JP2005087336A - Sewing machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To apply predetermined sewing patterns constantly and accurately to an object to be sewn without depending on the structure of a feeding mechanism and a feeding amount adjusting mechanism. <P>SOLUTION: An operation panel 11 is provided with a correction input part 11a by which correction input relative to the cloth feeding amount can be performed for each unit of sewing pattern information stored in a ROM 82. A sewing control program 102 has a correction control program 103 which corrects the cloth feeding amount according to the correction input at the correction input part 11a and controls the feeding amount adjusting mechanism. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a sewing machine that forms a predetermined sewing pattern on a sewing product by adjusting a feed amount of the sewing product during sewing and a swinging amount of a sewing needle.

  Conventionally, a sewing machine has been provided with a feed mechanism that feeds a material to be sewn, such as a cloth, in a predetermined direction when performing a predetermined sewing operation. In recent years, a feed mechanism including a feed amount adjusting mechanism that changes the movement locus of a feed dog that feeds a workpiece has been proposed and put into practical use (for example, see Patent Document 1). The feed amount adjusting mechanism swings the feed dog in the vertical direction and the horizontal direction at the same cycle. A swinging force in the left-right direction is transmitted to the feed dog via a square piece. Here, the square piece is configured such that the swing direction can be adjusted, and the swing state of the feed dog is adjusted by adjusting the swing direction. Note that the swing direction of the square piece is switched by a manual operation lever or solenoid. By adjusting the swing direction of the square piece, the swing amplitude and phase of the feed dog in the left-right direction change, and the feed amount by the feed dog can be switched from the forward direction to the reverse direction.

These sewing machines form a sewing pattern information by combining a plurality of stitch information for each stitch including a feed amount and a needle swing amount per stitch, and pattern sewing is performed on a sewing product by repeating sewing based on the sewing pattern information. Is supposed to form. These pieces of sewing pattern information include information stored in advance in the ROM of the sewing machine and custom patterns created by the operator setting stitch information for each stitch.
JP 2000-51557 A

  However, in the sewing machine, the feed dog is oscillated by interposing a square piece or the like to adjust the feed amount. Therefore, a calculation sewing object instructed from the control device to the sewing machine motor due to backlash or slippage of the mechanism. There is a problem that an error occurs between the feed amount of the sewing machine and the actual feed amount of the sewing product. Thereby, the sewing pattern formed on the workpiece may be different from the assumed sewing pattern.

  The present invention has been made in view of the above circumstances, and the object of the present invention is to always accurately apply a predetermined sewing pattern to the workpiece without depending on the structure of the feed mechanism and the feed amount adjusting mechanism. It is to provide a sewing machine that can be used.

  In order to achieve the above object, according to the first aspect of the present invention, a needle up-and-down movement mechanism that moves a sewing needle up and down, a feed mechanism that feeds a workpiece in synchronization with the needle up-and-down movement mechanism, A feed amount adjusting mechanism capable of adjusting a feed amount per one cycle of the vertical movement of the sewing needle in the feed mechanism, and a needle capable of adjusting a swing amount of the sewing needle in a direction substantially perpendicular to the feed direction by the feed mechanism. Storage in which sewing pattern information configured by combining a plurality of stitching information and stitch information including the feed amount and the swing amount of the sewing needle for inserting each sewing needle into the sewing product is stored in advance. And a sewing control means for controlling the feed amount adjusting mechanism and the needle swinging mechanism based on the sewing pattern information stored in the storage means, at least one of the sewing pattern information. Operating means having selection means for selecting the stitch information, correction input means capable of performing correction input related to the feed amount, and the sewing control means based on the correction input in the correction input section. And correction control means for correcting the feed amount of the selected stitch information and controlling the feed amount adjusting mechanism.

  According to the first aspect of the present invention, at least one stitch information of the sewing pattern information can be selected by the selection means, and correction input relating to the feed amount of the stitch information selected by the correction input means can be performed. As a result, the sewing manufacturer responds to this error when an error occurs between the calculated feed amount of the sewing product in the feed mechanism, the feed amount adjusting mechanism, and the actual feed amount of the sewing product. The feed amount can be corrected. That is, for example, even when the power transmission path of the feed mechanism, the feed amount adjusting mechanism, or the like is long or when friction is used for power transmission, a desired sewing state can be obtained even when an error is likely to occur in the feed amount. Thus, the feed amount can be accurately corrected.

  According to a second aspect of the present invention, in the sewing machine according to the first aspect, the feed amount adjusting mechanism includes a forward direction that is a steady feed direction of the sewing product and a reverse direction opposite to the forward direction. The stitch direction selecting means collectively selects stitch information in the sewing pattern in accordance with the forward and reverse directions of the feed direction.

  According to the invention described in claim 2, in addition to the action of claim 1, it is possible to input the correction in the forward direction or the reverse direction in one time without inputting the correction amount of the feed amount for each stitch. The burden on the sewing manufacturer can be reduced. Further, it is possible to effectively correct the sewing pattern in which the error is greatly different between the normal direction and the reverse direction.

  According to a third aspect of the present invention, in the sewing machine according to the second aspect, the correction control means independently determines whether the feed amount of each stitch information is the forward direction or the reverse direction. The feed amount is corrected.

  According to the invention of claim 3, in addition to the operation of claim 2, the feed amount is independently corrected in the forward direction and the reverse direction. Here, even if the feed amount is the same in the forward direction and the reverse direction, the reverse of the forward direction may occur depending on whether the sewing product is not being sent out by the same power transmission mechanism or the state of the sewing product. The feed amount error may differ depending on the direction. In some cases, the sewing pattern requires accuracy only in any one direction. In such a case, since the correction is performed independently in the forward direction and the reverse direction with different errors, it is possible to finely adjust the feed amount corresponding to each direction.

  According to a fourth aspect of the present invention, in the sewing machine according to any one of the first to third aspects, the stitch selecting means selects the stitch information having a common feed amount in the sewing pattern at a time. And

  According to the invention described in claim 4, in addition to the operation of any one of claims 1 to 3, stitch information having a common feed amount is selected at once, and these stitches are corrected collectively. It becomes. That is, it is possible to select and correct only the feed amount at which the finish after sewing is particularly deteriorated, and for the feed amount that does not need to be corrected, it is possible to simplify the correction control by omitting arithmetic processing related to the correction. it can.

  According to a fifth aspect of the present invention, in the sewing machine according to any one of the first to fourth aspects, the correction input means selects whether or not to correct the feed amount by the correction control means. It has an input part.

  According to the fifth aspect of the invention, in addition to the operation of any one of the first to fourth aspects, the sewing manufacturer can select whether or not to correct the feed amount by the selection input unit. It is very convenient.

  Thus, according to the present invention, the feed amount can be corrected according to the error. For example, when the power transmission path of the feed mechanism, the feed amount adjustment mechanism, or the like is long, Even when an error is likely to occur in the feed amount, such as when friction is used, the feed amount can be accurately corrected so as to obtain a desired sewing state. Therefore, a predetermined sewing pattern can always be accurately applied to the workpiece without depending on the structure of the feed mechanism and the feed amount adjusting mechanism.

1 to 11 show an embodiment of the present invention. FIG. 1 is a schematic diagram for explaining the overall configuration of the sewing machine, FIG. 2 is a cross-sectional view taken along line II-II in FIG. 1, and FIG. Sectional view of III-III part of 2,
4 is an explanatory diagram for explaining the feed amount adjusting mechanism, FIG. 5 is an explanatory diagram for explaining the needle swing mechanism, and FIG. 6 is a schematic block diagram showing a control system of the sewing machine.

  As shown in FIG. 1, the sewing machine 1 is placed on a sewing machine table Z, and has a bed portion 2 having a needle plate on the upper surface, and extends substantially parallel to the bed portion 2 above the bed portion 2. The arm part 3 which exists and the trunk | drum 4 which is standingly arranged by the one end part side of the bed part 2, and supports the one end side of the arm part 3 are included.

  Further, the sewing machine 1 is disposed in the arm portion 3, a needle bar 5 extending downward from the other end of the arm portion 3 and movable up and down, a sewing needle 6 fixed to the needle bar 5, and the arm portion 3. A sewing machine motor 7 that rotationally drives the upper shaft 12a, a needle vertical movement mechanism that moves the needle bar 5 and the sewing needle 6 up and down by the rotational driving force of the upper shaft 12a, and the needle vertical movement mechanism that synchronizes with the needle vertical movement mechanism. And a control device 8 as a sewing control means for integrally controlling the overall operation of the sewing machine 1.

  Further, the sewing machine 1 includes a manually operated reverse stitching operation lever 9 for operating the feed mechanism, an operation pedal 10 for adjusting the rotational speed of the sewing machine motor 7 by the amount of stepping, and an upper limit of the feed amount of the feed mechanism. And an operation panel 11 having various switches for setting values, lower limits, and the like.

  As shown in FIG. 2, the feed mechanism has a feed electric mechanism 20 that transmits the rotational movement of the lower shaft 12 b that rotates synchronously with the upper shaft 12 a by the sewing machine motor 7 to the feed dog 13. Further, the sewing machine 1 is provided with a feed amount adjusting mechanism capable of adjusting the cloth feed amount per cycle of the vertical movement of the sewing needle 6 in the feed mechanism. In the present embodiment, as shown in FIG. 2, the feed amount adjusting mechanism includes a square piece 30 for changing the feed amount of the feed dog 13, a feed adjusting shaft 40 for fitting the square piece 30, and a drive motor for setting the feed amount. The feed stepping motor 50 is provided. Hereinafter, these mechanisms will be described in detail.

  As shown in FIG. 2, a lower shaft 12 b extending in the front-rear direction is arranged in the bed portion 2, and is connected to the output shaft of the sewing machine motor 7 through a transmission mechanism such as a link mechanism or a belt mechanism. . At the front end of the lower shaft 12b, a feed dog 13 is provided below the presser foot and is provided so as to be able to protrude and retract with respect to the needle plate. A feed electric mechanism 20 is disposed behind the lower shaft 12b. By this feed electric mechanism 20, the rotational driving force of the lower shaft 12 b is transmitted to the feed dog 13.

  As shown in FIG. 3, the feed electric mechanism 20 includes a horizontal feed cam 21, a horizontal feed rod 22, a horizontal feed connecting rod 23, a horizontal feed arm 24, a horizontal feed shaft 25, a feed base arm 26, a feed base 27, and a vertical base. A feed link 28 and the like are provided.

  The horizontal feed cam 21 has an eccentric cam that is eccentric with respect to the lower shaft 12b, and this eccentric cam is rotatably connected to the upper end of a horizontal feed rod 22 that extends substantially vertically via a bearing. A lower end portion of the horizontal feed rod 22 is rotatably connected to a left and right intermediate portion of a horizontal feed connecting rod 23 extending substantially left and right. A right end portion of the horizontal feed connecting rod 23 is rotatably connected to a lower end portion of a horizontal feed arm 24 that extends substantially vertically. An upper end portion of the horizontal feed arm 24 is fixed to a rear end portion of the horizontal feed shaft 25 extending substantially front and rear. The horizontal feed shaft 25 is attached to the bed portion 2 so as to be rotatable about the front-rear direction, and the front end portion thereof is fixed to the lower end of the feed base arm 26 extending substantially vertically. The upper end portion of the feed base arm 26 is rotatably connected to the right end portion of the feed base 27.

  The feed dog 13 is fixed to the feed base 27. A left end portion of the feed base 27 is rotatably connected to an upper end portion of a vertical feed link 28 that extends substantially vertically. The lower end portion of the vertical feed link 28 is rotatably connected via an eccentric cam 28a provided at the front end portion of the lower shaft 12b. On the other hand, a square piece 30 is connected to the left end of the horizontal feed connecting rod 23.

  As shown in FIG. 3, the square piece 30 is supported by the feed adjustment shaft 40 so as to be reciprocally swingable along a direction substantially orthogonal to the front-rear direction. In other words, by changing the swinging direction of the square piece 30, the movement amount of the feed dog 13 can be changed to change the feed amount. The square piece 30 is fitted in a groove 40a formed at the front and rear intermediate portion of the feed adjusting shaft 40, and the swing direction of the square piece 30 is defined by the groove 40a. The groove 40a can swing within a certain range from a predetermined reference position.

  As shown in FIG. 4, the feed adjustment shaft 40 extending substantially front and rear is attached to the bed portion 2 so as to be rotatable about the front and rear direction. An upper end portion of a first feed adjustment link 41 extending substantially vertically is fixed to the rear end portion of the feed adjustment shaft 40. The lower end portion of the first feed adjustment link 41 is rotatably connected to the left end portion of the second feed adjustment link 42 extending substantially in the left-right direction. The right end portion of the second feed adjustment link 42 is rotatably connected to the upper end portion of the third feed adjustment link 43 extending substantially vertically. The lower end portion of the third feed adjustment link 43 is fixed to the output shaft 50 a of the feed stepping motor 50.

  As shown in FIG. 1, the operation lever 9 is attached to the body portion 4 so as to be rotatable in the vertical direction within a predetermined range. The operation lever 9 is urged upward by a coil spring, and when it is rotated downward by a sewing manufacturer or the like, an operation amount is detected by a potentiometer 70. As shown in FIG. 6, the potentiometer 70 is connected to the control device 8, and controls the movement state of the feed dog 13 according to the operation amount of the operation lever 9 to adjust the cloth feed amount. Yes.

  In the sewing machine 1 configured as described above, when the operating pedal 10 is stepped on to drive the sewing machine motor 7 to rotate the lower shaft 12b, the rotational motion of the lower shaft 12b is caused by the horizontal feed cam 21 and the horizontal feed rod 22. The horizontal feed shaft 25 is reciprocally rotated by being transmitted to the horizontal feed shaft 25 through the horizontal feed connecting rod 23 and the horizontal feed arm 24. Then, the reciprocating rotational motion of the horizontal feed shaft 25 is transmitted to the feed dog 13 via the feed base arm 26 and the feed base 27, and the reciprocating motion of the feed dog 13 in the left-right direction is realized. Further, since the rotational motion of the lower shaft 12b is transmitted to the feed base 27 via the vertical feed link 28, the reciprocating motion in the upward direction of the feed dog 13 fixed on the feed base 27 is realized.

  As a result, the feed dog 13 performs a circular or elliptical motion by combining the reciprocating motions in the left and right directions and the up and down directions, and performs a cloth feed motion that feeds the cloth CL pressed from above by the cloth presser foot in a predetermined direction. . That is, if the circular or elliptical motion is performed so that the feed dog 13 moves from left to right in FIG. 3 while protruding upward from the needle plate, the cloth CL is fed in the positive direction. If the circular or elliptical movement is performed so that the feed dog 13 moves from right to left in FIG. 3 while protruding upward from the needle plate, the cloth CL is fed in the opposite direction. That is, the feed amount adjusting mechanism is configured to be able to change the feed direction of the sewing product between a normal direction that is a steady feed direction of the sewing product and a reverse direction opposite to the normal direction.

  Conversion between the forward direction and the reverse direction of the cloth feed direction of the feed dog 13 is performed by changing the rotation phase of the horizontal feed shaft 25 with respect to the rotation phase of the lower shaft 12b. This change is realized by changing the inclination angle of the square piece 30 (the rotation angle with respect to a predetermined reference position). That is, when the square piece 30 performs a reciprocating rocking motion, the horizontal component of the rocking motion is transmitted to the feed dog 13. Therefore, when the square piece 30 is rotated in the A direction from the initial position shown in FIG. 3, the feed dog 13 moves in the forward direction, and when it is rotated in the B direction, the feed dog 13 is in the reverse direction. Do exercise. In addition, when the square piece 30 reciprocally swings in the up and down direction at these intermediate positions, since the horizontal component is zero, the cloth feed is not performed.

  Further, regardless of whether the feed dog 13 performs forward feed or reverse feed, the movement trajectory of the feed dog 13 is circular or elliptical, but the cloth feed amount is changed by changing the diameter in the left-right direction. The That is, by changing the range of the rotation angle of the feed base arm 26 with the horizontal feed shaft 25 as a fulcrum per rotation of the lower shaft 12b, the diameter in the left-right direction in the movement trajectory of the feed base 27 and the feed dog 13 is changed. Is changed, whereby the cloth feed amount is changed. Specifically, as the rotation angle of the square piece 30 increases, the cloth feed amount per rotation of the lower shaft 12b increases.

  As described above, the feed direction and feed amount of the feed dog 13 can be changed by changing the inclination angle of the square piece 30. The inclination angle of the square piece 30 is changed by the above-described feeding stepping motor 50. That is, when the feed stepping motor 50 is operated by operating the operation lever 9 and the output shaft 50a is rotated clockwise in FIG. 4, the feed adjustment shaft 40 is moved through the adjustment links 41, 42, 43. It rotates in the A direction. When the output shaft 50a rotates counterclockwise, the feed adjustment shaft 40 rotates in the B direction via the adjustment links 41, 42, and 43. In this way, the feed stepping motor 50 rotates the feed adjustment shaft 40 via the respective adjustment links 41, 42, 43, thereby changing the inclination angle of the square piece 30 and changing the feed direction of the feed dog 13 or the like. The feed amount can be changed.

  The sewing needle 6 is provided on the lower end side of the needle bar 5, and the needle bar 5 is supported by a needle driving mechanism. The needle drive mechanism converts the rotational driving force of the upper shaft 12a into a vertical reciprocating motion using a crank mechanism, a cam mechanism, etc., and moves the needle bar 5 up and down via the needle bar support 5a.

  Further, as shown in FIG. 5, the needle swinging mechanism connects the needle swinging stepping motor 60, the needle bar support 5a and the needle swinging stepping motor 60 to convert the rotational motion of the motor into a back and forth reciprocating motion. A plurality of connecting members 61. This needle swing direction is substantially orthogonal to the feed direction, and the amount of swing of the sewing needle 6 can be adjusted. That is, the sewing direction can be arbitrarily set by combining the workpiece feed and the needle swing.

  As illustrated in FIG. 6, the control device 8 includes a CPU 81 as a calculation unit, a ROM 82 as a nonvolatile memory, and a RAM 83 as a volatile memory. The control device 8 is connected to a sewing machine motor 7, an encoder 32 for detecting the rotation speed, a potentiometer 70 for detecting the operation amount of the operation lever 9, and a feed mechanism for setting the feed amount of the feed mechanism via an input interface (not shown). A stepping motor 50 for swinging, a stepping motor 60 for swinging the needle, an operation pedal 10 for adjusting the rotational speed of the sewing machine motor 7, an operation panel 11 for inputting various settings, and the like.

  The operation pedal 10 outputs a signal corresponding to the amount of depression, and the control device 8 rotationally drives the sewing machine motor 7 at a rotation speed corresponding to the signal output. The sewing machine motor 7 is connected to the control device 8 via its power supply output circuit, and the rotational speed can be controlled by controlling the drive current value of the circuit.

  The needle swinging stepping motor 60 is driven and controlled by the control device 8 in synchronization with a predetermined timing with respect to the needle drop timing recognized from the output of the encoder 32, and the sewing needle 6 is moved to a predetermined needle drop position by the needle swing. Position.

  As shown in FIG. 7, the operation panel 11 as an operation means includes a setting input switch for various setting data related to sewing, and has a correction input unit 11 a capable of inputting correction related to the cloth feed amount. In addition, the operation panel 11 a includes a stitch selection unit 11 c as a selection unit that selects at least one stitch information 104 of the sewing pattern information 101. In the present embodiment, the stitch information 104 having a common feed amount in the sewing pattern is selected at a time. As shown in FIG. 8, the correction input unit 11a of the operation panel 11 includes a selection input unit 11b that selects whether or not to correct the cloth feed amount by a correction control program 103 described later. In the present embodiment, the operation panel 11 is a so-called touch panel type, and various input buttons are switched and displayed. In the present embodiment, the user can also input desired sewing pattern information 101 using the operation panel 11.

  As shown in FIG. 8, the ROM 82 as the storage means stores the cloth feed amount for each stitch in the sewing pattern formed by inserting the sewing needle 6 into a plurality of needle drop positions of the cloth CL, and the sewing needle 6. Sewing pattern information 101 configured by combining a plurality of stitch information 104 including the swing amount is stored in advance. In the present embodiment, the sewing pattern information 101 stored in the ROM 82 includes a T-stitch sewing pattern shown in FIG. 9, a cross-shaped sewing pattern shown in FIG. 10, a sewing pattern arbitrarily set by the user, and the like. .

  Here, as shown in FIG. 9, the T-stitch sewing pattern is based on sewing in a straight line at a predetermined interval with a needle swing amount being zero, and a predetermined amount with a feed amount being zero at a predetermined position. This is a sewing pattern in which a T-shape is formed by sewing only by swinging the needle. Specifically, the needle swing amount is set to zero, and the sewing needle 6 is inserted into the first needle drop position P1 of the cloth CL, and then the cloth is fed in the positive direction by a predetermined amount, so that the second needle drop position of the cloth CL is reached. The sewing needle 6 is inserted through P2. Thereafter, the cloth feed amount is set to zero, the needle is swung by a predetermined amount, and the sewing needle 6 is inserted into the third needle drop position P3 of the cloth CL. Next, the cloth feed amount is set to zero, and the needle is swung so that the needle swing amount becomes zero, and the sewing needle 6 is inserted into the fourth needle drop position P4 of the cloth CL. That is, in the T-shaped stitch, the second needle drop position P2 and the fourth needle drop position P4 are substantially the same in calculation.

  Here, as in the case of the T stitch, the cross-shaped sewing pattern is basically sewn in a straight line at a predetermined interval with the needle swing amount being zero, and the first to fourth needle drop positions P1, P2 are used. , P3, and P4, the sewing needle 6 is inserted. In the case of a cross-shaped sewing pattern, as shown in FIG. 10, the cloth feed amount is set to zero from the fourth needle drop position P4, and the needle CL is swung to the opposite side to the third needle drop position P3. The sewing needle 6 is inserted into the fifth needle drop position P5. Next, the cloth feed amount is set to zero, the needle is swung so that the needle swing amount becomes zero, and the sewing needle 6 is inserted into the sixth needle drop position P6 of the cloth CL. That is, in the case of a cross-shaped sewing pattern, the second needle drop position P2, the fourth needle drop position P4, and the sixth needle drop position P6 are substantially the same in calculation.

  The ROM 82 stores a sewing control program 102 for controlling the feed amount adjusting mechanism and the needle swinging mechanism based on a plurality of sewing pattern information 101 when an operation is input on the operation panel 11. That is, in this embodiment, the control device 8 constitutes a sewing control means. The sewing control program 102 has a correction control program 103 that controls the feed amount adjusting mechanism by correcting the cloth feed amount based on the correction input in the correction input unit 11a. That is, in the present embodiment, the control device 8 constitutes a correction control unit. In the present embodiment, the correction control program 103 corrects the cloth feed amount designated by the correction input unit 11a among the plurality of stitch feed amounts for each stitch in each sewing pattern.

  A sewing state by the sewing machine 1 configured as described above will be described. 9A and 10A show the sewing state when the feed amount is not corrected by the selection input unit 11b of the operation panel 11. FIG. As shown in FIG. 9A, in the case of the T-shaped stitch, the feed mechanism and the feed amount adjusting mechanism are set so that the feed amount becomes zero from the second needle drop position P2 to the fourth needle drop position P4. In spite of being controlled, the cloth CL is actually sent in the forward direction. As shown in FIG. 10A, even when sewing in a cross shape, the feed mechanism and the feed amount are set so that the cloth feed amount becomes zero between the second needle drop position P2 and the sixth needle drop position P6. Although the adjustment mechanism is controlled, the cloth CL is actually sent in the forward direction. That is, visually, the T-shape and the cross are not sewn.

  As described above, in the sewing machine 1 of the present embodiment, the cloth feed amount and the like can be adjusted, which is convenient, but the power transmission path such as the feed mechanism and the feed amount adjustment mechanism is long, and friction is used for power transmission. Therefore, the actual cloth feed amount differs from the calculated cloth feed amount due to backlash or slippage of each mechanism.

  Next, FIG. 9B and FIG. 10B show the sewing state when the cloth feed amount is corrected by the selection input unit 11b of the operation panel 11. FIG. As for the correction amount of the cloth feed amount, the operator repeats visual recognition, input, and trial sewing, and specifies the stitch information 104 with the feed amount of zero on the correction input portion 11a of the operation panel 11 so that there is an error corresponding to the error. It is input by the sewing manufacturer so as to correct in the direction opposite to the direction in which the occurrence occurs. As a result, as shown in FIGS. 9B and 10B, the thread shape after sewing is visually equal to the intended state. For sewing patterns that are stored in the ROM 82 in advance, such as the T stitch and the cross stitch, and that can be assumed to be corrected, when the start of correction is selected, the stitch selection unit 11c automatically Alternatively, the portion may be selected as a stitch to be corrected.

  FIG. 11 shows a sewing pattern in which the user arbitrarily sets the cloth feed amount. In this sewing pattern, the cloth feed amount for each stitch is 0.5 mm, 1.0 mm, 1.5 mm, 2.0 mm, or 2.5 mm. In the present embodiment, the user can specify the cloth feed amount to be corrected. That is, for example, as shown in FIG. 11, the arbitrary correction amount can be increased or decreased only when the sewing pattern has a cloth feed amount of 2.0 mm. Here, if 2.0 mm is designated in the correction input unit 11a, the stitch information 104 having a feed amount of 2.0 mm in the sewing pattern can be selected and corrected at once. .

  As described above, according to the sewing machine 1 of the present embodiment, correction input relating to the cloth feed amount can be performed for each sewing pattern information 101 from the correction input unit 12a of the operation panel 11. Thus, when an error occurs between the calculated feed amount of the cloth CL and the actual feed amount of the cloth CL in the feed mechanism, the feed amount adjustment mechanism, etc., the sewing manufacturer can send the cloth feed according to the error. The amount can be corrected. That is, even if the power transmission path of the feed mechanism, the feed amount adjusting mechanism, etc. is long and friction is used for power transmission as in this embodiment, even if the feed amount is likely to have an error, the desired amount The feed amount can be accurately corrected so as to be in the sewing state.

  Further, according to the sewing machine 1 of the present embodiment, the stitch information 104 having a common feed amount is selected at once, and these stitches are corrected at once. As a result, it is possible to select and correct only the stitches of the cloth feed amount at which the finish after sewing is particularly deteriorated. Can be simple. That is, it is extremely advantageous when it is only necessary to select and correct only the stitches having a feed amount of zero as in the case of sewing in a T shape or a cross shape.

In the above-described embodiment, the cloth feed direction is basically the forward direction in each sewing pattern. However, the sewing pattern may be a combination of the forward direction and the reverse direction as the cloth feed direction. Of course. In this case, the correction control program 103 may correct the cloth feed amount independently for the forward direction and the reverse direction even if the cloth feed amount is the same.
That is, even if the cloth feed amount is the same in the forward direction and the reverse direction, the cloth is fed in the forward direction and in the reverse direction depending on the case where the cloth is not sent out by the same power transmission mechanism or the state of the cloth. The feed amount error may be different. In some cases, the sewing pattern requires accuracy only in any one direction. In such a case, since the correction is performed independently in the forward direction and the reverse direction with different errors, it is possible to finely adjust the feed amount corresponding to each direction.
Further, the stitch information 104 in the sewing pattern may be collectively selected by the stitch selection unit 11c in the forward / reverse direction of the feed direction. Thus, it is possible to input the correction in the forward direction or the reverse direction once without inputting the correction amount of the feed amount for each stitch, and the burden on the sewing manufacturer can be reduced. In addition, it is possible to effectively correct the sewing pattern in which the error is greatly different between the normal direction and the reverse direction.

  In the above-described embodiment, the cloth feed amount is specified and corrected for each sewing pattern. However, the correction control program 103 collects one stitch at a time for at least one piece of the sewing pattern information 101. A batch correction program for correcting each cloth feed amount may be provided. In this case, the CPU 81 and the ROM 82 serve as a collective correction unit. Furthermore, the cloth feed amount may be collectively corrected for all of the sewing pattern information 101 stored in the ROM 82.

  In addition, even if the feed mechanism and the feed amount adjusting mechanism in the above embodiment have other conventionally known configurations, the same effects as those in the above embodiment can be obtained. Of course, it can be changed appropriately.

1 shows an embodiment of the present invention and is a schematic diagram for explaining the overall configuration of a sewing machine. It is sectional drawing of the II-II part of FIG. It is sectional drawing of the III-III part of FIG. It is explanatory drawing for demonstrating a feed amount adjustment mechanism. It is explanatory drawing for demonstrating a needle swing mechanism. It is a schematic block diagram showing a control system of the sewing machine. It is the figure which showed an example of the display screen of an operation panel. It is a schematic block diagram of ROM. FIG. 5 is a diagram showing a sewing state by a sewing machine, where (a) shows a sewing control without correcting the cloth feed amount, and (b) shows a sewing control with a cloth feed amount corrected. FIG. 5 is a diagram showing a sewing state by a sewing machine, where (a) shows a sewing control without correcting the cloth feed amount, and (b) shows a sewing control with a cloth feed amount corrected. It is a figure showing the sewing state by a sewing machine, and is a figure which controlled sewing based on the sewing pattern arbitrarily set by the user.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Sewing machine 6 Sewing needle 7 Sewing machine motor 8 Control device 11 Operation panel 11a Correction input part 11b Selection input part 11c Seam selection part 12a Upper shaft 12b Lower shaft 13 Feed dog 20 Feeding electric mechanism 50 Feeding stepping motor 60 Needle swinging stepping motor 81 CPU
82 ROM
83 RAM
101 Sewing pattern information 102 Sewing control program 103 Correction control program 104 Stitch information CL Cloth P1 First needle drop position P2 Second needle drop position P3 Third needle drop position P4 Fourth needle drop position P5 Fifth needle drop position P6 Sixth Needle entry position

Claims (5)

A needle up-and-down movement mechanism for moving the sewing needle up and down;
A feed mechanism for performing a feed operation of the sewing product in synchronization with the needle vertical movement mechanism;
A feed amount adjusting mechanism capable of adjusting a feed amount per cycle of the vertical movement of the sewing needle in the feed mechanism;
A needle swing mechanism capable of adjusting a swing amount of the sewing needle in a direction substantially orthogonal to a feed direction by the feed mechanism;
Storage means for previously storing sewing pattern information configured by combining a plurality of stitch information including the feed amount for each stitch through which the sewing needle is inserted into the sewing product and the swing amount of the sewing needle;
In a sewing machine comprising sewing control means for controlling the feed amount adjustment mechanism and the needle swing mechanism based on the sewing pattern information stored in the storage means,
An operation means comprising: a selection means for selecting at least one stitch information of the sewing pattern information; and a correction input means capable of performing a correction input related to the feed amount;
The sewing control means includes correction control means for correcting the feed amount of the stitch information selected by the selection means based on a correction input in the correction input unit and controlling the feed amount adjusting mechanism. Sewing machine. The feed amount adjusting mechanism is configured to be capable of changing the feed direction of the sewing product between a normal direction that is a steady feed direction of the sewing product and a reverse direction opposite to the normal direction.
The sewing machine according to claim 1, wherein the stitch selection means selects stitch information in a sewing pattern in a batch according to whether the feed direction is normal or reverse.   The sewing machine according to claim 2, wherein the correction control unit independently corrects the feed amount when the feed amount of each stitch information is in the forward direction and in the reverse direction.   The sewing machine according to any one of claims 1 to 3, wherein the stitch selection means collectively selects stitch information having a common feed amount in a sewing pattern.   The sewing machine according to any one of claims 1 to 4, wherein the correction input unit includes a selection input unit that selects whether or not to correct the feed amount by the correction control unit.

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