TWI512160B - Universal presser device for sewing machine - Google Patents

Description

Universal press for sewing machine

The invention relates to a sewing machine pressing tool, in particular to a universal pressing tool for flat sewing and pleated sewing.

The presser of the conventional sewing machine is mainly installed above the needle plate and cooperates with the feeding teeth and the needle to sew the cloth; it can only be used for single type sewing, and is converted into other types. When sewing, the presser must be detached from the sewing machine and then replaced with various special types of presses for sewing; thus there is not only the need to prepare various types of presses, but also in the process of dressing. It will also cause standby and consume a lot of time and increase manufacturing costs.

Therefore, in view of the above problems, the industry has also developed a press-type or push-in type presser that transmits a part of the components of the presser through the transmission mechanism, and then moves it into the sewing type that needs to be converted into another type. The vicinity of the presser cooperates with the presser to perform the sewing work, but the structure of the transmission mechanism is quite complicated and cumbersome, and it is not only expensive but also inconvenient to use, and is to be improved.

An object of the present invention is to provide a universal press for a sewing machine which can simultaneously meet the needs of two different types of flat sewing and pleated sewing.

In order to achieve the above object, the present invention provides a universal press for a sewing machine, which comprises a presser foot arm, a presser foot plate and a front presser leg, the presser foot plate being connected to one end of the presser foot arm, the presser foot plate having a rear presser foot section and extending forward along the rear presser foot section a front plate; the front presser leg is connected to the front plate and located at a front side of the rear presser leg, and a fabric introduction groove is formed between the front presser leg and the front plate.

The invention also has the following effects, which not only greatly simplifies the overall assembly structure, but also saves material cost and production cost of the object, and can shorten the time taken for changing different sewing patterns. With the setting of the cloth thickness adjustment mechanism, the corresponding adjustment and transformation can be carried out according to the use requirements of various thicknesses. By means of the setting of the elevation adjusting mechanism, the cloth is easily fed from the leading edge of the front presser foot to the press between the presser and the feeder.

<present invention>

1, 1'‧‧‧ general-purpose press

10‧‧‧Foot arm

11‧‧‧ Subject

12‧‧‧ sockets

13‧‧‧ claw hook

14‧‧‧Pre-protective film

15‧‧‧ Side protection film

20‧‧‧Foot plate

21‧‧‧After the presser foot

22‧‧‧ front board

23‧‧‧Open slot

24‧‧‧ screw holes

30‧‧‧Front presser foot

31‧‧‧Upper board

311‧‧‧Long slot

312‧‧‧ screw hole

32‧‧‧ Lower board

33‧‧‧ side panels

34‧‧‧ Screw components

A‧‧‧ fabric introduction slot

40‧‧‧ cloth thickness adjustment mechanism

50‧‧‧ elevation adjustment mechanism

51‧‧‧ screw

52‧‧‧ nuts

81‧‧‧Brazing arm

82‧‧‧ needle stick

83‧‧‧ stitches

84‧‧‧ forward teeth

85‧‧‧post teeth

9‧‧‧ cloth

91‧‧‧上布

92‧‧‧下布

The first figure is a perspective view of the universal press of the present invention.

The second figure is a perspective view of another perspective view of the universal press of the present invention.

The third figure is an exploded perspective view of the universal press of the present invention.

The fourth drawing is a sectional view of the combination of the universal press of the present invention.

The fifth figure is a use state diagram of the general-purpose press tool of the present invention applied to the overlock sewing machine for flat sewing.

Fig. 6 is a view showing a state of use of the rivet type sewing machine in the overlock sewing machine of the present invention.

Figure 7 is a perspective view of another embodiment of the universal press of the present invention.

The detailed description and technical contents of the present invention will be described below with reference to the drawings. The drawings are only for the purpose of illustration and description, and are not intended to limit the invention.

Referring to the first to fourth figures, the present invention provides a universal press for a sewing machine. The press 1 mainly includes a presser arm 10, a presser foot 20 and a front presser leg 30.

The presser foot arm 10 can be made of a metal material by forging or dewaxing, and has a trunk-like body 11 having a set of receiving holes 12 at an upper portion of the main body 11 and a claw hook at a lower portion of the main body 11. 13. A front protective sheet 14 and a side protective sheet 15 are connected to the intermediate portion of the main body 11.

The presser foot 20 can also be made of a metal material by forging or dewaxing, and is generally a long rectangular plate having a rear presser leg 21 at the rear of the presser foot 20 and a rear presser leg 21 A front plate 22 is formed along the front side of the front side, and the front plate 22 and the rear presser leg portion 21 are formed with a height difference. An open groove 23 is provided in the middle of the rear presser leg portion 21, and the open groove 23 is a needle for the sewing machine. The sewing machine enters and exits (as shown in the fifth figure); and the plurality of screw holes 24 are opened in the front plate 22. The presser foot 20 is connected to the claw hook 13 of the presser foot arm 10 through a pressure plate and a screw so that the presser foot 20 can swing by the claw hook 13 as a center of rotation.

The front presser foot 30 is also made of a metal material by forging or dewaxing, and is composed of an upper plate 31, a lower plate 32 parallel to the upper plate 31 and located below the upper plate 31, and a connecting upper plate 31 and A U-shaped plate body formed by the one side plate 33 of the lower plate 32 is provided with two long slots 311 and a screw hole 312 on the upper plate 31, and the upper plate 31 is overlapped above the front plate 22, And the screwing member 34 is fixed by the long groove 311 and screwed to the screw hole 24 of the front plate 22, and the lower plate 32 is located on the front side of the rear presser leg 21, and is on the top surface of the lower plate 32 and the front plate 22. A cloth introduction groove A is formed between the bottom surfaces.

Further, the press tool of the present invention further includes a cloth thickness adjusting mechanism 40, which is opened by using The length of each long groove 311 of the upper plate 31 is greater than the outer diameter of the screwing member 34, so that the front presser foot portion 30 can be adjusted forward and backward on the front plate 22, so that the trailing edge of the front presser foot portion 30 can be changed to the rear. The distance between the leading edges of the presser foot segments 21 for fabrics of different thicknesses to enter the sewing operation.

In addition, the presser of the present invention further includes an elevation adjustment mechanism 50 that utilizes a screw 51, a nut 52, and a screw hole 312 of the upper plate 31. The screw 51 sequentially passes through the nut 52 and the screw hole 312. The lower plate 32 is horizontal in the normal state (as shown in the fourth figure). When it is necessary to adjust the lower plate 32 to be inclined, the screw elements 34 are first slightly placed, and the screw 51 is rotated downward by the wrench. Feeding, at this time, the bottom end of the screw 51 will gradually press against the upper surface of the front plate 22, while the front edge portion of the lower plate 32 is lifted up, and finally the screw elements 34 are locked to achieve an elevation angle. Adjustment work.

Referring to Figures 5 and 6, the presser 1 of the present invention is mounted on a overlock sewing machine (not shown). The overlock sewing machine comprises a presser arm 81, a needle bar 82, and a needle 83. a front feed tooth 84 and a rear feed tooth 85, the needle 83 is threaded and fixed along the center line direction of the needle bar 82, and the presser arm 10 is sleeved at the free end of the presser arm 81 with the sleeve hole 12 thereof. The front feed tooth 84 is disposed at a position below the lower plate 32 of the front presser foot portion 30, and the rear feed tooth 85 is disposed at a lower position of the rear presser foot portion 21.

When the sewing is performed, the presser arm 81 is screwed in. At this time, the presser 1 will follow the presser arm 81 and correspond to the positions of the needle 83, the front feed 84 and the rear feed 85, when When the cloth 9 is flat-sewn, the upper cloth 91 and the lower cloth 92 are stacked on each other, and then fed from the front edge of the front presser foot 30 and the front feed tooth 84, by the front feed tooth 84 and the rear feed tooth 85. When the elliptical motion trajectory of the same size is synchronized, the upper cloth 91 and the lower cloth 92 are sewn by the needle 83 while being gradually sent out to the rear of the presser 1, so that a flat sewing operation can be completed (as shown in the fifth figure). Show).

When the fabric 9 is to be creased (for example, a pleated skirt), the upper cloth 91 is placed from the cloth introduction groove A, and the lower cloth 92 is fed between the front presser leg 30 and the front feed tooth 84. The differential relationship between the front feed tooth 84 and the rear feed tooth 85 must be adjusted to produce elliptical motion trajectories of different sizes, wherein the elliptical actuation trajectory of the front feed tooth 84 is greater than the elliptical motion trajectory of the rear feed tooth 85 (ie, If the amount of movement of the front feed tooth 84 is larger than the amount of movement of the rear feed tooth 85, the lower cloth 92 is wrinkled by the front feed tooth 84 into a wave shape, and is sewn by the sewing needle 83 and gradually sent out toward the rear of the presser 1, so A wrinkled sewing operation can be completed (as shown in Figure 6).

Referring to the seventh embodiment, the presser of the present invention may be in the form of the embodiment, except that the front presser leg 30 of the presser 1' is integrally formed with the presser foot 20, and the front presser foot is formed. The segment 30 is directly bent from the right side of the front plate 22 to be formed, and the lower plate 32 is located directly below the front plate 22, and a cloth introduction groove A is formed between the top surface of the lower plate 32 and the bottom surface of the front plate 22. The equivalent effect of the foregoing embodiment is obtained.

In summary, the general-purpose presser of the sewing machine of the present invention can achieve the intended purpose of use, and solves the lack of conventionality, and is extremely novel and progressive, fully conforms to the requirements of the invention patent application, and converts to the patent law. To file an application, please check and grant the patent in this case to protect the rights of the inventor.

1‧‧‧General-purpose press

10‧‧‧Foot arm

11‧‧‧ Subject

12‧‧‧ sockets

14‧‧‧Pre-protective film

15‧‧‧ Side protection film

20‧‧‧Foot plate

21‧‧‧After the presser foot

22‧‧‧ front board

30‧‧‧Front presser foot

31‧‧‧Upper board

32‧‧‧ Lower board

33‧‧‧ side panels

A‧‧‧ fabric introduction slot

40‧‧‧ cloth thickness adjustment mechanism

50‧‧‧ elevation adjustment mechanism

Claims (7)

A universal press for a sewing machine, comprising: a presser arm; a presser plate connected to one end of the presser foot, the presser foot having a rear presser leg and extending forward along the rear presser leg a front plate; a front presser leg comprising an upper plate, a lower plate parallel to the upper plate and below the lower plate, and a side plate connecting the upper plate and the lower plate to form a "U" shaped plate body The upper plate is connected to the front plate and the lower plate is located on the front side of the rear presser leg, and a fabric introduction groove is formed between the lower plate and the front plate; and an elevation adjustment mechanism includes a screw and a a nut and a screw hole formed in the upper plate, the screw sequentially passes through the nut and the screw hole, and the end portion of the screw presses the front plate, so that the front edge portion of the lower plate can be upward Rise up. A universal press for a sewing machine according to claim 1, wherein the rear presser leg and the front plate are formed with a height difference. A universal press for a sewing machine according to claim 1, wherein the sewing machine is an overlock sewing machine. The universal press for a sewing machine according to claim 1, further comprising a cloth thickness adjusting mechanism, wherein the cloth thickness adjusting mechanism comprises a long groove formed in the upper plate, a screw hole formed in the front plate, and a screw hole a screwing member, the upper plate is overlapped on the front plate, the screwing member passes through the long slot and the screw hole is screwed, and the front presser foot segment can be adjusted forward and backward on the front plate. A universal press for a sewing machine according to claim 1, wherein the presser arm has a main The body is provided with a set of holes and a front protective sheet and a side protective sheet. A universal press for a sewing machine according to claim 5, wherein the main body is formed with a claw hook through which the claw hook is coupled. The universal press of the sewing machine of claim 1, wherein an intermediate slot of the rear presser leg is provided with an open slot.