JP2008245776A - Frame structure of sewing machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a frame structure of a sewing machine, enabling the machine to be equipped with a functional module on an appropriate place of a machine frame, not requiring highly machining precision, rendering machine sizes easily changeable and manufactured lightly, rigidly with less costs. <P>SOLUTION: The frame structure 1 of the sewing machine comprising a bed 1a, an arm 1b and a support leg part 1c is formed by a method wherein long in first and second directions and rigid frame boards 11 and 12 consisting of ribs and vertically short and lower rigid frame boards 13 and 14, being apart from one another in parallel in a sewing direction respectively, are connected by first and second rigid frame cross members 15 and 16 and third and fourth rigid frame cross members 17 and 18, consisting of main members in the front and in the rear in the sewing direction. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a frame structure of a sewing machine, and more particularly, to a frame structure of a sewing machine that is light and robust and manufactured at low cost.

  2. Description of the Related Art Conventionally, a sewing machine frame is formed of a cast iron or aluminum product to ensure high rigidity, and is machined to mount a stitch forming device including various mechanisms of the sewing machine. Therefore, in this case, since the body is made of a cast product, the machine body is heavy, and the cost is high from the viewpoint of mold cost and machining cost for producing the cast product.

  In order to solve these problems, there is known a sewing machine frame structure (for example, see Patent Document 1) in which a plastic molded body and a reinforcing portion are combined without using a casting that requires machining.

  In addition, a sewing machine frame structure (see, for example, Patent Document 2) created by assembling frame components is known.

Japanese Patent Laid-Open No. 1-313088 JP-A-11-290573

  However, in the sewing machine frame structure disclosed in Patent Document 1, since the functional module of the sewing machine cannot be mounted in the plastic molded body in which the reinforcing portion is combined, there is a problem that it cannot be used as a sewing machine frame that performs such a function. is there.

  In addition, in the sewing machine frame structure disclosed in Patent Document 2, each frame component requires high machining accuracy in order to assemble many frame components, and when changing the size of the sewing machine, one frame configuration is required. When changing the dimensions of a part, there is a difficulty in that the dimensions of the corresponding frame components must also be changed.

  The present invention has been made to solve the above-described conventional problems, and the functional module of the sewing machine can be mounted at an appropriate position of the sewing machine frame, so that high machining accuracy is not required, and the dimensions of the sewing machine can be easily changed. It is an object of the present invention to provide a sewing machine frame structure that is lighter, more robust, and less expensive.

  The frame structure of the sewing machine of the present invention that achieves the above-described object is to hold the workpiece to be pressed on the throat plate by the presser module, and to feed it step by step in the stitching direction in the sewing direction by the feed module. The seam is formed with the thread on the sewing object by the stitch forming device including the rotary hook device that cooperates with the needle catcher with the thread catching heel side by linearly reciprocating up and down by the needle and lid needle drive module. Applies to the sewing machine to perform.

  The frame structure of the sewing machine according to the first aspect of the present invention includes a first rigid frame plate elongated in the vertical direction and arranged in parallel with the sewing direction of the sewing machine and arranged in a lateral direction. The vertical rigid frame plate that is long in the vertical direction and the vertical direction of the first and second vertical rigid frame plates that are long in the sewing direction of the sewing machine and laterally spaced apart on the left side A short lower rigid frame plate, and an upper portion of the first rigid frame plate that is long in the first and second vertical directions when viewed in the sewing direction of the sewing machine. Upper and lower rigid frame plates are connected to the lower and lower rigid frame plates in the first and second vertical directions and the lower and lower rigid frame plates in the sewing direction of the sewing machine, respectively. The lower shaft for driving the seam forming device by the first and second rigid frame cross members is a lower portion of the first and second vertical rigid frame plates and a lower vertical rigid frame. Forming a bed supported by a plate and passing through, the upper portion of the first and second vertically elongated rigid frame plates and the vertically elongated upper rigid frame plate in front of the sewing direction of the sewing machine; A rigid frame in which the upper shaft for driving the eyelet / lid needle drive module, the presser module and the feed module is elongated in the first and second vertical directions by the third and fourth rigid frame transversal members respectively connected at the rear. The upper arm of the plate and the upper rigid frame plate that is short in the vertical direction form an arm that is passed through, and the bed and the arm are connected to form a support pedestal that supports the arm. It is intended to.

  According to the frame structure of the sewing machine according to the first aspect, the first rigid frame plate elongated in the first vertical direction and the second rigid frame plate elongated in the second vertical direction are separated from each other. A bed is formed by separating the lower rigid frame plate vertically long and the lower rigid frame plate vertically short and connecting with the first and second rigid frame transverse members, The arm is formed by separating the upper portion of the second rigid frame plate that is elongated in the vertical direction and the upper rigid frame plate that is elongated in the vertical direction and connecting them with the third and fourth rigid frame transverse members, Since the bed and the arm are connected to form a supporting pedestal portion that supports the arm, each functional element can be modularized and mounted at an appropriate position on the frame. In addition, since a single frame is formed by assembling the rigid frame plate and the rigid frame crossing member, modules and the like can be mounted on the rigid frame plate itself. It is possible to easily modify the dimensions of Furthermore, each rigid frame plate is separated and each rigid frame plate is connected by each rigid frame cross member to form the bed, arm, and supporting footnote, so when changing the dimensions of the sewing machine It is only necessary to change the dimensions of the frame components of the part, and it is possible to reduce the weight and toughness and to manufacture at a low cost. In the present specification, a module means a set of parts as a functional unit.

  The frame structure of the sewing machine according to the second aspect of the present invention includes a first rigid frame plate elongated in the vertical direction and arranged in a lateral direction spaced apart and parallel to the sewing direction of the sewing machine. 2 rigid frame plates that are elongated in the vertical direction, and the vertical positions of the first frame and the second rigid frame plate that are elongated in the sewing direction of the sewing machine. The lower rigid frame plate that is short in the direction, the upper portion of the rigid frame plate that is long in the first and second vertical directions when viewed in the sewing direction of the sewing machine, and the short length in the vertical direction that is spaced apart on the left side and arranged laterally The upper and lower rigid frame plates are connected to the lower portion of the first and second vertically elongated rigid frame plates and the lower portion of the vertically rigid lower rigid frame plate at the front and rear in the sewing direction of the sewing machine, respectively. The lower shaft for driving the stitch forming device by the first and second rigid frame crossing members is a lower portion of the first and second vertically elongated rigid frame plate and a vertically elongated lower rigid frame. Forming a bed supported by a plate and passing through, the upper portion of the first and second vertically elongated rigid frame plates and the vertically elongated upper rigid frame plate in front of the sewing direction of the sewing machine; A rigid frame in which the upper shaft for driving the eyelet / lid needle drive module, the presser module and the feed module is elongated in the first and second vertical directions by the third and fourth rigid frame transversal members respectively connected at the rear. An upper arm of the plate and an arm supported by a vertically short upper rigid frame plate are formed, and a supporting pedestal for supporting the arm by connecting the bed and the arm is formed. The presser module and the hook needle / lid needle drive module connected to the upper shaft are mounted on the upper rigid frame plate that is short in the vertical direction at the distal end of the arm, and is connected to the feed module and the lower shaft. The apparatus is mounted on a lower rigid frame plate that is vertically short at the lateral tip of the bed.

  According to the sewing machine frame structure according to the second aspect, the sewing machine has the function and effect of the sewing machine frame structure according to the first aspect, and further, the presser module and the heel / lid needle driving module are mounted on the side of the arm. Attaching the feed module and stitch forming device to the vertically short lower rigid frame plate located at the lateral tip of the bed Therefore, the presser module, the heel needle / lid needle drive module, the feed module, and the stitch forming device can be mounted at appropriate positions on the frame so that they can operate according to their respective functions.

  According to a third aspect of the present invention, in the frame structure of the sewing machine according to the second aspect, the stitch forming device is a first, which is arranged in front of the sewing direction of the sewing machine protruding from the lower rigid frame plate that is short in the vertical direction. Mounted on the sub-plate fixed to the lateral end of the second rigid frame cross member, the rotary hook device is driven to tension the yarn around the hook needle, and the yarn pulled out of the rotary hook device is threaded. It has a thread drawing operation element to be tightened.

  According to the frame structure of the sewing machine as the second aspect, it is possible to attach the yarn pulling operation element to an appropriate position of the frame so as to engage the yarn supplied from the rotary hook device.

  According to a fourth aspect of the present invention, in the frame structure of the sewing machine according to the first aspect to the third aspect, the lower portion of the rigid frame plate elongated in the second vertical direction and the lower rigid frame plate elongated in the vertical direction. A second lower rigid frame plate in the second vertical direction of reinforcement is disposed on the upper portion of the second rigid frame plate elongated in the second vertical direction and a second lower rigid frame plate in the vertical direction. A short upper rigid frame plate is arranged in the vertical direction.

  According to the sewing machine frame structure according to the fourth aspect, the size of the sewing machine can be modified and the rigidity of the frame can be enhanced.

  According to a fifth aspect of the present invention, in the frame structure of the sewing machine according to the first to third aspects, the first and second rigid frame cross members connected respectively at the front and rear in the sewing direction of the sewing machine. Reinforcing first and second rigid frame transverse members are arranged.

According to the frame structure of the sewing machine as the fifth aspect, the rigidity of the frame can be enhanced.

  According to a sixth aspect of the present invention, in the frame structure of the sewing machine according to the first to third aspects, the needle plate is attached to a lower rigid frame plate that is short in the vertical direction at the upper part of the stitch forming device. It is.

  According to the frame structure of the sewing machine according to the sixth aspect as described above, the needle plate can be mounted at an appropriate position on the frame where the presser module and the eyelet / lid needle drive module perform the sewing operation.

  According to a seventh aspect of the present invention, in the frame structure of the sewing machine according to the third aspect, the thread captured by the thread catching scissors is moved between the needle tip of the scissors needle and the sewing product when the needles descend from the top dead center. A yarn gathering mechanism for yarn gathering is attached to an upper rigid frame plate that is short in the vertical direction at the distal end in the lateral direction of the arm.

  According to the frame structure of the sewing machine as the seventh aspect, the yarn shifting mechanism can be attached to a frame position suitable for yarn shifting.

  According to an eighth aspect of the present invention, in the frame structure of the sewing machine according to the third aspect, before the heel needle descends from the top dead center and penetrates the workpiece, and rises from the bottom dead center and comes out of the workpiece. The rotation / linear feed switching mechanism for releasing the press-holding of the sewing product on the throat plate and manually rotating the sewing product in the feed direction with the heel needle as the rotation axis is provided on the side of the arm. It is mounted on the upper part of the rigid frame plate elongated in the second vertical direction at the rear end in the direction.

  According to the frame structure of the sewing machine according to the eighth aspect as described above, the rotation operation / linear feed switching mechanism can be mounted at an appropriate position of the frame that can be interlocked with the presser module.

  According to a ninth aspect of the present invention, in the frame structure of the sewing machine according to the third aspect, the upper part of the rigid frame plate elongated in the first vertical direction and the long rigidity in the second vertical direction in the support leg column portion. On the upper part of the frame plate, the needle movement is transmitted to the needle / lid needle drive module with the upper shaft for needle drop control, and the drive motion is transmitted to the feed module with the upper shaft for cloth feed control of the sewing product. The module is installed.

  According to the frame structure of the sewing machine according to the ninth aspect as described above, the transmission module for driving and driving the eyelet / lid needle driving module and the feeding module can be mounted at an appropriate position of the frame.

  According to a tenth aspect of the present invention, in the frame structure of the sewing machine according to the ninth aspect, the lower portion of the rigid frame plate elongated in the first vertical direction and the long rigidity in the second vertical direction in the supporting leg column portion. A drive module that drives the stitch forming device in conjunction with the transmission module is mounted between the lower portion of the frame plate.

  According to the frame structure of the sewing machine according to the tenth aspect, the drive module can be mounted at an appropriate position on the frame that can drive the stitch forming device in conjunction with the transmission module.

  According to an eleventh aspect of the present invention, in the frame structure of the sewing machine according to the tenth aspect, a rigid frame plate elongated in the first vertical direction and a rigid frame elongated in the second vertical direction are arranged in the drive module. The first stroke of the heel needle is formed as a jump stitch set with hand stitch stitches on the surface of the sewing product and lock stitches on the back surface with the cooperation of the heel needle, rotary hook device and thread pull-out actuator. When the workpiece is fed by the feed module at the stitch pitch for hand stitch stitches, and the workpiece is fed by the feed module at the second stroke of the needle stitch pitch between the stitch stitches. , The feed pitch setting mechanism for setting the stitch pitch feed amount for stitch pitch feed and the pitch feed amount between stitches for pitch feed between stitches, and sewing for each jump stitch set Pitch feed, in which the sequential switching feed mode changeover mechanism in the workpiece feed mode respectively corresponding to the inter-stitch pitch feed is attached.

  According to the frame structure of the sewing machine according to the eleventh aspect, the feed amount setting mechanism and the feed mode switching mechanism are arranged in the drive module, and the hook / lid needle drive module, the rotary hook device, It can be installed at the right place on the frame that can be linked.

  According to the frame structure of the sewing machine of the present invention, the functional module of the sewing machine can be mounted at an appropriate position of the sewing machine frame.

  In addition, according to the frame structure of the sewing machine of the present invention, high machining accuracy is not required, and the dimensions of the sewing machine can be easily changed.

  Further, according to the frame structure of the sewing machine of the present invention, it is possible to reduce the weight and make it robust and to manufacture it at low cost.

  DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, the best mode for carrying out the invention will be described with reference to the drawings.

  As shown in FIGS. 1 and 2, the sewing machine to which the frame structure of the present invention is applied holds the workpiece Fa on the throat plate 2 by the presser module 21 and the first stitch pitch in the sewing direction by the feed module 31. The workpiece is fed by the stitch forming device 41 including the rotary hook device 42 that moves forward and step by step and linearly reciprocates up and down by the heel / lid needle drive module 22 through the workpiece Fa. The stitches are formed on the fa with thread, and each module and the like are assembled in functional units and then mounted on the sewing machine frame 1. The sewing machine frame 1 connects the bed 1a to which the feed module 31 and the stitch forming device 41 are mounted, the arm 1b to which the eyelid / lid needle driving module 22 and the presser module 21 are mounted, and the bed 1a and the arm 1b. And a supporting leg 1c that supports the arm 1b. As shown in FIGS. 3A and 3B, the hook needle 221 is provided with a thread catching bar 221a and linearly reciprocates in the vertical direction to catch the sewing thread from the rotary hook device 42 with the thread catching bar 221a. Then, the sewn thread is pierced through the sewing object Fa.

  The heel / lid needle drive module 22, the presser module 21 and the feed module 31 are each driven by the upper shaft 3, and the stitch forming device 41 is driven by the lower shaft 4. The upper shaft 3 is driven by a transmission mechanism which will be described later, for example, a transmission module 51 as shown in FIGS. 1, 2 and 10 which will be described later, and the lower shaft 4 is a driving mechanism which is driven in conjunction with the transmission mechanism, for example, a diagram which will be described later. 1. Driven by a drive module 52 as shown in FIGS.

  This sewing machine is suitable for a pseudo hand stitch called a pinpoint / saddle stitch. This pseudo hand stitch is formed by a pseudo pinpoint stitch similar to the seam of ISO 4915 Stitch Type 104, which is an international standard, and more specifically, as shown in FIG. This is a single-thread locked hand stitch in which double-layered sewing threads are formed in a hand stitch shape, and a seam stitch is formed on the lower side of the sewing object Fa.

Next, each module and the like will be described in detail with reference to FIGS. 5 and 8 together with FIGS.
The heel / lid needle drive module 22 moves the heel needle 221 down from the top dead center, penetrates the workpiece Fa placed on the throat plate 2, and then comes out of the workpiece Fa from the bottom dead center and ascends. In the first stroke that reciprocates linearly in the vertical direction, the sewing thread is captured by the thread catching rod 221a when descending from the top dead center, penetrating the workpiece Fa, and ascending from the bottom dead center, and in the second stroke This is a mechanism configuration that can release the sewing thread that has been captured by the thread catching bar 221a when descending from the dead point, penetrating the workpiece Fa, and ascending from the bottom dead point. In this specification, “the first stroke of the needle 221” refers to the first needle until the needle 221 reaches the needle top dead center → the needle bottom dead center → the needle top dead center, “the second stroke of the needle 221”. Means the second needle from the top dead center to the bottom dead center to the top dead center.

  As shown in FIG. 5, the needle / lid needle driving module 22 can be mounted on the sewing machine frame 1 by the needle / lid needle driving module mounting base 23. Further, as shown in FIGS. 6A and 6B, the needle / lid needle drive module 22 has the needle 221 fixed to the needle holder 222, and the needle holder 222 is capable of linear reciprocation in the vertical direction. The needle bar 223 incorporated in the lid needle drive module mounting base 23 is fixed to the lower end of the needle bar 223 with a needle set screw 224. Further, the thread catching bar 221 a of the barb needle 221 is opened and closed by the lid needle 225. The lid needle 225 is fixed to the lid needle holder 226 with a lid needle set screw 227, and the lid needle holder 227 is a lid needle bar incorporated in the needle / lid needle drive module mounting base 23 so as to be capable of linear reciprocation in the vertical direction. It is fixed to the lower end of 228. Further, the eyelid / lid needle drive module 22 includes a mechanism for converting the rotational motion of the upper shaft 3 into crank motion and reciprocating the needle bar 223 in the vertical direction. The rotational movement of the upper shaft 3 is transmitted to the eyelid / lid needle driving module 22 through a transmission mechanism.

  The needle / lid needle drive module 22 configured in this way is a mechanism that can raise the lid needle 225 as the needle bar 221 rises when the needle bar 223 rises due to the rotation of the upper shaft 3. A) As shown in FIG. 6A, the thread catching rod 221a of the rod needle 221 is closed by the lid needle 225. That is, the thread catching rod 221a is closed by the lid needle 225 when the rod needle 221 moves from the bottom dead center to the top dead center. Further, when the needle bar 223 is lowered by the rotation of the upper shaft 3, the mechanism can stop the lid needle 225 at a fixed position even if the needle 221 is lowered. ), The thread catching bar 221a of the barb 221 is opened. In other words, the thread catching bar 221a is released from the lid needle 225 below the needle plate 2 after the barbed needle 221 has penetrated the workpiece.

  As shown in FIG. 1, the presser module 21 is a mechanism for operating a presser foot 211 for pressing the workpiece Fa against the throat plate 2 by the pressing force of a presser pressure adjusting spring (not shown). A presser lift lever 212 for moving up and down is provided. The presser foot lifting lever 212 is raised to create a space between the presser foot 211 and the throat plate 2, the workpiece Fa is placed on the throat plate 2, and the presser foot lifting lever 212 is lowered to press the sewed material Fa onto the presser foot 211. By pressing against the needle plate 2, the sewing object Fa can be set on the needle plate 2. In this embodiment, the presser module 21 is incorporated in the eyelid / lid needle driving module mounting base 23 of the eyelet / lid needle driving module 22.

  As shown in FIG. 7, the feed module 31 can be attached to the sewing machine frame 1 by a feed module mounting plate 311, for example. The feed module 31 is a mechanism for moving the feed dog 312 in an elliptical manner to feed the workpiece set on the needle plate 2. The feed dog 312 is moved back and forth in the horizontal direction by the reciprocating rotation of the horizontal feed shaft 313. The feed dog 312 can be reciprocated in the vertical direction by the reciprocating rotation of the feed shaft 314. Therefore, the feed module 31 can cause the feed dog 312 to move in a so-called four-step motion of ascending, advancing, descending, and retreating.

  As shown in FIG. 8, the stitch forming device 41 includes a thread pulling-out actuator driving mechanism 43 together with the rotary hook device 42. The rotary hook device 42 is provided with a half rotary hook 421 below the needle plate 2 from which the sewing thread is drawn out. When the rotary hook device 42 descends from the top dead center in the first stroke, penetrates the workpiece, and rises from the bottom dead center, The sewing thread is tightened by reversing the rotation halfway and further reversing as the needle 221 that has captured the sewing thread by the thread catching bar 221a is tightened, and the barb needle 221 descends from the top dead center in the second stroke to become the workpiece. When the needle passes through and rises from the bottom dead center, the hook has a sword that the hook catches the sewing thread that has been caught by the thread catching rod 211a in a half-rotation forward rotation. Then, the thread can be released from the thread catching bar 211a, and the released sewing thread can be passed through the hook by the rotation of the hook further to be combined with the sewing thread wound around the hook.

  The half-rotating hook 421 is provided with a bobbin case 422 that houses a bobbin wrapped with a sewing thread and engages with the outer hook and does not rotate. Can be attached to the sewing machine frame 1. The lower shaft 4 can be reversely rotated halfway and forwardly rotated halfway through the drive mechanism.

  As shown in FIG. 8, the thread pull-out actuator driving mechanism 4S reciprocates the thread pull-out actuator 431 like a balance to loosen the sewing thread or tighten the seam. When the half catch hook 221a of the saddle needle 221 catches the sewing thread, the half rotary hook 421 rotates, so that the sewing thread pulled out from the half rotary hook 421 is in tension with the round needle 221 and tensioned from the half rotary hook 421. This is a mechanism configuration that can tighten the thread that has passed through. In the present specification, “circumferential contact” means contact with a certain part. This thread pull-out operator 431 hooks the sewing thread pulled out from the half-rotating hook 421 after the sewing thread caught by the thread catching bar 221a is scooped by the tip of the half-rotating hook 421, and pulls it out from the half-rotating hook 421. After the thread is tightened and the sewing thread is captured by the thread catching bar 221a, it has a function of releasing the hooked thread.

  Further, the yarn drawing drive mechanism 43 is rotatably provided with a cam follower 433 that engages with a cam groove (not shown) of a yarn drawing actuator driving cam 432 that is rotated by a drive mechanism that is driven in conjunction with the transmission mechanism. The thread withdrawal actuator drive rod base 434 has one end fixed to the thread withdrawal actuator drive rod base 434 and the other end rotatable to the arm end 435a of the thread withdrawal actuator drive arm 435 by a step pin (not shown). A thread extraction actuator driving rod 436 fixed to the thread extraction actuator, and a thread extraction actuator swinging shaft 437 arranged in the vertical direction and having one end fixed to the thread extraction actuator driving arm 435 and the other end fixed to the thread extraction actuator 431. And. The thread drawing operation element 431 can be attached to the sewing machine frame 1 by a thread drawing operation element swinging shaft 437.

  When the yarn withdrawal actuator drive cam 432 of the yarn withdrawal drive mechanism 43 is rotated by the drive mechanism, the cam follower 433 of the yarn withdrawal operator drive rod base 434 is pulled out according to the shape of the cam groove of the yarn withdrawal actuator drive cam 432. The thread drawing operation element 431 is swung through the operation element driving rod 436. Therefore, as described above, the thread can be slackened or the seam can be tightened.

  The structure of the sewing machine frame 1 on which the presser module 21, the feed module 31, the heel needle / lid needle driving module 22 and the stitch forming device 41 are respectively mounted is parallel to the sewing direction SL of the sewing machine as shown in FIG. A first vertically elongated rigid frame plate 11 and a second vertically elongated rigid frame plate 12 that are oriented and spaced apart and disposed in the transverse direction LD, as viewed in the sewing direction SL of the sewing machine First and second vertically elongated rigid frame plates 11 and 121, lower portions 111 and 121, a vertically elongated lower rigid frame plate 13 spaced apart on the left side and disposed in a lateral direction LD, and a sewing machine Vertically arranged in the lateral direction LD spaced apart from the upper portions 112 and 122 of the rigid frame plates 11 and 12 elongated in the first and second vertical directions when viewed in the sewing direction SL. And a short upper rigid frame plate 14 to the direction.

  Further, the sewing machine frame 1 includes a lower portion 111, 121 of the first and second rigid frame plates 11, 12 which are elongated in the vertical direction and a lower rigid frame plate 13 which is elongated in the vertical direction in front of the sewing direction SL of the sewing machine, The lower shaft 4 for driving the stitch forming device 41 by the first and second rigid frame cross members 15 and 16 connected respectively at the rear is a rigid frame plate 11 elongated in the first and second vertical directions, The bed 1a is formed by being supported by the lower portions 111 and 121 of the twelve portions 12 and the lower rigid frame plate 13 that is short in the vertical direction. In the present specification, “support” means supporting in a removable state. Further, in this specification, “horizontal” means passing horizontally. Further, the first and second rigid frame cross members 15 and 16 are disposed so as to be spaced apart from each other in the vertical direction.

  In addition, the sewing machine frame 1 includes upper portions 112 and 122 of the first and second rigid frame plates 11 and 12 that are elongated in the vertical direction and an upper rigid frame plate 14 that is elongated in the vertical direction in front of the sewing direction SL of the sewing machine, The upper shaft 3 that drives the eyelid / lid needle drive module 22, the presser module 21, and the feed module 31 by the third and fourth rigid frame cross members 17 and 18 that are respectively connected at the rear is the first and second vertical members. The arm 1b is formed by being supported by and traversed by the upper portions 112 and 122 of the rigid frame plates 11 and 12 that are long in the direction and the upper rigid frame plate 14 that is short in the vertical direction. The third and fourth rigid frame cross members 17 and 18 are arranged so as to be spaced apart from each other in the vertical direction.

  Further, the lower portions 111 and 121 of the rigid frame plates 11 and 12 elongated in the first and second vertical directions and the lower rigid frame plate 13 elongated in the vertical direction are used as the bed 1a of the sewing machine frame 1, Since the upper portions 112 and 122 of the second vertically elongated rigid frame plates 11 and 12 and the vertically elongated upper rigid frame plate 14 are used as the arm 1b of the sewing machine frame 1, the former rigid frame plate The width is wider than the latter rigid frame plate. Furthermore, holes 121a and 13a for disposing the lower shaft 4 are formed in the lower portion 121 of the second rigid frame plate 12 elongated in the vertical direction and the lower rigid frame plate 13 elongated in the vertical direction, respectively. Grooves 112a, 122a, and 14a for disposing the upper shaft 3 are formed in the upper portions 112 and 122 of the two rigid frame plates 11 and 12 that are elongated in the vertical direction and the upper rigid frame plate 14 that is elongated in the vertical direction. . The support leg 1c of the sewing machine frame 1 is connected by connecting arms 113 and 123 that connect the lower portions 111 and 112 and the upper portions 112 and 122 of the rigid frame plates 11 and 12 that are elongated in the first and second vertical directions. Will be formed.

  As described above, the structure of the sewing machine frame 1 is a frame structure in which the bed 1a, the arm 1b, and the supporting footnote portion 1c are formed by connecting the rigid frame plate serving as the ribs with the rigid frame cross member serving as the spine. When modifying the frame, it is only necessary to change the dimensions of the frame components at the modification site, and it is possible to make the frame more robust and lighter, so that it can be manufactured at low cost. Further, since the sewing machine frame 1 is made into parts, each functional element can be easily mounted on the rigid frame plate itself by modularizing the functional elements according to the function of the sewing machine.

  Moreover, since the rigid frame plate can be individually processed even if it is formed of a cast product of iron or aluminum, high machining accuracy is not required. Therefore, the sewing machine frame 1 is cast using a large mold as in the case of a conventional sewing machine frame that is a heavy product, or is processed through a complicated work process using a special large machine tool. You do n’t have to. Further, each rigid frame cross member may be formed of a tube or a rod made of a metal material such as steel or aluminum in order to connect the rigid frame plates and to give rigidity to the sewing machine frame itself.

  To attach the upper shaft 3 to the sewing machine frame 1 having such a structure, as shown in FIGS. 1, 2 and 10, the upper portions of the rigid frame plates 11 and 12 elongated in the first and second vertical directions are used. The upper shaft 3 is arranged in the grooves 112a and 122a formed in the 112 and 122 and the groove 14a formed in the upper rigid frame plate 14 that is short in the vertical direction, and the upper shaft 3 is elongated in the first vertical direction. The rigid frame plate 11 is fixed to the groove 112a of the upper portion 112 of the rigid frame plate 11 with a mounting seat 3A, and is fixed to the groove 14a of the upper rigid frame plate 14 that is short in the vertical direction by the mounting seat 3B.

Further, in order to mount the presser module 21 and the eyelet / lid needle driving module 22 connected to the upper shaft 3 on the sewing machine frame 1, as shown in FIGS. An upper rigid frame plate 14 that is short in direction is used. Specifically, the needle / lid needle drive module mounting base 23 of the needle / lid needle drive module 22 is fixed to the outer side surface 14b of the upper rigid frame plate 14 that is short in the vertical direction by a fastening member such as a bolt.
It should be noted that the fixing position of the eyelid / lid needle drive module mounting base 23 may be positioned by a positioning pin.

  In order to attach the feed module 31 to the sewing machine frame 1, as shown in FIGS. 1, 2, and 7, a lower rigid frame plate 13 that is short in the vertical direction is used at the lateral tip of the bed 1a. Specifically, the feed module 31 fixes the feed module attachment plate 311 to the bottom surface 13b of the lower rigid frame plate 13 that is short in the vertical direction by a fastening member such as a bolt. Note that the fixing position of the feed module mounting plate 311 may be positioned by positioning pins.

  In order to attach the rotary hook device 42 to the sewing machine frame 1, as shown in FIGS. 1, 2, and 8, the lower rigid frame plate 13 that is short in the vertical direction is used at the lateral tip of the bed 1a. Specifically, the rotary hook device 42 inserts the mounting boss portion 421a of the half rotary hook 421 into the hole 13a of the lower rigid frame plate 13 that is short in the vertical direction, and is fixed by a fastening member such as a bolt. The attachment boss portion 421a is a portion into which the lower shaft 4 is rotatably inserted.

  Further, in order to mount the thread pull-out operator 431 on the sewing machine frame 1, as shown in FIGS. 1, 2, and 8, it is arranged in front of the sewing direction of the sewing machine protruding from the lower rigid frame plate 13 that is short in the vertical direction. The sub-plate 131 fixed to the horizontal direction front-end | tip of the made 1st, 2nd rigid frame crossing members 15 and 16 is used. Specifically, the above-described yarn pulling actuator swing shaft 437 of the yarn pulling drive mechanism 43 is rotatably mounted on the sub plate 131.

  In this way, the presser module 21 and the eyelet / lid needle driving module 22 can be mounted on the vertically short upper rigid frame plate 14 located at the lateral tip of the arm 1b, and the feed module 31 and the stitch forming device. 41 can be mounted on the lower rigid frame plate 13 and the sub plate 131 that are short in the vertical direction located at the lateral tip of the bed 1a, so that the presser module 21, the heel / lid needle drive module 22, the feed module 31, and the sewing The eye forming device 41 can be mounted at an appropriate position on the frame so that it can operate according to each function.

  Further, as shown in FIGS. 1, 7, and 9, the throat plate 2 is disposed on the upper portion of the stitch forming device 41, so that the lower rigidity is short in the vertical direction like the stitch forming device 41. Mounted on the frame plate 13. Specifically, the mounting seat 2a is fixed to the outer side surface 13c of the lower rigid frame plate 13 that is short in the vertical direction by a fastening member such as a bolt, and the needle plate 2 is fixed to the mounting seat 2a by a fastening member such as a bolt. . In addition, you may make it position the fixing position of the attachment seat 2a or the needle plate 2 with the pin for positioning.

  In this way, by attaching the needle plate 2 to the lower rigid frame plate 13 that is short in the vertical direction via the mounting seat 2a, the presser module 21 and the eyelet / lid needle drive module 22 are sewn and operated at appropriate positions. Can be attached to.

  The single-thread locked hand stitch sewing machine constructed in this way has hand stitch stitches on the surface of the sewing object Fa and locks on the back surface in cooperation with the needle 221, the half-turn hook 421, and the thread pull-out actuator 431. The stitches are formed as a jump stitch set, and the workpiece Fa is fed by the feed pitch 312 by the feed dog 312 in the first stroke of the heel needle 221 and is fed by the feed dog 312 in the second stroke of the heel needle 221. The sewing product Fa is fed by a pitch between stitches for hand stitch stitches.

  First, when the heel needle 221 that linearly reciprocates in the vertical direction descends from the top dead center in the first stroke, penetrates the workpiece Fa placed on the needle plate 2 and rises from the bottom dead center, the rotation is reversed half a turn. The sewing thread pulled out from the inner hook of the half-rotating hook 421 and being tensioned by the thread pull-out operator 431 and in contact with the barb needle 221 is captured by the thread catch bar 221a. Further, while the heel needle 221 is pulled out of the sewing object Fa in the first stroke and is raised and passes through the top dead center, the sewing machine Fa is fed by the first stitch pitch by the feed dog 312 and the sewing needle 221 that has captured the sewing thread is provided. The thread is tightened by ascending and the inner hook of the half-turn hook 421 is further reversed.

  Next, when the heel needle 221 descends from the top dead center in the second stroke, penetrates the workpiece Fa, and ascends from the bottom dead center, the sewing thread captured by the thread capturing collar 221a is rotated halfway forward. The hook of the inner hook of the rotary hook 421 is scooped with the tip of the inner hook, and the trapped sewing thread is released from the thread trapping hook 221a by the normal rotation of the inner hook of the half rotary hook 421. Then, the sewing thread which is released by being squeezed by the sword tip of the inner rotary hook 421 is further rotated forward by the inner rotary hook 421 between the outer rotary hook 421 and the inner hook. The sewing thread is inserted into the bobbin accommodated in the bobbin case 422 of the half-turn hook 421, and the sewing thread wound around the half-turn hook 421 is tightened. In addition, while the heel needle 221 is pulled out from the sewing object Fa in the second stroke and is raised and passes through the top dead center, the sewing object Fa is fed by the feed dog 312 at a pitch between the first stitches, so that the sewing object Fa is obtained. Hand stitch stitches can be formed on the front surface, and lock stitches can be formed on the back surface. By repeating this process, it is possible to sew with a single thread lock hand stitch.

  In the above-described sewing machine frame 1, the lower vertical rigidity of the second vertical direction is reinforced between the lower part 121 of the rigid frame plate 12 elongated in the second vertical direction and the lower rigid frame plate 13 elongated in the vertical direction. A frame plate 13 ′ is disposed, and a second vertically elongated upper rigid frame is reinforced between the upper portion 122 of the second vertically elongated rigid frame plate 12 and the vertically elongated upper rigid frame plate 14. By disposing the plate 14 ', the dimensions of the sewing machine can be modified and the rigidity of the frame can be enhanced. Further, a hole 13'a for supporting the lower shaft 4 is formed in the lower rigid frame plate 13 'that is short in the second vertical direction of reinforcement, and the feed module mounting plate 311 is bolted to the bottom surface 13'b. The upper rigid frame plate 14 ′ that is short in the second vertical direction of reinforcement is formed with a groove 14′a for supporting the upper shaft 3.

  In the sewing machine frame 1 described above, the first and second rigid frames that are reinforced between the two first and second rigid frame cross members 15 and 16 that are connected in front and rear in the sewing direction SL of the sewing machine, respectively. By arranging the cross members 19, 19 ', the rigidity of the frame can be enhanced.

  A transmission module 51, which is a specific example of the transmission mechanism described above, is long in the first vertical direction in the supporting leg column 1c of the sewing machine frame 1, as shown in FIGS. 1, 2, 7, and 10. It is mounted on the upper part 112 of the rigid frame plate 11 and the upper part 122 of the second vertically long rigid frame plate 12, and transmits the driving motion to the eyelid / lid needle drive module 22 by the upper shaft 3 for needle drop control. This is to transmit the driving motion by the upper shaft 3 to the feed module 31 to perform the cloth feed control of the sewing product.

  The transmission module 51 is a rotary motion of the upper shaft 3 that is rotated by the pulley group 511 driven by the motor M via the drive belt group 512, and the needle / lid needle drive module 22, the feed module 31, and the rotary hook device 42. Can be interlocked so that one thread can be sewn. Specifically, a horizontal feed eccentric cam mechanism 315 that reciprocally rotates a horizontal feed shaft 313 that drives the feed module 31, a vertical feed eccentric cam mechanism 316 that reciprocally rotates the vertical feed shaft 314 of the feed module 31, and the lower shaft 4. A connecting mechanism 317 for driving a drive module 52 that reciprocally rotates the upper shaft 3 is mounted on the upper shaft 3.

  When the upper shaft 3 rotates, the horizontal feed eccentric cam mechanism 315 can reciprocate and rotate the horizontal feed shaft 313 by moving the horizontal feed vertical rod 315a up and down by an eccentric motion. When the upper shaft 3 rotates, the vertical feed eccentric cam mechanism 316 can reciprocate and rotate the vertical feed shaft 314 by moving the vertical feed vertical rod 316a up and down by eccentric motion. The coupling mechanism 317 includes an intermediate shaft drive pulley 317a fixed to the upper shaft 3, an intermediate shaft driven pulley 317b fixed to the intermediate shaft 521 of the drive module 52 that reciprocally rotates the lower shaft 4, and an intermediate shaft drive. A timing belt TB is wound around a pulley 317a and an intermediate shaft driven pulley 317b (see FIG. 8).

  Therefore, the transmission module 51 can be mounted at an appropriate position on the sewing machine frame 1 suitable for driving the eyelid / lid needle driving module 22 and the feeding module 31.

  The motor M is fixed to the side surface 123a of the connecting arm 123 of the rigid frame plate 12 elongated in the second vertical direction by a fastening member such as a bolt. Note that the fixed position of the motor M may be positioned by a positioning pin. The pulley group 511 is fixed to one end of the upper shaft 3 and fixed to the side surface 113a of the connecting arm 113 of the rigid frame plate 11 elongated in the first vertical direction by a fastening member such as a bolt with a mounting plate 511a. Note that the fixing position of the mounting plate 511a may be positioned by a positioning pin.

  The drive module 52, which is a specific example of the drive mechanism described above, includes a rigid frame plate that is long in the first vertical direction at the support leg portion 1c of the sewing machine frame 1, as shown in FIGS. 11 and a lower portion 121 of the rigid frame plate 12 elongated in the second vertical direction, and drives the stitch forming device 41 in conjunction with the transmission module 51.

  When the intermediate shaft 521 is rotated by the transmission module 51, the drive module 52 drives the rotary hook device 42 by rotating the lower shaft 4 forward and backward by half rotation and driving the rotary hook device 42 and driving the yarn withdrawal actuator of the yarn withdrawal drive mechanism 43. With a mechanism configuration in which the cam 432 is rotated to drive the thread drawing operator 431, it can be mounted on the sewing machine frame 1 by the drive module mounting base 53. Specifically, the sewing direction of the sewing machine of the rigid frame plate 11 that is long in the first vertical direction and the long rigid frame plate 12 that is long in the second vertical direction in the support leg portion 1c is attached to the drive module mounting base 53. It fixes to each front side of this with fastening members, such as a volt | bolt. Note that the fixed position of the drive module mounting base 53 may be positioned by positioning pins.

  Therefore, the drive module 52 can be mounted at an appropriate position on the sewing machine frame 1 suitable for driving the stitch forming device 41 in conjunction with the transmission module 51.

  In the single-thread locked hand stitch sewing machine described above, when the heel needle 221 descends in the second stroke of the heel needle 221, the thread of the heel needle 221 is between the needle tip of the heel needle 221 and the workpiece Fa. Since the thread caught by the catching bar 221a is loosened from the tensioned state, the thread in the slackened state may be pierced by the needle tip of the lowering needle 221. Therefore, as shown in FIGS. 1, 2, and 3, the sewing thread captured by the thread catching bar 221a when the barb needle 221 descends from the top dead center in the second stroke is used as the needle tip of the barb needle 221 and the workpiece Fa. It is good to provide the yarn gathering mechanism 61 which carries out yarn gathering in between.

  The thread pulling mechanism 61 drives a thread pulling 611 formed in an L shape that hooks the slack of thread generated between the needle tip of the heel needle 221 and the sewing object Fa with a movement locus that becomes an ellipse in a horizontal plane. The mechanism is incorporated in the eyelid / lid needle drive module mounting base 23 of the eyelid / lid needle drive module 22. That is, the arm 1b is attached to the upper rigid frame plate 14 that is short in the vertical direction at the lateral tip of the arm 1b. Therefore, the yarn gathering mechanism 61 can be mounted on the sewing machine frame 1 suitable for yarn gathering.

  Moreover, in the single-thread locked hand stitch sewing machine described above, the workpiece Fa can only be fed linearly. Therefore, as shown in FIGS. 1, 2 and 10, the needle 221 descends from the top dead center and penetrates the workpiece Fa, and rises from the bottom dead center before being pulled out of the workpiece Fa. Rotation operation / straight line for manually rotating the sewing machine Fa about the feeding direction of the sewing object Fa by releasing the pressing and holding of the presser foot 211 that presses and holds the sewing product Fa on the needle plate 2. A feed switching mechanism 71 may be provided. This rotation operation feeding is called “free curve sewing”. In the free curve sewing, the direction of feeding the sewing product can be operated in an arbitrary direction of the sewer, so that it is possible to easily perform the small-turn curve sewing at a constant stitch pitch and a stitch pitch.

  The rotation operation / linear feed switching mechanism 71 transmits the rotational motion of the upper shaft 3 to the presser module 21, and the heel needle 221 descends from the top dead center and penetrates the workpiece Fa and rises from the bottom dead center. The press release mechanism that releases the presser holding of the presser foot 211 that presses and holds the sewing product Fa on the needle plate 2 and enables manual rotation operation with the barb needle 221 as a rotary shaft before the sewing product Fa is pulled out from the sewing product Fa. 711. The press release mechanism 711 is incorporated in the upper shaft 3 with a cam mechanism configuration that switches between free curve sewing and linear sewing by a switching lever 712 provided in the handle module 81. In addition, a press release shaft 711a that rotates in order to maintain or release the press holding by the presser foot 211 of the presser module 21 in conjunction with the press release mechanism 711 is elongated in the first and second vertical directions. The upper portions 112 and 122 of the rigid frame plates 11 and 12 and the upper rigid frame plate 14 that is short in the vertical direction (when the upper rigid frame plate 14 ′ that is short in the second vertical direction is added, the plate is also applicable). The sewing machine is rotatably inserted in each rear side in the sewing direction SL of the sewing machine.

  Accordingly, the rotation operation / linear feed switching mechanism 71 can be mounted at an appropriate position of the sewing machine frame 1 that can be interlocked with the presser module 21.

  In the rotation operation / linear feed switching mechanism 71 configured as described above, when the switching lever 712 is operated for free curve sewing, the press release mechanism 711 raises the presser foot 211 from the bottom dead center by the press release shaft 711a. Then, before coming out of the sewing product Fa, the presser foot 211 that presses and holds the sewing product Fa on the throat plate 2 is released and the needle 221 can be manually rotated around the rotary shaft so that it can be manually rotated. When the operation is performed, the press release mechanism 711 keeps the press holding by the presser foot 211 on the press release shaft 711a.

  Further, in the above-described single-thread locked hand stitch sewing machine, hand stitch stitches are formed on the surface of the sewing object Fa and locks are formed on the back surface by the cooperation of the needle 221, the rotary hook device 42, and the thread drawing operation element 431. The stitches are formed as a jump stitch set, and the workpiece Fa is fed by the feed module 31 at the first stroke of the heel needle 221, and the feed module 31 feeds the stitch pitch for the hand stitch stitch by the feed module 31. When the sewing product Fa is pitch-fed between stitches for hand stitch stitches, the stitch pitch feed amount for stitch pitch feed and the pitch feed amount between stitches for pitch feed between stitches are constant. . Therefore, as shown in FIGS. 1, 2, and 8, a feed amount setting mechanism 91A for setting a stitch pitch feed amount for stitch pitch feed and an inter-stitch pitch feed amount for stitch pitch feed, and 1 A feed mode switching mechanism 91B that sequentially switches to each sewing product feed mode corresponding to each stitch pitch feed and inter-stitch pitch feed for each jump stitch set may be provided. The “skip stitch set” means a set of hand stitch stitches and lock stitches.

  The feed amount setting mechanism 91A and the feed mode switching mechanism 91B operate the stitch feed adjusting lever 911 and the inter-stitch feed adjusting lever 912 to drive the feed module 31 according to the operation via the transmission module 51. The stitch pitch feed amount for stitch pitch feed and the pitch feed amount between stitches for pitch feed between stitches can be changed, and stitch pitch feed and stitch pitch feed for each jump stitch set can be changed. These are incorporated in the drive module mounting base 53 of the drive module 52 with a mechanism configuration that sequentially switches to each sewing product feed mode. That is, it is mounted between the rigid frame plate 11 elongated in the first vertical direction and the rigid frame plate 12 elongated in the second vertical direction. Accordingly, the feed amount setting mechanism 91A and the feed mode switching mechanism 91B are disposed in the drive module 52, and at the proper position of the sewing machine frame 1 that can be interlocked with the eyelet / lid needle drive module 22, the rotary hook device 42, and the thread drawing operation element 431. Can be installed.

  Further, as shown in FIG. 11, the single-thread locked hand stitch sewing machine described above is wound around a bobbin housed in a bobbin case 422 of a half-turn hook 421, a power supply unit for supplying power to the sewing machine. A thread winding part for winding the worn sewing thread and a switch part for controlling the sewing operation of the sewing machine can be modularized and mounted on the sewing machine frame 1 as a power supply module 92, a thread winding module 93 and a switch box module 94.

  The power supply module 92 is incorporated in the power supply box 921, and the power supply box 921 is extended in the upper part 112 of the rigid frame plate 11 elongated in the first vertical direction and the second vertical direction in the support footnote portion 1 c of the sewing machine frame 1. The upper portion 122 of the long rigid frame plate 12 is fixed to each rear side in the sewing direction of the sewing machine by a fastening member such as a bolt. Note that the fixed position of the power supply box 921 may be positioned by a positioning pin.

  The pincushion module 93 is incorporated in the pincushion module mounting base 931, and the pincushion module mounting base 931 is fastened with bolts or the like on the rear side in the sewing direction of the sewing machine of the upper end 11a of the rigid frame plate 11 elongated in the first vertical direction. It is fixed by the member. Note that the fixed position of the bobbin module mounting base 931 may be positioned by a positioning pin.

  The switch box module 94 is incorporated in the switch box 941, and the switch box 941 is fixed to the outer side surface 111a of the lower portion 111 of the rigid frame plate 11 elongated in the first vertical direction by a fastening member such as a bolt. Note that the fixed position of the switch box 941 may be positioned by a positioning pin.

  As described above, the power supply module 92, the bobbin winding module 93 and the switch box module 94 can also be mounted at appropriate positions on the sewing machine frame 1.

  Each of the modules described above uses a mechanism similar to the basic configuration of the single-thread lock stitched hand stitch forming method and sewing machine of Japanese Patent Application No. 2006-26678, filed on December 28, 2006, The sewing operation is the same.

  Further, the sewing machine frame 1 on which each module and the like are mounted is commercialized by mounting a cover (not shown).

  Although the present invention has been described with the specific embodiments shown in the drawings, the present invention is not limited to the embodiments shown in the drawings, and is known so far as long as the effects of the present invention are achieved. It goes without saying that any configuration can be adopted.

FIG. 2 is an overall perspective view showing a state in which various modules are attached to the sewing machine frame in a preferred embodiment of the sewing machine to which the frame structure of the present invention is applied. It is explanatory drawing which shows the relationship between the frame structure of this invention, various modules, etc. FIG. FIG. 4 is a partially enlarged view showing the relationship between the heel needle and the lid needle, in which (A) is a view in which the thread catching heel of the heel needle is closed by the lid needle, and (B) is a view in which the thread catching heel of the heel needle is in the open state. It is. It is explanatory drawing which shows a pseudo | simulated hand stitch stitch structure. It is a perspective view which shows the relationship between a heel / lid needle drive module and a presser module and a sewing machine frame. FIG. 4 is a perspective view showing the relationship between the heel needle and the lid needle, (A) is a diagram in which the thread catching heel of the heel needle is closed by the lid needle, and (B) is a diagram in which the thread catching heel of the needle is in the open state. is there. It is a perspective view which shows the relationship between a feed module and a sewing machine frame. It is a perspective view which shows the relationship between a drive module and a stitch formation apparatus, and a sewing machine frame. It is a perspective view which shows the frame structure of this invention. It is a perspective view which shows the relationship between a transmission module, a rotation operation / linear feed switching mechanism, a handle module, and a sewing machine frame. It is a perspective view which shows the relationship between a power supply module, a bobbin module, a switch box module, and a sewing machine frame.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Sewing machine frame 1a …… Bed 1b …… Arm 1c …… Supporting column 11 …… Rigid frame plate elongated in the first vertical direction 12 …… Rigid frame plate elongated in the second vertical direction 13 …… Lower vertical rigid frame plate 13 ′ …… Second vertical lower rigid frame plate 14 …… Vertical upper rigid frame plate 14 ′ …… Second vertical direction Short upper rigid frame plate 15... First rigid frame transversal material 16... Second rigid frame transversal material 17... 3rd rigid frame transversal material 18. 19 …… Reinforcing first rigid frame cross member 19 ′ …… Reinforcing second rigid frame cross member

2 …… Needle plate 3 …… Upper shaft 4 …… Lower shaft 21 …… Presser module 22 …… 鉤 needle / lid needle module 221 …… 鉤 needle 221a …… Thread catch 鉤 31 …… Feed module 41 …… Stitch forming device 42 …… Rotary hook device 51 …… Transmission module 52 …… Drive module 61 …… Thread shifting mechanism 71 …… Rotation / linear feed switching mechanism 91A …… Feed amount setting mechanism 91B …… Feed mode switching mechanism 431 …… Thread pull-out actuator Fa ...

Claims (11)

The work to be sewn is pressed and held on the throat plate by the presser module, and the feed module advances by one stitch pitch in the stitching direction, and passes through the work to be sewn and linearly moved up and down by the heel / lid needle drive module. A sewing machine frame structure that forms a stitch with a thread on the sewing product by a stitch forming device including a rotary hook device that reciprocally moves and cooperates with a hook needle that is provided with a thread catching rod.
A first vertically elongated rigid frame plate and a second vertically elongated rigid frame plate that are oriented parallel to the sewing direction of the sewing machine and spaced apart laterally; and
A lower rigid frame plate vertically short arranged in a lateral direction spaced apart on the left side at the bottom of the rigid frame plate elongated in the first and second vertical directions when viewed in the sewing direction of the sewing machine;
An upper rigid frame plate that is long in the first and second vertical directions when viewed in the sewing direction of the sewing machine, and an upper rigid frame plate that is short in the vertical direction and spaced apart on the left side. ,
First and second rigidity connecting the lower portion of the first and second vertically rigid frame plates and the lower portion of the vertically rigid frame plate at the front and rear in the sewing direction of the sewing machine, respectively. A lower shaft that drives the stitch forming device by a frame cross member is supported by a lower portion of the rigid frame plate that is long in the first and second vertical directions and a lower rigid frame plate that is short in the vertical direction. Forming the bed being traversed,
Third and fourth stiffnesses for connecting the upper portion of the first and second vertically rigid frame plates and the upper portion of the vertically rigid frame plate at the front and rear in the sewing direction of the sewing machine, respectively. An upper shaft for driving the eyelet / lid needle drive module, the presser module and the feed module by means of a frame crossing member is provided above the rigid frame plate elongated in the first and second vertical directions and in the vertical direction. Forms an arm that is supported by a short upper rigid frame plate and passed through,
A frame structure of a sewing machine, wherein the bed and the arm are connected to form a support leg portion that supports the arm. The sewing product is pressed and held on the needle plate by the presser module, and is advanced by one stitch pitch in the sewing direction by the feed module, and the sewing product penetrates the sewing product and is linearly moved up and down by the needle / lid needle drive module. A sewing machine frame structure that forms a stitch with a thread on the sewing product by a stitch forming device including a rotary hook device that reciprocally moves and cooperates with a hook needle that is provided with a thread catching rod.
A first vertically elongated rigid frame plate and a second vertically elongated rigid frame plate that are oriented parallel to the sewing direction of the sewing machine and spaced apart laterally; and
A lower rigid frame plate vertically short arranged in a lateral direction spaced apart on the left side at the bottom of the rigid frame plate elongated in the first and second vertical directions when viewed in the sewing direction of the sewing machine;
An upper rigid frame plate that is long in the first and second vertical directions when viewed in the sewing direction of the sewing machine, and an upper rigid frame plate that is short in the vertical direction and spaced apart on the left side. ,
First and second rigidity connecting the lower portion of the first and second vertically rigid frame plates and the lower portion of the vertically rigid frame plate at the front and rear in the sewing direction of the sewing machine, respectively. A lower shaft that drives the stitch forming device by a frame cross member is supported by a lower portion of the rigid frame plate that is long in the first and second vertical directions and a lower rigid frame plate that is short in the vertical direction. Forming the bed being traversed,
Third and fourth stiffnesses for connecting the upper portion of the first and second vertically rigid frame plates and the upper portion of the vertically rigid frame plate at the front and rear in the sewing direction of the sewing machine, respectively. An upper shaft for driving the eyelet / lid needle drive module, the presser module and the feed module by means of a frame crossing member is provided above the rigid frame plate elongated in the first and second vertical directions and in the vertical direction. Forms an arm that is supported by a short upper rigid frame plate and passed through,
While connecting the bed and the arm to form a support pedestal that supports the arm,
The eyelid / lid needle drive module connected to the presser module and the upper shaft is attached to the upper rigid frame plate that is short in the vertical direction at the distal end in the lateral direction of the arm,
The frame structure of a sewing machine, wherein the rotary hook device connected to the feed module and the lower shaft is attached to a lower rigid frame plate that is short in the vertical direction at a distal end of the bed in the lateral direction.   The seam forming device is fixed to a lateral tip of the first and second rigid frame cross members disposed in front of the sewing direction of the sewing machine protruding from the lower rigid frame plate that is short in the vertical direction. And a thread pulling actuator for tightening the thread that has passed through the rotary hook device while tightening the thread around the hook needle by driving the rotary hook device. The frame structure of the sewing machine according to claim 2.   A reinforcing second vertically short lower rigid frame plate is disposed between a lower portion of the second vertically rigid frame plate and a vertically short lower rigid frame plate; and 2. A second upper rigid frame plate that is reinforced in a vertical direction is disposed between an upper portion of a rigid frame plate that is elongated in the vertical direction and an upper rigid frame plate that is elongated in the vertical direction. The frame structure of the sewing machine according to claim 3.   The reinforcing first and second rigid frame crossing members are disposed between the first and second rigid frame crossing members that are connected respectively in front and rear in the sewing direction of the sewing machine. The frame structure of the sewing machine according to any one of claims 1 to 3.   4. The sewing machine according to claim 1, wherein the needle plate is attached to a lower rigid frame plate that is short in the vertical direction in an upper portion of the stitch forming device. 5. Frame structure.   When the heel needle descends from the top dead center, a thread-feeding mechanism for squeezing the thread captured by the thread-capturing heel between the needle tip of the heel needle and the workpiece is the vertical at the lateral tip of the arm. 4. The sewing machine frame structure according to claim 3, wherein the sewing machine frame structure is mounted on an upper rigid frame plate that is short in a direction.   A pressing and holding operation for pressing and holding the sewing product on the needle plate before the heel needle descends from the top dead center and penetrates the sewing product and rises from the bottom dead center and comes out of the sewing product. A rotation operation / linear feed switching mechanism for releasing and manually moving the feed direction of the sewing object with the heel needle as a rotation axis is long in the second vertical direction at the lateral rear end of the arm. 4. The sewing machine frame structure according to claim 3, wherein the sewing machine frame structure is mounted on an upper portion of a long rigid frame plate.   In the upper part of the rigid frame plate elongated in the first vertical direction and in the upper part of the rigid frame plate elongated in the second vertical direction in the support pedestal, the upper shaft is attached to the eyelid / lid needle drive module. The transmission module is mounted with a transmission module for performing needle drop control and transmitting the drive movement with the upper shaft to the cloth feed control for the sewing product. The frame structure of the sewing machine according to 3.   In the support pedestal portion, between the lower portion of the rigid frame plate elongated in the first vertical direction and the lower portion of the rigid frame plate elongated in the second vertical direction, the transmission module is interlocked with the transmission module. 10. The sewing machine frame structure according to claim 9, wherein a drive module for driving the stitch forming device is mounted.   Between the rigid frame plate elongated in the first vertical direction and the rigid frame plate elongated in the second vertical direction and arranged in the drive module, the hook needle, the rotary hook device, and the thread pull-out A hand stitch seam is formed on the surface of the sewing product and a lock stitch is formed on the back surface as a jump stitch set by the cooperation of the actuator, and the sewing product is stitched by the feed module in the first stroke of the heel needle. A stitch pitch feed for the stitches is performed, and the stitch pitch feed is performed when the workpiece is fed by the feed module between the hand stitch stitches in the second stroke of the needle. A feed amount setting mechanism for setting the stitch pitch feed amount and the inter-stitch pitch feed amount between stitches, and the stitches for each jump stitch set Pitch feed, the frame structure of the sewing machine according to claim 10, wherein said and sequentially switching the feed mode changeover mechanism, respectively the inter-stitch pitch feed to the corresponding workpiece feed mode is characterized in that it is fitted.

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