JPH0556071U - Synchronous feed presser of the sewing machine - Google Patents

Abstract

(57) [Summary] (Corrected) "Purpose" The present invention is to provide a structure in which the sewing machine's synchronized feed presser has cloth feed performance as well as cloth feed performance. [Structure] A presser body having an attaching portion to be attached to a presser bar attached to the arm machine frame of the sewing machine, a presser foot pivotally attached to the presser body, and a feed supported by a spring in the presser body. A presser body, and an operating lever pivotally attached to the presser body,
A transmission lever pivotally attached to the presser body, one end of which abuts against the feed presser body and the other end of which engages with the actuating lever, and which is provided at the lower end of the feed presser body on the delivery side from the needle drop hole of the presser foot. The presser tooth portion is provided and the front end edge of the feed presser window provided in the presser foot is provided.

Description

[Detailed description of the device]

[0001]

[Industrial application]

 The present invention relates to a synchronized feed presser for a sewing machine.

[0002]

[Prior Art]

 As shown in JP-A-53-36344, a conventional synchronized feed presser for a sewing machine has a main body equipped with a mounting portion to be attached to a sewing machine presser bar and a presser foot for pressing a cloth, and is elastically attached to the main body via a spring. A feed presser body that has a feed presser part that is attracted to the end of the feed dog and is opposed to the top of the feed dog via a cloth, and an operating lever that is pivotally attached to the main body by the pivot shaft of the base end and one end of which is brought into contact with the needle stopper. And a lever, which is pivotally supported by the main body and has a pressing shoe mounted on one end, is mounted on the feed pressing body and the other end is brought into contact with a pin that is planted on the actuating lever. When the sewing machine is attached to the presser bar and the sewing machine is operated, the operating lever swings in conjunction with the vertical movement of the needle bar, and the presser foot of the main unit attached to the lower end of the presser bar rises and is slightly separated from the cloth. In this state, the feed clamp of the feed presser The feed movement of the feed dog to steamroller the cloth to the tooth are told to ensure the cloth. However, although the conventional sewing machine synchronized feed presser has a reliable cloth feed function, it cannot react sensitively to the cloth guide of the sewing person because of the poor turning performance of the cloth. For example, as shown in FIG. 4, sewing stitch points B1, B2, B3, and B4 sequentially advance in the direction of arrow B by cloth feeding, and even if the cloth W is bent in the XB direction just before B5 is sewn, the cloth W is fed by the feed dog. Since the position of the front end thread D of the feed presser part in front of the needle drop hole H is strongly clamped by F and the feed presser part 44, it cannot be bent, and it is in front of the position N before the needle drop hole H position. It will be bent at a position far away from the sewing point B4.

[0003]

[Problems to be solved by the device]

 The present invention is configured as an attachment type that can be attached to and detached from the lower end of the presser bar of the sewing machine.The synchronized feed presser has a reliable cloth feed performance, and at the same time has a high turning performance that responds sensitively to the cloth guide of the sewing person. The purpose is.

[0004]

[Means for Solving the Problems]

 The present invention comprises a main body attached to a sewing machine presser bar, a presser foot pivotally attached to a lower part of the main body to press a cloth, and a feed presser portion at one end facing the upper surface of the feed dog. A feed pressing body that is biased upwards by a lever, an operating lever that is pivotally attached to the main body and one end is engaged with a needle bar, and a pressing piece that is pivotally attached to the main body and is attached to the tip of the feed pressing portion. It is composed of a transmission lever placed on the upper surface and one end of which is moved by a projecting pin on the actuating lever, so that the cloth is reliably fed by the cooperation of the feed presser body and the feed dog, and is formed on the presser foot. It is characterized in that the sewing cloth can be swung easily by forming a feed pressing portion window having a front edge on the cloth feeding side of the needle drop hole.

[0005]

[Action]

 The present invention relates to a presser body having an attachment portion attached to the lower end of a presser bar attached to an arm machine frame, a presser foot swingably supported by the end portion of the presser body, and a spring within the presser body. , A feed presser body supported by the presser body, an operating lever swingably supported by the presser body, and a swingable supporter supported by the presser body, one end of which abuts against the presser foot and the other end of the lever operates by In a synchronous feed presser for a sewing machine, which comprises a transmission lever that abuts against an action pin of the lever, it is provided on the presser tooth portion and the presser foot provided on the feed presser portion that extends forward below the feed presser body. By arranging each front edge of the feed presser window behind the needle drop hole provided in the presser foot, it is possible to improve the swivel performance of the cloth by the cloth guide as well as the reliable feeding of the cloth. Tuning of sewing machines characterized by Riosae.

[0006]

【Example】

 A structure of an embodiment of the present invention will be described with reference to the drawings. A needle bar 2 and a presser bar 3 are mounted on an arm machine frame 1 of a sewing machine so as to be vertically movable, and the needle bar 2 rotates a drive shaft. The presser bar 3 is interlocked with the rotation of a presser foot upper lever (not shown) by the operator, and the needle bar 2 has a needle stopper body 4 attached to the lower end thereof. The sewing machine needle 5 is detachably fixed.

A presser spring (not shown) is attached to the upper part of the presser bar 3 so as to constantly press the presser bar downward, and a tuned feed presser 6 is removable at the lower end by a tightening screw 7. It is firmly attached to Noh.

The synchronized feed presser 6 is composed of a presser body 20, a presser foot 30, a feed presser body 40, an operating lever 50, and a transmission lever 60.

The presser body 20 includes a presser bar attachment portion 21, a support arm 22 for pivotally mounting the presser foot 30, and vertical and parallel surfaces 23, 23 for holding the feed presser body 40. An inverted U-shaped portion consisting of a horizontal portion 24 connecting the surfaces, a vertical wall portion having the surface 23, a ridged edge 25 on the lower side, and the actuating lever on the other wall portion. An arcuate window 26 for limiting the swing amount of 50 to a certain range amount, a support pin 27 for swingably supporting the transmission lever 60, and arm portions 28, 28 for swingably supporting one end of the lever 50. And are provided.

The presser foot 30 is located on the rear side of the zigzag needle drop hole 31 provided on the front side of the pivot point P-P by the support arm 22, that is, on the cloth feeding side, that is, on the cloth feeding side. The feed pressing windows 32, 32 are provided at a position having a width larger than the width D of the needle drop hole.

The feed presser body 40 has two sliding walls 41, 41 inwardly inscribed in the vertical parallel surfaces 23, 23 of the presser body 20 and a part of the slide wall, and protrudes from the presser body 20. Of the guide pin 42 engaged with the recessed edge portion 25, the feed pressing portion 43 extending forward and downward, and the synthetic resin having the downward teeth formed on the lower surface of the feed pressing portion. A pressing tooth portion 44 (for example, polyacetal) and a spring engaging portion 45 formed on the upper surface of the feed pressing portion 43 are provided, and the spring engaging portion and the upper horizontal portion 24 of the pressing body 20 are provided. A tension coil spring 46 is mounted between them and is always pulled toward the horizontal portion 24 side of the holding body 20.

A horizontal pivot shaft 51 is provided at the base end of the actuating lever 50, and the pivot shaft is rotatably fitted in the holes formed in the arm portions 28, 28 formed in the holding body 20. Since the tip 52 is brought into contact with the cylindrical stopper of the needle stopper 4 fixed to the needle bar 2, the actuating lever 50 is swung by the vertical movement of the needle bar.

A working pin 53 is erected at an appropriate position of the actuating lever 50, and the working pin penetrates an arcuate window 26 formed in the vertical wall 23 of the presser foot 20.

The transmission lever 60 has a contact member 62 with a small friction coefficient, which is attached downward at the tip 61, facing the upper surface of the extended feed pressing portion 43 of the feed pressing body 40, and the other end of the contact member 62. The bar 63 is brought into contact with the upper side of the action pin 53 of the operating lever 50.

Since the present invention has the above-described structure, the presser bar attachment portion 21 of the presser body 20 is attached to the lower end of the presser bar 3, and the tip end portion 52 of the operating lever 50 is fixed to the needle bar 2. Set so as to abut on the cylindrical portion of 4. Next, when the sewing machine is operated, the operating lever 50 is swung by the vertical movement of the needle bar 2.

When the tip portion 52 of the actuating lever 50 descends, the lever 63 of the transmission lever 60 that engages with the action pin 53 descends, so that the one end portion 61 of the transmission lever 60 is raised. Since the feed pressing portion 43 is pulled up by the spring 46 so that the feed pressing portion 43 is always in contact with the lower side of the one end portion, the pressing tooth portion 44 provided below the feed pressing portion 43 is separated from the surface of the feed tooth F. The cloth sewn at this time is pressed against the upper surface of the needle plate mounted on the bed by the presser foot 30, and the needle is pierced.

When the tip portion 52 of the actuating lever 50 rises, the pressing tooth portion 44 is strongly pressed against the feed dog with the cloth sandwiched, contrary to the situation described above. When the presser tooth portion 44 is lowered and is lowered from the feeding presser window 32 of the presser foot 30, the presser foot 30 is raised and separated from the cloth. At this time, the needle stuck in the cloth also rises and is pulled out of the cloth, and the feed dog protruding above the needle plate surface moves the cloth sandwiched between the pressing tooth portion 44 above. By repeating this motion, the cloth can be reliably fed.

Further, in the present invention, when the operator wants to change the feeding direction during sewing, when the operator moves the cloth to a desired direction, that is, left or right, the operator meshes with the feed dog in a direction orthogonal to the cloth feeding direction including the needle drop portion. Since there is no presser tooth portion 44, it is very easy to change the direction of the cloth.

That is, as shown in FIG. 3, the sewing stitch points A1, A2, A3, and A4 are successively advanced in the direction of arrow A by the cloth feeding, and when the cloth W is bent in the XA direction just before A5 is sewn, it is fed. Since the front end edge E of the presser portion is arranged behind the needle drop hole H, the cloth W is positioned between the needle drop hole H and the front end edge E of the feed presser portion 44, that is, the immediately preceding sewing point A4. It is possible to bend at approximately the same point as the position.

[0020]

【effect】

 Since the present invention has the structure and operation as described above, since the cloth is held by the feed dog and the presser tooth portion, the cloth is not slipped and the cloth is reliably fed and the presser tooth portion is provided. Since the front end of the presser foot feed and presser window for inserting the presser foot is located closer to the cloth feed side than the needle drop hole of the presser foot, it is very easy to change the direction of the cloth and It is a great practical effect that beautiful seams can be created.

[Brief description of drawings]

FIG. 1 shows an embodiment of the present invention, FIG. 1 is an external perspective view showing a state in which the present invention is mounted on a sewing machine, FIG. 2 is an exploded perspective view of the present invention, and FIG. 3 is a plan view of essential parts of the present invention. FIG. 4 is a plan view of a conventional main part. 20 ... Presser main body 30 ... Presser foot 31 ... Needle hole 32 ... Feed presser window 40 ... Feed presser body 44 ... Presser tooth 50 ... Operating lever 60 ... Transmission lever

Claims (1)

[Scope of utility model registration request] A presser foot body 20 having a mounting portion attached to the lower end of a presser bar attached to an arm machine frame, a presser foot 30 swingably supported by the end portion of the presser foot body, and a spring in the presser foot body 20. , A feed presser body 40 supported by the presser body 20, an operating lever 50 swingably supported by the presser body 20, and a swingable supporter by the presser body 20, one end of which abuts against the presser foot 30 and the other end of which is supported. In a synchronized feed presser of a sewing machine, which comprises a lever for contacting the action pin of the actuating lever 50 with a transmission lever 60, a presser tooth portion provided on a feed presser portion extending forward below the feed presser body 40. 44 and a feed presser window 32 provided on the presser foot 30. The front feed edge of the feed presser window 32 is arranged rearward of the needle drop hole 31 provided on the presser foot 30.