KR101085302B1

KR101085302B1 - Sewing machine presser foot and sewing machine using the same

Info

Publication number: KR101085302B1
Application number: KR1020080101683A
Authority: KR
Inventors: 도모아키 아네자키; 다이치 후쿠시마
Original assignee: 도카이 고교 미싱 가부시키가이샤
Priority date: 2007-10-17
Filing date: 2008-10-16
Publication date: 2011-11-22
Also published as: DE102008051945B4; CN101413185A; KR20090039637A; JP2009095503A; DE102008051945A1

Abstract

Sewing machine pressing device which is attached to needle bar drive mechanisms 5, 8, 9 for driving the needle needle 7 so as to press the sewing object A in conjunction with the operation of the needle needle 7. In (11, 50), at least one inclined surface (30, 53) formed on the lower surface of the cloth pressing tool (11, 50) is provided. The inclined surfaces 30 and 53 exit the inclined surface 7 while the upper thread T, which extends out of the threading hole 7 a of the needle needle 7 and is enclosed by the sewing object A, moves along with the movement of the sewing object A. When the upper thread T touches 30 and 53, the upper thread T is operated along the inclined surfaces 30 and 53, so that the upper thread T does not touch the needle line of the needle needle 7. Arranged to avoid in position.

Description

SEWING MACHINE PRESSER FOOT AND SEWING MACHINE USING THE SAME}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sewing machine having a cloth pressing tool (cloth pressing tool) and a sewing machine provided with the cloth pressing tool. Specifically, the upper thread relating to the moving path of the sewing needle is evacuated from the moving path. The present invention relates to a cloth pressing tool for sewing machine and a sewing machine having the cloth pressing tool.

Fig. 9 shows a sewing head provided with a conventional industrial embroidery machine, 100 is a needle bar that is driven up and down, 101 is a needle needle fixed to the lower end of the needle bar 100, and T is a threading hole of the needle needle 101. The upper thread through 101a (refer FIG. 10), A is the to-be-sealed material hold | maintained in the horizontally moving sewing frame, and 102 is a needle plate. In this sewing machine, well-known stitching is performed by the interaction between the needle needle 100 moving together with the needle bar 100 and a kiln (not shown) installed below the needle plate 102. By moving A) horizontally, any embroidery pattern is sewn. In addition, as shown in Fig. 9, in a typical conventional cloth pressing tool (cloth pressing tool) 103, the bottom surface 103a for cloth pressing is flat and pushes against the cloth with the entire flat bottom surface 103a. It was to be done.

In such a sewing machine, as shown in FIG. 9, after sewing of a certain stitch is performed, when the to-be-sealed material A moves to the front (left side in the figure) for the next stitch, the needle needle 101 The upper thread T, which extends from the thread sewing hole 101a to the sewing object A, is inclined back and forth as indicated by the double-dot chain line T '. 10 to 12, the tip and the vicinity of the needle needle 101 at this time are enlarged and shown. At this time, as shown in FIG. 10, the upper thread T may be located just under the needle line of the needle needle 101. As shown in FIG. When the needle needle 101 descends in this state, the needle needle of the needle needle 101 will contact the upper thread T, as shown in FIG. Moreover, when the needle needle 101 descends, as shown in FIG. 12, the needle needle of the needle needle 101 will be strongly pushed on the upper thread T, and in some cases, the needle needle 101 will be stuck to the upper thread T. There is this. As a result, the upper thread T may be damaged or broken.

In addition, the movement of the to-be-sealed object A may be started immediately after the needle needle 101 has settled from the to-be-sealed object A. FIG. In that case, even when the needle needle 101 rises, as shown in FIG. 11 and FIG. 12, the needle needle of the needle needle 101 comes into contact with the upper thread T, and the upper thread T is damaged or broken. There is this.

In order to avoid such a problem, the embroidery sewing machine described in patent document 1 is equipped with the actual mounting apparatus which removes the upper thread out of the movement path of a needle | tip needle. In the embroidery sewing machine described in Patent Document 2, when the sewing frame is moved from one sewing needle position to the next sewing needle position, the sewing thread is moved laterally, and the upper thread is retracted from the movement path of the sewing needle. It is.

[Patent Document 1] Japanese Unexamined Patent Publication No. 2-2295

[Patent Document 2] Japanese Patent Application Laid-Open No. 2001-62174

When a real base device such as the sewing machine described in Patent Document 1 is provided, the number of parts of the sewing machine increases, which leads to a complicated structure and leads to cost up. Moreover, in the sewing machine which temporarily moves a sewing frame laterally like the sewing machine described in patent document 2, time for moving a sewing frame laterally is needed. Therefore, the needle speed should be reduced by one needle (stopping the shanghai east of the needle by one needle) by reducing the number of revolutions of the sewing machine or by a known jump mechanism.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned point, and its object is a simple structure that does not lead to an increase in the number of parts or cost up, and does not reduce the embroidery efficiency and can effectively prevent the needle needle from contacting the upper thread. To provide a sewing machine cloth pressing tool and a sewing machine having the cloth pressing tool.

In order to solve the above problems, the sewing machine presser for sewing according to the present invention is a sewing machine presser for reciprocating up and down to press the sewing object in association with the operation of the needle, and at least one formed on the lower surface of the cloth presser. When the upper thread which comes out of the thread sewing hole of the said needle needle and spans the to-be-sealed object moves with the inclined surface while moving with the movement of this to-be-sealed object, this upper thread moves along this inclined surface, The said inclined surface is arrange | positioned so that the upper thread may avoid to the position which does not reach the needle needle of this needle | tip.

According to this structure, the lower surface of the cloth pressing tool is not flat as usual, and at least one inclined surface is formed. The inclined surface moves along the inclined surface when the inclined surface comes out of the thread sewing hole of the sewing needle and comes into contact with the inclined surface while the upper thread is moved along with the movement of the sewing object. Since the upper thread is arranged to avoid the needle needle from touching the needle needle, the upper thread can be automatically withdrawn from the needle needle needle movement path even when the upper thread is likely to be caught in the needle needle movement path. Therefore, it is possible to effectively prevent the needle thread from touching the upper thread and damaging or breaking the upper thread. In addition, a simple and easy configuration of forming at least one inclined surface on the lower surface of the cloth pressing tool can automatically prevent the needle needle from touching the upper thread. Therefore, the structure of the sewing machine is not complicated, and the finishing is finished without increasing the number of parts and cost. In addition, the upper thread can be automatically retracted from the needle needle movement path of the sewing needle in accordance with the driving control of the sewing object or the cloth pressing tool in the normal sewing operation, so that the contents of the sewing operation control of the sewing machine may be the same as before. Therefore, there is no fear that the embroidery efficiency of a sewing machine will fall.

In the first embodiment, a first pressing protrusion is formed on a lower surface of the cloth pressing tool so as to be located at an inlet side of the thread sewing hole of the needle needle, and a pair of the inclined surfaces is formed on both sides of the first pressing protrusion. Each of the first pressing protrusions is formed at an inclined slope as it moves away from the pressing protrusions, and the lower surface of the cloth pressing tool further includes a second pressing protrusion having a height substantially equal to that of the first pressing protrusions, It is supposed to be pushed by the pressing projection. According to this configuration, the upper thread moves along one of the pair of inclined surfaces, and the upper thread is avoided in a position where the needle thread does not touch the needle needle.

In the second embodiment, a first pressing protrusion is formed on a lower surface of the cloth pressing tool at a second position shifted from a first position corresponding to an inlet side of the thread sewing hole of the needle needle, and one of the inclined surfaces is formed on the first surface. It is formed past the first position in an inclined upward as it moves away from the pressing projection, the lower surface of the cloth pressing tool is further formed with a second pressing projection at approximately the same height as the first pressing projection, The first and second pressing protrusions are pushed together by abutment. According to this configuration, the upper thread moves along one inclined surface, and the upper thread is avoided to a position where the needle thread does not touch the needle needle needle.

As an example, the first and second push projections and the inclined surface are formed around the needle through hole in a thread piece having a needle through hole, and the thread piece is attached to a lower portion of the structure of the cloth pressing tool. have.

According to this configuration, simply attaching the thread-cutting piece to the lower part of the conventional cloth pressing tool having a flat lower surface, the cloth pressing tool of the present invention can be easily configured, and the upper thread is automatically removed from the needle needle moving path of the needle needle. You can evacuate. Therefore, it is possible to effectively prevent the upper thread from being damaged or broken by only adding a slight change to the structure of the conventional sewing machine.

As another example, the first and second pressing protrusions and the inclined surface are integrally formed with the structure under the structure of the cloth pressing tool having the needle through hole.

In addition, the sewing machine according to the present invention includes a sewing machine cloth pressing tool having the above-described configuration, a needle bar keeping the needle needle at the lower end, and a sewing frame for holding the sewing object and moving with respect to the needle needle position of the needle needle. do.

According to the sewing machine of this configuration, even if the upper thread is caught by the needle path of the needle needle, the upper thread can be automatically evacuated from the needle needle needle movement path along the inclined surface formed on the lower surface of the cloth pressing tool. Therefore, the needle needle of the needle needle can be effectively prevented from contacting the upper thread so that the upper thread is not damaged or broken. In addition, the structure of the sewing machine is not complicated, and the finishing is finished without increasing the number of parts and cost. The sewing operation control content of the sewing machine may be the same as the conventional one, and there is no fear of lowering the embroidery efficiency of the sewing machine.

According to the sewing machine cloth pressing tool and the sewing machine provided with this cloth pressing tool which concerns on this invention, the upper thread is attached to the needle needle needle line without increasing the number of parts or cost-up, and reducing the embroidery efficiency with a simple structure. The contact can be prevented effectively.

BEST MODE FOR CARRYING OUT THE INVENTION [

EMBODIMENT OF THE INVENTION Hereinafter, embodiment of this invention is described in detail with reference to an accompanying drawing.

In addition, when referring to right or left in the following description, it shall show the right or left side seen from the front of the sewing machine mentioned later.

[First Embodiment]

1 is a front view of a sewing head H of the embroidery sewing machine according to the first embodiment of the present invention, and FIG. 2 is a side view (partial cross-sectional view) of the sewing head H. FIG. The sewing head H of this embodiment is a multiple needle type sewing head used for industrial embroidery sewing machines. This sewing head H is comprised with the arm 1 fixed to the sewing frame M, and the needle bar case 2 supported by the state which can slide horizontally with respect to the arm 1. As shown in FIG. Inside the arm 1, a sewing machine spindle 4 penetrates in the horizontal direction. The sewing spindle 4 is rotatably driven by a sewing machine driving motor (not shown). A needle plate 3 is provided below the sewing head H, and a known kiln (not shown) that is rotationally driven is provided below the needle plate 3. The to-be-sealed object A located in the upper part of the needle plate 3 is hold | maintained in the sewing frame which is not shown in figure. This sewing frame is driven in the front-rear and left-right directions (X-Y direction) in a horizontal plane with respect to the sewing needle position of the sewing needle 7. As shown in FIG.

A plurality of needle bars 5 (9 in the figure) are installed in the needle bar case 2 so as to be movable, and the needles 7 are fixed to the lower ends of the needle bars 5 through the needle holders 6, respectively. It is. The needle bar holder 8 is fixed to the substantially middle portion of the needle bar 5, and an engagement pin 8a is formed on the back side of the needle bar holder 8. On the other hand, the arm 1 is provided with a needle bar drive member 9 which moves up and down by the rotation of the sewing machine spindle 4. The needle bar drive member 9 is provided with a engagement recess 9a that engages with the engagement pin 8a of the selected needle bar 5. By sliding the needle bar case 2 to a position where an arbitrary needle bar 5 is selected, the engagement pin 8a of the needle bar 5 is engaged with the engagement recess 9a of the needle bar drive member 9. Keep fit As a result, the selected needle bar 5 is moved up and down by the needle bar drive member 9.

On the outer circumference of the needle bar 5, the cloth holder 10 is provided so as to be movable relative to the needle bar 5, and an engagement pin 10a is formed on the back side of the cloth holder 10. As shown in FIG. The cloth pressing member 11, which is an embodiment of the cloth pressing tool according to the present invention, is fixed to the front surface of the cloth pressing holder 10. The cloth pressing member 11 is formed in the shape of an elongate plate extending downward from the cloth pressing holder 10. The cloth pressing member 11 is bent into an approximately middle portion in the up and down direction to form a horizontal contact portion 11a. . The detail of the cloth pressing member 11 is mentioned later.

A coil spring 12 for pressing the cloth pressing member 11 downward is provided between the needle holder 8 and the cloth holder 10 on the outer circumference of the needle bar 5. By the pressing force of the coil spring 12, the contact part 11a of the cloth pressing member 11 is regulated in the state which pushed the needle holder 6 through the cushion 13. In this way, the cloth pressing member 11 and the needle bar 5 are driven up and down integrally in a state where the abutting portion 11a is pushed against the needle holder 6.

The arm 1 is provided with a support member 14 which moves up and down by the rotation of the sewing spindle 4. The supporting member 14 supports the engaging pin 10a of the cloth pressing holder 10 which moves together with the needle bar 5 as will be described later.

The top dead center of the needle bar 5 is a position where the stopper 16 fixed on the upper side of the needle bar holder 8 stops at the lower surface of the horizontal frame 2a through the cushion 17. Between the upper end of the needle bar 5 on the outer circumference of the needle bar 5 and the upper surface of the horizontal frame 2a, a needle bar holding spring 15 for pressing the needle bar 5 upward is provided. The needle bar 5 is held at the top dead center position by the pressing force of the needle bar holding spring 15 in a state where the needle bar 5 is not driven by the needle bar drive member 9.

Each balance 19 corresponding to each needle bar 5 is rotatably supported on the balance shaft 18 supported by the needle bar case 2. The arm 1 is provided with a balance driving lever 20 which is oscillated by the rotation of the sewing spindle 4, and the balance driving lever 20 is engaged with the balance 19 corresponding to the selected needle bar 5. It is. As a result, the balance 19 corresponding to the needle bar 5 selected by the swing of the balance driving lever 20 swings.

The cloth pressing member (cloth pressing tool) 11 will be described in detail. 3 is a perspective view showing the cloth pressing member 11. The cloth pressing member 11 is composed of a base member (upper structure) 21 fixed to the cloth holder 10 and a cloth pressing body (lower structure) 22 connected to the lower end of the base member 21. . The base member 21 is formed in the shape of an elongated thin plate that extends up and down, and has a through hole through which a screw for fixing the base member 21 to the cloth presser 10 is inserted through the upper end thereof. The fixing part 21a which consists of is formed. The fixing portion 21a is formed as an elongated long hole extending vertically. Thereby, the fixing position of the cloth pressing member 11 with respect to the cloth pressing holder 10 can be adjusted up and down. In addition, an abutting portion 11b formed of a through hole through which the needle bar 5 is inserted is formed in the abutting portion 11a provided at the upper and lower middle portions of the base member 21. A protruding pin 24 is formed in the vicinity of the lower end of the base member 21, and a screw hole (not shown) for fixing the screw 23 is formed below the pin 24.

The cloth pressing body 22 is formed in the shape of an elongate thin plate extending in the vertical direction, and an engaging hole 25 made of a through hole is formed at the upper end. The engagement hole 25 is set in the width dimension so that the pin 24 of the base member 21 can be fitted in a substantially tight state. Moreover, the stepped hole 26 in which the head part of the screw 23 fits is formed in the lower part of the engagement hole 25. As shown in FIG. The engagement hole 25 and the stepped hole 26 are formed by long holes vertically. Thereby, the fixing position of the cloth pressing body 22 with respect to the base member 21 by the screw 23 can be adjusted up and down.

On the other hand, the lower end of the cloth pressing body 22 is bent at approximately right angles, and is formed in a horizontal plane shape. In the cloth pressing member 11 according to the present embodiment, the actual thread piece 28 is attached to the lower surface of the lower end of the cloth pressing body (lower structure) 22, and the shape of the actual thread piece 28 is provided. It is characteristic of the structure. The actual thread piece 28 is attached by inserting the upper end into the through-hole formed in the lower end of the cloth press body 22 (refer FIG. 4). As shown in FIGS. 3 to 6, the actual thread piece 28 has a substantially cylindrical shape having an elliptical needle through hole 27 (see FIG. 6 (b)) for passing through the needle needle 7 at the center thereof. On the lower surface of the front center (the front center along the long diameter direction of the needle passage hole 27), a front push protrusion (first push protrusion) 29 is formed which protrudes in a substantially V shape downward. In the same way, the rear lower projection (second pressing projection) 31 projecting downward at the same height as the front pressing projection 29 on the lower surface of the rear center (opposite side of the front pressing projection 29) along the longitudinal direction. ) Is formed. The to-be-sealed material A is pushed to the needle plate 3 by the front pusher 29 and the rear pusher 31. A pair of inclined surfaces symmetrically symmetric with each other on both sides of the front pressing projection 29 at the lower end portion of the actual recovery piece 28, which are inclined upwardly as the distance from the front pressing projection 29 to the left and right sides and rearward (recession) Skin) 30 is formed. In other words, the front pressing projection 29 is a pressing projection and serves as a starting end of each inclined surface 30. The inclined surface (threaded skin) 30 acts as a thread release action. That is, while the upper thread T coming out from the threading hole 7a of the needle needle 7 and covering the to-be-sealed material A moves along with the movement of this to-be-sealed material A, the front push-up protrusion 29 (that is, the inclined surface ( 30), the upper thread T is operated along the inclined surface 30, so that the upper thread T is avoided in a position not touching the needle line of the needle 7 The inclined surface 30 is arrange | positioned.

The arrangement of the front pressing projections (first pressing projections) 29 in the actual thread piece 28 may be determined in consideration of the arrangement of the threading holes 7a of the needle needle 7. The upper thread T fits snugly on the needle needle 7 (which may possibly damage the needle thread T), including the degree of inclination (degree of being slightly inclined) along the axis of the threading hole 7a of the needle needle 7 In this case, the to-be-sealed material is operated from the outlet side of the thread sewing tool yoke 7a to the inlet side. That is, in such a case, since the upper thread T coming out of the exit side of the thread sewing hole 7a moves to the inlet side, the needle thread 7 comes in contact with the needle line 7 and may be damaged. Therefore, in such a case, it is assumed that the inclined surface 30 is formed so that the upper thread T is avoided along the inclined surface 30 of the actual scratch piece 28. Thus, in this first embodiment, the front pressing projection (first pressing projection) 29 in the actual thread piece 28 is formed so as to be located at the inlet side of the thread sewing hole 7a of the needle needle 7. The inclined surface 30 is formed in the both sides. Thereby, when the upper thread T which exited from the exit side of the thread sewing hole 7a is going to move to an entrance side, it follows the inclination surface 30 of either left and right at the location of the front pressing protrusion (1st pressing protrusion) 29. You will be missed. In addition, since the needle | tip 7 is fixed so that the inlet of the threading hole 7a may face to a sewing machine front easily so that thread sewing may be performed easily, the front part formed so that it may be located in the inlet side of the threading hole 7a of the needle | punching needle 7 is possible. The pressing protrusion (first pressing protrusion) 29 is located in front of the sewing machine.

The sewing operation in the sewing head H having the above configuration will be described. First, the arbitrary needle bar 5 is selected by sliding the needle bar case 2 with respect to the arm 1. Thereby, the engagement pin 8a of the needle bar holder 8 corresponding to the selected needle bar 5 is engaged with the engagement recessed part 9a of the needle bar drive member 9, and this needle bar 5 The balance 19 corresponding to the engagement with the balance driving lever 20. When the sewing machine spindle 4 is rotated in this state, the selected needle bar 5 reciprocates up and down, and the balance 19 corresponding to the needle bar 5 swings up and down.

At this time, when the needle bar 5 starts to descend from the top dead center, the cloth pressing member 11 also starts to descend with the needle bar 5. At the same time as the needle bar 5 starts to descend, the support member 14 starts to descend. Here, the lowering speed of the support member 14 is set slightly later than the lowering speed of the needle bar 5. Thereby, the engagement pin 10a adheres to the support member 14 at some point in time, and is stopped by the support member 14. Thereafter, the cloth pressing member 11 descends at the falling speed of the supporting member 14 while the engaging pin 10a is supported by the supporting member 14 to reach the bottom dead center. During this period, since the lowering speed of the needle bar 5 is faster than the lowering speed of the cloth pressing member 11, the needle bar holder 8 is closer to the cloth pressing bar 10, and the coil spring 12 is in a compressed state. When the cloth pressing member 11 is at the bottom dead center, the to-be-sealed material A is pushed onto the needle plate 3 by the front pressing protrusion 29 and the rear pressing protrusion 31 of the actual thread piece 28 installed at the lower end thereof. It becomes the attached state.

After the cloth pressing member 11 reaches the bottom dead center, the coil spring 12 is compressed by the lowering of the needle bar holder 8, and the needle bar 5 continues to lower. Thereby, the needle | tip 7 is inserted into the to-be-processed object A, reaches bottom dead center, and after that, it switches to a raise and is needled. During this time, the cloth pressing member 11 stays at the bottom dead center. After the needle bar 5 has been needled from the sewing object A, the cloth pressing member 11 together with the supporting member 14 starts to rise from the bottom dead center, and at some point, the needle holder 6 The contact part 11a is abutted through the cushion 13. Thereafter, the contact portion 11a is pushed up by the needle holder 6 so that the cloth pressing member 11 rises together with the needle bar 5, and the needle needle 7 and the cloth pressing member 11 are shown in FIG. Return to the state shown in.

Here, the retraction operation of the upper thread T by the actual avoiding piece 28 will be described. 4 to 6 are views for explaining the structure of the cloth pressing member 11 and the operation of the sewing needle 7 and the cloth pressing member 11. 4 is a side view (partial cross-sectional view) of the needle needle 7 and the cloth pressing member 11, and FIG. 5 (a) is a side view (partial cross-sectional view) of the lower end of the cloth pressing member 11 and the needle line of the needle needle 7; Fig. 5 (b) is a front view thereof, and Fig. 6 (a) is a front view of the lower end of the cloth pressing member 11 and the needle bar of the needle needle 7, (b) is a plan view thereof. As shown in FIG. 4, after sewing of a certain stitch is performed, the to-be-sealed material A moves to the front of a sewing machine (left side in the figure) by the movement of a sewing frame for the next stitch. As a result, the upper thread T that extends from the thread sewing hole 7a of the needle needle 7 to the sewing object A is inclined in the front-rear direction in a state of being interposed with the pin as indicated by the double-dot chain line T '. In this state, the upper thread T may be located just below the needle bar of the needle | sticker 7. In FIG. 5, the needle line portion of the sewing needle 7 in this case is enlarged. At this time, as shown in the same figure (b), the upper thread T is located in the position which opposes the front push protrusion 29. As shown in FIG. When the to-be-sealed object A further moves to the front of a sewing machine in the state, the upper thread T abuts on the front pusher 29. As shown in FIG. Thereafter, the upper thread T which abuts on the front pressing protrusion 29 shifts to either of the left and right inclined surfaces 30. As shown in FIG. 6, the upper thread T shifted to the inclined surface 30 is avoided to the side of the sewing needle 7 while rising along the inclined surface 30. As a result, the upper thread T located immediately below the needle bar 7 of the needle needle 7 retracts from the movement path of the needle needle 7 of the needle needle 7. In this way, contact of the needle bar 7 with the needle thread T is avoided.

In addition, immediately after the needle needle 7 is removed from the sewing object A, the cloth pressing member 11 is located near the bottom dead center. Therefore, even when the needle needle 7 starts to move from the sewing object A to the sewing object A from the threaded hole 7a of the needle needle 7 even when the movement of the sewing object A is started by the sewing frame. The upper thread T, which is stretched, abuts against the front pressing protrusion 29 of the actual thread piece 28 with the movement of the sewing object A. FIG. Thereby, similarly to the former case, the upper thread T moves to either of the left and right inclined surfaces 30 and rises along the inclined surface 30 to avoid the side of the needle needle 7. As described above, even when the needle A starts to move immediately after the needle needle 7 has sedimented from the object A, the upper thread T is moved by the inclined surface 30 by the inclined surface 30. Since the needle needle 7 rises, the needle needle of the needle needle 7 can be prevented from contacting the upper thread T even when the needle needle 7 rises.

In addition, although the case where the upper thread T moves to the inclined surface 30 on the right side from the front pressing protrusion 29 in FIG. 6 is shown, the upper thread T is inclined surface 30 on either of the right and left sides from the front pressing protrusion 29. ) Is determined according to various situations such as the moving direction of the to-be-sealed material A at the time of stitching, and it may be shifted to the inclined surface 30 on the left side depending on the situation.

As described above, according to the cloth pressing member 11 of the sewing machine of the present embodiment, the inclined surface 30 is obtained even when the upper thread T is caught by the moving path of the needle needle 7 with the movement of the sewing object A. FIG. The upper thread T can be evacuated from the moving path of the needle bar 7 of the needle needle 7 by using " Therefore, it is possible to effectively prevent the needle line of the needle needle 7 from contacting the upper thread T, so that the upper thread T is not damaged or broken. Moreover, according to the sewing machine of this embodiment, only the inclined surface 30 is formed in the cloth pressing member 11 (The thread pressing piece 28 which has the inclined surface 30 is attached to the cloth pressing member 11). , It is possible to effectively prevent the contact of the needle needle 7 and the upper thread (T). Therefore, the structure of the sewing machine is not complicated and is finished without increasing the number of parts and cost. In addition, according to the sewing machine of the present embodiment, the upper thread T is sealed by the inclined surface 30 formed on the cloth pressing member 11 with the movement of the sewing object A in the normal sewing operation ( Since it is possible to withdraw from the moving path of the needle bar of 7), the sewing operation of the sewing machine may be the same as the conventional one. Therefore, it is not necessary to lower the number of revolutions of the sewing machine or to jump the needle bar by one needle, and there is no fear that the embroidery efficiency of the sewing machine will decrease.

Second Embodiment

Next, the embroidery sewing machine using the cloth pressing tool which concerns on 2nd Embodiment of this invention is demonstrated. In addition, in the figure which concerns on 2nd Embodiment, and the description, the same code | symbol is attached | subjected to the part common to 1st Embodiment, and the detailed description of the part is abbreviate | omitted. Moreover, about matters other than the matter demonstrated below, it is the same as that of 1st Embodiment. The side view (partial sectional drawing) of the sewing head HH with which the embroidery machine of 2nd Embodiment is equipped is shown in FIG. The sewing head HH of the present embodiment differs slightly from the sewing head H of the first embodiment in terms of components and operating mechanisms. That is, in the cloth pressing member 50 of the sewing head HH, the cloth pressing member 11 of the sewing head H is composed of two parts of the base member 21 and the cloth pressing body 22. Unlike what is present, it is integrally formed with one piece. In addition, the cloth pressing member 10 is not provided in the sewing head HH, and the upper end of the cloth pressing member 50 is directly attached to the outer circumference of the needle bar 5. Moreover, accordingly, the support member 14 which supports the engagement pin 10a and the engagement pin 10a which were provided in the cloth presser 10 is also abbreviate | omitted.

The cloth pressing member 50, which is the cloth pressing tool according to the second embodiment of the present invention, is formed in an elongated flat plate shape that extends up and down in its entirety, and has an upper abutting portion 50a having a horizontal plane shape formed at an upper end thereof. It has the horizontal contact intermediate contact part 50b formed in the intermediate part. In the upper contact portion 50a and the intermediate contact portion 50b, an insertion portion (not shown) made of a through hole through which the needle bar 5 penetrates is formed. A coil spring 12 for pressing the fabric pressing member 50 downward is provided between the needle bar 8 and the upper abutting portion 50a. The cloth pressing member 50 descends together with the needle bar 5 by the pressure of the coil spring 12 with the lowering of the needle bar holder 8. The lowering of the cloth pressing member 50 stops at the position where the lower surface of the upper contact portion 50a abuts against the cushion 51 on the horizontal frame 2b provided below the needle bar case 2. The position is the bottom dead center of the cloth pressing member 50.

After the cloth pressing member 50 reaches the bottom dead center, the coil spring 12 is compressed by the lowering of the needle bar holder 8, and the needle bar 5 continues to fall further. Thereby, the needle | tip 7 is inserted into the to-be-processed object A, reaches | attains a bottom dead center, and after that, it switches to a raise and is needled. Previously, the cloth pressing member 50 stays at the bottom dead center. After the needle bar 5 has been needled from the sewing object A, the needle holder 6 abuts on the intermediate contact portion 50b through the cushion 13. Thereafter, the intermediate contact portion 50b is pushed up by the needle holder 6, and the cloth pressing member 50 rises together with the needle bar 5. As shown in FIG.

The cloth pressing member 50 of this embodiment is equipped with the actual threading piece 52 of the shape different from the actual threading piece 28 with which the cloth pressing member 11 of 1st Embodiment is equipped. That is, the actual thread piece 52 is attached to the lower part of the structure of the cloth pressing member 50. 8 is an enlarged front view of the sewing needle 7 and the cloth pressing member 50. The front pressing projection (first pressing projection) 54 of the actual thread piece 52 is biased to the right as viewed from the front (relative to the position (first position) of the front center along the long diameter direction of the needle passing hole 27). It is formed in the position (second position). That is, in this second embodiment, the front pressing projection (first pressing projection) 54 of the actual thread piece 52 is located from the first position corresponding to the inlet side of the thread sewing hole 7a of the needle needle 7. It is formed in the shifted 2nd position. Incidentally, the inclined surface (pull-out skin) 53 continuous from the front pressing protrusion 54 is formed only on the left side of the front pressing protrusion 54, and turns from the front pressing protrusion 54 to the left side (clockwise). It is formed to be inclined upward. That is, the inclined surface 53 is formed past the inclined path first position (front center) to ascend as it moves away from the front pressing projection (first pressing projection) 54. On the other hand, such an inclined surface (departure skin) was not formed on the right side of the front pressing protrusion 54. In this way, one inclined surface (silent skin part) 53 is formed in the actual scratch piece 52 of the second embodiment.

According to the actual avoiding piece 52 of the second embodiment, the front pressing protrusion 54 is formed at a position oriented to the right side when viewed from the front, so that the upper thread T moves the needle line 7 through the moving path. When the upper thread T is caught, the upper thread T is not the front push protrusion 54 (that is, the start of the inclined surface 53), but abuts on the middle of the inclined surface 53, after which the upper thread T is the sewing object A. The movement of the needle needle 7 is avoided to the left side of the needle needle 7 along the inclined surface 53 (the tension increases, so ascending along the inclined surface to avoid tension of the upper thread T). Deviate from the path Therefore, also in this embodiment, when the needle needle 7 raises or falls, it can prevent that the needle needle of the needle needle 7 contacts upper thread T. FIG.

As mentioned above, although embodiment of this invention was described, this invention is not limited to the said embodiment, Various deformation | transformation are possible within the scope of a claim, and the technical idea described in specification and drawing. For example, although the case where the cloth pressing member 11 was comprised from the base member 21 and the cloth pressing body 22 which are separate components was shown in the said 1st Embodiment, the base member of the cloth pressing member 11 was shown. 21 and the cloth press body 22 can also be formed integrally with one component.

In addition, as long as the thread piece (thread repellent skin) has a shape that allows the upper thread T to be retracted from the movement path of the needle needle 7, the thread-receiving skin (like the receding skin part) may be inclined in a straight line like the inclined surfaces 30 and 53 shown in the above embodiment. It is not limited, It may be set as the inclined surface which consists of curved shapes, such as spherical shape or circular arc shape. In addition, if the actual avoiding pieces 28 and 52 have the inclined surfaces 30 and 53 and the pressing projections (front pressing projections 29 and 54) as described above, the specific shapes of other portions are shown in the above embodiment. It is not limited.

In addition, in the above embodiment, the case where the threaded pieces 28 and 52 having the inclined surfaces 30 and 53 are attached to the cloth pressing members 11 and 50 is shown. However, the threaded pieces are integrally formed with the structure of the cloth pressing member. It may be formed as.

Moreover, in the said embodiment, although the example which applied this invention to two different sewing heads H and HH was shown, the specific structure of the sewing head to which this invention is applied is not limited to what was shown to the said embodiment. Moreover, although the said embodiment showed the example which applied this invention to multiple needle embroidery, it cannot be overemphasized that this invention is applicable also to the sewing machine other than a multiple needle embroidery.

BRIEF DESCRIPTION OF THE DRAWINGS It is a front view of the sewing machine head of the embroidery sewing machine using the cloth pressing tool which concerns on 1st Embodiment of this invention.

2 is a side view (partial cross-sectional view) of the sewing head.

It is a perspective view which shows the cloth pressing tool which concerns on 1st Embodiment of this invention.

4 is a view for explaining the configuration and operation of the cloth pressing tool.

Fig. 5 is a partially enlarged view of the lower end of the cloth pressing tool and the needle needle of the needle needle, (a) is a side view (partial cross section), and (b) is a front view.

Fig. 6 is a partially enlarged view of the lower end of the cloth pressing tool and the needle needle of the needle needle, (a) is a front view, and (b) is a plan view.

It is a side view (partial cross section) figure of the sewing machine head of the embroidery sewing machine using the cloth pressing tool which concerns on 2nd Embodiment of this invention.

Fig. 8 is an enlarged front view of the cloth pressing tool according to the second embodiment of the present invention and a needle needle relating thereto.

9 is a partially enlarged view of a cloth pressing tool and a needle in a conventional embroidery sewing machine.

10 is a view for explaining the movement of the needle and the upper thread in a conventional embroidery sewing machine.

11 is a view for explaining the movement of the needle and the upper thread in the conventional embroidery sewing machine.

12 is a view for explaining the movement of the needle and the upper thread in the conventional embroidery sewing machine.

1 cancer

2 needle bar case

3 needle valve

4 sewing machine

5 needle bar

6 needle holder

7 needles

8 needle bar holder

9 Needle bar drive member

10 Cloth Presser

11 Cloth pressing member (cloth pressing tool)

12 coil spring

14 support member

15 needle bar retaining spring

18 balance axis

19 balance

20 Balance Driving Lever

21 Base member

22 cloth pressing body (lower structure)

27 Needle-through hole

28 live episodes

29Front Pusher (First Pusher)

30 inclined surface (prandial skin)

31 Rear Pusher (2nd Pusher)

50 cloth pressing member (cloth pressing tool)

52 actual episode

53 Inclined Surface (Receding Skin)

54 Front Pusher (First Pusher)

55 Rear Pusher (2nd Pusher)

A sewing material

H sewing head

HH Sewing Head

T upper thread

Claims

delete

It is a sewing machine pressing tool for reciprocating up and down in order to press the sewing object in conjunction with the operation of the needle.

A pair of inclined surfaces formed on the lower surface of the cloth pressing tool,

The first pressing projection is formed on the lower surface of the cloth pressing tool so as to be located at the inlet side of the thread sewing hole of the needle needle.

The pair of inclined surfaces are respectively formed on inclined paths so as to rise as they move away from the first pressing protrusion on both sides of the first pressing protrusion,

The lower surface of the cloth pressing tool is further formed with a second pressing protrusion at the same height as the first pressing protrusion,

The first and second pressing projections abut against the to-be-sealed material, so that a pressing against the to-be-sealed material by the cloth pressing tool is performed.

The upper thread moves along this inclined surface when the upper thread coming out of the thread sewing hole of the sewing needle and straddling the to-be-engaged object moves along with the movement of the sewing object, so that the upper thread moves along the inclined surface, so that the upper thread is A sewing machine presser, characterized in that it is avoided in a position not touching the needle line.

The method according to claim 2,

The first and second push protrusions and the pair of inclined surfaces are formed around the needle through hole in a thread avoiding piece having a needle through hole,

A thread pressing tool for sewing machines, wherein the thread piece is attached to a lower portion of the structure of the fabric pressing tool.

The method according to claim 2,

And the first and second push protrusions and the pair of inclined surfaces are integrally formed with the structure under the structure of the cloth pressing tool having a needle through hole.

As a sewing machine pressing tool for reciprocating up and down to press the sewing object in conjunction with the operation of the needle,

It is provided with one inclined surface formed in the lower surface of this cloth pressing tool,

On the lower surface of the cloth pressing tool, a first pressing protrusion is formed at a second position deviated from a first position corresponding to the inlet side of the thread sewing hole of the needle needle,

The one inclined surface is formed through the first position at an incline rising as the distance from the first pressing protrusion increases;

The upper thread moves along this inclined surface when the upper thread coming out of the thread sewing hole of the sewing needle and straddling the to-be-engaged object moves along with the movement of the sewing object, so that the upper thread moves along the inclined surface, so that the upper thread is A fabric pressing tool for sewing machines, which is avoided in a position not touching the needle line.

The method according to claim 5,

The first and second push projections and the inclined surface are formed around the needle through hole in a threaded piece having a needle through hole,

The method according to claim 5,

And said first and second pressing projections and said inclined surface are integrally formed with this structure in the lower portion of the structure of said fabric pressing tool having a needle through hole.

The cloth pressing tool for sewing machines according to any one of claims 2 to 7,

A needle bar keeping the needle at the bottom,

A sewing machine for holding the sewing object and having a sewing frame movable relative to the sewing needle position of the sewing needle.