CN1448565A - Top thread holding device for sewing machine - Google Patents
Top thread holding device for sewing machine Download PDFInfo
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- CN1448565A CN1448565A CN03107889A CN03107889A CN1448565A CN 1448565 A CN1448565 A CN 1448565A CN 03107889 A CN03107889 A CN 03107889A CN 03107889 A CN03107889 A CN 03107889A CN 1448565 A CN1448565 A CN 1448565A
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- pin
- hole
- sewing machines
- clamping device
- plate
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Classifications
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- D—TEXTILES; PAPER
- D05—SEWING; EMBROIDERING; TUFTING
- D05B—SEWING
- D05B65/00—Devices for severing the needle or lower thread
- D05B65/06—Devices for severing the needle or lower thread and for disposing of the severed thread end ; Catching or wiping devices for the severed thread
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- D—TEXTILES; PAPER
- D05—SEWING; EMBROIDERING; TUFTING
- D05B—SEWING
- D05B37/00—Devices incorporated in sewing machines for slitting, grooving, or cutting
- D05B37/04—Cutting devices
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- D—TEXTILES; PAPER
- D05—SEWING; EMBROIDERING; TUFTING
- D05B—SEWING
- D05B63/00—Devices associated with the loop-taker thread, e.g. for tensioning
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- D—TEXTILES; PAPER
- D05—SEWING; EMBROIDERING; TUFTING
- D05B—SEWING
- D05B65/00—Devices for severing the needle or lower thread
- D05B65/02—Devices for severing the needle or lower thread controlled by the sewing mechanisms
Abstract
A needle thread holding device for a sewing machine. This needle thread holding device 100 comprises: a clamping means D provided on the cylinder bed part 31a of a sewing machine bed part 31 for clamping and holding the end part of a needle thread inserted to a needle at the lower part of a throat plate 50 at the start of sewing; a stepping motor A for driving the clamping means D and making the clamping means D clamp the end part of the needle thread; and a connection means B having a long- length connection member 12 connecting the clamping means D and the stepping motor A. Then, the stepping motor A is arranged on the side of the erected body part 32 of the sewing machine 30 more than the cylinder bed part 31a, and the connection member 12 transmits the driving force of the stepping motor to the clamping means by back and forth motion or rotary motion between the side of the erected body part of the sewing machine and the vertical movement route side of the needle 52. It is capable of being adapted even to a so-called 'cylinder bed sewing machine' having a thin and long cylinder bed part on a sewing machine bed.
Description
Technical field
The present invention relates to a kind of sewing machine surface thread holding device with cylinder type board portion of elongate.
Background technology
For example, disclosed on No. the 2671478th, Japan's patent gazette and patent disclosure communique 2000-325683 number, when the sewing beginning, the face thread retaining device of clamping face thread end.
But the face thread retaining device shown in these bulletins are gone up needs two actuators (cylinder etc.) at least, and these a plurality of actuators, reaches the parts that the driving force of actuator passed to clamping face thread end parts, all will be set at the bottom of Sewing machines board.And, keep the position of upper thread to be positioned at and the path that moves up and down of Sewing needles be clipped in the middle and indulge the opposite direction (No. 2671478 communique of patent) of main body section with Sewing machines or be positioned at and be connected Sewing needles and Sewing machines and indulge on the direction (spy opens the 2000-325683 communique) that the main body section direction intersects.Face thread retaining device with this spline structure, is that all right on the Sewing machines in sufficient space is special problem if having in Sewing machines board bottom, but the Sewing machines of cylinder type board with elongate (below, be called " cylinder board Sewing machines ") on, because of the problem on the space but can not be used
Promptly, this cylinder board Sewing machines, it is the Sewing machines that uses when making tubular or bag shape sewn object, therefore, the external diameter of board portion is more little, just can make the sewn object of more little shape, and, when making bag shape sewn object, from Sewing needles to move up and down the position more little to the distance of board portion front end, just can make the short more sewn object of depth.But, because above-mentioned in the past face thread retaining device as mentioned above, needs sufficient space, and from the moving up and down the position and can not dwindle to the distance of board portion front end of the external diameter of cylinder type board portion, Sewing needles, so can not use.
Even the object of the present invention is to provide a kind of what is called " cylinder board Sewing machines " of Sewing machines of the cylinder type board portion that elongate arranged, the sewing machine surface thread holding device that also can be suitable for.
And,, can make face thread retaining device become the device of the few miniaturization of number of spare parts by driving face thread retaining device by single actuator.
Summary of the invention
The face thread retaining device of the present invention's 1 Sewing machines, Fig. 1 and shown in Figure 10 for example, be from Sewing machines board (Sewing machines board portion 31) in the outstanding cylinder board portion of elongate being arranged at, and have and dispose the upper thread end of when the sewing beginning, passing eedle in the below clamping of needle plate (50), and the end of clamping upper thread moved to the holding position of leaving from the path that moves up and down of eedle (52), and on the face thread retaining device (100) of the Sewing machines (cylinder board Sewing machines 30) of the cylinder board portion (31a) of the clamping device (D) of the upper thread end of relieving clamping behind the pin that falls of regulation pin number, it is characterized in that: have in the Sewing machines of the being located at board, and drive above-mentioned clamping device, and the upper thread end clips is held in single actuator (stepper motor A) on the above-mentioned clamping device, with the bindiny mechanism (B (or F)) of the attaching parts with the strip that is connected above-mentioned clamping device and above-mentioned actuator (12 (or ball-screw 71)); Above-mentioned attaching parts are moved or are rotatablely moved by the advance and retreat of the pathway side that moves up and down from above-mentioned Sewing machines board side direction eedle, and the driving force of above-mentioned actuator is passed to above-mentioned clamping device.
In the present invention's 1 invention, be to have than being difficult to guarantee that actuator is provided with the Sewing machines board inside in the big space of the cylinder board portion in space, configuration is as the single actuator of clamping device drive source, and connect this actuator and be located at the clamping device of cylinder board portion with attaching parts, can pass to the structure of the clamping device of being located at cylinder board portion from Sewing machines board side in the driving force of the following actuator of state by attaching parts.Therefore, as mentioned above, possess the face thread retaining device of the present invention of the few minor structure of number of spare parts, also go on the what is called " cylinder board Sewing machines ".
The present invention 2 invention is the face thread retaining device of the 1 described Sewing machines according to the present invention, it is characterized in that: above-mentioned holding position, Sewing machines board one side in the path that moves up and down with respect to eedle.
Description of drawings
Fig. 1 is the summary side elevation of cylinder board Sewing machines that is provided with the face thread retaining device of present embodiment.
Fig. 2 is the stereogram of above-mentioned face thread retaining device.
Fig. 3 is the face upwarding stereogram of above-mentioned face thread retaining device.
Fig. 4 is the top perspective view of above-mentioned face thread retaining device.
Fig. 5 is near the vertical view of parts that is used to illustrate the needle plate that comprises above-mentioned cylinder board Sewing needles plate.
Fig. 6 be used to illustrate the actuator, bindiny mechanism, relevant action mechanism, clamping device and the testing agency that constitute present embodiment each parts " initial position ", (a) be that vertical view (b) is a side view.
Fig. 7 be " clip position " that be used to illustrate each parts that constitutes above-mentioned actuator, bindiny mechanism, relevant action mechanism, clamping device and testing agency etc. reach " holding position ", (a) be that vertical view (b) is a side view.
Fig. 8 be used to illustrate each parts that constitutes above-mentioned actuator, bindiny mechanism, relevant action mechanism, clamping device and testing agency etc. " release position ", (a) be that vertical view (b) is a side view.
Fig. 9 be used to illustrate each parts that constitutes above-mentioned actuator, bindiny mechanism, relevant action mechanism, clamping device and testing agency etc. " retreating position ", (a) be that vertical view (b) is a side view.
Figure 10 is the side view of the variation of above-mentioned face thread retaining device.
Among the figure: 100-face thread retaining device, 30-cylinder board Sewing machines, 31-Sewing machines board portion (Sewing machines board), 31a-cylinder board portion, 32-indulges main body section, the 50-needle plate, the 52-eedle, A-stepper motor (actuator), B-bindiny mechanism, the 11-shank, 12-attaching parts (part of bindiny mechanism), C-relevant action mechanism, D-clamping device, 5-hold assembly (part of clamping device), 6-guiding parts (part of clamping device).
The specific embodiment
Below, with reference to accompanying drawing, the embodiment of face thread retaining device of the present invention is described.And, when explanation comprises the structure of each parts of sewing machine body of bright face thread retaining device of the present invention, in the present embodiment, determined by all directions shown in the XYZ axle among the figure, represent especially X-direction+side for right ,-side is a left side; Y direction+side be preceding ,-after side is; Z-direction+side be last ,-side is for down.
At first, the structure of simple declaration cylinder board Sewing machines 30 (hereinafter referred to as " Sewing machines ").
As shown in Figure 1, be provided with the Sewing machines 30 of this routine face thread retaining device 100, has front end stretches out and form the Sewing machines board cylinder board 31a of portion, slightly rectangular case shape the portion 31 from elongate (slightly being cylindric) to the front side that is located at, be located at the vertical main body section 32 at Sewing machines board portion 31 rear portions and forwards stretch out the arm 33 of setting with setting from vertical main body section 32.
On the Sewing machines head 34 of forming arm 33 leading sections, the shank 35 that the rotation with no illustrated main shaft moves up and down is housed, in the lower end of this shank 35 eedle 52 is housed.What in addition, Fig. 1 represented is the state that eedle 52 is passed in the upper thread end.On the cylinder board 31a of portion, fixing needle plate 50, and the pin hole 51 that eedle 52 passes when being formed on eedle 52 moving up and down on this needle plate 50.In addition, also be provided with the cylinder board portion 31a inboard of being located at needle plate 50 belows, and catching when the eedle 52 that is installed with the upper thread end descends on Fig. 1 of upper thread end does not have illustrated rotary shuttle mechanism, and when sewing finishing comprise upper thread with make tangent mechanism (with reference to the symbol among Fig. 5 60) that relevant line cuts off etc.
Below, the concrete structure of being located at the face thread retaining device of the present invention 100 in the above-mentioned Sewing machines board portion 31 is described.
As Fig. 1～shown in Figure 4, face thread retaining device 100, mainly by: as the stepper motor of single actuator (hereinafter referred to as " motor ".) A, connect motor A and the B of bindiny mechanism of the relevant action C of mechanism described later, mechanically with the C of relevant action mechanism, clamping (maintenances) upper thread end and the clamping device D that the upper thread end of clamping (maintenances) is decontroled of the mobile interlock of the B of bindiny mechanism, the control device formations such as (nothing illustrate) that detects the E of testing agency (only showing on Fig. 1) of clamping device D position, move according to detection signal control face thread retaining device 100 from the E of testing agency.
Motor A as shown in Figure 1, is set in the Sewing machines board portion 31 near vertical main body section 32 sides of the cylinder board 31a of portion.
The B of bindiny mechanism as shown in Figure 2, has: an end is fixed in shank 11 on the axial region 10 of motor A, vertically slightly is the rectangular attaching parts 12 that direction is forwards, backwards extended along the cylinder board 31a of portion.Have the 11a of hole portion in the other end of shank 11.
In addition, as Fig. 1～shown in Figure 4,, as shown in Figure 2, have the 12a of hole portion, 12b at the front side and the rear side of attaching parts 12 as attaching parts 12.And, slidably the 12b of hole portion of the 11a of hole portion of shank 11 and attaching parts 12 is fixed with segmentation screw 13.Therefore, in case form shank 11 rotations (with reference to the arrow L among Fig. 2 and Fig. 4) then attaching parts 12 just move forward and backward (with reference to the arrow M among Fig. 2～Fig. 4).
In addition, attaching parts 12, have crooked bend 12c, 12d, 12e and 12f for cloth feeding mechanism (the not having diagram) interference that prevents and be disposed at Sewing machines board portion 31 internal upper parts, and, have for and bend 12g direction bending up and down, 12h consistent with the height of the connecting portion of 12b of hole portion and shank 11.
The C of relevant action mechanism that is configured in needle plate 50 belows as shown in Figure 1, as shown in Figure 2, as its critical piece, have: be fixed in Sewing machines board portion 31 grab that line plate base (hereinafter referred to as " base ") 1, bottom grab that line plate (hereinafter referred to as " lower plate ") 2, top are grabbed line plate (hereinafter referred to as " upper plate ") 3, grabbed line base cover (hereinafter referred to as " base cover ") 4, (hereinafter referred to as " the lobe plate connecting rod ") 7 of grabbing line cam plate connecting rod, helical spring 8, roller 9.
On base 1, portion forms the slot part 1a with Rack along fore-and-aft direction in the central, and on slot part 1a, forms the hole 1b of portion along fore-and-aft direction.In addition, the width of slot part 1a, roughly the same with the width of lower plate 2 and upper plate 3.In the left and right sides of the slot part 1a of base 1, form the left hole 1c of portion and the right hole 1d of portion of gap-like respectively along fore-and-aft direction.At this, its left hole 1c of portion and the right hole 1d of portion are parallel to each other, but left hole 1c of portion and the right hole 1d of portion are the position relation of skew a little at fore-and-aft direction, and after forward, the right hole 1d of portion of the relatively left hole 1c of portion leans on.And, use screw 1e, roller 9 is installed in the left side edge portion of base 1.
Lobe plate connecting rod 7 is slightly to be flat parts along direction configuration slightly to the left and right.Be formed with left hole 7a of portion and the right hole 7c of portion at both ends, lobe plate connecting rod 7 left and right sides, as mentioned above, the right side pin 3g of the left side of lower plate 2 pin 2h and upper plate 3 passes the 7a of this hole portion, 7c.Be provided with lobe plate pin 7e in the bottom of lobe plate connecting rod 7, lobe plate pin 7e is embedded in the 12a of circular port portion that is formed at attaching parts 12 leading sections slidably.Therefore, in a single day attaching parts 12 are moved along fore-and-aft direction (with reference to the arrow M of Fig. 2～Fig. 4) by the driving force of motor A, then can pass to lobe plate connecting rod 7 to seesawing of these attaching parts 12.In addition, detailed explanation will be carried out in the action specification of face thread retaining device 100 described later, but along with from the transmission of motor A to the driving force of lobe plate connecting rod 7, each parts of the C of relevant action mechanism also carry out interlock.
In addition, in the left hand edge portion of lobe plate connecting rod 7, be provided with the 7f of cam face portion of the slight curvature corresponding with the outer circumference surface of roller 9.In addition, detailed explanation will be carried out in the action specification of face thread retaining device 100 described later, but the outer circumference surface of roller 9 that is installed on the left side edge portion of base 1 contacts with the 7f of this cam face portion.
As shown in Figure 2, clamping device D is the mechanism that is set at the front side of the above-mentioned relevant action C of mechanism, and have pass the upper thread terminal guide of through hole 2b to the guiding parts 6 of assigned position, be used for the hold assembly 5 that the upper thread end of through hole 2b is passed in clamping.
Guiding parts 6 with the recessed to the inside taper sidewall (guide wall 6a) in both sides, by two screw 6b be fixed on lower plate 2 leading section 2a, concrete be the forward edge side that is fixed on the through hole 2b of lower plate 2.And, to pass in the upper thread end under the state of through hole 2b, this upper thread end is along with the mobile guide wall 6a that is drawn towards guiding parts 6 to rear side of lower plate 2.And this upper thread end is maintained at the state that cooperates with the antetheca 2i of through hole 2b.That is, the antetheca 2i of through hole 2b has the function as the maintaining part that keeps the upper thread end.
Be installed in the hold assembly 5 of upper plate 3 leading section 3a, be formed with the circular 5b of hole portion at rearward end 5a, the 5b of this hole portion is chimeric with lug boss 3b rotationally.That is, hold assembly 5 is supported at the state that can rotate with respect to upper plate 3.And the lug boss 5d that the below of forward end 5c is provided with a little projectedly when the lug boss 3b that makes 5b of hole portion and upper plate 3 is chimeric, inserts among the through hole 2b of the leading section 2a that is formed at lower plate 2.
In addition, because the width of lug boss 5d is slightly littler than the width of the through hole 2b of lower plate 2,, become the structure that restriction hold assembly 5 rotates so when hold assembly 5 rotated with respect to upper plate 3, the left and right sides sidewall of the two ends, the left and right sides of lug boss 5d and the through hole 2b of lower plate 2 was collided.The lug boss 5d of hold assembly 5 is designed in through hole 2b to the left and right direction and moves about a little conversely speaking.
In addition, upper plate 3 with respect to lower plate 2 when the front side relatively moves, while hold assembly 5 is that fulcrum rotates and is directed to above-mentioned guide wall 6a with the lug boss 3b of upper plate 3, the antetheca 2i of the lug boss 5d of side shifting and hold assembly 5 and through hole 2b is abutted against forward.Like this, the upper thread end of can clamping passing through hole 2b state.That is, the lug boss 5d of hold assembly 5 has the function as the clamping part of clamping face thread end.
In addition, as mentioned above, in the present embodiment, with two screw 6b guiding parts 6 is fixed on the lower plate 2, and form the structure of maintaining part as one with antetheca 2i and the guiding parts 6 of this through hole 2b, but also can not establish guiding parts 6 ground the front side of through hole 2b is formed taper, the structure of guide wall is set.At this moment, the also necessary formation of the lug boss 5d of hold assembly 5 is corresponding to the taper of the shape of the front side of through hole 2b.
In addition, in the present embodiment, passing the part of upper thread end, is the opening corresponding to through hole 2b, but also can make crotch to this part.
As Fig. 1 and Fig. 6～shown in Figure 9, the E of testing agency has sensor aperture plate (hereinafter referred to as " aperture plate ") 20, initial position detecting sensor (hereinafter referred to as " initial sensor ") 21, dodges position-detection sensor (hereinafter referred to as " dodging sensor ") 22.
In addition, dodge sensor 22, also the same with initial sensor 21, be to be fixed on the sewing machine frame and to have light-emitting component and the well-known photoelectric sensor of photo detector, with moving forward and backward of aperture plate 20, the off-state the when on-state when the second detected portion 20b is in (i) and blocks the light 22a that dodges sensor 22 is not (ii) blocked.And, dodge sensor 22, to the detection signal of control device (not having diagram) output expression on-state or off-state.
In addition, though diagram does not describe in detail, but control device, be to be the device of basic comprising with CPU, ROM, interface, the calculation processing apparatus that possesses the system busbar that they are connected, it has stored sewing program and the stitch data that uses etc. in this sewing program, and each parts that output to Sewing machines 30 according to the driving signal of CPU result of calculation.In addition, the control device relevant with present embodiment, with above-mentioned as the E of testing agency initial sensor 21 and dodge sensor 22 and be connected, and import whether detected expression clamping device D is in initial position and whether clamping device D locates to dodge the detection signal of position that begins, control according to this detection signal.And control device is also controlled the action of each parts of the action (angle of revolution and rotary speed) of motor A and tangent mechanism described later 60 (with reference to Fig. 5).
In addition, as shown in Figure 5, in the cylinder board 31a of portion of Sewing machines 30, be provided with cut off comprise upper thread with the tangent mechanism 60 that is sewed with the shutdown line.Tangent mechanism 60, have connecting rod 61, first connecting rod 62, second connecting rod 63, be fixed in fixed cutting tool 64 on the needle plate 50, be set to can with respect to fixed cutting tool 64 by from movable cutting knife 65.Connecting rod 61 is in the cylinder board 31a of portion and omit the parts that extend along the cylinder board 31a of portion vertical (fore-and-aft direction), and with pin 66 leading section of connecting rod 61 is rotatably connected on the end of first connecting rod 62.With segmentation screw 67 the pars intermedia of first connecting rod 62, needle plate 50 is installed in the place aheads of pin hole 51 flexibly rotationally relatively.
With pin 68 the other end of first connecting rod 62, be rotatably connected on the end of second connecting rod 63.With pin 69 the other end of second connecting rod 63, be rotatably connected on the substantial middle part of movable cutting knife 65.With segmentation screw 70 movable cutting knife 65 is installed on the needle plate 50 rotatably.Be provided with the blade 65a of blade-like on above the movable cutting knife 65 at this.
In addition, under state shown in Figure 5, according to making no illustrated impulse motor action, with the connecting rod 61 of this impulse motor interlock side shifting backward, follow this to move and with the state between first connecting rod 62 and second connecting rod 63, movable cutting knife 65 be axial rotary front side rotation (with reference to the arrow N of Fig. 5) with segmentation screw 70.At this moment, pass pin hole 51 upper thread and and make relevant machine line, by the 65b of the line falling portion line falling of movable cutting knife 65, and in the position that the blade 65a of movable cutting knife 65 and the blade 64a of fixed cutting tool 64 overlap up and down, with this cutting knife 64,65 with its cut-out (clamping cut-out).
Below, to when on cloth, making, the action of each parts of above-mentioned face thread retaining device 100 describes.
At first, begin preceding action with reference to Fig. 6 explanation from making to each parts of making formation motor A, the B of bindiny mechanism, the C of relevant action mechanism, clamping device D and the E of testing agency that just begin the later stage.
The action of each parts, as follows:
(O1) shank 11 is a fulcrum with axial region 10, is rotated the angle (with reference to the arrow L0 of Fig. 6 (a)) of regulation to the front side by the rotation of motor A.And, with segmentation screw 13 be fixed on slidably on the shank 11 attaching parts 12 also forward side shifting (hereinafter referred to as " advancing ".) (with reference to the arrow M0 of Fig. 6 (a)).
(O2) the lobe plate connecting rod 7 that is connected with attaching parts 12 pins advances with the integral body of advancing of attaching parts 12.
(O3) right side pin 3g of the upper plate 3 that is connected with lobe plate connecting rod 7 pin advances and collides (stop) with the antetheca of the right hole 1d of portion along the right hole 1d of portion of base 1 with advancing of lobe plate connecting rod 7, is in the state that the right 3g of pin of restriction advances.At this moment and the upper plate 3 that becomes one of right pin 3g also advance, and upper plate 3 is positioned at the front position.
(O4) left side pin 2h of the lower plate 2 that is connected with lobe plate connecting rod 7 pins advances along the left hole 1c of portion of base 1 with advancing of lobe plate connecting rod 7.At this moment, the left hole 1c of portion of base 1 and the right hole 1d of portion, because the left hole 1c of portion is formed on than the right hole 1d of portion a little on the front relatively, so the right side of upper plate 3 pin 3g than the left side pin 2h of lower plate 2 earlier with the antetheca of the right hole 1d of portion collide (state of O3), subsequently, the left side of lower plate 2 pin 2h is fulcrum ground with the right side pin 3g of upper plate 3 to advance along the left hole 1c of portion of base 1.Then, the advancing of this left side pin 2h, be advancing of lower plate 2, the through hole 2b that lasts till lower plate 2 arrive needle plate 50 pin hole 51 under till the front position of defined, and control device (not having diagram) stops motor A so that it stops constantly at this.
In addition; the fore-and-aft direction length of the left hole 1c of portion of base 1 is formed suitable size; even have the surplus that pin 2h in a left side arrives the front position, also do not collide with the antetheca of the left hole 1c of portion; collide and motor A imbalance with the antetheca that prevents left side pin 2h and the left hole 1c of portion; and the discomfort of the attaching parts 12 during restriction contingency motor A imbalance moves, and protects the mechanism of face thread retaining device with this.
(O5) when lower plate 2 and upper plate 3 were positioned at the front position, the preceding pin 2g of lower plate 2 and the back pin 3f of upper plate 3 were in the state that leaves of the pulling force of mutual opposing helical spring 8.In addition, at this moment be subjected to along fore-and-aft direction approaching pulling force mutually because of the back pin 3f of the preceding pin 2g of the power lower plate 2 of helical spring 8 and upper plate 3, but because the power of motor A is bigger than the pulling force of helical spring 8, so lower plate 2 can be resisted the pulling force of helical spring 8 and is positioned at the front position.
(O6) in addition, when lower plate 2 and upper plate 3 were positioned at the front position, at the antetheca 2i on the through hole 2b of lower plate 2, separate with the lug boss 5d of hold assembly 5 on being installed on upper plate 3 leading section 3a, through hole 2b was in open mode.At this moment, through hole 2b is in the state that overlaps up and down with the pin hole 51 of needle plate 50, and the pin hole 51 that the eedle 52 of making first pin after the beginning can pass this through hole 2b and needle plate 50 moves up and down.
(O7) attaching parts 12 are in forward travel state, and initial sensor 21 and dodge sensor 22 and all be in off-state.
In addition, each parts is in the position (hereinafter referred to as " initial position ") of the state shown in above-mentioned (01)～(07), is that clamping device D is positioned at the position on the path that moves up and down of eedle 52.
In addition, about above-mentioned (O7), each parts is when being positioned at " initial position ", when initial at least sensor 21 and side's sensor of dodging sensor 22 are on-state, control device (do not have diagram) is according to the signal that this side's sensor goes out, and stops the startup or the driving of Sewing machines 30 itself.That is, make the clamping device D before the beginning,, can stop the startup or the driving of Sewing machines when being configured in when being positioned at from position that normal " initial position " departs from etc.Therefore, can prevent the interference of the eedle 52 of the clamping device D and first pin.
(O8) then, in a single day each parts is positioned at " initial position " normally, then is installed with the eedle 52 of first pin of upper thread end, moves up and down with regard to passing pin hole 51 and through hole 2b.And, when the upper thread end descends at eedle 52, draw from the below by rotating shuttle (not having diagram), subsequently, when eedle 52 rises, under the state that passes through hole 2b and pin hole 51, be in hang.
Below, the action of each parts of formation motor A, the B of bindiny mechanism, the C of relevant action mechanism, clamping device D and the E of testing agency that begin back (eedle 52 of first pin moves up and down back) is made in explanation with reference to Fig. 7.
The action of each parts, as follows:
(P1) shank 11 is fulcrum, rotates the angle of stipulating (with reference to the arrow L1 of Fig. 7 (a)) to rear side by the rotation of motor A with axial region 10.And, be fixed on attaching parts 12 on the shank 11 slidably with segmentation screw 13, also backward side shifting (hereinafter referred to as " retreating ".) (with reference to the arrow M1 of Fig. 7 (a)).
(P2) the lobe plate connecting rod 7 that is connected with attaching parts 12 pin retreats with the integral body that retreats of attaching parts 12.
(P3) in case lobe plate connecting rod 7 begin to retreat, upper plate 3, then since the back pin 3f of upper plate 3 be subjected to helical spring 8 forwards pulling force and the right side pin 3g of upper plate 3 collide with the antetheca of the right hole 1d of portion of base 1, so stand fast at first, be that lower plate 2 begins to retreat.Then, preceding pin 2g that is separated from each other and back pin 3f (with reference to O5), with retreating of lobe plate connecting rod 7, close mutually by the pulling force of the helical spring 8 on the back pin 3f of preceding pin 2g that hangs over lower plate 2 and upper plate 3, and also retreat a little with lower plate 2 and upper plate 3 that this pin becomes one.
In addition, upper plate 3 also retreats at leisure along with the distance with lower plate 2 diminishes, but because the amount of retreating of lower plate 2 is big, so upper plate 3 is approaching mutually with lower plate 2.
(P4) pin 3g in the right side of upper plate 3 follows retreating of upper plate 3, when the restriction (with reference to O3) with the right hole 1d of portion of base 1 is disengaged, retreats a little along the right hole 1d of portion of base 1.At this moment, the left side pin 2h two that sells 3g and lower plate 2 with the right side of upper plate 3 sells the lobe plate connecting rod 7 that the implementation keyings are closed, be in respect to fore-and-aft direction slightly to be vertical state, at this constantly, the also mobile roughly the same amount of upper plate 3 and lower plate 2.
(P5) when lower plate 2 and upper plate 3 retreat, owing to just begun to retreat from lower plate 2 and upper plate 3, the amount of retreating of its lower plate 2 is than the amount of retreating big (with reference to P4) of upper plate 3, so the antetheca 2i of the through hole 2b of lower plate 2 and be fixed in the guiding parts 6 of leading section 2a is just to retreating near hold assembly 5 ground on the leading section 3a that is installed on upper plate 3.At this moment, the antetheca 2i of the lug boss 5d of hold assembly 5 and lower plate 2 through hole 2b is in the state that is abutted against mutually, and through hole 2b is in closing state.And, when through hole 2b closes, pass the upper thread end of open mode through hole 2b, be held between lug boss 5d and the antetheca 2i.
At this, when through hole 2b closes, passed the upper thread end of through hole 2b, with the guide wall 6a of guiding parts 6 combine the central portion that on one side be directed into antetheca 2i on one side.And, since hold assembly 5 with in through hole 2b to the gapped slightly state of left and right directions, can be supported in rotationally on the lug boss 5d of hold assembly 5 with respect to upper plate 3, so lug boss 5d on one side with respect to antetheca 2i orientedly slightly swing, one side is abutted against with antetheca 2i.According to such structure, be used for the helical spring 8 that lug boss 5d and antetheca 2i force to be abutted against is not needed very big pulling force, just can be between lug boss 5d and antetheca 2i soft and termination clamping upper thread securely portion.
And at this moment, to having the antetheca 2i as the through hole 2b of above-mentioned maintaining part function, the hold assembly 5 that has as above-mentioned clamping part function relatively moves, with the termination portion of the above-mentioned upper thread of clamping, so clamping device D is positioned at " clip position ".
(P6) then, the lug boss 5d that the termination portion of upper thread is remained on hold assembly 5 and the antetheca 2i of through hole 2b between state under, clamping device D retreats a little again, face thread retaining device A is in motionless state.Under this state, carry out the pin that falls by the regulation pin number (for example, 2～3 pins) of eedle 52 (with reference to Fig. 5).
(P7) along with the retreating of attaching parts 12, the first detected portion 20a of aperture plate 20 hides the light 21a of initial sensor 21, and initial sensor 21 is in on-state.At this moment, dodge sensor 22 and intactly be in off-state.
In addition, each parts is in " holding position " of state shown in above-mentioned (P1)～(P7), be clamping device D through " clip position " of the termination portion of clamping upper thread and by " initial position " from the path that moves up and down of eedle 52 (with reference to Fig. 5 (b)) to Sewing machines board portion 31 sides, promptly towards position that main body section 32 side direction rear sides leave, and, as antetheca 2i, be positioned at the position of the upper thread end that is held by clamping device D maintenance with the through hole 2b that keeps function.Therefore, motion track is not expanded to the radial direction of cylinder board portion.
In addition, relevant above-mentioned (P6) (P7), when each parts is positioned at " holding position ", initial sensor 21 becomes on-state from off-state, but when clamping device D is positioned at normally " holding position " and initial sensor 21 and is in on-state, then according to the detection signal of initial sensor 21, control eedle 52 carries out the pin that falls of regulation pin number (for example, 2～3 pins) to control device (not having diagram).With this, can prevent the interference of the eedle 52 that the clamping device D and second pin are later.
Below, with reference to Fig. 8 explanation action after the clamping (maintenance) of upper thread end, that constitute each parts of motor A, the B of bindiny mechanism, the C of relevant action mechanism, clamping device D and the E of testing agency.
The action of each parts, as follows.
(Q1) shank 11 is fulcrum, rotates the angle of stipulating (with reference to the arrow L2 of Fig. 8 (a)) by the rotation of motor A to rear side with axial region 10.And the attaching parts 12 that are fixed on slidably on the shank 11 with segmentation screw 13 also retreat (with reference to the arrow M2 of Fig. 8 (a)).
(Q2) carry out the lobe plate connecting rod 7 that pin is connected with attaching parts 12, retreat with the integral body that retreats of attaching parts 12.And when surpassing the amount of retreating of regulation, the 7f of cam face portion of lobe plate connecting rod 7 contacts with the outer circumference surface of roller 9.
(Q3) along with the retreating of lobe plate connecting rod 7, the right side pin 3g of the left side of lower plate 2 pin 2h and upper plate 3 also retreats a little along the left hole 1c of portion and the right hole 1d of portion of base 1.At this moment, because selling 3g two sides, the right side of the left side of lower plate 2 pin 2h and upper plate 3 all retreats, so also retreat a little with this pin all-in-one-piece lower plate 2 and upper plate 3.
At this moment, owing in a single day lobe plate connecting rod 7 surpasses the amount of stipulating of retreating, then the 7f of cam face portion just contacts (with reference to Q2) with the outer circumference surface of roller 9, so the right side of upper plate 3 pin 3g is to prop up a point backing with this contact site.At this moment, because of the 7f of cam face portion is restricted with a left side the retreating a little of 2h of pin that contacts lower plate 2 of roller 9 outer circumference surfaces, so the amount of retreating of right pin 3g is bigger than the amount of retreating of left side pin 2h.Therefore, with the amount of retreating of right side pin 3g and left side pin 2h all-in-one-piece upper plate 3 and lower plate 2, also be that the amount of retreating of upper plate 3 is bigger than the amount of retreating of lower plate 2.
(Q4) when lower plate 2 and upper plate 3 retreat, because the amount of retreating of upper plate 3 is than the amount of retreating big (with reference to Q3) of lower plate 2, so be installed on the lug boss 5d (with reference to P5) of the hold assembly 5 on the upper plate 3 leading section 3a, also retreat, so through hole 2b be in the state of opening a little with leaving from antetheca 2i.In brief, on one side be exactly that lower plate 2 and 3 liang of plates of upper plate retreat, Yi Bian through hole 2b becomes the state of opening a little from closure state.And under this occasion, the upper thread end (with reference to P5 and P6) that is held between the antetheca 2i of the lug boss 5d of hold assembly 5 and through hole 2b is decontroled.
(Q5) along with the retreating of attaching parts 12, aperture plate 20 also retreats, but aperture plate 20 does not retreat into and the second detected portion 20b hidden dodge the light 22a of sensor 22.Therefore, at this moment, initial sensor 21 still is an on-state, and, dodge sensor 22 and also be in original off-state.
In addition, each parts is in the position (hereinafter referred to as " release position ") of state shown in above-mentioned (Q1)～(Q5), be clamping device D from " holding position " further from the path that moves up and down of eedle 52 (with reference to Fig. 5 (b)) towards Sewing machines board portion 31 to position that rear side leaves, and have lug boss 5d, be positioned at position having that antetheca 2i as the through hole 2b of above-mentioned maintaining part function relatively moves and the upper thread end being decontroled as the hold assembly 5 of above-mentioned clamping part function.
Below, the action of each parts of formation motor A, the B of bindiny mechanism, the C of relevant action mechanism, clamping device D and the E of testing agency after the relieving of upper thread end is described with reference to Fig. 9.
The action of each parts, as follows.
(R1) shank 11 is fulcrum, rotates the angle of stipulating (with reference to the arrow L3 of Fig. 9 (a)) to rear side again by the rotation of motor A with axial region 10.And the attaching parts 12 that are fixed on slidably on the shank 11 with segmentation screw 13 also further retreat (with reference to the arrow M3 of Fig. 9 (a)).
(R2) carry out the lobe plate connecting rod 7 that pin is connected with attaching parts 12, retreat again with the integral body that retreats of attaching parts 12.At this moment, on one side the 7f of cam face portion of lobe plate connecting rod 7 continue to contact with the outer circumference surface of roller 9, Yi Bian lobe plate connecting rod 7 retreats.
(R3) along with further the retreating of lobe plate connecting rod 7, the right side pin 3g of the left side of lower plate 2 pin 2h and upper plate 3 also further retreats along the left hole 1c of portion and the right hole 1d of portion of base 1.At this moment, because selling 3g two sides, the left side pin 2h and the right side all retreat, so also continue to retreat with this pin all-in-one-piece lower plate 2 and upper plate 3.
At this moment, because when left side pin 2h and right pin 3g retreat, the 7f of cam face portion of lobe plate connecting rod 7 contact with the outer circumference surface of roller 9 and on the left hole 1c of portion of base 1 and the right hole 1d of portion the right hole 1d of portion relatively be formed at than the left hole 1c of portion a little by rear side, so the right side of upper plate 3 pin 3g, contact point with 7f of cam face portion and roller 9 is a point backing, and the amount of retreating of therefore right pin 3g is also big than left side pin 2h.At this moment, carry out the lobe plate connecting rod 7 that keyings are closed, be in the state that direction to the left and right tilts a little with two pins of left side pin 2h and right pin 3g.
Then, the rear wall of the left hole 1c of portion of left side pin 2h and base 1 is collided (stop), and the confined state that is in that retreats of 2h is sold on a left side.In addition, right pin 3g retreats, because of control device (not having diagram) has stopped the rearmost position that motor A stops at regulation.In addition; the rear of the right hole 1d of portion of base 1 to length be formed suitable size; arrive the surplus of also not colliding with the rear wall of the right hole 1d of portion in above-mentioned rearmost position even have right pin 3g; in order to preventing because of the motor A imbalance of colliding of right side pin 3g and the rear wall of the right hole 1d of portion, and restriction is just in case the improper mechanism that moves and protect face thread retaining device of the attaching parts 12 during motor A imbalance.At this moment, lower plate 2 and upper plate 3 with left side pin 2h and right pin 3g become one are positioned at the rearmost position.
(R4) when lower plate 2 and upper plate 3 were positioned at the rearmost position, the preceding pin 2g of lower plate 2 and the back pin 3f of upper plate 3 were in the pulling force that overcomes helical spring 8 and the state that leaves mutually.In addition, at this moment, because of the preceding pin 2g of the pulling force lower plate 2 of helical spring 8 and the back pin 3f of upper plate 3 are subjected to approaching pulling force mutually, but because the pulling force of the driving force ratio helical spring 8 of motor A is big, so upper plate 3 can overcome the pulling force of helical spring 8 and be positioned at the rearmost position.
(R5) in addition, when lower plate 2 and upper plate 3 are positioned at the rearmost position, antetheca 2i on the through hole 2b of lower plate 2 further separates with the lug boss 5d of hold assembly 5 on being installed on upper plate 3 leading section 3a, and through hole 2b becomes full-gear from the state of opening a little (with reference to Q4).At this moment, movable cutting knife 65 grades of tangent mechanism 60 shown in Figure 5 do not contact with the parts of face thread retaining device 100, can not damage the undesirable condition of movable cutting knife 65 grades.
(R6) along with attaching parts 12 continue retreat, the second detected portion 20b of aperture plate 20 covers the light 22a of initial sensor 22, dodges sensor 22 and is in on-state.At this moment, initial sensor 21 and dodge sensor 22 two sensorses and be in on-state.
In addition, each parts is in the position of state shown in above-mentioned (R1)～(R6) (hereinafter referred to as " dodging the position ", be clamping device D from " holding position " and again by the path that moves up and down of eedle 52 (with reference to Fig. 5 (b)) towards vertical main body section 32 to position that rear side leaves, and clamping device D is positioned at from the path that moves up and down of eedle 52 (with reference to Fig. 5 (b)) and keeps out of the way the position of side to the end.
Be somebody's turn to do " dodging the position ", be set at abundant distance has been left in a upper thread end that cooperates with maintaining part (antetheca 2i) from the mobile route of rotating shuttle (detailed is the wedge angle of rotating shuttle) position.Therefore, clamping device D from " open position " when " dodging the position " is mobile, clamping device D can be when stopping at " holding position ", the upper thread end that sews up cloth with rotating shuttle extracted from cloth and leave from the mobile route of rotating shuttle.
(R7) in a single day clamping device D moves to " dodging the position " from " open position ", then can prevent from the upper thread end that is in by the state of relieving is left from the rotating shuttle path, and the upper thread of pulling out from cloth sews up cloth through through hole 2b once more.
And, " dodging the position " being set in the position of further leaving from the path that moves up and down of eedle 52 than above-mentioned position, if pull out from through hole 2b the upper thread end, then also can sew up in the needle tracking that forms thereafter.
And, as mentioned above, each parts of face thread retaining device 100, in case from " initial position " " process " clip position ", " holding position " reach " open position " arrival and " dodge the position "; then carry out the pin that falls of required pin number; subsequently, comprise upper thread with tangent mechanism shown in Figure 5 60 with the cut-out of making relevant machine line, and finish the circulation of making.
In addition, about above-mentioned (R6), when each parts was positioned at " dodging the position ", when dodging sensor 22 for off-state, control device (not having diagram) was dodged the detection signal of sensor 22 according to this, and control stops the driving to Sewing machines 30 or tangent mechanism 60.That is, the clamping device D after making when being configured in any position, can stop the driving to Sewing machines 30 or tangent mechanism 60 from normal " dodging the position ".Therefore, can prevent the interference of movable cutting knife 65 grades of clamping device D and formation tangent mechanism 60.
More than, according to present embodiment, as shown in Figure 1, in the Sewing machines board of vertical main body section 32 sides with space bigger than the cylinder board 31a of portion that the space is set that is difficult to guarantee actuator, configuration is as the motor A of the drive source of clamping device D, and, disposed the attaching parts 12 of the strip that can move along fore-and-aft direction (the elongated shape cylinder board 31a of portion vertically) to the left and right in the cylinder board 31a of portion of the moving range of direction at restriction and the parts of actuator interlock.And, move according to making motor A action, make the attaching parts of being located in the cylinder board 31a of portion 12 to be omited with advancing and retreat, and clamping device D slightly moved along fore-and-aft direction between pathway side and the vertical main body section 32 moving up and down of eedle 52 along fore-and-aft direction.That is, attaching parts 12 and clamping device D not to the left and right direction move, and can pass to the structure of clamping device D to the driving force of motor A (revolving force).Therefore,, and limited on the what is called " cylinder board Sewing machines " of the parts moving range that is connected with actuator, also can use the face thread retaining device 100 of present embodiment even in the space that is provided with of having limited the actuator part.
In addition, the present invention is not limited to the foregoing description, without departing from the spirit and scope of the present invention, also can carry out the change of various improvement and design.
For example, also can replace the B of bindiny mechanism shown in Figure 1 with the F of bindiny mechanism shown in Figure 10.The F of bindiny mechanism, as shown in figure 10, have: external thread part 71a is arranged and the ball-screw 71 (attaching parts) of the length of slightly extending along fore-and-aft direction (the cylinder board 31a of portion vertically), have with nut 72, attaching nut 72 and the C of relevant action mechanism of the internal thread part of the external thread part 71a threaded engagement of ball-screw 71 be connected connecting rod 73.With attaching parts 74 rearward end of ball-screw 71 is connected on the axial region 10 of motor A, and ball-screw 71 rotates because of motor A.And, with two screw 72a the rearward end that connects connecting rods 73 is fixed on the top of nut 72, and connecting rod connects 73 leading section, carrying out slidably with the lobe plate pin 7e of lobe plate connecting rod 7, pin is connected.And, possessing on the F of bindiny mechanism of said structure, with the method that makes motor A action and the ball-screw 71 of the F of bindiny mechanism is rotatablely moved, the nut 72 that has with the internal thread part of the external thread part 71a threaded engagement of ball-screw 71 is moved forward and backward, and, can pass to clamping device D to the driving force of motor A (rotatory force) by connecting connecting rod 73 and the C of relevant action mechanism.Therefore, the same with face thread retaining device 100 shown in Figure 1, even on so-called " cylinder board Sewing machines ", also can use face thread retaining device shown in Figure 10 100.
According to the present invention, it is the single actuator that in Sewing machines board portion, disposes as the clamping device drive source, and this actuator is connected with the clamping device of being located at Sewing machines board portion, and can pass to the driving force of actuator from the Sewing machines board side of Sewing machines the structure of the clamping device of being located at Sewing machines board portion by attaching parts with attaching parts.Therefore, even so-called " cylinder board Sewing machines " also can use the face thread retaining device of the present invention that possesses said structure.
Claims (2)
1. the face thread retaining device of a Sewing machines, be set at from the cylinder board portion that Sewing machines board elongate is protruded, and be provided with when beginning sewing clamping below the needle plate pass eedle the upper thread end, and the upper thread end of clamping moved to the holding position in the path that moves up and down of leaving eedle and the clamping device of the upper thread end that relieving is held behind the pin that falls of regulation pin number, it is characterized in that having:
Be located in the Sewing machines board and drive described clamping device and make the upper thread end clips be held on the described clamping device single actuator and
The bindiny mechanism that the attaching parts of the strip that connects described clamping device and described actuator are arranged,
Described attaching parts are moved or are rotatablely moved by the advance and retreat of the pathway side that moves up and down from described Sewing machines board side direction eedle, and the driving force of described actuator is passed to described clamping device.
2. the face thread retaining device of Sewing machines according to claim 1 is characterized in that: described holding position, the Sewing machines board side in the path that moves up and down with respect to eedle.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2002100147 | 2002-04-02 | ||
| JP2002100147A JP4138355B2 (en) | 2002-04-02 | 2002-04-02 | Upper thread holding device for sewing machine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1448565A true CN1448565A (en) | 2003-10-15 |
| CN100485109C CN100485109C (en) | 2009-05-06 |
Family
ID=28786230
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB031078893A Expired - Lifetime CN100485109C (en) | 2002-04-02 | 2003-04-01 | Top thread holding device for sewing machine |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JP4138355B2 (en) |
| KR (1) | KR100986891B1 (en) |
| CN (1) | CN100485109C (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100591825C (en) * | 2004-03-30 | 2010-02-24 | 兄弟工业株式会社 | Threading holder of sewing machine |
| CN101812779A (en) * | 2009-02-24 | 2010-08-25 | 大和缝纫机制造株式会社 | The cutting facility of Sewing machines |
| CN1676723B (en) * | 2004-03-30 | 2011-01-12 | 兄弟工业株式会社 | Thread-cutting device of sewing machine |
| CN101046040B (en) * | 2006-03-31 | 2011-11-09 | 兄弟工业株式会社 | Wire clamping device for keyhole sewing machine |
| CN101046039B (en) * | 2006-03-31 | 2011-11-09 | 兄弟工业株式会社 | Wire clamping device for keyhole sewing machine |
| CN101333737B (en) * | 2007-06-26 | 2012-05-23 | 日星产业缝制机械株式会社 | Upper thread breaking and clamping device for sewing machine |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6055995A (en) * | 1983-09-06 | 1985-04-01 | ブラザー工業株式会社 | Sewing start yarn gripper in single yarn chain stitch sewing machine |
| JPH0710316B2 (en) * | 1986-09-11 | 1995-02-08 | アイシン精機株式会社 | Sewing machine thread trimmer |
| JP2671478B2 (en) * | 1989-02-10 | 1997-10-29 | ブラザー工業株式会社 | Needle thread clamp device for sewing machine |
| JP2747776B2 (en) * | 1993-08-27 | 1998-05-06 | 宮本株式会社 | Sewing machine automatic thread trimmer |
-
2002
- 2002-04-02 JP JP2002100147A patent/JP4138355B2/en not_active Expired - Fee Related
-
2003
- 2003-04-01 CN CNB031078893A patent/CN100485109C/en not_active Expired - Lifetime
- 2003-04-01 KR KR1020030020469A patent/KR100986891B1/en active IP Right Grant
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100591825C (en) * | 2004-03-30 | 2010-02-24 | 兄弟工业株式会社 | Threading holder of sewing machine |
| CN1676723B (en) * | 2004-03-30 | 2011-01-12 | 兄弟工业株式会社 | Thread-cutting device of sewing machine |
| CN101046040B (en) * | 2006-03-31 | 2011-11-09 | 兄弟工业株式会社 | Wire clamping device for keyhole sewing machine |
| CN101046039B (en) * | 2006-03-31 | 2011-11-09 | 兄弟工业株式会社 | Wire clamping device for keyhole sewing machine |
| CN101333737B (en) * | 2007-06-26 | 2012-05-23 | 日星产业缝制机械株式会社 | Upper thread breaking and clamping device for sewing machine |
| CN101812779A (en) * | 2009-02-24 | 2010-08-25 | 大和缝纫机制造株式会社 | The cutting facility of Sewing machines |
Also Published As
| Publication number | Publication date |
|---|---|
| KR20030079742A (en) | 2003-10-10 |
| JP4138355B2 (en) | 2008-08-27 |
| KR100986891B1 (en) | 2010-10-08 |
| CN100485109C (en) | 2009-05-06 |
| JP2003290582A (en) | 2003-10-14 |
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Granted publication date: 20090506 |