WO2017138163A1 - ミシンの糸通し装置 - Google Patents
ミシンの糸通し装置 Download PDFInfo
- Publication number
- WO2017138163A1 WO2017138163A1 PCT/JP2016/069416 JP2016069416W WO2017138163A1 WO 2017138163 A1 WO2017138163 A1 WO 2017138163A1 JP 2016069416 W JP2016069416 W JP 2016069416W WO 2017138163 A1 WO2017138163 A1 WO 2017138163A1
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- WO
- WIPO (PCT)
- Prior art keywords
- needle
- thread
- looper
- threading
- hole
- Prior art date
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Classifications
-
- D—TEXTILES; PAPER
- D05—SEWING; EMBROIDERING; TUFTING
- D05B—SEWING
- D05B87/00—Needle- or looper- threading devices
-
- D—TEXTILES; PAPER
- D05—SEWING; EMBROIDERING; TUFTING
- D05B—SEWING
- D05B63/00—Devices associated with the loop-taker thread, e.g. for tensioning
-
- D—TEXTILES; PAPER
- D05—SEWING; EMBROIDERING; TUFTING
- D05D—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES D05B AND D05C, RELATING TO SEWING, EMBROIDERING AND TUFTING
- D05D2207/00—Use of special elements
- D05D2207/02—Pneumatic or hydraulic devices
- D05D2207/04—Suction or blowing devices
Definitions
- the present invention relates to a needle threading device for a sewing machine, and in particular, a sewing machine for passing a needle thread by using gas conveyance to a sewing needle such as a lockstitch sewing machine, an edge stitch sewing machine, a double chain stitch sewing machine, or a flat stitch sewing machine.
- a sewing needle such as a lockstitch sewing machine, an edge stitch sewing machine, a double chain stitch sewing machine, or a flat stitch sewing machine.
- the present invention relates to a pneumatic needle threading device.
- the pneumatic needle threading device that uses gas conveyance in the intake mode as disclosed in Patent Documents 1-6 compared with the pneumatic needle threading device that uses gas conveyance in the exhaust mode, the needle thread in the thread hole of the sewing needle. There is a possibility that the needle threading can be executed relatively stably.
- the peripheral portion that actually surrounds the thread hole of the sewing needle to be sucked in the needle threader Is not in close contact with the periphery of the thread hole of the sewing needle to be aspirated.
- the needle threader is not only the thread hole of the sewing needle that should be inhaled originally, but also the peripheral portion surrounding the thread hole of the sewing needle that should be sucked in the needle threader and the sewing needle that is to be sucked in.
- the air is also sucked in from the interface in which the tight bonding between the thread holes is incomplete. For this reason, the intake air amount of a pump driven by a general-purpose sewing machine motor cannot provide an intake power sufficient to thread the needle thread from the thread hole of the sewing needle that should be sucked.
- the present invention has been made to solve these problems, and gas transport is used for a sewing needle such as a lockstitch sewing machine, an edge stitch machine, a double chain stitch machine, a flat stitch machine, etc. It is an object of the present invention to provide a pneumatic needle threading device for a sewing machine that allows a needle thread to pass through in the form of air sucked from only a thread hole.
- the present invention uses gas conveyance to the sewing needle, sucks air only from the thread hole of the sewing needle, reduces fluid resistance, and gives sufficient intake power with the intake amount of a pump driven by a general-purpose pump motor. It is an object of the present invention to provide a pneumatic needle threading device for a sewing machine for passing a needle thread in an intake configuration.
- the present invention provides a looper for a sewing machine looper that utilizes gas conveyance together with pneumatic needle threading of the sewing machine for passing the needle thread in an intake mode that uses air conveyance to the sewing machine needle and sucks air from only the thread hole of the sewing needle.
- An object of the present invention is to provide a pneumatic looper threading device for a sewing machine for exhausting to a hole and passing a looper thread in an exhaust form.
- the present invention uses only one pump driven by a sewing machine motor to use the intake and exhaust air for gas conveyance, and performs pneumatic needle threading in the form of intake air from the thread hole of the sewing needle, and into the looper hole of the sewing machine looper.
- An object of the present invention is to provide a pneumatic threading device for a sewing machine that performs pneumatic looper threading through a looper hole of a sewing machine looper in an exhaust form.
- a threading device for a sewing machine forms a stitch by twisting a needle of a sewing machine and a needle thread that is threaded through a thread hole of the needle in cooperation with the needle.
- a pneumatic threading device for a sewing machine having a stitch forming device including a loop catching device and pneumatically threading a needle thread hole, a peripheral belt ring shape surrounding a thread outlet of the needle thread hole
- a hermetic lip that has a corresponding peripheral band ring-shaped brace that surrounds the inlet hole that can be hermetically abutted on the region and that sucks in from the thread outlet of the needle thread hole, and a needle thread that is connected to the inlet hole of the hermetic lip
- the suction lip and the hermetic lip during needle threading are moved to the threading position so that the inlet hole is aligned with the thread outlet of the thread hole of the needle and is in contact with the needle.
- a pneumatic threading device for a sewing machine comprising: a pump that is sucked into a suction port via a suction conduit and threaded through a thread hole of the needle.
- the needle has a loop for passing the sword tip of the loop catcher at the top of the thread hole, and the peripheral band ring-shaped area of the needle is an upper flat band area portion extending in the horizontal direction across the middle part of the thread, and the thread hole
- a lower semicircular band region portion extending horizontally across the lower portion of the upper flat band region portion and a lower semicircular band region portion, and two side portions extending in the vertical direction and the circumferential direction.
- a peripheral band ring-shaped brace of the hermetic lip corresponding to the band region portion, and an upper flat band segment extending in the horizontal direction, a lower semicircular band segment extending in the horizontal direction, and an upper flat shape.
- Two side band segments extending vertically and circumferentially connecting the band segment and the lower semicircular band segment.
- the hermetic lip is formed of one material selected from flexible rubber, plastic, and cork.
- the hermetic lip is formed of one material selected from rubber, plastic, and cork that are elastic to the extent that flexibility is not impaired.
- the thread stop wall where the needle thread sucked and conveyed from the needle thread suction conduit collides between the needle thread suction conduit and the pump, and the flow velocity of the air colliding with the thread stop wall is the pump.
- the separator has a space that prevents the needle thread that has been threaded and collided with the thread stop wall from being sucked toward the pump and sucked toward the pump.
- the position switching mechanism forms a preparation position that is in a preparation state for needle threading by a primary manual operation, and is moved together with an operation unit that holds the preparation position, and the operation unit. And a needle threading positioning portion that forms a needle threading position in which the needle threading state is reached at a predetermined needle threading timing according to the secondary manual operation.
- the operation unit includes a manually operated manual lever and a transmission member connected to the manual lever and holding a preparation position by a hook. It is movable through the member, is repelled by a spring, and forms a needle threading position where the needle threading state is reached at a predetermined needle threading timing according to the secondary manual operation, and a hermetic lip is attached And a control member for moving the hermetic lip so that the air inlet hole is aligned with the thread outlet of the thread hole of the needle and contacting the needle.
- the needle threading positioning portion is formed on a control pin, a control plate that regulates the movement of the control pin, and a disk that penetrates the control plate and is driven synchronously with the needle and has a notch.
- the control plate When abutting and engaging with the notch according to the secondary manual operation, the control plate is swung by axial displacement and the hermetic lip is aligned with the thread outlet of the thread hole of the needle by the control member. And a positioning pin that moves to contact the needle.
- the needle is composed of a plurality of needles, the plurality of needles are divided into at least two groups, and each needle of the two groups is selected and connected to the suction port of the pump. It has a road selection device.
- a stitch that forms a stitch by twisting the needle thread and the looper thread that are threaded through the thread hole of the needle and the looper hole of the looper in cooperation with the looper as a loop capturing device.
- a looper yarn introduction inlet to which a discharge port of the pump is connected and a looper yarn introduction inlet connected to the looper yarn introduction inlet, and one end of the looper yarn inserted into the looper yarn introduction inlet is air-fed by air fed from the discharge port The looper thread guide conduit to be conveyed, the looper thread connection conduit that is telescopically fitted to the looper thread guide conduit and abuts against the looper hole inlet of the looper when threading the looper thread, and the looper thread connection conduit when the looper thread is threaded.
- One end of the looper yarn that is brought into contact with the looper hole inlet and inserted into the looper yarn introduction inlet is routed from the looper yarn introduction inlet via the looper yarn guide conduit and the looper yarn connection conduit. It performs looper thread through the looper hole of the looper, and a conduit connecting mechanism to separate the looper thread connecting conduit during the stitch formation from the looper hole entry looper.
- the conduit connection mechanism is attached to the sewing machine bed, forms a preparation position that is ready for looper threading by a primary manual operation, and an operation unit that holds the preparation position, and a preparation position
- a looper threading positioning portion for forming a looper threading position in which the looper threading state of the looper threading is reached at a predetermined looper threading timing in accordance with the secondary manual operation.
- the looper threading positioning portion is driven in synchronization with the looper, abuts against a disk having a notch, and is axially engaged with the notch according to the secondary manual operation. It has a positioning pin that moves to move the control plate to align and abut the looper thread connecting conduit with the looper hole inlet of the looper.
- the needle thread suction conduit is connected to the suction port and the looper thread connection conduit is connected between the suction port and the discharge port of the pump, respectively.
- a flow path switching device for switching by communicating with the atmosphere port, and switching the discharge port to the looper thread connecting conduit and the suction port to the atmosphere port during looper threading.
- the flow path switching device is linked with the primary manual operation, and one of the suction port and the discharge port is connected to one of the needle thread suction conduit and the looper thread connection conduit, and the suction port and the discharge port.
- a flow path switching valve that switches the other of the suction port and the discharge port to the other of the needle thread suction conduit and the looper thread connection conduit, and one of the suction port and the discharge port to the atmosphere port.
- the sewing machine includes a sewing needle and a loop catching device that cooperates with the needle and loops the needle thread threaded through the thread hole of the needle to form a lock stitch.
- a pneumatic threading device for sewing machines that has a stitch forming device and pneumatically threaded through the needle thread hole, it can be brought into hermetic contact with the semicircular surface edge of the needle including the thread outlet of the needle thread hole.
- a position switching mechanism that abuts the needle so that the air inlet hole is aligned with the thread outlet of the thread hole of the needle, moves the hermetic lip backward from the needle and moves it to the standby position at the time of stitch formation, and a needle thread suction conduit It is connected to the suction port and the needle thread hole A loop that has one end of the needle thread inserted into the inlet, sucked into the suction port from the thread outlet of the needle thread hole through the suction hole through the suction hole, and threaded through the needle thread hole
- a catching device it has a seam forming device that cooperates with the looper to tie the needle thread and looper thread threaded through the thread hole of the needle and the looper hole of the looper to form a chain stitch,
- One end of the looper thread to be inserted into the thread introduction inlet is passed through the looper thread guide conduit from the looper thread introduction inlet to the looper hole of the looper through the looper thread connection conduit.
- a conduit connecting mechanism for separating the looper from the looper hole inlet of the looper.
- the intake air that sucks in only from the thread hole of the sewing needle by using gas conveyance to the sewing needle such as the lockstitch sewing machine, the edge stitch sewing machine, the double chain stitch sewing machine, and the flat stitch sewing machine.
- the needle thread can be threaded pneumatically in the form.
- the suction of a pump driven by a general-purpose sewing machine motor is made by using gas conveyance to the sewing needle and sucking air only from the thread hole of the sewing needle, reducing the fluid resistance.
- the needle thread can be threaded pneumatically in an intake configuration that can provide sufficient intake power in an amount.
- the gas conveying is performed together with the pneumatic needle threading of the sewing machine for allowing the needle thread to pass through the suction mode in which the air is sucked only from the thread hole of the sewing needle by using the gas conveying to the sewing needle.
- the threading device of the sewing machine of the present invention only one pump driven by the sewing machine motor uses the intake and exhaust for gas conveyance, and the pneumatic needle threading in the form of suction from the thread hole of the sewing needle. And the pneumatic looper threading in the exhaust mode into the looper hole of the sewing machine looper.
- FIG. 2 is a block diagram of a 5-needle 8-thread double ring (flat stitching) / edge overlock (overlock) sewing machine including a needle threading device for a sewing machine according to the present invention.
- It is a partial expansion perspective view of the needle threading device of the sewing machine by this invention. It is the expansion perspective view which looked at the needle in the needle threading device of the sewing machine by the present invention in the direction opposite to the sewing direction. It is the perspective view which looked at the needle in the needle threading device of the sewing machine by this invention in the sewing direction.
- FIG. 3 is a partially broken perspective view of a needle and a hermetic lip in a needle threading device for a sewing machine according to the present invention. It is the front view which looked at the needle and the hermetic lip in the state of needle threading in which the hermetic lip is in contact with the needle. It is AA arrow sectional drawing in Fig.5 (a). It is BB arrow sectional drawing in Fig.5 (a). It is CC sectional view taken on the line in Fig.5 (a). It is a partial expansion perspective view which shows the position switching mechanism in the needle threading device of the sewing machine by this invention.
- FIG. 1 It is a partial expansion perspective view which shows the position switching mechanism in the needle threading device of the sewing machine by this invention. It is a partial expansion perspective view showing a position change mechanism including a looper threading positioning part in a needle threading device of a sewing machine by the present invention. It is an external view of the separator in the needle threading device of the sewing machine by this invention. It is AA arrow sectional drawing in Fig.9 (a).
- (A) is an exploded perspective view of the flow path selection device in the needle threading device of the sewing machine according to the present invention, and (B) is a perspective view of the selection valve of the flow path selection device. It is a longitudinal cross-sectional view of the flow-path selection apparatus in the needle threading device of the sewing machine by this invention.
- the double ring (flat sewing) / edge (overlock) sewing machine is composed of a bed, a post and an arm, and the lower shaft LS and the upper shaft US as the drive shaft are parallel to each other in the horizontal direction. It extends to.
- the lower shaft LS is rotationally driven by the sewing machine motor M1.
- the upper shaft US is rotationally driven in synchronization with the lower shaft LS by the lower shaft pulley LP, the timing belt TV, and the upper shaft pulley UP.
- the rotation ratio of the lower shaft LS and the upper shaft US is 1: 1.
- a hand pulley HP that can be manually rotated when the sewing machine motor M1 is stopped is connected to the lower shaft LS.
- the head and bed of the arm are provided with thread holes 1c, 1d of the edge overhanging needle 1 (1a, 1b), double ring needles.
- a stitch forming device 4 for forming stitches by twisting the needle threads 3a, 3b, 3c, 3d, 3e and the looper threads 3f, 3g, 3h.
- the stitch forming device 4 has a needle bar / presser bar unit base 12a having a needle bar 10 and a presser bar 11, and the needle bar 10 is driven from the upper shaft US by a needle bar drive mechanism 12c so as to be raised and lowered.
- the edge needle 1 (1a, 1b) and the double ring needle 1 (1e, 1f, 1g) are fixed to the needle bar 10 by a needle clamp 12b.
- the stitch forming device 4 holds the cloth WP to be sewn at the time of sewing between the needle plate 13 and the presser foot 14 pressed by the presser bar 11 and advances the feed mechanism 15 step by step. including.
- the feed mechanism 15 is driven by the lower shaft LS together with the looper drive mechanism of the looper 2 (2a, 2b, 2c).
- the edge-locking needle 1 (up-and-down moving through the needle plate 13) ( An arc-shaped trajectory is drawn so as to intersect with the trajectory of the needle thread 3a, 3b inserted into the thread hole 1c, 1d of 1a, 1b) and the edge needle 1 (1a, 1b) below the needle plate 13.
- Overlock stitching) and double ring needle (1e, 1f, 1g) are threaded through the thread holes 1h, 1i, 1j and elliptical arcs so as to intersect the trajectory of the double ring needle 1 (1e, 1f, 1g).
- a double ring (flat stitch) is formed on the cloth WP to be sewn by crossing the double ring looper thread 3h inserted through the looper hole 2f of the double ring looper 2c that reciprocates along a locus.
- the double ring (flat stitching) / edge-locking (overlock) sewing machine has edge-locking needles 1 (1a, 1b) and two The multi-ring needle 1 (1e, 1f, 1g) and the needle threads 3a, 3b, 3c, 3d, 3e that cooperate with these needles and are threaded through the thread holes 1c, 1d, 1h, 1i, 1j of the needles And a loop forming device 4 including a looper 2 (2a, 2b, 2c), which is a loop catching device for forming a stitch by twisting the looper yarns 3f, 3g, 3h.
- a double ring (flat stitching) and an edge overhang ( The overlock) sewing machine includes a pneumatic threading device 20 for pneumatically threading the needle thread holes 1c, 1d, 1h, 1i, and 1j.
- the pneumatic threading device 20 includes thread outlets 5 (5a, 1b) of the thread holes 1c, 1d, 1h, 1i, and 1j of the edge needle 1 (1a, 1b) and the double ring needle 1 (1e, 1f, 1g). 5b, 5c, 5d, 5e) The thread of the edge needle 1 (1a, 1b) and the double ring needle 1 (1e, 1f, 1g) that can be brought into hermetic contact with the peripheral belt ring-shaped region 22 surrounding the needle Corresponding peripheral band surrounding the inlet hole 6 (6a, 6b, 6c, 6d, 6e) for sucking from the yarn outlet 5 (5a, 5b, 5c, 5d, 5e) of the holes 1c, 1d, 1h, 1i, 1j A hermetic lip 7 (7a, 7b, 7c, 7d, 7e) having a ring-shaped pad 24 is provided.
- the needle stems ST of the edge needle 1 (1a, 1b) and the double ring needle 1 (1e, 1f, 1g) are loopers 2 which are loop catching devices above the thread holes 1c, 1d, 1h, 1i, 1j, respectively.
- (2a, 2b, 2c) has an edge 1k (FIG. 4 (a), FIG. 4 (d)) for passing.
- the peripheral band ring-shaped region 22 of the edge needle 1 (1a, 1b) and the double ring needle 1 (1e, 1f, 1g) is shown in FIG. 4 (a), FIG. 4 (d), FIG. a)-as shown in FIG.
- an upper flat band region portion 9a extending in the horizontal direction across the substantially intermediate portion of the punch 1k, and each thread hole 1c, 1d, 1h, 1i, 1j in the needle stem ST
- the lower semicircular band region portion 9b extending in the horizontal direction across the lower portion of the upper flat band region portion 9a and the lower semicircular band region portion 9b is connected in the vertical direction and in the circumferential direction.
- Two side band region portions 9c and 9d Two side band region portions 9c and 9d.
- the peripheral band ring-shaped patch 24 of the hermetic lip 7 (7a, 7b, 7c, 7d, 7e) is shown in FIGS. 4 (c), 4 (d), 5 (a) -5.
- the upper flat band segment 9e extending in the horizontal direction
- the lower semicircular band segment 9f extending in the horizontal direction
- Two side band segments 9g and 9h extending in the vertical direction and in the circumferential direction.
- the peripheral belt ring-shaped region 22 and the peripheral The upper convex semicircular peripheral edge segment 9a of the peripheral band ring-shaped region 22 is formed into an upper flat band segment 9e extending in the horizontal direction, and the peripheral band ring-shaped region 22 and the peripheral band ring shape.
- the lower convex semicircular peripheral segment 9b of the peripheral band ring-shaped region 22 is formed in the lower part of the peripheral band ring-shaped region 22 at the lower part of the peripheral band ring-shaped region 24.
- the two side band region portions 9c and 9d of the peripheral band ring brace 22 are the two side band segments 9g and Closely each in h. Therefore, when the hermetic lip 7 (7a, 7b, 7c, 7d, 7e) comes into contact with the edge needle 1 (1a, 1b) and the double ring needle 1 (1e, 1f, 1g), the edge needle 1 (1a 1b) and the peripheral band ring-shaped region 22 of the double ring needle 1 (1e, 1f, 1g) are in close contact with the peripheral band ring-shaped patch 24 of the hermetic lip 7 (7a, 7b, 7c, 7d, 7e). Therefore, when the needle thread is threaded with air pressure, it is possible to inhale only from the thread hole of the sewing needle, so that the needle thread can be threaded stably and reliably.
- hermetic lips 7 In each of the hermetic lips 7 (7a, 7b, 7c, 7d, 7e), the edge needle 1 (1a, 1b) and the double ring needle 1 (1e, 1f, 1g) are hermetic lips 7 (7a, 7b, 7c, 7d, and 7e) are spread out and project outwardly in a flared shape to assist with easy insertion into 7c, 7d, and 7e).
- the intake port 6 (6 a, 6 b, 6 c) of the hermetic lip 7 (7 a, 7 b, 7 c, 7 d, 7 e) 6d, 6e) are connected to the pump PU described later via individual needle thread suction conduits 40a-40e and grouped needle thread suction conduits 41a-41b.
- the pneumatic threading device 20 allows the hermetic lip 7 (7a, 7b, 7c, 7d, 7e) to pass through the intake hole 6 (6a, 6b, 6c, 6d) during needle threading.
- 6e) are thread exits 5 (5a, 5b) of the thread holes 1c, 1d, 1h, 1i, 1j of the edge needle 1 (1a, 1b) and the double ring needle 1 (1e, 1f, 1g), respectively.
- 5c, 5d, 5e) are moved to the threading position by contacting the edge needle 1 (1a, 1b) and the double ring needle 1 (1e, 1f, 1g) so as to be aligned with the stitches.
- the pneumatic threading device 20 is connected to the suction port 28a via individual needle thread suction conduits 40a-40e and grouped needle thread suction conduits 41a-41b, and the needle 1 (1a, 1b) during needle threading. And one end of each of the needle threads 3a, 3b, 3c, 3d, and 3e inserted into the thread inlets 5f of the thread holes 1c, 1d, 1h, 1i, and 1j of the double ring needle 1 (1e, 1f, and 1g) 1 (1a, 1b) and double ring needles 1 (1e, 1f, 1g) through the respective thread outlets 5 through individual inlet threads 6 (6a, 6b, 6c, 6d, 6e)
- the thread holes of the needle 1 (1a, 1b) and the double ring needle 1 (1e, 1f, 1g) are sucked into the suction port 28a via the suction conduits 40a-40e and the grouped needle thread suction conduits 41a-41b. 1p, 1d, 1
- the position switching mechanism 26 is attached to the sewing machine head, and forms a preparation position where the needle threading is ready by primary manual operation.
- the operation unit 30 that holds the preparation position and the manual rotation operation of the hand pulley HP (FIGS. 1 and 2) that is moved together with the operation unit 30 and fixed to the lower shaft LS that is the drive shaft from the preparation position, that is, the secondary A needle threading positioning portion 32 that forms a needle threading position in which a needle threading state is established at a predetermined needle threading timing according to a manual operation.
- the operation unit 30 is connected to the manually operated manual lever 69 and the manual lever 69, and the preparation position is held by the stopper 80 and the hook portion 74d of the needle threading positioning unit 32.
- a transmission unit 38 for transmitting The needle threading positioning unit 32 is moved via the transmission unit 38, is repelled by the lip drive spring 86, and is needle threaded at the needle threading timing that is predetermined according to the secondary manual operation of the hand pulley HP.
- a needle threading position is formed in a threaded state, and the attached hermetic lip 7 (7a, 7b, 7c, 7d, 7e) is inserted into the needle hole 6 (6a, 6b, 6c, 6d, 6e).
- 1c, 1d, 1h, 1i, 1j has a control unit 90 that moves so as to be aligned with the yarn outlet 5 (5a, 5b, 5c, 5d, 5e) and makes contact with the needle.
- the needle threading positioning portion 32 passes through the control pin 45 and the control plate 50 that regulates the movement of the control pin 45, and is driven synchronously with the needle to have a notch 42b. Abutting on the disk 42, when the hand pulley HP is fitted into the notch 42b in response to a manual rotation operation of the hand pulley HP, that is, displaced in the axial direction, the control plate 50 is swung, and the hermetic lip 7 is moved by the control unit 90.
- the needle bar / A threading set lever shaft 72 is mounted in the threading set lever shaft mounting hole 71b of the threading set lever plate 71 fixed to the presser bar unit base 12a by screws 79a, 79b and a pipe 79c.
- the threading set lever shaft sliding hole 74b is fitted with the threading set lever shaft 72 and slides.
- a manual operation lever 69 for primary manual operation is attached to the attachment portion 74c of the transmission portion 38 with a set screw 76 through the slit 71j of the threading set lever plate 71 through the threading set lever arm cover 75 from the long groove 69c. It is done.
- the manual operation lever 69 slides on the manual lever sliding surface 71c.
- the transmission unit 38 and the control unit 90 are configured such that one of the lip drive springs 86 is attached to the spring mounting arm 74a by the spacer 87 and the screw 88, and the other is connected by the spacer 89a and the screw 89b by the contact portion 74e and the contact portion 90b. ing.
- a stopper 80 is provided on the threading set lever plate 71 by a stopper shaft 83, a washer 85, and a set screw 84 to be ejected clockwise by a stopper spring 83.
- a stopper release shaft 81 is provided on the stopper 80 so as to be exposed from the stopper release shaft escape hole 71 d of the threading set lever plate 71.
- the manual operation lever 69 is provided with a lower inclined cam 69a on which the stopper release shaft 81 slides, an upper inclined cam 69b, and a linear cam 69e that connects both the cams.
- the stopper 80 is springed clockwise by the stopper spring 83, and the stopper release shaft 81 is positioned below the lower inclined cam 69a in the manual operation lever 69.
- the stopper release shaft 81 slides the linear cam 69e from the lower inclined cam 69a and stops the stopper 80. Is rotated counterclockwise, the upper inclined cam 69b is further slid to stop the stopper 80 clockwise, and the hook portion 74d of the transmission portion 38 is locked to the hook portion 80a of the stopper 80.
- This state is the above-mentioned preparation position in the hermetic lip 7 (7a, 7b, 7c, 7d, 7e).
- the lip drive spring 86 is suspended between the mounting hole 74c of the transmission unit 38 and the spacer 87 of the screw 88, and the mounting hole 90f of the control unit 90, the screw 86a, and the spacer 86b.
- the lip driving arm 100 is pivotally attached to the control unit 90 by a pin 98 that passes through the swinging hole 100a and is fixed to the mounting hole 90d.
- the lip driving guide shaft mounting hole 90a of the control unit 90 has a lip guide plate mounting surface.
- a lip drive guide shaft 93 attached to the lip drive guide shaft mounting holes 91f and 91g of the lip guide plate 91 attached to 71a is pivotally supported.
- the lip driving arm 100 is slidably fitted to the cam 91a of the lip guide plate 91 by a positioning pin 99 pivotally attached to the pin hole 100b.
- the deformation cam 91b following the cam 91a in which the lip driving arm 100 slides by the positioning pin 99 has to be arranged adjacent to the left side in the lateral direction of the presser bar 11 of the stitch forming device 4. Therefore, when the manual operation lever 69 is lowered as the primary manual operation, the lip driving arm 100 is moved to the right in the lateral direction, and the hermetic lip 7 (7a, 7b, 7c, 7d, 7e) is moved to the intake port hole during needle threading.
- the lip driving arm 100 is connected to the hermetic lip 7 (7a, 7b, 7c, 7d, 7e) via the lip guide arm 103, the lip holder shaft 117, and the lip holder 110.
- a support 77 rotatably supported by a threading set lever arm cover 75 with a receiving set screw 78 is fitted into a threading lever connecting groove 52b of the inclined cam operating arm plate 52 in the needle threading positioning portion 32.
- the front end of the receiving screw 78 is fitted into the long groove 69d of the manual operation lever 69 to be escaped.
- the inclined cam actuating arm plate 52 is elastically moved upward by a lip return spring 89 hung on a spring hook 71e of the threading set lever plate 71, a mounting hole 52c of the inclined cam operating arm plate 52, a screw 89a, and a spacer 89b. Then, it is rotated clockwise by the lowering operation of the manual operation lever 69.
- the inclined cam actuating arm plate 52 has a flow path switching valve 53 (FIGS. 8, 12A, 12B, and 13) of a flow path switching device 150 that has an intake / exhaust release shaft pin 54 extending in the horizontal direction. ) Is fixed by a screw 56 through the intake / exhaust release shaft coupling hole 55b and the cam body mounting hole 52a of the inclined cam body 55.
- the lip drive pin 96 provided in the control unit 90 is fitted in the lip drive pin connecting groove 50b of the control plate 50 in the needle threading positioning unit 32.
- the flow path switching valve 53 is connected to the intake / exhaust release shaft through hole 60a of the flow path control body 60 through the valve through hole 44b of the flow path control body 44, the valve through hole 50a of the control plate 50, and the needle threading attachment plate 41. Is done.
- the control pin 45 having the preparation position large-diameter portion 45b and the threading position small-diameter portion 45c has, on the one hand, the tip of the cam follower connection shaft 46 connected to the inclined cam 55a of the inclined cam body 55 via the operating spring 47.
- the pin end 45a has a control pin through hole 44a of the flow path control body 44, a pin insertion large diameter hole 50c of the control plate 50, a spring 49, a needle threading attachment plate 41, and a control pin through hole 60b of the flow path control body 60. And abuts against the end face 42a of the disk 42 that has a notch 42b and rotates synchronously with the lower shaft LS as a drive shaft.
- the actuating spring 47 is interposed between the accommodation hole 45e of the control pin 45 and one end of the cam follower connection shaft 46 that is secured by the pin 48 fitted in the elongated hole 45d.
- the pump PU is of a reciprocating type in the illustrated embodiment, and is driven by a pump motor M2, and includes a suction port 28a and a suction valve 135a, and a discharge port 28b and a discharge valve 135b.
- the pump motor M2 rotates the eccentric cam 135c via the belt V and the pulley PP, and reciprocates the piston 135f of the pump PU by a reciprocating linear motion in which this rotational motion is converted via the drive lot 135d and the swing link 135e.
- the pump PU may be a rotary type.
- the hermetic lip 7 (7a, 7b, 7c, 7d, 7e) is formed of one material selected from flexible rubber, plastic, and cork. Further, in the threading device of the sewing machine, the hermetic lip 7 (7a, 7b, 7c, 7d, 7e) is selected from rubber, plastic, and cork that have flexibility or elasticity that does not impair flexibility. It is made of one material. In general, there may be a situation where needles having different thicknesses are exchanged depending on the properties and thickness of the yarn and / or the properties and thickness of the fabric. On the other hand, the distance t (FIG.
- the hermetic lip 7 (7a, 7b, 7c, 7d, 7e) is one material selected from flexible rubber, plastic, cork, or elastic rubber, plastic, Since it is made of one material selected from cork, the peripheral band ring of the edge needle 1 (1a, 1b) and the double ring needle 1 (1e, 1f, 1g) when replaced with a needle of a different thickness Adhesiveness between the ring-shaped region 22 and the peripheral band ring-shaped patch 24 of the hermetic lip 7 (7a, 7b, 7c, 7d, 7e) can be ensured.
- a separator body 115 is inserted into the lip holder 110 and attached with screws 115a.
- the needle thread 3a (3b, 3c, 3d, 3e) that has been sucked and conveyed from the needle thread suction conduit 40a-40e between the needle thread suction conduit 40a-40e and the pump PU.
- the thread stop wall 116 that collides, and the needle thread 3a that is threaded and collided with the thread stop wall 116 at a lower speed than the flow rate of air that has collided with the thread stop wall 116 and sucked and conveyed toward the pump PU.
- a separator 120 having a space 115g for preventing (3b, 3c, 3d, 3e) from being sucked toward the pump PU.
- the space 115h communicates with the flow paths 115i and 115j and is connected to the suction port 28a of the pump PU.
- the needle thread 3a (3b, 3c, 3d, 3e) having a large inertia force that has been sucked and conveyed has a lower flow velocity of the air that collides with the thread stop wall 116 than the flow velocity that is sucked and conveyed toward the pump PU. In other words, it collides with the thread stop wall 116 of the separation space 115g and is left behind by being threaded, where the needle thread and air are separated.
- the hermetic lips 7 (7a, 7b, 7c, 7d, 7e) are separated so that one is provided for each edge needle 1 (1a, 1b) and double ring needle 1 (1e, 1f, 1g). 120 is also provided for each edge needle 1 (1a, 1b) and double ring needle 1 (1e, 1f, 1g).
- the needle is a plurality of edge needles 1 (1a, 1b) and double rings.
- the needle 1 (1e, 1f, 1g) is composed of at least two groups, in other words, the edge needle 1 (1a, 1b) and the double in order to reduce the size and capacity of the pump PU.
- the ring needles 1 (1e, 1f, 1g) are divided into the ring needles 1 (1e, 1f, 1g), and the two edge needles 1 (1a, 1b) or the double ring needles 1 (1e, 1f, 1g) are connected to the suction port 28a of the pump PU It has a flow path selection device 33 for selecting and connecting.
- a flow path control body 44 of the flow path selection device 33 includes a flow path selection pipe 64 that extends in the vertical direction and has an intake outlet hole 64a, and an intermediate portion thereof has an edge intake needle intake inlet hole 64b and A double ring needle intake inlet hole 64c is provided, and their angles are 90 ° out of phase.
- the flow path control body 44 has an intake outlet hole 43a, an edge intake needle inlet hole 43b, and a double ring needle intake inlet hole 43c.
- the intake outlet hole 43a is connected to the pump PU.
- the edge-inlet intake inlet hole 64b and the double-ring-needle intake inlet hole 64c are connected to the edge-intake intake inlet hole 43b and the double-ring needle intake inlet hole 43c, respectively.
- the flow path selection device 33 flows to any one of the edge intake needle inlet hole 64b, the edge intake needle intake hole 43b, the double ring needle intake inlet hole 64c, and the double ring needle intake inlet hole 43c.
- a flow path selection lever 132 for selecting a path is pivotally supported by the pivot 131a of the flow path selection lever base 131 between the two stoppers 131b, and flows from the flow path selection arm 132a of the flow path selection lever 132 through the flow path selection link 61.
- the sewing machine cooperates with the looper 2 (2a, 2b, 2c) as a loop catching device, and the needle thread holes 1c, 1d, 1h, 1i, 1j.
- a stitch forming device 4 for forming stitches by twisting the needle threads 3a, 3b, 3c, 3d and 3e and the looper threads 3f, 3g and 3h threaded through the looper holes 2d, 2e and 2f of the looper, respectively.
- the threading device 20 of the sewing machine is connected to the looper yarn introduction inlet 35 to which the pump discharge port 28b is connected, and to the looper yarn introduction inlet.
- One end of each of the looper yarns 3f, 3g, and 3h inserted into the inlet 35 is fitted into the looper yarn guide conduit 37 and the looper yarn guide conduit 37 that are air-fitted by air pressure-fed from the discharge port 28b.
- the looper thread connection conduit 39 that abuts the looper hole inlets 2g, 2h, and 2i of the looper 2 (2a, 2b, and 2c) during threading, and the looper thread connection conduit 39 during looper threading to the looper hole inlets 2g, 2h, and 2i of the looper.
- One end of the looper yarns 3f, 3g, and 3h inserted into the looper yarn introduction inlet 35 is brought into contact with the looper yarn through the looper yarn guide inlet 37 from the looper yarn introduction inlet 35.
- the conduit connection mechanism 140 is attached to the sewing machine bed, and forms a preparation position in which a looper threading lever 136 is prepared by manual operation of the looper threading lever 136, that is, primary manual operation.
- An operating portion 141 that holds the preparation position, and a looper threading that enters a looper threading state of the looper threading at a predetermined looper threading timing according to a manual rotation operation of the hand pulley HP from the preparation position, that is, a secondary manual operation.
- a looper threading positioning portion 142 that forms a position.
- the looper threading positioning portion 142 has positioning pins 147.
- the positioning pin 147 is driven synchronously with the looper, abuts against a disk 143 having a notch 144, and is displaced in the axial direction when fitted into the notch in response to a manual rotation operation of the hand pulley HP, that is, a secondary manual operation. Then, the support plate 145 of the looper yarn connection conduit 39 in the conduit connection mechanism 140 is moved by the spring 146 so that the looper yarn connection conduit 39 is aligned and brought into contact with the looper hole inlets 2g, 2h, 2i of the looper.
- the needle thread suction channel 44d As shown in FIGS. 2, 8, 12 (a), 12 (b), and 13, in the threading device 20 of the sewing machine of the present invention, the needle thread suction channel 44d, the looper thread connecting conduit 39, and the pump Between the suction port 28a and the discharge port 28b, the needle thread suction channel 44d is switched to the suction port 28a when the needle thread is threaded, and the looper thread connection conduit 39 is communicated to the atmosphere port 60d. There is provided a flow path switching device 150 for switching 28b to the looper thread connecting conduit 39 and the suction port 28a to communicate with the atmospheric port 44c.
- the flow path switching device 150 is linked with the operation of the manual lever 69, that is, the primary manual operation, and the flow path switching body 53 is integrated with the flow path control body 44,
- Reference numeral 60 has an air inlet (intake release hole) 44c and an intake release hole 60c.
- the flow path switching valve 53 is fitted into the shaft guide pipe 60g from the intake / exhaust release shaft through hole 60a, and the air inlet (intake release hole) 44c and the intake release hole 60c are arranged at the same position.
- the flow path switching valve 53 has intake / exhaust release holes 53a and 53b, and is connected to the atmospheric ports 44c and 60d according to the rotation thereof.
- the intake / exhaust release holes 53a and 53b are spaced apart from each other in the axial direction and are offset by 90 ° in the rotational direction.
- the tilt cam body 55 is rotated by the downward operation of the manual operation lever 69 of the position switching mechanism 26. Therefore, it communicates with the atmospheric ports 44c and 60d of the flow path control body 44 according to the 90 ° rotation of the flow path switching valve 53, respectively.
- the threading device 20 of the sewing machine of the present invention is controlled by a control device (CPU). That is, a needle threading button 133, a looper threading button 152, a foot controller 153, and a power switch 154 are connected to the control device (CPU).
- the sewing machine motor M1 and the pump motor M2 are driven and controlled by a control device (CPU).
- the sewing machine using the edge needle 1 (1a, 1b) and the double ring needle 1 (1e, 1f, 1g) and the looper 2 (2a, 2b, 2c) as a loop capturing device has been described.
- the present invention is also applicable to a sewing machine that uses a needle and a hook as a loop capturing device.
- the sewing machine according to the present invention when the sewing machine according to the present invention is not operated by the sewing machine motor M1, and further when the hermetic lip 7 (7a, 7b, 7c, 7d, 7e) is in the retracted position, the position of the threading device 20 of the sewing machine is switched.
- the mechanism 26 when the manual operation lever 69 is slid down the threading set lever shaft 72 together with the transmission unit 38 as the primary manual operation of the operation unit 30, the stopper release shaft 81 is moved from the lower inclined cam 69a to the linear cam.
- the needle thread suction flow path 44d is switched to the suction port 28a by the flow path switching valve 53 of the flow path switching device 150, and the looper thread connection conduit 39 is switched to the atmosphere port 60d to switch the edge needle 1 (1a, 1b) and the double ring needle 1 (1e, 1f, 1g) are brought into a needle threading enabled state (FIGS. 8 and 12B).
- the needle threading has priority over the looper threading. The operation and operation of the looper threader will be described later.
- the lip drive pin 96 of the control unit 90 rotates the control plate 50 in the clockwise direction in the lip drive pin connection groove 50b of the control plate 50, and the tilt cam body 55 described above.
- the control pin 45 has one end abutting against the inclined cam body 55 via the operating spring 47 and the cam follower connecting shaft 46, and the other end having a large control pin through hole 44a and a large control plate 50. It contacts the disk 42 through the diameter hole 50c, the spring 49, the needle threading attachment plate 41, and the control pin through hole 60b of the flow path control body 60 (FIGS. 7 and 8).
- the control pin 45 is fitted into the notch portion 42b and shifted in the axial direction. Since the threading position small diameter portion 45c is inserted into the pin small diameter insertion hole 50d, the control plate 50 swings clockwise. Accordingly, since the control unit 90 is lowered, the hermetic lip 7 (7a, 7b, 7c, 7d, 7e) connected thereto via the lip driving arm 100, the lip guide arm 103, the lip holder shaft 117, and the lip holder 110 is used. Is lowered along the cam 91a and the deformation cam 91b of the lip guide plate 91.
- the hermetic lip 7 (7a, 7b, 7c, 7d, 7e) is moved to the threading position and the edge needle 1 (1a, 1b) and the double ring needle 1 are moved. (1e, 1f, 1g).
- any group Prior to actual threading, any group is selected by operating the flow path selection lever 132 of the flow path selection device 33 used to reduce the size and capacity of the pump PU. If the channel selection lever 132 shown in FIG. 10a is swung to the right, the link 61 is connected to the channel selection pipe 64, the rocking motion of the channel selection lever 132 is changed to the linear motion of the link 61, and the channel selection is performed. In place of the rotational movement of the pipe 64, the edge intake needle inlet hole 64b is connected to the edge intake inlet hole 43b and the flow path of the edge needle 1 (1a, 1b) is selected (FIG. 10 ( b)).
- the double ring needle intake inlet hole 64c is connected to the double ring needle intake inlet hole 43c, and the flow of the double ring needle 1 (1e, 1f, 1g) A road is selected.
- Such hermetic lip 7 (7a, 7b, 7c, 7d, 7e) is brought into contact with the edge needle 1 (1a, 1b) and double ring needle 1 (1e, 1f, 1g), flow path switching, flow
- the control device drives the threading pump PU by the pump motor M2, so that the operator can use the edge needle 1 (1a, 1b) or one end of the needle thread 3a (3b, 3c, 3d, 3e) at the thread entrance 5f of the thread hole 1c, 1d, 1h, 1i, 1j of the double ring needle 1 (1e, 1f, 1g) Move closer.
- the peripheral belt ring-shaped region 22 and the peripheral The upper convex semicircular peripheral edge segment 9a of the peripheral band ring-shaped region 22 is formed into an upper flat band segment 9e extending in the horizontal direction, and the peripheral band ring-shaped region 22 and the peripheral band ring shape.
- the lower convex semicircular peripheral segment 9b of the peripheral band ring-shaped region 22 is formed in the lower part of the peripheral band ring-shaped region 22 at the lower part of the peripheral band ring-shaped region 24.
- the two side band region portions 9c and 9d of the peripheral band ring brace 22 are two side band segments 9g and 9h of the peripheral band ring brace 24.
- the edge needle 1 (1a, 1b) and the double ring needle 1 (1e, 1f, 1g) are in close contact with the peripheral band ring-shaped patch 24 of the hermetic lip 7 (7a, 7b, 7c, 7d, 7e). Therefore, when the needle thread is threaded with air pressure, it is possible to inhale only from the thread hole of the sewing needle, so that the needle thread can be threaded stably and reliably.
- the needle thread 3a (3b, 3b, which has been sucked and conveyed from the needle thread suction conduit 40a-40e to the thread stop wall 116 of the separator 120 in the threading device 20 provided between the needle thread suction conduit 40a-40e and the pump PU.
- 3c, 3d, and 3e) collide, and in the space 115g, the flow velocity of the air that collided with the yarn stopping wall 116 becomes lower than the flow velocity that is sucked and conveyed toward the pump PU and the yarn collides with the yarn stopping wall 116.
- the stopped needle thread 3a (3b, 3c, 3d, 3e) is prevented from being sucked toward the pump PU.
- the needle thread 3a (3b, 3c, 3d, 3e) having a large inertia force that has been sucked and conveyed has a lower flow velocity of the air that collides with the thread stop wall 116 than the flow velocity that is sucked and conveyed toward the pump PU. In other words, it collides with the thread stop wall 116 of the separation space 115g and is left behind by being threaded, where the needle thread and air are separated.
- air having a small inertia force in the space 115h swirls toward the flow path connected to the pump PU, and the space 115h becomes a flow path of the sucked air and passes through the flow paths 115i and 115j and the needle thread suction flow path 44d.
- the suction pump PU sucks the suction port 28a.
- the hermetic lip 7 (7a, 7b, 7c, 7d, 7e) is returned to the standby position by the raising operation of the manual operation lever 69 of the operation unit 30. That is, the support 77 rotatably supported on the threading set lever arm cover 75 by the receiving set screw 78 moves the threading lever connecting groove 52b of the inclined cam operating arm plate 52 in the needle threading positioning portion 32 in the counterclockwise direction. Rotate. For this reason, since the inclined cam body 55 rotates, the flow path switching valve 53 also rotates 90 °.
- the flow path switching valve 53 of the flow path switching device 150 switches the discharge port 28b to the looper thread connection conduit 39 and the suction port 28a to the atmosphere port 44c during looper threading, thereby switching the looper 2 (2a, 2b). 2c), the looper threading state is enabled (FIGS. 8 and 12A).
- the positioning pin 147 is in a state where the looper yarn guide conduit 37 of the conduit connection mechanism 140 is nestedly connected to the looper yarn connection conduit 39. Abuts against the disk 143 to form and hold a preparation position for preparing a looper threader.
- the positioning pin 147 is displaced in the axial direction when the positioning pin 147 is fitted into the notch portion 144 by the conduit connection mechanism 140.
- the plate 145 is slid so that the looper thread connecting conduit 39 is brought into contact with the looper hole inlets 2g, 2h, 2i of the looper 2 (2a, 2b, 2c).
- a looper threading position in which the looper threading state of the looper threading is formed is formed, the looper thread connection conduit 39 is brought into contact with the looper hole inlets 2g, 2h, 2i, and the looper holes 2d, 2e, 2f are looper thread introduction inlets 35.
- the control device drives the threading pump PU by the pump motor M2, so that the operator enters the looper thread introduction inlet 35 of the looper thread introduction mechanism 161.
- the looper yarn is pneumatically conveyed from the looper yarn connection conduit 39 of the conduit connection mechanism 140 to the looper holes 2d, 2e, and 2f through the looper yarn guide conduit 37.
- the looper 2 (2a, 2b, 2c) is looped through the looper holes 2d, 2e, 2f from the looper thread introduction inlet 35 by the air fed from the discharge port 28b of the pump PU.
- the foot controller 153 is depressed to cause the control device (CPU) to move the needle bar drive mechanism 12c, the feed mechanism 15 and the looper drive mechanism 160 from the vertical axes US and LS with the sewing machine motor M1. Since it is driven, the needle thread 3a, 3b inserted through the thread hole 1c, 1d of the edge needle 1 (1a, 1b) that moves up and down through the needle plate 13 and the edge needle on the lower side of the needle plate 13 A lower looper thread 3f that is inserted into the looper hole 2d of the lower looper 2a that reciprocates along an arcuate path so as to intersect with the path 1 (1a, 1b), and the lower looper 2a on the side of the needle plate 13.
- the control device CPU
- Edge stitches are formed on the cloth WP to be cross-sewn, and inserted into the thread holes 1h, 1i, 1j of the double ring needle 1 (1e, 1f, 1g).
- the needle thread 3c, 3d, 3e is inserted into the looper hole 2f of the double ring looper 2c that reciprocates along an elliptical arc trajectory so as to intersect with the trajectory of the double ring needle 1 (1e, 1f, 1g).
- the double ring (flat stitch) stitches are formed on the cloth WP to be sewn by crossing the double ring looper thread 3h.
- the threading device of the sewing machine uses only one pump driven by a sewing machine motor, uses its intake and exhaust for gas conveyance, performs pneumatic needle threading in the form of suction from the thread hole of the sewing needle, and
- the sewing machine can be suitably applied to sewing machines such as a lock stitch sewing machine, an edge stitch sewing machine, a double chain stitch sewing machine, and a flat stitch sewing machine that perform pneumatic looper threading in the exhaust form in the looper hole of the sewing machine looper.
- Inclined cam operating arm plate 52a Cam body mounting hole 52b ... threading lever connecting groove 52c ... mounting hole 53 ... flow path switching valve 53a, 53b ... intake / exhaust release hole 54 ... intake / exhaust release shaft pin 55 ... inclined cam body 55a ... Inclined cam 55b ... Intake / exhaust release shaft coupling hole 56 ... Screw 60 ... Flow path control body 60a ... Intake / exhaust release shaft through hole 60b ... Control pin through hole 60c ... Intake release hole 60d ... Air outlet 60e ... Axis guide pipe 61 ... Flow path selection link 64 ... Flow path selection pipe 64a ... Intake outlet hole 64b ... Inlet inlet hole for edge needle 64c ...
- Double ring needle intake inlet hole 65 Double ring needle intake inlet hole 65 ..Flow path selection arm 69 ... Manual lever 69a ... Lower inclination cam 69b ... Upper inclination cam 69c ... Long groove 69d ... Long groove 69e ... Linear cam 71 ... Threading set lever Plate 71a ... Lip guide plate mounting surface 71b ... Threading set lever shaft mounting hole 71c ... Manual lever sliding surface 71d ... Stopper release shaft relief hole 71e ... Spring hook 71j ... Slit 72 ... Threading set lever shaft 74a ... Spring mounting arm 74b ... Threading set lever shaft sliding hole 74c ... Mounting portion 74d ... Hook portion 74e ... Abutting portion 75 ...
- Thread set lever arm cover 76 ⁇ Set screw 77 ⁇ Receiver 78 ⁇ Set screw 79a, 79b ⁇ Screw 79c ⁇ Pipe 80 ⁇ ⁇ ⁇ Stopper 80a ⁇ ⁇ ⁇ Hook portion 81 ⁇ Stopper release 82 ... Stopper shaft 83 ... Stopper spring 84 ... Set screw 85 ... Washer 86 ... Lip drive spring 87 ... Spacer 88 ... Screw 89 ... Lip return spring 89a ... Spacer 89b ... Screw 90 ... Control part 90a ... Lip drive guide shaft sliding hole 90b ... Abutting part 90d ... Mounting hole 90f ... Mounting hole 91 ... Lip guide plate 91a ... Cam 91b ...
- Stopper 132 ... Flow path selection lever 132a ... Flow path selection arm 133 ... Needle threading button 135a ... Suction Valve 135b ... Discharge valve 135c ... Eccentric cam 135d ... Drive lot 135e ... Swing link 135f ... Piston 136 ... Looper threading lever 140 ... Conduit connection mechanism 141 ... Operation unit 142 Looper threading positioning unit 143 Disc 144 Notch 145 Support plate 146 Spring 147 Positioning pin 150 ... flow path switching device 152 ... looper threading button 153 ... foot controller 154 ... power switch 160 ... looper drive mechanism
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- Textile Engineering (AREA)
- Sewing Machines And Sewing (AREA)
Abstract
Description
US・・・上軸
LP・・・下軸プーリ
TV・・・タイミングベルト
UP・・・上軸プーリ
HP・・・ハンドプーリ
M1・・・ミシンモータ
M2・・・ポンプモータ
CPU・・・制御装置
WP・・・布
ST・・・針幹
PU・・・ポンプ
V・・・ベルト
PP・・・プーリ
t・・・距離
1(1a、1b)・・・縁かがり針
1c、1d、1h、1i、1j・・・糸穴
1(1e、1f、1g)・・・二重環針
1k・・・えぐり
2(2a、2b、2c)・・・ルーパ
2d、2e、2f・・・ルーパ孔
2g、2h、2i・・・ルーパ孔入口
3a、3b、3c、3d、3e・・・針糸
3f、3g、3h・・・ルーパ糸
4・・・縫目形成装置
5(5a、5b、5c、5d、5e)・・・糸出口
5f・・・糸入口
6(6a、6b、6c、6d、6e)・・・吸気口孔
7(7a、7b、7c、7d、7e)・・・ハーメチックリップ
9a・・・上部平坦形帯領域部分
9b・・・下部半円周形帯領域部分
9c、9d・・・側部帯領域部分
9e・・・上部平坦形帯セグメント
9f・・・下部半円周形帯セグメント
9g、9h・・・側部帯セグメント
9j、9k・・・翼
10・・・針棒
11・・・押え棒
12a・・・針棒・押え棒ユニット台
12b・・・針留
12c・・・針棒駆動機構
13・・・針板
14・・・押え金
15・・・送り機構
20・・・空圧糸通し装置
22・・・周辺帯リング状領域
24・・・周辺帯リング状当て具
26・・・位置切換機構
28a・・・吸い込みポート
28b・・・排出ポート
30・・・操作部
32・・・針糸通し位置決め部
33・・・流路選択装置
35・・・ルーパ糸導入入口
37・・・ルーパ糸案内導管
38・・・伝達部材
39・・・ルーパ糸接続導管
40a-40e・・・針糸吸引導管
41a、41b・・・グループ化された針糸吸引導管
41・・・針糸通し取付板
42・・・ディスク
42a・・・端面
42b・・・切欠き部
43a・・・吸気出口穴
43b・・・縁かがり針用吸気入口穴
43c・・・二重環針用吸気入口穴
43d・・・排気穴
44・・・流路制御本体
44a・・・制御ピン貫通穴
44b・・・バルブ貫通穴
44c・・・大気口
44d・・・針糸吸引流路
45・・・制御ピン
45a・・・ピン端部
45b・・・準備位置大径部
45c・・・糸通し位置小径部
45d・・・長穴
45e・・・収納穴
46・・・カムホロワ接続軸
47・・・作動バネ
49・・・バネ
47・・・作動バネ
48・・・ピン
50・・・制御プレート
50a・・・バルブ貫通穴
50b・・・リップ駆動ピン連結溝
50c・・・ピン嵌入大径孔
52・・・傾斜カム作動腕板
52a・・・カム体取り付け穴
52b・・・糸通しレバー連結溝
52c・・・取り付け穴
53・・・流路切換バルブ
53a、53b・・・吸排気解放穴
54・・・吸排気解放軸ピン
55・・・傾斜カム体
55a・・・傾斜カム
55b・・・吸排気解放軸結合穴
56・・・ネジ
60・・・流路制御本体
60a・・・吸排気解放軸貫通穴
60b・・・制御ピン貫通穴
60c・・・吸気解放穴
60d・・・大気口
60e・・・軸案内パイプ
61・・・流路選択リンク
64・・・流路選択パイプ
64a・・・吸気出口穴
64b・・・縁かがり針用吸気入口穴
64c・・・二重環針用吸気入口穴
65・・・流路選択腕
69・・・手動レバー
69a・・・下傾斜カム
69b・・・上傾斜カム
69c・・・長溝
69d・・・長溝
69e・・・直線カム
71・・・糸通しセットレバー板
71a・・・リップ案内板取付面
71b・・・糸通しセットレバー軸取付穴
71c・・・手動レバー摺動面
71d・・・ストッパー解除軸逃げ穴
71e・・・バネ掛け
71j・・・スリット
72・・・糸通しセットレバー軸
74a・・・バネ取付腕
74b・・・糸通しセットレバー軸摺動穴
74c・・・取付け部
74d・・・フック部
74e・・・当て部
75・・・糸通しセットレバー腕蓋
76・・・止ネジ
77・・・受け
78・・・受け止ネジ
79a、79b・・・ネジ
79c・・・パイプ
80・・・ストッパー
80a・・・フック部
81・・・ストッパー解除軸
82・・・ストッパー軸
83・・・ストッパーバネ
84・・・止ネジ
85・・・座金
86・・・リップ駆動バネ
87・・・スペーサ
88・・・ネジ
89・・・リップ戻しバネ
89a・・・スペーサ
89b・・・ネジ
90・・・制御部
90a・・・リップ駆動案内軸摺動穴
90b・・・当て部
90d・・・取付穴
90f・・・取り付け穴
91・・・リップ案内板
91a・・・カム
91b・・・変形カム
91f、91g・・・リップ駆動案内軸取付穴
93・・・リップ駆動案内軸
96・・・リップ駆動ピン
98・・・ピン
99・・・位置決めピン
100・・・リップ駆動腕
100a・・・揺動穴
100b・・・ピン穴
103・・・リップ案内腕
110・・・リップホルダー
115・・・セパレータ本体
115a・・・ネジ
115b・・・グループ化された吸引ポート
115c・・・グループ化された吸引ポート
115g・・・空間
115h・・・空間
115i、115j・・・流路
116・・・糸止壁
117・・・リップホルダー軸
120・・・セパレータ
131・・・流路選択レバー台
131a・・・枢軸
131b・・・ストッパー
132・・・流路選択レバー
132a・・・流路選択腕
133・・・針糸通し釦
135a・・・吸い込み弁
135b・・・排出弁
135c・・・偏芯カム
135d・・・駆動ロット
135e・・・揺動リンク
135f・・・ピストン
136・・・ルーパ糸通しレバー
140・・・導管接続機構
141・・・操作部
142・・・ルーパ糸通し位置決め部
143・・・ディスク
144・・・切欠き部
145・・・支持プレート
146・・・バネ
147・・・位置決めピン
150・・・流路切換装置
152・・・ルーパ糸通し釦
153・・・フートコントローラ
154・・・電源スイッチ
160・・・ルーパ駆動機構
Claims (15)
- ミシンの針と、前記針と協働し前記針の糸穴に糸通しされている針糸をからげて縫目形成するループ捕捉装置とを含む縫目形成装置を有し、前記針の糸穴に空圧式に糸通しするミシンの空圧糸通し装置において、
前記針の糸穴の糸出口を取囲む前記針の周辺帯リング状領域にハーメチックに当接可能で前記針の糸穴の糸出口から吸気する吸気口孔を取囲む対応した周辺帯リング状当て具を有するハーメチックリップと、
前記ハーメチックリップの前記吸気口孔に接続される針糸吸引導管と、
針糸通し時に前記ハーメチックリップを前記吸気口孔が前記針の糸穴の糸出口に位置合わせされて前記針に当接されるように糸通し位置に移動させ、縫目形成時に前記ハーメチックリップを前記針から後退させ待機位置に移動させる位置切換機構と、
前記針糸吸引導管が吸い込みポートに接続され、針糸通し時に前記針の糸穴の糸入口に差入れられる針糸の一端を、前記針の糸穴の糸出口から前記吸気口孔を経由し前記針糸吸引導管を介して前記吸い込みポートに吸気されて前記針の糸穴に針糸通しするポンプとを備えることを特徴とするミシンの空圧糸通し装置。 - 前記針は前記糸穴の上部において前記ループ捕捉装置の剣先が通過するためのえぐりを有し、前記針の周辺帯リング状領域は前記えぐりの中間部を横切る水平方向に延びる上部平坦形帯領域部分と、前記糸穴の下部を横切る水平方向に延びる下部半円周形帯領域部分と、前記上部平坦形帯領域部分及び前記下部半円周形帯領域部分間を接続する垂直方向、かつ円周方向に延びる2つの側部帯領域部分とを有し、これに対応して前記ハーメチックリップの周辺帯リング状当て具は水平方向に延びる上部平坦形帯セグメントと、水平方向に延びる下部半円周形帯セグメントと、前記上部平坦形帯セグメント及び前記下部半円周形帯セグメント間を接続する垂直方向、かつ円周方向に延びる2つの側部帯セグメントとを有することを特徴とする請求項1記載のミシンの空圧糸通し装置。
- 前記ハーメチックリップは柔軟性があるゴム、プラスチック、コルクから選ばれた1つの材料で形成されることを特徴とする請求項1記載のミシンの空圧糸通し装置。
- 前記ハーメチックリップは前記柔軟性を損なわない程度で弾力性があるゴム、プラスチック、コルクから選ばれた1つの材料で形成されることを特徴とする請求項1記載のミシンの空圧糸通し装置。
- 前記針糸吸引導管及び前記ポンプ間に、前記針糸吸引導管から吸気搬送されてきた前記針糸が衝突する糸止壁と、前記糸止壁に衝突した空気の流速が前記ポンプに向かって吸気搬送される流速に比べて低速にして前記糸止壁に衝突して糸止された前記針糸が前記ポンプに向かって吸入されるのを防止する空間とを有するセパレータを備えることを特徴とする請求項1記載のミシンの空圧糸通し装置。
- 前記位置切換機構は、一次手動操作によって前記針糸通しの準備状態となる準備位置を形成し、前記準備位置を保持する操作部と、
前記操作部と共に移動され、前記準備位置から二次手動操作に応じて予め定められる針糸通しタイミングで前記針糸通しの針糸通し状態となる針糸通し位置を形成する針糸通し位置決め部とを有することを特徴とする請求項1記載のミシンの空圧糸通し装置。 - 前記操作部は、手動操作される手動レバーと、前記手動レバーに連結され、フックによって前記準備位置を保持する伝達部材とを有し、
前記針糸通し位置決め部は、前記伝達部材を介して可動され、バネによって弾発され、前記二次手動操作に応じて予め定められる針糸通しタイミングで前記針糸通しの針糸通し状態となる針糸通し位置を形成し、前記ハーメチックリップを前記吸気口孔が前記針の糸穴の糸出口に位置合わせされるように移動して前記針に当接させる制御部材を有することを特徴とする請求項6記載のミシンの空圧糸通し装置。 - 前記針糸通し位置決め部は、制御ピンと、前記制御ピンの運動を規制する制御プレートと、前記制御プレートを貫通し、前記針と同期駆動されて切欠き部を有するディスクに当接し、前記二次手動操作に応じて前記切欠きに嵌合するとき軸方向に変位して前記制御プレートを揺動し前記制御部材によって前記ハーメチックリップを前記吸気口孔が前記針の糸穴の糸出口に位置合わせされるように移動して前記針に当接させる位置決めピンとを有することを特徴とする請求項7記載のミシンの空圧糸通し装置。
- 前記針は複数の針で構成され、前記複数の針を少なくとも2つのグループに分けて、2つのグループのそれぞれの前記針を前記ポンプの前記吸い込みポートに選択して接続する流路選択装置を有することを特徴とする請求項7記載のミシンの空圧糸通し装置。
- 前記ループ捕捉装置としてルーパと協働し前記針の糸穴及び前記ルーパのルーパ孔にそれぞれ糸通しされている針糸及びルーパ糸をからげて縫目形成する縫目形成装置を有し、
前記ポンプの排出ポートが接続されるルーパ糸導入入口と、
前記ルーパ糸導入入口に接続され前記ルーパ糸導入入口に差し込まれる前記ルーパ糸の一端が前記排出ポートから圧送される空気によって空気搬送されるルーパ糸案内導管と、
前記ルーパ糸案内導管に入れ子式に嵌合され、ルーパ糸通し時に前記ルーパのルーパ孔入口に当接するルーパ糸接続導管と、
ルーパ糸通し時に前記ルーパ糸接続導管を前記ルーパのルーパ孔入口に当接させ、前記ルーパ糸導入入口に差し込まれるルーパ糸の一端を、前記ルーパ糸導入入口から前記ルーパ糸案内導管を経由し前記ルーパ糸接続導管を介して前記ルーパのルーパ孔にルーパ糸通しを行ない、縫目形成時に前記ルーパ糸接続導管を前記ルーパのルーパ孔入口から離間させる導管接続機構とを備えることを特徴とする請求項1記載のミシンの空圧糸通し装置。 - 前記導管接続機構は、ミシンベッドに取付けされ、一次手動操作によって前記ルーパ糸通しの準備状態となる準備位置を形成し、前記準備位置を保持する操作部と、
前記準備位置から二次手動操作に応じて予め定められるルーパ糸通しタイミングで前記ルーパ糸通しのルーパ糸通し状態となるルーパ糸通し位置を形成するルーパ糸通し位置決め部とを有することを特徴とする請求項1記載のミシンの空圧糸通し装置。 - 前記ルーパ糸通し位置決め部は、前記ルーパと同期駆動され、切欠き部を有するディスクに当接し、前記二次手動操作に応じて前記切欠きに嵌合するとき軸方向に変位して前記制御プレートを移動し前記ルーパ糸接続導管を前記ルーパのルーパ孔入口に位置合わせし当接させるように移動させる位置決めピンを有することを特徴とする請求項10記載のミシンの空圧糸通し装置。
- 針糸通し時に前記針糸吸引導管を前記吸い込みポートに、前記ルーパ糸接続導管を大気口に連通させて切換え、ルーパ糸通し時に前記排出ポートを前記ルーパ糸接続導管に、前記吸い込みポートを大気口に連通させて切換える流路切換装置を備えることを特徴とする請求項9記載のミシンの空圧糸通し装置。
- 前記流路切換装置は、前記一次手動操作と連動して、前記吸い込みポート及び前記排出ポートの一方を前記針糸吸引導管及び前記ルーパ糸接続導管の一方に、前記吸い込みポート及び前記排出ポートの他方を大気口に連通させ、前記吸い込みポート及び前記排出ポートの他方を前記針糸吸引導管及び前記ルーパ糸接続導管の他方に、前記吸い込みポート及び前記排出ポートの一方を大気口に連通させて切換える流路切換バルブを有することを特徴とする請求項11記載のミシンの空圧糸通し装置。
- ミシンの針と、前記針と協働し前記針の糸穴に糸通しされている針糸をからげて錠縫縫目形成するループ捕捉装置とを含む縫目形成装置を有し、前記針の糸穴に空圧式に糸通するミシンの空圧糸通し装置において、
前記針の糸穴の糸出口を含む前記針の凸状の半円周面縁部にハーメチックに当接可能で前記針の糸穴から吸気する吸気口孔を含む対応した凹状の半円周面縁部を有するハーメチックリップと、
前記ハーメチックリップの前記吸気口孔に接続される針糸吸引導管と、
針糸通し時に前記ハーメチックリップを前記吸気口孔が前記針の糸穴の糸出口に位置合わせされるように前記針に当接させ、縫目形成時に前記ハーメチックリップを前記針から後退させ待機位置に移動させる位置切換機構と、
前記針糸吸引導管が吸い込みポートに接続され、針糸通し時に前記針の糸穴の糸入口に差入れられる針糸の一端を、前記針の糸穴の糸出口から前記吸気口孔を経由し前記針糸吸引導管を介して前記吸い込みポートに吸気されて前記針の糸穴に針糸通しするポンプとを備え、
前記ループ捕捉装置としてルーパと協働し前記針の糸穴及び前記ルーパのルーパ孔にそれぞれ糸通しされている針糸及びルーパ糸をからげて環縫縫目形成する縫目形成装置を有し、
前記ポンプの排出ポートが接続されるルーパ糸導入入口と、
前記ルーパ糸導入入口に接続され前記ルーパ糸導入入口に差し込まれる前記ルーパ糸の一端が前記排出ポートから圧送される空気によって空気搬送されるルーパ糸案内導管と、
前記ルーパ糸案内導管に入れ子式に嵌合され、ルーパ糸通し時に前記ルーパのルーパ孔入口に当接するルーパ糸接続導管と、
ルーパ糸通し時に前記ルーパ糸接続導管を前記ルーパのルーパ孔入口に当接させ、前記ルーパ糸導入入口に差し込まれるルーパ糸の一端を、前記ルーパ糸導入入口から前記ルーパ糸案内導管を経由し前記ルーパ糸接続導管を介して前記ルーパのルーパ孔にルーパ糸通しを行ない、縫目形成時に前記ルーパ糸接続導管を前記ルーパのルーパ孔入口から離間させる導管接続機構とを備えることを特徴とするミシンの空圧糸通し装置。
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DE112016003114T5 (de) | 2018-05-17 |
CN107849769A (zh) | 2018-03-27 |
CH713418B1 (de) | 2021-11-15 |
KR20180106848A (ko) | 2018-10-01 |
TW201728798A (zh) | 2017-08-16 |
JP6866968B2 (ja) | 2021-04-28 |
AU2016392328B2 (en) | 2022-04-21 |
TWI688688B (zh) | 2020-03-21 |
US20190048503A1 (en) | 2019-02-14 |
AU2016392328A1 (en) | 2018-03-22 |
CN107849769B (zh) | 2021-06-01 |
US10472754B2 (en) | 2019-11-12 |
DE112016003114B4 (de) | 2022-12-29 |
KR102510205B1 (ko) | 2023-03-14 |
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