JPS60108080A - Method and apparatus for differential walking of flat stitching sewing machine - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

Detailed Description of the Invention The present invention is to divide the upper feed dog of an interlock stitch sewing machine into two parts in the front and back in the same way as the lower feed dog, and to make the feed amount of the divided upper front feed dog smaller than that of the upper and rear feed dog. By increasing or decreasing the size, differential feed is possible, and the lower limit of the elliptical trajectory drawn by the upper feed dog that adapts to the predetermined sewing material is made elastic, allowing the upper and lower materials to be sewn in a stepped manner. Even if there is a change in the thickness of a part or a protruding part, the lower limit of the upper feed dog is automatically flexibly adjusted in response to the change in the thickness of the fabric, and the upper feed dog can be sewn to suit the thickness of the fabric. This invention relates to a differential lifting method and device for an interlock stitch sewing machine, characterized in that the presser foot and the upper feed dog are both raised and lowered by pressing the presser foot lifting pedal. .

Conventionally, in this type of interlock stitch (flat stitch, Miki needle) sewing machine, when sewing or wrapping lace, tape, rubber, etc. that has a different elongation than the sewing material into the sewing material, it is necessary to sew the material and lace, Sewing by matching the length of tape, rubber, etc. (This is difficult, so pullers are installed before and after the presser foot and feed dog, and the appropriate tension is applied to the lace, tape, rubber, etc. when sewing.) However, there are still major drawbacks such as unreasonable looseness in the sewing fabric, twisting of lace, tape, rubber, etc., and the need for skilled adjustment by hand in order to properly equip it. .

However, in the present invention, the upper feed tooth and the lower feed tooth are divided into two parts, front and rear, and the forward and backward upward advances of both can be adjusted in size, so even when sewing different materials with different elongations. This prevents the fabric from shifting at the rising end.
It is possible to sew by matching the length of the sewing fabric and lace, tape, rubber, etc., and prevents defective sewing if one of the fabrics has an unreasonable margin or the lace, tape, rubber, etc. is twisted. In addition, it has the effect of facilitating the attachment and detachment of the fabric to the interlock stitch sewing machine.

Reference will now be made in detail to the accompanying drawings that illustrate one example of the implementation of the invention. 1 is the arm shaft, which is already used by those who use the arm of a flat-shaped (hei-2, Miki needle) sewing machine. The arm shirt) is fitted with two known eccentric wheels,
The base of the upward movement shaft connecting rod 3 is fixed to the outer ring 2a of the eccentric ring 2, and the well-known upward movement l+l[
The tip of the upper feed shaft arm 5 attached to the upper feed III] 4 and the tip of the upper feed shaft connecting rod 3 are rotatably connected, and the rotational speed Tsh of the arm shaft 1 is adjusted to the swinging motion of the upper feed III] 4. It is something that converts. Reference numeral 6 denotes a swinging arm that can move back and forth, and is fixed to the tip of the upper feed shaft 4 that protrudes from the box-shaped projection B on the rear surface of the arm A. 7 is the upgrade of the existing 9
A longitudinal movement axis rotatably supported on the mounting base C, 8 is an arcuate longitudinal movement adjustment arm whose base end is fixed to the movement axis 7, and 9 is a slide 9 that is inserted into the movement adjustment arm 8. child, slider 9
A shaft 9a is provided protruding from one side, and the shaft 9a and the tip of the longitudinal motion axis swinging arm 6 are rotatably connected by a longitudinal momentum connecting rod 10. Reference numeral 11 denotes an upper feed forward/backward movement adjustment arm whose one end is rotatably supported on the upper feed device table C, and the other end is attached to the tip of the shaft 9a of the slider 9 to adjust the upward gear forward/backward movement wJ amount adjustment rod 12. It is connected by . Reference numeral 13 indicates an upwardly moving tooth longitudinal momentum adjustment pointer, whose base is fixed to the one end of the upwardly moving nine teeth longitudinal momentum adjusting arm 11, and an adjustment screw 14 is inserted into the tip. An arc-shaped hole 15a protruding from the upward tooth forward/backward movement wJ amount adjustment scale plate 15 fixed to the protrusion B
By inserting the screw 14 into the holder so that it can be slidably adjusted and fixed, and by moving the position of the adjusting screw 14 onto the scale base 15, the adjustment pointer 13, the adjusting arm 11, and the adjusting rod 12 are The slider 9 is made slidable in both directions of the proximal end of the arc-shaped longitudinal momentum adjustment arm 8, and serves as a longitudinal momentum adjustment device for upwardly moving teeth. At this time, when the slider 9 moves to the base of the adjusting arm 8, the amount of momentum increases, and when it moves to the tip, it decreases. Reference numeral 16 denotes an upper rear feed tooth front and back movement control arm fixed to the distal end of the longitudinal movement shaft 7, and numeral 17 represents an arcuate upper forward movement adjustment arm fixed to the distal end of the movement shaft 7. 1.8 and 19 are the upper front and rear feed teeth of husband 4, which are divided into two parts in the same way as the lower front feed dog 20 and the lower rear feed dog 21, which are divided into two parts in the front and back that move back and forth and up and down in an elliptical trajectory. It is.

Reference numerals 22 and 28 are L-shaped upper and rear feed teeth mounting bases, with upper and rear feed teeth 18 and 19 fixed to the tips of each.They can be slid forward and backward and up and down, and their mutual sides are attached to each other as shown in Figure 5. They were placed in close contact as shown in the figure. Reference numeral 24 denotes an upper forward feed tooth slider inserted into the arcuate upper forward feed tooth back-and-forth movement amount adjustment arm 17, and a shaft 24a is protruded from one side of the slider 24. At C, the base of the upper forward-feeding both longitudinal momentum adjustment arm 26, which is rotatably supported by a lever 26a via a return spring 25 whose intermediate portion springs so that the base always rises, is connected to the shaft 24a and the upper forward-feeding arm 26. The distal end of the adjusting arm 26 is slid or fixed onto the arcuate upper forward feed tooth momentum scale scale plate 29 using the adjusting screw 28, and the slider 24 is connected to the adjusting arm 17. The length between the proximal end and the slider 24 is adjusted by making it longer or shorter than the length of the upper front 16 of the north rear feed tooth. This is a back-and-forth swing amount adjustment device. Reference numerals 80 and 81 denote upper front and back feed both front and rear movement connecting rods, which connect the shaft 24a of the upper front and rear feed dog slider 24 and the tip of the upper and rear feed dog front and rear movement cutters 16 to the upper and rear feed teeth number A'. 22. Connecting shafts 80a and 81a made of long pin screws with heads are connected to the L-shaped depressed angle portions of 28, and the upright portions 22a and 21a of the respective mounts 22 and 23 do not come into contact with the corner portions. It is curved, and its tip is a flat surface 32a.

As shown in FIG. 10, it is rotatably connected to the base of the upper and rear feed dog mount retaining rods 82 and 88 designated as 33a. Reference numeral 34 denotes a vertically movable arm, which is an extension of the tip of the upward movement shaft 4 and is fixed to an extending end that is rotatably supported on the upper feeder table C; Swinging rod 3
It is a vertically movable connecting rod rotatably connected to the tip of 4.

Reference numeral 36 indicates a vertical momentum adjustment screw for a hook-shaped upper feed tooth, which is inserted into the tip of the connecting rod 35 and whose intermediate portion is rotatably supported on the upper feed device stand C by a shaft 87a. By fitting into the circular arc hole 37 (3) bored in the circular arc part 37b at the tip of the arm 37 and sliding the screw 36 between both ends of the toe of the circular part 37b, the upper forward and backward movement 9 teeth 18, 19 is a vertical swing amount adjusting device, and when an appropriate amount of vertical movement is determined, the screw 36 is tightened and fixed.

39.40 is an upper longitudinal feed dog vertical movement link, and a vertical movement link pin 3 is attached to the base of the hook-shaped vertical movement adjustment arm 37.
8 is fixed, one end is rotatably supported on both ends of the pin 38, and the other end is attached to the upper longitudinal feed tooth mounting base: 22.28's upright portion 22a, 28a tip and short headed pin screw 89a, 40a
The upper front and rear feed teeth 18 and 19 are connected to each other to move them up and down. 41.42 is the number of upper front and rear feed teeth (
=J The base is held on the upward movement device table C by the support arms of the table holding rods 32 and 33. The base is rotatably supported on the rod support arm shaft 43, and the tip portions are attached to the upper and rearward feed tooth mounting bases, respectively. Retaining rod 82, . 88 is rotatably supported by short headed pin screws 41a and 42a as shown in FIG. Reference numeral 44 denotes a holding rod presser, which has a bifurcated shape that presses the flat surfaces 32a and L(a) at the tip of the upper/backward feed 9-tooth mount holding rod 82. Holding rod 82.83
This ensures that the pressure is applied evenly. Reference numeral 45 denotes a holding rod presser shaft, the base of which is fixed to the holding rod presser 44, the tip of which is slidably supported on the lifting device stand C, and the holding rod presser shaft 46 is similarly attached to the tip of the holding rod holding shaft. It is pressed by a spring pressure adjustment screw 47 inserted into the feeder stand C, and the support arm 41°4
2. Upper front and rear feed dog mounting base holding rod 82.88 and upper III
Upper front and back feed dog 18 via rear feed gear tooth count, 28
．． Reference numeral 19 denotes a receptacle that is arranged to accommodate changes in thickness of stepped portions, protruding portions, etc. of the sewing material. Reference numeral 48 denotes an upper feed tooth outer arm, which has two limbs 48a at its base end, and whose intermediate portion is rotatably supported on the upper feed device stand C by an upper feed tooth outer arm shaft 49. The limb portion 48a is arranged so as to be located below the flat surfaces 82a, 88a of the upper front feed dog mount holding rod 32°33. 50 and 51 are screws for adjusting the lower and upper limit positions of the upper feed dog installed on the upper and lower upper feed device stands C at the tips of the upper feed dog folding arms 48, respectively, to perform trial sewing in advance depending on the properties such as the thickness and elasticity of the fabric. It is adjusted by 52.
58 are the upper and rear feed dog height adjustment screws, respectively, and are inserted into the screw holes 821) and +8b drilled at the tips of the flat surfaces 32a and 38a of the support rods 82 and 88, respectively, and the screws 52 and 53 are inserted.
By turning, the tips come into contact with the two limbs 48a of the lower upper feed dog outer arm 48, and the distances from the upper surface of the throat plate 72 to the tips of the upper front and back feed dogs 18 and 19 are adjusted.

54 is an existing presser foot lifting arm whose intermediate part is rotatably supported by a presser foot lifting arm shaft 55 on arm A; 2: chain 5 at the base;
, 6 is equipped with a presser foot lifting pedal 57, and by stepping on the pedal 1157, the presser foot is pivoted to the arm A via the presser foot connecting rod 55a attached to the shaft 55! 1III58 is placed outside, and the A1 presser foot 59f at the tip of the foot 58 is used to lift and unload. 60 base end and the tip of the presser foot lifting arm 54 are connected by a connecting rod 62,
Both are existing devices that work in conjunction with the presser foot lifting device described above. A connecting ring 63 connects the tip of the movement direction switching arm 60 and the tip of the upper feed dog lowering arm 48. When the presser foot lifting pedal 57 is depressed, the upper feed dog is moved together with the presser foot 59. Upper front and rear feed teeth 18 via outer arm 48. ．． 1
9 is used for frying and wholesale. Reference numeral 64 denotes a differential pedal, which is installed via a chain 65 between the return spring 25 at the intermediate portion of the upper front feed dog longitudinal movement Ia amount adjustment arm 26 and the base of the stack 26, Front feed tooth thickness movement adjustment scale plate 29
This is used especially when the upper front feed dog back and forth movement adjustment arm 26 is unfixed by the adjustment screw 28 and requires differential movement of the upper front feed dog 18. Reference numerals 66 and 67 indicate upper and lower forward feed movement adjustment upper and lower stoppers, which are installed on the upper and lower upper feed device stands C at the intermediate portions of the upper and lower forward movement movement adjustment arms 26. This is to adjust the upper and lower limits of the amount of differential movement of the upper forward nine teeth 18 when the fixation is released and the differential beder/L'64 is used. 68
．． Reference numeral 69 denotes an upper feeder stand mounting bracket, which is protruded from the upper and lower rear portions of the sewing machine arm A, and has threaded holes 70 and 70 for attaching the upper feeder stand C, respectively. 71 is a needle.

The present invention has the above-described configuration, and when using the same, the back and forth and up and down swinging movements of the upper front and back feed dogs 18 and 19 are separately controlled by the adjustment screws 14 on the upper feed dog back and forth movement adjustment dial plate 15. By arbitrarily adjusting the position of the vertical movement adjustment pointer 13 and the position of the vertical movement connecting rod 35 on the arcuate portion 87b of the vertical movement adjustment arm 37 using the vertical movement adjustment screw 36. Furthermore, the elliptical locus of the upper feed teeth 18 and 19 can be adjusted independently of that of the lower feed teeth 20 and 21, and differential feed between the upper and lower feed teeth can be achieved as in the conventional case. In this case, ya++l Mtr screw 14
The upper feed dog longitudinal momentum adjustment scale Saka 150 circular arc hole 15a
When the slider 9 is moved toward the proximal end, the slider 9 moves toward the distal end of the arcuate longitudinal momentum adjusting arm 8, and the constant rocking motion of the longitudinal motion axis swinging arm 6 is transmitted to the longitudinal motion axis 7 in a small amount. , on the contrary, it is moved toward the tip of the arcuate hole 15a.

Furthermore, the front and back and vertical movements of the upper feed teeth 18 and 19 @ the adjustment device are separated, so that the upper t'+il'& feed teeth 18.1
Adjustment of the forward/backward movement υ between By arbitrarily adjusting with the adjustment screw 28 on the movement adjustment scale plate 29,
The length between the base end of the stack 17 and the slider 24 is adjusted in size compared to the fixed length of the upper and rear feed dog front and back movement upper 16 which is similarly fixed to the front and rear movement axis 7, and the second front feed dog 18 The feed amount can be arbitrarily adjusted to be larger or smaller than the feed amount of the upper and rear feed dogs 19,
Even when sewing lace, tape, rubber, etc. that has a different elongation than the sewing fabric, it is possible to match the length of the fabric and lace, tape, rubber, etc. when sewing, and on the other hand. An unreasonable margin of 9 was created on the fabric of
This eliminates defective sewing caused by twisting of lace, tape, rubber, etc. Also, the upper front and back feed tooth mounting base 22
．． The flat surfaces 82a and lla of the upper front and back feed tooth mounting base holding rods 82 and 88 that support the L-shaped corners of 23 are provided with the holding rod presser 4.
4 and a retaining rod presser shaft 45, a retaining rod presser spring 46 is installed, so that the upper front and rear feed dogs 18 and 19 and the throat plate 7
Even if there is a stepped part or protruding part of the sewing material between the two, the upper and rear feed dogs 18 and 19 individually rise by 1 against the elasticity of the holding rod pressing spring 46, so that the stepped part or protruding part, etc. This eliminates the drawback that a good sewing effect cannot be obtained because only the portion where the thickness of the fabric changes is subjected to strong pressure from the upper and lower feed dogs 18, 19, 20°21.

Furthermore, reading (= flat surface 32a of one holding rod 32.83).

88a Tip 4A is the upper rear feed dog height adjustment screw 52.
58, and lower the two limbs 48 of the upper feed dog lifting arm 48.
a and by adjusting the screws 52 and 58, the distance from the top surface of the throat plate 72 to the tips of the upper front and rear feed teeth 18 and 19 can be adjusted to suit the thickness of the fabric to be sewn. You can choose the optimal spacing. Further, since an upper feed south lower limit position adjustment screw 50 is installed above the tip of the upper feed dog lifting arm 48, by adjusting the screw 50, the upper and lower feed dogs 18 collide and mesh with each other on the upper surface of the throat plate 72. ，
19, 20. Adjusting the degree of collision and interlocking in 21, it is possible to prevent scratches and other harmful problems from occurring on the product when sewing thin fabrics or fabrics that are prone to scratches. . Furthermore, in the present invention, the tip of the upper feed dog lifting arm 48 is connected to the presser foot lifting arm 54 via the connecting rod 62, the motion direction changing arm 60, and the connecting ring 63, so that the presser foot lifting arm 54 cannot be stepped on. As is well known, the presser foot 59 is raised via the presser foot connecting rod 55a, and the upward movement 9
The tip of the tooth lifting arm 48 is lowered by the connecting ring 63, the two limbs 48a at the base are raised, and the upper longitudinal feed dog 18.19 is raised via the upper longitudinal feed 9 tooth mounting base holding rod 32°33. This eliminates the need to lift the presser foot with a pedal and manually raise the upper feed dog when inserting and extracting fabric from the sewing machine at the start and end of sewing.
This improves the efficiency of sewing work. In addition, in the present invention, since the differential gear (v64) is installed in the middle part of the upper forward forward movement adjustment arm 26 via the chain 65, the adjustment on the upper forward movement nine tooth momentum adjustment date plate 29 is provided. By releasing the fixation of the arm 26 with the adjustment screw 28 and stepping on the beda/l'64, the feed amount of the upper front feed dog 18 can be adjusted to be larger or smaller than the feed amount of the upper and rear feed dog 19 even during sewing. Depending on the object to be sewn, it can be partially differential or not.

[Brief explanation of the drawing]

Figure 1 is a perspective view of the main parts of an interlock stitch sewing machine equipped with the device of the present invention as seen from the rear, and Figure 2 is a top and bottom view of the machine. 1111 of the liJ rear feed and the mechanism of the vertical movement section.
Figures 3 and 3 show the mechanism of the elevating part of the 9 ascending teeth, and a perspective view of the main part, and Fig. 4 shows the mechanism of the connecting part between the longitudinal and vertical movement parts of the ascending 9 teeth and the ridge (ridge). Fig. 5 is a perspective view of the main part showing details of the upper and rear feed dog mounts in a single position, Fig. 6 is a sectional view taken along line L'l-D in Fig. 5, and Fig. 7 The figure is a perspective view showing details of the mounting condition of the upper feed dog vertical movement adjustment arm, Figure 8 is a perspective view of the main part of the upper feed dog vertical movement adjustment device, and Figure 9 is the upper feed dog longitudinal movement. A perspective view of the main parts of the adjustment section, Figure 10 shows the upper back and forth feed 9 gears and the retaining rod 9.
FIG. l...Arm shaft, 2...Eccentric wheel, 2a...
Outside ff, 3...Top feed shaft connecting rod, 4...Top feed shaft,
5...Upper feed axis arm, 6...Back and forth movement axis swinging arm, 7...
・・Anteroposterior movement axis, 8・・Arc-shaped longitudinal movement member adjustment arm, 9・
... Slider, 9a... Axis, 10... Back-and-forth momentum connecting rod, 11... Upper feed both longitudinal momentum adjustment arms, 12... Upper feed tooth m] Back motion landscape adjustment rod, 13... Upward tooth forward and backward movement adjustment Finger tooth forward and backward movement upper, 17...Circular upper forward and backward feed Both forward and backward movement adjustment arm, 18...Upper IJ feed dog, 19
・Upper rear feed dog, 20...Lower front feed dog, 21...Lower edge j: A T)? ,,22...Upper forward feed number of teeth,
22a... Standing part, 23... Upper backward feed 9 tooth mounting base, 2
8a... Standing part, 24... Upper forward tooth slider, 24a
... Shaft, 25 ... Return spring, 26 ... Upper forward feed both front and rear movement adjustment arms, 26a ... Shaft, 27 ... Upper forward feed tooth momentum adjustment rod, 28 ... Adjustment screw, 29...Circular upper front feed tooth momentum entrustment: giant plate, 30...Upper forward feed both back and forth movement connecting rod, 302 series shaft, 31...Upper rear feed tooth front and back Movement connecting rod, 31...Connecting shaft, 32...
... Upper front feed dog mount holding rod, 32 ei... Flat surface, 32b... Screw hole, 33... Upper rear feed dog mount holding rod, 88a... Flat surface, 831)... Screw hole-g4
... Vertical movement swinging arm, 35 ... Vertical movement connecting rod, 3
6... Vertical momentum adjustment screw, 37... Upward toothed vertical momentum adjustment arm, 8/7a... Shaft, 37b... Arc-shaped part, 37C- Arc-shaped hole, 38... Vertical interlocking link. pin,
39... Upper front feed dog vertical movement link, 89a... Short headed pin screw, 40... Upper rear feed dog vertical movement link, 40a... Short headed pin screw, 41.42...・Support arm, 41a, 42a... short pin screw with head, 43・
・・Holding rod support arm shaft, 44 ・・Holding rod holder, 45・・
・Holding rod presser shaft, 46... Holding rod presser, 47...
・Spring pressure adjustment screw, 48...Upper tooth gear, lowering arm, 4
8a...Two limbs, 49...Upper feed tooth lowering arm axis, 50
...Upper feed dog upper limit position adjustment screw, 51...Upper feed tooth upper limit position adjustment screw, 52...Upper forward feed 9 tooth height adjustment screw, 53...Upper rear feed tooth height adjustment screw , 54... Presser foot lifting arm, 55-- Presser foot lifting arm shaft, 55a... Cloth presser connecting rod, 56... Chain, 57... Cloth presser lifting pedal, 58
. . . Presser foot shaft, 59 . . . Presser foot, 60 . . . Movement direction conversion arm, 61 . Differential pedal, 65・
...Chain, 66...Upper forward feed momentum adjustment upper stopper,
67... Upper forward feed momentum adjustment lower stopper, 68. ,
69... Upward movement device stand mounting bracket, 7o... Screw hole, 71... Needle, 72... Throat plate, A... Arm, B... Box-shaped protrusion, C... Advance device stand. Applicant: Yamato Sewing Machine Manufacturing Co., Ltd. Figure 2 A Figure 4 Figure 5 Figure 7 1! , 8, Figure 9, A et al., Figure 10

Claims (1)

[Scope of Claims] (1) Separately transmits the longitudinal and vertical swinging motions of the upper front and rear feed dogs facing each other to the front and rear divided lower feed dogs that operate in an elliptical trajectory of the interlock stitch sewing machine. A differential upper feed method for an interlock stitch sewing machine, characterized in that the feed amount between the upper front and rear feed dogs is adjusted in size. (III
and adjusts the feed amount between the upper front and rear feed dogs by ↑4゛], and adjusts the upper front and rear feed dogs directly or indirectly t11.
An interlock stitch characterized by pressing from the top with a force of 1 f + 1 force of the same bullet, and adapting to changes in the thickness of the fabric even if there are steps or protrusions on the fabric to be sewn. Differential top feed method for sewing machines. 3. Separately transmits the back and forth and up and down oscillations of the upper front and back feed dogs facing each other from a known upper feed shaft to the front and rear lower feed dogs that operate in an elliptical trajectory of the interlock sewing machine. An interlock stitch sewing machine characterized in that the amount of feed between the upper front and rear feed dogs is adjusted in size, and the distance from the top surface of the throat plate to the tip of the upper front and back feed dogs is adjusted according to the thickness of the sewing material. Differential top feed method. 4. The longitudinal and vertical oscillations of the upper front and rear feed dogs facing each other are separately transmitted from a known upper feed shaft to the front and rear lower feed dogs that operate in an elliptical trajectory and operate on an interlock sewing machine. A differential upper feed method for an interlock stitch sewing machine, characterized in that the feed amount between the upper front and rear feed dogs is slightly adjusted, and the lower limit of the upper feed dog is adjusted according to properties such as thickness and elasticity of the fabric. . 5. The lower feed mK, which is divided into front and rear halves and operates on an elliptical trajectory of the interlock stitch sewing machine, and the front and rear and upper and lower IT movements UJ)J of the upper front and rear feed dogs facing each other are separately separated from the known upper feed axis. 6. transmitting information and adjusting the feed between the upper front and rear feed teeth; The rotation of the arm shaft of the interlock stitch sewing machine can be freely oscillated via an eccentric wheel, and the upper feed shaft of the machine is equipped with a swinging arm for far-cutting and vertical movement of 1).
ti L, back and forth movement (11 hands) The back and forth movement axis is connected to the back and forth movement axis via the front and back swing amount adjustment device f::?, which can freely adjust the swinging movement on the top stack of stamps. The upper front and back feed chamfers (4 units) with the upper front feed dog and the upper and rear feed dogs fixed to the tips, respectively, and the back and forth movement 11i11+ are controlled by the upper front and back feed both front and back adjustment 11 adjustment devices β, and the upper and rear feed dog front and back movement control devices. The upper and lower front and rear feed dogs are connected through a front and rear movement connecting rod, and the upper and lower rear and rear feed dogs are connected to each other through a front and back movement connecting rod, and on the other hand, the vertical movement, the joint top and the stacking movement can be freely adjusted. A differential top of an interlock stitch sewing machine characterized in that the feed surface is connected to a take-down table, and the feed amount of the upper front feed dog can be adjusted to be larger or smaller than the feed rate of the upper and rear feed dogs, making differential operation possible. Feeding device. 7. The rotation of the arm shaft of the interlock stitch sewing machine can be freely swung through an eccentric wheel.The existing upper feed shaft is equipped with a front-rear movement swing arm and a vertical movement wJ swing arm, which allows for front-rear movement swing. Upper back and forth feed dog back and forth swing r with adjustable swing movement r# of moving arm and stack
iJJ is connected to the front and rear feeder tlJIIIll+ via an amount adjustment device, and the upper front and rear feed dog mounting base has the upper front and rear feed dogs fixed to their tips, respectively, and the front and rear feeder! 1ilJII
I [lI and the upper forward feed both front and back swing amount adjusting device, upper rear feed dog front and back movement upper and upper rear feed dog back and forth movement Qi1. The number of upper front and rear feed teeth (- Connect with one unit,
The feed amount of the upper front feed dog can be adjusted to be larger or smaller than the feed amount of the upper and rear feed dogs, enabling differential operation. As in the case of Unkiri, the arc-shaped upper forward feed both longitudinal momentum adjustment arms are fixed, the forward feed tooth slider is inserted into the internal arc-shaped adjustment arm, and the slider of the forward feed tooth is returned to the middle part and rotatably supported via a spring. , upper forward movement tooth forward movement III whose tip can be freely slid or fixed by an adjustment knob on the upper forward movement volume adjustment scale plate.
Equipped with I quantity adjustment UB arm, upper forward feed, both back and forth movements 1itit
l! The base end of the I-joint arm and the shaft on one side of the slider are connected by an adjustment rod, and the ++1I11 of the slider and the number f of the upper front feed teeth are connected.
When the XJ platform is connected with the upper forward forward forward movement connecting rod, a differential pedal is attached via a chain to the middle part of the upper forward forward forward forward movement adjusting arm, and the fixation is released by the adjustment knob. 1. A differential upper feed device for an interlock stitch sewing machine, characterized in that the feed amount of the upper front feed dog is temporarily increased by stepping on the pedal. 8- (1+TI 乎Aa) The rotation of the arm shaft of the sewing machine is +115djJ white through the eccentric wheel, and the forward movement l17IIIW movement; corpse and up and down; i
It is equipped with an L swinging arm, and is connected to the front and rear movement 1IJIIllh through the upper front and back feed dog back and forth swing amount adjustment device, which allows the swinging motion of cutting and stacking to be freely adjusted. , an upper front with the upper front feed dog and an upper rear feed dog fixed at the tips, respectively: a rear feed dog mounting base and the above-mentioned longitudinal movement axis, respectively. The upper front and rear feed dog is connected to the upper front and back feed through a front and rear movement connecting rod, and is connected to the upper front and rear feed dog through a vertical swing amount adjustment device that can freely adjust the vertical swing arm and the stacking rocking motion. By connecting the mounting base, the feed amount of the upper front feed dog can be adjusted to be larger or smaller than the feed amount of the upper and rear feed dogs, enabling differential operation, as well as the upper front and rear feed both front and rear M movement amount adjustment device and the upper front and back feed. The connecting shaft with the tooth mount is rotatably supported by the upper and rear feed dog mount holding rods.
A holding rod supporting arm is rotatably supported at one end of each end of the metal upper feed device base, and the other end of the holding rod supporting arm and the tip of the holding rod are rotatably supported, and the tip of the holding rod is rotatably supported. The holding rod is equipped with a spring pressure adjustment screw to adjust the pressure through the spring,
The rotation of the arm shaft of the interlock sewing machine can be freely swung up and down via an eccentric wheel. Equipped with a back and forth motion swinging arm and said 1! (tl no yaki! III
Upper back and forth feed dog back and forth swing amount adjustment device using I movement as adjustment mechanism f;? The upper front and rear feed dogs are connected to each other through a metal, and the upper front and rear feed dogs are fixed to the tips of the upper and rear feed dogs, respectively, and the longitudinal movement axis is connected to the upper front and rear feeders.
Variable grip adjustment device, one arm that moves the upper and rear feed dog back and forth, and the upper and back feed both back and forth movements are connected via a connecting rod, and one arm that moves the upper and rear feed dogs back and forth, and one arm that moves the upper and rear feed dogs back and forth.
l The swinging arm and the number fq of upper front and rear feed teeth are connected through a vertical swing adjustment device of one company, which is self-registered for the upper front and rear feed dog movement adjustment. The feed amount can be adjusted to be larger or smaller than the feed center of the upper and rear feed dogs, making it possible to perform differential operation.
Insert the front and rear feed dog height adjustment screws, bring the adjustment screws into contact with the upper feed dog lifting arm whose intermediate part is fully rotatable, and turn the adjustment screws 0 times to adjust the upper surface of the throat plate. A differential upper feed device for a flatbed sewing machine, which is characterized in that the interval from the upper 1ffJ to the surface light of the rear feed dog is adjusted. 10. The arm shaft of the interlock stitch sewing machine is equipped with a back-and-forth swing arm and a vertical swing arm on the existing upper feed shaft that can swing freely through an eccentric wheel. Upper front and rear feed dog that can freely adjust the upper and rearward swing motions. Upper front and rear feed dog is connected to the front and back movement axis through a back and forth swing amount adjustment device, and the upper front and rear feed dogs are fixed to the tips of each. The table and the longitudinal movement axis are connected through the upper front feed dog longitudinal swing amount A node device, the upper rear feed dog longitudinal movement cutting upper and the upper longitudinal feed both longitudinal movement connecting rods, and the vertical movement swing arm and It is connected to the upper front and rear feed dog mounting base through an upper front and rear feed dog upper and rear feed dog mount adjustment device that can freely adjust the rocking movement of the stack, and the feed amount of the upper front and rear feed dogs can be adjusted by adjusting the feed amount of the upper front and rear feed dogs. The upper and lower ends of the upper and lower ends of the upper and lower ends of the upper feed dog elevating arms abut on the upper and lower ends of the upper and lower feed dog elevating arms, respectively. An interlock stitch sewing machine characterized in that the lower upper limit of the upper feed dog can be adjusted by inserting and lowering an upper feed south lower limit position adjusting screw and an upper feed upper limit position adjusting screw and rotating the screws respectively. Differential top feeder. 11, 11ii The rotation of the arm shaft of the 11ifl sewing machine is completely eccentric, and the existing upper feed shaft is equipped with a back-and-forth movement 11 force swinging arm and a vertical movement swinging arm, Forward and backward luck 11i! + Rocking UdJ Arm and stacking rocking movement 1lilJ Full adjustment Whitening Top front and back feed dog Back and forth swing amount adjustment device: Connect the front and back movement axis via a The number of upper front and rear feed dogs fixed to the tips of the upper and rear feed dogs and the front and back movement axis are respectively set to the upper and rear feed both front and back swings.
Tsuji adjustment device, upper and rear feed dog front and rear movement upper and rear feeders are connected via a connecting rod for both front and rear movements, and on the other hand, the upper and rear feed dogs are capable of freely adjusting the vertical movement of the swing arm and the rocking movement of the stack. Valve the stop rocking rat adjustment device and connect the upper and rear feed dog number inclination table;
The feed rate of the upper front feed dog can be freely adjusted by the feed pawl of the upper and rear feed dogs, enabling differential operation, and the presser foot lifts the presser foot connected to the presser foot lifting pedal via a chain. A connecting ring is interposed between the tip of a known movement direction changing arm whose base end is connected to the tip of the raising arm via a connecting rod and the tip of the upper feed dog lifting arm, and by stepping on the presser foot lifting pedal, the presser foot can be moved. A differential L feed device for an interlock stitch sewing machine, characterized in that the upper front and rear feed dogs are raised at the same time.