JPH0718381Y2 - Fabric feed guide for sewing machine for Okumatsuri - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention relates to a cloth feed guide used when the back festival is performed with a rake sewing machine.

[Prior Art] Japanese Unexamined Utility Model Publication No. 1-115473, which is proposed by the applicant of the present invention, relates to this kind of material feeding guide.

As shown in FIG. 9, the material feeding guide is a guide ruler 33 and a hem line guide 34 attached to the lower surface of the ruler 33.
And a cover portion guide 36 that is disposed in an opposite posture to the folding guide surface 35 of the ruler body 33, and the cover portion 38 faces the hemline 39 while the cloth 37 passes through the cloth feed guide. The cloth 37 is folded and guided while the edge 40 of the cover portion 38 and the hemline 39 are positioned at the same time.

The folding guide surface 35 and the cover portion guide 36 are formed in a downwardly inclined shape in the material feeding direction, and as shown in FIG. 10, the material 37 reaches a position immediately before being held by the material presser 41 of the sewing machine. The folding position of the cover portion 38 is maintained.

A sewn sewing machine to which this cloth feed guide is applied has an arc-shaped sewing needle that reciprocates along an arc locus orthogonal to the cloth feeding direction, a looper that receives a sewing thread from the sewing needle to form a loop, and a cloth cloth 1 It is equipped with a plunger that pushes up the part from the bottom side in a chevron shape to specify the sewing position of the sewing needle, and a material presser.

[Problems to be solved by the device]

In the above-mentioned cloth feed guide, as shown in FIG. 10, the cover portion 28 is bent and guided by the folding guide surface 35 which is inclined downward in the cloth feed direction. That is, the cloth folded into the upper and lower three layers is fed out at the outlet 42 of the cloth feed guide while being restrained in a posture in which the cloth closely contacts the sewing machine table. Therefore, when a part of the fabric 37 is pushed up by the plunger 43, the fabric 37 is greatly bent between the plunger 43 and the outlet 42, and the fabric feed resistance in the vicinity of the outlet 42 increases. Variations in the sewing needle threading position are likely to occur. These variations also have an adverse effect on the position or sewing depth of the suture thread that has been deep-fed, and greatly affect the quality of the sewing target.

Further, in the conventional cloth feed guide, the hemline guide 34 is screwed to the guide ruler 33 so as to be adjustable and movable, and the folding allowance from the hemline to the free end of the cloth can be changed. However, the size of the cover portion 38 is fixed, which is inconvenient when it is desired to change the length of the cover portion according to the material quality and the material thickness.

Therefore, an object of the present invention is to reduce the material feeding resistance at the exit by changing the material guiding structure of the material feeding guide and to perform the back festival sewing with high accuracy and efficiency.

Another object of the present invention is to obtain a cloth feeding guide with excellent versatility, which can change the size of the cover portion to a large or small size and can be applied to clothes with different hardness and cloth thickness.

[Means for Solving the Problems]

The fabric feed guide 8 of the present invention is applied to a sewn sewing machine to guide and feed the fabric 6 into the back festival position having an S-shaped cross section, and the fabric feed guide 8 bends the cover portion 6d. A guide ruler body 9 having a folding guide surface 15 for defining the amount formed on one side of the upper surface, a hem line guide 10 attached to the lower surface of the guide ruler body 9 for defining a hem line 6b, and a guide ruler body 9 Folding guide surface
15 and a cover portion guide 11 that is provided so as to face the main guide surface 14 and defines the edge line of the cover portion 6d. The guide ruler body 9 has a movable ruler body 9A and a fixed ruler body that are stacked one above the other. 9B and screw means 9C for fastening and fixing both rulers 9A and 9B, the upper wall 15a of the fixed ruler 9B and the side end wall 15b of the movable ruler 9A.
The folding guide surface 15 is constituted by and, and the movable ruler body 9A is movably supported on the fixed ruler body 9B in a direction substantially orthogonal to the material feeding direction.

Specifically, the upper surface wall 28 of the cloth passage 26 provided between the guide ruler 9 and the hem line guide 10 is at least the outlet thereof.
On the 27th side, it is formed in an upward slope in the fabric feeding direction.

[Action]

The cloth 6 moves between the cover portion guide 11 and the guide ruler body 9 and between the guide ruler body 9 and the hemline guide 10, and is bent and guided in the back festival posture having an S-shaped cross section therebetween.

At this time, in the material passage 26 between the guide ruler 9 and the hemline guide 10, the upper surface wall 28 is inclined upward toward the material feeding direction at least near the outlet 27, and therefore passes through the material passage 26. The dough portion can be released and moved upward in the vicinity of the outlet 27.

In other words, when a part of the cloth 6 is pushed up by the plunger 3, the cloth folded in three layers can be positioned near the push-up position of the plunger 3, whereby the cloth feeding resistance in the vicinity of the outlet 27 can be improved. Can be reduced.

Since the guide ruler body 9 is divided into the movable ruler body 9A and the fixed ruler body 9B that are stacked on top of each other, the width dimension of the folding guide surface 15 is changed by adjusting the movable ruler body 9A, and the covering portion is covered. The size of 6b can be changed to large or small.

〔Example〕

1 to 7 show an embodiment in which an existing sewn-on sewing machine is used to form a back festival sewing machine.

In FIG. 2, a rake sewing machine includes a sewing needle 1 which reciprocates in a crossing (left and right) direction with respect to a material feeding direction, and a looper 2 which is disposed orthogonal to the sewing needle 1 and twists and turns while reciprocating back and forth. It is equipped with a plunger 3 that pushes up a part of the material 6 in a mountain shape from the lower surface side to specify the sewing position of the sewing needle 1, a material presser 4 and the like, and only one sewing thread 5 passed through the sewing needle 1 is used for sewing. Wear clothes.

In FIG. 7, the cloth 6 has a cut end 6a which is pre-scored by overlock stitching, and the cloth 6 is folded inward at a folding margin a of several cm to form a hemline 6b. Then, the inside of the cutting edge 6a is sewn by the sewing thread 5 by the covering margin b, and the folded back fabric portion 6e is sewn to the fabric body (best season) 6c by the back festival. After the sewing, the cover portion 6d defined by the cover allowance b is released from the folded posture and is adjacent to the fabric body 6c, and in this state, completely covers the outer surface of the sewing thread 5.

A fabric feed guide 8 is provided on the upper side of the sewing thread 1 in the fabric feed direction, and thereby the fabric 6 is guided and held in the back festival sewing position. 2 and 5, the material feeding guide 8 cooperates with the guide ruler 9, the hem line guide 10 that is attached to the lower surface of the ruler 9 to regulate the hem line 6b, and the guide ruler 9. It includes a cover portion guide 11 for guiding the cover portion 6d by folding, and a mounting means 12.13 for mounting the guide ruler body 11 on the sewing machine.

In FIG. 4, the guide ruler 9 is composed of a plate-like movable ruler 9A and a fixed ruler 9B that are stacked on top of each other, and both ruler 9A.
9B is a means for fastening and fixing 9B, and the side end wall of the fixed ruler body 9B facing the cover portion guide 11 is the main guide surface 14, and the flat upper surface of the fixed ruler body 9B adjacent to this main guide surface 14. The wall 15a and the side end wall 15b of the movable ruler body 9A form a folding guide surface 15. The folding guide surface 15 is formed in a divergent shape in the material feeding direction as shown in FIG.
The width at 15c is set slightly smaller than the cover margin b.

2 and 4, the movable ruler body 9A is fixed to the fixed ruler body 9B by screw means 9C composed of two countersunk screws.
The movable ruler 9A is movably supported by the two screw means 9C with respect to the fixed ruler 9B in a direction orthogonal to the material feeding direction. Specifically, a horizontally long screw insertion groove 16 orthogonal to the material feeding direction is provided in parallel with the plate surface of the movable ruler 9A.
The screw means 9C inserted in the is screwed into the fixed ruler body 9A.

In FIG. 4 and FIG. 5, the hemline guide 10 is a guide wall 18 that faces the bottom surface of the guide ruler body 9 in parallel at a small distance.
And a regulation wall 19 for positioning the hem line 6b, and a mounting wall 20 are formed by bending in a crank shape in a series, and the mounting wall 20 is fixed to the guide ruler body 9 by screws so that the mounting wall 20 can be laterally adjusted and moved. it can. By this adjustment, the folding allowance a can be changed within the range of 3 to 5 cm. The distance between the guide wall 18 and the guide ruler 9 is set to be slightly more than twice the thickness of the cloth 6 so that the cloth 6 in the folded state can pass without resistance as shown in FIG.

Between the guide ruler body 9 and the hemline guide 10, a cloth passage 26 having a U-shaped cross section that opens toward the cover portion guide 11 is formed. As shown in FIG. 1, the dough passage 26 has an upper surface wall 28 formed in an upwardly inclined shape so that the vertical interval increases toward the outlet 27 side.

In FIG. 6, the guide ruler body 9 and the hem line guide 10 are supported by the sewing machine main body through mounting means 12. This mounting means 12
Is a long arm 12a to the left and right, a bracket 12b screwed to the sewing machine body, and an arm fixed to the bracket 12b
The shaft 12c that supports the base end of 12a so that it can swing horizontally, and the arm 12
Consists of a stopper (not shown) that holds a in the working position. The arm 12a is swung counterclockwise against the holding force of the stopper from the use posture to set the guide ruler body 9 and the hem line guide 10 to the standby posture shown by the alternate long and short dash line. Set to 11. Then, the arm 12a is returned to the use posture and the cloth 6 is positioned.

In the form of setting the cloth 6 in this manner, the cloth 6 can be easily and quickly set on the cloth feed guide 8 without being disturbed by the guide ruler and the hem line guide 10.

As shown in FIG. 4, the cover portion guide 11 has a main wall 21 facing in parallel with the main guide surface 14 of the guide ruler 9 in a use state, and a folding guide surface that is laterally extended from the upper edge of the main wall 21. The pressing wall 22 facing 15 is bent and formed in an inverted L-shaped cross section. By the cover portion guide 11 and the guide ruler body 9, the cover portion 6d of the cloth 6 is guided back to the back festival sewing posture.

As shown in FIG. 6, the cover portion guide 11 is fixed to the fixed wall 23 on the sewing machine main body side through a mounting means 13 including an L-shaped bracket 13a and a set screw 13b. The cover portion guide 11 is fixed to the bracket 13a with a screw 24, and by changing the cover portion guide 11 up and down by loosening the screw 24, it is possible to cope with a change in the fabric thickness.

Next, the operation of the cloth feed guide 8 will be described. When performing the back festival, the sewing start end of the cloth 6 is sandwiched between the guide ruler body 9 and the hem line guide 10 and the cover portion guide 11 as described above. . Then, the fabric 6 is fed into the sewing machine while holding the folding allowance a.

In the vicinity of the user's hand, the cloth 6 is folded back inward at the hemline 6b. As the material feed guide 8 is approached, the cutting end 6a is gradually guided in an upright state, and as shown in FIG. 3, the hem line 6b is positioned by the regulation wall 19 at the material guide start end. At the same time, the cutting end 6a is guided by the holding wall 22 parallel to the folding guide surface 15 and folded into the folding guide surface 15 side as shown in FIG. Then, when passing through the middle part of the presser wall 22, the folded back fabric portion 6e on the fabric passage 26 side wraps around the folding guide surface 15 side, and finally the cover portion 6d is completely folded back toward the hem line 6b. Then, it becomes the back festival sewing posture. This folding posture is maintained by the material presser 4 continuous with the presser wall.

After this, the needle stick position is alternately raised by the plunger 3, and the needle stick position is sewn with the sewing needle 1. At this time, the fabric passage 26
Since the top wall 28 of the slopes upwards toward the exit 27,
The dough portion guided by the dough passage 26 is lifted upward and comes into close contact with the covering portion 6d. That is, the fabric folded in three layers is released and moved to near the height of the push-up position of the plunger 3 to prevent the fabric 6 from being greatly bent between the plunger 3 and the outlet 27. This makes the exit
The material passing resistance at 27 is reduced to eliminate variations in the material feed amount and the threading position, and it is possible to perform back festival sewing accurately and efficiently.

As shown in FIG. 7, the sewing needle 1 alternately sews through one point of the cloth body 6c and the fold of the cover portion 6d. The looper 2 receives the needle thread after being sewn by the looper 2. And
The looper 2 twists and rotates while advancing, and positions the loop at the needle stick position. In this state, the sewing needle 1 passes through the loop and sewes through the fabric body 6c or the folded mountain. The looper 2 transfers the loop to the sewing needle 1 and then returns to the original position and moves forward again to receive the needle thread. After that, the back festival can be continuously performed by repeating the above operation. The material feeding is performed after the looper 2 receives the needle thread and the sewing needle 1 comes out of the needle hole on the material body 6c side.

When changing the dimension of the cover portion 6d, loosen the screw means 9C and move the movable ruler body 9A laterally, and the exit 15c of the folding guide surface 15
After the width is changed to a size corresponding to the size of the cover portion 6d, the screw means 9C is screwed in to fix the movable ruler body 9A.
This size change is also performed when the thickness of the cloth 6 is different.

According to the above-described back festival sewing machine, the user can hold the folding allowance a and feed the cloth 6 into the sewing machine to reliably perform the back festival. Therefore, it is possible to perform the back festival even in the middle of a sewing line for manufacturing skirts, jackets, and the like.

[Another embodiment]

In the above embodiment, only the upper surface wall 28 of the fabric passage 26 is inclined upward toward the outlet 27, but as shown in FIG. 8, the guide wall 18 of the hem line guide 10 is also inclined upward in parallel with the upper surface wall 28. It may be. Further, the upper surface wall 28 is at least the outlet of the fabric passage 26.
Only the vicinity of 27 may be sloped up.

Similarly, the folding guide surface 15 is formed as an inclined surface parallel to the upper surface wall 28, or the folding guide surface 15 is formed as a downward inclined surface and the outlet 27 is provided at a position slightly lower than the pushing-up height of the plunger 3. You can freely change the structure such as.

When the cut end 6a is folded inward and the inner side of the folded mountain is deeply cut, the folded mountain is positioned by the introduction guide wall 23.

Since the attachment means 12 and 13 should be formed corresponding to the structure of the rake stitch sewing machine that differs depending on the manufacturer, the structure does not have to be the arm structure shown in the embodiment or the bracket shape. Further, the arm 12a may be moved in parallel to be switched between the use posture and the standby posture.

[Effect of device]

According to the fabric feed guide of the present invention, the top wall of the fabric passage 26 is
28 is inclined upward at least near the exit 27, and the cross section S
When the fabric 6 folded in a letter shape is pushed up by the plunger 3, it is possible to prevent the fabric 6 from being greatly bent between the outlet 27 and the plunger 3, so that the passage resistance of the fabric 6 can be reduced. As a result, the material feed amount and sewing needle 1
It is possible to prevent variation in the sewing position and to perform the back festival sewing with high accuracy and efficiency.

The guide ruler body 9 is divided into a movable ruler body 9A and a fixed ruler body 9B, and the movable ruler body 9A is supported so as to be movable relative to the fixed ruler body 9B in a direction substantially orthogonal to the material feeding direction. The width of the cover portion 6d can be changed to a large or small size according to the material quality, and the versatility of the material feed guide can be improved.

[Brief description of drawings]

1 to 7 show an embodiment of the dough feeding guide according to the present invention. FIG. 1 is a sectional view taken along the line AA in FIG. 2, FIG. 2 is a plan view of the dough feeding guide, 3 is a sectional view taken along the line BB in FIG. 2, FIG. 4 is a sectional view taken along the line CC in FIG. 2, FIG. 5 is a perspective view of the material feeding guide in a separated state, and FIG. FIG. 7 is a plan view of the fabric feed guide at the time, and FIG. 7 is a front view of the hem portion showing the back festival state. FIG. 8 is a sectional view showing another embodiment of the cloth feeding guide according to the present invention. 9 and 10 show a conventional cloth feeding guide. FIG. 9 is a partially broken perspective view, and FIG. 10 is a sectional view taken along the line D-D in FIG. 1 ... Sewing needle, 2 ... looper, 3 ... plunger, 6 ...
Fabric, 6b ...... hemline, 6d ... cover, 8 ... material feed guide, 9 ... guide ruler, 9A …… movable ruler, 9B ……
Fixed ruler, 9C ... screw means, 10 ... hemline guide, 11 ...
… Covering part guide, 14 …… Main guide surface, 15 …… Folding guide surface, 26 …… Fabric passage, 27 …… Exit, 28 …… Top wall.

Claims (2)

[Scope of utility model registration request] 1. A fabric feed guide (8) which is applied to a sewn sewing machine and feeds and guides the fabric (6) into a back festival posture having an S-shaped cross section, the fabric feed guide (8) comprising: A guide ruler (9) having a folding guide surface (15) that defines the bending amount of the cover portion (6d) formed on one side of the upper surface, and a hemline (6b) attached to the lower surface of the guide ruler (9). ) Hem line guide (10)
And a cover portion guide (11) that is disposed so as to face the folding guide surface (15) and the main guide surface (14) of the guide ruler (9) and defines the edge line of the cover portion (6d), The guide ruler (9) is a vertically stacked movable ruler (9A), a fixed ruler (9B), and both rulers (9A, 9B)
And the screw means (9C) for fastening and fixing the fixed ruler (9B) to the upper wall (15a) and the movable ruler (9C).
The folding guide surface (15) is configured with the side end wall (15b) of (A), and the movable ruler (9A) can move in a direction almost orthogonal to the material feeding direction with respect to the fixed ruler (9B). The fabric feed guide of the sewing machine for the back festival supported by. 2. The upper surface wall (28) of the cloth passage (26) provided between the guide ruler (9) and the hem line guide (10) faces the cloth feeding direction at least near the outlet (27). The fabric feeding guide for the sewing machine for the inner festival according to claim 1, wherein the fabric feeding guide is formed in an upward slope.