TWI484080B - Guiding device for cloth feeding mechanism - Google Patents

Description

Guide structure of the feeding mechanism

The invention relates to a guiding device for the feeding tooth of the sewing machine guiding the feeding mechanism to be surely moved and the matching structure thereof, so as to achieve the purpose of accurate feeding stroke and improved sewing quality.

According to the sewing operation of the sewing machine, the feeding mechanism drives the feeding teeth to move the cloth forward or backward at a high speed in the X-axis direction, and cooperates with the stylus to sew out the designed pattern; wherein, the feeding tooth It is located at the end of the feeding mechanism, and the accumulated error caused by the assembly of the parts of the feeding mechanism or the assembly of the parts causes the Y-axis direction to be skewed when the feeding teeth are pushed, which cannot be accurately along the X. The sewing is carried out in the direction of the shaft, resulting in poor quality of the sewing seam, so it needs to be improved.

In view of the above-mentioned problems of the conventional use, the inventors believe that it is necessary to cooperate with the feed tooth in the process of the movement in the X-axis direction without causing a deviation in the Y-axis direction, thereby designing, thereby simultaneously improving the delivery. The accuracy of the cloth sewing and the guiding device for adjusting the guiding position.

The main object of the present invention is to provide a guiding structure of a feeding mechanism, which is provided with a guiding device and a guiding device at a position opposite to the frame of the sewing machine that pushes the feeding teeth under the needle plate of the sewing machine. The guiding device is configured to be opposite to the feeding tooth of the feeding mechanism, and is provided with a first guiding portion and a second guiding portion, wherein the guiding portions are mutually guided so that the feeding teeth are arranged The movement does move in the X-axis direction, keeping the feeding process on the exact path to ensure the quality of the seam.

Another object of the present invention is to provide a guiding structure for the foregoing feeding mechanism, wherein the guiding device has an adjusting member disposed on the base, and the adjusting member is disposed at an eccentric position of the adjusting member with respect to the end portion of the feeding tooth. a second guiding portion, wherein the first guiding portion is disposed on the feeding tooth, and the first guiding portion of the guiding device can be finely adjusted to take the original possible error value of the feeding mechanism. When the feeding teeth are moved, the improper accumulation effect of the other errors is no longer caused, and the quality of the sewing seam is affected; and the adjusting member is further disposed with the positioning member in the vertical direction of the adjusting member, and is matched by the threaded screw lock. , tighten the positioning of the adjustment piece.

A further object of the present invention is to provide a guiding structure of the above-mentioned feeding mechanism, wherein the guiding structure between the base and the feeding tooth adjusts the position of the two guiding portions, that is, at the feeding tooth The adjusting member having the second guiding portion and the positioning member are disposed, and the base is provided with the first guiding portion, and the mutual guiding of the two guiding portions can achieve the foregoing purpose.

In order to enable your review committee to have a better understanding and understanding of the purpose, features and effects of the present invention, please refer to the following [Simplified Description of the Drawings] as follows: Please cooperate with Figures 1, 2 and 3, A machine base 20 is disposed under the needle plate 10 of the sewing machine, and a feeding mechanism 30 is further disposed on the frame 20, and a feeding tooth 31 pushed by the feeding mechanism 30 is disposed at the grid-shaped hollow groove structure of the needle plate 10. The bottom of the feed tooth 31 is fixed on a top surface of a rectangular horizontally disposed tooth holder 32, and both ends of the tooth holder 32 are disposed on a feed link set 33, and are driven by the feed piece. The structure of the link set 33 is a conventional structure and will not be further described herein; and the feed tooth 31 drives the forward and backward horizontal movement direction of the cloth to be the X-axis direction, and the direction of the vertical height of the X-axis direction is Z. The axial direction, the horizontal direction to the left or the right is the Y-axis direction, which is the direction of the improper horizontal offset of the feed tooth; and the feature of the present invention is that the guiding structure is opposite to the base 20 of the feed mechanism 30. The position further has a guiding device 40 disposed on the base 20 and a matching structure to achieve displacement of the feeding teeth 31 of the feeding mechanism 30 in the X-axis direction and a relative displacement margin in the Z-axis direction. The purpose of the offset is not to cause an improper Y-axis direction; wherein the tooth holder 32 below the feed dog 31 is opposite to the guiding device 40 with two guide portions, that is, at the bottom center of the tooth holder 32. At a position directly below the feed dog 31, a groove-shaped first guide 320 extending in the X-axis direction is provided. The recess of the first guiding portion 320 is downward, and the depth of the first guiding portion 320 is slightly larger than the height of the feeding tooth 31 in the Z-axis direction; the housing 20 has a Z-axis extending direction. The end wall 21 is further provided with a part 22 at a position relative to the guiding device 40. A positioning hole 210 is defined in the direction perpendicular to the end wall 21, and the central portion of the fixing portion 22 is along the Z axis. An adjustment hole 220 is disposed in the direction, the positioning hole 210 and the adjustment hole 220 Forming a vertical communication with each other and having an internal thread at an inner diameter of the positioning hole 210 to fit the opposite member of the guiding device 40 therebetween; The guiding device 40 has an adjusting member 41 and a positioning member 42. The adjusting member 41 has a rod-shaped adjusting portion 411 for being sleeved in the adjusting hole 220, and the adjusting portion 411 is exposed to the adjusting portion. The bottom end of the hole 220 is further provided with an adjusting end 412 which can be driven by a single-word screwdriver. The other end of the adjusting portion 411 extends from the adjusting hole 220 and is provided with a disc-shaped guiding portion 413. The second guiding portion 414 is protruded from the eccentric position on the end surface of the first guiding portion 320 of the tooth holder 32. The adjusting portion 411 is rotated to change the position of the second guiding portion 414. The engagement with the first guiding portion 320 can be adjusted due to the mechanical error of the feeding link set 33. After being adjusted to the accurate position, the positioning member 42 can be engaged with the adjusting member 41 so that The adjustment member 41 is kept stationary and does not rotate.

The outer diameter of the positioning member 42 has an external thread, and is screwed into the positioning hole 210, and the driving member 420 is exposed at the end of the positioning hole 210 to be a concave hexagonal driving end 420 for embedding the hexagonal tool. When the positioning member 42 extends into the adjusting hole 220, the end portion of the adjusting member 41 abuts against the end of the adjusting member 41 is a conical end 421, so that the adjusting member 41 is adjusted, and the abutting end 421 is abutted. The adjustment member 41 is kept in a state of not rotating.

As can be seen from the above structure, the present invention has the following effects:

1. True guidance: the feed dog 31 and the tooth holder 32 are surely moved along the guide of the guiding device 40 to maintain an optimal path, please cooperate with the fourth and fifth figures, the adjustment member 41 The second guiding portion 414 can cooperate with the first guiding portion 320 at any position of the feeding tooth 31 at any position of the feeding stroke, so as not to cause an improper Y-axis direction shifting action, so that the quality of the sewing seam is maintained. The best state.

2. Adjustable operability is high: the adjustment portion 411 of the adjusting member 41 and the second guiding portion 414 are disposed at an eccentric position of each other, so that the second guiding portion can be rotated when the adjusting portion 411 is rotated The portion 414 moves over a larger range to achieve high adjustment suitability and ease of operation.

3. Simplification of the structure: the structure of the guiding device 40 and the components and structures of the guiding device 40 are not a complicated structure, and the guiding is achieved only by the arrangement of the adjusting member 41 and the positioning member 42. Adjusting the position of the guide makes the overall operation easier.

Alternatively, as shown in FIG. 6, the first guiding portion 320' is disposed at the bottom of the tooth holder 32 of the feed tooth 31, and the axis of the adjusting member 41' of the guiding device 40' is along the X-axis direction. The positioning member 42' is disposed in the Z-axis direction, and the positioning hole 210' of the base 20 and the position of the adjusting hole 220' are also matched with the changing position, and the foregoing functions can still be achieved.

As shown in FIG. 7 , the positioning base 321 is disposed on the tooth holder 32 in the X-axis direction, and an adjustment hole 322 is defined in the vertical direction of the end of the positioning hole 321 . The guiding device 40 ′′ has a The adjusting member 41" and a positioning member 42" are screwed into the positioning hole 321, and the adjusting member 41" is screwed into the adjusting hole 322, and the adjusting member 41" and the positioning The structure of the member 42" is the same as that of the foregoing embodiment, and a second guiding portion 414" is disposed at one end of the adjusting member 41", and the end wall 21 of the base 20 is opposite to the second portion. The guiding portion 414 ′′ is further provided with a groove first guiding portion 211 , the first guiding portion 211 extends along the X-axis direction and the notch faces the second guiding portion 414 ′′, and the first guiding portion 211 The depth system is slightly larger than the height in the Z-axis direction of the upward and downward displacement of the feed dog 31, and also achieves the functions of the foregoing embodiments.

As shown in FIG. 8 , the first guiding portion 310 of the present invention or the second guiding portion of the guiding device can be directly disposed on the feeding tooth 31, and can also achieve the functions of the foregoing items, such as As shown in the figure, the first guide portion 310 is directly disposed on the feed dog 31, and the second guide portion may be disposed on the feed dog.

"this invention"

10. . . Needle plate

20. . . Machine base

twenty one. . . End wall

210. . . Positioning hole

twenty two. . . Fixed parts

220. . . Adjustment hole

30. . . Feeding mechanism

31. . . Feeding tooth

310. . . First guide

32. . . Adapter

320. . . First guide

33. . . Feeding link set

X‧‧‧axis direction

Y‧‧‧ axis direction

Z‧‧‧Axis direction

40‧‧‧Guide

41‧‧‧Adjustment

411‧‧‧Adjustment Department

412‧‧‧ adjustment end

413‧‧ ‧ Guidance Department

414‧‧‧Second guidance

42‧‧‧ Positioning parts

420‧‧‧Driver

421‧‧‧

320’‧‧‧First Guide

40’‧‧‧Guide

41’‧‧‧Adjustment

42'‧‧‧ Positioning parts

210’‧‧‧Positioning holes

220’‧‧‧Adjustment hole 220’

321‧‧‧Positioning holes

322‧‧‧Adjustment hole

40"‧‧‧Guide

41"‧‧‧Adjustment

414”‧‧‧Second Guide

42"‧‧‧ Positioning parts

211‧‧‧First Guide

310‧‧‧First Guide

Fig. 1 is a perspective view of a three-dimensional assembly of the present invention.

Figure 2 is a partially exploded perspective view of the first aspect of the present invention.

Fig. 3 is a partially exploded perspective view of the second embodiment of the present invention.

Figure 4 is a schematic cross-sectional view of the combination of the present invention.

Fig. 5 is a schematic view showing the combined operation of the present invention.

Fig. 6 is a schematic view showing the guide device of the present invention which is disposed on the end wall in the X-axis direction.

Figure 7 is a schematic view showing an embodiment of the guiding device of the present invention which is disposed on a tooth holder below the feed dog and has a second guide portion extending from the first guide portion provided to the end wall.

Fig. 8 is a schematic view showing the first guide portion of the present invention directly disposed at the bottom end of the feed dog.

10. . . Needle plate

20. . . Machine base

twenty one. . . End wall

210. . . Positioning hole

twenty two. . . Fixed parts

220. . . Adjustment hole

30. . . Feeding mechanism

31. . . Feeding tooth

32. . . Adapter

320. . . First guide

33. . . Feeding link set

X-axis direction

Y-axis direction

Z-axis direction

40. . . Guide device

41. . . Adjustment piece

411. . . Adjustment department

412. . . Adjustment end

413. . . Guidance department

414. . . Second guide

42. . . Positioning member

420. . . Drive end

421. . . Arrival

Claims (8)

A guiding structure of a feeding mechanism, wherein the guiding structure is disposed at a position opposite to a feeding tooth pushed by a feeding mechanism of the sewing machine at a position below a sewing machine needle plate, and the feeding a tooth holder is arranged at the bottom of the tooth, and the tooth holder pushes the feeding mechanism forward or backward along the X-axis direction, and the feeding tooth drives the cloth to move forward and backward in a horizontal direction of the X-axis direction; the guiding structure has a first a guiding portion and a second guiding portion of a guiding device, wherein the first guiding portion is disposed on the tooth holder, the second guiding portion of the guiding device is disposed on the base, or the first guiding portion The second guiding portion of the guiding device is disposed on the tooth holder, and the two guiding portions guide the feeding teeth to be displaced in the X-axis direction. The guiding structure of the feeding mechanism of the first aspect of the invention, wherein the guiding device has an adjusting member, the adjusting member is disposed on the base, and one end of the adjusting member is adjustable, The adjusting member is provided at the other end with the movable second guiding portion. The guiding structure of the feeding mechanism according to claim 2, wherein the guiding device further has a positioning member, the outer diameter of the positioning member is formed into an external thread shape, and the screw is screwed on the base to be positioned. The adjustment piece. The guiding structure of the feeding mechanism according to claim 1 or 2 or 3, wherein the first guiding portion is formed in a groove shape along the X-axis direction of the tooth holder, the first guiding The depth of the portion is greater than the Z-axis displacement of the feed tooth perpendicular to the elevation height of the X-axis; the base has a Z-axis An extending end wall, the end wall is further provided with a certain portion with respect to the guiding device, and a positioning hole is disposed perpendicular to the end wall direction, and the fixing portion is provided with an adjusting hole along the Z-axis direction for the The adjusting member of the guiding device is disposed, and the positioning hole communicates with the adjusting hole and the positioning hole has an internal thread for the positioning member of the guiding device. The guiding structure of the feeding mechanism according to claim 1, wherein the first guiding portion is disposed at a bottom of the tooth holder of the feeding tooth, and the guiding device has an adjusting member, and the adjusting member has The shaft center is disposed along the X-axis direction, and the base is respectively provided with a positioning hole and an adjusting hole to fix the positioning member of the guiding device and the adjusting member. The guiding structure of the feeding mechanism of the first aspect of the invention, wherein the tooth holder is provided with an adjusting hole, the guiding device has an adjusting member received in the adjusting hole, and the adjusting member has the same The second guiding portion is provided on the base relative to the second guiding portion. The guiding structure of the feeding mechanism according to the sixth aspect of the invention, wherein the tooth holder is further provided with a positioning hole in the X-axis direction, and the positioning hole communicates with the adjusting hole for the guiding device A positioning member is screwed into the positioning hole, and one end of the adjusting member is extended with an eccentric position of the second guiding portion, and an end wall of the housing is further provided with respect to the second guiding portion. a first guide portion having a groove shape extending in the X-axis direction and having a depth greater than a displacement of the feed tooth perpendicular to the Z-axis direction of the elevation height in the X-axis direction. The guiding structure of the feeding mechanism according to claim 1, wherein the second guiding portion or the first guiding portion of the guiding device is directly disposed on the feeding tooth.