JP2008173480A - Cloth pressing member elevating/lowering device of embroidery machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To adjust the height of a cloth pressing member and to easily perform exchange work when exchanging a sewn object or a sewing frame. <P>SOLUTION: The cloth pressing member elevating/lowering device of an embroidery machine includes: a sewing machine arm provided with an upper shaft for providing drive force; a cloth pressing member driving cam mounted on the outer peripheral surface of the upper shaft; a transmission member connected to the cloth pressing member driving cam to be swung; a cloth pressing member driving lever connected to the transmission member and turned in the vertical direction around a prescribed turning point; and a cloth pressing member driving unit for elevating and lowering the cloth pressing member in the vertical direction while reciprocating along a needle bar guide shaft according to the amount of turning of the cloth pressing member driving lever. The cloth pressing member elevating/lowering device further includes a cloth pressing member height adjuster for adjusting the height of the cloth pressing member by displacing the turning point of the cloth pressing member driving lever. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to an embroidery sewing machine, and more particularly to a cloth material presser lifting device for an embroidery sewing machine.

  In general, an embroidery sewing machine (embroidery machine) has two axes in which an embroidery frame on which a cloth material is fixed horizontally moves in the x-axis direction and the y-axis direction while the needle bar of a sewing machine capable of making needles moves up and down. This is a position determination controller.

  In such an embroidery sewing machine, the embroidery frame on which the cloth material is fixed is sewn while moving in the x-axis and y-axis directions. Therefore, the accuracy and constant speed of embroidery frame movement contribute to the quality of embroidery. Has close linkage.

  Therefore, as a power source for driving the vertical movement of the needle bar of the embroidery sewing machine, a servo motor or an induction motor capable of controlling the speed is used as a power source for moving the embroidery frame in the x-axis and y-axis directions. In general, a stepping motor having a good position determining power and easy to control is used.

  The embroidery machine has a sewing frame movably installed on a table, and a cloth presser member, which will be described later, is supported at the bottom dead center position during sewing processing, and a top dead center position higher than the bottom dead center position. And a lifting device for retracting the cloth pressing member.

  FIG. 1 is a perspective view and a partially enlarged view showing an example of an embroidery sewing machine, and FIG. 2 is a perspective view showing a cloth material pressing member driving structure of a conventional embroidery sewing machine. As shown in FIG. 1, a large number of sewing heads are installed along the longitudinal direction on the front surface of the sewing machine 1. The sewing machine head is provided with a needle bar support case 4 having a large number of cloth material pressing members 5 on the front surface of the sewing machine arm 3.

  The cloth presser member 5 has a structure that can be rotated up and down in conjunction with the needle bar 8 shown in FIG. 2, and a motor (not shown) for supplying power is provided at one side lower part of the embroidery sewing machine table. An upper shaft 6 that is connected to a control unit that controls operation and is connected to the motor to provide a driving force penetrates the side surface of the sewing machine arm 3.

  Further, a cloth presser member drive cam 10 is mounted on the outer peripheral surface of the upper shaft 6, and a transmission composed of a cam roller 9 and a cloth presser member drive lever 11 is disposed in a locus groove of the cloth presser member drive cam 10. The members are coupled and swinging, and at the same time, rotate up and down around a predetermined rotation point.

  A needle bar guide shaft 7 is installed in the vertical direction on the front surface of the sewing machine arm 3, and a needle bar 8 is installed in parallel with the needle bar guide shaft 7 so as to penetrate the sewing machine head 4 in the vertical direction. The cloth presser member 5 described above is coupled to the lower end of the needle bar 8.

  Since the cloth presser member driving body 13 is connected to the outer peripheral surface of the needle bar guide shaft 7, the cloth presser member driving body 13 is moved to the needle bar guide by the amount of rotation of the cloth presser member driving lever 11. The cloth pressing member 5 is moved up and down while reciprocating along the outer peripheral surface of the shaft 7.

  At this time, the conventional cloth material pressing member 5 has a certain length bent in a staircase shape as a whole, so that it is difficult to adjust the height placed on the sewing product such as the cloth to be sewn. There was a problem.

  Further, in order to adjust the position of the cloth presser member 5, there is a troublesome problem that it is necessary to work after disassembling the sewing head 4 parts such as a head face plate (not shown). In FIG. 2, reference numeral 12 is a cloth material pressing member drive lever connecting link.

  The present invention has been made to solve the above-described problems of the prior art, and an object of the present invention is to provide a cloth material presser lifting device for an embroidery sewing machine capable of adjusting the height of the cloth presser member. There is to do.

  Another object of the present invention is to provide a cloth material pressing member lifting / lowering device for an embroidery sewing machine that can be easily replaced when a sewing product or a sewing frame is replaced.

  An object of the present invention as described above is to a sewing machine arm having an upper shaft for providing a driving force, a cloth material pressing member driving cam mounted on an outer peripheral surface of the upper shaft, and the cloth material pressing member driving cam. A coupled transmission member that swings, a cloth presser drive lever that is coupled to the transmission member and pivots up and down around a predetermined pivot point, and a rotation amount of the fabric presser member drive lever A cloth presser member drive lever for an embroidery sewing machine, comprising: a cloth presser member drive body that moves the cloth presser member up and down while reciprocating along a needle bar guide shaft. This is achieved by a cloth presser member lifting / lowering device for an embroidery sewing machine that further includes a cloth presser member height adjusting device that adjusts the height of the cloth presser member by displacing the rotation point.

  The cloth presser member height adjusting device includes a drive motor for generating power, a drive pulley coupled to the drive motor via a shaft, a driven pulley connected to the drive pulley and rotating, and the driven An eccentric member installed penetrating the pulley laterally, and a cloth pressing member driving lever having a pivot point connected to the eccentric member by a hinge can be included.

  The apparatus of the present invention may further include an eccentric member supporting means that is installed adjacent to the driven pulley and includes a hollow so that the eccentric member is penetrated and supported.

  The eccentric member includes large and small protrusions on both side surfaces of the cylindrical main body, the small protrusions are connected to the hinge hole of the cloth pressing member driving lever, and the large protrusion penetrates the eccentric member supporting means. And can be connected to the driven pulley.

  The cloth presser member height adjusting device may be capable of adjusting the height of the bottom dead center according to the thickness of the sewing product.

  The cloth presser member height adjusting device can adjust the bottom dead center position to a height programmed by the thickness of the sewing product.

  As described above, according to the present invention, there is an effect that the height of the cloth pressing member can be adjusted by the kind or thickness of the sewn product.

  In addition, when an operator replaces a sewing product or a sewing frame, the replacement work can be easily performed by retracting the cloth material pressing member to a top dead center position higher than the bottom dead center position manually or automatically. There is an effect that can be done.

  Furthermore, there is an effect that the troublesomeness of having to disassemble a sewing machine head component such as a head face plate for adjusting the position of the cloth pressing member is eliminated.

  DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An apparatus for raising and lowering a cloth material pressing member for an embroidery sewing machine according to the present invention will be described below in detail with reference to the accompanying drawings.

  Fig. 3a is a perspective view showing the installation state of the fabric material pressing member lifting device for the embroidery sewing machine according to one embodiment of the present invention, Fig. 3b is an enlarged view of the 'A' portion of Fig. 3a, and Fig. 4 is the fabric material pressing device according to the present invention. It is a disassembled perspective view of a member raising / lowering apparatus.

  5a is a perspective view showing one side of the installation state of the present invention, FIG. 5b is an enlarged view of the 'B' portion of FIG. 5a, and FIG. 6 is a side view showing the operation state of the present invention. Referring to the figure, the cloth presser lifting device of the embroidery sewing machine according to the present invention is a cloth presser for adjusting the height of the presser member by displacing the rotation point of the cloth presser drive lever. Further comprising a member height adjusting device.

  The cloth presser member height adjusting device is for adjusting the height of the cloth presser member by displacing the rotation point of the cloth presser drive lever, as shown in FIGS. In general terms, the drive motor 40, a drive pulley 42 coupled to the drive motor 40 via a shaft, a driven pulley 43 that is connected to the drive pulley 42 and rotates, and penetrates the driven pulley 43. The eccentric member 45, and the cloth member pressing member drive lever 31 having a pivot point connected to the eccentric member 45 by a hinge.

  As shown in FIGS. 3a and 4, the drive motor 40 has a motor shaft protruding on one side and a front surface of a case housing the drive motor 40 via a connection bracket 41 having a U-shaped cross section when viewed from the side. Then, it is fastened to one side of the sewing machine arm 23 with a screw (not shown).

  The drive pulley 42 is attached on the motor shaft of the drive motor 40 and is connected to a driven pulley 43 having a larger diameter via a belt 46, and the eccentric member 45 has a hollow 44a. And is driven through the driven pulley 43.

  In the present invention, the drive pulley 42 and the driven pulley 43 are illustrated as being connected via a belt 46. However, unlike this, the drive pulley 42 and the driven pulley 43 are configured to directly mesh with each other. Is also possible.

  As shown in FIG. 4, the eccentric member 45 includes large and small protruding portions on both side surfaces of the cylindrical main body 45a, and the small protruding portion 45b protrudes in a state of being biased to one side from the center of the main body 45a. The large protrusion 45c is connected to the hinge hole 31a of the material pressing member drive lever 31 and penetrates the eccentric member support means 44 and the driven pulley 43 in the lateral direction.

  As shown in FIG. 4, the cloth pressing member drive lever 31 has a substantially 'V' cross section, has a hinge hole 31a at the center, and has large and small through holes 31b and 31c at both left and right ends. Then, the eccentric member 45 is provided with a shaft through the hinge hole 31a.

  As shown in FIG. 4, the transmission member in the present invention, that is, the cloth pressing member driving rod 30 in comparison with the cam roller 9 and the cloth pressing member driving lever 11 shown in FIG. 2, adheres to the outer peripheral surface of the upper shaft 26. Then, the flange portion is rotated together with the upper shaft 26, and one flange portion is connected to the through hole 31b of the cloth material pressing member driving lever 31, and the through hole 31c of the cloth material pressing member driving lever 31 is shown in FIG. 3b. As described above, the cloth material pressing member connecting link 34 is connected to one side protruding portion 34a, and the other side of the connecting link 34 slides up and down on the needle bar guide shaft 27 (FIG. 3a). Is fixedly attached to one side.

  Further, a cloth presser member driving holder 37 (FIG. 5b) installed in the cloth presser member drive body 33 is slidably installed along the outer peripheral surface of the needle bar 28. By driving 36, the cloth presser member drive shaft 32 installed in parallel with the needle bar 28 at the lower part of the cloth presser member drive holder 36 moves up and down to move the cloth presser member drive shaft 32. The cloth presser member 25 installed at the lower part of the head moves up and down.

  Reference numeral 33 shown in FIG. 3b and FIGS. 5a to 6 is a cloth pressing member driving body, which is a Korean patent application No. 10-2007-0005680 filed earlier by the present applicant (name of invention: embroidery machine) The structure and the drive mechanism of the cloth presser member 25 having the same structure and drive mechanism as the presser member drive body (reference numeral 26) disclosed in the presser member guide structure) and connected to the cloth presser member drive body 33 Is disclosed in detail in the earlier application and the priority claim application (Korean Patent Application No. 10-2007-0020471, title of invention: cloth material pressing member driving structure of embroidery sewing machine), Description is omitted.

  Below, the effect | action of this invention which has the above structures is demonstrated.

  As shown in FIG. 6, when the upper shaft 26 is rotated by receiving the power of a motor (not shown), the cloth material pressing member driving rod 30 rotates about the upper shaft 26, and at the same time, the cloth material. The cloth pressing member driving body 33 connected to the pressing member driving lever 31 via the connecting link 34 moves up and down repeatedly.

  A needle bar 28 connected to the lower part of the cloth presser member drive holder 36 engaged with the cloth presser member drive body 33 moves up and down inside the sewing machine head 34 and is parallel to the needle bar 28. The cloth presser member 25 connected to the lower end of the cloth presser member drive shaft 32 installed on the upper and lower parts also moves up and down.

  On the other hand, if it is necessary to raise the cloth pressing member 25 to a certain height, the driving pulley 42 is rotated by the counterclockwise operation of the driving motor 40, and this rotational force is transmitted via the belt 46. Thus, the rotational force due to this is transmitted to the cloth material pressing member drive lever 31 via the eccentric member support means 44 and the eccentric member 45.

  By transmitting the rotational force, the cloth pressing member driving body 33 is moved upward via the connecting link 34 connected to the cloth pressing member driving lever 31 to be engaged with the cloth pressing member driving body 33. The needle bar 28 connected to the combined cloth presser member drive holder 36 moves upward, and the cloth presser member 25 connected to the cloth presser drive shaft 32 also rises upward by a predetermined height. To do.

  On the other hand, when trying to lower the cloth pressing member 25 to a certain height, the rotational force due to the clockwise operation of the drive motor 40 is pressed through the connecting link 34. The member driving body 33 is moved downward, the needle bar 28 connected to the cloth pressing member driving holder 36 moves downward, and the cloth pressing member 25 connected to the cloth pressing member driving shaft 32 is also provided. Both descend downwards.

  As a result, it is possible to adjust the bottom dead center height of the cloth presser member 25 according to the thickness of the sewing product by the cloth presser member lifting device. That is, it is possible to adjust the height of the cloth presser member 25 while the rotational point of the cloth presser member drive lever 31 connected to the cloth presser member elevating device is displaced, When the sewing material is thick, the bottom dead center height of the cloth presser member 25 is raised by the lifting device, and when the sewing product is relatively thin, the bottom dead center height of the cloth presser member 25 is lowered by the lift device. Let the sewing work.

  On the other hand, if necessary, the drive motor 40 can be automatically controlled by a program according to the thickness of the sewing product. For example, when inputting the sewing pattern, after slightly moving the embroidery frame with the cloth material fixed in the x-axis and y-axis directions, manually check the position where the thickness of the sewing product changes, and at that position and at that position The height (or the number of drive pulses to the drive motor) of the cloth pressing member 25 according to the thickness of the sewn product is input as data, or the thickness of the sewn product is determined from the input data. Set the number of stitches until the position changes.

  In this case, when reaching the position where the thickness of the sewing product changes during sewing, the number of pulses (or when the predetermined number of stitches is reached) according to the height input to the drive motor 40. ) Can be automatically controlled at the bottom dead center position of the cloth pressing member 25.

  As mentioned above, although the cloth material pressing member raising / lowering device of the embroidery sewing machine by this invention was demonstrated based on exemplary drawing, this invention is not limited with the Example and drawing disclosed by this specification, The technique of the invention It goes without saying that various modifications can be made by those skilled in the art within the scope of the idea.

  INDUSTRIAL APPLICABILITY The present invention is applicable to a cloth presser member lifting / lowering device for an embroidery sewing machine that can adjust the height of a cloth presser member and can easily perform replacement work when replacing a sewing product or a sewing frame.

It is the perspective view and partial enlarged view which show an example of an embroidery sewing machine. It is a perspective view which shows the drive structure of the cloth material pressing member of the conventional embroidery sewing machine. It is a perspective view which shows the installation state of the cloth material pressing member raising / lowering apparatus of the embroidery sewing machine by one Example of this invention. FIG. 3B is an enlarged view of an ‘A’ portion of FIG. 3A. It is a disassembled perspective view of the cloth pressing member raising / lowering device by this invention. It is a one side perspective view which shows the installation state of this invention. FIG. 5B is an enlarged view of a portion “B” in FIG. It is a side view which shows the operation state of this invention.

Explanation of symbols

23 sewing machine arm 24 sewing machine head 25 cloth material pressing member 26 upper shaft 27 needle bar guide shaft 28 needle bar 30 cloth material pressing member driving rod 31 cloth material pressing member driving lever 32 cloth material pressing member driving shaft 33 cloth material pressing member driving body 34 Cloth material presser member connection link 35 Needle bar drive shaft 36 Cloth material presser member drive holder 40 Drive motor 41 Connection bracket 42 Drive pulley 43 Driven pulley 44 Eccentric member support means 45 Eccentric member 46 Belt

Claims (6)

A sewing machine arm having an upper shaft for providing a driving force, a cloth material pressing member driving cam mounted on the outer peripheral surface of the upper shaft, a transmission member coupled to the cloth pressing member driving cam and swinging; The cloth presser member driving lever connected to the transmission member and pivoting up and down around a predetermined pivot point and reciprocatingly moves along the needle bar guide shaft according to the pivoting amount of the cloth presser member driving lever. In the cloth presser member lifting and lowering device for the embroidery sewing machine, including a cloth presser member driving body that lifts and lowers the cloth presser member in the vertical direction,
A cloth material for an embroidery sewing machine, further comprising a cloth material pressing member height adjusting device for adjusting a height of the cloth pressing member by displacing a rotation point of the cloth pressing member driving lever. Presser member lifting device.   The cloth presser member height adjusting device includes a drive motor for generating power, a drive pulley coupled to the drive motor via a shaft, a driven pulley connected to the drive pulley and rotating, and the driven 2. The embroidery according to claim 1, comprising: an eccentric member installed through the pulley in a lateral direction; and a cloth material pressing member driving lever having a pivot point connected to the eccentric member by a hinge. A sewing machine cloth presser lifting device.   The embroidery sewing machine cloth according to claim 2, further comprising an eccentric member supporting means installed adjacent to the driven pulley and having a hollow so that the eccentric member is penetrated and supported. Material presser lifting device.   The eccentric member includes large and small protrusions on both side surfaces of the cylindrical main body, the small protrusions are connected to the hinge hole of the cloth pressing member driving lever, and the large protrusion penetrates the eccentric member supporting means. The cloth material pressing member lifting / lowering device for an embroidery sewing machine according to claim 3, wherein the apparatus is connected to the driven pulley.   3. The cloth presser member lifting / lowering device for an embroidery sewing machine according to claim 2, wherein the cloth presser member height adjusting device is capable of adjusting a height of a bottom dead center according to a thickness of a sewing product.   The cloth material presser for an embroidery sewing machine according to claim 1 or 5, wherein the cloth presser member height adjusting device adjusts a bottom dead center position to a height programmed according to a thickness of a sewing product. Member lifting device.

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