JP2004033514A - Pressor foot for sewing machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a pressor foot for sewing machine that can guide the sewing for smooth operation of opening and closing a fastener without biting the workpiece. <P>SOLUTION: A slide fastener F and a cloth E are stacked, one on top of the other, and fed into a location of a sewing machine (drawing not shown) where its needle drops and a meshing member Fa of the slide fastener F is inserted and set to a guide slot 3b of a pressor foot 3 that composes the sewing machine gathering foot 1. The sewing machine is activated and while feeding the slide fastener F and the cloth E to the workpiece feeding direction the interlocking member Fa of the slide fastener F is guided approximately parallel to the workpiece feeding direction along the guide slot 3b of the pressor foot 3, and the sewing is carried out by guiding the sewing operation to a position in proximity or spaced apart at predetermined intervals against the location where a needle B drops. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a presser foot for a sewing machine used for sewing a fastener such as a slide fastener or a concealed fastener to a sewing material such as a thin cloth or a thick cloth with a sewing machine.
[0002]
[Prior art]
Conventionally, when the above-mentioned slide fastener is sewn, for example, the sewn portions of the slide fastener and the fabric are vertically overlapped and sent to a needle drop position of a sewing machine (not shown), and the overlap portion of the slide fastener and the fabric is There is a method in which the slide fastener and the fabric are sewn along an occlusal attached to a sewn portion of the slide fastener while being transported in the feed direction of the workpiece.
[0003]
[Problems to be solved by the invention]
However, when the above-mentioned slide fastener is sewn on a thick cloth, if the needle drop position of the sewing machine needle is set close to the bite attached to the sewn part of the slide fastener, the sewn part of the cloth is sewn. When folded back to the back side, as shown in FIG. 9, the folded portion of the fabric E has a folded portion of the fabric greatly protruding from the slider Fb to the opposite portion of the occlusal element Fa. Of the slide fastener F cannot be smoothly opened and closed. In addition, if the slider Fb is forcibly opened and closed, the biting portion of the fabric may be broken or the slide fastener F may be damaged.
[0004]
SUMMARY OF THE INVENTION In view of the above problems, the present invention bites a sewn object by guiding an occlusal of a fastener to a position close to and away from a needle drop position by a locking portion of a presser foot at a predetermined interval. It is another object of the present invention to provide a presser foot for a sewing machine that can be sewn so that the fastener can be opened and closed smoothly.
[0005]
[Means for Solving the Problems]
According to the present invention, at the time of sewing by a sewing machine, a fastener supplied to a needle drop position of a sewing needle constituting the sewing machine and a presser foot for a sewing machine that presses a sewn portion of a sewing object in a vertically overlapped state. The presser foot for the sewing machine comprises a presser body attached to a presser bar constituting the sewing machine, and a presser foot attached to the presser body. The sewing machine needle is provided on the presser foot. A needle dropper that allows vertical movement of the sewing machine and movement of the sewing needle in a direction substantially perpendicular to the sewing workpiece feed direction, and an occlusal element attached to the sewn part of the fastener are locked, and the occlusal element is covered. An engaging portion is provided for guiding in a direction substantially parallel to the sewing product feed direction, and the presser foot attached to the presser foot main body is substantially orthogonal to the sewing object feed direction based on the needle drop position. direction Characterized in that it is a sewing machine presser foot provided to be movable against.
[0006]
The above-mentioned fastener is formed of a fastener such as a slide fastener or a concealed fastener, and the fastener can be formed of a single or composite material such as a metal or a plastic. Further, the sewing object can be constituted by clothes such as trousers and skirts and cloths used for sewing the clothes. Further, the locking portion can be constituted by, for example, a groove, a concave portion, a locking member, or the like. Further, the needle drop portion can be constituted by, for example, a groove, a hole, an opening, or the like. Further, the concave and convex portions can be constituted by, for example, protrusions, grooves, ants, dovetail grooves, and the like. That is, the presser foot of the presser foot for the sewing machine is covered with reference to the needle drop position of the sewing needle constituting the sewing machine. It moves in the direction substantially perpendicular to the feed direction of the sewn product, and moves the fastener bite (for example, worm teeth or teeth) to the needle drop position by the locking portion of the presser foot substantially in accordance with the thickness of the sewn product. It is adjusted so that it is guided to a position close to and away from the predetermined distance. The sewing machine is driven to transfer the fastener and the work to be sewn in the feed direction of the work, and the bite of the fastener is locked to the locking portion of the presser foot so as to be substantially parallel to the feed direction of the work. And sew while guiding the fastener bite to a position close to or away from the needle drop position at a predetermined interval.
[0007]
As an embodiment, a concave portion and a convex portion which are movably locked in a direction substantially orthogonal to the sewing object feeding direction can be provided on the opposing surfaces of the presser foot main body and the presser foot. In addition, a scale serving as a guide when setting the moving position of the presser foot is set on the presser foot main body and / or the presser foot in a direction substantially orthogonal to the sewing object feed direction based on the needle drop position. It can be provided at intervals. Further, the needle dropping portion and the locking portion can be provided symmetrically with respect to the center of the front end side of the presser foot.
[0008]
[Action and effect]
According to the present invention, the presser foot of the presser foot for the sewing machine is moved in a direction substantially orthogonal to the feed direction of the workpiece, and the bite of the fastener is moved relative to the needle drop position substantially in accordance with the thickness of the workpiece. Since the sewing guide is provided at positions close to and separated from each other by a predetermined distance, sewing can be performed so that the fastener can be smoothly opened and closed without biting the sewing object. In addition, the sewing positions of the fastener and the sewn product are hard to be displaced, and the sewn material can be sewn substantially straight along the feed direction of the sewn product.
[0009]
【Example】
An embodiment of the present invention will be described below in detail with reference to the drawings.
The drawing shows a presser foot (or fastener presser foot) for a sewing machine used for a sewing operation of sewing a metal or resin slide fastener on a cloth as an example of a sewing object with a sewing machine. 2 and 3, the presser foot 1 for the sewing machine has a presser foot body 2, a presser foot 3, and the presser foot main body 2 and the presser foot 3 in a feed direction of a sewing object (arrows shown in FIG. 6). And a screw member 4 that is movably fixed in the left-right direction substantially orthogonal to the above. The presser foot main body 2, the presser foot 3, and the screw member 4 are made of, for example, a single metal or plastic material. It is formed of a composite material.
[0010]
The presser foot main body 2 described above mounts a substantially concave mounting portion 2a when viewed from a plane in which the lower end of a presser bar A constituting a sewing machine (not shown) is inserted in a substantially vertical direction and is allowed to be inserted. And a substantially upside-down U-shaped groove 2b as viewed from the side surface where the screw member 5 is allowed to be inserted in the substantially horizontal direction, is formed in the upper end side surface portion of the mounting portion 2a. That is, after the lower end of the holding rod A is inserted into the mounting portion 2a from above or from the side, the screw member 5 is screwed and screwed into the lower end of the holding rod A via the groove 2b. Then, the presser foot body 2 is integrally fixed to the presser bar A.
[0011]
In addition, a substantially convex protrusion 2c as viewed from the side face is formed continuously in a direction substantially perpendicular to the sewing object feeding direction with respect to a lower end side smooth surface of the presser foot main body 2 in opposition to a groove 3c described later. A screw hole 2d, into which a screw member 4 described later is screwed and screwed, is formed in a central portion on the lower surface side of the projection 2c in communication with a hole 2d described later.
[0012]
At the lower end of the front surface of the presser foot main body 2, a scale 2 e serving as a guide when setting the moving position of the presser foot 3 is set based on the needle drop position immediately below the sewing machine needle B shown in FIG. They are provided at predetermined intervals in the left-right direction substantially perpendicular to the feed direction. For example, a sticker on which the scale 2e is printed is attached, or the scale 2e is directly engraved on the presser foot body 2. In addition, the scale 2e may be provided on the upper surface portion on the rear end side of the presser foot 3.
[0013]
The presser foot 3 is formed in a size and a shape suitable for pressing the sewn portion of the slide fastener F and the sewn portion of the fabric E in a vertically overlapped state, and the pressing surface of the presser foot 3 is formed. , The slide fastener F and the fabric E are formed into a smooth surface and shape that allows pressing while being vertically overlapped.
[0014]
Further, the needle drop groove 3a, which is substantially concave when viewed from a plane in which the vertical movement of the sewing machine needle B and the left and right movement of the sewing machine needle B in a direction substantially orthogonal to the sewing object feed direction, is provided on the front end side of the presser foot 3. The needle drop groove 3a is formed at the center of the upper surface, and the left end of the needle drop groove 3a is opened to the left direction substantially orthogonally to the direction of feeding the workpiece when viewed from the front.
[0015]
The guide groove 3b, in which the articulation element Fa attached to the sewing portion of the slide fastener F is locked, is connected to the lower left side of the presser foot 3 (the guide surface of the articulation element Fa). It is formed on the left side of the front end side of the drop groove 3a, and is formed in a direction substantially parallel to the sewing object feeding direction. Further, the occluder Fa attached to the sewing portion of the slide fastener F guides the inner surface of the guide groove 3b and the left side of the presser foot 3 as viewed from the front continuous with the guide groove 3b in the feed direction of the workpiece. Formed in a smooth surface and shape, and the inclination of the bite Fa is ensured.
[0016]
In addition, a substantially concave groove portion 3c as viewed from the side face is formed continuously with the projection 2c in the direction substantially orthogonal to the sewing object feeding direction with respect to the center of the upper surface on the rear end side of the presser foot 3. A horizontally long hole 3d through which the screw member 3 is inserted in a substantially vertical direction is formed at the center on the upper surface side of the groove 3c in communication with the screw hole 2d. That is, the protrusion 2c of the presser foot body 2 and the groove 3c of the presser foot 3 match each other, and the screw member 5 is inserted into the screw hole 2b of the presser foot body 2 through the hole 3d of the presser foot 3. Then, the presser foot main body 2 and the presser foot 3 are slidably attached to the right and left direction substantially orthogonal to the sewing object feed direction.
[0017]
The above-described hole 3d is provided so that the occlusal element Fa attached to the sewing part of the slide fastener F can be positioned at a position close to the needle drop position of the sewing needle B at a predetermined interval, and at a needle drop position of the sewing needle B. The presser foot 3 is formed in a horizontally long shape that is allowed to move in a left-right direction substantially orthogonal to the sewing object feed direction between the position and the position separated by a predetermined distance. Further, the above-described protrusion 2c may be formed on the presser foot 3 side, and the groove 3c may be formed on the presser foot main body 2 side.
[0018]
The illustrated embodiment is configured as described above, and a method of sewing the slide fastener F with the sewing machine presser foot 1 will be described below.
[0019]
First, before starting the sewing operation, the screw member 4 for fixing the presser foot 3 is turned in a loosening direction by a turning operation tool (not shown) to release the fixing, and the presser foot 3 is moved to the sewing machine needle B. Is moved by a desired amount in the left-right direction substantially orthogonal to the sewing object feed direction with respect to the needle drop position, and the presser foot 3 is moved to the thickness of the cloth E based on the scale 2 e provided on the presser foot main body 2. Is adjusted to a predetermined position substantially corresponding to.
[0020]
That is, when the slide fastener F is sewn on the thick cloth E, as shown in FIG. 4, the presser foot 3 is moved to the left direction (indicated by an arrow in the drawing) substantially perpendicular to the workpiece feed direction when viewed from the front. , And the bite Fa of the slide fastener F is set so as to be guided by the guide groove 3b of the presser foot 3 to a position separated from the needle drop position of the sewing machine needle B at a predetermined interval.
[0021]
On the other hand, when sewing on a thin cloth E, as shown in FIG. 5, the presser foot 3 is moved in a right direction (direction indicated by an arrow in the figure) which is substantially perpendicular to the feed direction of the workpiece when viewed from the front. The bite Fa of the slide fastener F is set to be guided by the guide groove 3b of the presser foot 3 to a position close to the needle drop position of the sewing machine needle B at a predetermined interval. Thereafter, the screw member 7 is turned in the tightening direction by a turning operation tool (not shown), so that the presser foot 3 is fixed to the presser foot main body 2 so as to be immovable.
[0022]
Next, the sewing machine presser foot 1 attached to the presser bar A is manually fed to the needle drop position of the sewing machine (not shown) while the sewn portions of the slide fastener F and the fabric E are vertically overlapped. After vertically descending, the presser foot 3 is pressed against the upper surface of the sewn portion of the slide fastener F supplied to the needle drop position immediately below the sewing machine needle B, and the lower surface of the sewn portion of the fabric E is projected to the upper surface of the needle plate C. The jaws Fa attached to the sewn portion of the slide fastener F are inserted into the guide groove 3b formed in the left edge of the presser foot 3 while being pressed and held against the feed dog D and set.
[0023]
Next, as shown in FIGS. 6 and 7, the sewing machine (not shown) is driven, and the sewing operation is performed by the feed operation of the feed dog D while the sewn portions of the slide fastener F and the fabric E are vertically overlapped. It is transported in the direction of the object (arrow direction). The sewing machine needle B is moved up and down while guiding the bite Fa of the slide fastener F to a position close to or away from the needle drop position of the sewing machine needle B at a predetermined interval by the guide groove 3b of the presser foot 3. , The slide fastener F and the fabric E are integrally sewn.
[0024]
As described above, the presser foot 3 that constitutes the presser foot 1 for the sewing machine is moved in a direction substantially perpendicular to the direction in which the workpiece is fed, and the bite Fa of the slide fastener F is moved by the needle in accordance with the thickness of the cloth E. Since the sewing guide is provided at a position close to and separated from the falling position by a predetermined distance, sewing can be performed so that the opening and closing operation of the slide fastener F can be smoothly performed without biting the cloth E. Further, the sewing positions of the slide fastener F and the fabric E are hardly displaced, and the slide fastener F and the cloth E can be sewn substantially straight along the workpiece feed direction, so that the sewing can be finished in a favorable state.
[0025]
Moreover, even when the bite Fa of the slide fastener F is close to the needle drop position, if the cloth E is thin, when the sewn portion of the cloth E is folded back, the amount of protrusion of the slider Fb on the traveling path is small, Since the folded portion of the fabric E does not bite, when the thin fabric E is sewn, the bite Fa of the slide fastener F can be set at a position close to the needle drop position at a predetermined interval.
[0026]
On the other hand, when the cloth E is thick, when the sewn portion of the cloth E is folded back, the folded part greatly projects to the meshing portion of the occlusal element Fa, and the folded portion of the cloth E engages the occlusal element Fa and the slider Fb. When sewing a thick cloth E, it is preferable that the occlusal element Fa of the slide fastener F be set at a predetermined distance from the needle drop position.
[0027]
FIG. 8 shows another example of the sewing machine presser foot 1 in which the needle drop groove 3a and the guide groove 3b are formed symmetrically with respect to the center of the front end side of the presser foot 3, and the left sewing portion of the slide fastener F is shown. Is guided along the left guide groove 3b of the presser foot 3 in a direction substantially parallel to the feed direction of the workpiece, and the left bite Fa of the slide fastener F is moved with respect to the needle drop position. A sewing guide is provided at a position close to or at a predetermined interval.
[0028]
In addition, the articulator Fa attached to the right sewn portion of the slide fastener F is guided along the right guide groove 3b of the presser foot 3 in a direction substantially parallel to the sewing object feeding direction, and the right occlusal engagement of the slide fastener F is performed. Since the child Fa is guided by sewing at a position close to or separated from the needle drop position by a predetermined distance, substantially the same operation and effect as in the above-described embodiment can be obtained.
[0029]
Further, the left and right articulators Fa of the slide fastener F are guided along the left and right guide grooves 3b of the presser foot 3 in a direction substantially parallel to the sewing object feeding direction, and the left and right articulators Fa of the slide fastener F are moved to the fabric E. Can be sewn almost simultaneously to the left and right sewn portions.
[0030]
The present invention is not limited only to the configuration of the above embodiment.
The pressing surface of the presser foot 3 and the guide surface of the guide groove 3b are coated with a sliding member having low contact resistance such as Teflon resin or silicon resin, or a sliding member formed in a sheet or film shape. You may stick and fix.
[0031]
Further, as a connecting method instead of the screw member 4, for example, a magnet, a double-sided adhesive tape, a hook-and-loop fastener, or the like is used, or one or both of the presser foot body 2 and the presser foot 3 are excited and attracted to each other by their magnetic force. It may be fixed.
[Brief description of the drawings]
FIG. 1 is a perspective view showing a presser foot for a sewing machine.
FIG. 2 is an essential part cross-sectional view showing a mounting state of a presser foot main body and a presser foot.
FIG. 3 is a perspective view showing a separated state of a presser foot for a sewing machine.
FIG. 4 is a front view showing an example in which the presser foot is moved to the right and left when viewed from the front.
FIG. 5 is a front view showing an example in which the presser foot is moved to the left as viewed from the front.
FIG. 6 is a plan view showing a pressing state by a presser foot for the sewing machine.
FIG. 7 is a longitudinal sectional front view showing a sewing state of the slide fastener.
FIG. 8 is a perspective view showing another example of the presser foot for the sewing machine.
FIG. 9 is a longitudinal sectional front view showing a state in which the fabric is bitten.
[Explanation of symbols]
E: cloth F: slide fastener Fa: bite Fb: slider 1: sewing machine presser foot 2: presser foot body 2c: projection 2d: screw hole 2e: scale 3, presser foot 3a: needle drop groove 3b: guide groove 3c ... Groove 3d: Holes 4, 5: Screw member

Claims (4)

A sewing presser foot for pressing a fastener and a sewn portion of an object to be sewn in a vertically overlapped state at the time of sewing by a sewing machine, the fastener being supplied to a needle drop position of a sewing needle constituting the sewing machine,
The presser foot for the sewing machine, a presser foot body attached to a presser bar constituting the sewing machine, and a presser foot attached to the presser foot body,
A needle dropper that allows the presser foot to allow vertical movement of the sewing machine needle and movement of the sewing machine needle in a direction substantially orthogonal to a direction in which a sewing object is fed;
An occlusal attached to the sewn portion of the fastener is locked, and a locking portion for guiding the occlusal in a direction substantially parallel to the direction of feeding the workpiece is provided,
A presser foot for a sewing machine, wherein a presser foot attached to the presser foot body is provided so as to be movable in a direction substantially orthogonal to a sewing object feed direction with reference to the needle drop position. 2. A presser foot for a sewing machine according to claim 1, wherein a concave portion and a convex portion which are movably locked in a direction substantially perpendicular to the sewing object feeding direction are provided on the opposing surfaces of the presser foot body and the presser foot. . On the presser foot main body and / or the presser foot, a scale serving as a guide when setting the moving position of the presser foot is set at a predetermined interval with respect to a direction substantially perpendicular to the sewing object feeding direction with reference to the needle drop position. 3. The presser foot for a sewing machine according to claim 1, which is provided at a distance. 2. The presser foot for a sewing machine according to claim 1, wherein the needle drop section and the locking section are provided symmetrically with respect to a center of a front end side of the presser foot.

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