JP2009273675A - Dyeing type embroidery machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To control a sewing speed in a head part by the original speed by temporarily holding the dyed thread of a needle thread, which is dyed in a thread dyeing part. <P>SOLUTION: A dyeing box 20 is arranged on the rear surface of a base table 1. A thread dyeing part 21, a thread driving part 27, and a thread holding part 28 are arranged in the dyeing box 20. The needle thread from a needle thread bobbin 8A is guided by the thread driving part 27 to the thread dyeing part 21 in an arrow c direction via a thread passage guide 9. The thread dyeing part 21 performs dyeing in an inkjet part 22A, etc., and the dyed thread S is guided to the thread holding part 28 in a downstream. The thread holding part 28 temporarily holds the dyed thread S on a placement belt 30, thereby absorbing a difference between the sewing speed in the head part 2 and the dyeing speed in the thread dyeing part 21. Subsequently, the dyed thread S is fed to the arrow e direction from the inside of the dyeing box 20 toward the thread passage guide 9. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a dyeing embroidery machine that is suitably used to create a multicolored embroidery pattern on, for example, an embroidery object such as an embroidery cloth, and in particular, automatically using an upper thread that has been dyed in a desired color. The present invention relates to a dyeing embroidery machine that can realize simple embroidery.

  In general, an embroidery machine that realizes a multi-color embroidery pattern on an embroidery object such as a cloth using a multi-color upper thread (embroidery thread) by driving and controlling the main shaft of the embroidery machine according to embroidery data and the like. Various types have been proposed.

  Among these, for example, by using an ink-jet type dyeing mechanism or the like, the upper yarn is continuously dyed based on the color information of the embroidery data, and this dyed yarn (yarn dyed with a plurality of different colors) is used. There is known a dyeing embroidery machine configured to realize an embroidery pattern (see, for example, Patent Document 1).

  A dyeing embroidery machine according to this type of prior art includes a base provided with a drive source such as an electric motor that rotationally drives the main shaft, a head portion mounted on the base and provided with a sewing needle and a balance, An upper thread storage section for storing the upper thread for supplying the upper thread to the sewing needle through a balance of the head section, and a thread path located between the upper thread storage section and the head section. And a yarn dyeing portion for dyeing the upper yarn.

  In this case, the yarn dyeing unit ejects ink of a plurality of colors (for example, cyan, magenta, yellow, and black) to the upper yarn moving along the yarn path, and the desired color is applied to the upper yarn. Perform staining. As a result, the upper yarn that has become a dyed yarn is dyed yellow in one part, red in the other part, green in the other part along the length direction, etc. The thread length is determined based on the color information of the embroidery data.

JP-A-6-299458 (Patent No. 3066937)

  By the way, according to the above-described prior art, the thread feed amount on the sewing machine side is controlled by changing the sewing speed by controlling the number of rotations of the spindle according to the sewing pattern, or by changing the sewing width for each stitch. The speed is not constant, and the yarn feed is intermittent feed. On the other hand, the speed at which the upper thread is dyed at the yarn dyeing part (hereinafter referred to as dyeing speed) causes color unevenness unless the amount of ink per unit length is constant. It is necessary to make the amount of ink to be ejected uniform and keep it constant.

  For this reason, in the conventional dyeing embroidery machine, for example, a speed difference occurs between the sewing speed on the head side and the dyeing speed on the yarn dyeing side, and the sewing speed on the head side is increased. Even when it is possible, there is a problem that it is difficult to realize an efficient embroidery work because the sewing machine control must be performed so as to reduce the sewing speed in accordance with the dyeing speed of the upper thread by the yarn dyeing portion.

  The present invention has been made in view of the above-described problems of the prior art, and an object of the present invention is to temporarily store the upper yarn dyed at the yarn dyeing portion, thereby allowing the sewing speed on the head portion side to be increased. It is an object of the present invention to provide a dyeing embroidery machine capable of controlling the embroidery at an original speed and realizing an efficient embroidery work.

  In order to solve the above-described problems, the present invention provides a base for embroidery, a head portion mounted on the base and provided with a sewing needle and a balance, and supplies the sewing needle through the balance of the head portion. Dyeing type comprising an upper yarn storage portion for storing the upper thread, and a yarn dyeing portion that is provided in the middle of a yarn path located between the upper yarn storage portion and the head portion and dyes the upper yarn Applicable to embroidery machine.

  A feature of the configuration adopted by the invention of claim 1 is that the upper yarn dyed yarn dyed at the yarn dyeing portion is temporarily accumulated between the yarn dyeing portion and the head portion, and the head portion A thread pool part that absorbs a speed difference between a sewing speed using a sewing needle on the side and a dyeing speed at the thread dyeing part is provided, and the head part stores the dyed yarn that has been stored in advance in the thread pool part. It is configured to supply to the sewing needle side through the balance.

  According to a second aspect of the present invention, the yarn accumulating portion is configured to send the dyed yarn sequentially dyed in the yarn dyeing portion from the head side toward the head portion side.

  According to a third aspect of the present invention, the yarn accumulating portion includes a yarn winding drum for collecting the dyed yarn in a wound state by winding the dyed yarn in a spiral shape, and the yarn spool is wound around the yarn winding drum. The dyed yarn is sequentially sent from the head side toward the head unit side.

  As described above, according to the invention of claim 1, the upper yarn dyed in advance in the yarn dyeing portion can be temporarily stored by the yarn reservoir provided between the yarn dyeing portion and the head portion. Thus, the speed difference between the sewing speed on the head portion side and the dyeing speed at the yarn dyeing portion can be absorbed. On the head side of the embroidery machine, the dyed yarn previously stored in the thread reservoir can be continuously supplied to the sewing needle side through the balance, and the sewing speed on the head side can be controlled at the original high speed. In addition, an efficient embroidery work can be realized.

  In addition, according to the invention of claim 2, the yarn reservoir portion is configured to send out the dyed yarn sequentially dyed in the yarn dyeing portion from the head side toward the head portion side. For example, the dyed yarn can be supplied from the yarn accumulating portion to the head portion side in accordance with the dyeing order of yellow, red, green, etc., and an embroidery pattern according to the color information of the embroidery data can be realized.

  Furthermore, according to the invention of claim 3, the yarn accumulating part includes a yarn winding drum that winds the dyed yarn in a spiral shape and collects the dyed yarn in a wound state. The dyed yarns that have been dyed can be sent out sequentially from the head side toward the head unit side according to the color order. Then, by collecting the dyed yarn in a wound state around the winding drum, it is possible to prevent problems such as tangling of the dyed yarns on the way, and to smoothly feed the dyed yarn toward the head side. .

  Hereinafter, a dyeing embroidery machine according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

  Here, FIG. 1 to FIG. 8 show a first embodiment of the present invention. In the figure, reference numeral 1 denotes a base constituting the main body of the dyeing embroidery machine. The base 1 supports a head portion 2 and the like, which will be described later, from below as shown in FIGS. The holding frame 12A of the frame driving device 12 is supported so as to be movable in the horizontal direction (X-axis direction, Y-axis direction).

  Reference numeral 2 denotes a head portion of the embroidery machine erected on the base 1, and the head portion 2 includes a head main body 3 fixed at a fixed position as shown in FIGS. 2 and 3, and a front side of the head main body 3. A needle bar case 4 as a movable support that is movable to the left and right (in the directions of arrows a and b in FIG. 2) with respect to the head body 3, and provided on the needle bar case 4 There is also provided a thread tension base 5 which is moved in the left and right directions integrally with the needle bar case 4 by a color changing mechanism (not shown).

  The head unit 2 is provided with a balance drive unit, a needle bar drive unit (both not shown) and the like that are driven by the spindle motor through the spindle, and the balance 6 and the sewing needle 7 are driven by these drive units. Driven up and down respectively. The color changing mechanism performs a so-called color changing operation by moving the needle bar case 4 and the thread tension base 5 together to the left and right (in the directions of arrows a and b in FIG. 2). is there.

  Reference numeral 8 denotes a thread stand that serves as an upper thread storage section provided on the rear side of the head unit 2. The thread stand 8 is provided with a plurality of (for example, three) upper thread bobbins 8A, 8B, 8C and the like. Of these upper thread bobbins 8A, 8B, 8C, for example, an upper thread bobbin 8A is wound with an upper thread (for example, a white upper thread) to be dyed. Further, for example, a red-red upper thread (embroidery thread) or the like is wound around the other upper thread bobbin 8B, and a black upper thread (embroidery thread) or the like is wound around the remaining upper thread bobbin 8C. Is done.

  In this case, in the later-described dyed yarn S, for example, a true red color and a black color may not always be dyed into a beautiful color. For this reason, the embroidery operation described later is performed using the embroidery thread (upper thread) of each color prepared in advance for the true red color and the black color. At the time of actual embroidery work, one of the upper threads (including a dyed thread S described later) wound around the upper thread bobbins 8A, 8B, 8C is selected by the color changing mechanism, and the selected upper thread is used as the balance 6 For example, an embroidery pattern is created for an embroidery object such as an embroidery cloth.

  9 is a yarn path guide erected on the yarn stand 8, and the yarn path guide 9 is a diagram showing, for example, an upper thread to be dyed wound around the upper thread bobbin 8 </ b> A toward a yarn dyeing unit 21 described later. 3 is guided in the direction indicated by the arrow c in FIG. 3, and the dyed upper thread (dyed yarn S) is guided in the direction indicated by the arrow f from the dyeing box 20 described later toward the yarn tensioner 10 side of the thread tension table 5. The yarn path guide 9 also has a function of individually guiding the upper thread wound around the other upper thread bobbins 8B and 8C toward the other tensioner 10 side of the thread tension base 5.

  Here, the yarn path guide 9 along with a dyeing box 20 described later, for example, a thread path that guides the upper thread from the upper thread bobbin 8A in the direction indicated by the arrow c, the direction indicated by the arrow d, the direction indicated by the arrow e in FIG. In the middle of the yarn path, a yarn dyeing portion 21, a yarn driving portion 27, and a yarn accumulating portion 28, which will be described later, are respectively arranged.

  Reference numeral 10 denotes a plurality of yarn tensioners provided on the thread tension table 5 of the head unit 2, and these yarn tensioners 10 are, for example, three pieces spaced apart from each other on the upper side of the thread tension table 5 as shown in FIG. 2. It is arranged. The yarn tensioner 10 suppresses the occurrence of slack in the upper thread (dyed thread S) in the middle of the yarn path guide 9 positioned between the thread stand 8 and the thread tension base 5, for example. A predetermined tension is applied to the yarn.

  Reference numeral 11 denotes a plurality of thread tensions that are respectively provided on the thread tension stand 5 and are located on the lower side of each thread tensioner 10. Then, the upper thread (including the dyed thread S) drawn from the upper thread bobbins 8A, 8B, 8C, etc. of the thread stand 8 is guided to each thread tension 11 via the tensioner 10, and this thread A low-friction yarn is fed toward the balance 6 by the tone 11.

  A frame driving device 12 is provided on the base 1 below the head portion 2. The frame driving device 12 holds the holding frame 12A such as an embroidery cloth in the X-axis direction and the Y-axis as shown in FIG. The frame is moved in the direction. In this case, an embroidery object such as an embroidery cloth is held in a stretched state on the holding frame 12A. When the sewing machine needle 7 is moved by the head portion 2, the frame driving device 12 moves the holding frame 12A of the embroidery cloth in the X-axis direction and the Y-axis direction, so that the embroidery object contains the embroidery data. An embroidery pattern based on this is created.

  Reference numeral 13 denotes an embroidery control unit. The control unit 13 has a unit box 13A fixed on the base 1 as shown in FIG. 2, and a liquid crystal is provided on the front side of the unit box 13A. A display 14 composed of a display or the like, and a control panel 15 positioned below the display 14 are provided. Further, for example, an arithmetic processing unit 16 (CPU) shown in FIG. 1 is provided in the unit box 13A.

  Here, the control panel 15 is provided with a plurality of selection switches 15A to 15D and the like as illustrated in FIG. Then, the operator operates these selection switches 15A to 15D, for example, selects embroidery data with the selection switch 15A, and specifies the color of the embroidery pattern with the selection switch 15B. In addition, a cloth such as an embroidery cloth is designated by operating the selection switch 15C, and a sewing speed is selectively designated by operating the selection switch 15D.

  The control unit 13 includes a storage unit (not shown) made of, for example, a ROM, a RAM, and the like. Further, as illustrated in FIG. 1, the control unit 13 includes a yarn length calculation unit 17 that calculates a yarn length for each color based on the selected embroidery data, and a yarn feed speed calculation unit that calculates a yarn feed speed. 18 and a sewing machine controller 19 and the like.

  Then, the sewing machine controller 19 drives and controls the spindle motor on the head unit 2 side based on the embroidery data to move the sewing needle 7, and the frame driving device 12 moves the holding frame 12A of the embroidery cloth. Thus, operation control for creating an embroidery pattern is performed.

  Reference numeral 20 denotes a dyeing box provided on the back side of the base 1, and the dyeing box 20 is formed of a substantially rectangular box as shown in FIG. In the dyeing box 20, a yarn dyeing portion 21, a yarn driving portion 27, a yarn accumulating portion 28, etc., which will be described later, are accommodated as shown in FIGS. Further, as shown in FIG. 2, a thread insertion hole 20A is formed on the upper surface side of the dyeing box 20, and this thread insertion hole 20A allows the upper thread (dyed thread S) to be described later to be threaded from inside the dyeing box 20. It is sent out in the direction of arrow e in FIG. 2 toward the road guide 9 side.

  21 is a yarn dyeing portion provided in the dyeing box 20, and the yarn dyeing portion 21 has, for example, four ink jet portions 22A, 22B, 22C, and 22D, as shown in FIGS. Ink jet sections 22A, 22B, 22C, and 22D of the ink tanks 23A, 23B, 23C, and 23D provided outside the dyeing box 20 are individually inks (for example, cyan C, magenta M, yellow Y, and black B). Is supplied.

  Then, the inkjet units 22A, 22B, 22C, and 22D create the dyed yarn S having, for example, 256 stages or more of color tone and hue by ejecting each ink toward the upper yarn in accordance with dyeing data described later. It is possible to reproduce a combination of colors as many as 4.3 billion colors by combining the ejection amounts of the four colors of ink.

  Further, the yarn dyeing unit 21 is provided with a water supply unit 24 located on the upstream side of the ink jet unit 22A, and the water supply unit 24 supplies water so that moisture is soaked into the upper yarn before dyeing, Alternatively, a known fixing agent is impregnated in the upper thread. As a result, the water supply unit 24 can smoothly and stably dye the upper thread with the ink ejected from the inkjet units 22A to 22D.

  Further, the yarn dyeing unit 21 is provided with a drying roller 25 located on the downstream side of the ink jet unit 22D, and the drying roller 25 has an upper thread (that is, dyed with ink ejected from the ink jet units 22A to 22D). The dyed yarn S) is wound about 1 to 3 turns with the yarn driving unit 27 described later. Then, the drying roller 25 heats the dyed yarn S at this time on the roller surface or the like, thereby drying and fixing the ink to the dyed yarn S at an early stage. The heating temperature by the drying roller 25 is controlled by the temperature controller 26 shown in FIG. 1 through the arithmetic processing unit 16 of the control unit 13.

  Reference numeral 27 denotes a yarn driving unit provided in the dyeing box 20, and the yarn driving unit 27 is configured by using a plurality of rubber rollers 27A, 27B,... As shown in FIGS. It is arranged at a position below the yarn dyeing portion 21. Then, the yarn driving section 27 rotationally drives the rubber rollers 27A, 27B,... With an electric motor (not shown), etc., for example, so that the upper yarn to be dyed wound on the upper yarn bobbin 8A is thread-guided 9 To drive into the dyeing box 20 in the direction of arrow c. Thereby, the upper thread to be dyed is guided so as to move sequentially along the water supply unit 24, the inkjet units 22A to 22D, and the drying roller 25, and the upper thread after dyeing (dyed yarn S) is a yarn described later. It is continuously supplied toward the reservoir 28.

  Reference numeral 28 denotes a thread reservoir provided in the dyeing box 20, and the thread reservoir 28 is interlocked with the thread drive section 27 and swings left and right like a pendulum, and the thread Between the placement belt 30 for the dyed yarn S, which is arranged extending horizontally below the swing lever 29, and the placement belt 30 between the driven pulley 31 and the direction indicated by the arrow d in FIGS. The drive pulley 32 is driven slowly, and the speed reduction mechanism 33 for driving the drive pulley 32 at a slow speed that is greatly reduced.

  Here, the speed reduction mechanism 33 is constituted by, for example, a worm gear type speed reducer or the like, and a flexible rotation transmission tool 34 (for example, a belt, a wire, a chain) or the like by an electric motor (not shown) on the yarn drive unit 27 side. Driven through. The dyed yarn S is placed on the placing belt 30 of the yarn accumulating portion 28 so that the dyed yarn S continuously hangs down (free fall) with a substantially constant swinging width left and right by the yarn swing lever 29. The

  Thus, the dyed yarn S is stored with a sufficient yarn length so as to draw a zigzag pattern (see FIG. 7) on the placement belt 30. Further, the dyed yarn S at this time can be reduced by being affected by static electricity or the like by stringing using the yarn swing lever 29 or the like.

  In addition, a guide roller 35 is disposed, for example, above the driven pulley 31 at a position on the downstream side of the mounting belt 30, and the guide roller 35 is dyed on the mounting belt 30 and collected. A guide groove 35A for guiding the yarn S upward from the leading side is formed as an annular groove. Then, the dyed yarn S collected on the placing belt 30 is moved in the direction indicated by the arrow e in FIGS. 3 to 5 and 8 when the balance 6 and the like are driven on the head 2 side. It will be sent out.

  Reference numeral 36 denotes a color detection unit that detects the color of the dyed yarn S. The color detection unit 36 is provided in the needle bar case 4 as shown in FIG. 3, for example, and is fed from the balance 6 toward the sewing needle 7. The color of the dyed yarn S is detected by a non-contact optical sensor (for example, an image sensor such as a CCD). The color detection unit 36 is connected to the input side of the sewing machine controller 19 shown in FIG. 1 and outputs a detection signal to the sewing machine controller 19.

  Reference numeral 37 denotes a yarn winding device for winding an unnecessary portion of the dyed yarn S. The yarn winding device 37 is located on the back side of the sewing needle 7 as shown in FIG. Of the dyed yarn S provided in the case 4 and threaded through the sewing needle 7, for example, the yarn is wound to discard the yarn portion that is insufficiently dyed on the tip side.

  Here, the yarn winding device 37 is connected to the output side of the sewing machine controller 19 as shown in FIG. 1, and is driven and stopped in accordance with a control signal from the sewing machine controller 19. That is, the sewing machine controller 19 detects the color of the dyed yarn S by the color detection unit 36 and is unnecessary among the dyed yarn S threaded through the sewing needle 7 so that the desired color is at an appropriate position of the embroidery pattern. The yarn portion to be wound is wound on the yarn winding device 37 side.

  Then, the sewing machine controller 19 determines that the dyed yarn S is in a good dyeing state, for example, the color of the embroidery data and the color of the dyed yarn S from the transition of the color of the dyed yarn S based on the detection signal from the color detection unit 36. When it can be determined that they match, the middle portion of the yarn wound on the yarn winding device 37 side of the dyed yarn S threaded through the sewing needle 7 is cut by a thread trimming mechanism (not shown) or the like. At the same time, the drive of the yarn winding device 37 is stopped. As a result, the embroidery operation can be started on the head portion 2 side of the embroidery machine using the dyed yarn S threaded through the sewing needle 7 at this time.

  Next, reference numeral 38 in FIG. 1 denotes a staining data forming unit. The staining data forming unit 38 is connected to the arithmetic processing unit 16 of the control unit 13 and includes color information of embroidery data output from the arithmetic processing unit 16. Based on this, staining data is formed. The dyeing data formed by the dyeing data forming unit 38 is output to the ink jet driver 39 shown in FIG. 1, and the ink jet driver 39 controls the operation of the yarn dyeing unit 21.

  That is, the ink jet sections 22A to 22D (see FIG. 4) of the yarn dyeing section 21 are controlled to be ejected via the ink jet driver 39 by the dyeing data at this time, for example, cyan C, magenta M, yellow Y, and black B ink. Inject selectively toward the upper thread. As a result, the dyed yarn S is dyed in a color condition and tone corresponding to the dyed data formed by the dyeing data forming unit 38.

  A control unit 40 accommodates a plurality of control panels and the like, and the control unit 40 is disposed in the staining box 20 or on the back side of the base 1 as shown in FIG. The control unit 40 is provided with, for example, a motor driver for driving and controlling the spindle motor, a motor driver for the frame driving device 12, a motor driver for the yarn driving unit 27, the inkjet driver 39, and the like. . Further, for example, an electrical component 41 is provided on the opposite side of the control unit 40 across the yarn accumulating portion 28, and various electrical components used in the dyeing embroidery machine are arranged in the electrical component 41.

  The dyeing embroidery machine according to the present embodiment has the above-described configuration. Next, the operation thereof will be described.

  First, when starting the embroidery work, when the operator operates the control panel 15 of the control unit 13, for example, the embroidery data is selected by operating the selection switch 15A shown in FIG. 1, and desired pattern information is read. Next, the color of each pattern portion of the embroidery pattern is designated by operating the selection switch 15B. Further, by operating the selection switch 15C, a fabric such as an embroidery cloth is specified, and by operating the selection switch 15D, a sewing speed is sequentially specified.

  As a result, the arithmetic processing unit 16 of the control unit 13 uses the yarn length calculation unit 17 to calculate the yarn length (yarn length of the dyed yarn S) necessary for creating the embroidery pattern based on the selected embroidery data. The yarn feed speed calculation unit 18 calculates the yarn feed speed. Further, the dyeing data forming unit 38 calculates and forms dyeing data corresponding to the pattern designated by the color as described above, and outputs this dyeing data to the ink jet driver 39.

  On the other hand, between the rubber rollers 27A and 27B of the yarn drive unit 27, for example, the upper yarn to be dyed from the upper yarn bobbin 8A of the thread stand 8 shown in FIGS. To the yarn dyeing part 21 in the direction indicated by the arrow c in FIGS. Then, after the upper thread that has passed between the rubber rollers 27A and 27B of the yarn driving unit 27 is led to the yarn accumulating portion 28 side in a direction indicated by an arrow c, the upper yarn is guided to the yarn accumulating portion 28 side, and the leading end of the upper yarn is the guide roller 35 of the yarn accumulating portion 28. 3 is drawn upward in the direction indicated by the arrow e in FIG. 3 and sent out from the yarn insertion hole 20A (see FIG. 2) of the dyeing box 20 toward the yarn path guide 9 side.

  Next, the leading end side of the upper thread pulled out from the dyeing box 20 is guided in the direction indicated by the arrow f in FIG. 3 from the yarn path guide 9 toward the thread tensioner 10 and the thread tension 11 of the thread tension table 5. The preparatory operation is completed by threading the needle thread (not shown) of the sewing machine needle 7 through the balance 6 with the upper thread set in the thread tensioner 10, the thread tension 11 and the like. Is done.

  Next, when the operation of the yarn driving unit 27 is started in this state, the upper yarn to be dyed is fed out from the upper yarn bobbin 8A of the thread stand 8 in accordance with the rotation of the rubber rollers 27A, 27B, etc. Then, the upper yarn is continuously supplied (yarn feed) from the yarn dyeing portion 21 side toward the yarn accumulating portion 28 side in the direction of arrow c.

  At this time, the water supply unit 24 of the yarn dyeing unit 21 supplies water so that moisture is soaked into the upper yarn before dyeing, or impregnates the upper yarn with a known fixing agent. The reason why water is soaked into the upper thread before dyeing is to make it easier to mix the ejected inks of different colors, and has the effect of eliminating color unevenness. Then, the ink jet units 22A to 22D selectively eject ink (for example, cyan C, magenta M, yellow Y, and black B) instructed by the staining data toward the upper yarn in a wet state. As a result, the dyed yarn S is dyed in a color condition and tone corresponding to the dyeing data formed by the dyeing data forming unit 38.

  Further, on the downstream side of the yarn dyeing portion 21, the upper yarn (dyed yarn S) dyed with the ink ejected from the ink jet portions 22A to 22D is continuously heated on the roller surface of the drying roller 25, etc. The ink adhering to and dyeing the ink is quickly dried and fixed. In this case, the heating temperature by the drying roller 25 can be controlled via the arithmetic processing unit 16 of the control unit 13 by the temperature controller 26 shown in FIG.

  Next, the dyed upper yarn (dyed yarn S) is continuously supplied toward the yarn accumulating portion 28 by the yarn driving portion 27 shown in FIG. 4, and the yarn accumulating portion 28 is interlocked with the yarn driving portion 27. The dyed yarn S is placed so as to fall freely toward the placing belt 30 disposed below the yarn while the yarn is being swayed by the yarn swing lever 29 that is swung in the left and right directions. As a result, the dyed yarn S is stored with sufficient slack and yarn length so as to draw a zigzag pattern (see FIG. 7) on the placement belt 30.

  Then, when the main shaft motor on the head portion 2 side is rotationally driven with the dyed yarn S sufficiently accumulated on the placement belt 30 in this way, the sewing needle 7 on the needle bar case 4 side moves up and down. At the same time, the embroidery pattern is sewn and the upper thread is fed. For this reason, the dyeing yarn 20 on the placing belt 30 is pulled out in the direction indicated by the arrow e in FIG. 3 while the leading end side of the dyed yarn S is drawn upward via the downstream guide roller 35 (guide groove 35A). 3 toward the yarn path guide 9, the thread tensioner 10 of the thread tension table 5, and the thread tension 11 in the direction indicated by the arrow f in FIG. 3.

  At this time, the color detector 36 provided on the needle bar case 4 detects the color of the dyed yarn S fed from the balance 6 toward the sewing needle 7 and outputs a detection signal to the sewing machine controller 19. The sewing machine controller 19 calculates the length of the dyed yarn that is actually used, winds up the unnecessary portion on the yarn winding device 37 side, and discards the yarn at this time to the outside.

  Further, when it is determined from the signal from the color detection unit 36 that the dyeing state of the dyed yarn S is good and the color of the embroidery data matches the color of the dyed yarn S, the thread is passed through the sewing needle 7. The dyed yarn S is cut from the leading end side to the middle portion of the yarn wound on the yarn winding device 37 side by a yarn cutting mechanism (not shown) and the drive of the yarn winding device 37 is stopped.

  Thereby, on the head part 2 side of the embroidery machine, the embroidery work can be started using the dyed yarn S threaded through the sewing needle 7 at this time. The sewing machine controller 19 drives and controls the spindle motor on the head unit 2 side based on the embroidery data to move the sewing needle 7, and the frame driving device 12 moves the holding frame 12A of the embroidery cloth. Thus, a desired embroidery pattern can be realized.

  Further, when the color of the dyed thread S changes during the creation of the embroidery pattern, under-sew control is performed so that the part of the dyed thread S is sewn under the pattern, and the color change part of the dyed thread S is applied to the surface of the embroidery pattern. Prevent exposure. Thereby, it is possible to suppress the finished state of the embroidery pattern from being affected by the color change portion (color change portion) of the dyed yarn S, and the embroidery quality can be improved.

  Further, when the upper thread is dyed by the above-described yarn dyeing unit 21, for example, a true red color and a black color may not always be dyed into a beautiful color. However, in such a case, the upper thread bobbins 8 </ b> B and 8 </ b> C of the thread stand 8 may be set in advance with upper threads of pure red and black. At the time of embroidery work, one of the upper threads (including the dyed thread S) wound around the upper thread bobbins 8A, 8B, and 8C is selected by the color changing mechanism, and the selected upper thread is pulled out by the balance 6 or the like. In this way, an embroidery pattern can be created for an embroidery object such as an embroidery cloth.

  By the way, when the sewing machine needle 7 is moved on the head portion 2 side of the sewing machine to create an embroidery pattern, the thread consumption speed (sewing speed) increases or decreases depending on the pattern and shape of the embroidery pattern. And it's not a constant speed. On the other hand, the speed at which the upper thread is dyed on the side of the yarn dyeing portion 21 (hereinafter referred to as the dyeing speed) may cause color unevenness and the like if it is not always kept constant. is there.

  For this reason, a speed difference occurs between the sewing speed on the head portion 2 side and the dyeing speed on the yarn dyeing portion 21 side. The yarn feeding speed on the yarn dyeing portion 21 side is set so that the yarn feeding speed on the head portion 2 side is always maintained at a constant speed without being influenced by the head portion 2 side where the sewing speed varies. It is necessary to perform control so that the speed is set higher than the speed.

  Therefore, in the present embodiment, a thread pool portion 28 is provided in the middle of the yarn path located between the head portion 2 and the yarn dyeing portion 21, and the upper yarn dyed yarn S dyed by the yarn dyeing portion 21 is used as the yarn. By temporarily accumulating on the mounting belt 30 of the accumulation part 28, the speed difference between the sewing speed on the head part 2 side and the dyeing speed on the yarn dyeing part 21 is absorbed.

  That is, the dyed upper thread (dyed yarn S) continuously supplied toward the yarn accumulating portion 28 by the yarn driving portion 27 shown in FIG. 4 swings left and right in conjunction with the yarn driving portion 27. Then, the yarn is wound by the yarn swing lever 29 and placed on the placement belt 30 disposed below it so as to fall freely. As a result, the dyed yarn S can be stored on the placing belt 30 with sufficient slack and yarn length so as to draw a zigzag pattern as shown in FIG.

  Then, when the spindle motor on the head portion 2 side is rotationally driven in a state where the dyed yarn S is sufficiently accumulated on the placement belt 30 as described above, the balance 6 on the needle bar case 4 side is moved up and down. Since the dyed yarn S is fed toward the sewing needle 7, problems associated with the speed difference between the sewing speed on the head portion 2 side and the dyeing speed on the yarn dyeing portion 21 can be eliminated.

  Accordingly, on the head unit 2 side of the dyeing embroidery machine, the dyed yarn S stored in advance in the yarn accumulating unit 28 can be continuously supplied to the sewing needle 7 side through the balance 6 and the like. The side sewing speed can be controlled at the original high speed, and an efficient embroidery operation can be realized.

  Further, the dyed yarn S is spun on the placement belt 30 of the yarn accumulating portion 28 by a yarn swing lever 29 that is swung in the left and right directions, and is freely placed on the placement belt 30 disposed below the dyed yarn S. Since the dyed yarn S is placed so as to fall, it is possible to prevent the dyed yarn S from being entangled with each other due to the influence of static electricity or the like on the placement belt 30, and the slack and yarn sufficient to draw a zigzag pattern as shown in FIG. Can be stored with length.

  As a result, the dyed yarn dyed according to the predetermined color order in the yarn dyeing portion 21 is directed from the head side toward the head portion 2 side in the direction of arrow e through the guide roller 35 (guide groove 35A) on the downstream side. Can be sent out continuously. Accordingly, the dyed yarn S can be smoothly supplied from the yarn accumulating portion 28 to the head portion 2 side in accordance with the color order of the dyed yarn S (for example, the order of dyeing of yellow, red, green, etc.). An embroidery pattern according to the information can be realized.

  Therefore, according to the present embodiment, the upper yarn dyed yarn S dyed by the yarn dyeing portion 21 is temporarily accumulated in the yarn accumulating portion 28, thereby affecting the variation in the sewing speed on the head portion 2 side. Therefore, the yarn feeding speed on the yarn dyeing portion 21 side can be made constant, and a dyed yarn having no dyeing unevenness can be produced efficiently. Further, the sewing speed on the head portion 2 side can be controlled at the original speed, and an efficient embroidery operation can be realized. By using such a dyed thread S, a multicolored embroidery pattern corresponding to the embroidery data can be realized continuously.

  Next, FIG. 9 to FIG. 13 show a second embodiment of the present invention. The feature of this embodiment is that a thread winding drum is provided in a thread reservoir, and the thread winding drum spirally winds dyed yarn. By taking this, the dyed yarn is stored in a wound state. In the present embodiment, the same components as those in the first embodiment are denoted by the same reference numerals, and the description thereof is omitted.

  In the figure, 51 is a control box provided on the back side of the base 1, and in the control box 51, for example, the control unit 40 and electrical component 41 (see FIG. 4) described in the first embodiment, etc. Is provided. A support base 52 is provided on the upper surface side of the control box 51. On the support base 52, the thread stand 8, the yarn path guide 9, and the like serving as the upper thread storage portion described in the first embodiment. Is provided.

  In this case, a plurality of (for example, three) upper thread bobbins 8A, 8B, 8C and the like are also arranged on the thread stand 8 as shown in FIG. Further, a yarn dyeing portion 53, a yarn driving portion 58, a yarn accumulating portion 60 and the like which will be described later are provided on the support base 52.

  53 is a yarn dyeing portion provided on the support base 52. The yarn dyeing portion 53 is configured in substantially the same manner as the yarn dyeing portion 21 described in the first embodiment. For example, four ink jet portions 54A, 54B, 54C, 54D. Then, ink (for example, cyan C, magenta M, yellow Y, and black B) is individually supplied from the ink tanks 55A, 55B, 55C, and 55D shown in FIG. 10 to the inkjet units 54A to 54D.

  Further, the yarn dyeing unit 53 is provided with a water supply unit 56 (see FIG. 10) located on the upstream side of the ink jet unit 54A, and the water supply unit 56 includes the water supply unit 24 described in the first embodiment. Similarly, water is supplied so that moisture is soaked into the upper thread before dyeing, or a known fixing agent is impregnated into the upper thread. Further, the yarn dyeing portion 53 is provided with a drying roller 57 (see FIG. 9) located on the downstream side of the ink jet portion 54D, and the drying roller 57 heats the dyed yarn S on the roller surface or the like to supply ink. Dry and fix early.

  Reference numeral 58 denotes a yarn driving unit provided on the support base 52. The yarn driving unit 58 is configured by using a plurality of rubber rollers 58A, 58B, 58C and the like as shown in FIGS. It is arranged in the middle of the yarn path located between the yarn reservoir 60 and the yarn reservoir 60. The yarn driving unit 58 rotates the rubber rollers 58A, 58B, and 58C with an electric motor 65, which will be described later, so that, for example, the upper yarn to be dyed wound on the upper yarn bobbin 8A is threaded through the yarn path guide 9. It drives so that it may guide to the dyeing | staining part 53 side.

  Accordingly, the upper thread to be dyed is pulled out from the upper thread bobbin 8A of the thread stand 8 through the yarn path guide 9 in the direction indicated by the arrow c in FIG. The upper yarn (dyed yarn S) after the dyeing is guided so as to move sequentially along the portions 54A to 54D and the drying roller 57, and is continuously supplied toward the yarn reservoir 60 described later.

  59 is a fixing bracket provided on the support base 52 between the yarn driving portion 58 and the yarn accumulating portion 60. The fixing bracket 59 sandwiches a gear train 66, which will be described later, as shown in FIG. A mounting plate 59A is provided, and rubber rollers 58A, 58B, and 58C of the yarn driving portion 58 are rotatably mounted on the mounting plate 59A. The rubber roller 58A and the like of the yarn driving unit 58 are rotationally driven via a gear train 66 by an electric motor 65 described later.

  Reference numeral 60 denotes a yarn accumulating portion provided on the support base 52 at the downstream side of the yarn driving section 58. The yarn accumulating section 60 is located on the support base 52 on the left and right sides as shown in FIGS. A thread winding drum 61 that is formed as a cylindrical drum extending in the direction and accumulates the dyed yarn S in a wound state; and the thread winding drum 61 is rotatably supported on a support base 52 via a drum shaft 61A. A drum support 62 that moves along a rail 63, which will be described later, and a yarn winding portion 71, which will be described later, winds the dyed yarn S around the yarn winding drum 61 in the direction indicated by the arrow D in FIG.

  Here, for example, a one-way clutch or the like is used so that the spool drum 61 cannot rotate in the direction of arrow D in FIG. 11 with respect to the drum shaft 61A and can rotate in the reverse direction (direction of arrow D1). It is good to install via. However, it is not always necessary to use an expensive one-way clutch or the like, and the point is that it is only necessary to smoothly wind and unwind (feed) the dyed yarn S around the yarn winding drum 61.

  Reference numerals 63 and 63 denote rails as guide members provided along the support base 52. The rails 63 are parallel to the drum shaft 61A in the left and right directions of the support base 52 (indicated by arrows in FIGS. 12 and 13). E direction), and arranged in the front and rear directions of the support base 52 with a gap. In these rails 63, a thread winding drum 61 is slidably disposed via a slider 64 described later.

  Reference numeral 64 denotes a slider that is displaced in the left and right directions of the support base 52 along each rail 63, and the lower end side of the drum support 62 is fixedly attached to the slider 64. The slider 64 is slowly slid and displaced in the direction of arrow E along the rail 63 together with the spool drum 61 and the drum support 62, and the dyed yarn S does not overlap the outer peripheral surface of the spool drum 61. It is intended to compensate for the spiral winding.

  Here, as shown in FIG. 11, the slider 64 is provided with a rack 64A at an intermediate height between the rail 63 and the drum shaft 61A. The rack 64A extends in parallel with the drum shaft 61A and the like. It meshes with a pinion 67B described later. The slider 64 is displaced in the length direction (axial direction) of the rack 64 </ b> A, that is, along the rail 63 in the direction of arrow E when the rotation of the pinion 67 </ b> B is transmitted to the rack 64 </ b> A.

  An electric motor 65 serves as a drive source for the yarn driving portion 58 and the yarn accumulating portion 60. The electric motor 65 is attached to a fixed bracket 59 as shown in FIG. The electric motor 65 rotationally drives a gear train 66 disposed between the fixed bracket 59 and the mounting plate 59A, thereby rotationally driving the rubber roller 58A and the like of the yarn driving unit 58 and a reduction gear mechanism. The worm gear 67A of 67 is rotationally driven. The reduction gear mechanism 67 decelerates the rotation of the worm gear 67A and transmits it to the pinion 67B.

  Here, the pinion 67B of the reduction gear mechanism 67 is detachably engaged with the rack 64A of the slider 64. When the rack 64A is engaged with the pinion 67B, the rotation of the pinion 67B is converted into the axial displacement of the rack 64A. Thus, the slider 64 is slowly displaced along the rail 63 at a slow speed together with the thread winding drum 61.

  Reference numeral 68 denotes an advancing / retreating mechanism for advancing / retreating the pinion 67B with respect to the rack 64A. The advancing / retreating mechanism 68 is constituted by, for example, an electromagnetic solenoid, and moves the lever 67C of the reduction gear mechanism 67 together with the pinion 67B in the direction of arrow F. . Thus, the advance / retreat mechanism 68 engages the pinion 67B of the reduction gear mechanism 67 with the rack 64A of the slider 64, or releases the engagement of both.

  When the meshing between the rack 64A and the pinion 67B is released by the advance / retreat mechanism 68, the displacement of the bobbin drum 61 and the drum support 62 along the rail 63 is stopped. At this time, the thread winding drum 61 can move in the direction opposite to the arrow E direction via the drum support 62 and the slider 64, and can return to the initial position for winding the dyed thread S around the thread winding drum 61. It is.

  Reference numeral 69 denotes a hollow guide shaft rotatably provided on the fixed bracket 59 and the mounting plate 59A. The guide shaft 69 is formed as a shaft made of a hollow pipe as shown in FIG. And are arranged on the same axis. The guide shaft 69 is rotated together with the gear train 66 by the electric motor 65, and this rotation is transmitted to a later-described yarn winding portion 71 via the clutch 70.

  Further, the dyed yarn S supplied and guided by the yarn driving unit 58 is inserted into the guide shaft 69, and the dyed yarn S is led out to the yarn winding unit 71 while extending in the guide shaft 69 in the axial direction. Is done. As shown in FIG. 13, the end portion of the guide shaft 69 facing the drum shaft 61 </ b> A constitutes a supply port 69 </ b> A for the dyed yarn S for the yarn winding portion 71.

  Reference numeral 71 denotes a yarn winding portion for winding the dyed yarn S around the yarn winding drum 61. The yarn winding portion 71 is provided on the outer peripheral side of the guide shaft 69 and transmits the rotation of the guide shaft 69 via the clutch 70 as shown in FIG. The rotating body 72, the base end side fixed to the rotating body 72, the distal end side bent toward the outer peripheral side of the bobbin drum 61 and bent into an L shape, and fixed to the rotating arm 73. And a cylindrical winding tool 74 that extends in parallel with the outer peripheral surface of the yarn winding drum 61.

  Then, when the rotation of the guide shaft 69 is transmitted to the rotating body 72 via the clutch 70, the thread winding unit 71 rotates the winding tool 74 in the direction indicated by the arrow D in FIG. The dyed yarn S introduced into the winding tool 74 from the supply port 69A of the guide shaft 69 is sequentially wound around the outer peripheral surface of the yarn winding drum 61 as the arrow D rotates. At this time, the spool drum 61 moves slowly together with the slider 64 in the direction of arrow E in FIG.

  Therefore, the dyed yarn S is spirally wound around the outer peripheral surface (drum surface) of the yarn winding drum 61 as shown in FIG. 13, and the dyed yarns S can be prevented from overlapping each other on the drum surface. On the drum surface of the yarn winding drum 61, the dyed yarn S is stored with a sufficient yarn length in a spirally wound state without overlapping each other.

  On the other hand, when the dyed yarn S is fed out (wound out) from the yarn winding drum 61 in the direction indicated by the arrow e in FIGS. 11 and 13, the electric motor 65 is stopped and the clutch 70 is released. As a result, the rotating body 72 of the yarn winding portion 71 is placed in a free state in which it can rotate relative to the guide shaft 69. When the thread winding drum 61 is rotated in the direction indicated by the arrow D1 in FIG. 11 in order to feed the dyed yarn S from the thread winding drum 61, the rotating body 72, the rotating arm 73 and the winding of the thread winding portion 71 are accompanied with this. The tool 74 also rotates in the same direction as the thread winding drum 61.

  Thus, also in the present embodiment configured as described above, the dyed yarn S is spirally wound around the yarn winding drum 61 of the yarn accumulating portion 60 provided between the yarn dyeing portion 53 and the head portion 2, and sufficient yarn is obtained. The dyed yarn S can be temporarily stored with the length, and the same effects as those in the first embodiment can be obtained.

  In particular, in the present embodiment, the dyed yarn S is spirally wound by the yarn winding drum 61 provided in the yarn accumulating portion 60, and the dyed yarn S is stored in a wound state. The dyed yarn S can be sent out from the head side toward the head part 2 (yarn path guide 9) in order according to the color order.

  Then, by collecting the dyed yarn S around the spool drum 61, it is possible to prevent problems such as the dyed yarns S being entangled in the middle, and smoothly sending the dyed yarn S toward the head portion 2 side. Can be done. Further, on the head portion 2 side, the dyed yarn S guided from the yarn winding drum 61 in the direction of arrow e in FIG. 10 is supplied from the yarn path guide 9 to the sewing needle 7 through the balance 6 in the direction of arrow f. Can do.

  In the above embodiment, the case where one head portion 2 is provided on the sewing machine base 1 has been described as an example. However, the present invention is not limited to this. For example, the present invention may be applied to a multi-head embroidery machine having a plurality of head portions mounted on a base.

  Further, in the above-described embodiment, the three types of upper thread bobbins 8A, 8B, 8C are provided on the thread stand 8, and three balances 6 and sewing needles 7 are provided on the needle bar case 4, respectively. The embroidery machine has been described as an example. However, the present invention is not limited to this. For example, the present invention may be applied to a dyeing embroidery machine in which a needle bar case is provided with one balance and a sewing needle.

It is a control block diagram of the dyeing type embroidery machine according to the first embodiment of the present invention. 1 is a perspective view showing a dyeing embroidery machine according to a first embodiment. FIG. 3 is a partially broken side view of the dyeing embroidery machine as seen from the direction of arrows III-III in FIG. 2. FIG. 4 is a partially cutaway rear view of the inside of the staining box as seen from the direction of arrows IV-IV in FIG. 2. FIG. 4 is an essential part cross-sectional view showing an enlargement of a yarn accumulating part in FIG. 3. It is sectional drawing which looked at the thread | yarn accumulation part from the arrow VI-VI direction in FIG. It is the top view which looked at the thread | yarn accumulation part from the arrow VII-VII direction in FIG. It is sectional drawing which looked at the thread | yarn accumulation part from the arrow VIII-VIII direction in FIG. It is a perspective view which shows the dyeing | staining type embroidery machine by 2nd Embodiment. FIG. 10 is a partially cutaway side view of the dyeing embroidery machine as seen from the direction of arrows XX in FIG. 9. It is principal part sectional drawing which expands and shows the thread | yarn accumulation part in FIG. It is the top view which looked at the thread | yarn accumulation part from the arrow XII-XII direction in FIG. It is sectional drawing which looked at the thread | yarn accumulation part from the arrow XIII-XIII direction in FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Base 2 Head part 3 Head main body 4 Needle bar case 5 Thread tension stand 6 Balance 7 Sewing needle 8 Thread stand (upper thread storage part)
8A, 8B, 8C Upper thread bobbin 9 Thread guide 11 Thread tension 12 Frame drive device 13 Control unit 21, 53 Thread dyeing part 27, 58 Thread drive part 28, 60 Thread accumulation part 29 Thread swing lever 30 Loading belt 35 Guide Roller 52 Support base 61 Thread winding drum 71 Thread winding portion S Stained yarn

Claims (3)

An embroidery base, a head portion mounted on the base and provided with a sewing needle and a balance; an upper thread storage portion for storing an upper thread to be supplied to the sewing needle through the balance of the head portion; In a dyeing embroidery machine provided with a yarn dyeing part that is provided in the middle of a yarn path positioned between an upper thread storage part and the head part and dyes the upper thread,
Between the yarn dyeing portion and the head portion, the upper yarn dyed by the yarn dyeing portion is temporarily stored, and the sewing speed on the head portion side using a sewing needle and the yarn dyeing portion A thread pool part that absorbs the speed difference from the dyeing speed at
The dyeing embroidery machine is characterized in that the head portion is configured to supply the dyed yarn previously stored in the yarn accumulating portion to a sewing needle side through the balance.   2. The dyeing embroidery machine according to claim 1, wherein the yarn pool portion is configured to send the dyed yarn sequentially dyed in the yarn dyeing portion from the head side toward the head portion side.   The yarn accumulating portion includes a yarn winding drum that winds the dyed yarn in a spiral shape to collect the dyed yarn in a wound state, and the dyed yarn wound around the yarn winding drum is sequentially The dyeing embroidery machine according to claim 1, wherein the dyeing embroidery machine is configured to send out toward the head portion side.

Images