KR20140145546A - Embroidering machine - Google Patents

Abstract

An embroidering machine according to the present invention is composed to conduct both of the movement of changing the lowest position of a cloth pressing plate and the movement of hanging an upper thread after cutting and receiving the upper thread in a thread receiving unit using a single actuator. In the embroidering machine, an adjustment plate (34) regulates a vertical position within a distance of a by rotating, within 180°, an eccentric pin (36) on the fore-end surface of a flange (33) rotated by an actuator (23). The bearing (51a) of a cloth press driving link (48), which is inserted into an L-shaped groove on the adjustment plate (34), is combined with a horizontal groove (43c) during embroidery to regulate the lowest position of a cloth pressing plate (19) within a distance of a. When the embroidering machine converts into a thread with a different color, a needle bar driving part (45) stops a needle bar (18) and moves to the highest position, and the bearing (51a) of the cloth press driving link (48) moves from a horizontal groove (43c) to a vertical groove (43a) to be raised to the highest position (57) together with a cloth press driving part (46), i.e., the cloth pressing plate (19). The actuator (23) is operated and a hook (28a) comes below the cloth pressing plate (19), which has risen by a distance of b from an embroidery surface, to hang the cut upper thread.

Description

Embroidery machine {EMBROIDERING MACHINE}

The present invention relates to an operation for changing a lower limit position of a cloth presser plate and an operation for engaging an upper thread after cutting and storing it in a thread storage mechanism.

BACKGROUND ART Conventionally, an embroidery machine having a stapler or a stapler is known. In the embroidery machine, the arm portion and the head portion are integrally formed, or a star chain is detachably incorporated.

Either way, the operation of the needle bar, the cloth presser plate, the thread take-up, etc. of the head portion is regulated by the up-and-down driving force generated in the drive system of the arm portion.

However, the fine adjustment operation for changing the lower limit position (bottom dead center position) of the cloth presser plate in accordance with the thickness of the workpiece cloth to be embroidered is not limited to the above- For example, by using an actuator as disclosed in Japanese Patent Application Laid-Open No. 2008-006088 or Japanese Patent Application Laid-Open No. 2000-042271.

Japanese Patent Laid-Open Publication No. 2008-006088 discloses a sewing machine comprising a plurality of sewing machine heads of a multi-type embroidery machine in which an adjusting mechanism for adjusting the height of a bottom dead center position of a cloth pressing foot (cloth pressing plate) is provided, And the connection shaft is driven by the actuator.

Japanese Patent Application Laid-Open No. 2000-042271 discloses a lifting mechanism for changing the rotational motion of the main shaft to the lifting movement of the cloth pressing rod in order to adjust the height of the bottom dead center position of the cloth lifting / An adjusting mechanism for adjusting the height of the bottom dead center position of the cloth was provided, and the adjusting mechanism is adjusted and driven by the stepping motor.

By the way, the embroidery machine is different from embroidery in monochrome thread such as embroidery which puts name in work clothes, and in general, multi-colored thread is used according to the shape of embroidery. Therefore, the sewing machine head is equipped with a number of needle bars corresponding to the number of colors of the yarn used for embroidery.

Conventionally, when switching the color room, the preceding upper thread is cut off leaving a few centimeters from the needle eye, and in this state, the sewing machine arm selects the needle bar of the next color room to continue the embroidery.

Therefore, in the course of embroidery progress, when the preceding upper thread that has been cut off is pulled out of the needle eye and the embroidery is to be continued again in the color thread, stitch sewing occurs and the embroidery becomes a defective product .

In order to solve this problem, it is necessary to press or hold the cut end of the upper thread at an appropriate position until the next time of use so as not to escape from the needle eye, but an actuator for operating the pressing or storing device It becomes necessary separately.

In the case where the actuator is provided for adjusting the lower limit position (bottom dead center position) of the cloth presser plate and for pressing the cut upper thread, not only the problem that the apparatus on the sewing machine arm side is enlarged, but also the electric actuator is expensive, There arises a problem of causing a rise.

An object of the present invention is to provide an embroidery machine for performing both of an operation of changing the lower limit position of the cloth presser plate and an operation of hooking up the upper thread after cutting and storing it in the chamber accommodating mechanism using one actuator .

In order to solve the above problems, an embroidery machine according to the present invention is an embroidery machine in which a height of a lower limit position of a cloth presser plate is changed in accordance with a thickness of a work cloth to be embroidery object, the embroidery machine comprising: an electric actuator; An eccentric pin provided on a distal end surface of the rotary shaft; a throttle plate coupled to the eccentric pin and moving up and down in a predetermined range in accordance with rotation of the eccentric pin; And an L-shaped groove in which a groove, a round corner groove, and a horizontal groove are continuously formed, and a link roller that links the needle bar driving portion as a supporting point to the cloth pressing driver, and is inserted into the L- And a portion of the horizontal groove is reciprocated to follow the upper and lower positions of the adjustment plate, and when the embroidery sewing ratio is not being executed, And a driving mechanism including a cloth pressing plate driving roller that follows the upper and lower positions of the link rollers, and controls the electric actuator in accordance with the thickness of the work cloth to be embroidery, And the lower limit lower limit position of the cloth presser plate transferred from the roller is adjusted to a height corresponding to the thickness of the processing cloth as the embroidery object.

In this embroidery machine, for example, there is further provided a hook mechanism which is moved forward and backward by the power transmitted from the electric actuator via the transmission mechanism, wherein the cloth presser plate is configured such that when the cloth presser plate drive roller Is located at a position higher than the upper limit position necessary for embroidery sewing together with the needles at the needle tip, regardless of the rotation of the eccentric pin and the up-and-down movement of the adjustment plate when in the vertical groove of the L-shaped groove, The hook of the mechanism is configured so that the upper thread extending downward from the needle after cutting the upper thread of the needle is housed in the hanging mechanism. Further, in this embroidery machine, for example, the electric actuator is a pulse motor or a servo motor.

As described above, according to the present invention, since the upper thread after cutting is hooked and housed in the thread storage mechanism, when the upper thread that has been cut previously is pulled out of the needle thread and the embroidery is to be continued again in the thread color, stitch sewing occurs, It is possible to solve the problem that the problem is solved.

Further, the present invention is characterized in that both the operation of changing the lower limit position of the cloth presser plate and the operation of hooking the upper thread after cutting and storing it in the seal storing mechanism are performed by using one actuator, It is not necessary to provide an actuator and it is economical.

1 is a perspective view showing the appearance of an embroidery machine according to a first embodiment of the present invention;
2 is a perspective view showing a part of a sewing machine arm of the embroidery machine according to the first embodiment and an appearance of a sewing machine head coupled with the sewing machine arm.
Fig. 3 (a) is a view showing only a main portion of the sewing machine arm and the sewing machine head of the embroidery machine according to the first embodiment, Fig. 3 (b) .
FIGS. 4 (a) to 4 (c) are views showing the engagement relationship between the cloth presser height adjustment plate of the sewing machine arm and the bearings of the eccentric pin and cloth press drive link, and FIGS. 4 (d) (f) show the operation of the cloth presser plate linked to the operation of the cloth presser height adjusting plate, and (g) to (i) of FIG. 4 are views showing the operation of the cloth presser plate and the operation of the hook.
FIG. 5A is a view showing the state of a needle and an upper thread that have completed one embroidery step, FIG. 5B is a view showing a state of cutting the upper thread, and FIG. Fig. 5 (d) is a view showing a state in which the upper thread end portion hooked is housed in a storage portion; Fig.

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, embodiments of the present invention will be described with reference to the drawings.

First Embodiment

1 is a perspective view showing an appearance of an embroidery machine according to a first embodiment of the present invention. As shown in Fig. 1, the embroidery machine 1 includes a sewing machine table 2 and an embroidery frame 3 which is greatly enlarged at the center of the sewing machine table 2. As shown in Fig.

A plurality of (four in FIG. 1) downward shuttle portions 4 are provided inside the embroidery frame 3. The embroidery frame 3 freely moves forward, backward and leftward and rightward according to the program of embroidery instruction after the embroidery medium is unfolded.

A plurality of (four in the example shown in FIG. 1) sewing machine heads 5 are provided at the upper position corresponding to the lower shuttle portion 4 so that the head rails to be described later are held in the rail guide holding portions of the sewing machine arm 6. [ Respectively.

On the sewing machine table 2 of the embroidery machine 1 are provided standing portions 7a and 7b provided at both left and right ends of the sewing machine table 2 and a bridge portion 8 connecting the two standing portions 7, As shown in Fig.

The four sewing machine arms 6 are fixed to the bridge portion 8 of the door frame by a fixing portion provided on the rear surface, though not particularly shown. One main spindle 9 is inserted through these four sewing machine arms 6.

The main shaft 9 is supported at one end (the right end in Fig. 1) on one of the standing portions 7 (7b) on the right side in Fig. 1) of the door frame. One end of the spindle 9 which is shaft-supported is hidden by the inside of the standing portion 7b in Fig. 1, but a pulley is fixedly installed, and a belt is interposed between the pulley of a motor (not shown). The main shaft 9 is rotationally driven by this motor.

A color change section 11 for selecting a plurality of sewing bars of the sewing machine head 5 is arranged on the same surface as the surface on which the sewing machine arm 6 of the bridge section 8 of the door frame is fixed. The color change section 11 selects the needle bar to be selected by the axial movement of the color change shaft 12 through which the four sewing machine heads are inserted.

An upper thread base 13 having a length in the longitudinal direction corresponding to the arrangement width of the four arranged sewing machine heads 5 is disposed on the upper surface of the bridge portion 8 of the door frame. The upper thread base 13 is composed of a tabular tubular member 14 and a rod-like thread passing portion 15.

2 is a perspective view showing a part of the sewing machine arm 6 of the embroidery machine 1 of Fig. 1 and the appearance of the sewing machine head 5 coupled with the sewing machine arm 6. Fig. This sewing machine head 5 is provided with nine needle bar portions. That is, the embroidery machine 1 can perform the embroidery of nine yarns of color.

The needle bar portion has a thread base portion 16, an elongate portion 17, a needle bar 18, and a cloth presser plate 19. [ A needle (21) is attached to the tip of the needle bar (18). 1, an upper thread of each color used for embroidery wound around a tube such as a paper tube is loaded, though not particularly shown.

The thread pulled out from the tube is further pulled out after passing through the thread passing portion 14, passed through the thread take-up hole of the thread base portion 16 of the sewing machine head 5 shown in Fig. 2, and further pulled along the needle bar portion And is finally drawn into the needle hole of the needle 21 at the tip of the needle bar 18.

This sewing machine head 5 is slidably held by a head rail 22 on the rear side in a rail guide holding portion which is not visible behind the sewing machine arm 6 in the figure.

The sewing machine arm 6 rotates the main shaft cam and the thread take-up cam fixed to the main shaft 9 of Fig. 1 by an arm mechanism interlocked with each cam follower and the cam follower, And the upper and lower driving forces are transmitted to the needle bar 18 and the thread take-up device 16 to move the needle bar 18 and the thread take-up device 16 up and down.

The cloth presser plate 19 is vertically moved in linking with the upward and downward movement of the needle bar 18 while being inserted into the needle bar 18 of the needle bar from outside, The lower limit position of the vertical movement is controlled by the adjustment mechanism.

3 (a) is a view showing only the main parts of the sewing machine arm 6 and the sewing machine head 5 shown in Fig. 2 of the embroidery machine 1 shown in Fig. 1, and Fig. 3 (b) And the needle bar driving portion of the arm 6 is rotated 90 degrees to the left.

Figs. 4 (a) to 4 (c) are views showing the engagement relationship between the cloth pressing height adjusting plate of the sewing machine arm 6 and the bearings of the eccentric pin and cloth pressing drive link, and Figs. 4 (d) (g) to (i) of Fig. 4 show the relationship between the operation of the cloth presser plate 19 and the operation of the hook Fig.

3 (a) is a configuration of a main part for performing both the operation of changing the lower limit position of the cloth presser plate of the sewing machine arm 6 and the operation of hooking the upper thread after cutting by one actuator, And the needle bar driving portion 25 and shows the needle bar portion 26 as a main component of the sewing machine head 5. [

3 (a), the driving source system 24 includes an electric actuator 23 including a stepping motor shown in Fig. 2, a cog belt 27, a hook holding portion 28, a hook 29 A supporting point support plate 31, an eccentric pin shaft 32, an eccentric pin flange 33, and a throttle plate 34.

The pinch belt 27 is reciprocally rotationally driven across the pinch pulley of the rotating shaft of the electric actuator 23 and the pinch pulley 35 of the eccentric pin shaft 32, which are not seen behind in the figure.

The hook holding portion 28 is fixed to the hooking belt 27 by the belt fitting portion 26a and accompanies the reciprocating rotation of the hooking belt 27 to advance and retreat the hook 29. [

The supporting point support plate 31 is fixed to a casing (not shown) of the sewing machine arm 6 on the back side of the inverted U-shape, and rotatably holds the eccentric pin shaft 32 by both arms of the inverted C shape. An eccentric pin 36 protrudes from the end face of the eccentric pin flange 33 of the eccentric pin shaft 32 as shown in Figs. 4 (a), 4 (b) and 4 (c).

The eccentric pin (36) is fitted in a long groove (37) formed laterally in the lower part of the throttle plate (34). When the eccentric pin shaft 32, that is, the eccentric pin flange 33 is rotated, the eccentric pin 36 eccentrically rotates.

The eccentric rotation of the eccentric pin 36 causes the adjustment plate 34 to move in the horizontal direction by the guide groove 38 shown in FIG. 3A and the guide pin 39 fitted in the guide groove 38. [ As shown in Figs. 4 (a) and 4 (b), the distance a between the lowermost position 41 and the uppermost position 42 is moved up and down in accordance with a predetermined control. The distance a is, for example, 5 to 7 mm.

The adjustment plate 34 is a member for adjusting the cloth press height of the cloth presser plate. In the embroidery execution, as shown in Figs. 4 (d) and 4 (e) And also moves up and down based on control corresponding to the thickness of the embroidery medium.

As shown in Fig. 3 (a) and Figs. 4 (a), 4 (b) and 4 (c), on this surface, a vertical groove 43a, a round corner groove 43b, And an L-shaped groove 43 in which a horizontal groove 43c is formed continuously.

3 (a) and 3 (b), the armature shaft driving portion 25 includes an arm shaft 44 and a needle bar driving portion 45 fitted to the outside of the arm shaft 44, And a cloth presser driving unit 46. [ The needle bar driving part 45 has an engaging hole 45a which is engaged with the engaging projection of the needle bar driven part on the front face and the upper end of the needle bar driving part driving arm 47 is engaged with the back face.

The needle bar drive section drive arm 47 is connected to a cam follower which is in sliding contact with the peripheral surface of a main shaft cam (not shown) connected to and fixed to the main shaft 9 shown in Fig. 1, And is axially supported by a casing of the sewing machine arm 6 by an arm shaft.

The needle bar drive portion drive arm 47 enlarges the upward and downward movement transmitted from the cam follower to the fulcrum shaft 47a and transfers the upward and downward movement from the tip portion to the needle bar drive portion 45. [ The upper end of the cloth pressing drive link 48 is connected to the needle bar driving portion 45 by a bolt 49.

A pair of bearings 51 (51a, 51b) are mounted on the lower end of the cloth pressing drive link 48 coaxially. The bearing 51b is fitted in the horizontal groove 46a on one side of the cloth pressing driver 46. On the front surface of the cloth pressing driver 46, a coupling protrusion 46b is formed which is engaged with the cloth pressing portion of the needle bar.

The other bearing 51a of the pair of bearings 51 is engaged with the L-shaped groove 43 of the throttle plate 34 as shown in Figs. 4 (a), 4 (b) and 4 It is. 3 (a), in order to show the shape of the L-shaped groove 43 of the throttle plate 34 and the engagement relationship between the throttle plate 34 and the eccentric pin shaft 32, And the bearing 51a of the pushing drive link 48 is shown separately.

On the other hand, the needle bar 26 of the sewing machine head 5 is constituted by the needle bar 18, the needle bar driven portion 52, the cloth pressing portion 53 and the cloth pressing plate holding portion 54.

The needle bar driven portion (52) is fixed to the needle bar (18). The needle bar driven portion 52 has a coupling protrusion 52a. The engaging projection portion 52a is engaged with the engaging port 45a of the needle bar driving portion 45 of the engaging portion driving portion 25 of the sewing machine arm 6. [

The cloth presser driven portion 53 is slidably engaged with the needle bar 18 below the needle bar driven portion 52. The cloth presser driven portion (53) has a fitting hole (53a) at an upper end portion of a surface of the cloth pressing arm (53) opposed to the sewing machine arm (6). The engaging hole 53a is engaged with the engaging projection 46b of the cloth pressing driver 46 of the needle bar driving portion 25 of the sewing machine arm 6. [

Further, the cloth presser driven portion 53 has an engagement portion with the rotation prohibiting shaft 55 on the side opposite to the engagement portion 53a at the upper end. The rotation inhibiting shaft 55 has an upper end portion fixed to the needle bar driven portion 52 and a lower end portion slidably engaged with the engagement portion with the cloth pressing portion 53, (18) is prohibited.

The cloth presser plate holding portion 54 is fixedly connected to the cloth presser driven portion 53 through a short shaft 56 and holds the cloth presser plate 19 at the lower end portion thereof to move the cloth presser driven portion 53 up and down As shown in Fig.

The needle bar driving portion 45 of the needle bar driving portion 25 shown in Figs. 3A and 3B moves to the uppermost position when stopping the needle bar 18 to switch to another color chamber. Thereby, the cloth pressing drive link 48 is pulled up to the uppermost position together with the cloth pressing driver 46.

At this time, as described above, the throttle plate 34 can not move up and down only by the rotational eccentric difference (the distance a between the lowermost position 41 and the uppermost position 42) of the eccentric pin 36, The bearing 51a at the lower end portion of the bearing 48 is pulled up to the bearing uppermost position 57 spaced by a distance b larger than the distance a from the lowermost position 41 as shown in Fig.

Thus, as described above, since the throttle 34 can not move up and down only by the distance a between the lowermost position 41 and the uppermost position 42 shown in Figs. 4A and 4B, the bearing 51a Can not remain in the portion of the horizontal groove 43c of the L-shaped groove 43 of the throttling plate 34 at the time of embroidery execution and are arranged along the rounded corner groove 43b as shown in FIG. 4 (c) And moves to the portion of the vertical groove 43a.

4 (d) and 4 (c) through the bearing 51a, the bearing 51b, the horizontal grooves 46a, the cloth pressing driver 476 and the cloth pressing driver 53, to the embroidery-non-execution position 61 at a distance b which is largely spaced apart from the movement position within the distance a between the lowermost position 58 and the highest position 59 shown in Fig.

Even if the eccentric pin shaft 32 rotates, that is, when the eccentric pin 36 mounted on the eccentric pin flange 33 is rotated The bearing 51a is fitted in the vertical groove 43a of the L-shaped groove 43 so that the cloth pressing portion 52, that is, the cloth pressing plate 52, (19) does not move from the uppermost position (61) shown in Fig. 4 (f).

At this timing, the actuator 23 is driven, and the hooking belt 27 reciprocally rotates so that the hook holding portion 28, that is, the hook 28a is driven forward and backward. 4 (f) and (i), the hook 28a is operated to infiltrate into the gap of the downward distance b of the needle insertion through hole 58 of the cloth presser plate 19, And an end portion extending downward from the needle hole of the needle 21 of the upper thread is hooked.

5 (a) is a view showing the state of the needle 21 and the upper thread 62 which have completed the embroidery step of one color. Fig. 5 (b) shows the state in which the upper thread 62 is connected to the lower shuttle 4, 5 (c) is a view showing a state in which the hook 28a is engaged with the upper thread 62 after cutting, and Fig. 5 (c) d is a diagram showing a state in which the upper end portion 62a hooked up is housed in the seal end housing portion 64. [ As described above, the hook 28a holds the threaded upper end portion which is engaged in the threaded end receiving portion.

During the embroidery execution of the needle bar 26 shown in FIG. 3A, the needle bar driver 45 of the needle bar driver 25 shown in FIGS. 3A and 3B is moved downward to move up and down . The bearing 51a is engaged with the horizontal groove 43c of the L-shaped groove 43 and slides in the horizontal direction as shown in Figs. 4 (a) and 4 (b). Thus, the cloth presser plate 19 restricts the lower limit position at a position corresponding to the vertical position of the throttle plate 34, thereby suppressing the embroidery medium.

When the actuator 23 is driven by the control mechanism corresponding to the thickness of the embroidery medium, the rotational distance of the eccentric pin shaft 32, that is, the eccentric pin axis 32, Up and down movement depending on the amount of eccentric rotation of the pin 36 is transmitted to the throttle plate 34. [

The upward and downward movement of the throttle plate 34 is controlled by the horizontal grooves 43c of the L-shaped groove 43, the bearings 51a and 51b of the cloth pressing drive link 48, the horizontal grooves 46a of the cloth pressing driver 46, Is transmitted to the cloth presser plate (19) through the cloth presser driving part (46), the engaging projection part (46b), the engagement part (53a) and the cloth presser driven part (53). Thereby, the lower limit position of the cloth presser plate 19 can be changed at an arbitrary timing.

As described above, according to the first embodiment of the present invention, there is provided an embroidery machine for performing an operation of changing the lower limit position of the cloth presser plate and an operation of hooking up the upper thread after cutting and storing it in the thread storage mechanism by using one actuator .

As described above, the present invention can be used for an embroidery machine for changing the lower limit of the cloth presser plate and an operation for engaging the upper thread after cutting and storing it in the thread storage mechanism.

1: embroidery machine
2: Sewing machine table
3: Embroidery frame
4: Lower shuttle portion
5: Sewing machine head
6: sewing machine arm
7 (7a, 7b):
8: Bridge section
9:
11: Color change section
12: Color change axis
13: upper thread
14: tube rack
15:
16: Donations of real accounts
17: The tongue
18: Bongbong
19: Cloth plate
21: Needle
22: head rail
23: Actuator
24:
25:
26:
27: Strapped belt
28: hook holding portion
28a: Belt fitting portion
29: Hook
31: Support point supporting plate
32: Eccentric pin shaft
33: Eccentric pin flange
34: Throttle
35: With this pulley
36: Eccentric pin
37: Long groove
38: Guide groove
39: guide pin
41: lowest position
42: Top position
43: L-shaped groove
43a: Vertical groove
43b: round corner groove
43c: horizontal groove
44: arm shaft
45:
45a:
46: cloth pressing driver
46a: Horizontal groove
46b:
47: Needle-
47a:
48: cloth pressing drive link
49:
51 (51a, 51b): bearing
52:
52a:
53: Pressed cloth
53a:
54: a cloth presser plate holding part
55:
56: Shaft
57: Bearing top position
58: lowest position
59: Best location
61: embroidery run position
62: upper thread
63: movable blade
64:

Claims (3)

In which the height of the lower limit position of the cloth presser plate is changed in accordance with the thickness of the work cloth to be embroidered,
An electric actuator,
A rotating shaft for transmitting and rotating the power of the electric actuator by the transmitting mechanism,
An eccentric pin provided on a distal end surface of the rotary shaft,
A control plate coupled to the eccentric pin and moving up and down in a predetermined range in accordance with rotation of the eccentric pin;
An L-shaped groove in which a vertical groove, a rounded corner groove, and a horizontal groove are continuously formed on one surface of the above-
And is inserted into the L-shaped groove. When the embroidery sewing is being performed, the portion of the horizontal groove is reciprocated so as to follow the up-and-down position of the throttle plate, And a cloth presser plate driving roller that follows the vertical position of the link roller in the portion of the vertical groove when the sewing ratio is executed,
And a control device for controlling the electric actuator in accordance with the thickness of the processing cloth to be embroidered so that the lower limit position of the up and down movement of the cloth presser plate transmitted from the link roller of the needle- Is adjusted to a height corresponding to the thickness of the embroidery frame. The electric device according to claim 1, further comprising a hook mechanism that moves back and forth by the power transmitted from the electric actuator through the transmission mechanism,
Wherein the cloth presser plate is configured such that when the cloth presser plate driving roller is in the portion of the vertical groove of the L-shaped groove at the time of execution of the embroidery sewing ratio, regardless of the rotation of the eccentric pin and the up- Is located above the upper limit position necessary for sewing the embroidery with the needle of the sewing machine,
Wherein the hook of the hook mechanism hooks the upper thread extending downward from the needle after cutting the upper thread of the needle and stores it in the thread storage mechanism. The embroidery machine according to claim 1 or 2, wherein the electric actuator is a pulse motor or a servo motor.

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