JP2008168053A - Embroidery machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a safe embroidery machine which can prevent danger to a worker even if a presser foot of a head in which sewing fails is not stopped for continuing direction setting operation of presser feet of the other heads when sewing with at least one head fails during sewing by operating needles and the presser feet of a plurality of heads. <P>SOLUTION: A safety cylinder has the inside diameter allowing rotation of the presser foot while the presser foot is stored. The safety cylinder is arranged in the upper part so that the presser foot raised to a retreat position is enclosed. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to an embroidery sewing machine, and more particularly, to an embroidery sewing machine having a presser foot that is movable up and down at the outer peripheral position of a needle bar and that is reciprocally rotatable around a shaft center of the needle bar. .

Conventionally, an embroidery sewing machine including a presser foot which is movable up and down at the outer peripheral position of a needle bar and is reciprocally rotated around a shaft center of the needle bar is disclosed in Patent Document 1. It is widely known.
For example, the embroidery sewing machine disclosed in the above-mentioned Patent Document 1 can move up and down at the outer peripheral position of a needle bar provided so as to be movable up and down with respect to the head, and is directed around the axis of the needle bar. For this purpose, it is equipped with a presser foot that is reciprocally rotatable. The presser foot is connected to a second main shaft different from the first main shaft for driving the needle bar provided so as to be movable up and down, and has a reciprocating motion for turning the direction. It is supposed to be obtained.
In the embroidery sewing machine having the above-described configuration, the needle bar is driven up and down by the first main shaft, while the rotation driving for directing the nipple of the presser foot is controlled by the second main shaft separately from the vertical movement of the needle bar. It has the feature that it can be driven and the needle bar and the nipple of the presser foot are operated to sew beautiful patterns.

Japanese Patent No. 3145469 Japanese Patent No. 3016954

However, in the above-described conventional embroidery sewing machine, when sewing fails during sewing by operating the needle bar and nipple (also referred to as a cloth presser) in the head, the worker immediately and customarily about the failed head, The vertical movement of the needle bar is stopped using a separating mechanism (for example, a mechanism called a jumping mechanism) between the first main shaft and the needle bar. In this state, since the second main shaft continues to rotate, the presser foot moves up and down and continues to reciprocate around the axis of the needle bar.
In the above state, when approaching the upper surface of the cloth under the stopped needle bar or the thread under the needle bar, the reciprocating nipple is exposed, so that the fingertip is accidentally damaged. There was a danger that the hair was caught.

The purpose of the present application is to sew a beautiful pattern by operating the needle bar and the nipple of the presser foot, respectively, as well as at least during sewing by operating the needle bar and presser foot in a plurality of heads. When sewing fails for one head, it is possible to eliminate harm to the worker without stopping the presser foot for the failed head to continue the operation for directing the presser foot on the other head. The aim is to provide a safe embroidery machine that can be used.
Another object is to provide a safer embroidery sewing machine where the bobbin stands between the operator and the presser foot to prevent the operator from approaching the presser foot.
Other objects and advantages will be readily apparent from the drawings and the following description associated therewith.

  The embroidery sewing machine according to the present invention includes a plurality of heads 3, 3,... 3 juxtaposed above the bed 1, and a needle bar 12 provided on the plurality of heads 3, 3,. And a plurality of the presser foot 15 respectively disposed at the outer peripheral position of each needle bar 12 and capable of moving up and down and reciprocatingly rotating around the axis of the needle bar 12. The needle bar 12 is connected to each of the first main shaft 4 for moving the needle bar 12 up and down, and the plurality of cloth pressers 15. Separating mechanisms 4a disposed between the first main shaft 4 and each needle bar 12 in order to shut off the second main shaft 5 and the plurality of needle bars 12 from the first main shaft, respectively. In order to raise each of the presser foot 15 to the retracted position U that allows the lateral movement of the embroidery frame individually, In the embroidery sewing machine A provided with the presser foot control mechanism 25 provided in each of the pads 3, 3,... 3, the inner diameter is a dimension that allows the presser foot 15 to rotate while the presser foot 15 is housed. The cylindrical safety cylinder 70 configured as described above is arranged at an upper position where the cloth presser 15 raised to the retracted position U is surrounded.

  Preferably, a plurality of heads 3, 3,... 3 juxtaposed above the bed 1, a needle bar 12 provided on the plurality of heads 3, 3,. The presser foot 15 disposed at the outer peripheral position of each needle bar 12, movable up and down, and reciprocally rotated around the axis of the needle bar 12, and the plurality of needle bars 12, connected to each of the first main shaft 4 for moving each needle bar 12 up and down, and each of the plurality of cloth pressers 15, for reciprocatingly rotating the respective cloth pressers 15 for directing. Each of the second main shaft 5 and the plurality of needle bars 12 are separated from the first main shaft by a separating mechanism 4a disposed between the first main shaft 4 and each needle bar 12, respectively, In order to raise each presser foot 15 to the retracted position U that allows the lateral movement of the embroidery frame individually, the plurality of heads 3, 3 ..Control mechanism 25 for presser foot provided in each of 3, bobbin 47 for storing cords etc. 50, and guides for guiding cords etc. 50 sequentially issued from the bobbin 47 toward the needle drop position 1 b In the embroidery sewing machine A including the zigzag mechanism 40 including the portion 44, a cylindrical safety cylinder 70 having an inner diameter configured to allow the rotation of the presser foot 15 in a state in which the presser foot 15 is accommodated. The cloth presser 15 raised to the retracted position U is arranged at an upper position where the cloth presser 15 is surrounded, and the staggered mechanism 40 is supplied with the bobbin 47 in order to supply the cord 50 etc. from the left and right toward the needle drop position 1b. A staggered drive means 55 adapted to reciprocally rotate the guide portion 44 around the presser foot 15, and further, the bobbin 47 is individually rotated by the respective staggered drive means 55, As long as they are configured to the retainer 15 can be placed in a location that blocks the operator place the front leading edge side of the bed 1.

As described above, according to the present invention, when sewing fails for at least one head during sewing by operating the needle bar and the presser foot in the plurality of heads 3, 3... 3, the worker fails. About the head, the vertical movement of the needle bar 12 connected to the first main shaft is stopped using a detaching mechanism immediately and customarily.
Subsequently, even if it is attempted to stop the movement of the presser foot for the sake of safety, the movement of the presser foot cannot be stopped because the operation must be continued for the direction of the presser foot in the other head.
However, in the present invention, each of the plurality of heads 3, 3,... Inevitably is moved up to the retracted position U allowing the lateral movement of the embroidery frame individually. Since the presser foot control mechanism 25 is provided, if the worker uses this to raise the presser foot to the retracted position without stopping, the safety cylinder 70 is provided in advance. Therefore, the rotating presser foot 15 is surrounded by a safety cylinder and is rotated in the safety cylinder 70, so that it is possible to eliminate harm to workers and to prevent danger. effective.

  Further, although safe as described above, when the bobbin 47 is rotated by the staggered driving means 55 and the presser foot 15 is placed in a place where it is blocked from the worker place 1d on the front front edge side of the bed 1, The bobbin 47 stands between the worker and the presser foot 15, which prevents the worker from approaching the presser foot and has the effect of making it safer.

Embodiments of the present invention will be described below with reference to FIGS.
FIG. 1A shows an embroidery sewing machine, for example, an embroidery sewing machine capable of multi-head zigzag stitching. Reference numeral 1 denotes a known bed, and 2 denotes a machine frame erected on the bed 1. Reference numeral 3 denotes a plurality of heads attached to the machine frame 2 in parallel with the upper side of the bed 1, and includes a needle bar 12 as is well known. Reference numeral 1 d denotes a worker place where the worker stands when working on each bed 3 from the front front edge 1 c of the bed 1.
4 is connected to each of the plurality of needle bars 12, and is a first main shaft for moving each needle bar 12 up and down, and is provided through a plurality of heads 3, 3,. Yes.
5 is connected to each of the presser foot 15 provided in each of the plurality of heads 3, 3... 3, as is well known, and has a second main shaft for reciprocally rotating each presser foot 15 for directing. The motor is reciprocally rotated by reciprocating power of a motor (not shown).
Reference numeral 6 denotes an embroidery frame which can be moved in the X and Y directions on the upper surface 1a of the bed 1. Reference numeral 7 denotes a cloth attached to the embroidery frame 6 as is well known. Reference numeral 8 denotes a known control of the operation of the embroidery sewing machine A. The control apparatus for doing is shown.

Next, the head 3 will be described.
Reference numeral 9 denotes a sewing machine arm in the head 3, and 10 denotes a cylindrical guide bracket fixed to the sewing machine arm 9. Reference numeral 12 denotes a needle bar which is provided on the plurality of heads 3, 3... 3 so as to be movable up and down, and is linked to the first main shaft 4 via a well-known linkage mechanism (arbitrary cam, link mechanism, etc.). It is.
Further, as is well known (for example, as disclosed in Patent Document 1, in order to block the movement of each of the plurality of needle bars 12 from the first main shaft 4, the first main shaft 4 and each needle bar 12 is provided with a separation mechanism 4a (see FIG. 2A).
Reference numeral 13 denotes a needle for sewing which is attached to the lower end of the needle bar 12 and is movable up and down toward the needle drop position 1b in the bed 1 as is well known.

  Reference numeral 15 denotes a cloth presser disposed at the outer peripheral position of each needle bar 12, and is configured to be movable up and down along (in parallel with) the needle bar 12 by a cloth presser lifting mechanism 20, as is well known. As is well known, the direction turning mechanism 30 is configured to be reciprocally rotatable about the axis of the needle bar 12. Reference numeral 16 denotes a hollow nipple pipe, reference numeral 17 denotes a cloth presser member attached to the lower end of the nipple pipe 16, and reference numeral 17a denotes a presser part for pressing the cord 50 from above.

The presser foot lifting mechanism 20 will be described. Reference numeral 18 denotes a nipple ring attached to the upper end of the nipple pipe 16, reference numeral 21 which appears well in FIG. 2A denotes a nipple drive shaft arranged parallel to the needle bar 12, and known drive mechanisms 24 and 25 (24 is a pulse). 25 indicates that the motor is present, and 25 is driven up and down by a presser foot control mechanism for transmitting the rotational movement of the output shaft 24a of the motor 24 to the nipple drive shaft 21 as a vertical movement. is there.
Reference numeral 22 denotes a stroke arm whose base is attached to the nipple drive shaft 21 so as to move up and down together with the nipple drive shaft 21. The arm portion 22a of the stroke arm 22 is engaged with the engagement groove 18a of the nipple ring 18 so that power can be transmitted in the vertical direction.

  The structure of the presser foot control mechanism 25 is widely known (see, for example, Patent Document 2). In addition, what is shown by FIG. 7 shows the structure currently disclosed by patent document 2 roughly. In the figure, reference numeral 25a denotes a lever whose one end is fixed to the motor shaft 24a and whose other end is connected to the link member 25b so as to be able to bend and rotate. The lever 25c is pivotally attached to one end 25d to the stationary member and the other end. Is an engagement member 25e, which is engaged with an engagement piece 25f fixed to the nipple drive shaft 21. The link member 25b has a tip 25g rotatably connected to the middle of the lever 25c in order to transmit the rotational movement of the lever 25a to the lever 25c.

Next, the lifting / lowering means 26 (means for moving the presser foot 15 up and down in the range between the bottom dead center L and the top dead center H) using the control mechanism 25 for the presser foot will be described.
The shaft 24a of the pulse motor 24 is rotated so that the lever 25a reciprocates within the range of the arrow 76a. Then, the lever 25c reciprocates up and down within the range of the arrow 76b, and the engagement member 25e reciprocates up and down within the range of the arrow 76c. This vertical movement corresponds to the vertical movement of the presser foot 15 in the range of the bottom dead center L and the top dead center H.

Next, a retracting means 27 (means for moving the presser foot 15 to the retracted position U further above the top dead center H) using the above-described presser foot control mechanism 25 will be described.
The shaft 24a of the pulse motor 24 is rotated so that the lever 25a reciprocates within the range of the arrow 77a. Then, the lever 25c reciprocates up and down within the range of the arrow 77b, and the engagement member 25e reciprocates up and down within the range of the arrow 77c. This vertical movement corresponds to the movement of moving the presser foot 15 to the retracted position U further above the top dead center H. When the pulse motor 24 is reciprocated within the range indicated by the arrow 77d of the lever 25a, the nipple drive shaft 21 does not descend even when power is not sent to the motor.

  As can be understood from FIGS. 1 and 2, the control mechanism 25 for the presser foot includes a plurality of heads 3, 3 and 3 for raising the presser foot 15 to a retracted position U that allows the embroidery frame to individually move laterally. ... 3 are provided respectively.

The reciprocating rotation of the output shaft 24a of the motor 24 is transmitted through the control mechanism 25, the nipple drive shaft 21, the stroke arm 22, and the nipple ring 18 by using the presser foot lifting mechanism 20, and the presser foot 15 is moved up and down the needle 13. The range of the bottom dead center L and the top dead center H can be moved up and down at a predetermined timing with respect to the operation (see FIG. 3).
Further, as is well known, the rotation of the output shaft 24a of the motor 24 is transmitted through the control mechanism 25, the nipple drive shaft 21, the stroke arm 22, and the nipple ring 18 by using the presser foot lifting mechanism 20, and the presser foot 15 Is moved to a retracted position U further above the top dead center H, so that a space S for moving the embroidery frame 6 can be created on the bed 1.

Next, the direction turning mechanism 30 for controlling the direction so that the presser portion 17a of the presser foot 15 can always hold the cord 50 or the like at the bottom dead center L will be described. .
Reference numeral 32 shown in FIG. 2 is a transmission shaft that is rotatably supported by a bearing 33. One end of the transmission shaft 32 is connected to the second main shaft 5 via a pair of transmission gears 31, 31. Reference numeral 34 denotes a transmission gear attached to the other end of the transmission shaft 32, 35 denotes a transmission gear attached so as to be rotatable with respect to the outer periphery of the upper portion of the guide bracket 10, and the transmission gears 34 and 35 are engaged with each other. Reference numeral 37 denotes a locking piece (rotary guide) integrally provided on the upper surface of the transmission gear 35, and is formed in a protruding shape in the axial direction of the transmission gear 35 as can be understood from FIG. The front end of the locking piece 37 is engaged with a groove 16a formed on the outer periphery of the nipple pipe 16 so as to be vertically movable. When the second main shaft 5 is reciprocally rotated, the nipple pipe 16 is reciprocated through the transmission gears 31 and 31, the transmission shaft 32, the transmission gears 34 and 35, and the locking piece 37, and the presser portion 17a of the presser foot member 17 is rotated. Can control the direction.

Next, a staggered mechanism 40 for supplying embroidery materials such as decorative yarns, strings, tapes, bead material threads, etc. (referred to as “codes”) to the cloth by swinging them at a position under the needle will be described. .
The staggered mechanism 40 includes a staggered guide member 41 for guiding a cord or the like toward the needle drop position 1b, a bobbin 47 for storing the cord 50 or the like in a wound state, and a staggered drive means 55.
The staggered guide member 41 is fixed to an outer periphery of a transmission portion 58b of a pulley 58, which will be described later, with any fixing means, for example, riveting, and reciprocally rotates together with the pulley 58. The staggered guide member 41 is configured by connecting a plurality of separate members (members 41a, 41b, 41c). Reference numeral 42 denotes a vertically long through hole for adjusting the height of the guide portion 44 formed on the member 41b, and 43 denotes the presence of an adjusting screw for adjusting the expansion and contraction of the member 41b and the member 41c. The height of the portion 44 can be changed.
Reference numeral 46 denotes an adjustment screw. When the staggered guide member 41 is not used or when the embroidery frame 6 is moved, the lower portion of the member 41c is turned up and down by using the adjustment screw 46 as a fulcrum to obstruct the guide portion 44. It is designed to be able to retreat to a high position that does not become.

  The bobbin 47 is provided at the outer peripheral position of each of the presser foot 15 so as to be reciprocally rotatable around the presser foot 15 by the staggered driving means 55. Reference numeral 48 denotes a bobbin support that rotatably supports the bobbin 47, and is integrally attached to the outer periphery of the transmission portion 58 b via the base portion of the staggered guide member 41.

Next, a staggered driving means 55 for reciprocally driving the staggered guide member 41 and the bobbin 47 around the presser foot 15 will be described (see FIG. 2). Reference numeral 56 denotes a known motor, and 57 denotes a pulley connected to a drive shaft 56 a of the motor 56. Reference numeral 58 denotes a pulley that is rotatably attached to the outer periphery of the guide bracket 10 and includes a cylindrical transmission portion 68b at the lower portion. Reference numeral 59 denotes a timing belt wound around the pulleys 57 and 58. As the drive shaft 56a is reciprocally rotated by the motor, the pulley 57, the timing belt 59, and the pulley 58 are rotated to drive the staggered guide member 41 and the bobbin 47 to reciprocate.
Further, by the reciprocating rotation as described above, the guide portion 44 of the staggered guide member 41 moves the cord 50 or the like around the needle drop position 1b from the center (position C in FIG. 4B) to the left (FIG. 4). (B in the direction of L) or to the right (in the direction of R in FIG. 4B) alternately rotate,
By swaying the cord or the like around the needle drop position 1b, the cord or the like is sewn on the cloth without causing the cord or the like to fall into the needle itself.
The timing of the pivoting operation of the guide portion 44 is between the time when the presser foot 15 is pressing the cord or the like and the time when the presser foot is pressing the cord or the like in the next step. (See FIG. 3).
In each head 3, the bobbin 47 is rotated as necessary by the staggered driving means 55 provided in each head 3, and the work clamp 15 is individually moved to the worker on the front front edge side 1 c of the bed 1. What is necessary is just to enable it to specify a stop position by arbitrary means, such as stopping the motor 56, so that it may be fixed (stop) in the place blocked from the place 1d.
In addition, the instruction | indication of related operation | movement of the needle | hook 13, the work clamp 15, the embroidery frame 6, the zigzag mechanism 40, etc. should just be performed by computer control by the control apparatus 8, as is well-known.

Reference numeral 70 denotes a cylindrical safety cylinder fixed to the outer periphery of the transmission portion 58b in the pulley 58, and has a substantially C-shaped cross section (see FIGS. 5B and 6B). . The safety cylinder 70 is configured such that the inner diameter W allows rotation in a state where the presser foot 15 is housed, and the arrangement is such that the presser foot 15 raised to the retracted position U is surrounded as shown in the figure. (See FIG. 5).
Reference numeral 74 denotes a groove for maintenance (for needle replacement at the top dead center of the needle bar and threading). The vertical length and horizontal width of the groove allow maintenance such as threading but do not allow fingers to enter. It is good to set it as a dimension (for example, length: 30 mm, width: 7 mm).
In addition, although the shape of the safety cylinder 70 is illustrated as having a substantially C-shaped cross section so as to avoid the mounting portion of the staggered guide member 41 on the outer periphery of the transmission portion 58b, the cross section is formed in a circular shape. May be. In that case, the staggered guide member 41 may be attached by attaching the base part to the transmission part 58b via the safety cylinder 70.

A case will be described in which at least one head 3 fails to be sewn during sewing by operating the needle bar and the presser foot in the plurality of heads 3, 3.
The worker stops the vertical movement of the needle bar 12 connected to the first main spindle 4 by using the separating mechanism 4a as is normally done in an immediate and customary manner for the failed head 3a.
Subsequently, the worker raises the presser foot 15 in the head 3a to the retracted position U using the presser foot control mechanism 25 for raising the presser foot 15 to the retracted position U (see FIG. 5). Then, the safety cylinder 70 is provided in a surrounding state around the presser foot 15 in the retracted position U, and the presser foot 15 that continues to reciprocate is reciprocated in the direction of the arrow 86 within the safety cylinder 70. Become.
This has a safety effect of preventing danger without interfering with the reciprocating rotation of the other heads 3 which are normally sewn for reciprocating the cloth pressers 15.

Although safe as described above, the bobbin 47 is rotated in the direction of arrow 87 by using the staggered driving means 55, and the work clamp 15 is moved to the worker on the front front edge 1 c side of the bed 1. When it is placed in a place where it is blocked from the place 1d (see FIG. 6), since the bobbin 47 stands in front of the work clamp 15 with respect to the work place 1d, it prevents the worker from approaching the work clamp. It is safe.

The schematic perspective view of a multi-head sewing machine. BRIEF DESCRIPTION OF THE DRAWINGS It is the schematic for embroidery sewing machine, (A) is the front view which expressed the head in the embroidery sewing machine partly fractured, (B) is the left sectional view which represented the head partly fractured (note cloth The presser foot was omitted). FIG. 5 is a diagram for explaining the relationship among the operations of a needle, a presser foot, an embroidery frame, and a staggered guide member in an embroidery sewing machine, and shows the operation of various parts during the main shaft rotates three times. Schematic diagram for explaining an embroidery sewing machine at the time of sewing, (A) is a partially broken schematic diagram for explaining the relationship between a needle, a cloth presser, a bobbin and a staggered guide member in a staggered mechanism, and a safety cylinder. , (B) is a schematic diagram for explaining the relationship between a needle drop position, a guide portion, and a bobbin when a cord or the like is sewn on a cloth by zigzag stitching. (A) shows a partially broken schematic view for explaining the relationship between the presser foot in a state where the presser foot is raised to the retracted position, the bobbin in the staggered mechanism, and the safety cylinder, and (B) is (A) VV sectional view taken on the line (note that the staggered guide member, bobbin support, pulley, etc. are omitted). The bobbin is rotated to show a schematic front view partly broken for explaining the case where the presser foot is placed in a place where it is blocked from the worker's place on the front front edge side of the bed, (B) is a VI in (A) -VI sectional drawing (In addition, the zigzag guide member, the bobbin support tool, the bobbin, the pulley, etc. were abbreviate | omitted). The schematic mechanism figure of the control mechanism of a work clamp.

Explanation of symbols

A ... embroidery sewing machine, 1 ... bed, 2 ... machine frame, 3 ... head, 4 ... first spindle, 5 ... second spindle, 6 ... embroidery frame, 7 ... Cloth, 9 ... Arm, 10 ... Guide bracket, 12 ... Needle bar, 13 ... Needle, 15 ... Work clamp, 16 ... Nipple pipe, 17 ... Cloth Presser member, 18 ... Nipple ring, 20 ... Cloth presser lifting mechanism, 21 ... Nipple drive shaft, 22 ... Stroke arm, 22b ... Arm part, 24 ... Motor, 25 ... · Control mechanism of the presser foot, 30 · · · Direction turning mechanism, 31 · · · Transmission gear, 32 · · · Transmission shaft, 33 · · · Bearing, 34 and 35 · · · Transmission gear, 37 · · · Locking piece (rotary guide), 40 ... staggered mechanism, 41 ... staggered guide member, 44 ... guide part, 47 ... bobbin 48 ... holder, 55 ... staggered driving means, 70 ... safety tube

Claims (2)

A plurality of heads juxtaposed above the bed;
A needle bar provided on each of the plurality of heads to freely move up and down;
A presser foot which is arranged at each outer peripheral position of each of the needle bars, and can be moved up and down, and reciprocally rotated around a shaft center of the needle bar.
A first main shaft that is linked to each of the plurality of needle bars and moves each needle bar up and down;
A second main shaft connected to each of the plurality of pressers, and for reciprocally rotating each presser foot for directing;
A separation mechanism disposed between the first main shaft and each needle bar in order to shut off each of the plurality of needle bars from the first main shaft;
In the embroidery sewing machine comprising the presser foot control mechanisms respectively provided in the plurality of heads in order to raise each of the presser foot to a retracted position allowing the lateral movement of the embroidery frame individually.
A cylindrical safety cylinder having an inner diameter configured to allow rotation of the presser foot in a state where the presser foot is housed is disposed at an upper position where the presser foot raised to the retracted position is surrounded. An embroidery sewing machine characterized by that. A plurality of heads juxtaposed above the bed;
A needle bar provided on each of the plurality of heads to freely move up and down;
A presser foot which is arranged at each outer peripheral position of each of the needle bars, and can be moved up and down, and reciprocally rotated around a shaft center of the needle bar.
A first main shaft that is linked to each of the plurality of needle bars and moves each needle bar up and down;
A second main shaft connected to each of the plurality of pressers, and for reciprocally rotating each presser foot for directing;
A separation mechanism disposed between the first main shaft and each needle bar in order to shut off each of the plurality of needle bars from the first main shaft;
In order to raise each of the presser foot to a retracted position that allows lateral movement of the embroidery frame individually, a presser foot control mechanism provided in each of the plurality of heads;
In an embroidery sewing machine comprising a bobbin for storing a cord and the like and a staggered mechanism comprising a guide part for guiding a cord and the like sequentially issued from the bobbin toward the needle drop position,
A cylindrical safety cylinder having an inner diameter configured to allow rotation of the presser foot in a state where the presser foot is housed is disposed at an upper position where the presser foot raised to the retracted position is surrounded. ,
The staggered mechanism includes a staggered driving means for reciprocally turning the bobbin and the guide portion around the presser foot in order to supply the coat from the left and right toward the needle drop position,
Further, the embroidery sewing machine is configured so that the bobbin can be individually rotated by the respective staggered driving means so that the presser foot can be placed at a place where it is blocked from the worker's place on the front front edge side of the bed.

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