JPS6226074Y2 - - Google Patents

Description

[Detailed description of the invention] Technical field This invention relates to a fabric holding frame for a sewing machine, and more specifically, the invention relates to a fabric holding frame for a sewing machine, and more specifically, the feed dog and the presser foot work together to move the workpiece fabric at right angles to the swinging direction of the sewing needle. A household device that can embroider and sew various patterns such as desired letters (including alpha alphabets, numbers, etc.) and designs, especially long continuous patterns in the cloth feeding direction, onto the processed cloth by applying a feeding motion in the cloth feeding direction. For commercial sewing machines, a cloth holder is designed to hold the work cloth under tension in an appropriate and well-stretched state during the above-mentioned embroidery sewing, and to prevent the sewn pattern, etc. from being pinched by the frame and crushed and deformed. It's about frames.

Prior Art The cloth holding frame used in the sewing machine described above is different from that used in industrial sewing machines, and generally consists of an inner frame and an outer frame consisting of a rectangular frame having a rectangular opening along the cloth feeding direction. However, considering the ease of handling and the table area of the sewing machine, the dimensions of this fabric holding frame cannot be made too large; for example, the width is 40 to 60 mm, the length is 140 to
Around 160mm is considered reasonable. Therefore, the effective width of the opening, which is composed of the inner and outer frames and which can stretch and hold the required portion of the work cloth and which allows insertion of the presser foot of the sewing machine, is naturally limited. For this reason, in the embroidery stitching performed on processed cloth,
In cases where the target pattern or other pattern protrudes outside the effective aperture area mentioned above, in other words, the length from the beginning of the pattern to the end of the pattern, such as a pattern with a large number of characters or a long pattern or many consecutive characters, etc. is larger than the length in the cloth feeding direction in the effective opening area, after forming the embroidery pattern halfway with good separation, temporarily remove the cloth holding frame from the work cloth and shift the position of the work cloth, After resetting the inner frame and outer frame, the stitching is continued again.

For this reason, in the case of conventional cloth holding frames, in order to deal with cases where there are a large number of characters or patterns or other patterns that are long and continuous, as mentioned above, when resetting the fabric to be processed, the pattern that has already been formed is used. A part of the pattern, etc., is sandwiched between the inner and outer frames, causing the inconvenience of crushing and deforming the pattern, etc. That is, the 14th a.
As illustrated in the figure, in pattern P ₁ (generally referred to as a "message pattern") in which the letters "Congratulations on your birthday" are lined up at equal intervals, the length of the effective opening area of the cloth holding frame in the cloth feeding direction is The range in which the embroidery stitches can be made is limited by the presence of the presser foot facing into the fabric holding frame and the fabric holding frame.
After sewing the letters from ``...'' to ``U'', for example, in the middle, remove the fabric holding frame, shift the processed fabric, set it again, and then sew the letters ``Bi'' to ``U'' at the end. become. However, when resetting the cloth holding frame, the characters ``U'' and ``Yo'' formed earlier should be inserted between the inner and outer frames, especially between the mating abutment surfaces at the ends of both frames. There is a risk of getting caught. Further, as illustrated in Fig. 14b, even in the case of pattern _P2 in which a large number of "fish-shaped" patterns are consecutively arranged at equal intervals, when setting the cloth holding frame, as described above, A part of the pattern formed on the screen, for example, the third pattern, may get stuck. To avoid this, when setting the cloth holding frame,
It may be possible to change the spacing between each letter or pattern, but this is of course undesirable since it impairs the continuity of the pattern and the quality of the stitching.

As a result, the pattern obtained by stitching
This will deform or damage P ₁ and P ₂ . In addition, because the pattern is thicker than the processed fabric, the inner and outer frames cannot fit tightly into each other, making it impossible to hold the processed fabric in a tensioned state. This interferes with the sewing work and causes problems such as not being able to obtain a well-finished pattern.
Conventional cloth holding frames do not have an appropriate solution for dealing with this problem, and therefore, a cloth holding frame that solves this problem with a simple structure has been awaited.

Purpose The present invention has been proposed in view of the above-mentioned difficulties inherent in the conventional cloth holding frame and to solve these problems. That is, at the ends of the outer frame and the inner frame that are fitted to each other, a recess is formed in the fitting abutment surfaces of both frames to avoid the pattern etc. from getting caught;
This eliminates the pinching of patterns, etc. when setting the cloth holding frame against the work cloth, thereby preventing deformation and crushing of the patterns, etc., as well as ensuring that both the inner and outer frames are tightly fitted and abutted. The purpose of this invention is to spread and hold the work cloth properly and under tension, to enable good embroidery and sewing work, and to form a well-finished pattern.

Embodiments Next, the cloth holding frame according to the present invention will be described in detail below using preferred embodiments with reference to the accompanying drawings. The cloth holding frames shown in this embodiment are made of a synthetic resin (for example, ABS resin) that is relatively hard and has appropriate elasticity (elastic deformation and return to original shape characteristics), and is made of a second material having a substantially rectangular shape of the same size. The outer frame 10 shown in Fig. 5 and Fig. 6 -
It basically consists of an inner frame 12 shown in FIG. 10, and the fabric holding frame is placed on the table 16 of the sewing machine 14 shown in FIG. 1, which can perform pattern sewing as described at the beginning of this specification. Please use sewing needle 1 when using.
It is moved along the cloth feeding direction perpendicular to the swinging direction of 8. In FIG. 1, reference numeral 20 indicates a presser foot for the work cloth 22, and numeral 24 indicates a feed dog that cooperates with the presser foot 20 to impart a feed motion to the work cloth 22.

In the cloth holding frame according to this embodiment, the outer frame 1
0 is placed on the upper surface of the table 16 of the sewing machine 14 to sandwich the work cloth 22 from the lower surface during use, and is basically a substantially rectangular frame formed with uniform wall thickness as shown in the figure. This outer frame 10 is formed with a flat part 26 that presses the work cloth 22, and an opening 28 that fits into the outer periphery of the frame body of the inner frame 12, which will be described later, is bored in the longitudinal direction of the center of the frame. It is set up. The frame body is integrally formed with ribs 30 and 32 that come into contact with the sewing machine table 16 between the lower surface of its outer circumferential edge and the lower surface of the inner circumferential edge of the opening 28, thereby reinforcing the entire outer frame 10. At the same time, deformation in the longitudinal direction (warping, wavy deformation, etc.) is prevented. Further, by utilizing the characteristic that both long pieces 10a, 10a of this frame body can be appropriately elastically deformed inward and outward directions, the opening 28 is
The long edges 10b, 10b on both sides are formed as part of a circular arc with a considerably large radius of curvature, and the center is slightly narrow, and is elastically deformed with the frame main body 34 of the inner frame 12, which will be described later. The workpiece cloth 22 is firmly press-fitted so that the work cloth 22 can be held securely.

Both short pieces of the frame body, that is, as shown in FIG. On the top center of 36,
First recesses 38, 38 are formed. Both of these recesses 38 and 38 serve as "releases" for patterns etc. that are sewn on the work cloth 22, and both short pieces 10 of the opening 28 extend from the outer edge of the frame body.
A uniform dimension over the inner circumference of c, 10c, that is, a depth with an allowance for the thickness of the pattern, and a sewing needle 1.
The width is set to be wider than the swing range (and thus the width of the pattern) of No. 8.

On the other hand, the inner frame 12 is different from the outer frame 10 described above.
The work cloth 22 is inserted from above, and as shown in the figure, there is a frame main body 34 that can fit into the opening 28 of the outer frame 10, and a frame main body 34 that extends horizontally from above the outer periphery of the frame main body 34. A flange portion 40 is integrally formed. The frame main body 34 has an effective height that matches the depth of the opening 28 of the outer frame 10, and as shown in FIG.
When placed in a fixed position above, an elongated hole 42 is drilled into which the sewing needle 18 and presser foot 20 can be inserted in the longitudinal direction aligned with the cloth feeding direction, and which extends in the direction in which the work cloth 22 is fed. has been done. This elongated hole 42 is set to have a width and length that allow insertion of the presser foot 20. Also, the frame main body part 34
on the outer periphery of the opening 28 of the outer frame 10, especially on the outer periphery of the long pieces 12a, 12a on both sides.
A large number of elastic protrusions 44 that can be tightly fitted to the inner periphery of 0b are formed at appropriate intervals. The elastic protrusion 44
As shown in FIGS. 9 and 10, the cross section of the frame main body portion 34 is bent into a substantially fishhook or hook shape, so that it can be elastically deformed. On the other hand, the flange portion 40 has a uniform thickness and is formed to have the same contour as the external contour shape of the outer frame 10, and the flange portion has a flat lower surface 46 that presses the work cloth 22. .

In the inner frame 12 configured in this way, between the elastic protrusions 44, 44 provided in a curved manner at the center of the outer periphery of each short piece 12b at both ends of the frame main body 34, that is, at both corners of each short piece, Second recess 48, 48
is formed. Like the first recess 38 described above, each of the recesses 48 is for "escape" the pattern sewn on the work cloth 22, and is for the purpose of "escape" the sewing needle 1.
It is formed to have a dimension wider than the swing width of 8. When the inner and outer frames 12 and 10 are fitted together, the first
the inner end of the recess 38, i.e. the opening 28 of the outer frame 10
The two recesses 38 and 48 are aligned on the inner peripheral side of the short piece portion 10c, and finally both recesses 38 and 48 are communicated with each other in a key shape as shown in FIG.

In the cloth holding frame according to this embodiment, the width of the elongated hole 42 of the inner frame 12 described above is the effective opening area for stitching the workpiece cloth 22.

Functions/Effects In the fabric holding frame according to the present invention configured as described above, by setting the outer frame 10 and the inner frame 12 in a predetermined vertical direction, they fit closely together and hold the work cloth 22 under pressure. obtain. That is, as shown in FIG. 11, the frame body of the outer frame 10 and the collar portion 40 of the inner frame 12
The flat surfaces of the work cloth 22 are sandwiched between the work cloth 22 and come into close contact with each other. On the other hand, the frame main body part 34 of the inner frame 12 is
Each elastic protrusion 44 is fitted into the opening 28 of
comes into pressure contact with the inner peripheral surface of the opening 28. As a result, between the fitting abutting surfaces of both frames 10 and 12, that is, between the abutting surfaces of the frame and the flange 40, and between the opening 28 and the frame main body 34.
The work cloth 22 is firmly clamped over the entire circumference between the fitting surfaces, and the cloth portion corresponding to the effective opening area is stretched and held in a well-tensioned state. In particular, the frame body portion 34
At the time of fitting with the opening 28, both the long pieces 10a, 10a of the frame are elastically deformed outward, albeit slightly (preferably by the amount that the long edges 10b, 10b of the opening 28 become straight). Therefore, in cooperation with the elastic protrusion 44, the work cloth 22 can be more strongly crimped, and the center of the cloth portion, which tends to be insufficiently stretched, is pulled in the width direction to stretch it more appropriately. be able to.

Furthermore, in the fitted state of the inner and outer frames 12 and 10 described above, the respective first recesses 3 are opened as shown in FIG.
8 and the second recess 48 are aligned and communicated with each other,
As a result, between the fitting contact surfaces at both ends of both frames,
A common recess is formed for relief for the pattern. This prevents the inconvenience of pinching the pattern when setting the cloth holding frame to the work cloth 22. That is, message pattern P ₁ in Figure 14a,
When sewing the continuous pattern P ₂ shown in Fig. 14b, after sewing the patterns P ₁ and P ₂ up to a predetermined part in the middle, set the outer frame 10 and the inner frame 12 on the next fabric section. When it is repaired, the end part of the previously formed pattern, such as the letter "U" or the "3rd" pattern, is removed from the first and second recesses 38 and 4 described above.
8, its pinching is avoided. Also, both inner and outer frames 10,1
There is no gap between the fitting surfaces and abutting surfaces at both ends of the two.

In this embodiment, the first recesses 38 are formed on the inner periphery of both ends of the opening 28 of the outer frame 10, and the second recesses 48 are formed on the lower surface of both ends of the flange 40 of the inner frame 12.
They may be formed in the same way.

Alternative Embodiment As can be understood from the basic embodiment described above, the cloth holding frame to which the present invention is applied includes both the inner and outer frames.
Since recesses for pattern release are formed in the mating and abutting surfaces of the two ends perpendicular to the cloth feeding direction of Nos. 0 and 12, other embodiments other than those described above are also possible. Suggested. That is, as a plan to form only on the outer frame 10 side, the 13th
As shown in FIG.
An example is proposed in which the recesses 48 are formed one after the other.

As a plan to form only on the inner frame 12 side, the 13th
As shown in Figure b, an example is proposed in which a first recess 38 is formed in the lower surface of the short piece 12b of the flange 40, and a second recess 48 is formed continuously on the outer periphery of the frame main body 34.

In addition, by merging the above two plans, both internal and external frames 12 and 10
Continuous L-shaped recesses may be formed in each. However, no matter which cloth holding frame it is, if the recess is formed at least on one end, the purpose can be fulfilled, so as in the basic example, first and second recesses are provided at both ends, respectively. If you form 38 and 48, both frames 1
When setting 0 and 12, there is no need to align (face) the ends of each other, so handling is simple and this is recommended.

In this way, in the fabric holding frame according to the present invention, the outer frame and the inner frame, which can be closely fitted to each other, are fitted from above and below the fabric to be processed. A necessary portion of the cloth can be held in place, and the cloth portion required for pattern stitching can be properly tensioned and held over an effective opening area on the upper surface of the inner frame. The cloth holding frame according to the present invention has a first recess located, for example, on the abutment surface side, approximately in the center of the above-mentioned fitting abutment surfaces at the ends of both the inner and outer frames, and a first recess located on both sides of the fitment. Since the common recess for pattern release, which is continuous with the second recess located in the opening, is formed in accordance with the swing width of the sewing needle, the pattern is longer than the length of the effective opening area in the cloth feeding direction. When sewing continuous patterns, etc., after forming these patterns halfway, set both the inner and outer frames on the next required fabric part and stretch and hold the same fabric part. A pattern formed therein can be located within the recess.

As a result, it is possible to prevent the pattern, etc., from being caught between the inner and outer frame bodies, and to prevent the pattern from becoming deformed or damaged. Therefore, with the inner and outer frames closely fitting and abutting each other and holding the fabric properly, the stitching work for the remaining part of the pattern can be smoothly resumed and the pattern can be neatly finished. Can be sewn.

[Brief explanation of the drawing]

Fig. 1 is a perspective view schematically showing an embodiment of the cloth holding frame according to this embodiment, Fig. 2 is a plan view showing the outer frame, Fig. 3 is a side view, and Figs. 4 and 5 are respectively - line in Fig. 2, - line sectional view, 6th
The figure is a plan view showing the inner frame, and Figure 7 is a bottom view.
FIG. 8 is a side view, and FIGS. 9 and 10 are sectional views taken along lines - and - in FIG. 6, respectively.
11 and 12 are cross-sectional views partially exaggeratedly showing the workpiece cloth holding state of the cloth holding frame according to this embodiment, and FIGS. 13a and 13b are respectively the outer frames of different cloth holding frames, A perspective view showing a part of the inner frame, and FIGS. 14a and 14b are explanatory views illustrating a pattern to be sewn. 10...Outer frame, 12...Inner frame, 14...Sewing machine, 18...Sewing needle, 20...Presser foot, 22...Working cloth, 24...Feed dog, 26...Flat section, 28...
... Opening, 34 ... Frame main body, 40 ... Flange, 42
...Long hole.

Claims (1)

[Claims for Utility Model Registration] A sewing needle 18 that can swing in the lateral direction within a predetermined swing range, and a feed dog that cooperates with the presser foot 20 to impart a feed motion to the work cloth 22. 24, the frame main body part 34 is formed with an elongated hole 42 extending in the direction of the feed movement and into which the presser foot 20 can be inserted, and the frame main body 34. an inner frame 12 having a flange 40 extending horizontally from above the outer periphery of the frame body 34; and an opening 28 that fits into the outer periphery of the frame main body 34.
an outer frame 10 having a flat part 26 formed thereon and engaging with the lower surface of the flange 40; and at least one of the longitudinal ends of the inner frame 12 and the outer frame 10, 34 and the engagement surface between the opening 28 and the flange 4
A cloth holding frame for a sewing machine including recesses 38 and 48 that are formed continuously on the engaging surface of the sewing needle 18 and the flat part 26, respectively, and have a width wider than the sewing needle 18 and the swinging range.