing
- axis angle
- adjustment
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- D—TEXTILES; PAPER
- D05—SEWING; EMBROIDERING; TUFTING
- D05B—SEWING
- D05B55/00—Needle holders; Needle bars
- D05B55/14—Needle-bar drives
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- D—TEXTILES; PAPER
- D05—SEWING; EMBROIDERING; TUFTING
- D05B—SEWING
- D05B19/00—Programme-controlled sewing machines
- D05B19/02—Sewing machines having electronic memory or microprocessor control unit
- D05B19/12—Sewing machines having electronic memory or microprocessor control unit characterised by control of operation of machine
Abstract
The appropriate vertical movement of the sewing needle is performed by using the jog dial. The sewing machine comprises: a needle up-down moving mechanism which moves up and down a needle bar holding a needle from a sewing machine motor through an upper shaft; and a control device for controlling the rotation of the upper shaft by the motor of the sewing machine, wherein the sewing machine is provided with a jog dial for adjusting the upper shaft angle of the upper shaft by driving the motor of the sewing machine through the rotation operation, the control device performs control such that a part of the range of the upper shaft angle is set as a first adjustment zone for driving the motor of the sewing machine with a predetermined resolution relative to the rotation operation of the jog dial, and a part or all of the angle range outside the first adjustment zone is set as a second adjustment zone for driving the motor of the sewing machine through an operation different from the first adjustment zone.
Description
Technical Field
The present invention relates to a sewing machine which properly adjusts the position of a sewing needle.
Background
A sewing machine generally has a pulley coupled to an upper shaft on the outside of a sewing machine frame, and the sewing needle can be moved up and down by rotating the pulley (see, for example, patent document 1).
Therefore, during operations such as positioning of the needle drop position, the height of the sewing needle is adjusted by carefully applying a rotational operation to the pulley.
In addition, in the case of sewing with a hand sewing feeling, trial sewing, or the like, a method of using a pulley in which sewing corresponding to a plurality of stitches is performed by applying a plurality of rotation operations is performed.
Patent document 1: japanese patent laid-open publication No. 2013-252162
Because of a large work load on the rotation operation of the pulley, there is a demand for the vertical movement of the sewing needle by the motor drive using the dial type input device.
However, in the case where a careful operation is desired, such as positioning of a needle drop position, it is desirable that the vertical movement amount of the needle is small with respect to the rotational operation amount of the Jog dial (Jog dial), and in the case where a sewing operation of a plurality of needles such as trial sewing is performed, it is necessary to smoothly and quickly move the needle up and down with respect to the rotational operation of the Jog dial.
Therefore, it is difficult to uniformly determine the vertical movement amount of the needle corresponding to the rotation operation of the jog dial.
Disclosure of Invention
The invention aims to provide a sewing machine which can perform appropriate vertical movement of a sewing needle by using a jog dial.
The invention described in claim 1 is a sewing machine,
it has the following components:
a needle up-down moving mechanism for moving up and down a needle bar holding a needle from a sewing machine motor through an upper shaft; and
a control device for controlling the rotation of the upper shaft by the sewing machine motor,
the sewing machine is characterized in that the sewing machine is provided with a sewing machine,
has a rotary operating member for adjusting the upper shaft angle of the upper shaft by driving the sewing machine motor through a rotary operation,
the control device performs control such that,
a range of a part of the upper axis angle is set as a first adjustment range for driving the sewing machine motor with a predetermined resolution relative to the rotating operation of the rotating operation tool,
and setting a part or all of the upper shaft angle range outside the first adjustment range as a second adjustment range for driving the sewing machine motor by a different action from the first adjustment range.
The invention described in claim 2 is characterized in that, in the sewing machine described in claim 1,
the control device performs control to drive the sewing machine motor until reaching an upper axis angle at the beginning of the first adjustment section regardless of an operation amount if a rotation operation of the rotation operation member is input in the second adjustment section.
The invention described in claim 3 is characterized in that, in the sewing machine described in claim 2,
the upper axis angle range of the first adjustment section is set to an upper axis angle range from an upper axis angle at which the sewing needle is at an upper stop position to an upper axis angle at which the sewing needle is at a lower stop position,
the upper stop position is a position at which the sewing needle descends halfway through the top dead center, and is an upper shaft angle at which the sewing needle is located above the needle plate.
The invention described in claim 4 is characterized in that, in the sewing machine described in claim 1,
the control device performs control for driving the sewing machine motor at a resolution lower than the first adjustment range with respect to the rotational operation of the rotational operation tool in the second adjustment range.
The invention described in claim 5 is characterized in that, in the sewing machine described in claim 4,
the upper axis angle range of the first adjustment interval is set to,
the range of the upper axis angle from a position at which the sewing needle descends halfway through the top dead center and the sewing needle is above the needle plate to a position at which the sewing needle is below the needle plate and the sewing needle is before the bottom dead center.
The invention described in claim 6 is characterized in that, in the sewing machine described in any one of claims 1 to 5,
the adjustment device is provided with a setting part which arbitrarily sets the upper axis angle range of the first adjustment section.
The invention described in claim 7 is the sewing machine described in any one of claims 1 to 6,
the upper axis angle range of the first adjustment section is set to a range including the upper axis angle of the sewing needle penetrating into the sewed object or the needle plate.
The invention described in claim 8 is characterized in that, in the sewing machine described in any one of claims 1 to 7,
the rotary operating member is a jog dial.
ADVANTAGEOUS EFFECTS OF INVENTION
As described above, according to the present invention, it is possible to provide a sewing machine capable of performing an appropriate vertical movement operation of a sewing needle using a jog dial.
Drawings
Fig. 1 is a perspective view showing the overall structure of a sewing machine for sewing a lockstitch according to the present embodiment.
Fig. 2 is a block diagram showing a control system of the sewing machine.
Fig. 3 is an explanatory diagram illustrating the concept of the upper axis angle control (1) according to the rotation operation of the jog dial.
Fig. 4 is an explanatory diagram illustrating the concept of the upper axis angle control (2) according to the rotation operation of the jog dial.
Fig. 5 is a diagram showing a relationship between the rotation operation amount of the jog dial and the upper axis angle in the upper axis angle control (2) corresponding to the rotation operation of the jog dial.
Fig. 6 is a flowchart showing the upper axis angle control (1) according to the rotation operation of the jog dial.
Fig. 7 is a flowchart showing the upper axis angle control (2) according to the rotation operation of the jog dial.
Description of the reference numerals
2 Sewing machine frame
5 Sewing machine motor
10 Sewing machine
11 stitch
12-needle bar
15 rotating belt wheel
22 Upper shaft
32 inching turntable (rotating operation parts)
33 operating panel (setting part)
51 encoder
100 control device
K1 first control interval
K2 second control interval
Detailed Description
[ Sewing machine outline ]
Embodiments of the present invention will be described in detail below with reference to the drawings. Fig. 1 is a perspective view showing the overall structure of a sewing machine 10 according to the present embodiment. In the following description, a horizontal direction parallel to a longitudinal direction of a sewing machine arm portion 2a described later is referred to as a Y-axis direction (left-right direction), a horizontal direction orthogonal to the Y-axis direction is referred to as an X-axis direction (front-rear direction), and a vertical up-down direction is referred to as a Z-axis direction (up-down direction).
As shown in fig. 1, a sewing machine 10 is a so-called sewing machine for a flat seam, and includes: a sewing machine frame 2 which supports the entire structure; a needle up-down moving mechanism (not shown) for moving up and down a needle bar 12 holding a needle 11; a sewing machine motor 5 serving as a driving source for moving the needle bar 12 up and down; and a control device 100 for controlling the operation of the sewing machine motor 5.
Further, reference numeral 14 in fig. 1 is a wire adjuster that gives a wire tension to the upper wire. It is to be noted that, although there are a thread take-up lever mechanism, a pot mechanism, a cloth feed mechanism, and the like, which are generally mounted on a sewing machine for sewing a flat seam, these mechanisms are the same as those of the conventionally known structures, and therefore, the description thereof is omitted.
[ Sewing machine frame ]
The sewing machine frame 2 has an approximately コ -shaped external shape in a front view. The sewing machine frame 2 has: a sewing machine arm 2a which constitutes an upper part of the sewing machine frame 2 and extends in the left-right direction; a sewing machine base 2b which constitutes a lower part of the sewing machine frame 2 and extends in the left-right direction; and a vertical body 2c connecting the sewing machine arm 2a and the sewing machine base 2 b.
[ Up-and-down moving mechanism of sewing needle ]
The arm 2a of the sewing machine is provided with a needle vertical moving mechanism. The needle up-and-down moving mechanism comprises: a sewing machine motor 5 (see fig. 2) serving as a drive source; an upper shaft 22 that is rotationally driven by the sewing machine motor 5; a needle bar 12 which holds the needle 11 at a lower end portion thereof and is supported by the arm portion 2a of the sewing machine so as to be movable up and down; and a crank mechanism (not shown) that converts rotation of the upper shaft 22 into reciprocating motion in the Z-axis direction.
Further, a rotating pulley 15 is fixedly provided at one end of the upper shaft 22, and the rotating pulley 15 can be operated by hand from the outside of the sewing machine frame 2.
A needle plate 13 is provided below the needle bar 12 and above the sewing machine base portion 2b, and the needle plate 13 is formed with a needle hole 13a into which the sewing needle 11 is inserted. A pot, not shown, is disposed below the needle plate 13.
Further, the cloth presser foot 17 is supported by the sewing machine arm 2a adjacent to the needle bar 12. The cloth presser foot 17 is supported so as to be movable up and down, presses a cloth as a material to be sewn on the needle plate 13 from above when it is lowered, and releases the cloth when it is raised.
[ control System of Sewing machine ]
Fig. 2 is a block diagram showing a control system of the sewing machine 10. As shown in fig. 2, the control device 100 of the sewing machine 10 includes: a CPU 101 that executes a control program for each part of the sewing machine; a work memory 102 serving as a work area for program processing; a data memory 103 for storing setting data and execution programs related to various controls; and a counter 104 that counts the pulse signal from the outside.
Further, the sewing machine motor 5 is connected to the control device 100 via a drive circuit 5 a.
Further, the control device 100 is connected with: an encoder 51 that detects an output shaft angle of the sewing machine motor 5; an operation panel 33 for an operator to perform various inputs related to the operation control of sewing; an operation pedal 34 as an operation portion for manually inputting an instruction to start sewing with respect to the control device 100; and a jog dial 32 as a rotation operation member for adjusting the upper shaft angle of the upper shaft 22 by driving the sewing machine motor 5 by a rotation operation.
The encoder 51 detects the shaft angle of the output shaft of the sewing machine motor 5, and inputs a pulse signal to the control device 100 in accordance with the amount of change in the shaft angle.
In the control device 100, the counter 104 counts the pulse signals from the encoder 51, and calculates the current upper axis angle from the count value.
The jog dial 32 can rotate in the clockwise direction and the counterclockwise direction without restriction, and a pulse is input to the control device 100 in proportion to the amount of the rotation angle. Further, the jog dial 32 is internally provided with a latch structure so as to generate a click feeling of 30 times of click within a range of 360 ° rotation in one rotation. That is, the operator obtains the click feeling of 1 click per 12 ° rotation when the jog dial 32 is rotated.
Further, if the jog dial 32 is rotated clockwise (set to be positive rotation), the control device 100 rotates the upper shaft 22 positively (in accordance with the rotation direction at the time of sewing) by the sewing machine motor 5, and if the jog dial 32 is rotated counterclockwise (set to be reverse rotation), the upper shaft 22 is rotated reversely by the sewing machine motor 5.
[ Upper shaft Angle control (1) corresponding to rotational operation of jog dial ]
The control device 100 selectively executes two kinds of controls of (1) and (2) of upper axis angle control corresponding to the rotation operation of the jog dial with respect to the sewing machine motor 5 that rotates the upper axis 22 with respect to the rotation operation of the jog dial 32. The selection of the upper axis angle controls (1) and (2) can be performed by manual selection input from the operation panel 33. Thereby, the operation panel 33 functions as a selection unit.
First, the upper axis angle control (1) corresponding to the rotation operation of the jog dial will be described with reference to fig. 3.
As shown in fig. 3, the control device 100 divides the range of one rotation (360 °) of the upper axis angle into two parts, i.e., a first adjustment section K1 and a second adjustment section K2, and performs different controls for the sewing machine motor 5 depending on which of the first adjustment section K1 and the second adjustment section K2 the current upper axis angle belongs to, and which of the forward rotation and the reverse rotation the jog dial 32 is operated.
In the present embodiment, the first adjustment interval K1 is set to a range from the upper stop position to immediately before the needle bar bottom dead center, and the second adjustment interval K2 is set to a range from the needle bar bottom dead center to immediately before the upper stop position.
The upper stop position is a position at which the sewing needle 11 descends while passing through the needle bar upper stop point which is the highest position, and is a position at which the sewing needle 11 is located above the needle plate 13. When the needle bar top dead center is set to 0 °, for example, the upper stop position is set to 70 °. The needle bar bottom dead center is set to 180 °. In the above example, the upper axis angle of the first adjustment section K1 is greater than or equal to 70 ° and less than 180 °, and the upper axis angle of the second adjustment section K2 is greater than or equal to 180 ° and less than 70 °. The first adjustment interval K1 may be set to a range including 180 ° which is the needle-rod bottom dead center, and the second adjustment interval K2 may be set to a range not including 180 ° which is the needle-rod bottom dead center.
When the forward rotation is input to the jog dial 32 and the current upper shaft angle is within the range of the first adjustment range K1, the control device 100 drives the sewing machine motor 5 to rotate the upper shaft 22 forward with a predetermined resolution determined for the first adjustment range K1 with respect to the rotational operation of the jog dial 32.
Further, the resolution indicates a ratio of the rotation angle of the sewing machine motor 5 to the rotation angle of the jog dial 32. In the case of the low resolution, the ratio of the rotation angle of the sewing machine motor 5 to the rotation angle of the jog dial 32 is large, and in the case of the high resolution, the ratio of the rotation angle of the sewing machine motor 5 to the rotation angle of the jog dial 32 is small.
The first adjustment section K1 is a section in which an operation of finely adjusting the height of the tip end of the sewing needle 11 is required, such as an adjustment operation of the needle drop position, and in the first adjustment section K1, the sewing machine motor 5 is driven at a high resolution.
The resolution at which the upper shaft 22 makes one rotation corresponding to two rotations of the jog dial 32 is set as an average resolution, the resolution higher than the average resolution is set as a high resolution, and the resolution lower than the average resolution is set as a low resolution.
The resolution of the first adjustment interval K1 can be set to an arbitrary value through the operation panel 33. In this case, the operation panel 33 functions as a "setting unit that arbitrarily sets the upper axis angle range of the first adjustment section".
When the normal rotation is input to the jog dial 32 and the current upper shaft angle is within the range of the second adjustment range K2, the control device 100 performs control to drive the sewing machine motor 5 so that the upper shaft 22 rotates normally until the upper shaft angle reaches the upper stop position, which is the start angle of the first adjustment range K1, regardless of the amount of the rotation operation of the jog dial 32.
The second adjustment interval K2 is an interval other than the first adjustment interval K1 suitable for adjustment work. The section is assigned to a case where the needle is lifted up after the needle is dropped, for example, in order to perform a trial sewing. That is, if the upper axis angle enters the second adjustment section K2, the needle 11 is automatically moved up and down to the upper stop position, and the needle can be moved without requiring the operator to perform the operation of rotating the jog dial 32.
When the counter rotation is input to the jog dial 32, the control device 100 drives the sewing machine motor 5 so that the upper shaft 22 is in the counter rotation at a predetermined resolution determined for the counter-rotation operation of the jog dial 32 regardless of which of the first adjustment section K1 and the second adjustment section K2 the current upper shaft angle belongs to.
Further, the resolution of the above-described reverse rotation may be high resolution, low resolution, or average resolution, and may be any value that can be set by the operation panel 33.
The resolution of the reverse rotation of the jog dial 32 may be changed depending on which range of the first adjustment section K1 and the second adjustment section K2 the upper axis angle is in.
[ Upper shaft Angle control (2) corresponding to the rotation operation of the jog dial ]
Next, the upper axis angle control (2) corresponding to the rotation operation of the jog dial will be described with reference to fig. 4.
In the present embodiment, the first adjustment interval K1 is set to a range from a position immediately before the needle 11 passes through the top dead center and descends to penetrate the workpiece to a position below the needle plate of the needle 11 and immediately before the bottom dead center, and a range other than the first adjustment interval is set to the second adjustment interval K2.
When the needle bar top dead center is set to 0 °, the upper axis angle at a position immediately before the needle pierces the workpiece is set to 80 °, for example. The upper axis angle of the needle at a position lower than the needle plate is, for example, 120 °.
Therefore, in the above example, the upper axis angle of the first adjustment section K1 is greater than or equal to 80 ° and less than 120 °, and the upper axis angle of the second adjustment section K2 is greater than or equal to 120 ° and less than 80 °.
As shown in fig. 4, when the control device 100 executes the upper axis angle control (2), if a positive rotation is input to the jog dial 32 and the current upper axis angle is within the range of the first adjustment section K1, the control device drives the sewing machine motor 5 to rotate the upper axis 22 in the positive direction at a predetermined resolution determined for the first adjustment section K1 with respect to the rotating operation of the jog dial 32. That is, when the positive rotation is input to the jog dial 32 and the upper shaft 22 is in the first adjustment interval K1, the same control as the upper shaft angle control (1) is executed.
The resolution of the first adjustment section K1 in the upper axis angle control (2) may be the same as that in the upper axis angle control (1), or may be set independently of the upper axis angle control (1). Further, the operation panel 33 may be set to an arbitrary numerical value independent of the upper axis angle control (1).
Further, the control device 100 performs control to drive the sewing machine motor 5 at a lower resolution than the first adjustment section K1 with respect to the rotational operation of the jog dial 32 when the forward rotation is input to the jog dial 32 and the current upper axis angle is within the range of the second adjustment section K2.
As described above, the second adjustment section K2 is a section other than the first adjustment section K1 suitable for the adjustment work, and is assigned to the case where the needle is lifted up after the needle is dropped in order to perform the trial sewing or the like. Therefore, if the upper shaft 22 enters the second adjustment section K2, the upper shaft 22 is rotated by driving the sewing machine motor 5 at a low resolution, and needle feed can be performed quickly.
Fig. 5 is a line graph showing the resolutions of the first adjustment section K1 and the second adjustment section K2 in the upper axis angle control (2), the solid line L1 showing the resolution in the upper axis angle control (2), and the broken line L2 showing the constant average resolution (comparative example).
In the upper axis angle control (2), if the jog dial 32 is rotated two times (60 times of click), the resolution changes halfway, but the upper axis 22 is rotated one time (360 °) in total. As shown in the figure, in the range of the upper shaft angle of the first adjustment interval K1(80 ° to 120 °), when the normal rotation is input to the jog dial 32, the upper shaft 22 is rotated at a high resolution of 2 ° corresponding to 1 time of latching of the jog dial 32, and the upper shaft 22 is rotated by driving the sewing machine motor 5.
In addition, in the range of the upper shaft angle being the second adjustment interval K2 (120-80 °), when the normal rotation is input to the jog dial 32, the upper shaft 22 is rotated at a low resolution of 8 ° corresponding to 1 time of latching of the jog dial 32, and the upper shaft 22 is rotated by driving the sewing machine motor 5.
In addition, in the comparative example, the sewing machine motor 5 was driven in the range of 0 to 360 ° with an average resolution of 6 ° of rotation of the upper shaft 22 corresponding to 1 latch over the entire range of two rotations (60 latches) of the click dial 32.
When the reverse rotation is input to the jog dial 32, the control device 100 drives the sewing machine motor 5 in the reverse rotation at a predetermined resolution determined for the reverse rotation operation of the jog dial 32 regardless of the current upper axis angle.
In this case, the resolution of the reverse rotation may be high resolution or low resolution, and may be set to an arbitrary value by the operation panel 33.
In addition, the resolution of the reverse rotation of the jog dial 32 may be changed depending on which range of the first adjustment section K1 and the second adjustment section K2 the upper axis angle is in.
[ adjustment action by Upper Axis Angle control (1) ]
The adjustment operation by the upper axis angle control (1) of the control device 100 will be described based on the flowchart of fig. 6.
If the upper axis angle control (1) is selected by the operation panel 33, the control device 100 is in a state of monitoring the rotation operation of the jog dial 32 except during the sewing operation by stepping on the operation pedal 34, and determines whether or not the input of the positive rotation of the jog dial 32 is inputted (step S1).
Then, if the input of the normal rotation of the jog dial 32 is detected (YES in step S1), the control device 100 calculates the current upper axis angle with reference to the output of the encoder 51 of the sewing machine motor 5, and determines whether or not the upper axis angle is within the first adjustment section K1 (step S3).
As a result, when the upper axis angle is within the first adjustment section K1 (YES in step S3), the sewing machine motor 5 is driven to rotate in the forward direction at the predetermined high resolution determined for the first adjustment section K1 with respect to the rotation operation of the jog dial 32 (step S5), and the process is ended. When the upper axis angle is not in the first adjustment section K1 but in the second adjustment section K2 (step S3: NO), the sewing machine motor 5 is driven to rotate in the normal direction until the upper axis angle becomes the upper stop position, which is the start angle of the first adjustment section K1, regardless of the rotation operation amount of the jog dial 32 (step S7), and the process is ended.
If the input of the normal rotation of the jog dial 32 is not detected in the determination of step S1 (step S1: NO), the control device 100 determines whether or not the input of the reverse rotation of the jog dial 32 is present (step S9).
Then, if the input of the reverse rotation of the jog dial 32 is detected (YES in step S9), the control device 100 drives the sewing machine motor 5 in the reverse rotation at a predetermined resolution determined for the reverse rotation of the rotation operation of the jog dial 32 (step S11), and ends the processing.
If the input of the reverse rotation of the jog dial 32 is not detected in the determination of step S9 (step S9: NO), the control device 100 concludes that NO rotation operation is performed on the jog dial 32 and ends the processing.
The upper axis angle control (1) is repeatedly executed at a predetermined cycle while the operating pedal 34 is not depressed.
[ adjustment action by Upper Axis Angle control (2) ]
The adjustment operation by the upper axis angle control (2) of the control device 100 will be described based on the flowchart of fig. 7.
If the upper axis angle control (2) is selected by the operation panel 33, the control device 100 is in a state of monitoring the rotation operation of the jog dial 32 except during the sewing operation by stepping on the operation pedal 34, and determines whether or not the input of the positive rotation of the jog dial 32 is inputted (step S21).
Then, if the input of the normal rotation of the jog dial 32 is detected (YES in step S21), the control device 100 calculates the current upper axis angle with reference to the output of the encoder 51 of the sewing machine motor 5, and determines whether or not the upper axis angle is within the first adjustment section K1 (step S23).
As a result, when the upper axis angle is within the first adjustment section K1 (YES in step S23), the sewing machine motor 5 is driven to rotate in the forward direction at the predetermined high resolution determined for the first adjustment section K1 with respect to the rotation operation of the jog dial 32 (step S25), and the process is ended.
When the upper axis angle is not in the first adjustment section K1 but in the second adjustment section K2 (step S23: NO), the sewing machine motor 5 is driven to rotate in the forward direction at a predetermined low resolution determined for the second adjustment section K2 with respect to the rotation operation of the jog dial 32 (step S27), and the process is ended.
If the input of the normal rotation of the jog dial 32 is not detected in the determination of step S1 (step S21: NO), the control device 100 determines whether or not the input of the reverse rotation of the jog dial 32 is present (step S29).
Then, if the input of the reverse rotation of the jog dial 32 is detected (YES in step S29), the control device 100 drives the sewing machine motor 5 in the reverse rotation at a predetermined resolution determined for the reverse rotation of the rotation operation of the jog dial 32 (step S31), and ends the processing.
If the input of the reverse rotation of the jog dial 32 is not detected in the determination of step S29 (step S29: NO), the control device 100 concludes that NO rotation operation is performed on the jog dial 32 and ends the processing.
The upper axis angle control (2) is repeatedly executed at a predetermined cycle even when the operating pedal 34 is not depressed.
[ technical effects of the embodiments ]
In the above-described sewing machine 10, the control device 100 performs control such that a part of the angular range of the upper shaft 22 is set as the first adjustment zone K1 for driving the sewing machine motor 5 at a predetermined resolution with respect to the rotational operation of the jog dial 32, and the angular range other than the first adjustment zone K1 is set as the second adjustment zone K2 for driving the sewing machine motor 5 by an operation different from the first adjustment zone K1.
Therefore, even when the jog dial 32 is used for different purposes such as adjustment work involving vertical movement of the sewing needle 11 and trial sewing, the appropriate vertical movement operation of the sewing needle 11 can be performed by using the jog dial 32 while driving the sewing machine motor 5 suitable for each purpose.
Further, the control device 100 performs the upper axis angle control (1) for driving the sewing machine motor 5 until the upper axis angle reaches the start of the first adjustment section K1 in the second adjustment section K2 regardless of the rotation operation of the jog dial 32, and therefore, the needle can be smoothly and quickly moved at the time of trial sewing or the like, and the workability can be improved. In addition, in the upper axis angle control (1), if the sewing machine enters the second adjustment section K2, the upper axis 22 is automatically rotated until the upper axis angle reaches the upper stop position, and therefore, the jog dial 32 does not need to be continuously rotated at the time of trial sewing, and the operation load can be reduced.
Further, in the second adjustment section K2, the control device 100 performs the upper axis angle control (2) for driving the sewing machine motor 5 at a resolution lower than that of the first adjustment section K1 with respect to the rotational operation of the jog dial 32, and therefore, in this case, the needle can be smoothly and quickly moved even at the time of trial sewing or the like, and the workability can be improved. In addition, the upper axis angle control (2) can arbitrarily stop the sewing machine motor 5 regardless of the adjustment section, and therefore, trial sewing can be performed while confirming the stitch formation state and the like.
In addition, in the case where the control device 100 is configured to include the operation panel 33 as the setting unit for arbitrarily setting the upper axis angle range of the first adjustment section K1 for the upper axis angle controls (1) and (2), the section to be performed with the adjustment operation involving the vertical movement of the sewing needle 11 can be optimized, and the optimization of the adjustment operation and the speedup of the trial sewing can be performed with good balance.
[ others ]
The ranges of the upper axis angles of the first adjustment section K1 and the second adjustment section K2 in the upper axis angle controls (1) and (2) described above may be arbitrarily changed by the operation panel 33, but the first adjustment section K1 is preferably set to a range including at least the angle by which the needle 11 penetrates into the workpiece or the needle plate 13 while the needle 11 descends while passing through the top dead center position of the needle bar which is the highest position. That is, the first adjustment section K1 preferably includes an upper shaft angle in a range of 80 to 100 °. This is because the front and rear of the range are often used for adjustment work involving vertical movement of the sewing needle 11.
The first adjustment interval K1 is not limited to the above range, and may include an upper axis angle passing through the bottom dead center of the needle bar in a range of 180 to 200 °. This is because the range of the upper axis angle of 190 ° is the upper axis angle from the point of the pot to the passing line of the sewing needle 11, and is often used for the pot alignment adjustment work.
The range of the upper axis angle of the first adjustment section K1 may be set arbitrarily in a range including either or both of the angle at which the sewing needle 11 penetrates into the workpiece or the needle plate 13 and the needle bar bottom dead center.
The angular range of the upper shaft 22 is divided into two parts, i.e., the first adjustment interval K1 and the second adjustment interval K2, but may be divided into more adjustment intervals, one of which is the first adjustment interval K1 and the other of which is the second adjustment interval K2. In this case, it is preferable that the sewing machine motor 5 be driven at a unique resolution different from both the first adjustment interval K1 and the second adjustment interval K2 with respect to the rotational operation of the jog dial 32 in an interval not belonging to either of the first adjustment interval K1 and the second adjustment interval K2.
In addition, the upper axis angle control (1) and (2) can be applied to all sewing machines regardless of the type of machine.
The attachment position of the jog dial 32 may be set at any position as long as it is within the reach of the operator. The installation place may be not only the sewing machine frame 2 but also a table for installing the sewing machine 10. In addition, the sewing machine 10 may be a remote control type.
Claims (8)
1. A sewing machine having:
a needle up-down moving mechanism for moving up and down a needle bar holding a needle from a sewing machine motor through an upper shaft; and
a control device for controlling the rotation of the upper shaft by the sewing machine motor,
the sewing machine is characterized in that the sewing machine is provided with a sewing machine,
has a rotary operating member for adjusting the upper shaft angle of the upper shaft by driving the sewing machine motor through a rotary operation,
the control device performs control such that,
a range of a part of the upper axis angle is set as a first adjustment range for driving the sewing machine motor with a predetermined resolution relative to the rotating operation of the rotating operation tool,
and setting a part or all of the upper shaft angle range outside the first adjustment range as a second adjustment range for driving the sewing machine motor by a different action from the first adjustment range.
2. The sewing machine of claim 1,
the control device performs control to drive the sewing machine motor until reaching an upper axis angle at the beginning of the first adjustment section regardless of an operation amount if a rotation operation of the rotation operation member is input in the second adjustment section.
3. The sewing machine of claim 2,
the upper axis angle range of the first adjustment section is set to an upper axis angle range from an upper axis angle at which the sewing needle is at an upper stop position to an upper axis angle at which the sewing needle is at a lower stop position,
the upper stop position is a position at which the sewing needle descends halfway through the top dead center, and is an upper shaft angle at which the sewing needle is located above the needle plate.
4. The sewing machine of claim 1,
the control device performs control for driving the sewing machine motor at a resolution lower than the first adjustment range with respect to the rotational operation of the rotational operation tool in the second adjustment range.
5. The sewing machine of claim 4,
the upper axis angle range of the first adjustment interval is set to,
the range of the upper axis angle from a position at which the sewing needle descends halfway through the top dead center and the sewing needle is above the needle plate to a position at which the sewing needle is below the needle plate and the sewing needle is before the bottom dead center.
6. Sewing machine as in any of claims 1 to 5,
the adjustment device is provided with a setting part which arbitrarily sets the upper axis angle range of the first adjustment section.
7. Sewing machine as in any of claims 1 to 6,
the upper axis angle range of the first adjustment section is set to a range including the upper axis angle of the sewing needle penetrating into the sewed object or the needle plate.
8. Sewing machine as in any of claims 1 to 7,
the rotary operating member is a jog dial.
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| Application Number | Priority Date | Filing Date | Title |
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| JP2017-089688 | 2017-04-28 | ||
| JP2017089688A JP2018186894A (en) | 2017-04-28 | 2017-04-28 | sewing machine |
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| CN108796850A CN108796850A (en) | 2018-11-13 |
| CN108796850B true CN108796850B (en) | 2022-03-08 |
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| CN201810402241.7A Active CN108796850B (en) | 2017-04-28 | 2018-04-28 | Sewing machine |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP2762681B2 (en) * | 1990-05-14 | 1998-06-04 | ブラザー工業株式会社 | Cylinder type sewing machine |
| JP2005328972A (en) * | 2004-05-19 | 2005-12-02 | Brother Ind Ltd | Device and method for controlling sewing machine motor |
| JP5318547B2 (en) * | 2008-12-04 | 2013-10-16 | Ｊｕｋｉ株式会社 | sewing machine |
| JP2010233827A (en) * | 2009-03-31 | 2010-10-21 | Juki Corp | Controller of sewing machine |
| CN102182022B (en) * | 2011-04-19 | 2013-01-09 | 贺欣机械厂股份有限公司 | Method and device for setting multi-point positioning of sewing action of sewing equipment |
| JP6108689B2 (en) * | 2012-06-05 | 2017-04-05 | Juki株式会社 | sewing machine |
| JP2017029226A (en) * | 2015-07-29 | 2017-02-09 | Juki株式会社 | Holing sewing machine |
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| CN108796850A (en) | 2018-11-13 |
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