JP2006158642A - Differential feed sewing machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To achieve a differential feed sewing machine for easily adjusting contraction amount and improving sewing quality. <P>SOLUTION: In the differential feed sewing machine 1, if a walking bar mechanism 3 moved by a walking bar moving means 17 is placed in a first movement position, both upper cloth and lower cloth are delivered by the amount of low feed by placing the upper cloth and the lower cloth between the walking bar mechanism 3 and a low feed mechanism 4 so as to interlock the walking bar mechanism 3 and the low feed mechanism 4. If the walking bar mechanism 3 moved by the walking bar moving means 17 is placed in a second movement position, the walking bar mechanism 3 is operated by slightly separating it from the low feed mechanism 4 so that only the upper cloth is delivered corresponding to a set value by a differential amount which is the delivered amount of one stitch (an upper feed amount) of the upper cloth exceeding a low feed amount. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a differential feed sewing machine that performs false sewing with different feed amounts of an upper cloth and a lower cloth.

2. Description of the Related Art Conventionally, a differential feed sewing machine that performs sewing while performing shirring (contraction) when performing sleeve fitting or the like is known (see, for example, Patent Documents 1 and 2).
Note that “inking” means, for example, an outer fabric (upper fabric, sleeve-side fabric) that is sewn in two layers when sewing a three-dimensional portion such as a shoulder of a sleeve of a clothes. ) Is made larger than the feed amount of the inner fabric (the lower fabric, the fabric on the body side), so that the outer fabric has a margin. By this intrusion, a predetermined three-dimensional shape is applied to the shoulders of the sleeves of the clothes. In addition, the squeeze is not necessarily applied uniformly over the entire series of sewing parts. It is common to sew with a reduced amount. In addition, the “weighing amount” indicates a difference in the feed amount between the upper cloth and the lower cloth per one stitch (first stitch, one pitch).

In this differential feed sewing machine, the lower feed section feeds the lower cloth with the stitch pitch amount (lower feed amount), and the upper feed section feeds the upper cloth with the upper feed amount obtained by adding the crease amount to the stitch pitch amount. The lower feed unit and the upper feed unit sandwich the lower fabric and the upper fabric and simultaneously feed them to give a predetermined bulge.
JP 7-299274 A JP 7-299275 A

  However, in the case of the above prior art, during sewing operation in the differential feed sewing machine, the operator pulls or feeds the cloth so as to finely adjust the squeeze amount according to the state of the work to be cut. Even if it is going to be done, since the lower cloth and the upper cloth were clamped by the lower feed part and the upper feed part, it was difficult to adjust by changing the amount of squeeze. For this reason, it is necessary to temporarily change the set amount of the squeeze amount set in advance by operating a predetermined key or the like, resulting in a problem that the efficiency of the sewing work is lowered.

  Further, since the lower cloth and the upper cloth are sandwiched between the lower feeding portion and the upper feeding portion and are fed at different feeding amounts, the lower cloth and the upper cloth are rubbed to generate friction therebetween. Depending on the degree of rubbing between the lower cloth and the upper cloth, there is a problem in that the cloth is damaged by feeding (scratching damage) and the quality of the sewing product is deteriorated.

  An object of the present invention is to provide a differential feed sewing machine capable of easily adjusting the amount of squeeze and improving the quality of a sewing product.

  In order to solve the above-mentioned problems, the invention according to claim 1 is a differential feed sewing machine, wherein the lower cloth and the upper cloth are stacked and placed on the needle plate, A lower feed mechanism section for feeding the cloth, an upper feed mechanism section for feeding the upper cloth, an upper feed moving means for moving the upper feed mechanism section relative to the lower feed mechanism section, and one needle for the lower feed mechanism section to feed the lower cloth The lower feed amount setting means for setting the lower feed amount per unit, the set value setting means for setting the set value for the upper feed mechanism section to feed the upper cloth, and the upper feed movement means, the upper feed mechanism section The upper feed mechanism portion and the lower feed mechanism portion are moved in the proximity of the mechanism portion and are in a first movement position that sandwiches the upper fabric and the lower fabric between the upper feed mechanism portion and the lower feed mechanism portion. Are linked together, and the upper and lower cloths are fed together by the lower feed amount by the interlock feed control means and the upper feed movement means. In the second movement position where the upper feed mechanism is slightly separated from the lower feed mechanism from the movement position, the upper feed mechanism is operated so that only the upper cloth is fed according to the set value. Differential amount feed control means for feeding by a differential amount which is a difference in which the feed amount per needle exceeds the lower feed amount.

  According to the first aspect of the present invention, in the differential feed sewing machine, when the upper feed mechanism portion moved by the upper feed moving means is disposed at the first movement position, the upper cloth and the lower cloth are the upper one. Since it is sandwiched between the feed mechanism portion and the lower feed mechanism portion, both the upper fabric and the lower fabric can be fed by the lower feed amount by interlocking the upper feed mechanism portion and the lower feed mechanism portion. Further, when the upper feed mechanism portion moved by the upper feed moving means is disposed at the second movement position, the upper feed mechanism portion is slightly separated from the lower feed mechanism portion. By operating, only the upper cloth can be sent in a differential amount that is a difference in which the feed amount per stitch to which the upper cloth is fed exceeds the lower feed amount in accordance with the set value.

  In other words, when the differential feed sewing machine feeds the upper cloth longer than the lower cloth by a differential amount, and the urging is performed, the upper feed mechanism is in the second movement position, and the lower cloth and the upper cloth are Since it is not clamped by the mechanism part and the upper feed mechanism part, the amount of squeezing can be reduced depending on the state of the work to be sewn (upper cloth, lower cloth) during the sewing operation of the differential feed sewing machine. As the operator adjusts, the upper cloth can be prevented from being fed by the upper feed mechanism by pulling the upper cloth. Therefore, the sewing can be performed so as to reduce the amount of squeeze by the amount that the upper cloth is prevented from being fed by the upper feed mechanism. Further, during the sewing operation of the differential feed sewing machine, the operator feeds the upper cloth so as to finely adjust the squeeze amount, so that the upper cloth is fed from the predetermined amount (upper feed amount) fed by the upper feed mechanism. You can send more (longer) cloth. Therefore, the sewing can be performed so as to increase the amount of squeeze as much as the upper cloth is fed beyond the upper feed mechanism.

In this way, the differential feed sewing machine performs the sew-in sewing so that the operator can easily fine-tune the squeeze amount according to the state of the work piece (upper cloth, lower cloth) being cut, etc. Therefore, it is not necessary to perform troublesome setting amount changing operations on the operation panel, etc., in order to temporarily change the preset setting amount (differential amount). be able to.
In addition, since the lower cloth and the upper cloth are not sandwiched between the lower feeding mechanism section and the upper feeding mechanism section when the squeezing is performed, the lower cloth and the upper cloth are not rubbed strongly. If the lower cloth and the upper cloth are not rubbed strongly, there will be no feed scratches on the cloth, and the quality of the sewn product will not be deteriorated.

  Therefore, the differential feed sewing machine according to the present invention can be said to be a differential feed sewing machine that can easily adjust the amount of squeeze and improve the quality of the sewing product.

  According to a second aspect of the present invention, in the differential feed sewing machine according to the first aspect, the set value setting means sets the upper feed amount per stitch that the upper feed mechanism portion feeds the upper cloth as the set value. A feed amount setting unit; and a differential amount calculation unit that calculates a differential amount that is a difference in which the upper feed amount set by the upper feed amount setting unit exceeds the lower feed amount.

  According to the second aspect of the present invention, the set value setting means of the differential feed sewing machine has the same effect as that of the first aspect of the invention, and the upper feed mechanism portion feeds the upper cloth as the set value. Differential amount for calculating a differential amount that is a difference in which the upper feed amount set by the upper feed amount setting means exceeds the lower feed amount. Calculation means are provided.

  That is, the differential amount calculating means may calculate a differential amount that is a difference in which the upper feed amount exceeds the lower feed amount in accordance with the upper feed amount that is a set value set by the upper feed amount setting means. Therefore, when the upper feed mechanism moved by the upper feed moving means is disposed at the second movement position, only the upper cloth can be fed by a differential amount by operating the upper feed mechanism. it can.

  Even with such a differential feed sewing machine, the amount of squeeze can be easily adjusted, and the quality of the sewing product can be improved.

  According to a third aspect of the present invention, in the differential feed sewing machine according to the first aspect, the set value setting means is a difference in which the feed amount per stitch to which the upper cloth is fed exceeds the lower feed amount as the set value. A differential amount setting means for setting a certain differential amount is provided.

  According to the third aspect of the present invention, the same effect as that of the first aspect of the invention can be obtained, and the set value setting means of the differential feed sewing machine can feed the upper cloth as a set value. Differential amount setting means for setting a differential amount that is a difference in which the amount exceeds the lower feed amount is provided.

  That is, since the differential amount that is the set value can be set by the differential amount setting means, when the upper feed mechanism portion moved by the upper feed moving means is arranged at the second movement position, By operating the feed mechanism, only the upper cloth can be fed in a differential amount.

  Even with such a differential feed sewing machine, the amount of squeeze can be easily adjusted, and the quality of the sewing product can be improved.

  According to a fourth aspect of the present invention, in the differential feed sewing machine according to the first aspect, the set value setting means sets, as the set value, a ratio value of the differential amount with respect to the lower feed amount set by the lower feed amount setting means. Based on the ratio value setting means to be set and the ratio value set by the ratio value setting means, a differential that calculates a differential amount that is a difference in which the feed amount per stitch to which the upper cloth is fed exceeds the lower feed amount And a quantity calculating means.

  According to the fourth aspect of the present invention, the same effect as that of the first aspect of the invention can be obtained, and the set value setting means of the differential feed sewing machine is the lower feed set by the lower feed amount setting means as the set value. Providing a ratio value setting means for setting a ratio value of the differential quantity with respect to the quantity, and further comprising a differential quantity calculating means for calculating the differential quantity based on the ratio value set by the ratio value setting means.

  That is, according to the ratio value that is the set value set by the ratio value setting means, the differential amount calculating means may calculate a differential amount that is a difference in which the upper cloth feed amount exceeds the lower feed amount. Therefore, when the upper feed mechanism moved by the upper feed moving means is disposed at the second movement position, only the upper cloth can be fed by a differential amount by operating the upper feed mechanism. it can.

  Even with such a differential feed sewing machine, the amount of squeeze can be easily adjusted, and the quality of the sewing product can be improved.

According to the first aspect of the present invention, in the differential feed sewing machine, when the upper feed mechanism portion moved by the upper feed moving means is disposed at the first movement position, the upper cloth and the lower cloth are the upper one. Since it is sandwiched between the feed mechanism portion and the lower feed mechanism portion, both the upper fabric and the lower fabric can be fed by the lower feed amount by interlocking the upper feed mechanism portion and the lower feed mechanism portion. Further, when the upper feed mechanism portion moved by the upper feed moving means is disposed at the second movement position, the upper feed mechanism portion is slightly separated from the lower feed mechanism portion. By operating, only the upper cloth can be sent in a differential amount that is a difference in which the feed amount per stitch to which the upper cloth is fed exceeds the lower feed amount in accordance with the set value. In other words, when the differential feed sewing machine feeds the upper cloth longer than the lower cloth by a differential amount, and the urging is performed, the upper feed mechanism is in the second movement position, and the lower cloth and the upper cloth are Since it is not clamped by the mechanism part and the upper feed mechanism part, the amount of squeezing can be reduced depending on the state of the work to be sewn (upper cloth, lower cloth) during the sewing operation of the differential feed sewing machine. As the operator adjusts, the upper cloth can be prevented from being fed by the upper feed mechanism by pulling the upper cloth. Therefore, the sewing can be performed so as to reduce the amount of squeeze by the amount that the upper cloth is prevented from being fed by the upper feed mechanism. Further, during the sewing operation of the differential feed sewing machine, the operator feeds the upper cloth so as to finely adjust the squeeze amount, so that the upper cloth is fed from the predetermined amount (upper feed amount) fed by the upper feed mechanism. You can send more (longer) cloth. Therefore, the sewing can be performed so as to increase the amount of squeeze as much as the upper cloth is fed beyond the upper feed mechanism.
In this way, the differential feed sewing machine performs the sew-in sewing so that the operator can easily fine-tune the squeeze amount according to the state of the work piece (upper cloth, lower cloth) being cut, etc. Therefore, it is not necessary to perform troublesome setting amount changing operations on the operation panel, etc., in order to temporarily change the preset setting amount (differential amount). be able to. In addition, since the lower cloth and the upper cloth are not sandwiched between the lower feeding mechanism section and the upper feeding mechanism section when the squeezing is performed, the lower cloth and the upper cloth are not rubbed strongly. If the lower cloth and the upper cloth are not rubbed strongly, there will be no feed scratches on the cloth, and the quality of the sewn product will not be deteriorated.
Therefore, it can be said that such a differential feed sewing machine is a differential feed sewing machine that can easily adjust the amount of squeeze and can improve the quality of the sewing product.

According to the second aspect of the present invention, the set value setting means of the differential feed sewing machine includes the upper feed amount setting means for setting the upper feed amount per stitch that the upper feed mechanism section feeds the upper cloth as the set value. In addition, there is provided differential amount calculating means for calculating a differential amount that is a difference in which the upper feed amount set by the upper feed amount setting means exceeds the lower feed amount. That is, the differential amount calculating means may calculate a differential amount that is a difference in which the upper feed amount exceeds the lower feed amount in accordance with the upper feed amount that is a set value set by the upper feed amount setting means. Therefore, when the upper feed mechanism moved by the upper feed moving means is disposed at the second movement position, only the upper cloth can be fed by a differential amount by operating the upper feed mechanism. it can.
Even with such a differential feed sewing machine, the amount of squeeze can be easily adjusted, and the quality of the sewing product can be improved.

According to the invention described in claim 3, the set value setting means of the differential feed sewing machine sets, as the set value, a differential amount that is a difference in which the feed amount per stitch to which the upper cloth is fed exceeds the lower feed amount. Differential amount setting means for setting is provided. That is, since the differential amount that is the set value can be set by the differential amount setting means, when the upper feed mechanism portion moved by the upper feed moving means is arranged at the second movement position, By operating the feed mechanism, only the upper cloth can be fed in a differential amount.
Even with such a differential feed sewing machine, the amount of squeeze can be easily adjusted, and the quality of the sewing product can be improved.

According to the invention described in claim 4, the set value setting means of the differential feed sewing machine sets the ratio value setting means for setting the ratio value of the differential amount with respect to the lower feed amount set by the lower feed amount setting means as the set value. And differential amount calculation means for calculating the differential amount based on the ratio value set by the ratio value setting means. That is, according to the ratio value that is the set value set by the ratio value setting means, the differential amount calculating means may calculate a differential amount that is a difference in which the upper cloth feed amount exceeds the lower feed amount. Therefore, when the upper feed mechanism moved by the upper feed moving means is disposed at the second movement position, only the upper cloth can be fed by a differential amount by operating the upper feed mechanism. it can.
Even with such a differential feed sewing machine, the amount of squeeze can be easily adjusted, and the quality of the sewing product can be improved.

  Hereinafter, embodiments of the present invention will be described with reference to FIGS.

(Embodiment 1)
A differential feed sewing machine 1 according to the present embodiment is a sewing machine that performs sewing while performing squeezing by providing a difference in the respective feed amounts of an upper cloth and a lower cloth to be sewn. For example, a body as a lower cloth It is used for sewing, etc., in which a sleeve fabric as an upper fabric is sewed into the fabric.
Here, a direction in which a sewing needle 131 described later moves up and down is a Y-axis direction (up-and-down direction), and one direction orthogonal thereto is an X-axis direction (front-and-rear direction), and both the Y-axis direction and the X-axis direction are A direction orthogonal to the Z-axis direction (left-right direction) is defined.

  As shown in FIGS. 1 and 2, the differential feed sewing machine 1 feeds a needle plate 2 on which an upper cloth and a lower cloth are placed and sewed, and an upper cloth on the needle plate 2 at a predetermined feed amount. The upper feed mechanism 3, the lower feed mechanism 4 that feeds the lower cloth on the needle plate 2 at a predetermined feed amount, the needle movement mechanism 5 that sews the upper cloth and the lower cloth that are fed at a predetermined feed amount, respectively. have.

The upper feed mechanism unit 3 includes an upper feed motor 11 (described later), and an upper feed belt 110 and the like that are driven by transmitting the rotational motion of the upper feed motor 11 via a pulley (not shown). Then, according to the driving of the upper feed belt 110, the upper cloth is fed in the direction of the arrow A along the X-axis direction in FIG.
Further, the upper feed mechanism unit 3 is provided so as to be movable with respect to the lower feed mechanism unit 4 by an upper feed moving unit 17 described later, and the distance between the upper feed mechanism unit 3 and the lower feed mechanism unit 4. Is adjustable.

  The lower feed mechanism unit 4 includes a lower feed motor 12 described later, and a lower feed belt 120 and the like that are driven by transmitting the rotational motion of the lower feed motor 12 via a pulley (not shown). Then, as the lower feed belt 120 is driven, the lower cloth is fed in the direction of the arrow A along the X-axis direction in FIG.

  The needle movement mechanism unit 5 includes a sewing machine motor 13 to be described later, a needle bar 130 that moves up and down according to the rotational drive of the sewing machine motor 13, a sewing needle 131 that is detachably attached to the needle bar 130, and the like. Then, the upper cloth and the lower cloth are stitched together by a sewing thread (not shown) supplied via the sewing needle 131 or the like.

The needle plate 2 has a shape in which the upper surface on which the upper cloth and the lower cloth are placed is curved in a convex shape, and an opening 2a is formed at a position corresponding to the lower side of the needle bar 130 (sewing needle 131). Has been. The lower feed belt 120 of the lower feed mechanism unit 4 and the upper feed belt 110 of the upper feed mechanism unit 3 are arranged to face each other through the opening 2a.
Then, the upper cloth and the lower cloth overlapped between the upper feed belt 110 and the lower feed belt 120 are fed in the X-axis direction (the direction of arrow A). A sewing thread (upper thread) (not shown) is passed in the vicinity of the tip of the sewing needle 131, and passes through the upper cloth and the lower cloth on the upper surface of the needle plate 2 by a reciprocating operation in the Y-axis direction. The upper thread is fed to the lower side of the sewing machine 2 and engaged with the lower thread that is not shown in the drawing to perform sewing.

  Further, as shown in FIG. 3, the differential feed sewing machine 1 includes an upper feed motor 11 that drives the upper feed belt 110, and a drive circuit 11 a that sends a drive control signal from the control unit 10 described later to the upper feed motor 11. A lower feed motor 12 for driving the lower feed belt 120, a drive circuit 12a for sending a drive control signal from the control unit 10 to be described later to the lower feed motor 12, a sewing machine motor 13 for driving the needle bar 130, and the sewing machine motor 13 A drive circuit 13a for sending a drive control signal from the control unit 10 described later, a thread tension solenoid 14 for applying tension to a sewing thread (not shown), and a drive for sending a drive control signal from the control unit 10 described later to the yarn tension solenoid 14 The upper feed moving means 17 for moving the circuit 14a and the upper feed mechanism unit 3 up and down, and the upper feed moving means 17 are controlled by a control unit 10 described later. A drive circuit 17a for sending a signal, a sewing machine starting pedal 15 for operating the differential feed sewing machine 1, an input circuit 15a for sending a driving input signal based on the operation of the sewing machine starting pedal 15 to the control unit 10 to be described later, An upper feed position detecting means 18 for detecting the position of the feed mechanism section 3, an input circuit 18a for sending a detection signal detected by the upper feed position detecting means 18 to the control section 10 to be described later, and a display device for displaying various setting switches, etc. And an operation panel 16 including a touch panel that detects a position signal based on the coordinates of various setting switches that are instructed to be touched, and a control unit 10 that performs operation / processing control of each of the above-described configurations.

The upper feed motor 11 is driven and controlled based on a drive control signal sent from the control unit 10 (MPU 10a), which will be described later, via the drive circuit 11a based on the operation of the sewing machine starting pedal 15. The upper feed motor 11 drives the upper feed belt 110 that feeds the upper cloth based on the drive control. Further, the lower feed motor 12 is driven and controlled based on a drive control signal sent from the control unit 10 (MPU 10a), which will be described later, via the drive circuit 12a based on the operation of the sewing machine starting pedal 15. The lower feed motor 12 drives the lower feed belt 120 that feeds the lower cloth based on the drive control.
As described above, the upper and lower cloths are fed by the predetermined feed amounts by the upper feed belt 110 and the lower feed belt 120, and sewing is performed. Here, the upper cloth can be squeezed by sewing by making the upper cloth feed amount larger than the lower cloth feed amount. In other words, the amount of urging can be adjusted by changing the difference in the amount of feeding between the upper and lower fabrics, and the amount of urging can be increased as the amount of feeding of the upper fabric is made larger than the amount of feeding of the lower fabric. it can.

  The sewing machine motor 13 rotates a sewing machine main shaft (not shown) based on a drive control signal sent from the control unit 10 (MPU 10a), which will be described later, via the drive circuit 13a based on the operation of the sewing machine starting pedal 15. The sewing machine main shaft is connected to the needle bar 130 via a conversion mechanism that converts rotational motion into reciprocating motion. When the sewing machine main shaft is rotated by the sewing machine motor 13, the needle bar 130 reciprocates, and with the movement of the needle bar 130, the sewing needle 131 provided at the tip of the needle bar 130 moves reciprocally, Drive the needle to sew the upper and lower cloth.

  The thread tension solenoid 14 is a drive source of a thread nipping section (not shown) that sandwiches the thread and applies tension to the thread, and receives a drive control signal sent from the control section 10 (MPU 10a), which will be described later, via the drive circuit 14a. By operating based on this, a predetermined amount of tension is applied to the yarn held by the yarn holding portion.

The upper feed moving means 17 includes a drive motor (not shown) and the like, and is driven and controlled based on a drive control signal sent from the control unit 10 (MPU 10a), which will be described later, via the drive circuit 17a. It moves so that it may approach or separate with respect to the lower feed mechanism part 4.
In particular, the upper feed moving means 17 sandwiches the upper cloth and the lower cloth between the upper feed mechanism section 3 and the lower feed mechanism section 4 so that the upper feed mechanism section 3 is close to the lower feed mechanism section 4. The first movement position that can be moved. The upper feed mechanism unit 3 and the lower feed mechanism unit 4 are arranged at the first movement position by linking the upper feed mechanism unit 3 and the lower feed mechanism unit 4 so that both the upper fabric and the lower fabric are fed in a predetermined manner. This is a position that can be sent by an amount (for example, a lower feed amount).
Further, the upper feed moving means 17 moves the upper feed mechanism unit 3 to a second movement position that is slightly separated from the lower feed mechanism unit 4 from the first movement position. The upper feed mechanism unit 3 and the lower feed mechanism unit 4 are arranged at the second movement position by operating only the upper feed mechanism unit 3 so that only the upper cloth is fed by a predetermined feed amount (for example, an urging amount). It is a position that can be sent in (differential amount).

  The sewing machine starting pedal 15 is an operation switch for an operator to operate the differential feed sewing machine 1. The sewing machine activation pedal 15 gives commands such as start, drive speed, and stop according to the operator's pedal depression operation and depression amount via an input circuit 15a that converts the movement of the activation pedal 15 into an electrical signal. It outputs to the control part 10 (MPU10a) mentioned later as a drive input signal, and drives the differential feed sewing machine 1. FIG.

  The upper feed position detection means 18 is a sensor that detects the position of the upper feed mechanism unit 3 by detecting the distance between the upper feed mechanism unit 3 and the lower feed mechanism unit 4, for example. The upper feed position detecting means 18 outputs a detection signal for detecting the position of the upper feed mechanism unit 3 detected by a predetermined operation and process to the control unit 10 (MPU 10a) to be described later via the input circuit 18a.

The operation panel 16 includes a display device such as an LCD as a display unit and a touch panel as an input unit provided on the surface of the display device.
The display device outputs various pieces of sewing information (for example, sewing pitch amount (upper feed amount, lower feed amount) relating to sewing pattern data), thread tension (thread tension), and each sewing step output from the control unit 10 (MPU 10a) described later. The display amount (section graphic, etc.) indicating the amount of sewing set and the sewing step in graphic form, various switches (setting switch, input switch), etc. are displayed.
The touch panel detects coordinates instructed by a touch reading principle such as an electromagnetic induction type, a magnetostriction type, or a pressure sensitive type, and outputs the detected coordinates to the control unit 10 (MPU 10a) described later as a position signal.
That is, the operation panel 16 displays various information, data, and the like, and associates the position information of various switches displayed on the display device of the operation panel 16 with the position information of the coordinates detected by the touch instruction on the touch panel. The inputted input instruction is output to the control unit 10 described later.

For example, various setting values and various data related to a desired sewing pattern are input on the operation panel 16 via various input keys and various setting keys (not shown). Various set values, data, and the like input are output to the control unit 10 and stored in an EEPROM 10d described later as sewing pattern data.
In particular, on the operation panel 16, the lower feed amount setting key (not shown) that functions as a part of the lower feed amount setting means inputs the data of the lower feed amount per stitch that the lower feed mechanism unit 4 feeds the lower cloth. Done. The input lower feed amount data is output to the control unit 10 and stored in the EEPROM 10d.
In the operation panel 16, setting value data for the upper feed mechanism 3 to feed the upper cloth is input via a setting value setting key (not shown) that functions as part of the setting value setting means. The input set value data is output to the control unit 10 and stored in the EEPROM 10d.

Note that the operation panel 16 of the differential feed sewing machine 1 may include an upper feed amount setting key (not shown) as a set value setting key that functions as part of the set value setting means.
Then, on the operation panel 16, the upper feed amount data is input per stitch that the upper feed mechanism section 3 feeds the upper cloth through an upper feed amount setting key (not shown) that functions as a part of the upper feed amount setting means. Is called. The input upper feed amount data is output to the control unit 10 and stored in the EEPROM 10d.

  The control unit 10 includes an MPU (Micro Processor Unit) 10a, a ROM (Read Only Memory) 10b, a RAM (Random Access Memory) 10c, and an EEPROM (Electrically Erasable and Programmable ROM) 10d. .

  The MPU 10a operates each part according to various control programs for the differential feed sewing machine stored in the ROM 10b according to the drive input signal input from the activation pedal 15 and various signals and data input from the operation panel 16. Centralized control is performed, the processing result is stored in a work area in the RAM 10c, and display data is generated and displayed on the operation panel 16 (display device thereof). Then, the processing result stored in the RAM 10c is stored in the EEPROM 10d. As described above, the MPU 10a has a function of controlling the display of the operation panel 16 (display device thereof) as well as a function of controlling driving of various actuators constituting the differential feed sewing machine 1.

In the ROM 10b, a control program and control data for the differential feed sewing machine 1 and data relating to various types of sewing are written and stored. In particular, the ROM 10b stores a plurality of sewing pattern data and various set values and data for performing shampooing.
The RAM 10c is provided with various work memories, counters, etc., and is used as a work area during the sewing operation, and various data relating to sham sewing processing are also temporarily stored in the RAM 10c.
The EEPROM 10d stores various sewing condition setting values (for example, a sewing section length, a feed amount, an urging amount (differential amount), a thread tension, the number of needles, etc.) set as sewing pattern data. In addition, the EEPROM 10d stores various data (for example, a lower feed amount, an upper feed amount, a differential amount (weighing amount), a ratio value, and the like) that are input via the operation panel 16.

And the control part 10 is based on the sewing pattern data memorize | stored in ROM10b or EEPROM10d according to the input of the drive input signal accompanying operation of the sewing machine starting pedal 15, and is the upper feed amount in the sewing pattern data. The upper feed mechanism 11 that controls the upper feed motor 11 is controlled so that the upper cloth is fed by the upper feed belt 110. Further, control is performed on the lower feed mechanism unit 4 that drives the lower feed motor 12 so that the lower cloth is fed by the lower feed belt 120 with the lower feed amount in the sewing pattern data. In addition, control related to the needle movement mechanism 5 that drives the sewing machine motor 13 so as to move the needle bar 130 up and down is performed in synchronization with the upper feed control and the lower feed control.
And the control part 10 supervises control of each mechanism part, and performs the sewing control for performing the sewing (especially basting) based on the desired sewing pattern data.

In particular, the control unit 10 functions as part of the lower feed amount setting means, and the lower feed amount input via a lower feed amount setting key (not shown) that functions as part of the lower feed amount setting means on the operation panel 16. Is stored in the EEPROM 10d.
Further, the control unit 10 functions as part of the upper feed amount setting means (setting value setting means), and functions as part of the upper feed amount setting means (setting value setting means) on the operation panel 16. Control is performed to store the data of the upper feed amount input via the amount setting key in the EEPROM 10d.

Further, the control unit 10 serves as a differential amount calculation unit, which is a differential amount (difference amount) in which the upper feed amount set by the upper feed amount setting unit (the operation panel 16, the control unit 10) exceeds the lower feed amount ( Control is performed to calculate the (weighting amount).
The differential amount is calculated by the following calculation formula (1)
(Differential amount) = (Upper feed amount) − (Lower feed amount) (1)
Is calculated by

Further, the control unit 10 is moved by the upper feed movement unit 17 as the interlock feed control unit so that the upper feed mechanism unit 3 is close to the lower feed mechanism unit 4, and the upper feed mechanism unit 3 and the lower feed mechanism unit. In the first movement position in which the upper cloth and the lower cloth are sandwiched between the upper cloth and the lower cloth, the upper feed mechanism section 3 and the lower feed mechanism section 4 are interlocked to feed both the upper cloth and the lower cloth by the lower feed amount. In this way, control for operating each part of the sewing machine is performed.
Further, the control unit 10 serves as a differential amount feed control unit by a second movement position in which the upper feed mechanism unit 3 is slightly separated from the lower feed mechanism unit 4 by the upper feed movement unit 17 from the first movement position. , The upper feed mechanism 3 is operated, and the differential which is the difference in which the feed amount per stitch to which the upper fabric is fed exceeds the lower feed amount in accordance with the upper feed amount which is the set value only for the upper fabric Control is performed to operate each part of the sewing machine so as to send in the amount (the amount of crease). The differential amount is calculated by the calculation formula (1) by the control unit 10 as the differential amount calculation means.

  Next, processing relating to the operation of sew-in stitches in the differential feed sewing machine 1 will be described based on the flowchart shown in FIG.

First, based on the main power supply of the differential feed sewing machine 1 being turned on, the control unit 10 of the differential feed sewing machine 1 performs an initialization operation and is input via the operation panel 16 and stored in the EEPROM 10d. The lower feed amount and the upper feed amount that are present are read and acquired (step S101).
Then, the control unit 10 acquires a squeeze amount that is a differential amount based on the acquired lower feed amount and upper feed amount (step S102).

Next, the control unit 10 determines whether or not the lower feed amount has been changed (step S103).
When the control unit 10 determines that the lower feed amount has been changed (step S103; Yes), the process returns to step S102.
On the other hand, when the control unit 10 determines that the lower feed amount has not been changed (step S103; No), the process proceeds to step S104.

In step S104, the control unit 10 determines whether or not the upper feed amount has been changed (step S104).
When the control unit 10 determines that the upper feed amount has been changed (step S104; Yes), the process returns to step S102.
On the other hand, when the control unit 10 determines that the upper feed amount has not been changed (step S104; No), the process proceeds to step S105.

In step S105, the control unit 10 determines whether or not the sewing machine activation pedal 15 is depressed and operated (step S105).
When the control unit 10 determines that the sewing machine activation pedal 15 is not depressed and is not operated (step S105; No), the process returns to step S103.
On the other hand, when the control unit 10 determines that the sewing machine starting pedal 15 is depressed and operated (step S105; Yes), the control unit 10 starts the rotation of the sewing machine motor 13 (step S106) and performs the sewing operation. Control each part to do.

Next, the control unit 10 determines whether or not the upper feed mechanism unit 3 is moved by the upper feed moving unit 17 and is disposed at the lower position which is the first movement position (step S107).
When the control unit 10 determines that the upper feed mechanism unit 3 is disposed at the first movement position (lower position) (step S107; Yes), the control unit 10 drives the lower feed motor 12 by the lower feed amount. At the same time, the upper feed motor 11 is driven by the lower feed amount, and the lower feed mechanism unit 4 and the upper feed mechanism unit 3 are interlocked to feed both the upper fabric and the lower fabric by the lower feed amount (step S108). Proceed to
On the other hand, when the control unit 10 determines that the upper feed mechanism unit 3 is not disposed at the first movement position (lower position) (step S107; No), the process proceeds to step S109.

In step S109, the control unit 10 determines whether or not the upper feed mechanism unit 3 is moved by the upper feed moving unit 17 and is disposed at the upper position which is the second movement position (step S109).
When the control unit 10 determines that the upper feed mechanism unit 3 is disposed at the second movement position (up position) (step S109; Yes), the control unit 10 pushes the upper feed motor 11 into the urging amount (difference). And the upper feed mechanism 3 is actuated to feed only the upper cloth with the squeeze amount (differential amount) (step S110), and the process proceeds to step S111.
On the other hand, when the control unit 10 determines that the upper feed mechanism unit 3 is not disposed at the second movement position (upper position) (step S109; No), the process proceeds to step S111.

In step S111, the control unit 10 determines whether or not the sewing machine activation pedal 15 is depressed and operated (step S111).
When the control unit 10 determines that the sewing machine starting pedal 15 is depressed and operated (step S111; Yes), the process returns to step S107.
On the other hand, when the control unit 10 determines that the sewing machine starting pedal 15 is not depressed and is not operated (step S111; No), the control unit 10 stops the rotation of the sewing machine motor 13 (step S112), and the step Return to S103.

  As described above, the differential feed sewing machine 1 according to the present invention has a lower feed when the upper feed mechanism 3 moved by the upper feed moving means 17 is disposed at the first movement position (lower position). The motor 12 is driven by the lower feed amount and the upper feed motor 11 is driven by the lower feed amount, and the lower feed mechanism unit 4 and the upper feed mechanism unit 3 are interlocked so that both the upper fabric and the lower fabric are combined. When the upper feed mechanism 3 moved by the upper feed moving means 17 is arranged at the second movement position (upper position), and can be fed by the lower feed amount that is the sewing pitch amount per needle. In addition, the upper feed mechanism unit 3 can be operated so as to drive the upper feed motor 11 by the amount of squeeze (differential amount), and only the upper cloth can be fed by the squeeze amount (differential amount).

In other words, when the differential feed sewing machine 1 feeds the upper cloth longer than the lower cloth and applies bulging, the upper feed mechanism 3 is in the second movement position, and the lower cloth and the upper cloth are the lower feed mechanism. 4 (lower feed belt 120) and the upper feed mechanism 3 (upper feed belt 110) are not clamped by the differential feed sewing machine 1 during the sewing operation, depending on the state of the sewing product being cut. Thus, the operator can prevent the upper cloth from being fed by the upper feed mechanism section 3 by pulling the upper cloth so as to finely adjust the amount of intrusion. Therefore, sewing can be performed so as to reduce the amount of squeeze by the amount that the upper cloth is prevented from being fed by the upper feed mechanism section 3.
Further, during the sewing operation of the differential feed sewing machine 1, when the operator feeds the upper cloth so as to finely adjust the amount of sewing according to the state of the workpiece being cut, the upper cloth is moved upward. The upper cloth can be fed more (longer) than the predetermined amount (upward feed amount) sent by the feed mechanism section 3. Therefore, it is possible to perform sewing so that the amount of squeeze is increased by the amount that the upper fabric is fed beyond that fed by the upper feed mechanism 3.

  As described above, the differential feed sewing machine 1 can perform the sew-on stitch so as to easily fine-tune the squeeze amount according to the state in which the operator cuts the sewing product. In order to temporarily change the set amount of the squeeze amount, there is no need to perform a troublesome setting amount changing operation on the operation panel or the like, and the sewing work can be performed efficiently.

  In addition, since the lower cloth and the upper cloth are not sandwiched between the lower feed mechanism section 4 (lower feed belt 120) and the upper feed mechanism section 3 (upper feed belt 110) at the time of intrusion, The upper cloth is not rubbed strongly. If the lower cloth and the upper cloth are not rubbed strongly, there will be no feed scratches on the cloth, and the quality of the sewn product will not be deteriorated.

  Therefore, the differential feed sewing machine according to the present invention can be said to be a differential feed sewing machine that can easily adjust the amount of squeeze and improve the quality of the sewing product.

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

The operation panel 16 of the differential feed sewing machine 1 may include a differential amount setting key (not shown) as a setting value setting key that functions as part of the setting value setting means.
Then, on the operation panel 16, the feed amount per needle (that is, the upper feed) through which the upper cloth is fed through a differential amount setting key (not shown) that functions as a part of the differential amount setting means (setting value setting means). The differential amount data, which is a difference in which the upper feed amount per stitch that the mechanism unit 3 feeds the upper cloth exceeds the lower feed amount, is input. The input differential amount data is output to the control unit 10 and stored in the EEPROM 10d.

The control unit 10 functions as part of the lower feed amount setting means, and the data of the lower feed amount input via a lower feed amount setting key (not shown) that functions as part of the lower feed amount setting means on the operation panel 16. Is stored in the EEPROM 10d.
Further, the control unit 10 functions as a part of the differential amount setting unit (setting value setting unit), and functions as a part of the differential amount setting unit (setting value setting unit) on the operation panel 16. Control is performed to store the data of the differential quantity input via the quantity setting key in the EEPROM 10d.

Then, the control unit 10 is moved by the upper feed movement unit 17 as the interlock feed control unit so that the upper feed mechanism unit 3 comes close to the lower feed mechanism unit 4, and the upper feed mechanism unit 3 and the lower feed mechanism unit are moved. In the first movement position in which the upper cloth and the lower cloth are sandwiched between the upper cloth and the lower cloth, the upper feed mechanism section 3 and the lower feed mechanism section 4 are interlocked to feed both the upper cloth and the lower cloth by the lower feed amount. In this way, control for operating each part of the sewing machine is performed.
Further, the control unit 10 serves as a differential amount feed control unit by a second movement position in which the upper feed mechanism unit 3 is slightly separated from the lower feed mechanism unit 4 by the upper feed movement unit 17 from the first movement position. Then, the upper feed mechanism 3 is operated to control each part of the sewing machine so that only the upper cloth is fed by a differential amount (an amount of squeeze) as a set value.

  Thus, in the differential feed sewing machine 1, the feed amount per needle (upper feed amount) to which the upper cloth is fed via the differential amount setting key (not shown) of the operation panel 16 is set to the lower feed amount. Even if a differential amount that is an excess difference is input and set, the control unit 10 as the interlocking feed control means uses a lower feed amount that is a sewing pitch amount per stitch for both the upper fabric and the lower fabric. The sewing machine can be controlled so as to send, and the control unit 10 as the differential feed control means controls so that only the upper cloth is sent with a differential amount (an urging amount) which is a set value. Can do.

Therefore, even with such a differential feed sewing machine 1, it is possible to perform sew-in sewing so that the operator can easily fine-tune the squeeze amount according to the state in which the sewing product is cut. Therefore, it is not necessary to perform a troublesome setting amount changing operation on the operation panel or the like in order to temporarily change the set amount of the pre-set amount of sewing, and the sewing operation can be performed efficiently.
In addition, since the lower cloth and the upper cloth are not sandwiched between the lower feed mechanism section 4 (lower feed belt 120) and the upper feed mechanism section 3 (upper feed belt 110) at the time of intrusion, The upper cloth is not rubbed strongly. If the lower cloth and the upper cloth are not rubbed strongly, there will be no feed scratches on the cloth, and the quality of the sewn product will not be deteriorated.

  Therefore, it can be said that this differential feed sewing machine is a differential feed sewing machine that can easily adjust the amount of squeeze and can improve the quality of the sewing product.

(Embodiment 3)
Next, a third embodiment of the differential feed sewing machine according to the present invention will be described. In addition, the same code | symbol is attached | subjected to the same part as Embodiment 1, and only a different part is demonstrated.

The operation panel 16 of the differential feed sewing machine 1 may be provided with a ratio value setting key (not shown) as a setting value setting key that functions as a part of the setting value setting means. The differential amount with respect to the lower feed amount set by the lower feed amount setting means (operation panel 16, control unit 10) via a ratio value setting key (not shown) that functions as a part of the value setting means (set value setting means). The ratio value data is input. The input differential value ratio data is output to the control unit 10 and stored in the EEPROM 10d.

The control unit 10 functions as part of the lower feed amount setting means, and the data of the lower feed amount input via a lower feed amount setting key (not shown) that functions as part of the lower feed amount setting means on the operation panel 16. Is stored in the EEPROM 10d.
Further, the control unit 10 functions as a part of the ratio value setting means (setting value setting means), and functions as a part of the ratio value setting means (setting value setting means) on the operation panel 16. The ratio value data input via the control is stored in the EEPROM 10d.

Further, the control unit 10 serves as a differential amount calculation unit based on the ratio value set by the ratio value setting unit (the operation panel 16 and the control unit 10). Control is performed to calculate a differential amount (an erosion amount) that is a difference exceeding the amount.
The differential amount is calculated using the following formula (2)
(Differential amount) = (bottom feed amount) × (ratio value (for example, 10% = 0.1)) (2)
Is calculated by

Then, the control unit 10 is moved by the upper feed movement unit 17 as the interlock feed control unit so that the upper feed mechanism unit 3 comes close to the lower feed mechanism unit 4, and the upper feed mechanism unit 3 and the lower feed mechanism unit are moved. In the first movement position in which the upper cloth and the lower cloth are sandwiched between the upper cloth and the lower cloth, the upper feed mechanism section 3 and the lower feed mechanism section 4 are interlocked to feed both the upper cloth and the lower cloth by the lower feed amount. In this way, control for operating each part of the sewing machine is performed.
Further, the control unit 10 serves as a differential amount feed control unit by a second movement position in which the upper feed mechanism unit 3 is slightly separated from the lower feed mechanism unit 4 by the upper feed movement unit 17 from the first movement position. , The upper feed mechanism unit 3 is operated, and the differential amount, which is the difference in which the feed amount per stitch to which the upper fabric is fed exceeds the lower feed amount in accordance with the ratio value which is the set value for only the upper fabric Control is performed to operate each part of the sewing machine so that it is sent at (the amount of squeeze). The differential amount is calculated by the calculation formula (2) by the control unit 10 as the differential amount calculating means.

  As described above, in the differential feed sewing machine 1, the ratio value of the differential amount with respect to the lower feed amount set by the lower feed amount setting means is input via the ratio value setting key (not shown) of the operation panel 16. The differential amount (the amount of squeeze) is a difference in which the control unit 10 as a differential amount calculation means sets and the feed amount per stitch to which the upper cloth is fed exceeds the lower feed amount based on the ratio value However, the control unit 10 as the interlocking feed control means can control the sewing machine so that both the upper cloth and the lower cloth are fed at the lower feed amount that is the sewing pitch amount per stitch. Moreover, the control part 10 as a differential amount feed control means can control so that only the upper cloth is sent with a differential amount (an erosion amount) which is a set value.

Therefore, even with such a differential feed sewing machine 1, it is possible to perform sew-in sewing so that the operator can easily fine-tune the squeeze amount according to the state in which the sewing product is cut. Therefore, it is not necessary to perform a troublesome setting amount changing operation on the operation panel or the like in order to temporarily change the set amount of the pre-set amount of sewing, and the sewing operation can be performed efficiently.
In addition, since the lower cloth and the upper cloth are not sandwiched between the lower feed mechanism section 4 (lower feed belt 120) and the upper feed mechanism section 3 (upper feed belt 110) at the time of intrusion, The upper cloth is not rubbed strongly. If the lower cloth and the upper cloth are not rubbed strongly, there will be no feed scratches on the cloth, and the quality of the sewn product will not be deteriorated.

  Therefore, it can be said that this differential feed sewing machine is a differential feed sewing machine that can easily adjust the amount of squeeze and can improve the quality of the sewing product.

  In the above embodiment, the feed motor of the differential feed sewing machine drives the feed belt, and the workpiece (cloth) is fed by the feed belt. However, the present invention is limited to this. A configuration may be employed in which the material to be sewn (cloth) is fed by a feed dog or the like.

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

1 is a perspective view of a differential feed sewing machine according to the present invention. FIG. 2 is an enlarged view of a portion II in FIG. 1 and is an enlarged view around the upper feed mechanism portion of the differential feed sewing machine. It is a block diagram which shows the principal part structure of the differential feed sewing machine concerning this invention. It is a flowchart which shows the process regarding the operation | movement of the sewing-in sewing in a differential feed sewing machine.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Differential feed sewing machine 2 Needle plate 3 Upper feed mechanism part 4 Lower feed mechanism part 5 Hand movement mechanism part 10 Control part (lower feed amount setting means, set value setting means, upper feed amount setting means, differential amount setting means, ratio Value setting means, differential amount calculation means, interlock feed control means, differential feed control means)
10a MPU
10b ROM
10c RAM
10d EEPROM
15 sewing machine starting pedal 16 operation panel (lower feed amount setting means, set value setting means, upper feed amount setting means, differential amount setting means, ratio value setting means)
17 Upper feed moving means 18 Upper feed position detecting means

Claims (4)

A throat plate on which the lower cloth and the upper cloth are stacked;
A lower feed mechanism that is arranged on the needle plate side and feeds the lower cloth;
An upper feed mechanism section for feeding the upper cloth;
An upper feed moving means for moving the upper feed mechanism with respect to the lower feed mechanism;
A lower feed amount setting means for setting a lower feed amount per needle that the lower feed mechanism section sends the lower cloth;
Set value setting means for setting a set value for the upper feed mechanism section to feed the upper cloth;
The upper feed mechanism is moved so that the upper feed mechanism is close to the lower feed mechanism, and the upper cloth and the lower cloth are interposed between the upper feed mechanism and the lower feed mechanism. Interlocking feed control means for interlocking the upper feed mechanism portion and the lower feed mechanism portion at a first movement position that sandwiches the upper fabric and the lower fabric together with the lower feed amount;
The upper feed movement means operates the upper feed mechanism portion at a second movement position where the upper feed mechanism portion is slightly separated from the lower feed mechanism portion from the first movement position. A differential amount feed control means for sending only the cloth in a differential amount that is a difference in which the feed amount per stitch to which the upper cloth is fed exceeds the lower feed amount, according to the set value;
A differential feed sewing machine comprising: The set value setting means, as the set value, an upper feed amount setting means for setting an upper feed amount per stitch that the upper feed mechanism section sends the upper cloth;
Differential amount calculating means for calculating a differential amount that is a difference in which the upper feed amount set by the upper feed amount setting means exceeds the lower feed amount;
The differential feed sewing machine according to claim 1, further comprising:   The set value setting means includes a differential amount setting means for setting a differential amount, which is a difference in which the feed amount per stitch to which the upper cloth is fed exceeds the lower feed amount, as the set value. The differential feed sewing machine according to claim 1, wherein the differential feed sewing machine is a differential feed sewing machine. The set value setting means, as the set value, a ratio value setting means for setting a ratio value of the differential amount with respect to the lower feed amount set by the lower feed amount setting means;
A differential amount calculating means for calculating a differential amount that is a difference in which a feed amount per stitch to which the upper cloth is fed exceeds the lower feed amount based on the ratio value set by the ratio value setting means; ,
The differential feed sewing machine according to claim 1, further comprising:

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