TW200928037A - Bobbin thread feeder of sewing machine - Google Patents

Abstract

To provide a bobbin thread feeder of sewing machines which is capable of surely feeding a bobbin thread at an appropriate tension and has a simple structure.An inner rotary hook 20 of a horizontal rotary hook 30 provided in a sewing machine frame is configured to detachably store a bobbin thread bobbin 21 through a bobbin thread bobbin storage hole 17. A thread tension bracket and a thread tension spring are attached along the internal circumference of the inner rotary hook 20 with their superposed with each other and functioned as a tension generation part 22 for applying a resistance to a pull-out of the bobbin thread led out through a space between the thread tension bracket and the thread tension spring. Above the inner rotary hook 20, a needle plate 16 having an opening part for taking in/out the bobbin thread bobbin 21 is provided. The needle plate 16 is formed with a guide slit 27 for guiding the bobbin thread, and the guide slit 27 is formed substantially linearly in the extension direction of a superposed part of the thread tension bracket and the thread tension spring.

Description

200928037 IX. Description of the invention: [Technical field to which the invention pertains] Disassembly line. The invention relates to a lower line feeding device for a horizontal machine for sewing a reel of a trough, which can be easily set under the prior art [previous technique] in the sewing machine at home = use instead of vertical Dad has the need to install the horizontal dad's model in the state of the squatting machine: the t-reel housing is the mainstream: in the case of the type and the horizontal-stitching slitting machine, 'because the lower thread reel is inserted into the inner kettle from the upper opening of the water tank, therefore The lower wire supply device is provided to reliably supply the lower wire. For example, in Patent Document 1, the inner container-shaped housing portion of the inner dad is located below the lower thread reel housing opening provided in the needle plate. The user directly inserts the lower thread reel from the upper thread reel into the inner dad and receives it. Therefore, as in the case of using the vertical dad, the state in which the lower thread reel is stored in the reel box is not necessarily provided in the dad, and the operation of setting the lower-line bobbin can be easily performed. A tension generating unit is provided on the lower line supply device to apply a pull-out impedance to the lower line led from the lower thread reel. In the state where the tension adjusting portion is overlapped with the wire adjusting plate spring, the tension generating portion is attached to the concave portion formed on the inner circumference of the inner dad of the inner dad. When the user puts the lower thread reel as described above, the τ line pulled out by the lower thread reel passes through the operation of the tension generating portion. When the lower thread is improperly actuated by the tension generating portion and the sewing machine is actuated as a result, the tension of the lower thread is weakened, the supply amount of the lower thread is excessively large, and the balance with the upper thread is broken, so that the sewing operation cannot be performed.

2272-9469-PF 5 200928037 Here, the upper line drawn from the lower thread reel is guided to the upper side of the tension generating portion of the inner document 1 + to a plate-shaped guide that is disposed substantially in the horizontal direction. member. The drawn lower thread is moved by the guide member guide arch 1 provided above the tension generating portion. The tension generating unit is introduced between the lower wire adjusting plate and the wire adjusting plate spring. Therefore, the user guides the lower thread pulled out from the lower thread reel along the edge of the needle board to set the lower thread by a simple job. π 专利 ❹ 专利 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 - - - - - - - - - - - - - - - - - - - - - - - - - - In Patent Document 1, only the other guide members are required to guide the lower thread, and there is a problem that the structure of the apparatus is complicated by the lower line for protecting the cymbals, and eight. Further, in Patent Document 2, it is not necessary to provide another guide member, and the shape of the needle plate is processed into an appropriate shape in accordance with the shape and position of the lower thread reel. However, it is difficult to reduce the manufacturing cost, and the households with high price competitiveness require a simpler construction. The object of the present invention is to provide a lower thread of the sewing machine, a device for providing a positive force to the lower thread, and a simple structure. [Means for Solving the Problem] In order to achieve the above-mentioned purpose, the lower thread supply device 2 of the slitting machine of the first invention is detachably accommodated in the inner center of the sewing machine housing at the level I of the sewing machine frame, and the thread is detachably accommodated by the lower thread reel. The state plate double/, the line state plate, the yellow line is in the state of coincidence along the inner circumference of the inner kettle, and the tension is generated.

2272-9469-PF 200928037 The 'down line' derived between the line state plate and the line state leaf spring applies an impedance to the pull-out of the lower wire, and has a needle plate which is disposed above the inner dad. The opening has an opening for the lower thread reel, and the needle plate has an inducing slit for inducing the lower thread, and the inducing slit is formed in a substantially linear shape in a direction in which the line state plate overlaps with the line state leaf spring. According to the first aspect of the invention, the lower thread reel is detachably received by the lower thread reel receiving opening in the inner pot of the horizontal tank provided in the sewing machine housing. The wire adjusting plate and the wire adjusting spring are attached to the inner tub in a state where the inner circumference thereof is heavy, and a tension generating portion that gives a pull-out resistance between the wire adjusting plate and the wire adjusting plate spring is given. Above the inner dad, there is a needle plate having an opening for the lower thread reel, and an induction slit for inducing the lower thread is formed on the needle plate. The inducing slit is formed in a straight and linear shape in the extending direction of the portion where the in-line adjusting plate and the wire adjusting spring overlap, so that the lower side of the inner I of the lower reel is accommodated, and the lower line is moved along the inducing slit. The lower line is induced to the portion where the wire adjustment plate 重 and the wire adjustment spring coincide with each other to give a moderate tension to the lower thread. However, even if other guide members are not provided, it is possible to provide a moderate tension to the lower line without being inferior to the function, and to provide the lower line supply only in the early manufacturing process of forming a slit that is slightly linear on the needle plate. The device can reduce manufacturing costs. According to a first aspect of the invention, in the first aspect of the invention, the needle plate includes a tangential portion, and the length (4) of the end of the slit from the lower (4) line (4) to the end of the slit is cut.

2272-9469-PF 200928037 In the first invention, the tangential portion is provided, and the lower line is cut at a position where the length of the lower thread drawn from the lower thread reel is longer than the length of the end of the induction slit. When the length of the τ line is pulled out from the lower thread reel, the lower line that is pulled out from the front end of the outer dad and the upper line are complicatedly wrapped with Ke: In the case of two short, the front end of the outer clown catches the lower line and can be damaged. ? 111, by the fact that the lower line is surely cut to the long sound of the jingle, the user can easily set the lower line. '': According to the invention, the user moves the lower thread along the induction slit by the inner line of the lower thread reel, # from the side line material to the portion where the phase plate overlaps with the smashing spring, so long time, 佶m #, mouth Give a moderate amount of tension to the lower line. However, even if there are no other (four) components, it is possible to provide a moderate tension to P without acknowledging its function, and only provide a lower-line supply device with a simple manufacturing process called sewing on the needle plate. Can reduce manufacturing costs. a ^ plus 7L [Embodiment] Hereinafter, the present invention will be described with reference to the following description of the embodiment. In the case of the operation of the sewing machine, it is explained about 4 丄. The first month and the last month are the front and rear views of the present invention. The three-dimensional diagram of the Λ Λ, 丨# view of the invention, such as the j-picture factory, & i also the outer seam of the sewing machine, 11槐1 No, the sewing machine of the above-described embodiment is configured to sew A 9 9 Α . 设有 设有 设有 设有 设有 设有 设有 设有 设有 设有 设有 设有 设有 设有 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 The lower part is provided with a needle 14 to which the needle 14 is attached. In the front end of the arm portion 13, the needle bar 15 is vertically and in a state-of-the-art drive mechanism (the sewing mechanism is not produced by the rt.) metal

2272-9469-PF 200928037 Needle plate 16. 2 is a plan view of a needle plate} 6 of the embodiment of the present invention, a pinhole i ^ through which the needle i 4 is inserted is formed on the needle plate 16, and a lower line receiving σ is formed in a rectangular shape on the front side of the pinhole 16a. Moutine i7. The pass-through valley 17 is covered by a transparent cover 18 (Fig. 1). A feed mechanism (not shown) for feeding a feed that is driven by the vertical movement of the needle bar 15 is provided below the needle c of the material c and the needle in the sewing machine frame 1 1 . At the same time, the lower thread supply device of the present embodiment is provided. ❹ f 3 is a plan view showing the structure of the lower thread supply device according to the embodiment of the present invention. Fig. 3 is a view of the thousand-faced view of the ginger, τ, τ squares from the top with the outer shackle 18 removed and the lower thread reel accommodating opening 17 open. In the lower thread feeding device of the present embodiment, the horizontal tea q Q g VIII and the liver octagonal kettle 30 are disposed below the needle plate 16. Level

Dad 3 0 is a squat that is rotated in the horizontal direction in synchronization with the needle bar 15 ~ r # A, 9 and 9, and is accommodated in the outer dad 2 q meat & I t without rotating in sync with the outer dad 29 The internal contract consists of 20. The foreign sign 2 q phase @ 4 λ λ 29 refuses to capture the front end of the lower line (not shown in the upper and lower description of the needle bar 15), said L & move down to wrap the upper and lower lines to form a suture. As shown in the perspective view of the structure of the inner pot 20 according to the embodiment of the present invention, the inner dad 2 is a slightly cylindrical container shape, and the accommodating portion of the lower thread reel 21 can be accommodated under the = roll = container Π The lower thread reel 21 is detachably inserted into the receiving portion 2〇a through the τ thread reel accommodating port 17. Further, the recess for accommodating the accommodating portion is provided on the outer peripheral portion of the accommodating portion 2A. The talent is hung in the inner pot 20 and the tension generating portion 22 is provided. The tension producing plate 23 is connected to the line ★ Zhou Xia 奠 去 丨 22 online jade spring 24 is attached, for example, to the inside of the father 2n &amp ; w 25 26 , a circle of the inner peripheral surface of the valley portion 20a of the inner pot 20

2272-9469-PF 200928037 Arc-shaped recess 20d. The wire adjusting plate 23 and the wire adjusting magazine 24 are formed in the same arc shape along the concave portion 20d, and the portion of the wire adjusting plate 23 that overlaps with the wire adjusting spring 24 is fitted into the inner circumference of the housing portion 2A of the inner pot 2〇. The arcuate recess 20d of the surface. Fig. 5 is a front elevational view of the wire adjusting plate 23 according to the embodiment of the present invention. As shown in Fig. 5, the wire adjusting plate 23 is formed with a hole 2 in the lower left portion, and is formed by a slit 23b extending from the upper edge of the upper edge toward the lower left portion to form the communication hole 23a and a hole 23a at the upper edge of the upper edge. In the vicinity, a groove portion 2 for pulling the lower line of the hole 23a from the pinhole} 6a of the needle plate} 6 is stably provided. On the wire adjusting spring 24, a segment portion 24a is provided at the right end portion, and between the wire adjusting plate 23 and the wire adjusting spring 24, there are a plurality of gaps in the slightly central portion (portion near the starting end of the slit 2牝), and the left end portion ( The portion near the hole 23a) is formed in a substantially close state. With such a configuration, the lower thread pulled out from the lower thread reel 21 is induced to the hole 23a along the slit 23b. Therefore, the lower wire resistance force is given by the clamping force of the wire adjusting plate 23 and the wire adjusting elastic spring 24, and is supplied in a state where the lower thread is given a moderate tension. In the present embodiment, as shown in Figs. 2 and 3, a substantially linear induction slit 27 is provided on the needle plate J6. The inclination angle of the induction slit 27 is substantially the same as the direction circumscribing the lower thread reel 21, that is, the direction in which the lower thread is pulled out. Specifically, the wire adjusting plate 23 and the wire adjusting spring 24 which are provided in an arc shape on the inner circumferential surface of the inner pot 20 are provided with an inducing slit 27 in a direction extending toward the main body side. Thereby, the user does not think that the lower thread is induced to the groove portion 23c above the wire adjustment plate, but is induced only along the induction slit 27, and is adjusted by the wire.

2272-9469-PF 10 200928037 The plate 23 is placed between the wire adjustment magazine 24 and gives a moderate tension to the lower thread. Further, a tangential portion 28 is provided on the needle plate 16. The tangential portion 28 includes a bottomed groove formed along the outer edge of the needle plate 16 from the end of the induction slit 27, and a cutting edge incision portion 28c that induces the lower thread to the cutter at a position where the length of the squat line is sufficiently secured. When the sewing machine having the lower thread supply device having the above-described structure is used, the user first removes the cover 18 of the sewing table 12, and inserts the lower thread reel into the housing portion 2A of the inner pot 20 to be installed. Then, the lower thread is pulled out from the lower thread reel 21, and the slit 2 3 b of the linear adjustment plate 2 3 is first hung. Next, the lower thread is rotated clockwise in the state of the slit 23b, and the lower thread is induced to the direction of the induction slit 27 of the needle plate 16. The line is induced in the direction of the inducing slit 27, and is hung in the slit 2 3 b; the line is lowered along the slit 23b to induce the hole 23a. The lower thread is induced to the hole 23a, and the lower thread is brought into a state in which the tension is applied by the wire adjusting plate 23 and the wire adjusting spring 24. The user 拉 is pulled out along the slit 27 while giving the appropriate tension to the lower thread. At the end portion of the induction slit 27, the lower line is induced toward the bottomed groove 2 of the needle plate 16 so that the lower line is induced from the end portion of the induction slit 27 along the bottomed groove 28a formed by the outer edge of the needle plate 16. To the cutting edge 28b. At the time of the blade cutting portion (four), the lower thread is cut by the cutting edge 28b. The line enters and cuts. In this state, the user moves the needle bar π up and down by a drive mechanism (not shown). By moving up and down, the outer tank 29 of the horizontal tank 3 is horizontally rotated, and the upper thread is caught by the front end and wound with the lower thread, and is pulled out from the pinhole 16& of the needle plate 16 to the upper side. In this state, since the lower line is taken from the wire adjustment plate 23 of the inner kettle 20

2272-9469-PF 11 200928037 Pulling out through the pinhole 16a through the groove portion 23c, the user does not have to be instructed to induce the lower thread to the groove portion 23c. Will pull out " to complete the preparation for sewing. The % upper thread and the lower thread are disassembled. In the present embodiment, the length of the drawn lower thread can be set to a predetermined length. Therefore, the lower thread is pulled out from the lower thread reel 21: In the case, the lower end of the outer IW is pulled out by the long line Ο ❹ (3). In the case of too short, the front end of the outer dad 29 catches the lower thread injury, and the user can Strictly perform the sewing accident. According to the present embodiment, the lower thread drawn from the lower thread reel 21 is moved by the induction slit 27 in the clockwise direction H p L in the state where the inner surface is hung on the narrow slit 23b. The lower thread is induced: the wire adjusting plate 23 passes between the n field + τ / the ear 4 of the wire adjusting spring 24 and passes through the tension generating portion 22. Therefore, it is not necessary to individually set, for example, a bow-shaped guide to set the lower thread, and it is possible to surely set the positive heart line. Since the inducing slit 27 is slightly scalloped, the processing is also the most expensive. 16 degrees - into. Therefore, in the embodiment of the present invention, since the tangential portion 28 is provided on the needle plate 16, the length of the 1st pull-out length pulled out from the lower thread reel 21 is not generated: =^ 纟 纟 does not deviate from the object of the present invention In the case of various changes, the details of the configuration of the tension generating unit 22 and the change of the mounting position of the line adjusting plate 23 can be performed, for example. Shovel

2272-9469-PF 12 200928037 [Simple description of the drawing] Fig. 3 is a plan view of the needle plate of the Zf: state. Floor plan.贫 贫 垔 的 的 的 下 下 供给 供给

Fig. 4 is a front elevational view of the perspective adjustment plate of the internal structure of the embodiment of the present invention, which is a schematic diagram of the main component symbol 11 to the sewing machine frame 16 to the needle plate. 17] the lower thread reel housing opening 20 to the inner cylinder 21 to the lower thread winding 22 to the tension generating portion 23 to the line adjusting plate 24 to the line adjusting spring 27 to the inducing slit 2 8 to the tangential portion 29 to the outer kettle 3 0 ~Horizontal dad

2272-9469-PF 13

Claims (1)

200928037 X. Patent application scope: ❹ J — The lower thread supply device of the sewing machine is detachably accommodated in the inner dad of the frame of the seam rushing machine through the lower thread reel storage port::, line status: and line The state plate spring is mounted along the inner circumference of the inner sign in a state of ": and is provided with a tension generation #, and is applied to the lower thread which is led out between the linear state plate springs through the linear shape. The impedance has a needle plate disposed above the inner portion* and having an opening σ portion of the lower thread reel. The needle plate has an inducing slit. The inducing slit is in the line state plate and the line state plate bomb. The part of the Bossa heavy mouth is slightly linear in the direction of extension. 2 ^ The lower thread supply 缝 of the sewing machine according to the first aspect of the invention, wherein the needle plate has a tangential portion, and is cut off from a length ratio of the lower winding, 4 to a long position of the end of the induction slit. Offline. Established domain 2272-9469-PF 14