JP2006087657A - Needle plate apparatus sewing machine, and embroidery frame supporting apparatus for sewing machine, - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To realize a needle plate apparatus where an embroidery frame is prevented from falling forward by simple constitution and inexpensively. <P>SOLUTION: The needle plate apparatus is provided with: needle plate body 7 where a needle plate part 7b arranged on the upper surface part of a cylinder bed 4 and a horizontal needle plate extension part 7c extended to the front of a cylinder bed 4 from the front end of the needle plate part 7b for supporting the front side frame part of the embroidery frame 20; and a support leg 26 for supporting the front end of the needle plate extension part 7c. The support leg 26 is connected by a hinge mechanism 30 at the front end of the needle plate extension part 7c in a state where it can be switched into a supporting posture in a vertical direction or a folded posture of being folded toward the side of the needle plate extension part 7c, and the support leg 26 has a length adjusting mechanism 35 for adjusting the length. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  In the present invention, a needle plate disposed on the upper surface of a cylinder bed extending from the bed portion of the sewing machine is extended forward to support the front frame of the embroidery frame, and the front end of the needle plate is supported by a support leg. It relates to what is supported on the workbench.

  Conventionally, an electronically controlled sewing machine capable of embroidery sewing has an embroidery frame moving mechanism for moving the embroidery frame in two orthogonal directions (XY directions) so that various patterns can be easily embroidery-sewn on the cloth held on the embroidery frame. It has become.

  By the way, when a flat embroidery frame for holding a flat cloth such as a handkerchief is used in an embroidery sewing machine having a cylinder bed capable of embroidery sewing on a tubular object such as a T-shirt, the sewing range of the embroidery frame is limited. Depending on the sewing position, the front frame portion of the embroidery frame may move forward from the tip portion of the cylinder bed. In such a case, due to the weight of the embroidery frame and the weight of the cloth held by the embroidery frame, a so-called forward tilt occurs in which the front frame part falls below the upper surface of the cylinder bed, and the embroidery frame is inclined. There is a problem that sewing deviation (pattern deviation) occurs in the embroidery pattern. Further, when the embroidery frame is retracted to the cylinder bed side in the forwardly tilted state, the front frame portion in the forwardly tilted state collides with the tip of the cylinder bed.

  Therefore, various support devices for supporting the embroidery frame from below have been proposed so that the embroidery frame does not fall forward. For example, the sewing machine disclosed in Patent Document 1 forms a cylinder bed in which a cylindrical table having a needle plate is fixed to a bed portion of the sewing machine with a plurality of bolts, so that an embroidery frame on which a work cloth is set can be supported by the table. It is. However, the work hole for removing the bobbin case is formed in the bottom plate on the lower side of the table.

It is also conceivable to support an embroidery frame by mounting an auxiliary table on the sewing machine bed. For example, the auxiliary table of the portable sewing machine of Patent Document 2 is configured by connecting a pair of front and rear table plates so that they can be folded, and when used, a plurality of sealing pins on the auxiliary table side are sealed on the corresponding sewing machine side. By locking to the metal fittings, the support table is raised after the auxiliary table is mounted on the sewing machine bed through its storage part, while the auxiliary table is removed and folded in the reverse order of the mounting order so that it can be stored and stored compactly. It is.
JP-A-3-207392 (Pages 2 and 3, FIGS. 1 and 2) Japanese Utility Model Publication No.59-20235 (pages 2 to 5, FIGS. 1 to 3)

  In the sewing machine described in Patent Document 1, the cylindrical table is fixed with a plurality of bolts each time embroidery stitching is performed. Since the base is fixed at the base end with bolts, it is necessary to increase the rigidity by increasing the thickness of the table, especially at the base end, which not only increases the weight of the table but also increases the cost. Further, since the bobbin case is removed through the work hole on the lower surface of the table, there are problems such as poor workability.

  Further, in the sewing machine described in Patent Document 1, since the cross-sectional area of the cylindrical table is large, the size of the cylindrical cloth set on the embroidery frame is limited, and the bottom surface of the embroidery frame and the cylindrical Since the contact area with the upper surface of the table increases, the frictional resistance when the embroidery frame moves increases, and there is a problem that the positioning accuracy of the embroidery frame decreases.

  In the auxiliary table of the portable sewing machine described in Patent Document 2, the auxiliary table is configured by providing a plurality of sealing pins on a pair of table plates, and a plurality of sealing metal fittings are provided on the sewing machine side. The number of points increases, which not only complicates the assembling work, but also increases the cost of manufacturing the auxiliary table. If the height of the auxiliary table cannot be adjusted and a difference occurs, the embroidery frame and the auxiliary are moved when the embroidery frame is moved. There are problems such as the possibility of collision with the table or the bed.

  A needle plate device for a sewing machine according to claim 1, wherein the needle plate device for the sewing machine includes an embroidery frame moving means capable of independently moving an embroidery frame holding a cloth to be embroidered in two orthogonal directions and a cylinder bed. The needle plate portion disposed on the upper surface portion of the needle plate and having a needle hole and the front end portion of the embroidery frame are extended from the front end of the needle plate portion forward in the length direction of the cylinder bed (ie, in the extending direction). A needle plate body integrally formed with a horizontal needle plate extension and a support leg for supporting a front end portion of the needle plate extension.

  A needle plate portion disposed on the upper surface of the cylinder bed and a needle plate extension portion extending from the front end of the needle plate portion are integrally formed, and the front end portion of the needle plate extension portion has a predetermined height by a support leg. Therefore, when the embroidery frame moves in sliding contact with the upper surface of the cylinder bed and the upper surface of the needle plate during the sewing operation, the front frame portion of the embroidery frame does not fall down smoothly. Moving.

  A needle plate device for a sewing machine according to a second aspect of the present invention is the sewing machine according to the second aspect, wherein the support leg is connected to a front end portion of the needle plate extension portion by a hinge mechanism so as to support a vertical orientation and a needle plate extension portion. It is configured to be switchable to a folded posture folded to the side.

  A needle plate device for a sewing machine according to a third aspect is the sewing machine according to the first or second aspect, wherein the support leg has a length adjusting mechanism for adjusting the length thereof.

  A throat plate device for a sewing machine according to a fourth aspect of the present invention is the sewing machine according to any one of the first to third aspects, wherein the throat plate extension portion projects forward by a predetermined dimension from the foremost end position of the movement range of the embroidery frame. Is set.

  The embroidery frame supporting device according to claim 5 is an embroidery frame moving means capable of independently moving an embroidery frame holding a cloth to be embroidered in two orthogonal directions, a cylinder bed, and a front end upper surface portion in the extending direction of the cylinder bed. In the embroidery frame support device used for a sewing machine having a needle plate disposed on the front side of the cylinder bed, the cylinder bed is attached near the front end of the cylinder bed, and the cylinder bed extends in front to support the front frame portion of the embroidery frame. A plate-like support member extending in the direction and a support leg for supporting the front end of the support member, and the width of the support member is shorter than the width of the cylinder bed in the direction perpendicular to the extending direction of the cylinder bed in the horizontal direction It is.

  Since the front end of the support member arranged so as to extend from the vicinity of the front end of the cylinder bed to the front in the extending direction of the cylinder bed is supported at a predetermined height by the support legs, the embroidery frame is attached to the upper surface of the cylinder bed along with the sewing work. And when moving while sliding on the upper surface of the support member, the front frame portion of the embroidery frame does not fall. In addition, since the width of the support member is shorter than the width of the cylinder bed, the frictional resistance when the embroidery frame moves on the upper surface of the support member is reduced, and the embroidery frame moves smoothly.

  An embroidery frame support device according to a sixth aspect of the present invention is the embroidery frame support device according to the fifth aspect, wherein the upper surface of the support member for supporting the front frame portion of the embroidery frame is substantially flush with the upper surface of the needle plate. It is attached to the needle plate.

  According to a seventh aspect of the present invention, in the embroidery frame support device according to the fifth or sixth aspect of the present invention, the width of the support member is shorter than the width of the needle plate in the orthogonal direction.

  According to the first aspect of the present invention, the length direction of the cylinder bed from the front end of the needle plate portion to support the needle plate portion disposed on the upper surface portion of the cylinder bed and having a needle hole and the front frame portion of the embroidery frame. Since it has a needle plate body that is integrally formed with a horizontal needle plate extension that extends forward (ie, forward in the direction of extension) and a support leg that supports the front end of the needle plate extension, When the embroidery frame moves while sliding on the upper surface of the cylinder bed and the upper surface of the needle plate body, the front frame portion of the embroidery frame moves smoothly without lowering. In addition, the collision between the front side frame portion of the embroidery frame and the cylinder bed can be reliably prevented.

  In addition, the needle plate device can be simply structured by providing a needle plate body and support legs, and the number of parts is small, and the rigidity of the needle plate body is not particularly required. It becomes possible.

  According to the invention of claim 2, the support leg is connected to the front end portion of the needle plate extension by a hinge mechanism, and can be switched between a vertical support posture and a folding posture folded toward the needle plate extension. Even if the embroidery frame is a cylindrical frame and holds a tubular sewing product such as a T-shirt, the tubular sewing product is mounted after the embroidery frame is mounted on the sewing machine with the support legs folded. The support legs can be pulled out from the inside of the tubular sewing product while being crossed and supported by switching to a vertical support posture, and embroidery sewing can be performed on various sewing objects. Other effects similar to those of the first aspect are obtained.

  According to the invention of claim 3, since the support leg has a length adjusting mechanism for adjusting the length thereof, the height of the front end portion of the extension needle plate portion is set to the height of the upper surface of the cylinder bed. Fine adjustment is possible to match. Other effects similar to those of the first or second aspect are achieved.

  According to the invention of claim 4, the throat plate extension is set to a length that projects forward by a predetermined dimension from the foremost end position of the movement range of the embroidery frame, so that the embroidery frame moves to the foremost end position. Even in this case, the front frame portion of the embroidery frame can be reliably supported by the needle plate extension. Further, the larger the predetermined dimension protruding forward than the front end position of the movement range of the embroidery frame, the easier it is to switch the support leg to the support posture, and embroidery sewing to a small tubular sewing product becomes possible. Other effects similar to those of any one of claims 1 to 3 are provided.

  According to the invention of claim 5, a plate-like support member that is attached near the front end of the cylinder bed and extends forward in the extending direction of the cylinder bed to support the front frame portion of the embroidery frame, and the front end portion of the support member The support member is shorter than the width of the cylinder bed in the horizontal direction perpendicular to the cylinder bed extension direction, so that the embroidery frame supports the upper surface of the cylinder bed and the support along with the sewing work. When moving while sliding on the upper surface of the member, the front frame of the embroidery frame moves smoothly without lowering, so the sewing frame of the embroidery pattern (pattern displacement) or the collision between the front frame of the embroidery frame and the cylinder bed Can be reliably prevented.

  Furthermore, since the width of the support member is shorter than the width of the cylinder bed, the frictional resistance when the embroidery frame moves on the upper surface of the support member is reduced, and the embroidery frame is affected by the weight of the embroidery frame itself and the cloth held on it. Therefore, the positioning accuracy after the movement of the embroidery frame can be remarkably improved. In addition, since the support device can be simply structured by simply providing the support member and the support legs, the number of parts is small, and the rigidity of the support member is not particularly required, so that the support device can be made compact and low in cost.

  According to the invention of claim 6, the support member is attached to the needle plate so that the upper surface for supporting the front frame portion of the embroidery frame is substantially the same height as the upper surface of the needle plate. In addition to simplifying the attaching operation to the needle plate, smooth movement of the embroidery frame over the needle plate upper surface and the support member upper surface can be realized. Other effects similar to those of the fifth aspect are obtained.

  According to the invention of claim 7, since the width of the support member is shorter than the width of the needle plate in the orthogonal direction, the frictional resistance when the embroidery frame moves on the upper surface of the support member can be reduced as much as possible. The positioning accuracy after the movement of the frame can be greatly increased. Other effects similar to those of the fifth or sixth aspect are achieved.

  The needle plate device of the sewing machine in the present embodiment has a needle plate body that supports the front frame portion of the embroidery frame by extending the needle plate portion having a needle hole forward, and further supports the front end portion of the needle plate body as a support leg. I support it.

  First, the multi-needle type embroidery sewing machine M to which the embroidery frame 20 is attached will be described. As shown in FIG. 1, the embroidery sewing machine M is placed on a work table T, and a pair of left and right support tables 1 that support the embroidery sewing machine M, and a pedestal that stands upright at the rear end of the support table 1. The left and right ends of the pair 2, the arm 3 extending forward from the pedestal 2, the cylinder bed 4 provided in parallel to the arm 3 below the arm 3, and the pair of support bases 1. It has a carriage 5 supported so as to be movable back and forth, and a needle bar case 6 attached to the tip of the arm portion 3 so as to be movable in the left-right direction.

  A stepped portion is formed on the front end side portion of the upper surface of the cylinder bed 4, and a rear end side portion of the needle plate body 7 extending in the front-rear direction, that is, a needle plate portion 7 b in which a needle hole 7 a is formed, is formed on the stepped portion. 8 is fixed. Here, as will be described later, the needle plate body 7 also serves as a part of the needle plate device 25.

  The needle bar case 6 has a needle bar selection mechanism (not shown) for selecting one of a plurality of needle bars 10 having a sewing needle 9 (only one is shown) attached to the lower end portion. The needle bar case 6 is moved left and right by the needle bar selection mechanism, and one needle bar 10 for sewing is selected, and only the selected needle bar 10 is driven up and down.

  Therefore, an embroidery frame 20 to be described later is moved in the left-right direction (X direction) and the front-rear direction (Y direction), and the sewing needle 10 that moves up and down and a thread catcher (not shown) provided on the cylinder bed 4 are arranged. By the cooperation, an embroidery pattern is sewn on the tubular sewing product 24 to be embroidered such as a T-shirt held in the embroidery frame 20.

  Next, the carriage 5 provided so that the frame holders 15 and 16 for mounting the embroidery frame 20 can be moved in the left-right direction will be briefly described. As shown in FIG. 2, the carriage 5 is moved and driven in the front-rear direction (Y direction) via a Y direction drive mechanism by a Y direction drive motor (not shown) provided inside the support base 1. The carriage 5 is equipped with a holder drive member 13 that can move in the left-right direction (X direction) and an X-direction drive mechanism that moves the holder drive member 13 in the left-right direction by an X-direction drive motor. .

  A connecting member 14 extending in the left-right direction is fixed to the holder driving member 13, and frame holders 15, 16 are fixed to the left and right ends of the connecting member 14 in a detachable manner. Here, a Y-direction drive motor and a Y-direction drive mechanism for moving the carriage 5 in the front-rear direction (Y direction), a holder drive member 13 and a connecting member 14 provided on the carriage 5, and these in the left-right direction (X direction). An embroidery frame moving means is constituted by the X-direction driving motor and the X-direction driving mechanism to be moved.

  An embroidery frame 20 to be described later can be detachably attached to a pair of left and right frame holders 15 and 16 via a connecting member 23 fixed to the embroidery frame 20. The rear end portions of the leaf spring members 17 that hold the connecting members 23 from the upper side with elastic force and hold them in predetermined positions are fixed to the front end portions of the pair of left and right frame holders 15 and 16, respectively.

  Next, an embroidery frame 20 for a cylinder that holds a cylinder sewing product 24 to be embroidered such as a T-shirt and is used for embroidery sewing will be described. As shown in FIG. 2, the embroidery frame 20 includes a rounded outer frame 21 having a rectangular frame shape and an inner frame 22 that is fitted inside the outer frame 21.

  The inner end portions of the connecting members 23 are respectively fixed to the left frame portion 22a and the right frame portion 22b of the inner frame 22, and the outer end portions of the connecting members 23 are attached to and detached from the frame holders 15 and 16 via the leaf spring members 17, respectively. It is installed as possible. Here, the embroidery area E inside the embroidery frame 20 is indicated by a rectangular two-dot chain line.

  Next, the throat plate device 25 that supports the front end of the embroidery frame 20 will be described. As shown in FIGS. 1 to 4, the needle plate device 25 includes a needle plate portion 7 b fixed to the upper surface portion of the front end portion of the cylinder bed 4 described above, and a horizontal extending forward from the front end of the needle plate portion 7 b. A metallic needle plate body 7 integrally formed with the needle plate extension 7c, and a support leg 26 for supporting the front end portion of the needle plate extension 7c from below.

  As shown in FIGS. 2 and 6, the width of the needle plate 7 is set slightly smaller than the width of the cylinder bed 4, and there is no step between the upper surface of the cylinder bed 4 and the upper surface of the needle plate 7. And flat. Moreover, the throat plate extension 7c is set to a length that projects forward by a predetermined dimension D to the front side of the front end position of the movement range of the embroidery frame 20 (shown by a two-dot chain line in FIGS. 2 and 3). Yes.

  Therefore, when the embroidery frame 20 is mounted on the frame holders 15 and 16 via the connecting members 23, the rear frame portion 20a of the embroidery frame 20 moves while sliding on the upper surface of the cylinder bed 4, and the embroidery frame 20 The front frame portion 20b moves without detaching from the throat plate extension 7c while sliding on the upper surface of the throat plate extension 7c.

  The support leg 26 is made of a metallic plate member having the same width as that of the needle plate body 7, and at the upper end portion thereof, the support mechanism 26 can be rotated by the hinge mechanism 30 to the front end portion of the needle plate extension portion 7 c (the posture can be switched). It is pivotally supported.

  Next, the hinge mechanism 30 that pivotally supports the support leg 26 at the front end of the needle plate extension 7c of the needle plate body 7 will be described. As shown in FIGS. 3 to 5, a pair of left and right pivot portions 7 d are bent downward at the front end of the needle plate extension 7 c, and a pair of left and right pivot portions 26 a are rearward at the upper end of the support leg 26. It is bent and formed.

  The pair of left and right pivots 26a of the support leg 26 are located inside the pair of left and right pivots 7d of the needle plate extension 7c, and the pivot pins 31 are inserted through these four pivots 7d and 26a. At the upper end of the support leg 26, it can be switched between a vertically supported posture shown by a solid line in FIG. 4 and a folded posture folded in parallel to the throat plate extension 7c side as shown by a two-dot chain line in FIG. It has become.

  Here, as shown in FIGS. 6 and 7, the upper end of the substantially portal holding member 33 is fixed to the lower surface of the needle plate extension 7 c with screws 34, and the support leg 26 is switched to the folded position. The support leg 26 can be held in a folded position by engagement with an engaging portion 33 a formed by bending at the lower end portion of the holding member 33.

  Next, the length adjusting mechanism 35 provided at the lower end of the support leg 26 will be described. As shown in FIGS. 3 to 5, the lower end portion of the support leg 26 is bent backward to form the support portion 26b, and the screw portion 36a of the height adjusting screw 36 is screwed into the screw hole formed in the support portion 26b. The nut 37 is screwed to the screw portion 36a immediately below the support portion 26b. Therefore, when the nut 37 is loosened and the height adjusting screw 36 is rotated clockwise or counterclockwise in plan view, the dimensions to the lower end of the support portion 26b and the height adjusting screw 36 are changed. The length dimension of the support leg 26, that is, the height position of the front end portion of the needle plate extension 7c can be finely adjusted.

  Next, the operation of the needle plate device 25 configured as described above will be described.

  In embroidery sewing, first, as shown in FIGS. 1 and 2, an embroidery frame 20 holding a tubular sewing product 24 (for example, a T-shirt) to be sewn is attached to frame holders 15 and 16 via connecting members 23. When each is mounted, the rear frame portion 20a of the embroidery frame 20 is placed on the upper surface of the cylinder bed 4, and the front frame portion 20b of the embroidery frame 20 is placed on the upper surface of the needle plate extension 7c.

  Next, as shown in FIGS. 1 and 3, the rear end portion of the support leg 26 is attached to the cylinder while pulling backward the tubular cloth portion hanging down from the embroidery frame 20 of the tubular sewing product 24. The hanging cloth portions of the sewing product 24 are crossed and pulled downward, and the folding posture shown by the two-dot chain line in FIGS. 3 and 4 is switched to the supporting posture shown by the solid line.

  At this time, if the height of the front end of the needle plate extension 7c is lower or higher than the upper surface of the cylinder bed 4, the nut 37 of the length adjusting mechanism 35 is loosened and the height adjusting screw 36 is flattened. The height position of the front end portion of the needle plate extension 7c can be finely adjusted by turning counterclockwise or clockwise as viewed, and finally the nut 37 is tightened.

  When embroidery sewing is started in this state, the embroidery frame 20 is moved in the left-right direction via the X-direction drive mechanism by the drive of the X-direction drive motor, and via the Y-direction drive mechanism by the drive of the Y-direction drive motor. The rear frame portion 20a of the embroidery frame 20 moves while sliding on the upper surface of the cylinder bed 4, and the front frame portion 20b of the embroidery frame 20 is moved to a predetermined height position by the support legs 26. The needle plate extension portion 7c held on the upper surface of the needle plate extension portion 7c is slidably brought into contact with the needle plate extension portion 7c while maintaining the horizontal state without moving.

  As described above, the needle plate portion 7b disposed on the upper surface portion of the cylinder bed 4 and having the needle hole 7a and the front frame portion 20b of the embroidery frame 20 are extended forward from the front end of the needle plate portion 7b. Since the needle plate body 7 integrally formed with the horizontal needle plate extension portion 7c and the support leg 26 for supporting the front end portion of the needle plate extension portion 7c are provided, the embroidery frame 20 is attached to the cylinder along with the sewing work. When moving while sliding the upper surface of the bed 4 and the upper surface of the needle plate body 7, the front frame portion 20 b of the embroidery frame 20 moves smoothly without lowering. Collision between the front side frame portion 20b of the 20 and the cylinder bed 4 can be reliably prevented.

  In addition, since the needle plate device 25 can be simply structured by providing the needle plate body 7 and the support legs 26, the number of parts is small, and the rigidity of the needle plate body 7 is not particularly required. Cost reduction is possible.

  The support leg 26 is connected to the front end of the throat plate extension 7c by a hinge mechanism 30 so as to be switchable between a vertically supported posture and a folded posture folded in parallel to the throat plate extension 7c. Therefore, even when the embroidery frame 20 is a cylindrical frame and holds a tubular sewing product 24 such as a T-shirt, the embroidery frame 20 is mounted on the embroidery sewing machine M with the support legs 26 in the folded position. The support leg 26 can be pulled out from the inside of the tubular sewing product 24 while being exchanged with the sewing product 24, and can be supported by switching to a vertical supporting posture, and embroidery sewing can be performed on various sewing objects. Become.

  Further, since the support leg 26 has a length adjusting mechanism 35 for adjusting the length thereof, the height of the front end portion of the extension needle plate portion 7c is slightly adjusted to the height of the upper surface of the cylinder bed 4. Adjustment is possible.

  Further, since the needle plate extension 7c is set to a length that projects forward by a predetermined dimension D from the frontmost end position of the movement range of the embroidery frame 20, even when the embroidery frame 20 moves to the frontmost end position, The front frame portion 20b of the embroidery frame 20 can be reliably supported by the throat plate extension 7c. Further, the larger the predetermined dimension D projecting forward than the foremost position of the movement range of the embroidery frame 20 is, the easier it is to switch the support leg 26 to the support posture, and embroidery sewing to the small tubular sewing product 24 becomes possible. .

  Next, a modified form of the embodiment will be described.

  1) The support leg 26 is configured to be foldable into two via a hinge mechanism provided at the middle step in the height direction, and the support leg 26 is switched to a folding posture in a state of being folded into two via the hinge mechanism. You may do it. In this case, even when the tubular sewing product 24 is held in the embroidery frame 20, the support legs 26 can be easily pulled out from the inside of the tubular sewing product 24, and the workability is further improved.

  2] A length adjusting mechanism for adjusting the length of the support leg 26 may be provided at the upper end of the support leg 26 or at the middle stage.

  3) The support leg 26 is composed of two split support legs that are divided into two in the width direction, and one split support leg is changed so as to shift the vertical height position with respect to the other support leg. The length may be changed.

  4] When the support leg 26 is folded and switched to the folding position, the support leg 26 may not be parallel to the throat plate extension 7c side but may be inclined downward.

  5] Instead of the throat plate device 25 that supports the front end portion of the embroidery frame 20, the support device 40 shown in FIGS. Next, the support device 40 will be described. The same reference numerals are given to the same structures as those of the above-described embodiment, and the description thereof will be omitted.

  The support device 40 is attached in the vicinity of the front end of the cylinder bed 4 and extends in front of the cylinder bed 4 in the extending direction in order to support the front frame portion 20b of the embroidery frame 20; And a support leg 26A for supporting the front end portion.

  As shown in FIGS. 8 and 10, a needle plate 7 </ b> A that is rectangular in plan view and has a needle hole 7 a is fixed to the upper surface of the front end of the cylinder bed 4, that is, the front end upper surface in the extending direction, with screws 8. The front end portion of the needle plate 7 </ b> A protrudes more forward than the front end of the cylinder bed 4. A belt-like support member 41 is disposed in the front-rear direction on the front side of the needle plate 7A, and the stepped rear end portion of the support member 41 is fixed to the lower side of the front end portion of the needle plate 7A with screws 42. .

  Therefore, the support member 41 is attached to the needle plate 7A so that the upper surface thereof is flush with the upper surface of the needle plate 7A. The width dimension of the needle plate 7A, that is, the dimension in the direction perpendicular to the extending direction of the cylinder bed 4 (left and right direction) is shorter than the width dimension of the cylinder bed 4, and the width dimension of the support member 41 is the width of the needle plate 7A. It is shorter than the dimensions.

  Here, the support leg 26A is configured in the same manner as the support leg 26 of the above-described embodiment, and is pivotally supported by the hinge mechanism 30A so as to be rotatable (posture changeable) to the front end portion of the support member 41. ing. The lower end portion of the support leg 26A is provided with a length adjustment mechanism 35A similar to the above-described embodiment, and when the height adjustment screw 36 is rotated clockwise or counterclockwise, the length dimension of the support leg 26A is obtained. That is, the height position of the front end portion of the support member 41 can be finely adjusted.

  Next, the operation of the support device 40 configured as described above will be described. The rear end portion of the support leg 26A intersects with the hanging cloth portion of the tubular sewing product 24 and is pulled downward to switch from the folded posture shown by the two-dot chain line in FIG. 8 to the supporting posture shown by the solid line. At this time, when the height of the front end portion of the support member 41 is lower or higher than the upper surface of the needle plate 7A, the height position can be finely adjusted by the length adjusting mechanism 35A.

  When embroidery sewing is started in this state, the embroidery frame 20 is moved in the left-right direction as described above, and when the embroidery frame 20 is moved in the front-rear direction, the rear frame portion 20a of the embroidery frame 20 is moved to the cylinder bed 4 or The front frame portion 20b of the embroidery frame 20 moves away from the support member 41 while sliding on the upper surface of the embroidery member held at a predetermined height by the support legs 26A. It moves smoothly while maintaining a horizontal state.

  In this way, a plate-like support member 41 attached near the front end of the cylinder bed 4 and extending forward in the extending direction of the cylinder bed 4 to support the front frame portion 20b of the embroidery frame 20, and the front end of the support member 41 And the support leg 26A in the horizontal direction, the width of the support member 41 is shorter than the width of the cylinder bed 4 in the direction perpendicular to the extension direction of the cylinder bed 4 in the horizontal direction. When moving while sliding the upper surface of the cylinder bed 4 and the upper surface of the support member 41, the front frame portion 20b of the embroidery frame 20 moves smoothly without lowering, so that the sewing pattern of the embroidery pattern (pattern shift) and the embroidery frame Collision between the front side frame portion 20b of the 20 and the cylinder bed 4 can be reliably prevented.

  Further, since the width of the support member 41 is shorter than the width of the cylinder bed 4, the frictional resistance when the embroidery frame 20 moves on the upper surface of the support member 41 becomes small, and the embroidery frame 20 itself or a cylinder held by the embroidery frame 20 It can move smoothly without being affected by the weight of the sewing product 24, and the positioning accuracy after the movement of the embroidery frame 20 can be significantly improved.

  In addition, since the support device 40 can have a simple structure in which only the support member 41 and the support legs 26A are provided, the number of parts is small, and the rigidity of the support member 41 is not particularly required. Is possible.

  The support member 41 is attached to the needle plate 7A so that the upper surface for supporting the front frame portion 20b of the embroidery frame 20 is substantially the same height as the upper surface of the needle plate 7A. In addition to simplifying the attaching operation to 7A, smooth movement of the embroidery frame 20 over the needle plate 7A upper surface and the support member 41 upper surface can be realized.

  Further, since the support member 41 has a width shorter than the width of the needle plate 7A in the orthogonal direction, the frictional resistance when the embroidery frame 20 moves on the upper surface of the support member 41 can be minimized, and the movement of the embroidery frame 20 Subsequent positioning accuracy can be significantly increased.

  6] In the above-described embodiment, the support member 41 is configured to be attached to the needle plate 7A. However, an attachment portion for attaching the support member 41 is provided at the front end portion of the cylinder bed 4, and the support member 41 is attached to the attachment portion. You may do it.

  7) The present invention is not limited to the embodiments and modifications described above, and those skilled in the art will implement various modifications to the above embodiments without departing from the spirit of the present invention. And the present invention includes those further modifications.

1 is a perspective view of a needle plate device for a sewing machine according to an embodiment of the present invention. 1 is a plan view of a needle plate device for a sewing machine according to an embodiment of the present invention. 1 is a side view of a needle plate device for a sewing machine according to an embodiment of the present invention. It is an enlarged side view of a needle plate device. It is a front view of a throat plate apparatus. It is an enlarged plan view of a needle plate device. It is the GG line vertical front view of FIG. It is an expansion side view of the support device concerning a change form. It is a front view of the support device concerning a change form. It is an enlarged plan view of a support device according to a modified embodiment.

Explanation of symbols

M Embroidery Sewing Machine 4 Cylinder Bed 7 Needle Plate 7a Needle Hole 7b Needle Plate 7c Needle Plate Extension 7A Needle Plate 13 Holder Drive Member 14 Connecting Member 20 Embroidery Frame 20b Front Frame 25 Needle Plate Device 26 Support Leg 26A Support Leg 30 Hinge mechanism 30A Hinge mechanism 35 Length adjustment mechanism 35A Length adjustment mechanism 40 Support device 41 Support member

Claims (7)

In a needle plate device of a sewing machine having an embroidery frame moving means and a cylinder bed capable of independently moving an embroidery frame holding a cloth to be embroidered in two orthogonal directions,
A needle plate portion provided on the upper surface portion of the cylinder bed and having a needle hole, and a horizontal extending from the front end of the needle plate portion forward in the length direction of the cylinder bed to support the front frame portion of the embroidery frame A needle plate body integrally formed with a needle plate extension,
A support leg for supporting the front end of the needle plate extension;
A sewing machine needle plate apparatus comprising:   The support leg is connected to a front end portion of the throat plate extension by a hinge mechanism, and is configured to be switchable between a vertically supported posture and a folded posture folded toward the throat plate extension. The throat plate device for a sewing machine according to claim 1.   The sewing machine throat plate apparatus according to claim 1 or 2, wherein the support leg has a length adjusting mechanism for adjusting the length thereof.   The sewing machine according to any one of claims 1 to 3, wherein the needle plate extension is set to a length that projects forward by a predetermined dimension from the foremost end position of the movement range of the embroidery frame. Needle plate device. Embroidery frame moving means capable of independently moving the embroidery frame holding the cloth to be embroidered in two orthogonal directions, a cylinder bed, and a needle plate disposed on the upper surface of the front end in the extending direction of the cylinder bed and having a needle hole In an embroidery frame support device used for a sewing machine equipped with
A plate-like support member attached in the vicinity of the front end of the cylinder bed and extending forward in the extending direction of the cylinder bed to support the front frame portion of the embroidery frame;
A support leg for supporting the front end of the support member;
An embroidery frame support device, wherein a width of the support member is shorter than a width of the cylinder bed in a horizontal direction perpendicular to an extending direction of the cylinder bed.   The said support member is attached to the said needle plate so that the upper surface for supporting the front frame part of the said embroidery frame may become substantially the same height as the upper surface of the said needle plate. Support device for embroidery frame. The embroidery frame support device according to claim 5 or 6, wherein the support member has a width shorter than a width of the needle plate in the orthogonal direction.