JP5040212B2 - Sewing machine and sewing program - Google Patents

Description

  BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sewing machine and a sewing machine program. More specifically, the present invention relates to a sewing machine that prevents intermittent lifting of a work cloth when a sewing needle is raised with respect to a sewing target cloth, and a sewing machine program used for the sewing machine. .

  Conventionally, when a stitch is formed on a sewing object cloth, an intermittent presser driving device that moves the intermittent presser up and down in synchronization with the vertical movement of the needle bar so that the sewing target cloth can be prevented from lifting when the sewing needle is raised. Sewing machines equipped with are known.

When sewing with such a sewing machine, it is desirable to set the position of the intermittent presser appropriately when the thickness of the sewing object cloth changes. Therefore, for example, there is proposed a sewing machine presser device in which, when the thickness of the sewing object cloth changes, the switching means is operated according to the cloth pressure, and the region of the operating stroke of the presser foot by the operating means is changed. (See Patent Document 1). According to the sewing machine presser device, since a constant spring pressure is always applied regardless of the change in the cloth pressure of the sewing object cloth, it is possible to form a seam with a good thread tightness.
JP-A 63-11192

  However, in the above-described conventional sewing machine presser device, when sewing is started by the sewing machine, the intermittent presser setting position is moved to the default use position regardless of the thickness of the cloth to be sewn. When the default use position is lower than the thickness of the cloth to be sewn, there is a problem that the intermittent presser strongly presses the cloth to be sewn and may damage the cloth to be sewn. If the intermittent presser foot setting position is set to an appropriate height after starting sewing after the fabric to be sewn has been pressed, the fabric will flutter as much as the fabric is pressed to form stitches. There was a problem of adverse effects.

  The present invention has been made to solve the above-described problems, and an object of the present invention is to provide a sewing machine and a sewing machine program for setting an intermittent presser for pressing a cloth to be sewn to an appropriate setting position.

In order to solve the above-described problem, a sewing machine according to a first aspect of the present invention provides an intermittent presser that presses a cloth to be sewn in conjunction with a vertical movement of a needle bar of the sewing machine, and a position where the intermittent presser is set, In a sewing machine including a use position to be pressed and a switching mechanism that switches to a standby position above the use position, stitch data that indicates a needle drop point for forming a stitch on the sewing target cloth, and Sewing data storage means for storing sewing data including at least intermittent presser data indicating the height of the use position of the intermittent presser, and the switching mechanism switches the position of the intermittent presser from the standby position to the use position. Before, the reading means for sequentially reading the sewing data stored in the sewing data storage means, and the sewing order included in the sewing data read by the reading means is the first Sewing data determining means for determining whether or not the height of the use position of the intermittent presser at the time of sewing based on the stitch data is indicated by the intermittent presser data included in the sewing data; and the sewing data When the determination means determines that the height of the use position of the intermittent presser is indicated by the intermittent presser data, the switching mechanism is driven to set the intermittent presser set position to the standby position. From the intermittent presser position control means for switching to the use position at the height indicated by the intermittent presser data, and the intermittent presser position control means, the set position of the intermittent presser is indicated by the intermittent presser data. The sewing start hand that starts sewing on the sewing target cloth when a sewing start instruction is received after the height is switched to the use position. It is equipped with a door.

  According to the sewing machine of the invention according to claim 2, in addition to the configuration of the invention of claim 1, the sewing data determination means is configured such that the sewing machine is temporarily stopped and the set position of the intermittent presser is set to the use position. The sewing position includes the height of the use position of the intermittent presser when sewing is performed based on the stitch data included in the next sewing data whose sewing order is changed to the standby position. It is determined whether or not an instruction is given by intermittent presser data.

  Further, according to the sewing machine of the invention according to claim 3, in addition to the configuration of the invention of claim 1 or 2, the sewing machine further comprises default value storage means for storing a default value of the use position of the intermittent presser, and the intermittent The presser position control unit drives the switching mechanism when the sewing data determination unit determines that the height of the use position of the intermittent presser is instructed by the intermittent presser data. The set position of the presser is switched from the standby position to the use position at the height indicated by the intermittent presser data, and the sewing data determining means determines that the height of the use position of the intermittent presser is the intermittent presser. When it is determined that the presser data is not instructed, the switching mechanism is driven, and the setting position of the intermittent presser is changed from the standby position to the default value storage means. To switch to the stored said height position of use indicated by the default value, characterized in.

  According to a sewing machine program of a fourth aspect of the invention, the computer is caused to function as various processing means of the sewing machine according to any one of the first to third aspects.

  According to the sewing machine of the first aspect of the present invention, when it is determined that the height of the use position of the intermittent presser is indicated by the intermittent presser data, the switching mechanism is driven and set to the standby position. The set position of the intermittent presser is set to a use position of an appropriate height indicated by the intermittent presser data. For this reason, when the intermittent presser presses the cloth to be sewn strongly at the start of sewing and damages the cloth to be sewn, or when the intermittent presser moves the intermittent presser to the appropriate use position from the state where the presser foot is strongly pressed. It can be avoided that the fabric flutters and adversely affects the formation of the seam.

  Further, according to the sewing machine of the invention according to claim 2, in addition to the effect of the invention of claim 1, the use position of the intermittent presser also when sewing by the sewing machine is temporarily stopped and then sewing is resumed. If it is determined that the height of the presser foot is instructed by the intermittent presser data, the switching mechanism is driven, and the intermittent presser set position set to the standby position is set to an appropriate value indicated by the intermittent presser data. It can be automatically set to the height use position. For this reason, when the sewing machine is temporarily stopped and then sewing is resumed, the intermittent presser presses the sewing target cloth strongly, and the sewing target cloth is damaged or the intermittent presser presses the sewing target cloth strongly. When the intermittent presser is moved to a proper use position, it can be avoided that the fabric flutters and adversely affects the formation of the seam.

  Further, according to the sewing machine of the invention of claim 3, in addition to the effect of the invention of claim 1 or 2, it is determined that the height of the use position of the intermittent presser is not indicated by the intermittent presser data. In this case, the switching mechanism is driven so that the setting position of the intermittent presser is set to the use position at the height indicated by the default value. Therefore, the intermittent presser setting position can be automatically set to an appropriate position depending on whether or not the intermittent presser setting position is indicated by the intermittent presser data.

  In addition, according to the sewing machine program of the invention according to claim 4, by causing the computer to execute it, it is possible to achieve the operational effects of the sewing machine according to any one of claims 1 to 3 as various processing means. Therefore, the sewing machine according to any one of claims 1 to 3 can be configured by using a computer, and the same effect as that of the sewing machine can be obtained.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the present embodiment, the sewing target cloth is moved relative to the needle that moves up and down to form stitches on the work cloth, and the electronic bar-tacking sewing machine 1 (hereinafter simply referred to as “sewing machine 1”) including the intermittent presser 5 This is an example in which the present invention is applied.

  First, the physical configuration of the sewing machine 1 will be described with reference to FIGS. FIG. 1 is a perspective view of a sewing machine 1 according to an embodiment of the present invention. 2 is a left side view of the sewing machine 1, and FIG. 3 is a right side view of the intermittent motion interlocking means 60 provided in the sewing machine 1. As shown in FIG. 1 are referred to as “front side of the sewing machine 1” and “front side of the sewing machine 1”, and the depth side of the paper is referred to as “back side of the sewing machine 1” and “back side of the sewing machine 1”. In FIG. 1, the left-right direction on the paper surface is the left-right direction.

  A sewing machine 1 shown in FIG. 1 includes a sewing machine bed 3 that is long in the front-rear direction, a leg column 11 that is erected upward from the right end of the sewing bed 3, and an upper end of the leg column 11 to the left in FIG. The arm 13 extends, the intermittent presser bar 18 provided with the intermittent presser 5 at the lower end, and the head part 12 containing the needle bar 15 provided with the sewing needle 14 at the lower end are provided. .

  Further, the sewing machine 1 is disposed on the right side surface (the rear end portion of the sewing machine body 10) of the pedestal 11 in FIG. 1, sets the reference position of the use position of the intermittent presser 5 and moves the intermittent presser 5 up and down with variable speed. An intermittent presser vertical drive device 20 to be moved is provided. Further, below the arm portion 13, there is provided an outer presser device 40 that sandwiches and presses the sewing target cloth 2 with the outer presser 41 and horizontally moves the sewing target cloth 2 with respect to the sewing needle 14. Further, the head portion 12 includes an intermittent motion interlocking means 60 that is driven in conjunction with the vertical movement for sewing the sewing needle 14 to intermittently move the intermittent presser 5. Hereinafter, the intermittent presser vertical drive device 20, the outer presser device 40, and the intermittent motion interlocking means 60 included in the sewing machine 1 will be described in detail.

  First, the intermittent presser vertical drive device 20 will be described with reference to FIG. The intermittent presser up / down drive device 20 corresponds to the switching mechanism of the present invention, and sets the reference position of the use position of the intermittent presser 5 to a position indicated by sewing data or a default set value, and the intermittent presser. 5 is switched between the use position and the standby position. Here, the reference position of the use position of the intermittent presser 5 refers to a lower limit position when the intermittent presser 5 moves up and down in synchronization with the needle bar 15 during sewing. The intermittent presser vertical drive device 20 includes an intermittent presser 5 provided at the tip of the intermittent presser bar 18, a cam mechanism 21 provided on the right side surface of the pedestal 11, and a vertical movement of the intermittent presser 5 and the cam. A driving means 35 including an intermittent presser pulse motor 30 for applying a rotational driving force to the mechanism 21 is provided.

  The cam mechanism 21 provided in the intermittent presser vertical drive device 20 has a substantially elliptical front shape that is externally fitted to an output shaft 31 that rotates according to the rotation of the pulse motor 30 for intermittent presser, and that is cut out of a circle. An intermittent presser cam 22 that changes the rotational driving force of the presser pulse motor 30 to move the intermittent presser 5 up and down, and a circular front shape. The lower part of the circle is in contact with the outer periphery of the intermittent presser cam 22. A follower 23 that moves following the cam curve of the intermittent presser cam 22 and an L-shaped plate having the follower 23 at one end and having a predetermined thickness, provided at the bending point. And a cam lever 24 that rotates around 36. Further, the cam connecting rod 25 is connected to the other end of the cam lever 24 and extends in parallel with the arm portion 13 from the right side surface of the pedestal column portion 11 to the head portion 12 side, and rotates around a predetermined fulcrum. The cam lever 26 has one end connected to the cam connecting rod 25 and the other end interlockingly engaged with a single support link plate 71 constituting the intermittent motion interlocking means 60.

  On the other hand, the intermittent presser pulse motor 30 provided on the right side surface of the pedestal 11 in FIG. 1 generates a rotational driving force by electricity, and the rotation per unit time is controlled by controlling the pulse applied to the motor. The rotation speed, rotation angle, and rotation direction of normal rotation and reverse rotation are controlled with high accuracy. An encoder 32 that reads the rotation angle of the output shaft 31 is installed on the back side of the intermittent presser pulse motor 30, and feedback control is performed based on this data to improve the control accuracy.

  Thus, since the intermittent presser vertical drive device 20 uses the combination of the cam mechanism 21 and the intermittent presser pulse motor 30 as the drive means 35, the reference position of the use position required for the drive means 35 is set. It is possible to preferably realize the requirement to determine. Further, since the driving means 35 is provided outside the pedestal 11, it is possible not to apply an extra load to the head part 12, and for maintenance of the driving means 35, only the cover of this part is attached and detached. It will be easy and maintenance will be easier.

  Next, the outer presser device 40 will be described with reference to FIG. The outer presser device 40 provided at the lower portion of the arm portion 13 is for holding the sewing target cloth 2 and moving it horizontally. In addition to the outer presser 41 which is a frame having a substantially rectangular planar shape, As a mechanism for raising and lowering the outer presser 41, an outer presser cam 43 having a substantially elliptical front shape provided with a convex part with a circle cut off provided on the right side surface of the pedestal 11, and a rectangular planar shape A plate-like member having an outer presser pressing plate 49 supported by a lower portion of the arm portion 13 so as to be parallel to the sewing machine bed 3 and moving up and down by the vertical pressing cam 43. On the other hand, as a mechanism to be pressed from the outer presser pressing plate 49, a leg column part 56 standing upward from the sewing machine bed 3 and a fulcrum 58 provided at an upper right part of the leg column part 56. One end of the arm is rotatably supported, and the other end of the arm is provided with a surface parallel to the sewing machine bed 3 that abuts the outer presser pressing plate 49, and a press receiver 51 that receives the pressing force of the outer presser pressing plate 49 by the surface. And. Further, in conjunction with the seesaw movement in which the press receiver 51 moves up and down around the fulcrum 58 according to the pressing by the outer presser pressing plate 49, the seesaw movement is performed around the fulcrum 57 provided at the lower part of the fulcrum 58, A pair of press transmission plates 52 extending from the pedestal column portion 56 toward the outer presser 41 is provided to move the outer presser 41 up and down at the tip. Furthermore, while supporting the press receiver 51 and the press transmission plate 52 so that the seesaw can move, an outer presser support 54 that guides the outer presser 41 to move up and down while maintaining the level of the presser surface, and a base of the support 54. And a lower plate 55 which receives the sewing target cloth 2 to be sewn from below.

  The link for transmitting the vertical movement from the outer presser cam 43 to the outer presser pressing plate 49 is made of a plate having a circular front shape having a predetermined thickness, being in contact with the outer peripheral portion of the outer presser cam 43 and being driven. A follower 44, a cam lever 45 that is provided at the lower end, rotates around the same fulcrum 36 as the cam mechanism 21 of the intermittent presser vertical drive device 20, and is an L-shaped plate having a predetermined thickness; A cam connecting rod 46 is provided which is connected to the other end of the cam lever 45 and extends in parallel with the arm portion 13 from the right side surface of the columnar portion 11 to the head portion 12 side. Further, the cam lever is made of an L-shaped plate that rotates around a predetermined fulcrum, has one end connected to one end of the cam connecting rod 46 on the head portion 12 side, and the other end connected to the outer presser pressing plate 49. 47 and a spring 48 for biasing the cam connecting rod 46 connecting side of the cam lever 47 to the connecting side. The spring 48 urges the follower 44 to always contact the outer periphery of the intermittent pressing cam 43 and to follow the cam curve.

  The outer presser cam 43, the outer presser pressing plate 49, and the link-related parts from the outer presser cam 43 to the outer presser pressing plate 49 are installed on the sewing machine body 10 side or inside thereof, and are installed horizontally. It does not move. On the other hand, the press receiver 51, the press transmission plate 52, the support body 54, and the lower plate 55 on the outer presser 41 side move in the horizontal direction with respect to the sewing needle 14 being sewn. This moving range is a range inside a window 42 having a substantially rectangular planar shape in which a sewing portion of the sewing target cloth 2 provided on the outer presser 41 is exposed to the sewing needle 14.

  In this way, the outer presser pressing plate 49 is transmitted to the pressing receiver 51 on the side of the outer presser 41 that moves horizontally from the outer presser pressing plate 49 that is fixed and does not move horizontally, regardless of the horizontal movement of the pressing receiver 51. The size of the press receiver 51 covers a range in which the press receiver 51 moves horizontally. Although not shown here, the lower plate 55 is also provided with a window having a substantially rectangular planar shape corresponding to the window 42 of the outer presser 41 so that the sewing needle 14 can penetrate the sewing object cloth 2 to be sewn. It has become.

  In addition, a tension spring 53 that biases the outer presser 41 in the direction of raising the outer presser 41 is provided on the side of the leg column portion 56 of the press transmission plate 52. Therefore, when the pressing force of the outer presser pressing plate 49 does not act on the press receiver 51, the outer presser 41 rises and the nipped sewing object cloth 2 is released.

  Next, the intermittent motion interlocking means 60 will be described with reference to FIGS. The intermittent movement interlocking means 60 intermittently moves the intermittent presser 5 in synchronism with the operation of the needle bar 15 at a predetermined height from the reference position of the use position set by the intermittent presser vertical drive device 20 at the time of sewing. is there. The intermittent motion interlocking means 60 has a substantially circular side surface shape fitted to the sewing machine needle drive shaft 19 and a plate-shaped eccentric cam 62 having a rotation shaft at a position away from the center, and the eccentric cam. A cylindrical rolling bearing 61 that transmits only the eccentric motion 62 but does not transmit rotation, a cylindrical ring 63 with an arm fitted on the rolling bearing 61, and an arm tip 64 of the ring 63 with the arm are fixed in position. It is provided with a substantially elliptical long hole 67 that is vertically connected to be rotatable. Further, an adjustment connecting arm 65 that rotates around the fixed rotation shaft 66 and a transmission arm 68 that is a vertically long plate member attached to the fixed rotation shaft 66 on the head portion 12 side of the adjustment connection arm 65 are provided. . Further, the vertical movement from the intermittent presser cam 22 is transmitted, and the cam lever 26 connected to the lower end of the single support link plate 71 and the single support link plate 71 constituting the intermittent motion interlocking means 60 are interlocked and engaged. A joining piece 73 (see FIG. 3) is provided.

  The transmission arm 68 further includes a link plate 69 which is a plate-like member having a predetermined thickness and extending in the front-rear direction, and a plate-like member having a predetermined thickness and an L-shaped side shape. L-shaped link plate 70, a single-support link plate 71 that is a plate-like member having a predetermined thickness and extending in the front-rear direction, and a plate-like member having a predetermined thickness and extending in the vertical direction The vertical link plates 72 as members are connected so as to form links in this order, and the end portions of the vertical link plates 72 are connected to the intermittent presser bar 18 that can be slid up and down.

  Further, the engagement piece 73 (see FIG. 3) provided on the right side surface of the piece support link plate 71 is supported by the tip of the cam lever 26 at the lower part of the projecting piece so that the piece support link plate 71 does not tilt downward. I have to. A compression spring 16 that urges the presser bar 18 downward is externally attached to an upper part of the intermittent presser bar 18, and an adjustment screw that adjusts the urging force of the compression spring 16 from the upper side of the sewing machine body 10. 17 is provided. As will be described later, the compression spring 16 applies an urging force that urges the follower 23 so as to always contact the intermittent pressing cam 22 with respect to the intermittent pressing cam 22.

  As shown in FIG. 2, the intermittent motion interlocking means 60 provided in the head portion 12 includes a transmission arm 68, a link plate 69, an L-shaped link plate 70, a single support link plate 71, which are the plate-shaped members described above, and A link is formed by the vertical link plate 72. Of the nodes of each link portion, seven nodes, that is, the node 80 of the fixed rotating shaft 66 provided on the upper portion of the transmission arm 68 and the lower end of the transmission arm 68 are provided. Node 81 between the link plate 69 and the rear end of the link plate 69, a node 82 between the front end of the link plate 69 and the upper end of the L-shaped link plate 70, and the other end of the L-shaped link plate 70. And a node 83 at the upper end of the vertical link plate 72 extending vertically, a fixed node 84 at the end on the back side of the single support link plate 71, and a front end that is a free end of the single support link plate 71 Node 85 with the bent part of L-shaped link plate 70, vertical link plate The node 86 between 2 and intermittent presser bar 18 will be described with reference to FIG.

  Nodes 80 and 84 indicated by black circles in FIG. 2 are nodes that do not move in position, and only allow rotation about the nodes 80 and 84 in a fixed state. In FIG. 2, a node 85 indicated by a black triangle is a node that does not move during intermittent movement linked to the vertical movement of the sewing needle 14. When adjusting the reference position of the use position of this intermittent movement. The position moves. A node 86 indicated by a black arrow in the vertical direction is a movement of the intermittent presser bar 18 and can be moved only in the vertical direction, but other movements are restricted.

  With this configuration, the intermittent motion interlocking means 60 rotates the eccentric cam 62 by the rotational drive of the sewing machine needle drive shaft 19, and only the eccentric motion of the eccentric cam 62 is caused by the rolling bearing 61 to swing the ring 63 with the arm. The swing is transmitted to the adjustment coupling arm 65 through the arm tip 64 of the armed ring 63 and the elongated hole 67 of the adjustment coupling arm 65, and the same fixed shaft (node 80) is synchronized with this. ) The upper transmission arm 68 swings.

  The swing of the transmission arm 68 around the node 80 swings the link plate 69, and the swing causes the L-shaped link plate 70 to swing around the node 85 via the node 82. Further, this swinging causes the vertical link plate 72 to swing substantially up and down via the node 83, and this swinging causes the node 86 to move up and down, so that the intermittent presser bar 18 and the intermittent presser 5 are in the use position. Intermittent movement is performed within a predetermined height range from the reference position.

  At this time, the single-support link plate 71 that can rotate around the fixed node 84 does not swing due to the intermittent motion. This is because the unilateral support link plate 71 has a biasing force applied to the intermittent presser bar 18 via the free end node 85, the L-shaped link plate 70 and its node 83, and the vertical link plate 72 and its node 86. This is because the lower limit thereof is regulated by the interlocking engagement between the engagement piece 73 provided on the right side surface of the above-described piece support link plate 71 and the cam lever 26.

  The downward urging force to the engagement piece 73 finally reaches the follower 23 driven by the intermittent presser cam 22 that causes the swing of the cam lever 26 via the cam lever 26. In addition, the follower 23 is a biasing force that biases the follower 23 so as to always contact the outer periphery of the intermittent presser cam 22.

  The inclination of the one-side support link plate 71 is changed when the tip of the cam lever 26 is adjusted by the intermittent presser vertical drive device 20 to adjust the height of the reference position of the use position against the biasing force. The node 85, which is the free end of the single support link plate 71, moves up and down. Accordingly, the height of the use position is not affected without affecting the intermittent movement of the intermittent presser 5 accompanying the vertical movement of the sewing needle 14. And the reference position of the use position that becomes the lower limit position of the intermittent movement can be adjusted.

  By such a mechanism, the intermittent movement interlocking means 60 is driven in conjunction with the vertical movement for sewing of the sewing needle 14 without interfering with the use position and the standby position of the intermittent presser 5 and intermittently presses the intermittent presser 5. Can be moved.

  Next, a method for adjusting the stroke of the intermittent movement of the intermittent presser 5 interlocked with the vertical movement of the sewing needle 14 using the intermittent movement interlocking means 60 will be described. It is the ring 63 with the arm and the adjustment connecting arm 65 that adjust the stroke.

  The swinging stroke of the ring 63 with arm itself is synchronized with the vertical movement of the sewing needle 14 and is always constant. On the other hand, the connection position where the arm tip 64 of the ring 63 with the arm is connected to the elongated hole 67 of the adjustment connection arm 65 is changed, that is, the connection position is farther from the fixed rotation shaft 66 of the adjustment connection arm 65. Then, the swing stroke at the connecting position corresponding to the swing stroke of the ring 63 with the arm does not change, but the swing angle around the fixed shaft (node 80) of the adjustment connecting arm 65 itself becomes small. On the contrary, when this connection position is made closer, the swing angle around the fixed axis (node 80) of the adjustment connection arm 65 itself increases.

  Thus, the swing angle around the fixed shaft (node 80) of the adjustment connecting arm 65 can be adjusted with respect to the swing stroke of the ring 63 with arm, that is, the vertical movement stroke of the sewing needle 14. Thus, the swinging end of the transmission arm 68, that is, the swinging stroke of the node 81 can be adjusted. As a result, the stroke of the intermittent movement of the intermittent presser 5 can be adjusted.

  With such a configuration, the intermittent presser vertical drive device 20 in the sewing machine 1 can maintain a single position setting for vertical movement including intermittent movement at the use position of the intermittent presser 5 and movement to the standby position, and the speed can be changed. This can be performed by the drive means 35, and it is not necessary to provide a dedicated drive means for switching between the use position and the standby position, and automation of the apparatus can be performed more uniformly.

  Next, the electrical configuration of the sewing machine 1 will be described with reference to FIG. FIG. 4 is a conceptual diagram showing an electrical configuration of the sewing machine 1. As shown in FIG. 4, the control unit 130 of the sewing machine 1 includes a CPU 133, a ROM 134, a RAM 132, an input interface 131 and an output interface 135, and the input interface 131 and the output interface 135 are connected to the CPU 133 by a bus 136. ing. In addition, the input interface 131 includes setting positions of an operation panel 120 for instructing selection of various sewing parameters such as setting of various sewing parameters and sewing speed, a programmer 121 for generating sewing data, and an intermittent presser 5. An intermittent presser pedal 122 for instructing and a start pedal 123 for instructing the start of sewing are connected. In addition, the output interface 135 horizontally moves the sewing target cloth 2 held between the driving circuit 140 and the outer presser 40 that drives the sewing machine motor 143 that reciprocates the needle bar 15 in the vertical direction in the left-right direction or the front-rear direction. A drive circuit 141 for driving the XY feed pulse motor 144 and a drive circuit 142 for driving the intermittent press pulse motor 30 for moving the installation position of the intermittent presser 5 are connected. Hereinafter, the programmer 121 connected to the control unit 130, the CPU 133, the ROM 134, and the RAM 132 constituting the control unit 130 will be described in detail.

  The programmer 121 is a device that creates sewing data for forming stitches on the sewing target cloth. By operating a numeric keypad and function keys provided in the programmer 121, sewing data of a desired pattern such as a pattern can be created. It is like that. The sewing data may be stored in the ROM 134 in advance or stored in an external storage device such as a memory card in addition to the case where the sewing data is produced by the programmer 121. In this case, the sewing data is stored in the RAM 132. Should be read.

  The CPU 133 performs main control of the sewing machine 1 and executes various calculations and processes for executing sewing in accordance with the sewing control program stored in the ROM 134. Further, various calculations and processes for setting the reference position of the use position of the intermittent presser 5 are executed according to the sewing machine program according to the present invention stored in the ROM 134. The sewing machine program may be stored in an external storage device such as a memory card. In that case, the program is read onto the RAM 132 and executed.

  The ROM 134 drives and controls various drive mechanisms, and in addition to a sewing control program storage area in which a sewing control program including pattern selection control for selecting various patterns and various display controls is stored, a program unique to the application described later. And a sewing machine program storage area in which a sewing machine program for setting a reference position of the use position of the intermittent presser vertical drive device 20 is stored. The ROM 134 stores various types of sewing information data, which will be described later, including a plurality of types of sewing data and various types of data corresponding to the pattern data.

  The RAM 132 is an arbitrarily readable / writable storage element, and is provided with various storage areas for storing various sewing data read from the ROM 134 and calculation results calculated by the CPU 133 as needed.

  Next, using the sewing machine 1 configured as described above, a case in which the sewing object cloth 150 shown in FIG. 5 is sewed according to the sewing data 180 shown in FIG. The description will be given with reference. FIG. 5 is an explanatory diagram for explaining the sewing target cloth 150 according to the first specific example and the stitches 171, 173, 176, and 177 formed on the sewing target cloth 150. FIG. 6 is an explanatory diagram for explaining the sewing data 180 for sewing the sewing target cloth 150 shown in FIG. 5. FIG. 7 shows a process for setting the reference position of the use position of the intermittent presser 5. It is a flowchart which shows a flow. 7 is stored in the sewing machine program storage area of the ROM 134, and is executed by the CPU 133 shown in FIG.

  First, the sewing target cloth 150 will be described with reference to FIG. As shown in FIG. 5, the sewing target cloth 150 is composed of a total of three cloths 151, 152, and 153. When the sewing target cloth 150 is set on the sewing machine 1, the cloth 151 is disposed on the sewing machine bed 3 side, the cloth 152 is disposed on the cloth 151, and the cloth 153 is disposed on the cloth 152. The thickness of each cloth is 3 mm for cloth 151, 2 mm for cloth 152, and 2 mm for cloth 153, and the thickness of the cloth to be sewn is increased in accordance with the thickness of each cloth in the overlapping part.

  Next, sewing data 180 for forming the stitch 171 on the sewing target cloth 150 will be described with reference to FIGS. 5 and 6. As shown in FIG. 6, the sewing data 180 for forming the stitches on the sewing target cloth 150 includes a rank 181 indicating the order of reading, instruction information 182 including the type and various settings of sewing data, instruction values, and the like. And consists of a total of 21 pieces of data with ranks 0 to 20. In the first specific example, the sewing data 180 includes a needle drop point of the sewing needle 14 in the X direction (+ X, −X) which is the left and right direction (front and rear direction in FIG. 1) as viewed from the user, and the front and rear as viewed from the user. 6 includes stitch data 221, 223, 226, and 227 indicated by “stitch” in FIG. 6, designated by relative coordinates composed of a Y direction (+ Y, −Y) that is a direction (left and right direction in FIG. 1). Yes. These stitch data 221, 223, 226, and 227 are sewing data corresponding to the stitches 171, 173, 176, and 177 formed on the sewing target cloth 150, respectively. The sewing data 180 includes intermittent presser data 222 and 225 indicated by “intermittent presser height” in FIG. 6, which indicates the height of the reference position of the use position of the intermittent presser 5. In addition, the sewing data 180 is instructed to temporarily stop the sewing by the sewing machine 1. The sewing data 180 is instructed to temporarily stop the sewing by the sewing machine 1. 6, end data 228 indicated by “END” is included. In the specific example 1, in order to simplify the description, the case where the sewing data 180 includes stitch data, intermittent presser data, temporary stop data, and end data has been described. Data indicating various parameters necessary for sewing, such as thread color data indicating the color of the needle and sewing speed data indicating the speed of the vertical movement of the needle bar 15 may be included.

  Next, as specific example 1, when the stitches are formed on the sewing target cloth 150 in the direction indicated by the arrow 161 shown in FIG. 5 according to the sewing data 180 shown in FIG. 6, the setting position of the intermittent presser 5 is automatically set. The processing to be set will be described with reference to the flowchart shown in FIG. In this embodiment, the height of the reference position of the use position of the intermittent presser 5 is defined by the intermittent presser data having a lower rank than the stitch data, and the intermittent presser data having a lower rank than the stitch data is stored. If not, the reference position height of the use position of the intermittent presser 5 is set to the default value 3 mm stored in the ROM 134.

  First, when the power of the sewing machine 1 is turned on by the user and sewing data is selected, a data rank counter N for sequentially reading out the sewing data is set to 0 and stored in a predetermined storage area of the RAM 132 (S10). . At this time, the intermittent presser 5 is in the standby position, there is a sufficient interval between the intermittent presser 5 and the sewing machine bed 3, and the outer presser 41 is spaced upward from the lower plate 55. In this state, the sewing target fabric 2 can be easily set on the presser device 40. Subsequently, when the intermittent presser pedal 122 is ON (S20: Yes), the height of the reference position of the use position of the intermittent presser 5 when the stitch is formed according to the first stitch data in the sewing sequence. Is set to 0 (N = 0) and stored in a predetermined storage area of the RAM 132 (S21).

  Subsequently, the RAM 132 is referred to, the sewing data of rank 0 (M = 0) is read from the sewing data 180, and it is determined that the type of the sewing data is stitch data (S22: No, S24). : Yes). As described above, when the intermittent presser data having a lower rank than the stitch data is not stored, the reference position height of the use position of the intermittent presser 5 is set to the height indicated by the default value. Therefore, it is determined that the height of the intermittent presser 5 is not instructed for the stitch data of the first rank 0 in the sewing order, and the height of the reference position of the use position of the intermittent presser 5 is stored in the ROM 134. The default value is set to 3 mm. Then, the phase of the intermittent presser cam 22 is determined based on the height of the reference position of the use position of the intermittent presser 5 that has been set, and the set position of the intermittent presser 5 is set to a height of 3 mm from the standby position. The position is switched to the reference position (S25). If it is determined that the sewing data of rank M is neither intermittent presser data nor stitch data (S22: No, S24: No), the counter M for check is used to read the sewing data of the next rank M. Is incremented by 1 and stored in a predetermined storage area of the RAM 132 (S26). Then, it returns to S22 and repeats a process.

  Following S25, it is determined whether or not the start pedal 123 for instructing the start of sewing is set to ON (S30). If it is set to ON (S30: Yes), then the intermittent presser 5 Is lowered, that is, when it is determined that the intermittent presser 5 is set to the use position (S31: Yes), each part for executing sewing is activated (S40). However, when the intermittent presser 5 is not lowered (S31: No), the activation process is not performed, the process returns to S20, the intermittent presser pedal 122 is operated (S20: Yes), and the intermittent presser 5 is lowered. Repeat until it is done (S23 or S25). On the other hand, if the start pedal 123 is not set to ON in S30 (S30: No), it is determined that an instruction to start sewing has not yet been issued, and the process returns to S20 and the process is repeated.

  Subsequent to S40, the RAM 132 is referred to, and stitch data that is sewing data of rank 0 (N = 0) is read (S50). Subsequently, it is determined that the sewing data read in S50 is stitch data (S60: Yes), and then, it is determined whether or not the sewing needle 14 is stuck in the sewing target cloth 150 (S60). S61). This process is performed when the sewing needle 14 is stuck in the sewing target cloth 150 (S61: No), and when the XY feed pulse motor 144 (see FIG. 4) is driven in this state, the sewing machine 14 Since the needle 14 is broken, it is a process for preventing the cloth from being fed until the sewing needle is not stuck in the sewing target cloth 150 (S61: Yes). If it is determined in S61 that the sewing needle is not pierced by the cloth 150 to be sewn (S61: Yes), the RAM 132 is referred to, and the XY feed is based on the stitch data which is the sewing data of rank 0 (N = 0). The pulse motor 144 and the sewing machine motor 143 are driven (S62). By this processing, the sewing target cloth 150 is moved three times in the X direction, and a first stitch is formed. Subsequently, in order to read the sewing data of the next rank N, the data rank counter N is incremented by 1 and stored in the RAM 132 (S72). Subsequently, the process returns to S50 and is repeated.

  As in the case of the rank 0, the sewing data 221 of the ranks 1 to 4 are sequentially read (S50), and stitches are formed based on the respective sewing data (S60: Yes, S62). The stitches 171 are formed on the sewing target cloth 150 shown in FIG. 5 by the processes of the ranks 0 to 4 (S62). After the stitches are formed based on the sewing data of rank 4 (S62), the data rank counter N is incremented by 1 and set to 5, and stored in the RAM 132 (S72). Subsequently, among the sewing data 180 shown in FIG. 6, the sewing data of rank 5 is read (S50), and the sewing data 222 of rank 5 is not stitch data (S60: No) as shown in FIG. It is determined that it is presser data (S70: Yes). Subsequently, the intermittent presser pulse motor 30 is driven, and the height of the reference position of the use position of the intermittent presser 5 is set to 5 mm indicated by the intermittent presser data of rank 5. By this processing, the height of the intermittent presser 5 can be automatically set at an appropriate position according to the thickness of the sewing object cloth according to the sewing data. Subsequently, in order to read the sewing data of the next rank N, the data rank counter N is incremented by 1 and stored in the RAM 132 (S72). Subsequently, the process returns to S50 and is repeated.

  As in the cases of ranks 0 to 4, sewing data 223 of ranks 6 to 10 are sequentially read (S50), and the cloth 151 and cloth 152 of the sewing object cloth 150 shown in FIG. A stitch 173 is formed (S60: Yes, S62). The height of the reference position of the use position of the intermittent presser 5 in this processing is 5 mm set based on the intermittent presser data which is sewing data of rank 5, and the height of the reference position of this use position is the cloth 151 and This corresponds to the sum of the cloth thicknesses of the cloth 152. After the stitches are formed based on the sewing data of rank 10 (S62), 11 in which the data rank counter N is incremented (incremented) is stored in the RAM 132 (S72), and then the RAM 132 is referred to. The sewing data of rank 11 is read (S50).

  As shown in FIG. 6, the sewing data 224 of the rank 11 is temporary stop data instructing the sewing machine 1 to stop sewing (S60: No, S70: No, S80: Yes). 12 with N incremented by 1 is stored in the RAM 132 (S82). Subsequently, after the sewing by the sewing machine 1 is stopped (S90), the intermittent presser pulse motor 30 is driven, and the set position of the intermittent presser 5 is switched from the use position to the standby position above the use position (S100). ).

  Subsequently, when the intermittent presser pedal 122 and the start pedal 123 are turned on by the user to resume sewing (S20: Yes), the use position of the intermittent presser 5 for the stitch data for forming the next stitch. Processing for determining whether or not is specified is performed. In this process, as in the case where it is determined whether or not the reference position height of the use position of the intermittent presser 5 is set when the stitch is formed according to the first stitch data, the RAM 132 first has The check counter M is set to 12 (N = 12) and stored in a predetermined storage area of the RAM 132 (S21). Subsequently, the RAM 132 is referred to, and it is determined that the sewing data 225 of the rank 12 is intermittent presser data (S22: Yes), and the height of the reference position of the use position of the intermittent presser 5 becomes the intermittent presser data of the rank 12. Based on this, the height is set to 7 mm. Then, the set position of the intermittent presser 5 is switched from the standby position to the reference position of the use position set to a height of 7 mm (S23). With this process, when resuming sewing after the temporary stop, the setting position of the intermittent presser 5 set as the standby position can be set to a use position of an appropriate height indicated by the intermittent presser data.

  Subsequently, as in the case of the sewing data 221 of the ranks 0 to 4 and the sewing data 223 of the ranks 6 to 10, the sewing data 226 of the ranks 13 to 16 are sequentially read (S50), and the stitches are based on the respective sewing data. Is formed (S60: Yes, S62). The height of the reference position of the use position of the intermittent presser 5 in this process is 7 mm set based on the intermittent presser data which is the sewing data of rank 12, and this height is the thickness of the cloths 151, 152 and 153. It corresponds to the sum. By the processing based on the sewing data 226 of these ranks 13 to 16, a stitch 176 is formed on the sewing target cloth 150 shown in FIG. 5 (S62). Similarly, the ranks 17 to 19 are read (S50), and stitches are formed based on the respective sewing data (S60: Yes, S62). The height of the reference position of the use position of the intermittent presser 5 in this process is 7 mm set based on the intermittent presser data which is the sewing data of rank 12. By the processing based on the sewing data 227 of the ranks 17 to 19, a stitch 177 is formed on the sewing target cloth 150 shown in FIG. 5 (S62).

  After the stitches are formed based on the sewing data of the rank 19 (S62), the data rank counter N incremented by 1 is stored in the RAM 132 (S72). Subsequently, the RAM 132 is referred to. The sewing data of rank 20 is read (S50).

  As shown in FIG. 6, the sewing data of rank 20 is end data instructing the end of sewing by the sewing machine 1 (S60: No, S70: No, S80: No). In order to perform the processing based on this, the data rank counter N is set to 0 and stored in a predetermined storage area of the RAM 132 (S81). Subsequently, the sewing by the sewing machine 1 is stopped, the setting position of the intermittent presser 5 is switched from the use position to the standby position (S100), the process returns to S10, and the process is repeated until it is determined that there is no sewing data.

  In the sewing machine 1 of the present embodiment described in detail above, stitch data for instructing a needle drop point for forming a stitch on the sewing target cloth and the height of the reference position of the use position of the intermittent presser 5 are instructed. The RAM 132 shown in FIG. 4 that stores sewing data including at least intermittent presser data corresponds to the sewing data storage means of the present invention. Further, the ROM 134 or RAM 132 shown in FIG. 4 that stores the default value of the reference position of the use position of the intermittent presser 5 corresponds to the default value storage means of the present invention. Further, the intermittent presser vertical drive device 20 shown in FIG. 1 that switches the set position of the intermittent presser 5 between the use position for pressing the cloth to be sewn and the standby position above the use position is used as the switching mechanism of the present invention. Equivalent to. Further, in S22 shown in FIG. 7, before switching the position of the intermittent presser 5 from the standby position to the use position, the sewing data stored in the RAM 132 is sequentially read. The CPU 133 shown in FIG. 4 functions as a reading unit of the present invention. . In S22 shown in FIG. 7, the height of the reference position of the use position of the intermittent presser 5 when sewing is performed based on the first stitch data included in the sewing data is determined by the intermittent presser data included in the sewing data. The CPU 133 shown in FIG. 4 that determines whether or not it is instructed functions as sewing data determination means of the present invention.

  Further, when the sewing machine is temporarily stopped and the set position of the intermittent presser 5 is switched from the use position to the standby position (S80: Yes, S100), the sewing sequence is included in the next sewing data in S22 shown in FIG. The CPU 133 shown in FIG. 4 determines whether the height of the reference position of the use position of the intermittent presser 5 when sewing is based on the intermittent presser data included in the sewing data. It functions as the sewing data judgment means of the invention. In S22 shown in FIG. 7, when it is determined that the reference position height of the use position of the intermittent presser 5 is instructed by the intermittent presser data (S22: Yes), the intermittent presser vertical drive device 20 is driven. Then, the setting position of the intermittent presser 5 is switched from the standby position to the use position of the height indicated by the intermittent presser data (S23), and the height of the reference position of the use position of the intermittent presser 5 is set to the intermittent presser. When it is determined that the data is not instructed (S24: Yes), the intermittent presser vertical drive device 20 is driven and the set position of the intermittent presser 5 is set to the default value stored in the ROM 134 or RAM 132 from the standby position. The CPU 133 shown in FIG. 4 functions as the intermittent presser position control means of the present invention.

  According to the sewing machine 1 described in detail above, when it is determined that the reference position height of the use position of the intermittent presser 5 is indicated by the intermittent presser data, the intermittent presser vertical drive device 20 is driven, The setting position of the intermittent presser 5 set as the standby position is set to a use position having an appropriate height indicated by the intermittent presser data. For this reason, it is possible to prevent the intermittent presser 5 from pressing the cloth to be sewn strongly at the start of sewing and damaging the cloth to be sewn or causing the fabric to flutter and adversely affect the formation of the seam. Also, when the sewing by the sewing machine 1 is temporarily stopped and then the sewing is resumed, when it is determined that the reference position height of the use position of the intermittent presser 5 is indicated by the intermittent presser data. Can drive the intermittent presser vertical drive device 20 and automatically set the set position of the intermittent presser 5 set as the standby position to a use position of an appropriate height indicated by the intermittent presser data. . If it is determined that the reference position height of the use position of the intermittent presser 5 is not instructed by the intermittent presser data, the intermittent presser vertical drive device 20 is driven, and the set position of the intermittent presser 5 is set as the default. It is set to the use position of the height indicated by the value. For this reason, the setting position of the intermittent presser 5 can be automatically set to an appropriate position depending on whether or not the setting position of the intermittent presser 5 is indicated by the intermittent presser data.

  The present invention is not limited to the embodiment described in detail above, and various modifications may be made without departing from the scope of the present invention. First, the sewing machine 1 is not limited to the configuration of the sewing machine 1 described above. For example, the drive means can be replaced if it constitutes a mechanically equivalent drive system. For example, a servo motor may be used instead of the pulse motor, and the same effect is exhibited. Further, in the cam mechanism 21, the outer shape cam is used as the intermittent presser cam 22, but the cam applicable here is not limited to this, and the groove cam and other mechanically similar cams are used. A cam that demonstrates its function can be used. Further, the outer presser 41 can be moved up and down by the outer presser cam 43 fitted on the output shaft 31 of the intermittent presser pulse motor 30 for moving the intermittent presser 5 up and down. It is also possible to omit the drive means for.

  Further, in the present embodiment, the height of the intermittent presser 5 is instructed by the intermittent presser data whose order is higher than the stitch data. However, the height of the intermittent presser at the time of sewing can be instructed based on the sewing data. Any data structure may be used, and the present invention is not limited to this. For this reason, for example, the height of the intermittent presser 5 at the time of sewing may be determined based on the stitch data based on the intermittent presser data immediately after the stitch data, or the intermittent presser data is attached to the stitch data. In such a case, the process of determining whether the height of the intermittent presser 5 is instructed by the intermittent presser data may be appropriately changed according to the data configuration.

  Further, in the present embodiment, the height of the reference position of the use position of the intermittent presser 5 is set based on the intermittent presser data. However, this reference position is not limited to the case of the present embodiment, and is a sewing target. Various reference positions for pressing the cloth 2 with an appropriate pressing force can be adopted. For example, when sewing is started from a position where the intermittent movement of the intermittent presser 5 is the highest, the reference position of the use position may be set to the highest position.

  In the present embodiment, when the sewing by the sewing machine 1 is temporarily stopped and then the sewing is resumed, the reference position height of the use position of the intermittent presser 5 is indicated by the intermittent presser data. If it is determined, the intermittent presser vertical drive device 20 is driven, and the set position of the intermittent presser 5 set as the standby position is automatically set to the use position of the appropriate height indicated by the intermittent presser data. However, when sewing is performed based on the sewing data that does not include the pause data, or when sewing is resumed after the pause, the sewing is started as a new sewing. In some cases, this process may be omitted.

  In the present embodiment, if it is determined that the intermittent presser data is not instructed, the intermittent presser vertical drive device 20 is driven, and the intermittent presser setting position is used by the height indicated by the default value. However, this process is omitted when sewing based on the sewing data where the height of the use position of the intermittent presser is all indicated by the sewing data and the default value need not be used. Also good. Further, the default value may be determined by the user using the operation panel 120, or a plurality of default values may be stored in a predetermined storage area such as the ROM 134 and the RAM 132, and the type of sewing data An appropriate default value may be automatically selected and used according to the sewing object cloth or the like.

1 is a perspective view of a sewing machine 1 according to an embodiment of the present invention. 2 is a left side view of the sewing machine 1. FIG. It is a right view of the intermittent motion interlocking means 60 with which the sewing machine 1 is provided. 2 is a conceptual diagram showing an electrical configuration of the sewing machine 1. FIG. 5 is an explanatory diagram for explaining a sewing target cloth 150 according to a specific example 1 and stitches 171, 173, 176, and 177 formed on the sewing target cloth 150. FIG. FIG. 6 is an explanatory diagram for explaining sewing data 180 for sewing the sewing target cloth 150 shown in FIG. 5. 6 is a flowchart showing a flow of processing for setting a reference position of a use position of the intermittent presser 5;

1 sewing machine 5 intermittent presser 20 intermittent presser vertical drive device 132 RAM
133 CPU
134 ROM

Claims (4)

The intermittent presser that presses the cloth to be sewn in conjunction with the vertical movement of the needle bar of the sewing machine, the set position of the intermittent presser to the use position that presses the sewing target cloth, and the standby position that is above the use position. In a sewing machine equipped with a switching mechanism for switching,
Sewing data storage for storing sewing data including at least stitch data for instructing a needle drop point for forming a stitch on the sewing target cloth and intermittent presser data for instructing a height of the use position of the intermittent presser Means,
Read means for sequentially reading out the sewing data stored in the sewing data storage means before the switching mechanism switches the intermittent presser position from the standby position to the use position;
The height of the use position of the intermittent presser when sewing is performed based on the first stitch data included in the sewing data read by the reading means is determined by the intermittent presser data included in the sewing data. Sewing data judgment means for judging whether or not an instruction is given;
When it is determined by the sewing data determination means that the height of the use position of the intermittent presser is instructed by the intermittent presser data, the switching mechanism is driven, and the set position of the intermittent presser is Intermittent presser position control means for switching from the standby position to the use position at a height indicated by the intermittent presser data ;
When the intermittent presser position control means switches the set position of the intermittent presser to the use position at the height indicated by the intermittent presser data and then receives an instruction to start sewing, the sewing object cloth A sewing machine comprising sewing start means for starting sewing.   The sewing data determining means is configured to add the sewing data to the stitch data included in the next sewing data when the sewing machine is temporarily stopped and the setting position of the intermittent presser is switched from the use position to the standby position. 2. The sewing machine according to claim 1, wherein whether or not the height of the use position of the intermittent presser at the time of sewing is instructed by the intermittent presser data included in the sewing data is determined. A default value storage means for storing a default value of the use position of the intermittent presser;
The intermittent presser position control means drives the switching mechanism when the sewing data determination means determines that the height of the use position of the intermittent presser is indicated by the intermittent presser data, The setting position of the intermittent presser is switched from the standby position to the use position at a height indicated by the intermittent presser data, and the sewing data determining means determines the height of the use position of the intermittent presser. When it is determined that no instruction is given by the intermittent presser data, the switching mechanism is driven, and the setting position of the intermittent presser is changed from the standby position by the default value stored in the default value storage means. The sewing machine according to claim 1, wherein the sewing machine is switched to the use position at a designated height.   A sewing machine program for causing a computer to function as various processing means of the sewing machine according to any one of claims 1 to 3.

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