JP2007327166A - Sewing frame of sewing machine and sewing frame-driving mechanism - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prevent hanging-down of a front end of a sewing frame to the lower direction, in a sewing frame for spreading/holding a material to be sewn and a sewing frame-driving mechanism mediating driving of the sewing frame to longitudinal and lateral directions by a driving apparatus. <P>SOLUTION: In the sewing frame-driving mechanism 10, supporting mechanisms 12 and 27 for supporting longitudinal both ends of the sewing frame 8 so as to be movable in the lateral direction are provided in longitudinal frame sides 11b and 11a of a rectangular support frame 11 which is movable in the longitudinal direction, but not movable in the lateral direction. In the sewing frame-driving mechanism 10, a front hanging preventive mechanism 32 for preventing that the front frame side 11b of the support frame 11 hangs down to the lower direction to the rear frame side 11a is provided, and the front hanging preventive mechanism 32 is formed of left and right protruding portions 33 positioned in the left and right of recess portions 6h of a table 6 and left and right frame side portions 11c and 11d of the support frame 11 disposed so as to be movable in the longitudinal direction on the left and right protruding portions 33. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a sewing frame that stretches and holds a workpiece, and a sewing frame drive mechanism that mediates driving the sewing frame from front to back and from side to side and from side to side.

Among this kind of sewing frame driving mechanism, like a conventional sewing frame driving mechanism 90 shown in FIG. 13, a bar frame-shaped support frame 91 that is displaced forward and backward but not laterally is sewn. There is one in which a rear end of a cylindrical frame-like sewing frame 88 for expanding and holding an object (not shown) is rotatably supported (Patent Document 1).
JP-A-2005-199091

  In the case of the above structure, there is no particular problem if the length L0 of the sewing frame 88 in the front-rear direction is sufficiently short as shown in FIG. 13, but there are cases where it is desired to increase the length L0 depending on the conditions of the item to be sewn. is there. However, in that case, since the rear end of the sewing frame 88 is only supported in a cantilevered manner, a problem occurs that the unsupported front end hangs downward, so that the length of the sewing frame 88 is increased. It was practically difficult to make the length L0 longer than a certain length.

  Then, it aims at making the front end of a sewing frame hard to hang down below.

  In order to achieve the above object, the sewing frame of the sewing machine of the present invention includes supported portions that are supported at the front and rear ends of the sewing frame so as to be displaceable left and right on the front and rear frame sides of the rectangular frame-shaped support frame. However, being able to be displaced to the left and right means that at least a part of the sewing frame can be displaced to the left and right, more specifically, when a flat frame-shaped sewing frame can be moved in parallel to the left and right, The case where the upper part of the cylindrical frame-like sewing frame that stretches and holds the workpiece to be sewn on the upper part can be displaced to the left and right as the frame rotates is exemplified. The same applies to the following.

  Further, the sewing frame drive mechanism of the sewing machine of the present invention has both front and rear ends of the sewing frame that stretches and holds the workpiece on the front and rear frame sides of the rectangular frame-shaped support frame that is displaced forward and backward but not laterally. Is supported so as to be displaceable to the left and right.

  Although the said sewing frame drive mechanism is not specifically limited, It is preferable to provide the front sag prevention mechanism which prevents that the front frame side part of the said support frame hangs down with respect to a rear frame side part. At this time, the forward sagging prevention mechanism is not particularly limited, but the left and right protrusions of the table located on the left and right sides of the recesses protrude relatively forward by the recesses being recessed backward from the front side of the table. And a left and right frame side portion of the support frame mounted on the left and right projecting portions so as to be displaceable back and forth. Furthermore, it is preferable that a sliding member for reducing sliding friction is interposed between the left and right protruding portions and the left and right frame side portions.

  Further, the sewing frame drive mechanism is not particularly limited, but preferably includes a guide mechanism that guides the displacement of the support frame in the front-rear direction so that the support frame cannot be displaced in the left-right direction and prevents the lateral movement. At this time, the guide mechanism is not particularly limited, and both left and right inner end surfaces of the recess, guide rollers attached to the left and right frame side portions of the support frame and in contact with the inner end surface so as to be able to roll. Preferably it consists of.

  The guide mechanism is not particularly limited, but preferably includes a position adjustment mechanism that adjusts the position of the guide roller left and right. At this time, the guide mechanism is not particularly limited, but the guide roller is attached to the front part of the protruding member whose base part is fixed to the support frame and whose front part protrudes into the frame of the support frame, and The adjusting means preferably includes a combination of a left and right elongated hole penetrating the base of the projecting member and a screw for fixing the elongated hole to the support frame.

  The sewing frame drive mechanism is preferably used when the length of the sewing frame in the front-rear direction is 30 cm or more, and more preferably when the length is 50 to 100 cm. This is because the longer the length, the greater the necessity of the drive mechanism, and the upper limit is because there is no practicality if it is too long.

  Moreover, although the said to-be-sewn material is not specifically limited, Various pants, such as jeans and jeans, can be illustrated.

  The present invention also provides a sewing frame for a sewing machine that is particularly suitable for processing a cylindrical sewing product. In this sewing frame, a cylindrical outer frame is inserted outside the sewing bed that extends in the front-rear direction, an inner frame is put on the inside of the outer frame, and the rectangular frame-shaped support frame is inserted into the front and rear ends of the inner frame. A supported portion is provided on the front and rear frame sides, and an opening having a size that allows an operator's hand to enter the inside of the inner frame is formed at the front end of the inner frame.

  According to invention of Claims 1-7, the front end of a sewing frame can be made hard to hang down by supporting the front-and-rear both ends of a sewing frame to the front-and-rear frame side part of a rectangular frame-shaped support frame.

  According to the invention described in claim 8, since the sewing frame is composed of the outer frame and the inner frame, and the opening is formed at the front end of the inner frame, in addition to the above effects, the operator can start from the opening. The bobbin of the sewing machine bed can be easily replaced by extending the length of the sewing machine bed.

  A sewing frame drive mechanism 10 for a sewing machine according to the present invention is a sewing frame that stretches and holds a workpiece on front and rear frame side portions 11b and 11a of a rectangular frame-shaped support frame 11 that is displaced forward and backward but not laterally. Supporting mechanisms 12 and 17 are provided for supporting both front and rear ends of 8 so as to be displaceable to the left and right.

  The sewing frame drive mechanism 10 includes a front sag prevention mechanism 32 that prevents the front frame side part 11b of the support frame 11 from drooping downward with respect to the rear frame side part 11a. The forward sagging prevention mechanism 32 includes a left and right projecting portion 33 of the table 6 positioned on the left and right of the recess 6h, which projects relatively forward by the recess 6h being recessed from the front side of the table 6 to the rear. The left and right frame side portions 11c and 11d of the support frame 11 are mounted on the left and right protruding portions 33 so as to be displaceable in the front-rear direction.

  Further, the sewing frame drive mechanism 10 includes a guide mechanism 42 that guides the displacement of the support frame 11 in the front-rear direction so that the support frame 11 cannot be displaced in the left-right direction and prevents the left-right movement. The guide mechanism 42 is attached to the pair of guide surfaces 43 formed on the left and right inner end surfaces of the recess 6 h and extending in the front-rear direction, and the left and right frame sides 11 c and 11 d of the support frame 11, and rolls on the guide surface 43. It comprises a guide roller 45 that is in contact with it. The guide mechanism 42 includes a position adjusting mechanism 46 that adjusts the position of the guide roller 45 to the left and right.

  A sewing frame 104 for a sewing machine according to the present invention includes a cylindrical outer frame 108 that is inserted outside the sewing bed 7 that extends back and forth, and an inner frame 109 that covers the sewing bed 7 inside the outer frame 108. Yes. At the rear end of the inner frame 109, an attachment member 109a as a supported portion supported by the rear frame side portion 11a of the rectangular frame-shaped support frame 11 is provided, and at the front end of the inner frame 109, the front of the support frame 11 is provided. A bracket 112 is provided as a supported portion supported by the frame side portion 11b. At the front end of the inner frame 109, an opening 113 having a size that allows the operator's hand to enter the inner frame 109 is formed.

  The multi-head sewing machine 5 shown in FIGS. 1 to 4 of the present embodiment includes a table 6 having a recess 6h recessed from the front side to the rear and a central portion on the left and right sides, and a plurality of side by side arranged above the recess 6h. Sewing heads (not shown), a bed 7 arranged in parallel at a needle drop point P of the sewing head, and a sewing frame for expanding and holding a workpiece (not shown) between the sewing head and the bed 7 8, a sewing frame drive mechanism 10 that supports the sewing frame 8 so as to be displaceable in the front-rear and left-right plane directions, a front-rear drive device 51 that drives the sewing frame 8 back and forth, and a sewing frame 8 that is covered by rotating the sewing frame 8. It includes a left and right drive device 52 that drives the upper part of the sewing frame 8 that stretches and holds the sewing product to the left and right. Each of these components is directly or indirectly attached to the sewing machine frame 5f that is the base of the multi-head sewing machine 5.

  Each bed 7 is provided so as to protrude from the sewing machine frame 5f behind or below the recess 6h into the recess 6h or below the bed 6h. The inner frame 9 to be inserted is extrapolated. The inner frame 9 is a cylindrical frame having both ends open, and the rear end is supported by a rear frame side portion 11a of the support frame 11 provided in the sewing frame drive mechanism 10 so as not to rotate. In addition, a slit hole 9h is provided in the upper part of the inner frame 9 so as to be elongated in the front-rear direction, and the needle drop point P on the bed 7 is always provided even when the inner frame 9 is displaced forward and backward by the hole. It is a mechanism to be exposed.

  The sewing frame 8 is a bottomed cylindrical frame provided with an end face 8e at the front end, and is inserted on the inner frame 9 so as to be slidable in the circumferential direction. A sewing window 8h for extending and holding a workpiece (not shown) between the sewing head (not shown) and the needle drop point P is provided through the upper portion of the sewing frame 8. Further, at the front end of the sewing frame 8, a shaft bar 8b as a supported portion for pivotally supported by the front frame side portion 11b of the support frame 11 projects forward from the center portion of the end surface 8e. In the rear end portion, an engaging portion 8a is provided as a supported portion to be rotatably supported by the rear frame side portion 11a. The length L1 in the front-rear direction when the sewing frame 8 is installed on the multi-head sewing machine 5 is 70 to 80 cm without including the shaft bar 8b.

  The sewing frame drive mechanism 10 has a rectangular frame-shaped support frame 11 that supports a plurality of sets of sewing frames 8 and inner frames 9 arranged in the frame, and a rear frame side portion 11a of the support frame 11 with the rear end of the sewing frame 8 A rear end support mechanism 12 that is rotatably connected and supported, a front end support mechanism 17 that rotatably supports and connects the front end of the sewing frame 8 to the front frame side portion 11b of the support frame 11, and the support frame 11 An engagement mechanism 22 that engages the rear frame side portion 11a with the bed 7 so as to be displaceable in the front-rear direction, and a front suspension that prevents the front frame side portion 11b of the support frame 11 from drooping downward with respect to the rear frame side portion 11a. It includes a prevention mechanism 32 and a guide mechanism 42 that guides the displacement of the support frame 11 in the front-rear direction so that the support frame 11 cannot be displaced in the left-right direction and prevents the lateral movement.

  The support frame 11 is supported so that the rear frame side portion 11a can be driven back and forth by the front / rear drive device 51. Therefore, the rear frame side portion 11a serves as a drive frame for driving the sewing frame 8 back and forth. Have a role. In addition, a left and right drive device 52 is installed on the rear frame side portion 11a. On the other hand, the front frame side portion 11 b and the left and right frame side portions 11 c and 11 d of the support frame 11 serve as front end support frames for supporting the front end of the sewing frame 8. In addition, the front frame side part 11b is connected to the front ends of the left and right frame side parts 11c and 11d in a replaceable manner via a connection part 11x.

  The rear end support mechanism 12 includes a vertical plate 13 that hangs downward from the rear frame side portion 11a, a circular drive ring 14 that supports the base end of the sewing frame 8, and the drive ring 14 that rotates from the outer peripheral side thereof. A plurality of support rollers 15 sandwiched in a possible manner are included. The vertical plate 13 includes a shaft hole (not shown) through which the bed 7 is inserted at the center, and supports the rear end of the inner frame 9 so as not to rotate. On the other hand, the front end support mechanism 17 includes a shaft bar 8b provided at the front end of the sewing frame 8, and a support portion 18 that protrudes downward from the front frame side portion 11b and rotatably supports the shaft bar 8b. ing.

  The engagement mechanism 22 includes an upper engagement portion 23 formed on the upper portion of the bed 7 and its periphery, and a lower engagement portion 26 formed on the lower portion of the bed 7 and its periphery. The upper engaging portion 23 includes an upper guide groove 24 that is elongated in the front and rear direction in the upper portion of the bed 7 and a guided member that is attached to the rear frame side portion 11a and engages with the upper guide groove 24 so as to be displaceable in the front and rear directions. 25. On the other hand, the lower engagement portion 26 is attached to the lower guide groove 27 that is elongated in the front and rear at the lower part of the bed 7 and the vertical plate 13 of the rear end support mechanism 12 and can be displaced back and forth in the lower guide groove 27. And a guided member 28 engaged with each other.

  The front sagging prevention mechanism 32 protrudes relatively forward due to the recess 6h being provided in the recess, and the left and right protrusions 33 of the table 6 positioned on the left and right of the recess 6h, and the recesses on the left and right protrusions 33 are provided. A felt 34 as a sliding member for reducing sliding friction, which is attached to the front and rear along the place 6h, and left and right frame sides 11c and 11d of the support frame 11 placed on the felt 34. It is configured.

  The guide mechanism 42 includes both guide surfaces 43 formed on the left and right end surfaces of the recess 6h extending in the front-rear direction, and a projecting member 44 having a base portion fixed to the support frame 11 and a tip portion protruding into the frame of the support frame 11. And a guide roller 45 supported by the tip of the projecting member 44 and in contact with the guide surface 43 so as to allow rolling. Therefore, the guide mechanism 42 is configured to prevent the support frame 11 from being distorted or displaced to the left or right by the guide rollers 45 coming into contact with the guide surfaces 43 facing each other.

  The protruding member 44 has a base portion 44 a attached to the upper surface of the support frame 11, and the intermediate portion between the base portion 44 a and the tip portion 44 b has a height level of the tip portion 44 b below the upper surface of the support frame 11. A bent portion 44c for adjusting to the height level is formed to bend downward from the base portion 44a side toward the front portion 44b side. The guide roller 45 is rotatably supported by a rotation shaft 45x that protrudes downward from the lower surface of the tip portion 44b of the protruding member 44. The number of guide rollers 45 and the number of projecting members 44 supporting the guide rollers 45 is one on each of the left and right sides in the first embodiment.

  The guide mechanism 42 includes a position adjusting mechanism 46 that adjusts the position of the guide roller 45 to the left and right. The position adjusting mechanism 46 includes a long hole 47 that extends through the base portion 44 a of the protruding member 44 and extends to the left and right. , And a screw 48 for fixing the elongated hole 47 to the left and right frame sides 11c and 11d.

  The front / rear drive device 51 is provided in a plurality of elongate in the front / rear direction above the rear frame side part 11a, and supports the rear frame side part 11a so that it can be driven from the front to the front / rear. Further, the left and right drive device 52 is provided to be elongated in the left and right directions on the rear frame side part 11a, and simultaneously drives all the sewing frames 8 to rotate.

  According to the first embodiment, by supporting the front and rear ends of the sewing frame 8 on the front and rear frame sides 11 b and 11 a of the support frame 11, the sewing frame 8 is less likely to be displaced vertically and horizontally with respect to the support frame 11. Can do. Further, by providing the front sag prevention mechanism 32, the support frame 11 supporting the sewing frame 8 can be made difficult to sag downward, and by providing the guide mechanism 42, the support frame 11 is hardly shifted to the left and right. Can do. Therefore, by making the sewing frame 8 difficult to shift up and down and left and right with respect to the support frame 11 in this way, and making the support frame 11 difficult to hang down and difficult to slide left and right, the sewing frame 8 is difficult to hang down. It can be made difficult to shift from side to side. Therefore, the quality of the sewing product can be improved accordingly.

  Further, the guide mechanism 42 guides the displacement of the support frame 11 along the inner surface of the recess 6h of the table 6, and does not require a dedicated rail or the like, so the structure is simplified and the cost is reduced. It also leads to. Further, since the sewing frame 8 is supported at two points, the sewing frame 8 can be made compact.

  The multi-head sewing machine shown in FIGS. 5 to 7 of the second embodiment is substantially the same as that of the first embodiment, but instead of the cylindrical sewing frame 8, the length L2 of the flat frame shape in the front-rear direction is 70 to 70. The point that the 80 cm sewing frame 68 is attached, and accordingly, the rear end support mechanism 72 and the front end support mechanism 77 for the flat frame are used instead of the rear end support mechanism 12 and the front end support mechanism 17 for the cylinder frame. Is different in that it is provided. At this time, the front end support mechanism 77 is replaced by operating the connecting portion 11x to remove the front frame side portion 11b and attaching a front frame side portion 71b provided with the front end support mechanism 77 instead.

  The rear end support mechanism 72 connects the rear end portion 68a of the sewing frame 68 as a supported portion to be supported by the rear frame side portion 11a so as to be displaceable to the left and right, and connects the rear end portion 68a to the left and right driving device 52. And a rear end support member 73 that is supported so as to be driven left and right.

  The front end support mechanism 77 includes a front end portion 68b of a sewing frame 68 as a supported portion to be supported by the front frame side portion 71b so as to be displaceable left and right, and a front end support protruding rearward from the front frame side portion 11b. And a front end support member 79 having a rear end portion attached to the front end portion 68b of the sewing frame 68 and slidably sandwiching the rear end portion of the front end support portion 78 from the top and bottom to the left and right. A felt 80 for reducing sliding friction is interposed between the rear end portion of the support portion 78 and the front end portion of the front end support member 79 sandwiching the support portion 78.

  According to the second embodiment, the flat frame can be supported instead of the cylindrical frame by simply replacing a part of the sewing frame driving mechanism 10 of the first embodiment.

  Note that the present invention is not limited to the above-described embodiments, and can be appropriately modified and embodied without departing from the spirit of the invention. For example, the number of the guide rollers 45 and the protruding members 44 that support the guide rollers 45 May be increased to three, four, etc., instead of two, one on each side. In the first embodiment, an end face 8e and a shaft rod 8b are provided at the front end of the sewing frame 8, and instead of rotatably supporting the shaft rod 8b, an end surface and a similar shaft rod are provided at the front end of the inner frame 9. The front end of the sewing frame 8 may be rotatably supported via the inner frame 9 by supporting the shaft rod so as not to rotate.

  Next, a third embodiment of the present invention will be described with reference to FIGS. The sewing frame 104 according to the third embodiment is different from the sewing frame 8 according to the first embodiment in that supported portions supported by the support frame 11 are provided at both front and rear ends of the inner frame 109. The sewing frame 104 includes a cylindrical outer frame 108 that is inserted outside the sewing machine bed 7 that extends long in the front-rear direction, and a cylindrical inner frame 109 that is inserted on the sewing machine bed 7 inside the outer frame 108. And the entire circumference of the sewing machine bed 7 is encapsulated by a double frame body (see FIG. 10). A hook 102 is built in the front end of the sewing machine bed 7, and a bobbin 103 wound with a lower thread is stored inside the hook 102.

  The outer frame 108 is formed in a long cylindrical shape whose both front and rear ends are open (see FIG. 8). A connecting portion 108 a connected to the drive ring 14 of the left and right drive device 52 is provided at the rear end of the outer frame 108. A ring 108 b supported by the roller 111 of the inner frame 109 is fixed to the inner periphery of the front end portion of the outer frame 108. In the upper half of the outer frame 108, there is a sewing window 108h for expanding a long cylindrical sewing product such as jeans or the like around the needle drop hole (needle drop point P: see FIG. 9) of the sewing machine bed 7. Wide enough to the left and right (circumferential direction) with sufficient length in the front and back.

  The inner frame 109 is formed in a cylindrical shape having substantially the same length as the outer frame 108. At the rear end of the inner frame 109, a cup-shaped attachment member 109 a that is a supported portion on the rear end side of the sewing frame 104 is provided, and is fixedly supported by the vertical plate 13 of the rear end support mechanism 12 with screws 110. (See FIG. 12). A terminal plate 109b is fixed to the front end of the inner frame 109 so as to face the ring 108b from the front (see FIG. 11). A slit hole 109h that exposes the needle drop point P of the bed 7 is formed in the upper part of the inner frame 109 so as to extend in the front-rear direction with substantially the same length as the sewing window 108h.

  A pair of left and right rollers 111 that engage with the inner peripheral edge of the ring 108b are provided on the upper portion of the terminal plate 109b, and the front end of the outer frame 108 is supported by the rollers 111 so as to be rotatable around the cylindrical axis of the inner frame 109. Yes. A bracket 112, which is a supported portion on the front end side of the sewing frame 104, is attached to the end plate 109b between the pair of rollers 111 so as to protrude forward in parallel with the cylindrical axis of the inner frame 109. An opening 113 is formed in the terminal plate 109b below the bracket 112 so that the operator's hand can enter the inside of the inner frame 109.

  The base end of the bracket 112 is attached to the terminal plate 109b with a bolt 114 (see FIG. 12), and the front end is supported by the front frame side portion 11b of the support frame 11 by a support tool 116. The front frame side portion 11 b includes a nut 117 at the attachment position of the sewing frame 104, and the support 116 is attached to the front frame side portion 11 b by a bolt 118 with a handle that is screwed onto the nut 117. At the upper end of the support 116, a U-groove 120 that fits the positioning protrusion 119 of the front frame side part 11 b is formed, and ribs 121 are formed on both front and rear surfaces of the support 116.

  A support piece 122 protrudes rearward from the lower end of the support tool 116, and a plate spring 123 is attached to the upper surface of the support piece 122 to press the tip end of the bracket 112 against the support piece 122. A through-hole 124 having substantially the same width as the leaf spring 123 is formed at the tip of the bracket 112, and the bracket 112 is supported at a fixed position in the left-right direction by fitting the through-hole 124 and the bent portion 123a of the leaf spring 123. 116. A plurality of pieces of cushioning material 125 are bonded to the end plate 109b of the inner frame 109 on the surface of the outer frame 108 facing the ring 108b.

  According to the sewing frame 104 of the third embodiment, the front and rear ends of the inner frame 109 are both supported by the support frame 11, so that the front frame of the sewing frame 104 can be reliably prevented as in the first embodiment. Further, the inner frame 109 covers the sewing window 108h of the outer frame 108 from the inside, and the workpiece is supported by a cylindrical surface that is in close proximity to the cylindrical surface of the outer frame 108. A large embroidery pattern can be processed with high accuracy over a wide area of the long sewn product. In particular, since the opening 113 is formed at the front end of the inner frame 109, when replacing the bobbin, the operator extends his / her hand from the opening 113 into the inner frame 109 with the sewing frame 104 retracted (see FIG. 11), there is an advantage that the bobbin 103 can be easily detached from the hook 102 in the sewing machine bed 7.

1 is a plan view showing a multi-head sewing machine of Example 1. FIG. It is a perspective view which shows the sewing frame of the Example. It is side surface sectional drawing which shows the sewing frame of the Example, and the mode of the periphery. (A) which shows the guide mechanism of the Example is a top view, (b) is a front view. 6 is a plan view showing a multi-head sewing machine of Example 2. FIG. It is a perspective view which shows the sewing frame of the Example. It is side surface sectional drawing which shows the sewing frame of the Example, and the mode of the periphery. FIG. 6 is a perspective view showing a sewing frame of Example 3. It is a top view which shows the front-end part of the sewing frame of the Example. It is sectional drawing which looked at the sewing frame of the Example from the XX line of FIG. It is sectional drawing which shows the front end support structure of the sewing frame of the Example. It is sectional drawing which shows the rear-end support structure of the sewing frame of the Example. It is a top view which shows the sewing frame drive mechanism of a prior art example.

Explanation of symbols

6 Table 6h Recess 7 Sewing machine bed 8 Sewing frame 8a Engagement part as supported part 8b Shaft bar as supported part 10 Sewing frame drive mechanism 11 Support frame 11a Rear frame side part 11b Front frame side part 11c Left frame side Part 11d Right frame side part 12 Support mechanism (rear end support mechanism)
17 Support mechanism (front end support mechanism)
32 Front sag prevention mechanism 33 Left and right protruding parts of table 42 Guide mechanism 43 Guide surface (inner end surface)
45 Guide roller 46 Position adjustment mechanism 68 Sewing frame 68a Supported part (rear end part)
68b Supported part (front end)
71b Front frame side portion 72 Support mechanism (rear end support mechanism)
77 Support mechanism (front end support mechanism)
103 Bobbin 104 Sewing frame 108 Outer frame 109 Inner frame 109a Mounting member 112 as a supported portion Bracket 113 as a supported portion Opening portion

Claims (8)

  A sewing frame for a sewing machine having a supported portion supported at both front and rear ends so as to be displaceable to the left and right by the front and rear frame sides of a rectangular frame-shaped support frame.   A support mechanism that supports the front and rear ends of the sewing frame that stretches and holds the workpiece to be displaceable to the left and right is provided on the front and rear frame sides of the rectangular frame-shaped support frame that is displaced forward and backward but not laterally. Sewing frame drive mechanism of the sewing machine.   The sewing frame drive mechanism for a sewing machine according to claim 2, further comprising a front sag prevention mechanism that prevents the front frame side of the support frame from drooping downward with respect to the rear frame side.   The front sagging prevention mechanism includes a left and right projecting portion of the table located on the left and right sides of the recess, which protrudes relatively forward by a recess formed from the front side of the table to the rear. 4. A sewing frame drive mechanism for a sewing machine according to claim 3, further comprising left and right frame side portions of the support frame mounted on the support frame so as to be displaceable back and forth.   The sewing frame drive mechanism for a sewing machine according to any one of claims 2 to 4, further comprising a guide mechanism that guides the displacement of the support frame in the front-and-rear direction so as not to be displaced in the left-right direction to prevent lateral shaking.   6. The sewing machine according to claim 5, wherein the guide mechanism includes left and right inner end surfaces of the recess, and guide rollers attached to the left and right frame side portions of the support frame so as to be able to roll on the inner end surface. Sewing frame drive mechanism.   The sewing frame drive mechanism for a sewing machine according to claim 6, wherein the guide mechanism includes a position adjusting mechanism that adjusts the position of the guide roller to the left and right.   Insert a cylindrical outer frame on the outside of the sewing bed that extends in the front and rear, insert a cylindrical inner frame on the sewing bed inside the outer frame, and insert a rectangular frame-shaped support frame on the front and rear ends of the inner frame. A sewing frame for a sewing machine in which a supported portion supported by the front and rear frame sides is provided, and an opening having a size that allows an operator's hand to enter the inside of the inner frame is formed at the front end of the inner frame.

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