JP2009000272A - Needle interlock stitch machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To easily match an indicated position by a position indication means on an object to be sewn and a needle location point without taking the time and labor of manually changing the indicated position by the position indication means even in the case of changing the needle location point of a sewing needle at the start of sewing. <P>SOLUTION: The needle interlock stitch machine includes: a needle bar 3 equipped with a sewing needle 2 at the lower end part for vertically moving and swinging the needle so as to swing the sewing needle 2; a needle bar support base 11 which supports the needle bar 3 and is swung together with the needle swing of the needle bar 3; and an irradiation member 18 for indicating the needle location point of the sewing needle 2 when the needle bar 3 is positioned at the lower dead point by irradiation light, on the object 17 to be sewn disposed at a bed section 15. The position indication means is attached to a swing member. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a needle swing sewing machine including a needle bar that moves up and down and swings, and a position indicating unit that indicates a needle drop point of a sewing needle attached to a lower end portion of the needle bar.

  Conventionally, a needle swing sewing machine has been used that can sew and sew the sewing product while swinging the needle bar and moving it up and down so that the sewing needle swings in a direction perpendicular to the conveyance direction of the sewing product. Has been. The needle swing sewing machine is designed to position the sewing needle at multiple needle drop points by swinging the needle bar, which makes it possible to perform various types of sewing such as straight stitching, zigzag sewing, and stitch stitching. Has been. Such a needle swing sewing machine is sewed with different needle drop points of the sewing needle at the start of sewing depending on the type of sewing.

  FIG. 4 is a schematic side view showing an example of a conventional needle swing sewing machine. As shown in FIG. 4, for example, when linear sewing is performed by the needle swing sewing machine 31, the needle swing sewing machine 31 is a needle at the start of sewing. The sewing needle 33 attached to the lower end portion of the bar 32 is positioned at the central base line which is the central part of the swinging width so that the sewing object 35 is conveyed while moving the needle bar 32 only up and down without swinging the needle. It has become. Further, when zigzag sewing is performed by the needle swing sewing machine 31, the needle swing sewing machine 31 places the sewing needle 33 on the right base line (right side in FIG. 4) which is one side of the swinging width at the start of sewing, and the needle bar 32. The sewing product 35 is conveyed while the needle is swung and moved up and down. Further, when performing stitch stitching by the needle swing sewing machine 31, the needle swing sewing machine 31 places the sewing needle 33 on the left base line (the left side in FIG. 4) which is the other side of the swinging width at the start of sewing, The sewing object 35 is conveyed while the bar 32 is swung and moved up and down.

  Further, since the needle drop point at the start of sewing is different in the needle swing sewing machine 31 as described above, it is necessary to check the needle drop point on the workpiece 35 arranged on the bed portion 37 of the needle swing sewing machine 31. is there. In such a case, the operator of the needle swing sewing machine 31 manually lowers the needle bar 32 by rotating a rotating member (not shown) connected to the needle bar 32 and covers the tip of the sewing needle 33. The needle drop point is confirmed by approaching the sewing product 35. However, it is time-consuming to manually lower the needle bar 32 every time sewing is started, and the operability of the needle swing sewing machine 31 is lowered.

  For this reason, from the viewpoint of improving the operability of the needle swing sewing machine 31 by allowing the operator of the needle swing sewing machine 31 to easily and reliably check the needle drop point on the sewing product 35, Position indicating means for indicating the needle drop point of the needle bar 32 is used on the placed workpiece 35 (see, for example, Patent Document 1).

  This position indicating means is constituted by, for example, an irradiation member 39 provided with a laser diode or a light emitting diode. The irradiation member 39 is connected at its rear end portion to a mounting base 41 attached to the arm portion 40 of the needle swing sewing machine 31 via a swing shaft 42, and emits irradiation light from the tip portion to the needle drop point of the sewing needle 33. It is attached to the outer surface of the arm portion 40 of the needle swing sewing machine 31 so as to irradiate, and can swing around the swing shaft 42.

  The irradiation member 39 instructs the needle drop point on the sewing product 35 by irradiating the needle drop point with irradiation light. Thereby, the operator of the needle swing sewing machine 31 can easily and surely confirm the needle drop point of the sewing needle 33 on the sewing product 35.

JP 2003-88691 A

  However, in the needle swing sewing machine 31 that includes the irradiation member 39 described above and the needle bar 32 swings, whenever the needle drop point at the start of sewing is changed, the irradiation member 39 is manually moved via the swing shaft 42. By swinging, it is necessary to match the indicated position indicated by the irradiation light with the position of the needle drop point at the start of sewing, which is troublesome. Also, if you forget to match the indicated position with the position of the needle entry point at the start of sewing, sewing may start from an unintended position.In such a case, remove the sewing thread and After matching the position with the position of the needle entry point at the start of sewing, sewing had to be started again, which was troublesome.

  The present invention has been made in view of these points, and when the needle drop point of the sewing needle at the start of sewing is changed, the indication position and the needle drop point by the positioning means on the workpiece are easily changed. An object of the present invention is to provide a needle swing sewing machine that can be adjusted to the sewing machine.

  In order to achieve the above object, the needle swing sewing machine according to the first aspect of the present invention is characterized in that a needle is mounted so that a sewing needle is attached to a lower end portion and moves up and down while swinging the sewing needle. And a swing member that swings together with the needle swing of the needle bar, and a needle drop point of the sewing needle when the needle bar is located at the bottom dead center on the sewing object disposed on the bed. Position indicating means, and the position indicating means is attached to the swing member.

  According to the first aspect of the present invention, according to the present embodiment, the position indicating means for indicating the needle drop point of the sewing needle is attached to the swing member that swings together with the needle swing of the needle bar. Therefore, it can be swung with the needle swing of the needle bar. For this reason, even if the needle drop point of the sewing needle at the start of sewing is changed, the position indicating means is adapted to the needle swing of the needle bar by swinging with the needle swing of the position indicating means needle bar. The indicated position can be automatically changed.

  The needle swing sewing machine according to a second aspect of the present invention is characterized in that the position indicating means includes an irradiation member that indicates a needle drop point by irradiation light.

  According to the second aspect of the present invention, as the position indicating means for indicating the needle drop point of the sewing needle on the sewing product, the irradiation member that indicates the needle drop point by the irradiation light is used, thereby allowing the sewing product to be sewn. It is possible to reliably indicate the needle entry point without being damaged.

  As described above, according to the needle swing sewing machine according to the present invention, even if the needle drop point of the sewing needle at the start of sewing is changed, the trouble of manually changing the indicated position by the position indicating means is reduced. It is possible to easily match the indicated position by the position indicating means and the needle drop point on the sewing product without applying.

  Hereinafter, an embodiment of a needle swing sewing machine according to the present invention will be described with reference to FIGS. 1 to 3.

  FIG. 1 is a schematic cross-sectional view showing a main part of a needle swing sewing machine according to the present embodiment. As shown in FIG. 1, the needle swing sewing machine 1 has a needle bar having a sewing needle 2 attached to the lower end thereof. 3 is provided inside the arm portion 5.

  The needle bar 3 is supported by a needle bar holder 6 at a part in the length direction, and the needle bar holder 6 is connected to an eccentric position of the needle bar crank 8 via a needle bar crank rod 7. One end of a sewing machine main shaft 9 that is rotated by the driving of the main shaft motor is fixed to the front end. The needle bar holder 6 moves up and down via the needle bar crank 8 and the needle bar crank rod 7 as the sewing machine main shaft 9 is rotated by driving a main shaft motor (not shown). The bar 3 moves up and down as the needle bar holder 6 moves up and down.

  The needle bar 3 is supported by a needle bar support 11, and the needle bar support 11 is arranged along the length direction of the needle bar 3 inside the arm 5, and the upper end is a support shaft 12. Is swingably supported. A middle portion of the needle bar support base 11 in the length direction is connected to a needle swing motor (not shown) via a connecting member 13, and is driven around the support shaft 12 via the connecting member 13 by driving of the needle swing motor. The sewing machine 17 swings in a direction perpendicular to the conveyance direction of the sewing product 17. Thereby, the needle bar support 11 acts as a swinging member that swings with the needle swinging of the needle bar 3.

  Due to the swing of the needle bar 3, the sewing needle 2 is positioned at a plurality of needle swing positions. In this embodiment, the center base line, which is the center of the swing width of the needle bar 3, It is positioned at three locations: a right base line that is one side of the moving width and a left base line that is the other side of the swing width. When the needle swing sewing machine 1 performs straight stitching as shown in FIG. 2 (a), the sewing needle 2 is positioned at the center baseline at the start of sewing, and zigzag sewing is performed as shown in FIG. 2 (b). When sewing needle 2 is positioned on the right base line at the start of sewing and stitch stitching is performed as shown in FIG. 2C, the sewing needle 2 is positioned on the left base line at the start of sewing.

  Further, the needle swing sewing machine 1 is provided when the needle bar 3 that moves up and down is located at the bottom dead center on the workpiece 17 arranged on the needle plate 16 of the bed portion 15 located below the sewing needle 2. Position indicating means for supporting the needle drop point of the sewing needle 2 is provided. In the present embodiment, the position indicating means is constituted by an irradiation member 18 provided with a laser diode or a light emitting diode, and the irradiation member 18 indicates a needle drop point by irradiation light irradiated from the distal end portion. Irradiation light is irradiated by various shapes such as a line shape or a line shape along the conveying direction of the sewing member.

  As shown in FIG. 3, an attachment base 20 for attaching the irradiation member 18 is fixed to the side surface of the needle bar support base 11 with a fixing screw 21. The mounting base 20 has a pedestal portion 22 attached to the needle bar support base 11 and a mounting portion 23 fixed to the pedestal portion 22 and supporting the irradiation member 18, and the mounting surface to which the mounting portion 23 is attached is a needle. The inclined surface is inclined in the direction of the falling point. The attachment portion 23 is a cylindrical shape into which the irradiation member 18 is inserted, and an opening portion 23a is formed on one side portion thereof, and both side edges of the opening portion 23a are tightened using a tightening screw 25 and a nut 26. The irradiation member 18 is supported by pressing the inner surface of the mounting portion 23 against the peripheral surface of the irradiation member 18.

  The irradiation member 18 is inserted into the attachment portion 23, and when the sewing needle 2 is positioned at the middle baseline, the attachment position is adjusted so that the needle drop point of the middle baseline is indicated by the irradiation light. The nut 26 is fixed to the mounting base 20 by tightening both side edges of the mounting portion 23. Thus, since the irradiation member 18 is fixed to the needle bar support 11 through the mounting base 20, the irradiation member 18 swings following the needle bar support 11 that swings with the needle bar 3 swinging. ing. When the needle bar 3 swings so that the sewing needle 2 is positioned on the right base line due to the swinging of the irradiation member 18, the irradiation member 18 swings together to irradiate the needle drop point on the right base line. When the needle bar 3 swings so that the sewing needle 2 is positioned on the left base line, the irradiation member 18 also swings to irradiate the needle drop point on the left base line. Moreover, when the to-be-sewn material 17 is thick, the indication position by the irradiation member 18 can be adjusted by adjusting the mounting position of the irradiation member 18 on the mounting base 20.

  The needle swing sewing machine 1 includes a display unit composed of a liquid crystal display device or the like, and a touch panel for inputting instructions to the needle swing sewing machine 1 is provided on the front surface of the display unit. Then, when the operator presses a predetermined position on the touch panel, the display unit inputs a predetermined instruction to the needle swing sewing machine 1 such as a sewing type such as straight stitching, zigzag sewing, and stitch stitching. In addition, each instruction to the operator is displayed.

  Further, the needle swing sewing machine 1 includes a control unit that controls each operation of the needle swing sewing machine 1, and the control unit drives the needle swing motor when a sewing type is input through the touch panel by the operator. Then, by swinging the needle bar 3 via the connecting member 13 and the needle bar support 11, the sewing needle 2 is positioned at a predetermined needle position according to the type of sewing at the start of sewing. . Then, after the sewing needle 2 is positioned at a predetermined needle position, the control means drives the spindle motor to move the needle bar 3 up and down and swings the needle in accordance with the inputted sewing type instruction or Needle swing is not performed, and the workpiece 17 is conveyed to perform the input type of sewing.

  Next, the operation of this embodiment will be described.

  First, when the operator inputs a sewing type on the touch panel, the control unit of the needle swing sewing machine 1 sets the needle swing motor so that the sewing needle 2 is positioned at a predetermined needle position in accordance with the input sewing type. The needle bar 3 is swung through the connecting member 13 and the needle bar support 11 by driving. For example, when straight stitching is selected on the touch panel, the sewing needle 2 is set to the middle base line, when zigzag sewing is selected, the sewing needle 2 is set to the right base line, and when the stitch stitch is selected, sewing is performed. The needle bar 3 is swung so that the needle 2 is positioned at the needle position on the left base line. At this time, the needle bar support 11 swings as the needle bar 3 swings, and the irradiation member 18 attached to the needle bar support 11 also swings. The irradiation member 18 indicates the needle drop point of the middle base line on the sewing object 17 by the irradiation light when the sewing needle 2 is positioned at the middle base line, and the sewing needle 2 is moved to the right base line by swinging the needle bar 3. When positioned, the irradiating member 18 also swings as the needle bar 3 swings, whereby the irradiating member 18 indicates the needle drop point on the right base line with the irradiation light. Further, when the sewing needle 2 is positioned on the left base line due to the swinging of the needle bar 3, the irradiation member 18 also swings along with the swinging of the needle bar 3, whereby the irradiation member 18 has a needle drop point on the left base line. Is indicated by irradiation light.

  Thereafter, the control means drives the needle bar 3 in accordance with the input type of sewing while driving the spindle motor to move the needle bar 3 up and down after positioning the sewing needle 2 at a predetermined needle position. When linear stitching is input, the control means drives the spindle motor to move the needle bar 3 up and down, conveys the workpiece 17, and performs sewing from the needle drop point of the middle baseline indicated by the irradiation member 18. Start and perform straight stitching. On the other hand, when the zigzag stitching is input, the control means drives the spindle motor to drive the needle bar 3 up and down and swings the needle, and conveys the sewing object 17, and the needle on the right base line designated by the irradiation member 18. Start sewing from the falling point and perform zigzag sewing. Further, when the stitch stitch is inputted, the control means drives the spindle motor to drive the needle bar 3 up and down and swings the needle bar 3 and conveys the sewing object 17, and the left base line designated by the irradiation member 18. Start sewing from the needle entry point and sew stitches.

  According to the present embodiment, the irradiation member 18 that indicates the needle drop point of the sewing needle 2 is attached to the needle bar support 11 that swings with the needle bar 3 swinging the needle. And can swing together. For this reason, even if the needle drop point of the sewing needle 2 at the start of sewing is changed, the irradiation member 18 is swung together with the needle swing of the needle bar 3 to match the needle swing of the needle bar 3. The designated position by the irradiation member 18 can be automatically changed.

  Therefore, the needle swing sewing machine 1 can easily match the indicated position by the irradiation member 18 and the needle drop point on the sewing object 17 without manually changing the indicated position by the irradiation member 18. It becomes.

  Further, as the position indicating means for indicating the needle drop point of the sewing needle 2 on the workpiece 17, the irradiation member 18 that indicates the needle drop point by irradiation light is used, so that the needle drop point is not damaged. Can be instructed reliably.

  In addition, this invention is not limited to the said embodiment, A various change is possible as needed.

  In the present embodiment, the irradiation member 18 that is a position indicating means is attached to the needle bar support 11 that swings the needle bar 3, but the present invention is not limited to this. For example, the needle bar 3 is directly or indirectly connected to the needle bar 3, such as a connecting member 13 for swinging the needle bar support 11 or a member attached to the needle bar 3 to follow the needle swing of the needle bar 3. What is necessary is just to attach to the rocking | swiveling member rock | fluctuated with 3 needle | hook swings.

  The means for attaching the irradiation member 18 to the swinging member is not limited to this embodiment, and various attachment means can be applied.

  Further, in the present embodiment, the irradiation member 18 that indicates the needle drop point by the irradiation light has been described as the position instruction means that indicates the needle drop point. However, the position instruction means is not limited to this embodiment. Absent.

Schematic sectional view showing an embodiment of a needle swing sewing machine according to the present invention (A)-(c) is a schematic plan view which shows each shape of sewing by the needle swing sewing machine of FIG. 1 is a schematic cross-sectional view showing a position indicating means attached to the needle swing sewing machine of FIG. Schematic side view showing an example of a conventional needle swing sewing machine

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Needle swing sewing machine 2 Sewing needle 3 Needle bar 5 Arm part 6 Needle bar holding 7 Needle bar crank rod 8 Needle bar crank 9 Sewing machine main shaft 11 Needle bar support stand 12 Support shaft 13 Connecting member 15 Bed part 16 Needle plate 17 Sewing product 18 Irradiation member 20 Mounting base 22 Base part 23 Mounting part

Claims (2)

A needle bar having a sewing needle attached to the lower end thereof and moving up and down and swinging so that the sewing needle swings;
An oscillating member that oscillates with the needle swing of the needle bar;
A position indicating means for instructing a needle drop point of the sewing needle when the needle bar is positioned at a bottom dead center on the sewing object disposed in the bed portion;
A needle swing sewing machine characterized in that the position indicating means is attached to the swing member.   The needle swing sewing machine according to claim 1, wherein the position indicating unit includes an irradiation member that indicates a needle drop point by irradiation light.

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