JP2016054830A - Sewing machine foot - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a sewing machine foot which is adapted to the case of sewing while guiding an element row of a concealed slide fastener and the case of simply sewing without guiding the element row.SOLUTION: A sewing machine foot of the present invention includes: a shank (2) attached to a presser bar of a sewing machine; and a foot (3) supported by the shank (2). The foot includes: a presser part (3A) which is supported by the shank and presses an object (9) to be sewn; and an element guide (4) in which a guide groove (42a) for guiding an element row (93) of a slide fastener as one portion of the object to be sewn is formed, and which is provided so as to be displaceable to a first position and a second position with respect to the presser part. The first position is a position of guiding the element row. In this case, the guide groove is positioned so as to be projected to an outside in the width direction of the presser part with respect to one side face of the presser part. The second position is a position of not guiding the element row. In this case, the guide groove is positioned on an inside in the width direction with respect to the one side face of the presser part.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a sewing machine foot that holds a sewn product and guides an element row of a hidden slide fastener that is a part of the sewn product.

  As one of the components of the sewing machine, there is a sewing machine foot for pressing a sewing product placed on the sewing machine table from above. And, as one of the conventional sewing feet, it has a handle portion that is attached to the presser bar of the sewing machine and a tape pressing portion that is attached to the lower end portion of the handle portion. There is a structure in which a guide groove for guiding is formed (Patent Document 1).

Japanese Utility Model Publication No. 54-54462

  However, the conventional sewing machine foot described above is specialized for sewing while guiding the element row of the hidden slide fastener, and the guide groove is always directed downward at a certain position. Therefore, when sewing is simply performed without guiding the element row (for example, when something other than the hidden slide fastener is used as the sewing product), another sewing machine foot has to be replaced with the presser bar of the sewing machine.

  The present invention was created in consideration of the above circumstances, and its purpose is a sewing machine corresponding to a case where sewing is performed while guiding the element row of the hidden slide fastener and a case where sewing is performed without guiding the element row. Is to provide a foot.

  The first sewing machine foot of the present invention includes a shank attached to the presser bar of the sewing machine and a foot supported by the shank. The foot is an element guide that is supported by the shank and that holds a sewing product and a guide groove that guides an element row of a slide fastener that is one of the sewing products. An element guide that is displaceably provided at the first position and the second position is provided. In addition, the first position is a guide position of the element row. In this case, the guide groove is a position protruding outward in the width direction of the press portion with respect to one side surface of the press portion, and the second position is the element row. In this case, the guide groove is located inward in the width direction with respect to the one side surface of the pressing portion.

There is no limitation on the configuration in which the element guide is provided so as to be displaceable to the first position and the second position with respect to the pressing portion, but the following configuration is desirable as a simple configuration.
That is, the element guide is provided so as to be movable in the width direction with respect to the pressing portion.

Moreover, it does not ask | require whether the pressing part has the needle penetration part formed in said one side surface. However, in order to facilitate the use of the first sewing foot, it is desirable to do the following.
That is, the pressing portion is formed with a needle-passing portion on the one side surface.

The structure in which the element guide is provided so as to be movable in the width direction with respect to the holding portion is not limited. However, when sewing while guiding the element row of the hidden slide fastener, the state in which the element row is guided is stabilized. In order to stabilize the sewing in the case of simply performing sewing without guiding the element row, it is desirable to do the following.
That is, the pressing portion includes a guide passage portion that guides the element guide, a first surface that extends in a direction opposite to the needle feed portion in the one side surface, in a direction opposite to the feeding direction of the sewing product, and the one side surface. A second surface extending in the feeding direction from the needle passage portion, a guide passage portion for guiding the element guide, and a receiving space communicating with the guide passage portion between the first surface and the needle passage portion are provided. . The element guide includes a slide part that can move along the guide passage part, and a guide main body part that protrudes from the slide part in the width direction and can enter and exit the accommodation space.

Also, when sewing while guiding the element row of the hidden slide fastener, the state in which the element row is guided is made more stable, or when sewing is simply performed without guiding the element row, the sewing is made more stable. It is desirable to do as follows.
That is, at the first position of the element guide, the guide main body portion protrudes from the accommodating space, and the first surface of the pressing portion and the inner inner wall surface of the guide groove are the same plane continuous in the feeding direction. To do. Further, at the second position of the element guide, the guide main body is accommodated in the accommodating space, and the first surface and the outer surface of the guide main body are the same plane continuous in the feeding direction.

Further, the configuration in which the element guide is provided so as to be displaceable in the width direction with respect to the pressing portion is preferably a configuration in which the element guide is not unexpectedly displaced during sewing, and the following is preferable.
That is, the first sewing machine foot of the present invention includes a main shaft that pivotally supports the pressing portion on the lower end portion of the shank, in addition to the hook including the pressing portion and the element guide, and the shank, and the main shaft. And a first lock mechanism for restricting the swinging of the foot and the movement of the element guide with respect to the pressing portion. The first lock mechanism includes a lever swingably supported by the main shaft and an elastic member attached between one end of the lever and the shank, and the other end of the lever to which the restoring force of the elastic member is applied. The part shall press the element guide against the holding part.

  In the present invention, the second sewing machine foot includes a shank attached to the presser bar of the sewing machine and a foot supported by the shank. The foot includes a supported member that is supported by the shank and a pressing member that is pivotally supported by the supported member so that the feed direction of the sewing product is an axial direction. The pressing member includes a pressing portion main body for pressing the sewing product and an element guide portion in which a guide groove for guiding an element row of a slide fastener that is one of the sewing products is formed. The pressing portion main body includes a first side surface and a second side surface that face the width direction separately, and a first pressing surface and a second pressing surface that face the vertical direction separately and connect the first side surface and the second side surface. It is a waste. The element guide part projects in the width direction from only the first side surface of the first side surface and the second side surface. In addition, the first pressing surface and the second pressing surface press the sewn product when it becomes the lower surface of the pressing portion main body.

Further, in the pressing portion main body, either the first pressing surface or the second pressing surface becomes a surface for pressing the sewing product depending on the opening direction of the guide groove.
That is, when the guide groove opens downward, the first pressing surface becomes the lower surface of the pressing portion main body, and when the guide groove opens upward, the second pressing surface becomes the lower surface of the pressing portion main body.

The foot only needs to pivotally support the pressing member with respect to the supported member, and it does not matter whether or not the rotation is restricted. However, it is desirable to stabilize the sewing as follows.
That is, it is assumed that the supported member and the pressing member are connected by a connecting shaft having the feeding direction as an axial direction. In addition, the second sewing machine foot is provided with a second lock mechanism that restrains the rotation of the pressing member around the connecting shaft.

  Of the sewing machine foot according to the present invention, the element guide that is displaceable to the first position and the second position with respect to the pressing portion is provided by changing the position of the element guide, so that the element of the hidden slide fastener This can correspond to a case where the sewing is performed while guiding the row and a case where the sewing is performed simply without guiding the element row.

  In addition, for a sewing machine foot in which the pressing portion includes a guide passage portion, a first surface, a second surface, and an accommodation space, and the element guide includes a slide portion and a guide main body portion, the first surface and the inside of the guide groove By making the inner wall surface and the same plane continuous in the feed direction of the sewing product, the state in which the element row is guided is stabilized when sewing is performed while guiding the element row. In addition, when the element row is simply sewn without being guided, the first surface and the outer outer wall surface of the guide main body are in the same plane continuous in the feed direction of the sewing product. There is no interference and sewing can be performed stably.

  Furthermore, in the case of a sewing machine foot in which the foot pressing part is supported by the lower end of the shank by the main shaft so that the lever receives the restoring force of the elastic member, the movement of the element guide and the swinging of the pressing part are restrained. , Sewing becomes stable.

  Of the sewing machine foot according to the present invention, the presser member includes a presser part main body and an element guide part, and the presser member that is rotatably supported with the feed direction as an axial direction with respect to the supported member is a presser. By changing the direction of the member by rotation, it is possible to cope with the case of sewing while guiding the element row of the hidden slide fastener and the case of simply sewing without guiding the element row.

  If the sewing machine foot that allows the pressing member to rotate is provided with a second lock mechanism that restrains the rotation of the pressing member around the connecting shaft, the sewing becomes stable.

It is a perspective view which shows the sewing machine foot of 1st Embodiment of this invention, and is a state which guides an element row | line. It is a right view of the sewing machine foot of a 1st embodiment. It is a top view of the sewing machine foot of a 1st embodiment. It is a front view of a sewing machine foot of a 1st embodiment. It is the VV sectional view taken on the line of FIG. It is the VI-VI sectional view taken on the line of FIG. It is a perspective view which shows the sewing machine foot of 1st Embodiment, and is a state which does not guide an element row | line | column. FIG. 6 is a cross-sectional view corresponding to FIG. 5 in a state where the element row is not guided. It is a right view which shows the sewing machine foot of 1st Embodiment in the state which cancelled | released restraint of the slide guide by a lever. It is sectional drawing which shows the sewing machine foot of 1st Embodiment which is guiding the element row | line | column. It is sectional drawing which shows the sewing machine foot of 1st Embodiment which is guiding an element row | line | column, Comprising: The part located in the front side rather than a needle hole is shown. It is sectional drawing which shows the sewing machine foot of 1st Embodiment in the state which does not guide an element row | line | column. It is sectional drawing which shows the to-be-sewn thing of a hidden slide fastener and cloth. It is a perspective view which shows the sewing machine foot of 2nd Embodiment of this invention, and is a state which guides an element row | line. It is a left view which shows the sewing machine foot of 2nd Embodiment. It is a front view which shows the sewing machine foot of 2nd Embodiment. It is a top view which shows the sewing machine foot of 2nd Embodiment. It is the XVIII-XVIII sectional view taken on the line of FIG. It is sectional drawing which shows the state which operated the locking mechanism of the sewing machine foot of 2nd Embodiment. It is a perspective view which shows the sewing machine foot of 2nd Embodiment, and is a state which does not guide an element row | line | column. It is a front view which shows the sewing machine foot of 2nd Embodiment of the state which does not guide an element row | line | column.

  An example of a product sewn by the sewing machine foot of the present invention, that is, an example of a sewn product is shown in FIG. The sewn product 9 is a sewn product of a hidden slide fastener 91 and a fabric 95. In the following description, not only the stitched item but also the item before the stitching, that is, the state in which the hidden slide fastener 91 and the fabric 95 are overlapped, will be referred to as the sewn item 9.

  The hidden slide fastener 91 includes a pair of fastener tapes 92, 92, an element row 93 fixed along the side edge of each fastener tape 92, and a slider (sliding along the pair of element rows 93, 93). (Not shown). Each fastener tape 92 has its end in the width direction folded back and overlapped, and an element row 93 made of coil elements is sewn on the back of the end. The sewing machine foot of the present invention can be used when sewing each fastener tape 92 and the fabric 95 along each element row 93 of such a hidden slide fastener 91.

  As shown in FIGS. 1 to 4, the sewing machine foot 1 according to the first embodiment of the present invention has a shank 2 attached to a presser bar of the sewing machine, a foot 3 supported by the shank 2, and the foot 3 can swing on the shank 2. And a first lock mechanism 6 for restraining the swing of the foot 3 about the main shaft 5 connected to the element 3, and the element guide 4, which is a part of the foot 3, at the first position and the second position. Displaceable. The first position is a position where the element row 93 of the sewing product 9 is guided by the element guide 4 (hereinafter referred to as “element row guide position”). The second position is a position where the element row 93 is not guided by the element guide 4 (hereinafter referred to as “element row non-guide position”).

  In describing the subsequent directionality, the feeding direction of the sewing product 9 is also referred to as a front direction, and the front side is the upper side of FIG. The direction parallel to the feed direction of the sewing product 9 is also referred to as the front-rear direction. Further, the vertical direction is a direction in which the needle M1 (see FIG. 10) of the sewing machine reciprocates, and is a direction orthogonal to the paper surface of FIG. The upper side is the near side in the direction orthogonal to the paper surface of FIG. 3, and the lower side is the back side of the direction orthogonal to the paper surface of FIG. The direction orthogonal to the feeding direction and the vertical direction of the sewn product 9 is also referred to as the width direction or the left-right direction. The left side is the left side of FIG. 3, and the right side is the right side of FIG.

  As shown in FIGS. 1 to 4, the shank 2 is provided with an insertion hole 21 for inserting a presser bar (not shown) of a sewing machine extending in the vertical direction at the center in the front-rear direction. The insertion hole 21 is formed in a shape penetrating up and down in the right portion (excluding the left end portion) of the shank 2, and is formed in a U shape that opens upward in the left end portion of the shank 2. In other words, the shank 2 includes a front plate 22 and a rear plate 23 that are opposed to each other in the front-rear direction, and a side plate 27 that joins the left end portions of the front plate 22 and the rear plate 23. The upper surface is formed in a U-shaped opening. The front plate 22, the side plate 27, and the rear plate 23 are arranged such that the upper ends of the front plate 22, the side plate 27, and the rear plate 23 are aligned horizontally, while the lower ends of the front plate 22, the side plate 27, and the rear plate 23 are formed in this order. The rear plate 23 includes a rear plate main body 24 extending in the vertical direction, a top plate 25 protruding rearward from the lower end portion of the rear plate main body 24, and a pair of support plates extending downward from the left and right end portions of the top plate 25. 26, 26. The support of the foot 3 by these support plates 26 will be described later.

  The foot 3 includes a pressing portion 3A that is supported by the shank 2 and presses the sewing product 9 and an element guide 4 in which a guide groove 42a that guides the element row 93 of the sewing product 9 is formed. The element guide 4 is provided to be displaceable.

  As shown in FIGS. 4 and 6, the pressing portion 3 </ b> A includes a supported portion 31 that is supported by the shank 2 and a pressing portion main body 32 that presses the sewing product 9. The pressing portion 3 </ b> A has an L shape when viewed from the left side, and extends the supported portion 31 upward from the front portion of the upper surface of the pressing portion main body 32.

Further, as shown in FIG. 2, the pressing portion 3A includes an upper portion and a lower portion as separate members, and an upper portion 3U of the pressing portion 3A (hereinafter referred to as “upper pressing portion”) and a lower portion 3D (hereinafter referred to as “upper pressing portion”). It is referred to as a “lower presser part”) and is integrated by connecting with a bolt 3B.
The upper pressing portion 3U integrally constitutes the supported portion 31 and the upper portion of the pressing portion main body 32, and the lower pressing portion 3D constitutes the lower portion of the pressing portion main body 32. In other words, the presser body 32 is divided into upper and lower parts, and more specifically, the presser part body 32 is an integrated body in which two plates extending in the front-rear direction are stacked vertically, and the lower plate 32D is the presser part. The lower part of the main body 32 (that is, the lower pressing part 3D) is configured, and the upper plate 32U configures the upper part of the pressing part main body 32. The supported portion 31 protruding upward from the front portion of the upper plate 32U and the upper plate 32U constitute the upper pressing portion 3U.
Further, as shown in FIG. 6, in order to position the upper pressing portion 3U in the left-right direction with respect to the lower pressing portion 3D, the width of the upper pressing portion 3U is made narrower than that of the lower pressing portion 3D. A step portion 33 is formed on the front portion of the 3D so as to protrude upward compared to the rear portion. A positioning groove 34 extending in the front-rear direction is formed on the upper surface of the step portion 33 in the center in the left-right direction, and the width of the positioning groove 34 in the left-right direction is slightly wider than the upper plate 32U. The bottom surface is flush with the upper surface of the rear portion of the lower pressing portion 3D. Then, when the upper pressing portion 3U is overlaid on the lower pressing portion 3D, the lower portion of the front portion of the upper pressing portion 3U (the upper portion of the pressing portion main body 32) is fitted into the positioning groove 34, whereby the lower pressing portion 3D is attached to the lower pressing portion 3D. The upper presser 3U is positioned in the left-right direction, and the upper presser 3U and the lower presser 3D are connected in the vertical direction with bolts 3B at the rear of each other, whereby the upper presser 3U and the lower presser 3D are integrated. 3 A of pressing parts are comprised. The lower surface of the lower pressing portion 3D is a flat surface for pressing the sewing product 9, and only the rear portion is a slope that gradually moves upward toward the rear.

  Further, as shown in FIGS. 1 and 3, on the rear side of the main shaft 5 that supports the pressing portion 3A, one of the left and right side surfaces of the pressing portion main body 32 (the left side in the drawing) has a needle passage portion 32h up and down. It is formed through. More specifically, when the upper pressing portion 3U and the lower pressing portion 3D are overlapped and integrated, the width of the lower portion (lower pressing portion 3D) of the pressing portion main body 32 (the lower pressing portion 3D) is set on the width side portions (left and right end portions). The upper part (upper pressing part 3U) does not overlap. A needle hole cut into a substantially semicircular shape when viewed from above, that is, a needle threading portion 32h is formed on the left side surface of the lower portion of the pressing portion main body 32 so as to penetrate vertically. Further, the side surface on the side of the needle threading portion 32h has a shape in which the rear side surface 36 projects outward in the width direction with respect to the side surface 35 on the front side of the needle threading portion 32h. More specifically, the side surface 35 on the front side of the needle threading portion 32h among the side surfaces on the needle threading portion 32h side is a surface parallel to the front-rear direction and a vertical surface (reference surface) parallel to the vertical direction. Of the side surfaces on the through portion 32h side, the side surface 36 on the rear side of the needle passage portion 32h is a surface parallel to the front-rear direction and an inclined surface inclined with respect to the vertical direction. The lower end of the inclined surface is the same as the position of the front side surface 35 in the left-right direction, and the length of the overhang increases as it goes upward. In FIG. The overhang length is increasing. The rear side surface 36 is also referred to as a first surface 36 or a first guide surface 36, and the front side surface 35 is also referred to as a second surface 35 or a second guide surface 35. The first guide surface 36 guides the element row 93 to the guide groove 42a. The second guide surface 35 may guide the element row 93 that has come out of the guide groove 42a.

  As shown in FIGS. 1 and 4, a guide groove 42 a that guides the element row 93 in cooperation with the first guide surface 36 is formed in the element guide 4. As a configuration in which the element guide 4 is provided so as to be displaceable with respect to the pressing portion 3A with respect to the first position and the second position, the element guide 4 is provided so as to be movable in the left-right direction with respect to the pressing portion 3A. The specific configuration is as follows.

As shown in FIGS. 5 and 6, the pressing portion 3 </ b> A includes a guide passage portion 37 that guides the element guide 4. The guide passage portion 37 extends in the width direction of the pressing portion 3A, the upper side is formed by the upper pressing portion 3U, and the lower side is formed by the lower pressing portion 3D. More specifically, a guide groove 37a that opens upward is formed in the front portion (front side of the step portion 33) of the upper surface of the lower pressing portion 3D so as to penetrate in the left-right direction. The upper pressing portion 3U closes the upper side of the guide groove 37a, so that the guide passage portion 37 is formed penetrating left and right.
An accommodation space 38 for accommodating the left side portion of the element guide 4 (guide body portion 42 described later) is formed in the first guide surface 36 of the pressing portion 3A so as to communicate with the guide groove 37a. More specifically, the accommodation space 38 is formed to vertically penetrate the first guide surface 36 of the lower pressing portion 3D and the left side of the portion corresponding to the upper plate 32U of the upper pressing portion 3U. Therefore, in accordance with the shape of the right side portion of the upper bottom 45 (described later) of the guide main body portion 42, a cutout portion 32c is formed through the left side portion of the upper pressing portion 3U so as to penetrate vertically.

  As shown in FIGS. 5 to 8, the element guide 4 protrudes from the slide portion 41 to the left side, which is one side in the left-right direction, and moves into and out of the accommodation space 38 along the guide passage portion 37. A possible guide main body part 42 and a stopper part 46 projecting downward from the right side, which is the other side in the left-right direction, from the slide part 41 are provided.

  The slide part 41 is a plate extending in the left-right direction, and is slightly thicker in the vertical direction than the depth of the guide groove 37a, slightly shorter in the front-rear direction than the guide groove 37a, and smaller than the guide groove 37a. The left and right dimensions are long enough.

  The guide body portion 42 has a U-shape that opens downward, and includes an inner wall 43 that protrudes upward and downward with respect to the slide portion 41, an outer wall 44 that is provided on the left side of the inner wall 43, and an inner wall 43. It is comprised from the upper bottom 45 which connects the upper end part of the outer wall 44. FIG. A U-shaped inner surface formed by the inner wall 43, the outer wall 44, and the upper bottom 45 serves as a guide groove 42a. The guide groove 42a includes a surface of the inner wall 43 (hereinafter referred to as “inner inner wall surface”) and a surface of the outer wall 44 (hereinafter referred to as “outer inner wall surface”), an inner inner wall surface 43a, It is formed by a surface (hereinafter referred to as “upper bottom surface”) 45a of an upper bottom 45 that connects the upper end with the outer inner wall surface 44a. The inner inner wall surface 43a and the outer inner wall surface 44a are inclined at the same angle as the first guide surface 36 of the pressing portion 3A. The outer wall 44 of the guide main body 42 includes an outer outer wall surface 44s as a surface opposite to the outer inner wall surface 44a. The outer outer wall surface 44s is hereinafter also referred to as a “third surface” or a “third guide surface 44s”. . The third guide surface 44s is inclined at the same angle as the first guide surface 36. The lower ends of the inner wall 43 and the outer wall 44 are formed at the same height as the lower surface of the pressing portion 3A.

The movement range of the element guide 4 in the left-right direction is determined when a part of the element guide 4 collides with the pressing portion 3A (the pressing portion main body 32).
The limit position on the left side of the movement range of the element guide 4 is the first position of the element guide 4. At this time, the stopper portion 46 collides with the pressing portion 3A, and the guide main body portion 42 accommodates the accommodating space 38 of the pressing portion 3A. Overhangs to the left. In the first position, the guide groove 42a extends outward in the width direction with respect to the side surface on the needle passing portion 32h side of the pressing portion 3A (more specifically, the first guide surface 36 of the side surface on the needle passing portion 32h side). Exists at the overhanging position. The inner inner wall surface 43a of the guide groove 42a and the first guide surface 36 are on the same plane continuous in the front-rear direction.
The limit position on the right side of the movement range of the element guide 4 is the second position of the element guide 4. At this time, the guide main body portion 42 collides with the pressing portion main body 32, and the guide main body portion 42 contacts the pressing portion main body 32. It is accommodated in the accommodation space 38. Further, in the second position, the guide groove 42a is located on the inner side in the width direction with respect to the side surface on the needle passing portion 32h side of the pressing portion 3A (more specifically, the first guide surface 36 on the side surface on the needle passing portion 32h side). To position. The first guide surface 36 and the third guide surface 44s of the guide groove 42a are the same plane that continues in the front-rear direction.

  Further, as shown in FIGS. 1 and 7, the first lock mechanism 6 that restrains the swing of the foot 3 around the main shaft 5 is to restrain the state in which the element guide 4 has moved to the left and right limit positions. It is. That is, the first lock mechanism 6 has both the restraint of the swing of the foot 3 and the restraint of the movement of the element guide 4. As shown in FIGS. 2 and 3, the first locking mechanism 6 includes a lever 61 that is swingably supported by the main shaft 5, and an elastic member 62 that is attached between one end of the lever 61 and the shank 2. Prepare. In the following, the first lock mechanism 6 will be described in detail while explaining the swing mechanism of the foot 3.

  The swing mechanism of the foot 3 is formed by connecting a supported portion 31 of the foot 3 to the lower end portion of the shank 2 so as to be swingable by the main shaft 5. As described above, the lower end portion of the shank 2 is formed by the two support plates 26 and 26 facing in the left-right direction, as shown in FIG. A supported portion 31 is disposed between the two support plates 26, 26, and extends in the left-right direction through through holes (not shown) formed in the two support plates 26, 26 and the supported portion 31, respectively. By inserting the main shaft 5 to be connected, the foot 3 is swingably connected to the shank 2. In addition, a lever 61 is sandwiched between the left and right directions of the two support plates 26 and 26 and the supported portion 31, and the main shaft 5 is inserted into a through hole (not shown) of the lever 61 so that the lever 61 is swingably supported. In the drawing, a lever 61 is sandwiched between the supported portion 31 and the right support plate 26, thereby positioning the foot 3 and the lever 61 in the left-right direction with respect to the shank 2.

  The lever 61 extends in the front-rear direction, and its middle portion in the longitudinal direction is a portion through which the main shaft 5 passes. Further, a tension coil spring as an elastic member 62 is stretched a little on the front end portion of the lever 61 in the longitudinal direction and the front plate 22 of the shank 2. A downward force is applied to the rear end portion of the lever 61 by the restoring force of the tension coil spring 62 and the foot 3 is pushed downward, so that the foot 3 is restrained from swinging. More specifically, the rear end portion of the lever 61 constrains the movement of the element guide 4 and the swinging of the pressing portion 3A by pressing the element guide 4 downward against the pressing portion 3A.

  Of these two restrained states, the lever 61 and the slide portion 41 of the element guide 4 are preferably provided as shown in FIG. Are formed with a concave portion 41a and a convex portion 61a which are fitted to each other. More specifically, the convex portion 61a protrudes downward from the rear end portion of the lever 61 extending in the front-rear direction. On the other hand, the concave portion 41a is formed to be depressed in the upper surface of the slide portion 41, and the formation position in the left-right direction is a position corresponding to the convex portion 61a in the state where the element guide 4 has moved to the left limit position (the convex portion 61a). Is a collision position).

The sewing machine foot 1 of the first embodiment described above is used as follows.
As shown in FIG. 10, when the sewing product 9 is the hidden slide fastener 91 and the fabric 95, and the sewing is performed while guiding the element row 93, the element guide 4 is set to the first position, and the concave portion 41 a of the element guide 4 is set. In this state, the convex portion 61a of the lever 61 is fitted. At this time, as shown in FIG. 4, the guide groove 42 a exists at a position protruding to the left side with respect to the first guide surface 36 of the pressing portion 3 </ b> A, and the guide main body portion 42 protrudes to the left side of the accommodation space 38. The inner inner wall surface 43a of the groove 42a and the first guide surface 36 are continuous in the front-rear direction. At this time, the state of the sewing product 9 is such that the fabric 95 and the fastener tape 92 of the hidden slide fastener 91 are sequentially overlapped on the sewing machine base M2, and the end in the width direction of the fastener tape 92 is bent upward together with the element row 93. A part of the element row 93 is in contact with the upper surface of the fabric 95. Then, sewing is performed in a state where the element row 93 is placed along the first guide surface 36 and accommodated in the guide groove 42a. When the sewing is performed, the element row 93 enters the guide groove 42a after passing through the first guide surface 36, and the sewing is performed stably.

  Moreover, there are the following advantages when sewing is started from a portion referred to as an open stop. The open stop is a portion where the slider exists when the slider is moved until the pair of element rows 93 and 93 are fully opened. In this case, I want to start sewing as close to the slider as possible. In the sewing machine foot 1 of the first embodiment, the second surface (reference surface) 35 located on the front side of the needle threading portion 32h of the side surface on the needle threading portion 32h side of the pressing portion 3A of the foot 3 is the needle threading portion. The first surface 36 located on the rear side of 32h does not protrude sideways. That is, the front second surface 35 is positioned on the inner side in the width direction with respect to the rear first surface 36, so that the slider does not easily interfere with the pressing portion 3A, and sewing can be performed as close as possible to the slider. As shown in FIG. 11, the edge of the fastener tape 92 to which the element row 93 is fixed passes through a position away from the second surface 35 that is the reference surface. In this case, the second surface 35 may function as the second guide surface 35 that suppresses the element row 93 from returning to the original state (the state of FIG. 13).

  Further, when the sewing product 9 is simply sewn without guiding the element row 93, the element guide 4 is set to the second position as shown in FIGS. 9 and 12, and the element guide 4 (a portion not the recess 41a) is set. ) Is pressed by the convex portion 61 a of the lever 61. At this time, the guide groove 42a is located on the inner side with respect to the first surface 36 of the pressing portion 3A, the guide main body portion 42 enters the accommodating space 38, and the first surface 36 and the third surface 44s are shown in FIG. As shown, it is continuous in the front-rear direction. Since the first surface 36 and the third surface 44s are in the same plane continuous in the front-rear direction, for example, a part of the sewn product 9 protrudes upward in a form close to the left side of the first surface 36. Even if it exists, a part thereof does not collide with the third surface 44s, and the sewing can be performed stably.

  In addition, the first locking mechanism 6 works during sewing, and the lever 61 receiving the restoring force of the tension coil spring 62 restrains the movement of the element guide 4 and the swinging of the pressing portion 3A, so that the sewing becomes stable. If the thickness of the sewing product 9 suddenly increases during sewing, the restoring force of the tension coil spring 62 increases, and the sewing is performed by swinging so that the tip of the foot 3 is raised.

  As shown in FIGS. 14 and 21, the sewing machine foot 1A according to the second embodiment of the present invention has a shank 2A attached to a presser bar of the sewing machine, a foot 7 supported by the shank 2A, and swings the foot 7 to the shank 2A. The main shaft 5 that can be connected and the second lock mechanism 8 that stabilizes the posture of the foot 7 are provided, and the direction of the pressing member 76 that is a part of the foot 7 is guided and guided to the element row 93 of the sewing product 9. It is provided so that it can be changed to a direction that does not. The sewing foot 1A of the second embodiment is basically the same as the shank 2 of the first embodiment with respect to the shank 2A, and is different from the first embodiment with the foot 7 and the second locking mechanism 8 as the center. Will be explained. In the following description of the directionality, a state in which the direction of the pressing member 76 guides the element row 93 is a reference state, and a reference drawing (a drawing corresponding to FIG. 3 of the first embodiment) is as follows. FIG.

  As shown in FIG. 18, the foot 7 can change the direction of the supported member 71 supported by the shank 2 </ b> A, the pressing member 76 that guides the element row 93 while pressing the sewing product 9, and the pressing member 76. Therefore, the connecting shaft 75 rotatably supports the pressing member 76 with respect to the supported member 71, and the axial direction of the connecting shaft 75 is the feed direction of the sewing product 9 (more precisely, the direction parallel to the feed direction). And a certain connecting shaft 75.

  As shown in FIGS. 14 and 16, the supported member 71 includes a supported portion main body 72 disposed below the shank 2A, and a pair of supported plates 73 protruding from the left and right of the upper surface of the supported portion main body 72. 73. The pair of supported plates 73, 73 are disposed between the pair of support plates 26, 26 at the lower end of the shank 2A, and the main shaft 5 passes through the pair of support plates 26, 26 and the pair of supported plates 73, 73. Are connected. Accordingly, the support member is supported so as to be swingable about the main shaft 5 with respect to the shank 2A. There is a vertical gap between the pair of supported plates 73 and 73 and the top plate 25 of the shank 2A. In FIG. 19, the lower surface of the top plate 25 is a sloped surface with the rear portion leveled and moving upward as it goes forward with respect to the rear portion. On the other hand, the upper surface of the supported plate 73 is leveled, A gap is formed. This gap allows the supported member 71 (foot 7) to swing clockwise and counterclockwise about the main shaft 5 with respect to the state where the lower surface is horizontal.

  As shown in FIG. 14, the pressing member 76 is integrally provided with a pressing portion main body 77 that presses the sewing product 9 and an element guide portion 4 </ b> A that protrudes from the pressing portion main body 77 only in one of the left and right directions.

As shown in FIGS. 16 to 18, the pressing portion main body 77 has a plate shape having the same thickness as the supported portion main body 72 (dimension in the vertical direction), and has a substantially rectangular shape in plan view. . The pressing portion main body 77 has a first pressing surface 77a and a second side surface 77b that face the width direction (left and right direction) separately, and a first pressing member that faces the vertical direction separately and connects the first side surface 77a and the second side surface 77b. A surface 77c and a second pressing surface 77d are provided. The first pressing surface 77c and the second pressing surface 77d are surfaces that connect the upper sides and the lower sides of the first side surface 77a and the second side surface 77b. In addition, the first pressing surface 77c and the second pressing surface 77d are configured such that one of the first pressing surface 77c and the second pressing surface 77d is rotated downward by the supported member 71, and the sewing product 9 is pressed. The pressing portion main body 77 includes a first side surface 77a, a second side surface 77b, a front surface 77e and a rear surface 77f surrounded by four sides by a first pressing surface 77c and a second pressing surface 77d. Needle passing portions 77p penetrating in the vertical direction are formed in the left and right symmetrical positions on the front portions (on the supported member 71 side) of the first side surface 77a and the second side surface 77b. The needle passing portion 77p has a shape in which the first side surface 77a and the second side surface 77b are each cut into a semicircular arc shape when viewed from above.
Hereinafter, for convenience of explanation, when distinguishing the first side surface 77a and the second side surface 77b, or when distinguishing between the first pressing surface 77c and the second pressing surface 77d, the left side surface in the reference state of the pressing member 76 will be described. The first side surface 77a, the right side surface is referred to as a second side surface 77b, the lower surface is referred to as a first pressing surface 77c, and the upper surface is referred to as a second pressing surface 77d. The reference state is a state in which a later-described guide groove 42a of the element guide portion 4A opens downward.

  Further, the upper and lower surfaces of the pressing portion main body 77 are horizontal surfaces. However, the rear portions of the upper and lower surfaces are both inclined surfaces toward the middle portion in the vertical direction as they go to the rear end. Further, the front surface 77e of the pressing portion main body 77 is a vertical surface parallel to the left-right direction and parallel to the up-down direction. An insertion hole 77h for inserting the coupling shaft 75 is formed in the front surface 77e of the pressing portion main body 77 at the center in the left-right direction and the vertical direction. On the other hand, the rear surface of the supported portion main body 72 is a flat surface in contact with the front surface 77 e of the pressing portion main body 77. Further, another insertion hole 72 h corresponding to the insertion hole 77 h of the pressing portion main body 77 is formed so as to penetrate the front and rear surfaces of the supported portion main body 72. Then, a bolt as a connecting shaft 75 is inserted into the insertion hole 72h (fiddle hole) of the supported portion main body 72 and the insertion hole 77h (female screw hole) of the holding portion main body 77, and the bolt 75 is inserted into the insertion hole of the holding portion main body 77. The holding portion main body 77 is rotatably connected to the supported member 71 by being screwed to 77h.

The pressing portion main body 77 and the supported portion main body 72 that are connected in this way are as follows in the left-right direction. In the reference state of the pressing portion main body 77, the first side surface 77a protrudes to the left with respect to the left side surface (reference surface 72a) of the supported portion main body 72 of the supported member 71 (see FIG. 14), and the second side surface. 77b also protrudes to the right with respect to the right side surface of the supported body 72. The protrusion length of the left side surface of the pressing portion main body 77 with respect to the left side surface of the supported portion main body 72 is the pressing portion main body around the connecting shaft 75 in the reference state (the state in which the element row 93 is guided). It is constant in any state in which 77 is rotated 180 degrees (a state in which the element row 93 is not guided).
The upper and lower surfaces of the pressing portion main body 77 and the supported portion main body 72 are both in the reference state of the pressing member 76 (the state in which the element row 93 is guided) and in the direction in which the element row 93 is not guided. , Will be flush. Incidentally, as shown in FIG. 21, in a state in which the element row 93 is not guided, the first side surface 77a is the right side surface, the second side surface 77b is the left side surface, the first pressing surface 77c is the upper surface, and the second pressing surface 77d is the lower surface. Become.

  The element guide portion 4A protrudes leftward from the first side surface 77a of the pressing portion main body 77 on the rear side of the portion where the needle hole 77p is formed. When viewed in plan, the rear portion of the element guide portion 4A is inclined so that the overhang length gradually increases from the rear end toward the front. Similarly to the guide main body 42 of the element guide 4 of the first embodiment, the element guide portion 4A has a U-shape that opens downward and is formed integrally with the first side surface 77a. The inner wall 43 has substantially the same thickness as the inner wall 43, the outer wall 44 is provided on the left side of the inner wall 43, and the upper wall 45 connects the inner wall 43 and the upper end of the outer wall 44. The upper surface of the upper base 45, that is, the upper surface of the element guide portion 4A is formed flush with the second pressing surface 77d. Further, the lower surface of the outer wall 44, that is, the lower surface of the element guide portion 4A is aligned with a height that is flush with the first pressing surface 77c. A U-shaped inner surface formed by the inner wall 43, the outer wall 44, and the upper bottom 45 serves as a guide groove 42a. The guide groove 42a is formed by an inner inner wall surface 43a and an outer inner wall surface 44a that face in the left-right direction, and an upper bottom surface 45a that connects the upper ends of the inner inner wall surface 43a and the outer inner wall surface 44a. The inner inner wall surface 43a and the outer inner wall surface 44a are parallel and are inclined to the left as they go upward.

  As shown in FIGS. 15 and 18, the second lock mechanism 8 operates the elastic member 85, the link device 80 to which the restoring force of the elastic member 85 is applied, and the link device 80 against the restoring force of the elastic member 85. And an operation unit 86 that holds the foot 7 in a certain posture (an posture in which the lower surface of the foot 7 is a horizontal surface) and restrains the pressing portion main body 77 so as not to rotate.

  The link device 80 includes a plurality of links 81, 82, 83 and a pin joint 89 that connects the links 81, 82, 83, and the like. More specifically, the link device 80 is a first link 81 extending in the front-rear direction in the reference state of the presser body 77 and connects the rear part in the front-rear direction with the pin joint 89 to the shank 2A above the main shaft 5. A second link 82 that extends in the up-down direction, and a second link 82 that is connected to an intermediate portion in the up-down direction by a pin joint 89 at a portion that extends forward of the first link 81, The third link 83 extends in the front-rear direction, and the third link 83 is connected to the rear portion in the front-rear direction by a pin joint 89 at the lower portion of the second link 82.

  In the example shown in the figure, the pin joint 89 is composed of a pin (not shown) having a left-right direction as an axial direction and a washer (not shown) having a C-shaped spring property, and is formed at both ends of the pin. A washer is fitted into an annular groove. Since the outer diameter of the washer is larger than that of the pin, the pin cannot be removed from the member into which the pin itself is inserted.

  The first link 81 has a U-shape that opens rearward in plan view, extends in the front-rear direction and faces the left and right sides, and the front end portions of the pair of side brackets 81a, 81a. It is comprised from the front bracket 81b which joins each other. The rear end portions of the pair of side brackets 81a and 81a are arranged so as to sandwich the left and right side surfaces of the lower portion of the shank 2A, and are horizontally connected to the shank 2A by a pin joint 89.

  The second link 82 has a U-shape that opens downward when viewed from the front, and extends in the vertical direction and faces the left and right directions, and a pair of side arms 82a and 82a. It is comprised from the upper arm 82b which joins each other. The vertical intermediate portions of the pair of side arms 82a and 82a are arranged so as to be sandwiched between the pair of side brackets 81a and 81a of the first link 81, and are horizontally connected to the pair of side brackets 81a and 81a by the pin joint 89. Connected.

  The third link 83 has an elongated plate shape extending in the front-rear direction, and has an upper surface that is lowered in a step shape at the rear end. That is, the third link 83 includes an elongated plate-like third link main body 83a and a claw 83b that protrudes rearward from the lower portion of the rear surface of the third link main body 83a, and the lower surfaces of the third link main body 83a and the claw 83b are provided. The rear surface of the third link 83 is a step on the upper side of the claw 83b. And the front end part of the 3rd link 83 is arrange | positioned so that it may be pinched | interposed between the lower end part of a pair of side arms 82a and 82a of the 2nd link 82, and it may be horizontal with respect to a pair of side arms 82a and 82a with the pin joint 89. Connected.

  The third link 83 is provided on the upper surface of the supported body 72 so as to be slidable back and forth. More specifically, as described above, the left and right supported plates 73 and 73 are disposed inside the left and right support plates 26 and 26 in order to connect the foot 7 to the shank 2A so as to be swingable by the main shaft 5. There is a space 26s for the third link between the left and right support plates 26,26. The space 26 s for the third link is covered with the top plate 25 of the shank 2 </ b> A, and the lower part is covered with the supported portion main body 72. Further, the space 26s for the third link has an opening at the front thereof and a main shaft 5 disposed at an intermediate portion in the vertical direction at the rear thereof. The third link 83 is accommodated in the third link space 26s so as to be able to reciprocate in the front-rear direction from the rear, and the rear portion of the third link body 83a and the claw 83b are located on the upper surface of the supported body 72 of the supported member 71. They overlap and are sandwiched between the left and right support plates 26, 26 of the supported member 71. Moreover, the claw 83b is provided so as to be movable in the front-rear direction while being sandwiched between the upper and lower sides of the main shaft 5 and the supported body 72. When the claw 83b is moved rearward, the step of the third link main body 83a is in contact with the front of the main shaft 5, and the tip of the claw 83b is arranged on the presser main body 77, and the presser main body is arranged. 77 is held non-rotatable.

  A compression coil spring as an elastic member 85 is accommodated between the upper end portion of the second link 82 and the shank 2A in order to hold the presser body 77 in a non-rotatable manner and stabilize the foot 7 in a constant posture. . More specifically, housing holes 82h and 23h are formed on the opposing surfaces of the upper arm 82b of the second link 82 and the rear plate 23 of the shank 2A so that the compression coil spring 85 is compressed. The front end portion and the rear end portion are accommodated in the pair of accommodation holes 82h and 23h. The housing hole 23h of the shank 2A is a hole (circular hole) corresponding to the shape of the compression coil spring 85, and the rear end portion of the compression coil spring 85 is positioned and accommodated. On the other hand, the receiving hole 82h of the upper arm 82b is a long hole whose longitudinal direction is longer than that of the left and right direction and whose longitudinal direction is longer than that of the left and right direction, and whose horizontal dimension corresponds to the diameter of the compression coil spring 85. The vertical dimension is longer than the diameter of the compression coil spring 85. And the accommodation hole 82h of the upper arm 82b accommodates the front end portion of the compression coil spring 85 in a state where there is a gap in the vertical direction while positioning the front end portion of the compression coil spring 85 in the left-right direction in the basic state of the pressing portion main body 77. . The second link 82 is swung using this gap.

  The operation portion 86 projects from the front surface of the upper end portion (upper arm 82 b) of the second link 82, and includes an operation bolt 87 and a nut 88. In order to attach the operation bolt 87, a female screw hole 82p is formed in the front surface of the upper end portion of the upper arm 82b, and the female screw hole 82p passes through the accommodation hole 82h of the second link 82. The shaft portion of the operation bolt 87 is screwed into the nut 88 and the female screw hole 82p so that the nut 88 and the female screw hole 82p are in pressure contact with each other, and the front of the operation bolt 87 with respect to the upper arm 82b. It is fixed so that the amount of protrusion is not changed. The head of the operation bolt 87 is positioned at a certain position in front of the second link 82, more specifically in front of the front surface of the shank 2A, so that the operation bolt 87 can be easily operated.

The sewing foot 1A of the second embodiment described above uses the second lock mechanism 8 as follows.
When the direction of the element guide 4 is not changed, the operation unit 86 is not operated. In this case, as shown in FIG. 18, the restoring force of the compression coil spring 85 acts, and the upper part of the second link 82 is pushed forward, whereas the lower part of the second link 82 is pushed backward. Accordingly, the third link 83 is pushed rearward, the rear surface of the third link main body 83 a collides with the main shaft 5, and the front portion (rear portion) of the claw 83 b overlaps the pressing portion main body 77. Thus, the third link 83 (the third link body 83a and the claw 83b) is held immovable by the restoring force of the compression coil spring 85. The supported portion main body 72 is in surface contact under the immovable third link main body 83a, and the pressing portion main body 77 is in surface contact under the immovable claw 83b. Therefore, the pressing portion main body 77 cannot be rotated around the connecting shaft 75. Further, since the third link 83 is held immovably by the restoring force of the compression coil spring 85, the foot 7 is restrained from swinging around the main shaft 5 and maintains its posture in the horizontal direction unless an external force is applied. To do.

When changing the direction of the element guide 4, the operation unit 86 is operated. In this case, as shown in FIG. 19, the operating portion 86 is pushed backward against the restoring force of the compression coil spring 85, whereby the upper portion of the second link 82 is pushed backward, and conversely the lower portion of the second link 82 is pushed forward. Is pushed into. Accordingly, the third link 83 is pushed forward, the rear surface of the third link main body 83a is separated from the main shaft 5, the tip portion (rear portion) of the claw 83b is retracted from the front end of the pressing portion main body 77, and the claw 83b is covered. While being sandwiched between the upper and lower portions of the support portion main body 72 and the main shaft 5, the support portion main body 72 is disposed only on the supported portion main body 72. That is, the pressing portion main body 77 is free to rotate, and the operator changes the state in which the element guide portion 4A is directed downward or the element guide portion 4A is directed upward.
When the sewing product 9 is the hidden slide fastener 91 and the fabric 95, and the sewing is performed while guiding the element row 93, the guide groove 42a of the element guide portion 4A is opened downward as shown in FIGS. To do. In this case, the first pressing surface 77 c on the opening side of the guide groove 42 a becomes the lower surface of the pressing portion main body 77 and presses the sewing product 9. Further, when the element row 93 is simply sewn without being guided, the guide groove 42a of the element guide portion 4A is opened upward as shown in FIGS. In this case, the second pressing surface 77d (upper surface in the reference state) opposite to the opening side of the guide groove 42a becomes the lower surface of the pressing portion main body 77 and presses the sewing product 9. In either case, the surface of the foot 7 that holds the sewing product is a flat surface, and the sewing can be performed stably.

  The present invention is not limited to the above-described embodiment, and can be modified as appropriate without departing from the spirit of the present invention. For example, in the sewing machine foot 1 of the first embodiment, the element guide 4 that is a part of the foot 7 is provided so as to be displaceable between the first position and the second position. Although it is provided so as to be movable in the left-right direction, the present invention is not limited to this, and for example, the element guide 4 may be rotatably connected to the pressing portion 3 </ b> A by a shaft member whose axial direction is the front-rear direction.

1, 1A sewing foot 2, 2A shank 21 insertion hole 22 front plate 23 rear plate 23h receiving hole 24 rear plate body 25 top plate 26 support plate 26s space for third link 27 side plate 3 foot 3A presser 3B bolt 3U upper presser Part 3D Lower presser part 31 Supported part 32 Presser part main body 32U Upper plate 32D Lower plate 32c Notch part 32h Needle passage part (needle hole)
33 Step portion 34 Positioning groove 35 Front side surface (second surface, second guide surface, reference surface)
36 Rear side surface (first surface, first guide surface)
37 Guide passage portion 37a Guide groove 38 Storage space 4 Element guide 4A Element guide portion 41 Slide portion 41a Recess 42 Guide body portion 42a Guide groove 43 Inner wall 43a Inner inner wall surface 44 Outer wall 44a Outer inner wall surface 44s Outer outer wall surface (third surface, Third guide surface)
45 Upper Bottom 45a Upper Bottom 46 Stopper 5 Spindle 6 First Locking Mechanism 61 Lever 61a Convex 62 Elastic Member (Tensile Coil Spring)
7 foot 71 supported member 72 supported body 72a reference surface 72h insertion hole 73 supported plate 75 connecting shaft (bolt)
76 Presser member 77 Presser body 77a First side surface 77b Second side surface 77c First presser surface (lower surface)
77d Second holding surface (upper surface)
77e Front 77f Rear 77h Insertion hole 77p Needle thread (needle hole)
8 Second lock mechanism 80 Link device 81 First link 81a Side bracket 81b Front bracket 82 Second link 82a Side arm 82b Upper arm 82h Housing hole 82p Female thread 83 Third link 83a Third link body 83b Claw 85 Elastic member ( Compression coil spring)
86 Operation part 87 Operation bolt 88 Nut 89 Pin joint 9 Sewing thing 91 Hidden slide fastener 92 Fastener tape 93 Element row 95 Fabric M1 Sewing needle M2 Sewing machine stand

Claims (9)

A shank (2) attached to a presser bar of the sewing machine, and a foot (3) supported by the shank (2),
The foot (3) is supported by the shank (2) and presses the sewing product (9), and a pressing fastener (3A) and a slide fastener element row (93) which is one of the sewing products (9) The element guide (4) is formed with a guide groove (42a) for guiding the element, and is provided so as to be displaceable in a first position and a second position with respect to the pressing portion (3A). )
The first position is a guide position of the element row (93), and in this case, the guide groove (42a) has a width of the pressing portion (3A) with respect to one side surface of the pressing portion (3A). Is a position that protrudes outward in the direction,
The second position is a non-guide position of the element row (93). In this case, the guide groove (42a) is positioned inward in the width direction with respect to the one side surface of the pressing portion (3A). Sewing machine foot characterized by   The sewing machine foot according to claim 1, wherein the element guide (4) is provided so as to be movable in the width direction with respect to the pressing portion (3A).   The sewing foot according to claim 1 or 2, wherein the pressing portion (3A) has a needle threading portion (32h) formed on the one side surface. The pressing portion (3A) includes a guide passage portion (37) for guiding the element guide (4), and a feeding direction of the sewing product (9) relative to the needle passing portion (32h) of the one side surface. The first surface (36) extending in the opposite direction, the second surface (35) extending in the feeding direction from the needle passage portion (32h) of the one side surface, and the element guide (4) A guide passage portion (37) for guiding, and an accommodation space (38) communicating with the guide passage portion (37) between the first surface (36) and the needle passage portion (32h),
The element guide (4) is movable along the guide passage portion (37), a slide portion (41), projects from the slide portion (41) in the width direction, and enters and exits the accommodation space (38). Sewing foot according to claim 3, characterized in that it comprises a possible guide body (42). In the first position of the element guide (4), the guide main body (42) protrudes from the accommodation space (38), and the first surface (36) of the pressing portion (3A) and the The inner inner wall surface (43a) of the guide groove (42a) is the same plane continuous in the feeding direction,
In the second position of the element guide (4), the guide main body (42) is stored in the storage space (38), and the first surface (36) and the outer side of the guide main body (42). The sewing machine foot according to claim 4, wherein the outer wall surface (44s) is the same plane continuous in the feeding direction. A main shaft (5) for swingably supporting the pressing portion (3A) of the foot (3) to the lower end of the shank (2), and a swing of the foot (3) about the main shaft (5). A first locking mechanism (6) for restraining movement and restraining movement of the element guide (4) relative to the pressing portion (3A);
The first lock mechanism (6) is attached between a lever (61) supported by the main shaft (5) so as to be swingable, and one end of the lever (61) and the shank (2). An elastic member (62),
The other end portion of the lever (61) to which a restoring force of the elastic member (62) is applied presses the element guide (4) against the pressing portion (3A). Sewing machine foot described in Crab. A shank (2A) attached to a presser bar of the sewing machine, and a foot (7) supported by the shank (2A),
The foot (7) can be rotated with the supported member (71) supported by the shank (2A) and the feed direction of the sewing product (9) with respect to the supported member (71) as the axial direction. A pressing member (76) pivotally supported by
The pressing member (76) is a guide groove (42a) for guiding a pressing portion main body (77) for pressing the sewing product (9) and an element row (93) of a slide fastener which is one of the sewing products (9). ) Formed element guide portion (4A),
The pressing portion main body (77) has a first side surface (77a) and a second side surface (77b) which are separately oriented in the width direction, and a first side surface (77a) and the second side surface (which are separately oriented in the vertical direction. 77b) including a first pressing surface (77c) and a second pressing surface (77d),
The element guide part (4A) projects in the width direction only from the first side surface (77a) of the first side surface (77a) and the second side surface (77b),
A sewing machine foot characterized in that the first pressing surface (77c) and the second pressing surface (77d) press the sewing product (9) when they become the lower surface of the pressing portion main body (77). When the guide groove (42a) opens downward, the first pressing surface (77c) becomes the lower surface of the pressing portion main body (77),
The sewing machine foot according to claim 7, wherein when the guide groove (42a) opens upward, the second pressing surface (77d) becomes a lower surface of the pressing portion main body (77). The supported member (71) and the pressing member (76) are connected by a connecting shaft (75) whose axial direction is the feeding direction,
The sewing machine foot according to claim 8, further comprising a second lock mechanism (8) for restraining the rotation of the pressing member (76) about the connecting shaft (75).

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