TW200306370A - Presser foot of sewing machine - Google Patents

Abstract

Disclosed is a presser foot of a sewing machine, that is rockingly installed to an auxiliary presser on a pin of a primary presser having a needle location at one of the two sides extending along a width direction of the primary presser. A pressing spring mounted between pressing bolts pushes a rear section of the auxiliary presser downwards, such that the presser foot ascends/descends based on the thickness, hardness and slidability of the cloth to resist against the pushing force of the pushing spring, whereby the force at the vicinity of the needle location of the primary presser balances the force applied by the auxiliary presser to the cuffed portion of the cloth, to ensure easy and smooth sewing operation under all sewing conditions.

Description

200306370 V. Description of the invention (1) The technical field to which the invention belongs The present invention relates to a presser foot of a sewing machine, which is assembled on a sewing machine and holds a cloth (Sewing Cloth) on a machine bed (Machine Bed ) On the needle plate (Stitch Plate), in more detail, there is a presser foot of a sewing machine. Auxiliary pressure parts. Previously, from the inside to the dial and the clamped dynamic presser foot, for example, in the sewing of T-shirts, the sewing on the fabric side of the target side is carried out, and the sewing machine is fed to the fabric on the surface side. The cloth on the needle board is continuously conveyed, so that the width of the dislocation increases. The waist and cuffs are designed in the shape of a cylindrical part, and the edge crosses a predetermined width, and is folded back to the needle drop position. Seam the folded back edge (Hemming Opera). Generally speaking, by setting the needle presser on the sewing machine table to the front, back, and left and right of the f needle position, to break each end # = tooth feed shovel inside the knife table. T: $ 之 折 cle 'above The cloth taking part includes the above-mentioned folded-back part in a sewing machine with a clamping width of foldable. The cloth of the feather extends to the left and right sides of the needle drop position. A suitable roll is provided. The upper part of the needle plate is arranged in parallel with the main pressure. The width of the piece is ^ and the auxiliary pressing piece of the turning part of the main pressing material is lost, and on both sides, the above-mentioned cloth presser foot is lost. Large width of the fabric misfit

2U03UW / U V. Conventional description of the invention (2) The cutting and sewing machine does not include the large-width presser foot including the main presser and the auxiliary presser. The dot lock lines in the figure indicate that the left, right and right sides have:; = position presser foot 2 includes the width direction of left 20 above the needle drop position: 7 of the main drop piece 20 ′ and the side of the main pressure piece sewing machine β The auxiliary pressure member 21 on the upper right side is used for misalignment. The work of the cloth W to be sewn between the needle boards 3 on the front surface is performed by the folded-back portion X. The cloth is shaken the most. ^ The vicinity of the side edge E is folded back to a predetermined width, and sewing is performed therebetween. At this time, the auxiliary pressing member 21 clamps the protruding folded-back portion X in a state of being folded back to the outside of the needle plate 3 =: 20 as shown in the figure, and enters the private A to defend, and holds the folded-back portion X at π π: Enter the needle position and make sure pleating. However, compared to the auxiliary pressing member 21 with a full turn-back portion X, the main pressing member 20 is injured u Μ # and the cloth W is overlapped with two pieces of M.. Wang & Toyoshi cloth. Since about one + see the degree of cloth left by the pressure piece 20 and the auxiliary piece 21, the cloth around the main needle drop position, and the main dust piece 20 (not shown) The conveying force is given by the action shown in the figure. The conveying force is provided by the auxiliary pressure member 21, which is not stored in the position below the folded-back portion X disposed on the lower part of the needle plate 3. Therefore, with the helmet method α, it is impossible to directly. _ ^ There is no other way to stably transport the cloth bow w. In order to solve this problem, as shown in Fig. I, the pressing face of W 21 is more than the pressing force of the main pressing member 20 / the auxiliary pressing force of the needle plate 3 is greater than the dust force generated by the main pressing member 20: = auxiliary The force balance of the pressure of the pressure piece 21 generated by the pressure piece 21 is adapted to the pressure of the chalk piece 20 and the auxiliary pressure field. However, due to the pressure of the main pressure piece 20 $ 7 2098-5597PF (ND Ptd 200306370 V. Description of the invention (3) The proper force balance of the pressure of the pressure auxiliary pressure piece 21, the thickness, hardness and ease of sliding of the material W The change θ ^ should be stable under the condition of the sewing target fabric, and it is difficult to convey the fabric and perform it in various sewing-part sewing machines, compared to the main pressure of 22, 5 and 5. It is difficult to prepare different auxiliary pressure pieces. 2 丨, and the difference between the height of the face and the hair surface, quasi-choose 'use the presser foot that can be replaced by the father. However, it is difficult to choose the auxiliary presser that is conditional on the conditions of ^ w ,,, and'. For various pieces 21, there is a problem of frequently forcing I to change the loading and unloading operation of the selected auxiliary pressure 1 ^. SUMMARY OF THE INVENTION In view of the above-mentioned problems, the present invention is based on the folding back of the auxiliary pressure member. The presser foot of the sewing machine, the force of the cloth pressure near the position ^ The pressure of the cloth is equivalent to the needle drop of the main pressure piece. In all kinds of sewing 侔 = 1, it can be used without any sewing conditions. Good pleats. Access to the sewing machine table The presser foot of the inclined f machine has a main presser, which will send the appropriate width on both sides of the thin position of the fabric: the main presser width direction ~; then = between the board and the auxiliary presser, which is set on the auxiliary presser The piece can be lifted up and down to the folded-back part of the fabric. The auxiliary pressing piece pushes down the main pressing piece of the pushing device, and has a safety event in the present invention, which is relatively The width of the auxiliary pressure on one side increases and decreases. The material lost between the needle plates is raised and lowered against the pressure of the pushing device. The pressure near the needle position is flat: The pressure 'makes it fall with the main pressure piece. Li Qian The balance is appropriate, and the cloth 2098-5597PF (Nl) vid 200306370 including the folded-back part is stabilized. 5. The invention description (4) The material conveying is stabilized, and a good crease is achieved regardless of the sewing conditions. In the presser foot of the sewing machine, the auxiliary presser of the first invention is pivotably pivoted to rotate along an axis in the width direction of the edge of the main presser. The pressing device is provided with a presser spring, and will be rotated by the rotation of the shaft. The rear part of the auxiliary pressing member that is raised and lowered is pressed downward. In the middle, along the front edge of the main pressing member, the shaft extending in the width direction is pivotably mounted on the front portion of the auxiliary pressing member, and presses the spring force of the spring on the rear portion of the auxiliary pressing member which moves up and down with the shaking. Press down to easily install the auxiliary pressure piece that can be raised and lowered. The presser foot of the sewing machine of the third invention has an adjusting device that adjusts the elasticity of the pressing spring in the second invention. In the present invention, by adjusting the pressing assistance, The elastic force of the pressing spring of the pressing member can only stabilize the conveying of the fabric and perform a good crease only when the relatively difficult sewing conditions during auxiliary pressing of the pressing member are changed. There is also a sewing foot of the fourth invention, which The auxiliary pressing member according to the second invention or the third invention is detachable from the main pressing member by being pulled out in the axial direction of the shaft. In the present invention, the auxiliary pressure piece is detached autonomously by the release of the shaft. For example, the auxiliary pressure piece can be applied to various sewings other than using only the crease of the main pressure piece, and can also be applied to exchange by the auxiliary pressure piece. Make large folds of folds. As a new feature for the purpose of the present invention, it will be fully understood by reading the following detailed description and the accompanying drawings.

2098-5597PF (Nl) ptd Page 9 200306370 V. Description of the Invention (5) Embodiments The present invention will be described in detail below with reference to the drawings showing the preferred embodiments. Figure 2 is a perspective view of the structure of a main part of a sewing and trowel machine having a presser foot according to the present invention. The sewing machine shown is a two-needle flat-lock sewing machine (2 Needles

Covering Chain Stich Machine), Presser Bar 10 and Needle Bar 40 hang down from the front end of the sewing machine arm a, a presser foot i is attached to the lower end of the presser bar 10, and a lower end of the needle bar 40 Two needles 4, 4 are mounted through a Needle Clamp 41. A needle plate 3 is mounted on the front end of the sewing machine located below the sewing machine arm A. The lower part of the throat plate 3 includes a bending wheel and a conveying mechanism (not shown). The cloth w inserted from the square on the mouth B is sandwiched between the needles and the needles by the haw of the needle bar 40 which is embedded in the seam (the above-mentioned Main Shaft), and the heart is glazed with Upper η, η and the needle ^ Phase "The needle drop hole (not shown) provided inside the sewing machine table B through the needle drop hole provided in the pressure chat 1 moves up and down during the stroke of H. Fig. 3 is a perspective view of the appearance of the taxi 1 on the sewing machine mounted on 矣-# ~ on the sewing machine shown in Fig. 2. Fan 4 is the same as the press of the present invention. Fig. 4 is a perspective view of a sewing machine assembled on the presser 1 of the present invention shown in the figure. Figure 3 and the flute / ^ are the ^ j figure viewed from the opposite side (right side) of any mouth of Figure 4 coincident with Figure 2. % ≪ stereo

The presser foot 1 shown in Figures 3 and 4 has

2098-5597PF (Nl) ptd Page 10 200306370 V. Description of the invention (6) Needle drop hole 1 at the needle drop position 4 and 4 1 A plate-shaped main pressure piece on the left and right sides with a predetermined width 1 2 To the auxiliary pressure piece 13 installed on the right side of the main pressure piece. Behind the main pressing member 12, a fixed bracket 14 is erected at a position slightly in the center in the width direction. The presser foot 1 is inserted into the lower end of the presser rod 10 above the fixed bracket 14 described above. The presser foot 1 is held by the connection of the fixed bolt 14a. The upper and lower sides of the main presser 2 and the auxiliary presser 13 and the presser rod 10 are omitted. Installed at right angles. In the state shown in FIG. 2, the front portion of the main pressing member 12 can store the cloth w between the needle plate 3 and bend it upward. Therefore, the right side of the leading edge of the main pressing member 12 is integrally formed with the block-shaped front mounting seat 15 for installing the auxiliary pressing member 13. The rear part of the main pressure member 12 is formed with a thick wall on the right side of the standing portion of the fixed bracket 14 and a rear mounting seat 16 is provided. The pressure assisting element 13 is the same as the main pressure assisting element 2 in that the front portion of the pressure assisting element 1 is curved and thin. The front portion of the pressure assisting element 1 has a shape of 2 7 + Γι f extending along the edge width direction. It also assists the rear part of the pressing member 13 with: The pressing flange 18 protruding on one side (left side) is integrally formed. The pressure-assisting parts 1 and 3 are the same as those in Section 4-Guangdianfeng Office, and will pass through the pivot support two; V: the pivot support hole on the right side of the main pressure support 12 ..., ^ two support two pins 19 are inserted into the opening in front Ann】 The stop screw and pick of the hole 15b; the auxiliary pressure piece that is opened in the front mounting base 15 3 ± stops the above-mentioned support pin 19 and moves up and down. The supporting pin 19 is pivoted as an axis, and the auxiliary pressing member 13 is attached to the rear mounting seat 16 of the rear part 4 and the flange 18 is installed on: The door of the pressing bolt 16a is as shown in FIG. 3 It is shown that it is pressed downward by a pressing spring 16b provided in the rear section. Such as;

It is supplemented by a flat plate, a cylindrical shape, and a direction on the side, which determines the position of the seat. In this way, the rear part is set at the rear of the pressing piece 12 and the mounting seat 16

2098-5597PF (Nl) ptd Page 11

200306370 V. Description of the invention (7) 4 The pressing flange 18 shown in the figure is formed with a pressing hole 18a penetrating the front and rear surfaces, and on the rear mounting seat 16, a screw hole 16c is formed corresponding to the pressing hole 18a. s position. The pressing bolt 16a is screwed into the screw hole 16c of the mounting base 16 through the pressing hole 18a of the pressing flange 18, and the ends of the spring 16b of the coil spring are elastically connected to the head and pressing of the pressing bolt 16a. The peripheral edge portion of the hole 18 a. The rear portion of the auxiliary pressing member 13 constructed as described above is capable of resisting the pressing force of the pressing spring 16b to be raised and lowered by swinging with the support pin 19 as a pivot. 2 The degree of elevation can be changed by adjusting the amount of screwing of the pressing bolt 16a to increase and decrease the elastic force of the yellow 16b. And the pressure that pushes the auxiliary pressing member 13 downward

= Spring 16b is not limited to the coil spring shown in the figure, but other springs such as plate springs can also be used, and the compression spring 16b can be changed and the rubber two push device can be used. Yu Ping | Cong As the auxiliary pressure piece 1 3 as above, the abutment of the above-mentioned support pin 19 is released by loosening the above-mentioned stop bolt j 5, and together with the support pin 9 to the right: it can be automatically pressed The piece 12 can be taken out, and it can also be installed in reverse order. Here ^ The pressing hole of the pressing flange 18 at the rear of the auxiliary M piece 13 is the same as the first one * I: Master? The opposite edges of the pieces 12 extend beyond the appropriate width of the gap. Second, it is not necessary to take out the above-mentioned pressing bolts by using the notched portion ... to install and remove the auxiliary pressure piece 13 by 16b. $

Yu Zhuangye 5-2 5β is a front view of a zigzag of a tailor with a presser foot 1 as described above. The single-point lock line in the figure indicates the position of two m points side by side. & The fabric to be sewn is also indicated by.,-in the second figure. The line near the side edge E extends over a predetermined width and returns to the state where the folded-back portion X overlaps the inner side. , Clip two on top,

200306370 V. Description of the invention (8) _ Between the presser foot i and the needle plate, it is lowered between the above-mentioned needle drop operation and the production of the icon shown below the needle plate, and the movement between 4 and ff is issued. The main piece 12 of the foot 1 extends the predetermined width of the needle drop side to press the cloth W, and assists the 3 series of the folded-back portion X on the outer side of the press protrusion 1 2. μ person.. _ L Larger than the main pressure piece, the pressure balance Z 1 j 1 2 of the cloth W and the auxiliary pressure piece 13 are V / for hardness and ease of sliding. Corresponding to the thickness of the sewing object, the auxiliary presser foot 1 of the presser foot 1 of the present invention is buried by a support pin of ± 4dt 1 9 as the pivot pinch 4 2 You are wrongly raised and lowered by supporting the front part . # 1;: ^: The pressure of the auxiliary pressure piece 1 3 which resists the pressing of the bullets and the main U: 2:: x will change. Figure 5 A shows the thin cloth f4w and the force. Force balance will be appropriate.

Sewing state. The sewing state of trembling w '㈣ shows the thick cloth W. 5 A shows the two pieces pressed by the pu piece overlapping: two is medium'. The pressure difference between the auxiliary pressure and the main pressure piece 12 is 4 / Specially, the elastic force of the pressure of the auxiliary pressure piece 13 is pushed down and lowered. At this time, the auxiliary pressure piece 13 is held by the pressure bomb 6b. Under appropriate conditions, the pressure of the pressure piece 12 is maintained in a balanced manner. In contrast to the above, the function of the folded-back portion X of the fifth frame is described. The pressure of the creasing crimping member 13 for the thick cloth w as shown by the auxiliary crimping member and the main crimping member 72, the folded back portion X is thicker, and the auxiliary portion is added by the self-returning portion X. 1 Chali is big. At this time, the auxiliary pressure piece 丨 3 rises by the elastic force. By this action, the pressure of the main pressure piece 12 against the compression spring 16b is reduced. The pressure at the folded-back portion X is reduced, so that the balance of the bathroom force is appropriately adjusted. . 2098-5597PF (Nl) ptd Page 13 200306370 V. Description of the invention (9) Thus, the presser foot 1 of the present invention has an auxiliary presser 3, which corresponds to the position of the folded-back portion X held between the needle plates 3. The pressure is raised and lowered by the counter force, and the pressure of the lifting assist pressure 13 is increased or decreased, so that the force balance with the pressure of the main pressing member 12 is appropriately adjusted. The sewing conditions such as the thickness and hardness of the fabric W are extended beyond the presser foot. The full width of 1 is obtained, and an appropriate pressing state is obtained, and a good crease can be reliably performed. In addition, the pressure of the auxiliary pressing member 3 can be easily adjusted by operating the pressing bolt 16a to increase the spring force of the decompressing spring 6b. In addition, the auxiliary pressure piece shown in the above-mentioned application form 3 is oscillated by the support pin 19 along the edge of the main pressure piece i 2 to resist the elastic force of the pressure spring 16 b to make the rear 4 liters. IV, for example, press and hold springs in the front and back, resist the push and lift the whole, etc., # can make auxiliary press workers by other structures

Qiu's * surname f is shown in the above embodiment. The auxiliary pressure piece 13 can be attached to and detached from the main pressure piece 12 by supporting the removal and insertion of the front pin 19. In the case of creases with different degrees of visibility during loading and unloading, for the purpose of exchanging the shape of the crease; = another auxiliary pressure piece 1 3, and there is an auxiliary pressure piece for taking out the unused heart. 13. The flat quilting application mode is for a flat seam with two needles with two needles 4'4. The presser foot 1 of the present invention can also be applied to a machine with three machines. ,,,, ',,,,, and knives can also be used to press the fabric on the sewing side other than the flat seam. On the one side in the width direction, an auxiliary pressing member can be installed to be lifted and lowered against the main pressing member against the pressing device. Since by

zuujuoj / υ 5. Description of the invention (10) ___ The auxiliary pressure piece presses the structure of the folded-back part, and the piece is raised and lowered, which can maintain the pressure of the main pressure folded-back part. It can be released according to the conditions of the auxiliary pressure sewing 16 The force of the house force is properly balanced, regardless of the second invention, "::, made. Shake pivotally on the front of the auxiliary pressure piece, the axis of the main pressure piece can be lifted, and the auxiliary pressure can be lifted. The spring force of the rear part of the piece is pressed with the rocking movement, and therefore, each A is simply pushed down relative to the main pressure piece to form a downwardly pressing structure. The second invention is to implement the auxiliary pressure piece that can be raised and lowered. In the sewing machine presser foot, adjust the 'auxiliary cymbals' and the main house parts to the fabric =: The elastic force of the pressing spring can be appropriately adjusted, and a good crease can be stably implemented. The sewing machine pressure of the invention can be detached by the self-pressing parts, so it is preferable: = the pressure-assisting part is installed outside the creases without auxiliary fort; The width of the part is more than that of Yuge ~ Ming, which has excellent effects. Mingzhiji Erji ::: Block :: The implementation mode is intended to make a narrow interpretation, which can be implemented in: the essence of the invention; ..., and various changes and implementation within the scope of the system. A and the description in the application Patent range 2098-5597PF (* sl) Pld Page 15 200306370 Brief description of the drawing Figure 1 shows the front view of the state of implementation of a sewing machine with a conventional presser foot. Fig. 2 shows the presser foot with the invention A perspective view of the structure of the main part of the sewing machine. Fig. 3 is a perspective view of the appearance of the presser foot of the present invention. Fig. 4 is an exploded perspective view of the presser foot of the present invention. Figs. 5 A and 5 B are views of a sewing machine provided with the presser foot of the present invention. Front view of the state of implementation of the crease. _ Symbol description 1 ~ Presser foot; 2 ~ Conventional presser foot; 3 ~ Needle plate; 4 ~ Needle; 10 ~ Presser bar; 1 1 ~ Needle drop hole; 1 2 ~ Main Pressure piece; 1 3 ~ auxiliary pressure piece; 1 4 ~ fixing bracket; 14a ~ fixing bolt; 15 ~ front mounting seat; 15a ~ pivot support hole; 15b ~ screw hole; 15c ~ stop bolt; 16 ~ rear mounting seat 16a ~ press screw inspection; 16b ~ press spring; 16c ~ thread hole; 17 ~ cylindrical pivot tube; 18 ~ press Edge; 1 8 a ~ pressing hole; 19 ~ support pin; 2 0 ~ known main pressure piece; 2 1 ~ known auxiliary pressure piece; B ~ sewing machine; E ~ edge; W ~ cloth ; X ~ folded back; 4 0 ~ needle bar; 4 1 ~ needle clamp. _

2098-5597PF (Nl) ptd case 16 pages

Claims (1)

200306370 6. Scope of patent application 1. A main pressure over the needle drop position and the above-mentioned special features of the fabric, with 2 · If the above-mentioned auxiliary shaft is rotated by the above-mentioned shaft 3. If it further includes adjustment 4 · Such as the above-mentioned auxiliary The presser foot of the above-mentioned main sewing machine includes: a piece of cloth that is fed to a needle plate provided on the sewing machine table and is clamped between the two sides of the horizontal plate with an appropriate width; The side pressing part and the turning-back part are as follows: The auxiliary part can make the application special pressing part available, and the application device for turning upwards can apply for the special pressing part. The pressing part can be lifted up and down from the width direction of the main pressing part. The pressing device is installed on the main pressing member and the auxiliary pressing member. The presser foot of the sewing machine according to the first item, wherein the pressing device is pivotally pivoted so that the pressing device has a pressing spring in the width direction of the front edge of the main pressing member, and presses down the auxiliary pressure that is raised and lowered by shaking. Rear of the pieces. The presser foot of the sewing machine as described in the second item, wherein, is used to adjust the elasticity of the pressurized bomb. The presser foot of the sewing machine as described in item 2 or 3 is installed so as to be detachable from the axis direction of the above-mentioned shaft. 2098-5597PF (Nl) ptd Page 17