CN216427768U - Mark projection device of buttonhole serging machine - Google Patents

Abstract

The embodiment of the utility model relates to a mark projection device of a buttonhole sewing machine. The marking projecting device includes a first light projecting part, a second light projecting part and a third light projecting part, the first light projecting part projects light to the cloth support plate from the rear to form a linear longitudinal mark, and the longitudinal mark passes through the buttonhole hole The forming position and the needle drop position, the second light projection part and the third light projection part project light from the side to the cloth support plate to form a linear horizontal mark intersecting with the vertical mark, and the horizontal mark includes the second light projection part. The first transverse mark and the second transverse mark formed by the third light projection part, the first transverse mark and the second transverse mark coincide with each other, and the intersection of the transverse mark and the longitudinal mark becomes the positioning mark. With the mark projection device, even if the thickness of the cloth is changed, the positioning mark can be formed at the correct mark position without adjusting the setting position or the projection angle of the mark projection device.

Description

Mark Projection Device for Buttonhole Overlock Sewing Machine

technical field

The utility model relates to a mark projection device of a buttonhole overlock sewing machine. The mark projection device is used to project light on a cloth placed on a cloth support plate to form a positioning mark.

Background technique

In the conventional buttonhole sewing machine, in order to position the processing position of the cloth set on the cloth support plate, a light projection part is provided.

For example, Patent Document 1 discloses a buttonhole overlock sewing machine in which an optical fiber is provided in a round hole of an upper cutter, light is introduced into the optical fiber from a light source, and the light is projected from the front end of the optical fiber to the cloth directly below, so as to Position the buttonhole hole formation position. In addition, in order to locate the overlock position (needle drop position) of the fabric, the optical fiber is set on the needle bar, the tip of the optical fiber is attached to the attachment side of the sewing needle with a slight inclination, and light is projected from the tip of the optical fiber to the fabric below. , so as to locate the needle drop position.

In such a buttonhole overlock sewing machine, the position of the light projection part cannot be adjusted. If the positioning function of the buttonhole formation position and the needle drop position is to be taken into consideration, it is necessary to place the hole in the round hole of the upper cutter corresponding to the buttonhole formation position, for example. And light projection parts are respectively arranged on the needle bar corresponding to the needle drop position, and the light projection action is independently controlled, the structure is complex, and the control is complicated. In addition, if the buttonhole forming mechanism adopts a structure in which the upper part is the cutter seat and the lower part is the cutter, it is necessary to provide a through hole in the cutter seat and a light projection part such as an optical fiber in the through hole, and the processing cost is high.

In order to solve the above problems, it is conceivable to provide a light projection part other than the cutter, cutter holder, and needle bar, and to project the light obliquely from the side toward the processing position of the cloth to locate the buttonhole formation position or the needle drop position. However, in the case of obliquely projecting light, if the cloth thickness is changed, the position of the light spot formed on the cloth will shift accordingly. As shown in FIG. 3 , the solid-line rectangle represents a thin cloth, and when light is projected obliquely from above (indicated by the solid line), a mark is formed at the position circled by the solid line. If the cloth becomes thicker, as indicated by the dotted rectangle, the light projected by the same light projection part forms a mark at the position circled by the dotted line, and the mark deviates from the correct mark position. Therefore, it is necessary to adjust the installation position and the projection angle of the light projection part according to the thickness of the cloth.

Furthermore, if the light projection portion is provided at a position other than the cutter, cutter base, and needle bar, the installation position of the light projection portion may hinder the user's operation. In addition, when the presser foot is raised, the surrounding parts may block the light from the light projection part, and the mark cannot be formed in this state.

prior art literature

Patent Literature

[01] Patent Document 1: Chinese Patent Publication CN1824870A

Utility model content

(1) Technical problems to be solved

The embodiments of the present invention are made in view of the above problems, and its purpose is to provide a mark projection device for a buttonhole overlock sewing machine, the mark projection device can be easily installed on the buttonhole overlock sewing machine, and the mark formed by projection will not Offset due to changes in the thickness of the fabric does not hinder the user's operation, and surrounding parts do not hinder the formation of positioning marks.

(2) Technical solutions

In order to solve the above-mentioned technical problems, the embodiment of the present invention provides a mark projection device for a buttonhole overlock sewing machine, the buttonhole overlock sewing machine has an overlock mechanism arranged in the front and a cloth cutting mechanism arranged in the rear, including a first A light projecting part, a second light projecting part and a third light projecting part, the first light projecting part projects light to the cloth support plate from the rear to form a linear vertical mark, the vertical mark passing through the buttonhole forming position and the landing position. At the needle position, the second light projecting part and the third light projecting part project light from the side toward the cloth support plate to form a linear horizontal mark intersecting with the vertical mark, and the horizontal mark includes the A first transverse mark formed by the second light projection portion and a second transverse mark formed by the third light projection portion, the first transverse mark and the second transverse mark coincide with each other, the transverse mark and the The intersection of the longitudinal marks becomes the positioning mark.

The longitudinal mark is formed by projecting light from the back of the first light projecting portion serving as the vertical mark projecting portion, so that even if the thickness of the cloth is changed, there is no displacement in the left-right direction. At the same time, by projecting light from the side of the second light projection part and the third light projection part as the transverse mark projection part to form the transverse mark, even if the thickness of the cloth is changed, there will be no deviation in the front-rear direction. Therefore, an intersection formed by crossing the vertical mark and the horizontal mark is used as the positioning mark, and the formation position of the positioning mark will not be shifted due to changes in the thickness of the fabric.

Also, by projecting light by using two lateral mark projection parts, namely, the second light projection part and the third light projection part, the first lateral mark and the second lateral mark formed overlap each other to form the final lateral mark, even if the first and second lateral marks are formed. The light projected by one horizontal mark projection part of the second light projection part and the third light projection part is blocked and can be compensated by the light projected by the other horizontal mark projection part, so as to ensure that the final formed horizontal mark intersects with the vertical mark and can always be formed desired positioning mark. Thereby, it is not necessary to adjust the installation position or projection angle of the lateral mark projection part, the number of times of repeatedly operating the presser foot to confirm the cloth installation position can be reduced, the work efficiency can be improved, and the burden on the user can be reduced.

According to an embodiment of the present invention, in the marking projection device of the buttonhole overlock sewing machine, the first light projection part is arranged under the arm of the buttonhole overlock sewing machine and behind the cloth cutting mechanism and the second light projection part and the third light projection part are arranged on the side of the arm part so as to be movable in the front-rear direction.

By arranging the first light projection part forming the longitudinal marks passing through the buttonhole forming position and the needle drop position under the arm part of the buttonhole sewing machine and behind the cloth cutting mechanism, the first light projection part is located at the buttonhole sewing machine The middle or rear of the presser arm of the left and right presser feet of the sewing machine does not interfere with the user's operation.

In addition, by attaching the second light projecting part and the third light projecting part to the side of the arm part (not shown) of the sewing machine, they have a certain height, so they do not interfere with operation members such as the presser foot lever and the start lever. operation. In addition, by allowing the second light projection part and the third light projection part to move in the front-rear direction, the formation position of the positioning mark can be freely adjusted to meet different positioning requirements.

According to an embodiment of the present invention, the marking projection device of the buttonhole sewing machine further includes a first light projection part mounting bracket, and the first light projection part is fixed on the first light projection part mounting bracket. At the front end, the first light projection part mounting bracket is installed under the machine arm part by a fastener.

Thereby, the first light projection part can be easily attached to the existing buttonhole sewing machine without affecting the operation of the buttonhole sewing machine.

According to an embodiment of the present invention, the mark projection device of the buttonhole sewing machine further includes a second light projection part mounting bracket, a third light projection part mounting bracket and a light projection part mounting block, the second light projection part mounting bracket The projection part is fixed at the front end of the second light projection part mounting bracket, the third light projection part is fixed at the front end of the third light projection part installation bracket, and the light projection part mounting block is mounted on the On the side of the arm portion, two through holes are arranged in parallel in the light projection portion mounting block, and the second light projection portion mounting bracket and the third light projection portion mounting bracket are respectively inserted in the light projection portion mounting block. In the two through holes of the light projection part mounting block, the front and rear positions of the second light projection part are adjusted by adjusting the insertion position of the second light projection part mounting bracket; The front-rear position of the third light-projecting portion is adjusted by the insertion position of the projection portion mounting bracket.

Thereby, the second light projecting part and the third light projecting part can be easily attached to the existing buttonhole sewing machine, and the second light projecting part and the third light projecting part can be moved in the front-rear direction without affecting the buttonhole Operation of an overlock sewing machine.

According to an embodiment of the present invention, in the marking projection device of the buttonhole sewing machine, the second light projection part and the third light projection part can move between the buttonhole hole marking position and the needle drop marking position , when the second light projecting part and the third light projecting part are located at the buttonhole marking position, the second light projecting part and the third light projecting part project light to form a hole passing through the buttonhole A lateral mark of a position is formed, and when the second light projection part and the third light projection part are located at the needle drop mark position, the second light projection part and the third light projection part project light to form Transverse marking across the needle drop position.

Therefore, the mark projection device of the buttonhole overlock sewing machine can achieve both the positioning function of the buttonhole hole formation position and the needle drop position.

According to an embodiment of the present invention, in the mark projection device of the buttonhole sewing machine, a cutter cover is provided on the cloth support plate, and the cutter cover is subjected to anti-glare treatment.

Therefore, even if the longitudinal mark formed by the projection light of the first light projection part extends to the cutter cover on the outer side of the cloth, it is not easy to reflect light, which reduces the interference of the reflected light to the user's sight.

According to an embodiment of the present invention, in the marking projection device of the buttonhole sewing machine, the first light projection part, the second light projection part and the third light projection part are laser marking lamps.

Thereby, the mark projection device of the buttonhole overlock sewing machine can generate clear positioning marks.

According to an embodiment of the present invention, in the mark projection device of the buttonhole overlock sewing machine, the transverse mark is orthogonal to the longitudinal mark.

Thereby, the positioning mark which can be recognized more easily can be formed.

(3) Beneficial effects

The mark projection device of the buttonhole sewing machine provided according to the embodiment of the present invention can be easily installed on the buttonhole overlock sewing machine. Even if the thickness of the fabric changes, the setting position or the projection angle of the mark projection device can still be adjusted correctly. The position of the mark forms the positioning mark, and the user's operation is not hindered, and the surrounding parts will not hinder the formation of the positioning mark.

Description of drawings

The above and other objects, features and advantages of the present disclosure will be more clearly understood from the following detailed description, taken in conjunction with the accompanying drawings, wherein:

1 is a schematic diagram of forming a positioning mark of a buttonhole hole formation position using an embodiment of the mark projection device of the buttonhole sewing machine of the present invention, wherein (a) is a side view, (b) is a front view, and (c) is a top view;

2 is a schematic diagram of forming a positioning mark of a needle drop position using an embodiment of the mark projection device of the buttonhole sewing machine of the present invention, wherein (a) is a side view, (b) is a front view, and (c) is a top view;

FIG. 3 is an explanatory view of forming a positioning mark using a mark projection device of a conventional buttonhole sewing machine.

Description of reference numerals

1: The first marker light (light projection part);

2: The second marker light (light projection part);

3: The third marker light (light projection part);

4: wire;

5: The first marker light installation frame (light projection part installation frame);

6: Marking light installation block (light projection part installation block);

7: Second marker light bracket (light projection part mounting bracket);

8: The third marker light bracket (light projection part mounting bracket);

9: Fasteners;

10: Fasteners;

11: cloth cutting mechanism;

12: Needle bar (overlock mechanism);

13: sewing needle (overlock mechanism);

14: presser foot;

15: cloth support plate;

16: Press the ankle.

Detailed ways

In order to make the purposes, technical solutions and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are some, but not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present invention.

In embodiments of the present invention, the terms "comprising", "including", "having", etc. refer to the presence of the stated feature, element, element or component, but do not preclude the presence or addition of one or more other features , element, component or component.

FIG. 1 and FIG. 2 schematically show an embodiment of the marking projection device of the buttonhole overlock sewing machine of the present invention. The buttonhole overlock sewing machine has a cloth cutting mechanism 11 and an overlock mechanism (needle bar 12 and sewing needle 13 ) arranged in the front and rear. In the following description, the cloth cutting mechanism 11 side is referred to as the rear, and the hemming mechanism (needle bar 12 and sewing needle 13 ) side is referred to as the front. A presser foot 14 is provided at the rear of the cloth support plate 15. The presser foot 14 includes a presser arm 16 and a presser plate provided at the front end of the presser arm 16, and the presser plate is used to press the cloth from above.

In the present embodiment, the marker projection device includes a first marker lamp 1 as a vertical marker projection portion, and a second marker lamp 2 and a third marker lamp 3 as a horizontal marker projection portion. The first marker lamp 1 projects light to form a vertical marker lamp 1. The marking is formed by projecting light from the second marking lamp 2 and the third marking lamp 3 to form a horizontal marking, the vertical marking intersects the horizontal marking, and the intersection becomes the positioning mark.

Preferably, the longitudinal marks are orthogonal to the transverse marks, whereby a more easily identifiable positioning mark can be formed.

The first marker lamp 1 is installed directly behind the cloth cutting mechanism 11, and projects light toward the cloth support plate 15 from above to form a linear vertical mark passing through the buttonhole formation position and the needle drop position.

As an installation method of the first marker lamp 1 , as shown in FIGS. 1 and 2 , the first marker lamp 1 can be fixed at the front end of the first marker lamp mounting frame 5 , and the first marker lamp mounting frame 5 can be fixed by the fastener 9 . The wire 4 of the first marker lamp 1 is attached to the lower part of the arm of the sewing machine (not shown), and the wire 4 of the first marker lamp 1 is held inside the first marker lamp mounting frame 5 .

The second marker lamp 2 and the third marker lamp 3 are provided on the side of the cloth support plate 15 so as to be movable in the front-rear direction, project light toward the cloth support plate 15 from above, and the formed linear horizontal marks intersect with the vertical marks. , the lateral mark includes a first lateral mark formed by the second marking lamp 2 and a second lateral mark formed by the third marking lamp 3 , the first lateral mark and the second lateral mark coincide with each other.

As an installation method of the second marker light 2 and the third marker light 3 , as shown in FIGS. 1 and 2 , the second marker light 2 can be fixed to the front end of the second marker light bracket 7 , and the third marker light 3 can be fixed. At the front end of the third marker light bracket 8 , two through holes are provided in parallel in the marker light mounting block 6 , and the second marker light bracket 7 and the third marker light bracket 8 are respectively inserted into two of the marker light mounting block 6 . In the through hole, the marker lamp mounting block 6 is attached to the side (not shown) of the arm portion of the sewing machine through the fastener 10 . The front-rear position of the second marker light 2 is adjusted by adjusting the insertion position of the second marker light bracket 7 , and the front-rear position of the third marker light 3 is adjusted by adjusting the insertion position of the third marker light bracket 8 .

The above shows an embodiment in which the second marker lamp 2 and the third marker lamp 3 are installed on the same side of the cloth support plate 15, but the marker projection device of the buttonhole sewing machine of the present invention is not limited to this, as long as the second marker The first horizontal mark and the second horizontal mark formed by the lamp 2 and the third marking lamp 3 overlap each other to form the final horizontal mark, and the horizontal mark can cross the vertical mark.

According to the marking projection device of the buttonhole sewing machine of the present embodiment, the first marking lamp 1 as the vertical marking projecting part projects light from the rear to form vertical markings, so that even if the thickness of the cloth is changed, the left-right direction does not shift. At the same time, the second marker lamp 2 and the third marker lamp 3 act as a lateral marker projection part to project light from the side to form a lateral marker, so even if the thickness of the cloth changes, there will be no displacement in the front-rear direction. Therefore, an intersection formed by crossing the vertical mark and the horizontal mark is used as the positioning mark, and the formation position of the positioning mark will not be shifted due to changes in the thickness of the fabric.

When forming the positioning mark of the buttonhole hole formation position by the mark projection device of the buttonhole sewing machine of the present embodiment, as shown in Fig. 1(a) and (c), the second marker lamp 2 and the third marker lamp 3 are adjusted. The front and back positions of the stitch holes are located on the side of the buttonhole forming position (cloth cutting mechanism 11), and the horizontal mark formed by the overlapping of the first horizontal mark and the second horizontal mark passes through the buttonhole forming position and intersects with the vertical mark, and the intersection becomes Orientation marks for where the buttonhole holes are formed.

At this time, the first marker light 1 is located in the middle of the presser arm 16 of the pair of presser feet 14 and does not interfere with the user's operation.

When the positioning mark of the needle drop position is formed by the mark projection device of the buttonhole sewing machine of the present embodiment, as shown in FIGS. The front and rear positions are located on the side of the needle drop position (needle bar 12 and sewing needle 13). Positioning mark for needle drop position.

At this time, the first marker lamp 1 is far away from the presser foot 14 (presser foot arm 16 ) and does not interfere with the operation of the user.

By using two lateral marker projection parts, that is, the second marker lamp 2 and the third marker lamp 3, although the second marker lamp 2 and the third marker lamp 3 are located on the side of the presser foot 14, the rise or fall of the presser foot 14 A part of the light projected by the second marker lamp 2 or a part of the light projected by the third marker lamp 3 may be blocked. However, according to the present embodiment, the first lateral marker formed by the light projected by the second marker lamp 2 and the third marker lamp 3 is the same as the one. The second lateral marks overlap each other to form the final lateral mark, even if the light projected by one lateral mark projection part of the second marker lamp 2 and the third marker lamp 3 is blocked, it can be compensated by the light projected by the other lateral mark projection part, Make sure that the resulting horizontal mark crosses the vertical mark, always forming the desired alignment mark. Thereby, it is not necessary to adjust the installation position or projection angle of the lateral mark projection part, the number of times of repeatedly operating the presser foot to confirm the cloth installation position can be reduced, the work efficiency can be improved, and the burden on the user can be reduced.

In addition, by attaching the second marker light 2 and the third marker light 3 to the side of the arm portion of the sewing machine (not shown), they have a certain height, so even if the second marker light 2 and/or the third marker light 3 It is located on the side where the operation members such as the presser foot operation lever and the start operation lever are installed, so that the operation of each operation member is not hindered.

Although not shown, a cutter cover is also provided on the cloth support plate. Preferably, the cutter cover is anti-glare treated and has anti-glare properties. Therefore, even if the longitudinal mark formed by the projection light of the first marking lamp 1 extends to the cutter cover on the outer side of the cloth, it is not easy to reflect light, which reduces the interference of the reflected light to the user's sight.

In the present embodiment, the second marker lamp 2 and the third marker lamp 3 can move between the buttonhole marking position and the needle drop marking position, and when the second marker lamp 2 and the third marker lamp 3 are located at the buttonhole marking position , a lateral mark passing through the position where the buttonhole is formed can be formed, and when the second marking lamp 2 and the third marking lamp 3 are located at the needle drop mark position, a lateral mark passing through the needle drop position can be formed. Thereby, the mark projection device of the buttonhole selvage sewing machine of the present embodiment can achieve both the positioning function of the buttonhole hole formation position and the needle drop position.

As the first marker lamp 1 , the second marker lamp 2 , and the third marker lamp 3 as the light projection portion, laser marker lamps can be used. Laser marker lamps are characterized by high directivity, high monochromaticity and high energy, and can produce clear positioning marks. However, the light projecting portion is not limited to this, as long as it can project light to form a linear mark.

To sum up, the embodiments of the present invention provide a mark projection device for a buttonhole overlock sewing machine, including a first light projection part, a second light projection part and a third light projection part, the first light projection part from the back The light is projected toward the cloth support plate to form a linear longitudinal mark, and the longitudinal mark passes through the buttonhole formation position and the needle drop position. Linear transverse marks crossed by the marks, the transverse marks include a first transverse mark formed by the second light projection part and a second transverse mark formed by the third light projection part, and the first transverse mark and the second transverse mark are overlapped with each other, The intersection of the horizontal mark and the vertical mark becomes the positioning mark. The marking projection device of the buttonhole sewing machine according to the embodiment of the present invention can be easily installed on the buttonhole sewing machine, and even if the thickness of the fabric changes, the setting position or projection angle of the marking projection device can still be in the correct marking position without adjusting the setting position or projection angle of the marking projection device. The positioning mark is formed, and the user's operation is not hindered, and the surrounding parts do not hinder the formation of the positioning mark.

Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present utility model, but not to limit them; although the present utility model has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: The technical solutions described in the foregoing embodiments can still be modified, or some technical features thereof can be equivalently replaced; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit of the technical solutions of the various embodiments of the present invention. and range.

Claims (8)

1. A mark projection device for a buttonhole hemming sewing machine, the buttonhole hemming sewing machine having a hemming mechanism arranged in the front and a cloth cutting mechanism arranged in the rear, characterized in that: including a first light projection part, a second light projection part and a third light projection part, The first light projection part projects light to the cloth support plate from the rear to form a linear longitudinal mark, and the longitudinal mark passes through the buttonhole formation position and the needle drop position, The second light projecting part and the third light projecting part project light from the side toward the cloth support plate to form a linear horizontal mark intersecting with the vertical mark, the horizontal mark including the second light projecting a first transverse mark formed by the light projection part and a second transverse mark formed by the third light projection part, the first transverse mark and the second transverse mark coincide with each other, the transverse mark and the longitudinal mark The intersection becomes the positioning mark. 2 . The mark projection device of the buttonhole overlock sewing machine according to claim 1 , wherein the first light projection part is arranged under the arm part of the buttonhole overlock sewing machine, and is located at the bottom of the cloth cutting mechanism. 3 . In the rear, the second light projection part and the third light projection part are provided on the side of the arm part so as to be movable in the front-rear direction. 3 . The marking projection device of the buttonhole sewing machine according to claim 2 , further comprising a first light projection part mounting bracket, and the first light projection part is fixed on the first light projection part mounting bracket. 4 . The front end of the first light projection part is installed under the arm part by a fastener. 4. The mark projection device of the buttonhole sewing machine according to claim 2 or 3, characterized in that it further comprises a second light projection part mounting bracket, a third light projection part mounting bracket and a light projection part mounting block, the second light projection part is fixed on the front end of the second light projection part mounting bracket, the third light projection part is fixed at the front end of the third light projection part mounting bracket, The light projection part mounting block is mounted on the side of the arm part by fasteners, two through holes are arranged in parallel in the light projection part mounting block, the second light projection part mounting bracket and the The third light projection part mounting brackets are respectively inserted into the two through holes of the light projection part mounting block, The front-rear position of the second light projection portion is adjusted by adjusting the insertion position of the second light projection portion mounting bracket, and the third light projection portion is adjusted by adjusting the insertion position of the third light projection portion mounting bracket. The front and rear position of the projection part. 5 . The mark projection device of a buttonhole sewing machine according to claim 2 , wherein the second light projection part and the third light projection part can be located between the buttonhole hole mark position and the needle drop mark position. 6 . move, When the second light projecting part and the third light projecting part are located at the buttonhole marking position, the second light projecting part and the third light projecting part project light, and the formation is formed through the buttonhole hole. horizontal marker of position, When the second light projection part and the third light projection part are located at the needle drop mark position, the second light projection part and the third light projection part project light to pass through the needle drop position horizontal mark. 6 . The marking projection device of the buttonhole sewing machine according to claim 1 , wherein a cutter cover is provided on the cloth support plate, and the cutter cover is treated with anti-glare. 7 . 7 . The marking projecting device of the buttonhole sewing machine according to claim 1 , wherein the first light projecting part, the second light projecting part and the third light projecting part are laser marking lamps. 8 . 8 . The mark projecting device of a buttonhole overlock sewing machine according to claim 1 , wherein the transverse marks are orthogonal to the longitudinal marks. 9 .

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