KR20080063068A - Presser foot of sewing machine - Google Patents

Abstract

A presser foot of a sewing machine is provided to install a subsidiary guiding member protruded into a guide passage between the presser feet to another presser foot. A presser includes a presser body(11). A needle falling position(14) is installed at about center of the presser body. Two presser feet(12,13) are installed at the front of the presser body, located in parallel to each other and extended forwardly. The presser body includes a support member(11a) protruded to the rear thereof. An insertion hole(11b) is formed at the top end of the support member and has an opening and is inserted into the lower end of a presser bar(10) so that the presser body is supported at the lower end of a sewing machine arm. Sliding plates(12a,13a) are installed at the lower surfaces of the presser feet and leaf springs with a sled shape and fixed at the front end of the presser feet by stop screws(12b,13b). A subsidiary presser(9) is installed between the sliding plates, at the lower portion of the presser body and behind the needle falling position. A fixing mes(16) with a plate shape is supported by a support hole of a presser foot. A movable mes(17) is supported by a support hole of another presser foot.

Description

Presser of sewing machine {PRESSER FOOT OF SEWING MACHINE}

The present invention relates to a pusher of a sewing machine for performing a butt sewing in which two stages of fabric are overlapped and sewn.

Butt stitching is a type of stitch used when stitching the crotch bottom of briefs and shorts, and is performed using a sewing machine having a small cylindrical bed. . This sewing machine is provided with a stitch plate provided on the upper end of the cylindrical bed, and a presser foot which is located above the needle plate and which is lifted by manual or automatic. The above-mentioned butt stitching overlaps two pieces of cloth from each end up and down over a predetermined width, is sandwiched between the lowered press and the needle plate, and sent to the needle drop position, by the needle descending to this needle drop position. It is done in the order of stitching and facing each other.

In order to obtain a high quality sewing product by such butt sewing, it is important that the overlap width of the fabric sent to the needle drop position is maintained at an appropriate width corresponding to the sewing width of the sewing machine. Although the overlap width of the cloth is generally adjusted by the operator's manual work at the front position of the tab, there is a problem that this adjustment requires skill.

 For the purpose of solving this problem, Japanese Utility Model Publication No. 59-34457 (Examined Japanese Utility Model Publication No. 59-34457 (1984)) is provided with a special stopper and requires an operator to adjust the overlap width. A sewing machine is disclosed. The presser of this sewing machine is provided with the knife which cuts the edge of the cloth used as the object to be sewed, and the guide member which guides the cut | laminated fabric, and overlaps up and down.

BRIEF DESCRIPTION OF THE DRAWINGS The perspective view of the needle drop position vicinity of the sewing machine equipped with the conventional stopper provided with a scalpel and a guide member. As shown in the figure, the presser 1 includes a pressing main body 11 and two pressing feet 12 and 13. The pressing main body 11 is attached to the lower end of the pressing rod 10 supported by the front end of the sewing machine arm 2, and the two pressing feet 12 and 13 are both right and left sides of the front part of the pressing main body 11; In parallel with each other and extending forward. The presser 1 is lowered by the downward movement of the press bar 10 and is pushed onto the needle plate 4 on the sewing machine head 3.

The left and right push feet 12 and 13 form a guide passage 15 that opens at the front end. In the middle part of the guide passage 15, a fixed knife 16 fixed to the pusher foot 12 and a movable knife provided on the pusher foot 13 to allow movement in the left and right directions. (17) is arranged. An upper guide 18 is provided at the rear position of the fixed scalpel 16 and the movable scalpel 17 so as to cross between the upper surfaces of the left and right push feet 12 and 13. In the lower position of 18, a lower guide 19 is provided so as to protrude into the guide passage 15 along the lower surface of the presser foot 12 (see Figs. 2B and 2C).

      The lower fabric KL and the upper fabric KU which are sewed to each other are raised in the guide passage 15 in a state where the respective stages are aligned with each other, as shown in FIG. 1, and the left and right foots 12 and 13 are respectively. ) Is set to be supported between the needle plate (4). In this state, the lower cloth KL and the upper cloth KU are sent to the lower part of the pressing main body 11 by applying transportation to the direction indicated by the arrow in FIG. 1, and the needle drop position of the center of the pressing main body 11 ( The needles 5, 5, ... descending to 14) sew on each other to face each other.

The lower fabric KL and the upper ends of the upper fabric KU are cut by the action of the intermediate fixed scalpel 16 and the movable scalpel 17 of the guide passage 15, and the cut down fabric KL and The stage of the upper fabric KU is piled up and down by the action of the upper guide 18 and the lower guide 19, and is sent to the needle drop position 14.

2A to 2E are explanatory views of the operation of the pusher, and a cross section of the pusher 1 in a direction orthogonal to the transport direction of the lower cloth KL and the upper cloth KU is shown. Fig. 2A shows a cross section near the front end of the stopper 1, Fig. 2B shows a cross section of the cutting position by the fixed scalpel 16 and the movable scalpel 17, and Figs. The cross section between the needle drop positions 14 is shown, and FIG. 2E has shown the cross section of the needle drop positions 14.

      As shown in Fig. 2C and 2D, the upper guide 18 has an arched lower surface where the presser foot 12 is high and the presser foot 13 has a low arc shape, and the needle falls by increasing the thickness toward the rearward direction. It is provided so that it may continue to the lower surface of the press main body 11 in the front position of the position 14. The lower guide 19 is a plate fixed to the lower surface of the presser foot 12, and is guided from immediately after the position where the fixed blade 16 and the movable blade 17 are placed, as shown in Figs. 2B and 2C. It protrudes into the passage 15 and has a guide edge extending the protruding length toward the rearward direction.

      The lower fabric KL and the upper fabric KU overlap each other with a proper width from each end, as shown in Fig. 2A, and introduce the butted portion into the guide passage 15 in a state where the butt is placed on the needle plate 4. do. In order to facilitate the introduction, as shown by the dashed-dotted line in Fig. 2A, it rises to the upper surface of the needle plate 4 to hold the overlapping portions of the lower fabric KL and the upper fabric KU in the standing state. The auxiliary plate P may be used.

The lower fabric KL and the upper fabric KU introduced in this way reach the excretion positions of the fixed scalpel 16 and the movable scalpel 17, as shown in FIG. Is sent. During this transport, the lower fabric KL sandwiched by the left foot 12 is supported by the guide edge of the lower guide 19 projecting into the guide passage 15, as shown in Figs. 2C and 2D. It is pushed away from the left side and falls over the needle plate 4. The upper fabric KU inserted and supported by the right foot 13 is guided by the upper guide 18 curved in an arc shape, and falls over the lower guide 19 positioned at the lower portion thereof. After reaching the rear end of 19), the upper part of the lower fabric KL above the needle plate 4 is overlapped. The lower fabric KL and the upper fabric KU superimposed on each other are sent to the needle dropping position 14 as shown in FIG. 2E and sewed by the needles 5, 5... Which descend to the needle dropping position 14. It is face to face.

 In this way, the lower fabric KL and the upper fabric KU cut off the stage by the operation of the fixed scalpel 16 and the movable scalpel 17, and by the action of the upper guide 18 and the lower guide 19. The upper and lower sides are aligned and sent to the needle drop position 14, so that it is possible to realize butt stitching of the lower fabric KL and the upper fabric KU with a substantially constant overlapping width. At this time, the worker only needs to superimpose the edge | side of the lower cloth KL and the upper cloth KU suitably, and sends it to the presser 1 in the state which stood up on the needle plate 4, and does not require skill.

   In order to perform the above butt stitching satisfactorily, it is necessary to cut | disconnect the stage of the lower cloth KL and the upper cloth KU correctly by the operation of the fixed scalpel 16 and the movable scalpel 17. The fixed scalpel 16 and the movable scalpel 17 act on the upper ends of the lower fabric KL and the upper fabric KU to rise to the upper surface of the needle plate 4, so that the lower fabric ( It is important to stabilize the standing posture of the KL) and the upper fabric KU.

The upright posture of the lower fabric KL and the upper fabric KU on the needle plate 4 is maintained by the action of the inner surfaces (opposed surfaces of the guide passage 15) of the presser feet 12 and 13. Therefore, in order to maintain a stable standing posture, the passage width of the guide passage 15 between the push feet 12 and 13 at the position before the fixed scalpel 16 and the movable scalpel 17 is reduced. ) (See FIG. 2A).

However, since the appropriate value of the passage width of the guide passage 15 depends on the thickness of the lower fabric KL and the upper fabric KU to be sewn, for example, the thick lower fabric KL and In the case of using a stopper 1 having a passage width suitable for the upper fabric KU, the thin lower fabric KL and the upper fabric KU, in particular, the thin and soft lower fabric KL and the upper fabric KU , The lower cloth KL and the upper cloth KU are bent in the guide passage 15 wider than the proper width, and the stage cut out by the operation of the fixed blade 16 and the movable blade 17 is It may wave, and as shown in FIG. 3, there exists a possibility that the poor sewing goods which the wave part A remained at the edge of the upper fabric KU may be obtained.

On the contrary, when using a tab (1) having a passage width (아래) suitable for the thin lower fabric (KL) and the upper fabric (KU), the appropriate width when sewing the thick lower fabric (KL) and the upper fabric (KU) In the narrower guide passage 15, the transportation of the lower fabric KL and the upper fabric KU is impeded, and there is a risk of disturbing sewing. Due to such circumstances, in the related art, the presser 1 is appropriately replaced according to the thickness of the fabric to be sewn, so that the presser 1 is used at the sewing site where a thin cloth and a thick cloth are mixed. It takes a lot of time to exchange, and there is a problem that the work efficiency is reduced.

In addition, when handling the cloth whose thickness changes in the advancing direction of stitching, it is impossible to respond by replacing the presser 1, and it is difficult to obtain a high quality sewing product.

The present invention has been devised in view of the above circumstances, and by adding a simple part, it is possible to satisfactorily cut the upper and lower ends of the fabric irrespective of the type of the target fabric, and to reduce the amount of cut-off. It is an object of the present invention to provide a presser of a sewing machine that can effectively prevent the occurrence of sewing defects according to the present invention.

 The presser of the sewing machine of the 1st invention of this invention is located in the left and right both sides of a needle drop position, and is arrange | positioned in the middle of the guide path formed between two press feet which are substantially parallel and mutually extend forward, and these press feet. An upper fabric and a lower fabric supported between each of the two pressing feet and the needle plate, and introduced into the guide passage with each end portion standing up on the needle plate; In the presser of the sewing machine which cuts an end, and overlaps up and down, and sends it to the said needle drop position, it is provided in the position before the said scalpel of the presser foot which clamps the said upper cloth, and is located inside of the said guide passage. It characterized in that it comprises an auxiliary guide member protruding.

      In the presser of the sewing machine of the second invention of the present invention, the auxiliary guide member in the first invention is provided so that the amount of protrusion into the guide passage can be changed by adjusting the position in the left and right directions. do.

      The presser of the sewing machine of the third invention of the present invention is characterized in that the auxiliary guide member in the second invention is provided by a set screw that can be operated from an upward direction of the presser foot. .

      As for the presser of the sewing machine of the 4th invention of this invention, the auxiliary guide member in any one of 1st-3rd invention is comprised so that elastic displacement of the width direction of the said guide channel | path is comprised possible. .

      The objects and novel features of these inventions will become more fully apparent upon reading the following detailed description with reference to the accompanying drawings.

As is clear from the above detailed description, in the presser of the sewing machine of the first invention of the present invention, the pressing foot for sandwiching the upper fabric is placed at the front position of the scalpel (fixed scalpel 16 and movable scalpel 17). Since the auxiliary guide member protruding into the guide passage is provided, the width of the guide passage between the other pressing foot is regulated, and the standing posture of the upper cloth KU and the lower cloth KL is It is possible to keep stable regardless of the kind of the cloth such as thick, thin, hard and soft, and it is possible to perform the cutting of the stage by a scalpel well, and the occurrence of the sewing defect accompanying the failure of the cutting Can be effectively prevented.

Moreover, in the presser of the sewing machine which concerns on 2nd invention, since the auxiliary guide member was provided so that the protrusion amount into the guide passage can be changed by the position adjustment of a left-right direction, for example, according to the type of cloth, It is possible to change the passage width, to maintain the standing postures of the upper and lower fabrics more stably, and to perform the cutting of the stage by the scalpel satisfactorily.

In addition, in the stopper of the sewing machine according to the third aspect of the invention, since the protrusion amount of the auxiliary guide member can be changed by an operation from the upward direction, it is easy to properly optimize the passage width according to the type of the cloth. It is possible.

      Furthermore, in the stopper of the sewing machine according to the fourth invention, since the auxiliary guide member is elastically displaced in the width direction of the guide passage, the displacement of the auxiliary guide member is also reduced even when handling a cloth whose thickness changes in the advancing direction of sewing. It is possible to cope by this, and it becomes possible to effectively prevent generation | occurrence | production of the sewing defect accompanying the defect of cut-off.

      As mentioned above, embodiment described in the column of detailed description of an invention is intended to make clear the technical content of this invention to the last, and this invention is limited to only such a specific example and is not interpreted by consultation. The present invention may be modified and implemented in various ways within the spirit and scope of the claims.

     EMBODIMENT OF THE INVENTION Hereinafter, this invention is explained in full detail based on drawing which shows preferable embodiment. 4 is an exploded perspective view of the presser of the sewing machine according to the present invention. The presser 1 which concerns on this invention is the press main body 11 in which the needle drop position 14 was provided in the substantially center, and is provided in the front part of this press main body 11, and is extended in parallel and mutually forward. Dog foot 12 and 13 are provided. The pressing main body 11 has a support angle 11a which rises to the rear part, and the insertion hole 11b which has an opening in the upper end of this support angle 11a. 4 is supported at the lower end of the sewing machine arm 2 as shown in FIG. 1 by inserting and fixing it at the lower end of the pressing rod 10 shown by the dashed-dotted line in FIG. .

 As shown in FIG. 1, this stopper 1 descends on the sewing machine head 3 together with the pressing rod 10, and on the upper surface of the needle plate 4 placed laterally on the sewing machine head 3, Push the main body (11) and the left and right push feet (12, 13) to use. On the lower surface of each presser foot 12 and 13, sliding plates 12a and 13a are provided. The sliding plates 12a and 13a are leaf springs formed in a sled shape and curved, and the connecting portions formed by bending the front and rear ends are provided at the front end of the foot 12 and 13 and the pressing main body 11. To the rear end of the presser foot (12, 13) and secured by the stop screws (12b, 13b) at the front end of the presser foot (12, 13). have.

      In the lower part of the press main body 11, the auxiliary press 9 is provided in the back of the needle drop position 14 so that it may be located between the sliding plates 12a and 13a. The auxiliary stopper 9 allows the supporting cylinder 90, which is integrally installed, to pass through the mounting hole (not shown) provided in the supporting angle 11a from below, and is supported inside the supporting cylinder 90. It presses downward by the coil spring 91 which became. Pushing of the press main body 11 and the right and left presser feet 12 and 13 to the needle plate 4 is actually caused by the auxiliary stopper 9 and the sliding plates 12a and 13a.

      In the intermediate part of the presser foot 12, 13, the support hole of a square cross section is provided so that it may penetrate in the width direction. The plate-shaped fixed scalpel 16 is fixedly supported by the support hole of the presser foot 12 of one side (left), and the movement to the left and right direction is supported by the support hole of the presser foot 13 of the other (right) side. The movable scalpel 17 is supported so that it is possible. As shown in Figs. 5 and 6, the fixed blade 16 has a proper length protruding into the guide passage 15 between the right foot 13 and an edge at this protruding end. Have Similarly, the movable blade 17 also has a proper length protruding into the guide passage 15, and has a blade overlapping the blade of the fixed blade 16 at the protruding end.

      The support hole of the presser foot 13 which supports the movable scalpel 17 extends to the front part, and the auxiliary guide member 6 is provided in the support groove 60 provided in this extension part. As shown in Fig. 4, the auxiliary guide member 6 is a member having an curved curved shape, and a rectangular fixing block 61 protruding from the curved surface to be inserted into the support groove 60 is provided to protrude. have.

      As shown by the arrow in FIG. 4, the auxiliary guide member 6 fits the fixing block 61 into the support groove 60 from the inner side of the presser foot 13, and opens to the upper surface of the presser foot 13. Fixing by passing the stop screw 62 from the circular hole to be closed and tightening it to the screw hole provided in the bottom surface of the support groove 60 via the long hole 63 provided in the fixing block 61. Doing.

      The long hole 63 of the fixing block 61 is lengthened left and right as shown in FIG. 4, and the fixing position of the auxiliary guide member 6 is in the length range of the long hole 63 by tightening the stop screw 62. FIG. It is possible to adjust from side to side. The stop screw 62 can be operated from the upward direction via a circular hole in the upper surface of the presser foot 13, and the position of the auxiliary guide member 6 is lowered at the lower end of the pusher 10. It is possible to easily adjust in the installed state.

      Moreover, the recessed part 70 is provided in the lower surface of the presser foot 13 over the suitable length in the back position of the support hole of the movable blade 17, and the contact member which forms a flat plate on this recessed part 70 is formed. (7) is inserted and fixed. The notch groove 71 which opens in the upper surface and outer surface of the presser foot 13, and extends in the left-right direction is provided in the upper part of the recessed part 70. As shown in FIG.

     As shown by the arrow in FIG. 4, the contact member 7 is inserted into the said recessed part 70 from the lower position, and the stop screw 72 which passed the long hole provided in the bottom face of the notch groove 71 is passed. ) Is fixed to the screw hole provided in the contact member 7.

      The long hole of the bottom face of the notch groove 71 is lengthened in the left-right direction, as shown in FIG. 4, and the fixed position of the contact member 7 is left-right direction within the length range of the said long hole by tightening the set screw 72. FIG. It is possible to adjust with. The stop screw 72 can be operated from an upward direction via an opening in the upper portion of the notch groove 71, and the position of the contact member 7 is provided at the lower end of the push rod 10 (1). It is possible to easily adjust in the use state which installed).

      On the lower surface of the presser foot 13 of the other side (right side), the lower guide 19 of the same form as before is provided. The lower guide 19 is a rectangular plate which is fastened to the lower surface of the presser foot 13 by the stop screw 80 and is fixed. The lower guide 19 has a guide edge protruding from the side of the guide passage 15 as described later.

      Moreover, the leaf spring 8 is provided in the lower surface of the presser foot 12. As shown in FIG. 4, the leaf spring 8 is connected to one edge of the square fixing piece 81 which overlaps with the lower guide 19, and is installed in the left-right direction substantially vertically from the connected edge. It has a curved shape which rises and lowers toward the other side from the upper end of this raised part, and has a curved shape which gradually lowers toward the rear part from the front part in the front-rear direction.

      The leaf spring 8 having such a shape is formed of, for example, a thin plate made of a metal material having sufficient elasticity, such as stainless steel for springs (SS340-CSP: VIS). It is integrally formed, and as shown in FIG. 4, the fixing piece 81 is superimposed on the upper part of the lower guide 19, and is pressed together with the lower guide 19 by tightening the said stop screw 80. As shown in FIG. It is fixed to the lower surface of the foot 13.

      FIG. 5 is a plan view from above showing the top of the pawl 1 according to the present invention. FIG. 6 is a bottom view (the plan view from below) of the pawl 1 according to the present invention. The planar positional relationship of the auxiliary guide member 6, the contact member 7, and the leaf spring 8 which were installed as shown is shown with the fixed blade 16 and the movable blade 17 shown by the dashed-dotted line in the figure. have. The movable scalpel 17 moves forward and backward in the left and right directions as indicated by the white arrows in FIGS. 5 and 6 by power transmission from a drive mechanism (not shown). By this retraction operation, the blade of the movable scalpel 17 comes into contact with the blade of the fixed scalpel 16 so that the upper fabric KU and the lower fabric KL introduced into the guide passage 15 as described later rise. Cut the right end.

      The auxiliary guide member 6 is provided in the inside of the front part of the right foot 13 on one side curved in an arched direction. The curved surface of the auxiliary guide member 6 is guided between the presser foot 12 from the front end of the presser foot 13 to the excrement position of the fixed scalpel 16 and the movable scalpel 17. It protrudes into the passage 15. The auxiliary guide member 6 is capable of position adjustment in the left and right directions, and it is possible to change the amount of protrusion of the guide passage 15 inwardly by this adjustment.

      As shown in FIG. 6, the contact member 7 provided on the lower surface of the presser foot 13 falls from the back of the position where the fixed scalpel 16 and the movable scalpel 17 are disposed on the pressing body 11. It is located between the positions 14. The edge portion of the contact member 7 inside the presser foot 13 protrudes into the guide passage 15 between the presser foot 12 and is positioned immediately before the needle drop position 14. .

      The lower guide 19 fixed to the lower surface of the presser foot 12 on the left side has a guide edge which protrudes inward of the guide passage 15 between the presser foot 13 as described above. As shown in FIG. 6, the protruding length of this guide edge becomes large toward the rear direction (downward in FIG.) From the lower position of the sliding part of the fixed blade 16 and the movable blade 17. As shown in FIG. have.

      The leaf spring 8 fixed to the presser foot 12 with the lower guide 19 positions a shear at the upper position of the sliding part of the blade of the fixed blade 16 and the movable blade 17, as shown in FIG. I'm making it. The rear end of the leaf spring 8 having the curved shape described above and extending in the rearward direction is positioned immediately before the needle drop position 14 provided in the pressing main body 11.

      As shown in FIG. 5, the upper guide 18 is provided in the upper part of the presser 1 as if it crosses between the left and right presser feet 12 and 13 at the back of the sliding part of the fixed blade 16 and the movable blade 17. FIG. It is installed. As described above, the upper portion of the leaf spring 8 provided on the pressing foot 12 is covered by the upper guide 18. On the upper surface of the upper guide 18, a guide groove 18a is formed obliquely from the front end and directed to the outer edge of the left side of the pressing main body 11 (the side of the pressing foot 12). have. The guide groove 18a serves as a guide for discharging the end of the fabric to be cut off by the fixed blade 16 and the movable blade 17 as described later.

      Butt stitching with the sewing machine provided with the stopper 1 comprised as mentioned above is similar to the conventional one, and the lower cloth KL and the upper cloth KU which are to be sewed are faced in the state which stood each end, and left and right It is introduced into the guide passage 15 between the presser feet 12 and 13, and the ends are cut at the sliding part of the fixed blade 16 and the movable blade 17, and overlapped up and down to the needle drop position 14. It is realized by sending.

      7A to 7E are diagrams illustrating the operation of the pusher of the sewing machine according to the present invention. This figure roughly shows the cross section of the presser 1 of the direction orthogonal to the conveyance direction of the lower cloth KL and the upper cloth KU similarly to the conventional operation | movement explanatory drawing (FIGS. 2A-2E). 7A shows the cross section of the front end of the stopper 1, FIG. 7B shows the cross section near the cutting position by the fixed scalpel 16 and the movable scalpel 17, and FIGS. 7C and 7D show the cutting position and the needle dropping position. The cross section between 14 is shown, and FIG. 7E has shown the cross section of the needle drop position 14. As shown in FIG.

      As shown in FIGS. 7C and 7D, the lower surface of the upper guide 18 has a higher side of the presser foot 12 for holding the lower fabric KL, and the lower side of the presser foot 13 for holding the upper fabric KU. The side has a low arc-shaped curved shape and increases in thickness toward the rearward direction, leading to the pre-position of the needle drop position 14. The curved shape described above of the leaf spring 8 provided on the pressing foot 12 corresponds to the shape of the lower surface of the upper guide 18. The leaf spring 8 is positioned so as to face the lower surface of the upper guide 18 at an appropriate interval as shown in FIGS. 7C and 7D.

      The lower fabric KL and the upper fabric KU which are sewed together are sandwiched and supported between each of the left and right push feet 12 and 13 and the needle plate 4 as shown in FIG. They overlap each other by the width, and are introduced into the guide passage 15 in a state in which the butt is placed on the needle plate 4. P in FIG. 7A is an auxiliary plate provided in order to hold the overlapped portions of the lower fabric KL and the upper fabric KU in a standing state.

      In the presser 1 which concerns on this invention, the auxiliary guide member 6 provided in the presser foot 13 which clamps the upper fabric KU protrudes to the front end part of the guide passage 15. As shown in FIG. The auxiliary guide member 6 faces the upper fabric KU rising from the needle plate 4, and is lowered by the other pressing foot 12 facing from the opposite side of the lower fabric KL. (KL) and the upper fabric (KU) acts to maintain a stable standing position on the needle plate (4).

      As described above, the amount of protrusion of the auxiliary guide member 6 can be increased or decreased by position adjustment in the left and right directions, and the guide passage through which the lower cloth KL and the upper cloth KU are introduced by the adjustment ( It is possible to appropriately change the passage width of 15). Therefore, by setting the appropriate passage width according to the type of fabric to be sewn together, the lower fabric KL and the upper fabric KU are not bound by thick, thin, hard and soft, respectively, It is possible to maintain a stable standing position.

      The auxiliary guide member 6 can be adjusted in position by the operation of the stop screw 62 from the upper portion of the presser foot 13, and handles various other lower fabrics KL and upper fabrics KU. In this case, it is possible to respond quickly. In addition, even in the case of handling the cloth whose thickness changes in the advancing direction of sewing, if the position of the auxiliary guide member 6 is set in anticipation of the change in thickness, the line of the other portion is not disturbed without impeding the passage of the thick portion. It is possible to keep the posture stable.

      The auxiliary guide member 6 may be a leaf spring having elasticity in the left and right direction, for example, and can be configured to enable elastic displacement of the guide passage 15 in the width direction. According to this structure, when handling the cloth whose thickness changes in the advancing direction of sewing mentioned above, it is possible to absorb the thickness change by bending the leaf spring in the change part of the thickness, and the lower cloth KL and the upper It is possible to keep the standing posture of the cloth KU even better.

      The lower fabric KL and the upper fabric KU introduced into the guide passage 15 in this way reach the excretion positions of the fixed scalpel 16 and the movable scalpel 17 as shown in FIG. 7B, and the upper end thereof. This is cut and fitted. Since the auxiliary guide member 6 extends immediately before the fixed scalpel 16 and the movable scalpel 17, the upper ends of the lower cloth KL and the upper cloth KU maintain a stable standing posture. Cut and fitted. Therefore, as shown in FIG. 3, it is possible to avoid the possibility that the bad stitch shape sewn on the lower fabric KL but abutted is left with the wave part A remaining at the end of the upper fabric KU.

      As described above, the front end of the leaf spring 8 is located at the rear upper portion of the fixed scalpel 16 and the movable scalpel 17, and at the bottom, the front portion of the lower guide 19 is located, and the fixed scalpel 16 is located. And the guide edge of the lower guide 19 is in contact with the lower portion of the lower fabric (KL) cut by the movable scalpel 17, the leaf spring (8) is in contact with the upper portion of the upper fabric (KU). In addition, the tip of the cloth cut by the fixed blade 16 and the movable blade 17 is guided and discharged to the guide groove 18a provided on the upper surface of the upper guide 18 as described above.

      The lower fabric KL and the upper fabric KU whose upper edges are cut off by the fixed scalpel 16 and the movable scalpel 17 are accompanied by transportation again, and the needle drop position (as shown in FIGS. 7C and 7D) 14). In the meantime, the lower fabric KL falls over the lower needle plate 4 from the left side by the guide edge of the lower guide 19 whose protruding length into the guide passage 15 increases.

      In addition, the upper fabric KU is pushed downward by the leaf spring 8 which contacts the upper part. The leaf spring 8 has a curved shape in which the presser foot 13 which supports the upper fabric KU is low, and becomes lower toward the back direction, and the upper fabric KU is the leaf spring 8 Under the action of, it falls down the milia lower guide 19 and overlaps the upper surface of the lower fabric KL at the transport position of FIG. 7D beyond the rear end of the lower guide 19.

The lower fabric KL and the upper fabric KU again accompany transportation, and reach the front position of the needle drop position 14 as shown in FIG. 7E. The lower guide 19 does not exist in this position, and the upper fabric KU directly overlaps the upper surface of the lower fabric KL. The contact member 7 provided in the lower surface of the presser foot 13 protrudes in the front position of the needle drop position 14. Since the protruding end of the contact member 7 presses the upper fabric KU toward the overlapping portion with the lower fabric KL, as shown in FIG. 7D, the upper fabric KU is the upper surface of the lower fabric KL. It overlaps without loosening, and it is sent to the needle drop position 14 in this state, and it is sewed together by the needles 5, 5 ... which descend to this needle drop position.

      1 is a perspective view of the vicinity of a needle drop position of a sewing machine equipped with a conventional pawl.

      2A to 2E are diagrams illustrating the operation of a conventional pusher.

      3 is a view showing a poor stitching form obtained when a conventional presser is used.

      4 is an exploded perspective view of the presser of the sewing machine according to the present invention.

      5 is a top view of the presser of the sewing machine according to the present invention.

      Fig. 6 is a bottom view of the presser of the sewing machine according to the present invention.

      7A to 7E are diagrams illustrating the operation of the pusher of the sewing machine according to the present invention.

Claims (4)

Located on both the left and right sides of the needle drop position, and having two pressing feet extending substantially forward and parallel to each other, and a scalpel disposed in the middle of the guide passage formed between the pressing feet, each of the two pressing feet The upper and lower fabrics sandwiched and supported between the needle plates are introduced into the guide passage with each end portion standing up on the needle plate, the ends are cut by the scalpel, and the needles are piled up and down to drop the needles. In the presser of the sewing machine to be sent to the position,       A presser of a sewing machine, characterized in that an auxiliary guide member is provided at a position before the scalpel of the presser foot for holding the upper fabric and protrudes inward of the guide passage. The method of claim 1,       The auxiliary guide member is provided with a sewing machine, characterized in that the protrusion amount into the guide passage can be changed by adjusting the position in the left and right directions. The method of claim 2,       Said auxiliary guide member is provided by the set screw which can be operated from the upward direction of the said presser foot, The sewing machine of the sewing machine characterized by the above-mentioned. The method according to claim 1, wherein The presser of the sewing machine is characterized in that the auxiliary guide member is configured to be capable of elastic displacement in the width direction of the guide passage.

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