JP3050374U - Cloth foot for sewing machine - Google Patents

Abstract

(57) [Summary] [PROBLEMS] To provide a cloth presser which can sew even a velvet-like cloth without causing displacement and pulling of upper and lower suture cloths when sewing a cloth with a sewing machine. A larger with taking the distance L ₂ between the falling position of the rotation support shafts 12 and the needle 7 of the presser foot 11, the cloth presser foot
A central portion in the longitudinal direction of the eleventh portion is formed as a narrow convex flat portion 16 from the rear of the vertical movement position of the sewing needle 7 at the opening 15 between the presser plate toes 14 (the direction of feeding the suture cloth is indicated by an arrow B). The left and right portions 17 and 17 in the longitudinal direction are inclined surfaces toward both side edges, and the rear end portion is also an inclined surface portion 18. Therefore, since the suture cloth portion sewn by the suture is mainly pressed by the bottom convex flat portion 16 of the cloth presser foot 11,
The area for pressing the suture cloth is small, and the pressure for pressing the suture portion of the suture cloth can be reduced, so that the upper and lower suture cloths can be prevented from being displaced and tight.

Description

[Detailed description of the invention]

[0001]

[Industrial applications]

 The present invention relates to a presser foot used for a sewing machine.

[0002]

[Prior art]

 As shown in FIG. 4, the presser foot 1 conventionally used is mounted on the lower part of the presser foot bar 2 through the mounting groove 4a and the notch groove 4b formed on the presser foot support bracket 4, and the mounting screw 3 is used. The presser foot support bracket 4 is fixed, and the presser foot 6 is supported by a pin 5 below the presser foot support bracket 4 so as to be swingable, and is moved toward the needle plate (not shown) by the bottom face 6a of the presser foot. It is designed to hold the suture cloth. The pin 5 is provided closer to the vertical axis 7a of the sewing needle 7 than the axis 2a of the presser bar 2, and the pressing force of the presser bar 2 against the sewing cloth is close to the sewing position of the sewing needle 7. Further, a spring 8 is interposed between the presser supporting bracket 4 and the presser foot 6, and the tip of the presser foot 6 is urged to rotate slightly upward. . The cloth presser foot 6 has an opening at its distal end, which is formed with a toe curved upward and downward from the sewing position (needle drop position) A of the sewing machine needle 7 to the insertion side (distal end) of the sewing cloth. A cloth feeder that has a groove shape and holds the suture cloth from above to the needle plate, and has three feed teeth between the widths corresponding to the width of the work clamp foot provided at the lower part of the needle plate. The teeth are displaced and moved in the shape of a parallelogram through the corresponding through-grooves of the needle plate to feed the suture cloth while pressing the suture cloth with the cloth foot.

[0003] As described above, the cloth presser foot 6 is placed above the sewing machine needle 7 from the center line 2a of the cloth presser bar 2 so that a strong pressing force can be applied to the suture cloth near the sewing position. It is attached to the presser foot support bracket 4 via the pin 5 at a position near the lowering line 7a.

However, since the suture cloth is pressed from above by the cloth presser foot 6, a frictional force acts between the cloth presser foot 6 and the upper surface of the suture cloth, so that the relative position between the upper and lower surfaces of the suture cloth changes. Fear comes out. In order to avoid this, it has been considered to provide a roller on the back surface of the presser foot to reduce friction. (See, for example, Japanese Utility Model Laid-Open No. 2-4569)

[0005] However, in order to press the suture cloth from above and below when sewing the sewing machine, when sewing long pieces of hair such as velvet together, when using the above-mentioned cloth presser foot, Since the foot is pushed and the user falls asleep in the appropriate direction, a cloth slip may occur between the upper and lower cloths, and a correct suture may not be obtained. In addition, even in the case of a synthetic fiber material, there is a possibility that a cloth shift or a twitch may occur.

[0006]

[Problems to be solved by the invention]

 The purpose of the present invention is to solve the above-described problems inherent in the conventional presser foot, to have a simple structure, to have a low presser foot resistance, to prevent the upper and lower suture cloths from shifting or to be tight, and to be able to use a velvet-like material. The aim is to obtain a cloth presser foot that can be sewn even with a simple cloth.

[0007]

[Means for Solving the Problems]

 The presser foot of the present invention has the following configuration to solve the above-mentioned problem. (1) A presser foot support bracket having a presser foot mounting rod mounting hole, and a presser foot swing support shaft hole provided substantially below the presser bar, and a presser foot support bracket attached to the presser foot support bracket. A suture opening for the sewing machine needle is provided on the front side, and the cloth pressing surface faces the cloth feed dog provided at the lower part of the needle plate with a width enough to press the suture thread backward from the opening. A presser foot for a sewing machine, comprising a presser foot forming a convex surface in the longitudinal direction. (2) A presser foot support bracket having a presser foot mounting rod mounting hole and a presser foot foot pivot shaft hole provided almost directly below the presser bar, and a pivoting support shaft attached to the presser foot support bracket. A suture opening for the sewing machine needle is provided on the front side, and the cloth pressing surface faces the cloth feed dog provided at the lower part of the needle plate with a width enough to press the suture thread backward from the opening. A convex surface in the longitudinal direction is formed at the center of the presser foot following the opening, and an inclined surface is formed from the convex surface toward both side edges, and the inclined surface of the presser foot is In order to correspond to both side feed dogs, the main cloth feed is performed by the action of the convex plane in the center and the cloth feed tooth, and the cloth presser foot which is subordinately operated by the action of the both side inclined surface and the cloth feed tooth. And a cloth foot for a sewing machine.

[0008]

[Action]

 The sewing machine cloth presser according to the present invention has a small area for pressing the suture cloth, and the cloth presser surface only presses the portion of the suture cloth along the suture thread mainly. A small pressing force is required, and the rotary shaft of the presser foot is located directly below the presser bar.Therefore, only a relatively small pressure is applied to the sewing needle sewing position, and the cloth displacement of the sewing cloth, pulling, etc. It is unlikely to occur.

[0009]

【Example】

 FIG. 1 is a side view showing the structure of the presser foot according to the present invention, and FIGS. 2 and 3 are component diagrams showing members constituting the presser foot shown in FIG. 1, FIG. 2 is a presser support bracket, and FIG. This shows the structure of the presser foot.

As shown in FIGS. 1 to 3, the presser foot according to the present invention has a presser foot supporting bracket 10 of a presser foot 9 attached to a presser rod 2 by a mounting screw 3 like a conventional presser foot. At a substantially vertical lower position of the presser bar 2, the presser foot 11 is moved by a rotary support shaft 12 penetrating the lower support plates 11 a, 11 a formed on both sides of the presser foot 11. The tip of the tip of the tip 11 is pivotally supported to be able to swing upward somewhat, and the tip of the tip of the tip is located between the presser foot support bracket 10 and the presser foot 11 as in the conventional example. A spring 13 is provided so as to be urged against the spring 13. With this configuration, the distance L ₂ between the position immediately below the pivot 12 of the presser foot 11 and the needle drop position A of the sewing machine needle 7 is the same as the conventional presser foot shown in FIG. It is formed longer than the distance L ₁ in the case of foot 6.

FIG. 3 shows the structure of the cloth presser foot 11, and the back surface of the cloth presser foot 11 shown in FIG. 1A as a front view is a bottom view (b) and a side view. As can be seen from FIG. 4C, the center of the presser foot 11 in the longitudinal direction is located at the opening 15 between the toe portions 14 and 14 of the presser plate (the feed direction of the suture cloth is indicated by an arrow B). The vertical movement position 7a is formed on the narrow convex surface portion 16 from the rear, and the left and right portions 17, 17 in the longitudinal direction are inclined toward both side edges, and the rear end also faces rearward. The inclined surface 18 is formed. Note that the height of the narrow convex flat portion 16 may be appropriately selected and adopted so as to match the characteristics depending on the length, thickness, and the like of the bristle of the suture cloth.

As described above, since the length of the presser foot 11 is longer than that of the conventional presser foot 6, three grooves 19a, 19b, and 19c are shown in FIGS. 4A and 4B, respectively. As shown in a plan view, a needle plate 19 having a needle hole 7b formed therein and a feed dog 20 having three feed dog portions 20a, 20b and 20c corresponding to the three grooves are shown in plan view. In the portion corresponding to the feed dog groove and the feed dog on the left side of the lines CC and DD, since the presser foot 11 is longer than the conventional presser foot 6, the feed dog, It is desirable to form an extra feed dog groove (cloth feeding and sewing are possible even if the length of the feed dog is not increased).

The presser foot 11 of the presser foot 9 is configured as described above, the center of the bottom surface of the presser foot 11 is a bottom convex flat portion 16, and the left and right portions in the longitudinal direction are inclined surfaces 17, respectively. In the sewing of the suture cloth, the cloth presser foot 11 presses the suture cloth portion sewn with the suture thread by the bottom convex flat portion 16, and the left and right portions 17 and 17 in the longitudinal direction are supplementarily sewn. The left and right side portions of the yarn are pressed auxiliary. Therefore, the cloth feed is mainly performed between the central feed dog 20a located on the lower surface of the sewing portion of the work clamp foot 11 by the sewing machine needle 7 and the bottom convex flat portion 16 of the work clamp foot 11, and The engagement of the cloth feed teeth 20b and 20c with the cloth presser foot longitudinal left and right portions 17 and 17 for the cloth feed acts in an auxiliary manner. Therefore, as described above, the shape of the convex portion of the bottom convex flat portion 16 may be appropriately selected and determined depending on the type of the cloth to be sutured.

[0014]

[Effect of the invention]

The sewing machine presser foot according to the present invention mainly presses the sewn cloth portion sewn with the suture thread by the bottom convex flat portion 16 of the presser foot 11, so that the area for pressing the sewn cloth is narrow, and the Since the presser surface only presses the suture thread portion of the suture cloth mainly, the pressing force on the suture cloth by the presser bar can be small, and the presser foot can be supported just below the presser bar. since increasing the distance L ₂ between the swing supporting shaft 12 for pressing the supporting bracket 10 of the needle stitching position a and the cloth presser foot 11, stitching cloth using a sewing needle location (sewing position by the needle moves up and down) a little floating The state is similar to that of the sewing cloth, and only a relatively small pressure is applied to the sewn portion of the sewn cloth.

[Brief description of the drawings]

FIG. 1 is a front view showing a configuration of a presser foot according to the present invention.

2 (a) is a front view, FIG. 2 (b) is a top view, FIG. 2 (c) is a bottom view, FIG. 2 (d) is a side view, and FIG. In d), the presser foot is indicated by a virtual line.

FIG. 3 is a view showing a configuration of a work clamp foot shown in FIG. 1;
Is a front view, (b) is a bottom view, and (c) is a side view.

FIG. 4 is a plan view showing a needle plate and a feed dog of the sewing machine;
(A) shows a needle plate, and (b) shows a feed dog.

FIG. 5 is a front view showing the structure of a conventionally used cloth presser.

[Explanation of symbols]

 2 Presser bar 3 Mounting screw 8 Sewing machine needle 9 Work clamp 10 Work clamp foot support bracket 11 Fabric presser foot 12 Rotating support shaft 13 Spring 14 Fabric presser foot toe 15 Opening 16 Bottom convex flat surface 17 Left and right inclined surface 18 Rear inclined surface 19 Needle plate 20 Feed dog

Claims (2)

[Utility model registration claims] 1. A presser foot supporting bracket having a presser foot mounting rod mounting hole and a presser foot foot swinging support hole provided at a position substantially directly below the presser bar, and a swinging support shaft provided on the presser foot supporting bracket. A sewing suture opening for the sewing machine needle is provided on the front side, and the cloth pressing surface faces the cloth feed dog provided at the lower part of the needle plate with a width enough to press the suture thread backward from the opening. Fabric presser foot that forms a longitudinal convex surface
And a cloth foot for a sewing machine. 2. A presser foot support bracket having a presser foot mounting rod mounting hole, and a presser foot foot swing support shaft hole provided at a position directly below the presser bar, and a swing support shaft provided on the presser foot support bracket. A sewing suture opening for the sewing machine needle is provided on the front side, and the cloth pressing surface faces the cloth feed dog provided at the lower part of the needle plate with a width enough to press the suture thread backward from the opening. In the center of the presser foot, a longitudinal convex plane is formed following the opening, and an inclined surface is formed from the convex plane toward both side edges. The cloth presser foot is adapted to correspond to both side feed dogs, and the main cloth feed is performed by the action of the convex plane in the center and the cloth feed tooth, and the action of the both side inclined surfaces and the cloth feed tooth. And a presser foot for a sewing machine.