KR20060044733A - Eye-type buttonhole sewing machine - Google Patents

Abstract

The eyelet buttonhole sewing machine, to stitch an eyelet buttonhole seam (70), has a thread deflection unit at the thread tensioning and cutting zone, with a swing deflector (43) moving between rest and working positions. In the working position it moves the leading section of the looper thread, held in the thread clamp (53) at a trailing thread section (67), away from the counter blade (22) of the thread cutter.

Description

Eye Button Button Sewing Machine {EYE-TYPE BUTTONHOLE SEWING MACHINE}

1 is a longitudinal view of an eye-shaped buttonhole sewing machine showing an x-y table in position relative to a needle for placing a work member to be sewn;

FIG. 2 is an enlarged view of the opening of the x-y table according to the arrow II in FIG.

3 is an enlarged view of FIG. 2;

4 is a perspective view of a thread deflector.

FIG. 5 is an enlarged cross-sectional view taken along line III-III of FIG. 3, showing a state of rotation by 180 ° by the thread deflecting device in the seating position.

6 corresponds to FIG. 5 with a thread deflector in the operating position;

FIG. 7 shows the seal clamp along line VII-VII in FIG. 3 in detail; FIG.

8 is an enlarged view of a corresponding knife and yarn extracting device according to arrows VIII-VIII of FIG.

Fig. 9 is a detail of Fig. 3 with the thread extraction device in the starting end and the seating position of the looper yarn held in the thread clamp before the work member is placed and before the eye button button seam is sewn.

FIG. 10 is a view after a working member is provided in the eye buttonhole seam of FIG. 9; FIG.

FIG. 11 is a view showing a state in which the seal extraction device is pivoted toward the corresponding knife in FIGS. 9 and 10.

Fig. 12 is a view showing a working member having an eye button button hole, in which the start end and the tail member of the looper yarn are suspended in the eye button button seam.

[Explanation of symbols on the main parts of the drawings]

1: arm 2: base plate

3: prop 4: arm axis

5: needle 6: thread

7: hook bearing 10; table

13: clamp 14: bearing lever

24: seal extraction device 25: pivot bearing

29: piston rod 38: thread deflector

The present invention provides an eye button-hole sewing machine for forming an eye-button button hole seam having a start end and a tail member, which are free ends of a looper yarn, comprising: an arm; A needle which can be driven in the z direction by an arm axis supported by the arm and guides the needle thread; A base plate; An x-y table displaceable in the x and y directions in the base plate; A work piece clamp disposed on the x-y table; A hook bearing including a spout attachment portion disposed under the needle for supplying the looper yarn, the hook bearing being disposed on the base plate and rotatably driven; A corresponding knife of a yarn cutting device disposed on the x-y table; A seal clamp adjacent the corresponding knife and for the start end of the looper yarn; A thread extracting device which is movable past the seal clamp and grips the tail member of the looper yarn and supplies it to the corresponding knife; A child buttonhole sewing machine including a drive unit for a thread extraction device.

The Durkoff Adler Leaflet, entitled "Double-Curved Stitch Buttonholes with CNC Stepping Motors 579/589," discloses eye-type buttonhole sewing machines of a general type, according to which the looper yarn, and optionally the looper yarn, Gimp threads supplied and stitched up are cut with the long tail member. In a series of operations, these tail members of the looper yarn and the zipper yarn are securely tacked clockwise and then sewn. When the tail member is cut, the starting end of the looper yarn supported by the seal clamp is also cut at the same time. As a result, the member is cut and dropped into the collection box, thereby contaminating the apparatus. The fact that two threads are cut in every cutting operation, that is, the tail member and the starting end of the looper yarn severely wears the cutting device.

It is an object of the present invention to improve an eye-shaped buttonhole sewing machine in such a way that complicated operations of removing residual seal members can be avoided and wear of the cutting device is reduced.

According to the present invention, an object of this invention is to provide a thread deflection device which is pivotable from a stop position constituting a seating position to a stop position constituting an operating position, the deflection apparatus having a starting end of the looper yarn clamped to the seal clamp of the corresponding knife. It is achieved by an eye buttonhole sewing machine which deflects out of range. The starting end of the uncut looper yarn eliminates the cutting member to be removed. This also applies to gimp yarns. The wear of the cutting knife is reduced. The eye-shaped short-time sewing machine according to the present invention is used for seam-type buttonhole seam, but can also be used for other kinds of buttonholes or lace-up holes.

Other objects, features and advantages of the present invention will be more clearly understood by the following detailed description with reference to the accompanying drawings.

As shown in Fig. 1, the child buttonhole sewing machine takes the form of C; It comprises an upper arm 1, a bottom base plate 2 in the form of a housing, and a vertical strut 3 connecting the arm and the base plate. The arm shaft 4 is typically supported by the arm and can be driven by a drive motor (not shown). The drive of the vertical needle bar displaceable in the z direction and with the needle 5 is typically made from the arm axis 4. The needle thread 6 is supplied by the needle 5 from a needle thread supply part (not shown). At the bottom of the needle bar with the needle 5, the hook bearing 7 is arranged on the base plate 2 and has a hook (not shown) which can be rotatably driven around the vertical axis 8. Have The operation of the hook bearing 7 is carried out as described in the embodiment of German patent application 198 07 771 (corresponding to US Pat. No. 6,019,066). A spout attachment 9 for stitching the needle 5 is provided on the base plate 2 above the hook bearing 7.

The x-y table 10 is disposed on the base plate 2 and is a transverse sliding portion that is displaceable in two horizontal coordinate directions, that is, in the x direction and the y direction. The x-y table 10 has a design disclosed in German Patent Application No. 198 07 771 (corresponding to US Pat. No. 6.095.066). The operation of the x-y table 10 is made by an electric positioning motor, generally a stepper motor, an x driver and a y driver, but can also be adjusted by a direct current motor. This drive is not shown.

The two-member support plate is disposed on the x-y table 10 and is composed of two support plates 11 and 11 '. Each of these support plates 11 and 11 'can be easily detached and supported by the x-y table 10. Each said support plate 11, 11 ′ covers a hook bearing 7; When the looper yarn supplied from the looper yarn supply part (not shown) is caught, the support plate must be separated. The gimp yarns can be supplied as known, and are not shown here.

A work piece clamp 13 is provided having a pivoted double arm bearing lever 14. The free end of the bearing lever 14 comprises an upper clamping plate 15. The pivoting operation of the bearing lever 14 and the upper clamping plate 15 is made by a drive unit (not shown) disposed on the base plate 2, which corresponds to EP 1 354 993A (US Patent No. 6.47.905B2). ) Is disclosed. The bottom clamping plate 16 is assigned to the upper clamping plate 15 and fixed to the support plate 11. The space above the support plates 11, 11 ′ is covered by a cover 17 adjacent to it leaving the free end of the bottom clamping plate 16.

A buttonhole cutting device 18 is provided below the upper clamping plate 15, i.e., between the upper clamping plate and the support 3 in the y direction. The cutting device 18 is disposed on the base plate 2 and is non-movable in the z direction, and is disposed perpendicularly to the arm 1 above the knife 19 and in the z direction toward the knife 19. And anvil 20 which is movable to and returns back upward. This type of design is disclosed in DE 199 16 660C1 (corresponding to US Pat. No. 6.220.192), which is incorporated herein by reference.

The thread cutting device 21 is disposed on the x-y table 10 and has a stationary counterpart knife 22 replaceably fixed to the knife support 23; The knife support is fixed to the support plate 11 and is stationary relative to the x-y table 10. The thread extraction device 24 is disposed on the opposite side of the corresponding knife 22, and takes the form of a hook in the form of a double arm lever. One end thereof is pivotally mounted on the support plate 11 by a pivot bearing 25. The other free end of the thread extraction device comprises a thread extraction and cutting area 26, which area can be moved into a cutaway engagement with the stationary counterpart knife 22 as described below.

The seal extraction device 24 may be pivotally driven by a linear drive 27 in the form of a pneumatic piston-cylinder drive. The drive 27 includes a cylinder 28 stationary with respect to the x-y table 10, the piston rod 29 of which can be linearly moved in accordance with the pneumatic actuation of the cylinder 28. Pneumatic operation of the cylinder 28 is achieved by a solenoid valve (not shown), which can be triggered by the control system of the sewing machine, and is supplied with compressed air generated from a compressed air source (not shown).

Near the outer free end, the piston rod 29 is guided by the guide bearing 30. The drive block 31 is fixed to the piston rod 29 and includes a coulisse 32 extending across the direction of movement of the piston rod 29. The end of the drive lever 33 of the articulated lever link 34 is guided and supported by the guide roll 35 at the cooler 32. The link 34 is a driven lever 36 which is articulated to the end of the drive lever 33 rotated from the guide roll 35, and a driven member which is rotatably connected to the thread extraction device 24 in the pivot bearing 25. Lever 37. When the piston rod 29 extends from the cylinder 28 to the right in FIG. 3, the seal extraction device 24 moves counterclockwise from the seating position shown in FIG. 3 toward the stationary counterpart knife 22.

The thread deflecting device 38 is provided on the stationary counterpart knife 22 side, that is, on the rotational side toward the thread extracting device 24. The thread deflector 38 shown in FIG. 4 rests on a thread deflection support 39 which is stationary relative to the x-y table 10. The support 39 is provided with an upwardly open groove 40; This groove extends in the longitudinal direction and is freely pivotally received in the linear bearing portion 41 of the deflection device 38 of the spring steel wire. By means of screws 42, the bearing portion 41 can be fixed to prevent inadvertent removal or dropping of the support. The actual thread deflector 43 in the form of a lever extends at an angle from one end of the bearing portion 41 of the deflector 38. At the other end, the pivoted bend 44 extends at a set angle in the same direction, the free end 45 of which can only be seen in FIGS. 5 and 6 with a corresponding torsional preload of the deflector 38. Is captured by the support 39. The preload should be such that the thread deflector 43 and the pivot bent portion 44 connected to the unloaded state by the bearing portion 41 take the position shown by the solid line in FIG. 4, and the pivot bent portion 44 is When operated against torsional preload, it is pivoted upward to the seating position shown by the dashed line in FIG.

The pivoting operation of the yarn deflector 43 is also performed by the linear drive 27. To this end, an actuating lever 47 is mounted on the angular sheet metal support 46, which is stationary with respect to the xy table 10 and pivotable about the pivot 48, which lever 47. Is an angle lever that resists the pivot bend 44 of the thread deflector 38 by the upper horizontal actuating section 49. The downward return portion of the annular actuating lever 47 unilaterally withstands the pin-shaped return stop portion 51 mounted on the drive block 31. The pinned limit stop 52 is formed on the sheet metal support 46 and is disposed inwardly between the actuating part 49 and the returning part 50.

When the thread deflector 43 and the pivot bend 44 are in the upper seated position as shown in Fig. 5 and the thread extractor 24 is in the rear seated position shown in Figs. 31 is in a position adjacent to the cylinder 28, ie the piston rod 29 is retracted into the cylinder 28. In this position of the drive block 31, the return stop 51 mounted to resist the return 50 of the actuating lever 47 is pivoted in the counterclockwise direction in FIG. 5, corresponding to the torsional preload. It is pivoted up into one seating position. However, if the piston rod 29 extends from the cylinder 28 for the counterclockwise operation of the seal extractor 24, the return portion 51 is the actuating portion 49 of the actuating lever 47. Thus, by partial release of the preload, the pivot flexure 44 can be pivoted down sufficiently to allow the actuating portion 49 of the actuating lever 47 to rest on the limit stop 52. As a result, the pivoting motion of the pivot flexure 44 is limited downward. In this position, the thread deflector 43 is in the operating position.

Upstream of the thread deflector 38, in relation to the position of the thread extractor 24, acts for the starting end 54 of the looper yarn 12 between the thread deflector 43 and the pivot bend 44. Possible seal clamps 53 are provided. This clamp includes a rigid clamping joint 55 to which a flexible clamping member 56 is assigned and formed by leaf springs. Since the clamping joint and the clamping member are bonded and mounted on the support angle 57 fixed to the support plate 11, the clamping joint and the clamping member are stationary relative to the xy table 10, and the support angle is a knife support 23 and a thread deflection support ( 39) is fixed. An actuating pin 58 protruding through the opening 59 in the clamping joint 55 is mounted on the flexible clamping member 56 near the free end of the clamping joint 55 and is upright therefrom. Between the free end of the joint 55 and the clamping member 56 and the actuating pin 58, the clamping region 60 for the start end 54 of the looper yarn 12 is connected to the joint 55 and the clamping member ( 56). When the actuating pins 58 are released, the flexible clamping member 56 moves toward the clamping joint 55 to clamp the starting end 54 as shown in FIG. 7. Depending on the corresponding load acting on the actuating pin 58, the clamping member 56 is removed from the joint 55, so that the starting end 54 can be inserted or removed.

For operation of the seal clamp 53, an angular control lever 61 is mounted to the pivotable pivot extraction device 24 at a small angle. Due to the free end rotating towards the seal clamp 53, the control lever 61 comprises a control button 62 which can be associated with the actuating pin 58 as shown in FIG. 7. At the other end, the control lever 61 is a leg spring 63 which pivots the actuation lever 61 with the thread extractor 24 clockwise around the joint 64 in the position shown in solid line in FIG. 2. Is loaded by

As shown in Fig. 8, the thread extraction and cutting area 26 disposed at the pivotable free end of the thread extraction device 24 has a corresponding cutting edge 65 having a V-shaped cut shape and a lower portion thereof. Extraction edge 66. The cut edge 65 of the V-shaped cutout guides the tail member 67 of the looper yarn 12 and then guides it to the corresponding knife 22 to cut it; The extraction edge 66 performs only the action of extracting from the seal clamp 53 without cutting the start end 54 of the supported looper yarn 12.

The operation mode will be described in detail with reference to FIGS. 9 to 11.

As shown in FIG. 9, the starting end 54 of the looper yarn 12 is guided from the spout attachment 9 to the seal clamp 53 and then supported by clamping. The starting end is projected over the seal clamp 53 by the remaining member 68.

Now, the working member 69 is inserted into the working member clamp 13 according to a known method, clamped between the clamping plates 15 and 16, and the eye-shaped buttonhole seam 70 is sewn. The sewing of the eye-shaped buttonhole seam 70 displaces the xy table 10 with a clamped work member 69 by a limited amount in the y direction and in relation to the spout attachment portion 9 in the x direction. It performs well. Sewing of the eye-shaped buttonhole seam 70 is performed in a general manner. Of course, as with the needle thread 6, the looper thread 12 is combined to form a seam 70. Since this operation and the cutting operation of the needle thread 6 are performed in a known manner, there is nothing new to explain.

At the end of this sewing process, the start end 54 of the looper yarn 12 is in the same position as before the sewing work of the eye-shaped buttonhole seam 70 starts. In addition, the tail member 67 of the looper yarn 12 reaches the spout attachment portion 9 from the eye-shaped buttonhole seam 70. At the end of the eye buttonhole sewing operation, since the spout attachment portion 9 is in a position associated with the bottom clamping plate 16 of the work piece clamp 13 shown in Fig. 9, the xy table 10 is y Direction, the eye-shaped buttonhole seam 70 then reaches the buttonhole cutting device 18. At this time, the buttonhole cutout 71 is formed by the corresponding operation of the anvil 20 from the top to the bottom by the union with the knife 19. In the position of this x-y table 10, the spout attachment portion 9 shown in Figs. 10 and 11 is disposed between the thread extraction device 24 and the seal clamp 53. The yarn deflector 43 is disposed above the starting end 54 of the looper yarn 12.

Now, as the linear drive 27 is operated, the thread extraction device 24 by the thread extraction and cutting area 26 is directed toward the seal clamp 53 and the corresponding knife 22 in the counterclockwise direction of FIG. Is moved to. At the same time, the pivot bent portion 44, which is moved upward to the seating position as shown in FIG. 5 is released, and as it is moved downward to the operating position shown in FIG. 6, the thread deflector 43 is also pivoted downward, By pressing the start end 54 of the looper yarn 12 disposed thereunder and directing it downward, the extraction edge instead of the V-shaped cutting edge 65 when the seal extractor 24 continues to move forward. It is held by 66. The tail member 67 of the looper yarn 12 close to the thread extraction device 24 is already gripped by the V-shaped cutting edge 65 of the thread extraction and cutting region 26 and directed toward the corresponding knife 22. Included in the direction.

Before the thread extraction and cutting area 26 of the thread extraction device 24 reaches the corresponding knife 22, the control button 62 of the control lever 61 is operated with a working pin 58 of the flexible clamping member 56. ) To open the seal clamp 53. As the extraction device 24 moves in the direction toward the corresponding knife 22, the extraction edge 66 can extract the start end 54 of the looper yarn 12 from the seal clamp 53. On the other hand, the tail member 67 of the looper yarn 12 included in the V-shaped cutting edge 65 is inserted into the seal clamp 53. At the end of the pivoting operation of the yarn extractor 24 towards the corresponding knife 22, the start end 54 of the looper yarn 12 will be retracted from the seal clamp 53 and then fall downward. The tail member 67 of the looper yarn 12 is being cut on the corresponding knife. By means of a control button 62 designed to counteract this, the actuating pin 58 is released again in this position and the seal clamp 53 is closed. The leg spring 63 helps the control lever 61 return to its initial position. The tail member 67 of the looper yarn 12 is clamped to the seal clamp 53. Thereafter, the linear drive 27 is operated so that the piston rod 29 retracts into the cylinder 28. In this way, the seal extraction device 24 returns back to the position shown in FIG. The thread deflector 38 is pivoted upward to the position shown in FIG. 5, ie, the pivot bend 44 is pushed upward by the actuating portion 49 of the actuating lever 47, thus the thread deflector 43. Include upwards.

As the xy table 10 having the spout attachment portion 9 at the bottom of the bottom clamping plate 16 is reversed to the position shown in FIG. 9, it is seated on the thread deflector 43 at the end of the thread cutting process. The tail member 67 of the looper yarn 12 is drawn therefrom and moves from the lower part of the thread deflector 43 to the position shown in FIG. Then, after the end of the buttonhole sewing operation, the tail member 67 of the looper yarn 12 becomes the start end 54 of the looper yarn 12 for subsequent sewing work of the eye-shaped buttonhole seam 70.

As shown in FIG. 12, after the above-mentioned cutting operation is completed, the start end 54 of the looper yarn 12 and the tail member 67 of the looper yarn 12 are disposed on the work member 69. The starting end 54 is longer than the tail member 67 by the remaining member 68. According to the prior art, this member 68 has already been cut, contaminating the device. The start end 54 and the tail member 67 are pulled downward through the buttonhole cutout 71 and are manually cut after being stitched.

The present invention can provide an eye-button buttonhole sewing machine which can avoid the complicated work of removing the residual seal member and reduce the wear of the cutting device.

Claims (9)

In the eye-shaped buttonhole sewing machine which forms the eye-shaped buttonhole seam 70 having the start end 54 and the tail member 67, which are free ends of the looper yarn 12, With the arm (1), A needle 5 which can be driven in the z direction by an arm axis 4 supported by the arm 1 and guides the needle thread 6; Base plate (2), An x-y table 10 which is displaceable in the x direction and the y direction in the base plate 2, A work member clamp 13 disposed on the x-y table 10, A hook bearing (7) comprising a spout attachment portion (9) disposed under the needle (5) for supplying the looper yarn (12), which is disposed on the base plate (2) and can be driven rotatably; , A corresponding knife 22 of the thread cutting device 21 disposed on the x-y table 10, A seal clamp 53 adjacent the corresponding knife 22 and for the start end 54 of the looper yarn 12, A thread extraction device 24 which is movable past the seal clamp 53 and grips the tail member 67 of the looper yarn 12 and supplies it to the corresponding knife 22; A drive unit 27 for the seal extractor 24, A thread deflector 38 is pivotable from a stop position constituting a seating position to a stop position constituting an operating position, the biasing apparatus being provided at the starting end of the looper yarn 12 clamped to the seal clamp 53 ( 54. A child buttonhole sewing machine characterized by biasing out of the range of the corresponding knife (22). The eye button sewing machine according to claim 1, characterized in that the thread deflecting device (38) is driven by a drive unit (27) of the thread extracting device (24). 3. The yarn deflector (38) according to claim 2, wherein the yarn deflector (38) is a yarn deflector (43) movable into a deflection engagement with the start end (54) of the looper yarns (12), the yarn deflector being tightly bonded to the yarn deflector, Eye-button buttonhole sewing machine, characterized in that it comprises a pivot bend (44) operable by a drive (27) of the device (24). 4. The child-type buttonhole sewing machine according to claim 3, wherein the thread deflecting device (38) is pivotally supported by a bearing part (41) formed between the thread deflector (43) and the pivot bending part (44). . 2. The thread deflector 38 is formed integrally with a spring steel wire, one end 45 of which has a pivot bend 44 and a thread deflector 43 in the first of two stop positions. Eye buttonhole sewing machine characterized in that the clamping to pivot to the stop position. 4. The seal according to claim 3, wherein the pivot bend (44) is threaded such that the pivot bend (44) and the yarn deflector (43) are pivoted to the second of the two actuation positions in accordance with the operation of the drive (27). Eye button-hole sewing machine, characterized in that coupled with the operating lever 47 operable by the drive unit 27 of the extraction device (24). 2. The yarn extraction device (24) according to claim 1, wherein the yarn extraction device (24) comprises yarn extraction and cutting zones (26); This area includes a cutting edge 65 which grips the tail member 67 of the looper yarn 12 and feeds it to the corresponding knife 22 and the starting end 54 of the looper yarn 12 from the seal clamp 53. Eye-type buttonhole sewing machine, characterized in that it comprises an extraction edge 66 for extracting. 2. The child-type buttonhole sewing machine according to claim 1, wherein the thread extraction device (24) is designed such that the tail member (67) of the looper yarn (12) is arranged in the thread clamp (53) during extraction. 9. The seal extraction device (24) according to claim 8, wherein the seal extraction device (24) includes a control lever (61) for opening the seal clamp (53) when the tail member (67) of the looper yarn (12) is disposed on the seal clamp (53). Child buttonhole sewing machine characterized in that.

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