KR100810544B1 - Thread taking-up apparatus for an automatic embroidering machine - Google Patents

Abstract

The present invention relates to a thread take-up device for an automatic embroidery machine that tensions and relaxes a thread connected to a needle by a vertical reciprocating motion, and a thread take-up that swings up and down with respect to a rotation shaft by engaging a thread coupled to a rotation shaft and a rotation shaft. A crank member coupled to the unit, the rotation shaft to transfer the rotation drive movement of the thread take-up drive unit to the thread take-up unit, and elastically connected between the thread take-up unit and the crank member to integrally rotate the take-up unit and the crank member And an over-rotating means for rotating the thread take-up unit relative to the crank member by a predetermined angle against the elastic force of the spring. As a result, the thread take-up operation can be stabilized to prevent the short circuit of the thread, and the replacement work time of the thread can be shortened to improve work efficiency.

Description

THREAD TAKING-UP APPARATUS FOR AN AUTOMATIC EMBROIDERING MACHINE}

1 is a partially enlarged perspective view of an automatic embroidery machine equipped with a thread take-up device according to the present invention;

2 is a partially enlarged perspective view of the thread take-up device for an automatic machine according to the present invention;

3 is a side view of FIG. 2,

Figure 4 is an exploded perspective view of the thread take-up device of Figure 2,

5 and 6 are partially enlarged side view for explaining the operation of the thread take-up device for the automatic machine according to the present invention.

* Explanation of symbols for the main parts of the drawings

11: fixed frame 15: movable frame

17: seal supply 31: head assembly

33 headstem 37 guide tube assembly

39: 1st Information Hall 41: 2nd Information Hall

51: thread take-up device 53: rotating shaft

55: thread take-up unit 57: swing lever

59: thread hanging member 61: crank member                 

71: spring 81: over-rotating means

83: push rod 85: protrusion

87: Actuator 93: Link

The present invention relates to a thread take-up device for an automatic machine.

An automatic embroidery machine is a kind of automatic sewing machine that automatically embroiders a predetermined pattern or trademark by using a thread of various colors such as clothes, shoes, labels, etc., by means of a pre-woven program.

An improved automatic embroidery machine for selectively sewing and supplying different threads of upper thread to one needle of such automatic embroidery machine is disclosed in International Patent Application No. PCT / KR00 / 00917.

By the way, in such an automatic embroidery machine, the thread take-up device for tensioning and relaxing the thread connected to the needle has a thread-hanging member that catches the thread at its free end. The thread hanger member has a bottom dead center located at the rear of the guide tube assembly forming a single thread supply path so that the waiting thread is transferred to the needle work section during the replacement of the thread, and is located at the upper side of the front of the guide tube assembly. Always reciprocate the top dead center. The thread take-up device is connected to the main shaft motor as a drive unit of the thread take-up device, and the thread take-up device in which the thread take-up unit and the crank member are integrally formed by the drive of the main shaft motor rotates by a predetermined angle so that the thread hanger member of the thread take-up device is rotated by a predetermined angle. Reciprocates between the top dead center and the bottom dead center described above.

On the other hand, when the thread replacement member of the thread take-up device is located at the rear of the guide tube assembly, the thread to be replaced is supplied toward the needle through the guide tube assembly by the compressed air so that the end of the thread is threaded by the thread sewing device. It is made by binding to the needle.

Therefore, in order to prevent a collision between the thread take-up device and the guide tube assembly during the replacement of the thread, when the thread hanger member of the thread take-up device is located at the rear of the guide pipe assembly, the main shaft motor driving the thread take-up device at a low speed Rotated.

By the way, in such an automatic embroidery machine, when the thread hook member of the thread take-up device moves back and forth between the bottom dead center through the thread supply path during embroidery work, the thread caught by the thread hook member sags away from the thread hook member. There is a concern that the device may be entangled, and the thread hanger member may move from the bottom dead center toward the top dead center and the thread may be impacted and the thread may be broken. And, since the thread replacement work is performed when the thread hook member of the thread take-up device is located at the rear of the guide tube assembly, the spindle motor must be driven at a low speed at this time. There is a problem.

Accordingly, an object of the present invention is to provide a thread take-up device for an automatic embroidery machine which can stabilize a thread take-up operation to prevent short-circuit of the thread, and improve work efficiency by shortening the replacement time of the thread.

In order to achieve the above object, the present invention, the thread take-up device for an automatic embroidery machine for tensioning and relaxing the thread connected to the needle by the up and down reciprocating motion; A thread take-up unit coupled to the rotation shaft and configured to reciprocate up and down with respect to the rotation shaft by hanging a thread; A crank member coupled to the rotation shaft to transfer the rotation driving motion of the thread take-up driving unit to the thread take-up unit; A spring elastically connected between the thread take-up unit and the crank member to integrally rotate the thread take-up unit and the crank member; And an over-rotating means for rotating the thread take-up unit relative to the crank member by a predetermined angle against the elastic force of the spring.

Here, the over-rotating means, the push rod formed integrally with the rotating shaft; A protruding portion projecting from the thread take-up unit in parallel to the rotation shaft and being pressed and released by the push rod when the push rod is rotated; A linear reciprocating actuator; It is preferable to include a link connecting the actuator and the rotating shaft to rotate the rotating shaft by converting the linear reciprocating motion of the actuator into a rotational movement.

In addition, when the push rod presses the protrusion, the spring exerts an elastic force on the protrusion in the opposite direction to press, and when the push rod releases the protrusion, the protrusion is in its original position by the elastic force of the spring. It is preferable to return to.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.                     

1 is a partially enlarged perspective view of an automatic embroidery machine equipped with a thread take-up device according to the present invention. As shown in the figure, the automatic embroidery machine has a fixed frame 11 and a movable frame 15 supported by the fixed frame 11 so as to be reciprocally slidably moved horizontally along the guide rail 13. A sliding drive unit (not shown) is provided between the movable frame 15 and the fixed frame 11 to move the movable frame 15 side to side with respect to the fixed frame 11. In addition, a thread supply unit 17 is installed on the movable frame 15, and a head assembly 31 on which a needle work unit 35 is installed is coupled to a lower end of the fixed frame 11.

The thread supply unit 17 provided in the movable frame 15 includes a thread tension holding unit 19 for adjusting supply tension of each thread extending from a plurality of thread bobbins (not shown), and a thread passing through the thread tension holding unit 19. The actual air volume control is provided between the actual air waiting block 21 and the mounting force holding unit 19 and the actual air waiting block 19 waiting for the end of the air waiting for the air waiting for the actual air waiting block 21. The unit 27 and the yarn transfer nozzle 29 for conveying the yarn waiting to the yarn waiting block 21 are comprised.

The thread transfer nozzle 29 is coupled to an upper portion of the head stem 33 of the head assembly 31, and receives air from an air supply unit (not shown) of the plurality of air supply holes 23 of the actual atmospheric block 21. The chamber which is selectively connected to any one and is sprayed to the real engine line 25 which is in line with the first guide tube 39 of the guide tube assembly 37 to be described later, and is waiting in the real engine line 25. The distal end is conveyed through the guiding tube assembly 37 to the area adjacent to the needle work 35.                     

The head assembly 31 is coupled to the front of the fixed frame 11 and has a head stem 33 having a substantially rectangular frame shape, a needle work part 35 installed at a lower end of the head stem 33, and a large organ ( 25, the guide tube assembly 37 forming a single thread supply path so that the thread waiting on the needle work part 35 is transferred to the needle work part 35, and the needle 47 transferred to the area adjacent to the needle work part 35. And a thread take-up device 51 for tensioning and relaxing the thread by engaging a portion of the thread passing through the guide tube assembly 37.

The guide tube assembly 37 is spaced apart from the first guide tube 39 disposed on the top of the head stem 33 by a predetermined distance while forming the same axis as the first guide tube 39 under the head stem 33. The second guide pipe 41 is disposed, and the auxiliary pipe 43 for opening and closing the separation gap between the first guide pipe 39 and the second guide pipe 41 by lifting and lowering.

On the other hand, Figure 2 is a partially enlarged perspective view of the thread take-up device for an automatic machine according to the present invention, Figure 3 is a side view of Figure 2, Figure 4 is an exploded perspective view of the thread take-up device of FIG. As shown in these figures, the thread take-up device 51 according to the present invention is coupled to the rotating shaft 53 across both sides of the head stem 33, and the rotating shaft 53, and the rotating shaft The crank member 61 coupled to the thread take-up unit 55 which is reciprocated up and down with respect to the 53 and the rotation shaft 53 to transfer the rotation drive motion of the thread take-up drive unit (not shown) to the thread take-up unit 55. ), A spring 71 elastically connected between the thread take-up unit 55 and the crank member 61 and integrally rotate the thread take-up unit 55 and the crank member 61, and the thread take-up unit 55 ) Has an over-rotating means (81) for rotating a predetermined angle relative to the crank member (61) against the elastic force of the spring (71).                     

The rotating shaft 53 is supported by bearings (not shown) at both ends of the head stem 33. In addition, the rotary shaft 53 is integrally formed with a rod-shaped push rod 83 for pressing and releasing the one side protrusion 85 of the thread take-up unit 55 which will be described later. The rotation shaft 53 is provided with a pair of snap ring accommodation grooves 53a to which the snap ring 54 is coupled to prevent the thread take-up unit 55 from moving along the rotation axis. Snap ring 54 is coupled to the snap ring receiving groove (53a) is in close contact with the side of the spring 71 in close contact with the outer surface of the take-up unit (55).

The thread take-up unit 55 is provided with a pair of swing levers 57 provided in parallel with the guide tube assembly 37 therebetween, and is provided at the free end of each swing lever 57 to be spaced apart from the guide tube assembly 37. It has a thread hanger member 59 reciprocating through the gap and the thread is caught. Thread hanger member 59 reciprocates between a bottom dead center located in the upper region of the second guide tube 41 and a top dead center positioned in front of the first guide tube 39. In addition, the thread take-up unit 55 is provided with a protrusion 85 provided at an opposite position of the thread hanger member 59 to interconnect the swing levers 57 and protruding in parallel with the pivot shaft 53. The protrusion 85 is pressed and released by the push rod 83 of the pivot shaft 53.

The crank member 61 is provided with a drive lever coupling portion 63 to which the drive lever 67 for transmitting the rotational drive movement of the thread take-up drive unit (not shown) to the crank member 61 is coupled. The crank member 61 is driven to rotate by a predetermined angle so that the thread holder member 59 of the thread take-up unit 55 reciprocates between the top dead center and the bottom dead center by the drive lever 67. In addition, the crank member 61 is provided with a spring engaging portion 65 to which a region of the spring 71 is coupled at a position opposite to the driving lever coupling portion 63.

The spring 71 surrounds the outer circumferential surface of the rotation shaft 53 and connects a pair of coil portions 73 to closely contact the outer surface of the thread take-up unit 55, and one end of each coil portion 73 is interconnected, and a crank member ( The connecting portion 75 coupled to the spring coupling portion 65 of the 61 and the support portion 77 extending radially from the other end of the coil portion 73 to elastically support the protrusions 85 of the thread take-up unit 55. ) The coil part 73, the connection part 75, and the support part 77 are integrally formed, and the spring 71 has a symmetrical shape as a whole. As a result, the thread take-up unit 55 and the crank member 61 are elastically interconnected by the spring 71.

 The over-rotating means 81 is provided on the push rod 83 of the rotating shaft 53, the protrusion 85 of the thread take-up unit 55, and the outer surface of the head stem 33 to linearly reciprocate. It is composed of a link 93 which connects the actuator 87, the actuator 87 and the rotation shaft 53, and converts the linear reciprocating motion of the actuator 87 into a rotational movement to rotate the rotation shaft 53. .

The cylinder rod 89 and the link 93 of the actuator 87 are interconnected by the connecting member 91. The connecting member 91 and the link 93 are interconnected by the connecting pin 95.

With this arrangement, when the automatic embroidery machine according to the present invention is embroidered, the thread take-up unit 55 and the thread take-up unit 55 are elastically connected between the thread take-up unit 55 and the crank member 61. The crank member 61 is integrally rotated relative to the rotation shaft 53. At this time, the thread hanger member 59 of the thread take-up unit 55 is the bottom dead center and the first dead center located in the upper region of the second guide tube 41 by the operation of the crank member 61 and the drive lever 67. The reciprocating motion is performed between the top dead centers located in front of the guide tube 39. As a result, the thread hook member 59 of the thread take-up unit 55 does not move to the rear of the thread supply path during the embroidery work, so that the thread caught by the thread hook member 59 is always in contact with the thread hook member 59. The thread is prevented from tangling in the guide tube assembly 37 and the like, and the thread hanger member 59 moves from the bottom dead center to the top dead center to reduce the impact when the thread is caught by the thread hanger member 59, thereby shortening the thread. It is possible to prevent the thread take-up operation is made stable.

On the other hand, when the automatic embroidery machine according to the present invention to replace the thread, the thread take-up driving unit is stopped to stop the rotation of the crank member 61 and the thread take-up unit 55. Subsequently, the actuator 87 is driven so that the length of the cylinder rod 89 is reduced, and the link 93 is rotated to rotate the rotation shaft 53 by a predetermined angle in one direction. At this time, the crank member 61 is not rotated by the drive lever 67 connected to the thread take-up drive unit, the push rod 83 of the rotation shaft 53 is a thread take-up unit 55 as shown in FIG. Pressing the projection 85 of the). And, as shown in Figure 6, the push rod 83 of the rotation shaft 53 is further rotated in one direction so that the thread hanger member 59 of the thread take-up unit 55 is guide tube assembly 37 from the bottom dead center. The rear of the, that is, the rear of the actual supply path. At this time, the thread take-up unit 55 is rotated relative to the crank member 61 by a predetermined angle while countering the elastic force of the spring 71, the spring 71 is the thread take-up unit 55 in the opposite direction of the pressing The elastic force is applied to the protrusion 85 of the. Next, when the thread 5 waiting in the thread pipe passage 25 is transferred to the needle work part 35 through the guide tube assembly 37 and the thread 5 is bound to the needle hole, the thread replacement work is completed. To drive the actuator 87 to extend the length of the cylinder rod 89, the rotation shaft 53 connected to the link 93 is rotated in the other direction. At this time, while the push rod 83 of the rotation shaft 53 is rotated by a predetermined angle in the other direction, the protrusion 85 of the thread take-up unit 55 is released from the push rod 83, and the thread take-up unit ( 55 is returned to the original position, that is, the thread hook member 59 of the thread take-up unit 55 to the original bottom dead center position by the elastic force of the spring (71). The thread holder member 59 returns to the bottom dead center position and simultaneously drives the thread take-up driving unit to hold the thread 5 connected to the needle 47 by the thread holder member 59 of the thread take-up unit 55. The thread hanger member 59 of the unit 55 reciprocates between the bottom dead center and the top dead center. As a result, after the thread take-up driving unit is stopped, the thread hanger member 59 of the thread take-up unit 55 can be positioned behind the thread feed path by the interaction of the actuator 87 and the spring 71. It is possible to improve work efficiency by shortening the replacement work time.

In this way, the thread take-up unit and the crank member which rotate relative to the rotation shaft are elastically connected with the spring, and the thread take-up unit is rotated relative to the elastic force of the spring by the over-rotating means and rotated relative to the crank member by a predetermined angle. Stabilization of the squeeze operation prevents the short circuit of the thread and improves the work efficiency by shortening the replacement time of the seal.

On the other hand, in the above-described embodiment, the rotation shaft is limited to the rotation by the drive of the actuator, but not limited to this, it is a matter of course that the rotation shaft can be rotated by connecting a separate motor directly to the rotation shaft.

 As described above, according to the present invention, it provides a thread take-up device for an automatic embroidery machine that can stabilize the thread take-up operation to prevent the short circuit of the thread, improve the work efficiency by shortening the replacement time of the seal.

Claims (3)

In the thread take-up device for automatic embroidery machine for tensioning and relaxing the thread connected to the needle by the vertical reciprocating motion, A rotating shaft; A thread take-up unit coupled to the rotation shaft and configured to reciprocate up and down with respect to the rotation shaft by hanging a thread; A crank member coupled to the rotation shaft to transfer the rotation driving motion of the thread take-up driving unit to the thread take-up unit; A spring elastically connected between the thread take-up unit and the crank member to integrally rotate the thread take-up unit and the crank member; And an over-rotating means for rotating the thread take-up unit relative to the crank member by a predetermined angle against the elastic force of the spring. The method of claim 1, The over-rotating means, A push rod formed integrally with the pivot shaft; A protruding portion projecting from the thread take-up unit in parallel to the rotation shaft and being pressed and released by the push rod when the push rod is rotated; A linear reciprocating actuator; And a link connecting the actuator and the rotational shaft to each other and converting the linear reciprocating motion of the actuator into a rotational movement to rotate the rotational shaft. The method of claim 2, When the push rod presses the protrusion, the spring exerts an elastic force in the opposite direction to the pressing portion of the protrusion, and when the push rod releases the protrusion, the protrusion returns to its original position by the elastic force of the spring. Thread take-up device for an automatic embroidery machine, characterized in that.

Images