CN1743531A - Drive force transmission device of double-needle sewing machine - Google Patents
Drive force transmission device of double-needle sewing machine Download PDFInfo
- Publication number
- CN1743531A CN1743531A CN 200510099836 CN200510099836A CN1743531A CN 1743531 A CN1743531 A CN 1743531A CN 200510099836 CN200510099836 CN 200510099836 CN 200510099836 A CN200510099836 A CN 200510099836A CN 1743531 A CN1743531 A CN 1743531A
- Authority
- CN
- China
- Prior art keywords
- shank
- card
- recess
- hooking sheet
- scaffold
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Landscapes
- Sewing Machines And Sewing (AREA)
Abstract
A drive force transmission device of a double-needle sewing machine respectively transmits the driving force of a main axis to two parallel needle bars which are liftably supported on the bearing frame of the needle bar, which is characterized in that it comprises a stop trough with a predetermined space up-and-down, arranged on the upper side and the lower side of the needle bar; a longitudinal slot formed on the stop trough; a movement bar supported in the longitudinal slot by a swing axis of a hub fulcrum pin in the middle of the length direction with a projecting joint surface at the upper terminal and the lower terminal to alternatively block the upper and the lower stop trough; a needle bar crank connected with the main axis; a needle bar clamping seat machine which is connected with the crank and provided with a first limit piece engaged with the lower limit trough of each needle bar, a first force applying member acting the first limit piece to the engagment side and a locking mechanism locking the first limit piece to the non-engagment position; a needle bar limit mechanism which is arranged on the needle bar bearing frame and provided with a second limit piece engaged with the upper limit trough of each needle bar and a second force supplying member acting the second limit piece to the engagment side.
Description
Technical field
The present invention relates to the shank card of arbitrary obsolete suture needle in the crosspointer is only remained on its upper, can make the driving force transfer device of the interim two-needle sewing machine that interrupts of formation of side's stitching of two-wire stitching.
Background technology
In the past, use double needle machine Sewing machine with needle feed etc. when forming the two-wire stitching around the pocket cloth of jeans etc., corner portion at the pocket cloth, the shank that forms stitching inboard in the two-wire stitching is temporarily remained on upper stops it, after only making continuous formation of stitching in the outside, along with the sewing finishing of corner portion, the shank that stops is moved up and down.
For example, (disclosed the sewing machine needle bar motion control device that can carry out above-mentioned action among the 2nd～3 page of the JP-U-55-34938, Fig. 1～Fig. 3) at the real public clear 55-34938 communique of Japan Patent.In this sewing machine needle bar motion control device, machine spindle is connected with the shank holder by the shank bent axle, and the shank holder moves up and down.Liftably be supported on 2 shanks of shank scaffold, forming up and down that a pair of card ends recess, the 1st hooking sheet of being located at the shank holder and this card only in the recess card of downside end recess when chimeric, shank moves up and down with the shank holder.Be located at the 2nd hooking sheet of shank scaffold and a pair of card up and down and end in the recess card of upside and end recess when chimeric, shank stops at the upper of its stroke.
A pair of card up and down at described shank ends the actuating strut that is provided with above-below direction length on the recess, when described actuating strut rotates by switching device shifter, by this actuating strut a pair of card up and down being ended recess stops up selectively, thus, carry out ending the chimeric of recess or breaking away from, so that can stop at upper with respect to either party moving up and down of the left and right sides shank of machine spindle with respect to the upside of the 1st hooking sheet and the 2nd hooking sheet and downside card.
That is, shank is moved up and down, when its upper stopped, at the upper of shank, the 1st hooking sheet retreated towards shank holder inboard by switching device shifter, and the 1st hooking sheet ends the recess disengaging from the card of below.At this moment, actuating strut becomes rotation state freely, and the 2nd hooking sheet embeds the top card by the helical spring application of force and ends recess, so that shank stops at its upper.
In the sewing machine needle bar motion control device of in the public clear 55-34938 communique of above-mentioned reality, putting down in writing, the operating personnel who is good at the operation of crosspointer seam is when making corner portion, operate switching device shifter aptly while continuing to make, as mentioned above, a side moving up and down of shank stopped at its upper.But, when the operating personnel carries out the operation of switching device shifter under the situation of the high speed rotation of machine spindle, the translational speed of shank is fast, so the 2nd hooking sheet ends the engaging time delay (operating lag) that recess engages by the helical spring application of force and the card of upside, the card of top ends recess sometimes by the 2nd hooking sheet.Under this state, shank does not have to end with any 1 card of the 1st and the 2nd hooking sheet, promptly produces the problem that so-called shank is thrown off so exist shank to come off.
And, as mentioned above, under the situation that the generation shank comes off, during shank drives up and down, when the 1st hooking sheet and the card of upside end recess and engage, shank can only drive up and down with the height and position of decline actuating length part, and collide with needle plate repeatedly heavyly the bottom of shank, has problems such as shank bending, needle plate breakage.
Summary of the invention
The object of the present invention is to provide a kind of driving force transfer device that can prevent the Sewing machines of the so-called shank disengagement that shank comes off.
The driving force transfer device of two-needle sewing machine of the present invention, the driving force of main shaft is passed to the 2 parallel shanks that liftably are supported on the shank scaffold respectively individually, it is characterized in that, comprising: the upside and the downside card that are formed on each shank end recess with leaving predetermined distance up and down; Upside and downside card at each shank end the cannelure that forms on the recess; Axle is bearing in the described cannelure length direction middle part swingably, both ends have the bearing surface that can give prominence to block the actuating strut that upside and downside card end recess with selecting a property up and down by the pivot backing pin; The needle bar crank that is connected with described main shaft; Be connected, have the shank holder mechanism that to end the 1st hooking sheet that recess engages with the downside card of each shank, the 1st hooking sheet is locked in the locking mechanism of non-clamped position towards the 1st force application component of the engaging side application of force, with described the 1st hooking sheet with described needle bar crank; Be located at described shank scaffold, have can end the 2nd hooking sheet that recess engages with the upside card of each shank, with the shank card locking mechanism of the 2nd hooking sheet towards the 2nd force application component of the engaging side application of force; When described any one shank is in the top position of actuating length, carry out the operating mechanism that engaging that downside card with respect to its shank ends the 1st hooking sheet of recess is removed and the latch-release of described locking mechanism is used selectively; In the time of under each shank drops to respect to the lower position of the actuating length of shank scaffold a little, restriction is further moved, and prevents the anti-locking apparatus that comes off that comes off from the shank scaffold.
In the said structure, pass through operating mechanism, when locking mechanism is disengaged the lock-out state of the 1st hooking sheet, the 1st card ends member and ends recess by the 1st force application component with the downside card and engage, so the actuating strut that is installed in the cannelure is swung by the pivot backing pin, block the upside card by the bearing surface of upside and end recess, be equipped in the 2nd hooking sheet on the shank scaffold and can not end recess and engage with the upside card.This state is driven in rotation when main shaft down, and then the driving force of main shaft is passed to shank by the shank holder mechanism that is connected with needle bar crank, and shank up and down reciprocatingly drives with actuating length.
And when any 1 shank is in the top position of actuating length, pass through operating mechanism, the 1st hooking sheet ends engaging of recess with the downside card and is disengaged, when locking mechanism has formed lock-out state, ending recess by the 2nd hooking sheet of the 2nd force application component application of force with the upside card engages, the actuating strut that is installed in the cannelure is swung, and blocks the downside card by the bearing surface of downside and ends recess.Under this state, even main axis rotation drives, the driving force of main shaft can not pass to the shank of having removed with the 1st hooking sheet that engages yet, and shank is blocked only remains on its top position, is not driven up and down.
The occasion of when main shaft rotates at a high speed, operating mechanism being operated, the translational speed of shank is fast, the 2nd hooking sheet can't be followed the tracks of (operating lag), when shank is not ended by the 2nd hooking sheet card, 1st, any 1 of the 2nd hooking sheet is not supported shank, even so under the state that shank comes off from the shank scaffold, anti-locking apparatus can prevent that shank from coming off from the shank scaffold by coming off.
The simple declaration of accompanying drawing
Fig. 1 is the vertical profile front view of major part of horn portion of the two-needle sewing machine of expression one embodiment of the invention.
Fig. 2 is the left side view of the horn portion of expression two-needle sewing machine.
Fig. 3 is the front view of expression shank.
Fig. 4 is the exploded perspective view of expression shank holder.
Major part vertical profile side view when Fig. 5 A is the decline of expression shank.
Major part vertical profile side view when Fig. 5 B is the rising of expression shank.
Fig. 6 A is expression shank shank holder under the halted state major part vertical profile side view when descending that moves up and down.
Fig. 6 B is expression shank shank holder under the halted state major part vertical profile side view when rising that moves up and down
Fig. 7 is that expression prevents the shank major part vertical profile side view of hour hands bar cramp seat when moving up and down that come off.
Fig. 8 is the figure suitable with Fig. 5 A of expression change form.
Fig. 9 is the cross-sectional vertical view of the shank of presentation graphs 8.
Figure 10 is the major part enlarged drawing of other change forms of expression.
Figure 11 is the expression figure suitable with Fig. 2.
The specific embodiment
Embodiment
The driving force transfer device of the two-needle sewing machine of this example, to be ended the upper end that member is fixed in shank by card, thereby can prevent the case accident of shank, and, make up and down the distance between two engaging recessed parts bigger than the actuating length of shank, so that in-house the 1st hooking sheet of shank holder can not engage with the upside engaging recessed part, can prevent the breakage that shank and conflicting of needle plate cause reliably.
As shown in Figure 1, but in the horn portion 2 of the two-needle sewing machine 1 of eedle feeding, main shaft 4 sets to left and right direction, and this main shaft 4 is bearing on the machine frame 2A in the rotatable earth's axis in a plurality of positions.In the head 3 of horn portion 2, be provided with the front and see the shank scaffold 5 that is roughly the U font, this shank scaffold 5 is fixed in left and right directions and is provided on the left part of the swinging axle 6 in the horn portion 2, and is well-known, can be by swinging axle 6 (eedle feed direction) swing towards front and back.2 shank 7L, 7R about being provided with between the upper box 5a of this shank scaffold 5 and the lower box 5b, separating predetermined distance, the upper and lower of shank 7L, 7R can be bearing on upper box 5a and the lower box 5b respectively with moving up and down, and suture needle 8 is fixed on respectively on the bottom of this shank 7L, 7R removably.
Then, the driving force transfer device 11 that the driving force with main shaft 4 is passed to each shank 7L, 7R describes.This driving force transfer device 11 has: the upside and the downside card that are formed at each shank 7L, 7R end recess 7a, 7b (Fig. 3); Actuating strut 12L, 12R (Fig. 3, Fig. 5); The shank holder 13L of mechanism, 13R (Fig. 4); Shank card locking mechanism 14L, 14R (Fig. 5); Operating mechanism 15 (Fig. 1, Fig. 4) etc.Here, upside and downside card end recess 7a, 7b, actuating strut 12L, 12R, the shank holder 13L of mechanism, 13R and shank card locking mechanism 14L, 14R, for about shank 7L, 7R be same structure, so following shank 7L for the left side describes.
For the shank 7R on right side, the symbol that mark is identical on the identical member of member that the shank 7L to relevant left side describes also omits its explanation.But, put on symbol L for the mechanism of the shank 7L in left side or member and describe, use symbol R to describe mechanism and the member of the shank 7R on relevant right side.
As shown in Figure 4, shank holder 17 is to have respectively towards the block member of upper and lower to 2 through hole 17a that extend, and pairing left and right shank 7L, 7R insert and be embedded in these 2 through hole 17a, are adapted to be parallel to each other.As shown in Figure 1, an end of needle bar crank connecting rod 18 is connected with the right part of shank holder 17 rotationally, and the other end of this needle bar crank connecting rod 18 is connected with needle bar crank 19, and needle bar crank 19 is connected with main shaft 4.Therefore, shank holder 17 moves up and down by the rotation along with main shaft 4 of needle bar crank 19 and needle bar crank connecting rod 18, a pair of shank 7L, 7R by after the locking mechanism 27L, the 27R that chat synchronously pump with actuating length SS (with reference to Fig. 7).
With reference to Fig. 3 and Fig. 4, to upside and the downside card that is formed at shank 7L end recess 7a, 7b, the actuating strut 12L that is equipped on the shank 7L describes.Shank 7L forms roughly cylindric, and on this shank 7L, chamfering is extremely roughly implemented in the bottom in the end from it, forms the par 7c (with reference to Fig. 4) with Rack.The side sees that circular-arc breach is that the upside card ends recess 7a and the side sees that the downside card of rectangle ends recess 7b, is formed at the upper end (with reference to Fig. 3) of the par 7c of shank 7L with leaving predetermined distance L up and down.That is, upside and downside card end distance L between recess 7a, the 7b and are set at bigger than the actuating length SS of the above-below direction of shank 7L.
On the par 7c of shank 7L, be formed with arrive these upside cards end recess 7a and downside card end recess 7b downside, towards the pod 7d of longitudinal extension.This occasion, the pod 7d of shank 7L sets the length of regulation for, ends on the recess 7a so that the upper end extends to the upside card, and the bottom extends to the downside card and ends under the recess 7b.
Actuating strut 12 by board member constitutes is bearing in the pod 7d of shank 7L by 21 of pivot backing pins by the middle part with its length direction, rotates but be adapted to fore-and-aft direction.Two ends up and down at this actuating strut 12L form the bearing surface 12a and the 12b that can give prominence to respectively, and property ground stops up upside and the downside card ends recess 7a, 7b to select.
The sheet material bigger than the profile of shank 7L is packing ring 22L (it is equivalent to be blocked only member) is fixed on shank 7L by screw 23L upper end.Therefore, further moving towards the below from shank scaffold 5 of shank 7L limited by this packing ring 22L, and (in the present embodiment, be made of packing ring 22L and shank scaffold 5 prevent the mechanism that comes off) can not come off.
Then, with reference to Fig. 4, the shank holder 13L of mechanism that is connected with the needle bar crank 19 that is connected in main shaft 4 is described.The shank holder 13L of mechanism comprises: can end the 1st hooking sheet 25L that recess 7b engages with the downside card of shank 7L; With the 1st helical spring 26L (this be equivalent to 1st force application component) of the 1st hooking sheet 25L towards the engaging side application of force; The 1st hooking sheet 25L is locked in the locking mechanism 27L of non-clamped position.
The 1st hooking sheet 25L forms cylindric, and its front end forms cylindric portion, and the fulcrum post 28L of level is fixed on this cylindric.The 1st hooking sheet 25L can embed in the accepting hole 17b of the fore-and-aft direction that is formed on the shank holder 17 movably forward and backward.Therefore, end recess 7b card and end by the 1st hooking sheet 25L and a pair of card up and down being ended downside card among recess 7a, the 7b, shank holder 17 is connected with shank 7L, and the driving force of main shaft 4 obtains transmission.
Then, locking mechanism 27L is described.The side sees that the swing arm 31L of L font is supported on shank holder 17 by the pivot backing pin 32 rotatable earth's axis, and its bottom is formed with slotted hole 31a, and fulcrum post 28L inserts in logical this slotted hole 31a.The 1st helical spring 26L is housed in the cylindric recess 17c that becomes towards the upper and lower synform on shank holder 17 tops, the 1st helical spring 26L engages with the rearward end of swing arm 31L, swing arm 31L is rotated in Fig. 4, Fig. 5 toward the clockwise direction, apply elastic force so that the 1st hooking sheet 25L is fastened on the downside card all the time ends in the recess 7b.
Be provided in the card stopping bar 33L of the downside of the 1st hooking sheet 25L, be bearing on the shank holder 17 by the rotatable earth's axis of pivot backing pin 34L at its base end part.Rearward end at the vertical arm 33a that blocks stopping bar 33L is formed with only hook 33b of card.By after the operation of the operating mechanism 15 chatted, the elastic force that swing arm 31L overcomes the 1st helical spring 26L is when counterclockwise rotating, the 1st hooking sheet 25L moves towards the place ahead by fulcrum post 28L, ends recess 25a card only (with reference to Fig. 6 A) so card ends hook 33b with the card that is formed at the bottom of the 1st hooking sheet 25L.Its result, the 1st hooking sheet 25L and downside card end engaging of recess 7b and are disengaged and are locked in non-clamped position.
On card stopping bar 33L, vertical arm 33a that engages with fulcrum post 28L from the front side and the horizontal arm section 33c that extends towards horizontal direction form.And, between card stopping bar 33 and shank holder 17, be provided with the 2nd helical spring 35L, block stopping bar 33L and obtain among Fig. 4, Fig. 5 A application of force of rotatory force toward the clockwise direction.
The horizontal arm section 33c of left side card stopping bar 33L extends to the position near the horizontal arm section 33c of the card stopping bar 33R on right side.Remove pin 36 and can be arranged in the pin-and-hole 17d of shank holder 17 with moving up and down, be provided with the compression helical spring 38 of extremely faint power between this releasings pin 36 and the packing ring 37 that is fixed in shank holder 17,36 pressing forces that are subjected to are all the time down sold in releasing.This bottom of removing pin 36 is to extend with the form of the impartial butt in joint portion of two horizontal arm section 33c.
Then, with reference to Fig. 5 A, Fig. 5 B, Fig. 6 A and Fig. 6 B near the shank card locking mechanism 14L that shank 7L card is only remained on its upper is described.On the upper box 5a of shank scaffold 5, form towards front and back to through hole 5c, the 2nd hooking sheet 41L can be supported in this through hole 5c movably forward and backward.And the inside of the 2nd hooking sheet 41L embeds compression helical spring 42L (this is equivalent to the 2nd force application component), and the rear end of this compression helical spring 42L has been subjected to position limit by the closure plate 44 that is fixedly connected on by screw on the upper box 5a.
Therefore, the 2nd hooking sheet 41L utilizes the elastic force of compression helical spring 42L to be subjected to all the time and the elastic force-applying that engages in the upside card ends recess 7a.That is, when the 2nd hooking sheet 41L and upside card end recess 7a and engage, shank 7L and shank holder 17 drive roughly upper (with reference to Fig. 6 A, Fig. 6 B) that irrespectively temporary transient card only remains on its actuating length SS up and down.
As mentioned above, when the 1st hooking sheet 25L and downside card ended recess 7b and engage, shown in Fig. 5 A, the downside bearing surface 12b of actuating strut 12L was pushed to the rear, and it is outstanding that upper side abuts face 12a ends recess 7a towards the upside card.Therefore, what can stop the 2nd hooking sheet 41L reliably ends the engaging of recess 7a to the upside card, and the application of force of the 1st hooking sheet 25L by the 1st helical spring 26L engages and remain on the downside card and end in the recess 7b.
On the other hand, as shown in Figure 6A, when the upside card ended recess 7a and engages, the upper side abuts face 12a of actuating strut 12L was pushed to the rear to the 2nd hooking sheet 41L by the application of force of compression helical spring 42L, and it is outstanding that downside bearing surface 12b ends recess 7b to the downside card.Therefore, can stop reliably that the 1st hooking sheet 25L's end the engaging of recess 7b to the downside card.This occasion, the elastic force of the 2nd hooking sheet 41L by compression helical spring 42L engage and remain on the upside card and end in the recess 7a.
Then, when being in actuating length SS upper as shank 7L shown in Figure 7, being used for carrying out selectively the operating mechanism 15 that downside card with respect to this shank 7L ends the latch-release of the engaging releasing of the 1st hooking sheet 25L of recess 7b and locking mechanism 27L and describing.
Be formed with the supporting recess (not shown) of level at the downside upper box 5a nearby of the shank card locking mechanism 14L that is located at described shank scaffold 5, as Fig. 1, shown in Figure 4, slide 46 is housed in the supporting recess slidably, utilization is fixed in the cover plate 48 of shank scaffold 5 by Screw 47, can prevent the disengaging of slide 46.The right part of slide 46 form towards below outstanding action projection 46a.
This occasion, as shown in Figure 4, slide 46 is according to the operation by the switching device shifter (not shown) of operating personnel's operation, can transmit position (by the solid line diagram), shank engaging that action projection 46a is corresponding with the swing arm 31L in left side corresponding to the driving force of removing pin 36 at action projection 46a and remove the corresponding right shank of position (by the double dot dash line diagram in left side), action projection 46a and the swing arm 31R on right side and engage switching aptly on 3 positions of releasing position (double dot dash line on right side illustrates).
Promptly, operation by switching device shifter, in case be switched to the action projection 46a of the slide 46 left shank engaging releasing position corresponding with the swing arm 31L in left side, then when shank holder 17 rises to the upper of actuating length SS, by action projection 46a the swing arm 31L in left side is pushed towards the below, so swing arm 31L is towards counterclockwise rotating.Therefore, the 1st hooking sheet 25L engaging that ends recess 7b with respect to the downside card by the application of force of the 1st helical spring 26L obtains removing.
On the other hand, operation by switching device shifter, in case be switched to the action projection 46a driving force transmission positions corresponding with removing pin 36, then when shank holder 17 rises to the upper of actuating length SS, to remove by action projection 46a and to sell 36 and push towards the below, locking on the non-clamped position that forms so the card by card stopping bar 33L of the 1st hooking sheet 25L ends hook portion 33b obtains removing, that is, the locking of locking mechanism 27L is disengaged.Therefore, the 1st hooking sheet 25L ends recess 7b by the application of force of the 1st helical spring 26L with the downside card and engages.But, the switching of slide 46 being carried out by the operation of switching device shifter can be carried out when shank 7L is in actuating length SS upper selectively.
Then, the effect to the driving force transfer device 11 of structure like this describes.As mentioned above, in the operation by switching device shifter, switch to the occasion of the action projection 46a driving force transmission position corresponding with removing pin 36, when shank holder 17 rises to the upper of actuating length SS, remove pin 36 by towards the below pushing, card end hook portion 33b and card only recess 25a engage releasing.Thus, about 1 pair swing arm 31L, the 31R application of force by the 1st helical spring 26L, 26R, in Fig. 5 A, rotate toward the clockwise direction simultaneously, about two the 1st hooking sheet 25L, 25R with the locking mechanism 27L on the non-clamped position, the latch-release of 27R, end recess 7b, 7b engaging with the downside card of corresponding shank 7L, 7R respectively simultaneously.
Like this, end the state lower main axis 4 of recess 7b, 7b engaging in case rotation at corresponding with two the 1st hooking sheet 25L, 25R respectively downside card, then the rotary driving force of main shaft 4 is passed to two shank 7L, 7R by needle bar crank 19, needle bar crank connecting rod 18, shank holder the 17, the 1st hooking sheet 25L, 25R, and two shank 7L, 7R are synchronously driven up and down in actuating length SS.Thereby carry out the crosspointer sewing.
That is, when shank holder 17 be lowered by be urged to the most the next, then shown in Fig. 5 A, shank 7L, 7R drop to the lower position of actuating length SS, and be urged to upper when shank holder 17 rises, then shown in Fig. 5 B, shank 7L, 7R rise to the upper limit position of actuating length SS.Here, even shank 7L, 7R drop to the occasion of the lower position of actuating length SS, the upper end of shank 7L, 7R is also side-prominent up from shank scaffold 5 a little, so when making, the packing ring 22L, the 22R that are individually fixed in the upper end of shank 7L, 7R can not conflict with shank scaffold 5.
Like this, under the driving condition that two shank 7L, 7R are up and down reciprocatingly driven, the downside bearing surface 12b of the pairing actuating strut 12L of the 1st hooking sheet 25L, 25R, 12R is pushed towards the rear, so actuating strut 12L, 12R rotate in Fig. 5 A, Fig. 5 B toward the clockwise direction around pivot backing pin 21, it is outstanding that upper side abuts face 12a ends recess 7a to the upside card.Thus, can prevent that the 2nd hooking sheet 41L, 41R and upside card from ending recess 7a, 7b and engaging.
Here, shank 7L, the 7R that interrupts either party for example during the driving up and down of the shank 7L in left side, by the operation of switching device shifter, switches to its action projection 46a left shank engaging releasing position corresponding with the swing arm 31L in left side with slide 46.This occasion, as mentioned above, when the rotation of shank holder 17 by main shaft 4 rose to upper, action projection 46a pushed swing arm 31L towards the below.Thus, this swing arm 31L overcomes the application of force of the 1st helical spring 26L and rotates, and the engaging that the 1st hooking sheet 25L ends recess 7b with respect to the downside card obtains removing, and simultaneously, is locked on the non-clamped position that engaging is disengaged by locking mechanism 27L.
At this moment, by the 1st hooking sheet 25L retreating to non-clamped position, actuating strut 12L becomes rotation state freely, so the 2nd hooking sheet 41L is by the application of force of compression helical spring 42L, ending recess 7a with the upside card of shank 7L engages, even as shown in Figure 6A shank holder 17 drop to the most the next or shown in Fig. 6 B shank holder 17 rise to the occasion of upper, shank 7L also can block the top position that only remains on its actuating length SS, can not drive up and down.
The operation switching device shifter, will synchronously be driven up and down either party driving up and down of 2 shank 7L, 7R when interrupting, rotate the occasion that drives at a high speed at main shaft 4, the 2nd hooking sheet 41L (41R) ends the outstanding time delay that recess 7a engages by the elastic force of compression helical spring 42L with the upside card, and the upside card ends the downside that recess 7a passes through the 2nd hooking sheet 41L (41R) sometimes.This occasion, shank 7L (7R) can not ended recess 7a, 7b card by arbitrary card and end, so shank 7L (7R) frees and comes off from shank scaffold 5.
But, even shank 7L (7R) is when coming off like this, as shown in Figure 7, drop to the position under the lower position of actuating length SS a little at shank 7L (7R), shank 7L (7R) is fixed in packing ring 22L (22R) and shank scaffold 5 butts of the upper end of shank 7L (7R), so can not come off towards downside from shank scaffold 5.Therefore, the so-called shank in preventing from reliably to make is thrown off.
And, even in the occasion that prevents that as the method shank from throwing off, as shown in Figure 7, upside and downside card end recess 7a, distance L between the 7b is also set greatlyyer than the actuating length SS of shank 7L (7R), and, packing ring 22L (22R) is ended by shank scaffold 5 cards, the downside card end recess 7b and the lower position of actuating length roughly corresponding (in the present embodiment, the downside card end recess 7b be in actuating length the lower position slightly down) under the state, the upside card of shank 7L (7R) ends the position on the 1st hooking sheet 25L (25R) at upper limit position place that recess 7a is positioned at actuating length SS, even so under the situation that shank holder 17 drives up and down at a high speed with actuating length SS, the 1st hooking sheet 25L (25R) of shank holder 17 also can never end recess 7a with the upside card and engage.
Thus, can prevent reliably such in the past, engage the bottom that makes shank 7L (7R) and repeat and the needle plate 10 of pedestal part 9 such accident of conflicting heavily because of a certain reason the 1st hooking sheet 25L L (25R) and upside card end recess 7a, can avoid the breakage of shank 7L (7R) and needle plate 10 etc. reliably.
Each packing ring 22L, the 22R that are made of sheet material are fixed on the upper end of shank 7L, 7R by screw 23L, 23R, so as long as small-sized and cheap packing ring 22L, 22R are fixed on shank 7L, the 7R, just can realize preventing coming off of shank 7L, 7R.
The distance L that upside and downside card end between recess 7a, the 7b is set greatlyyer than the actuating length SS of shank 7L, 7R.Thus, packing ring 22L, 22R are by under the shank scaffold 5 cards state only, the upside card of each shank 7L, 7R ends the position on the 1st hooking sheet 25L, the 25R at upper limit position place that recess 7a is positioned at actuating length SS, so make in the driving up and down of shank holder mechanism 13 in the driving force of utilizing main shaft 4, can avoid the 1st hooking sheet 25L, 25R to end engaging of recess 7a reliably with the upside card.Thus, can prevent the bottom of shank 7L, 7R and conflicting of needle plate, prevent the breakage of shank 7L, 7R and needle plate reliably.
Then the change form to above-mentioned example describes.
Also can be in the upper end of each shank 7L, 7R, replacing packing ring 22 ground, will lamellar or small-sized bulk etc. various only member and shank 7L, 7R be integrally formed by card.
As Fig. 8, shown in Figure 9, also desirable advance (shenglvehao)for another circle 22 ground will embed in the endless groove 7e that is formed at respectively on shank 7L, the 7R from the E ring 50 (these are equivalent to be blocked only member) of the lower box 5b butt of upside and shank scaffold 5.Thus, the position under the lower position that drops to actuating length SS a little keeps shank 7L, 7R, and this occasion is that E ring 50 just can obtain the effect identical with described embodiment as long as use is simply ended member by card also.Except the E ring, also C ring or the structure of cross screw etc. is set with respect to shank 7L, 7R.
Also can on any part of clog- free shank 7L, 7R to the driving force propagation function, form card and end recess, at shank 7L, 7R during from height and position that shank scaffold 5 comes off such, to be equipped in the inside of shank scaffold 5 and be engaged by the engaging recessed part of spring energized engagement pin with shank 7L, 7R, with the formation anti-locking mechanism that comes off, thereby prevent shank 7L, 7R coming off from shank scaffold 5.
The packing ring 22 of the upper end by being located at shank 7L, 7R ends with shank scaffold 5 cards, prevent that shank 7L, 7R from coming off from shank scaffold 5, but beyond shank scaffold 5, also can only end member by the various cards of being located on the Sewing machines machine frame 2A with shank 7L card.For example, as Figure 10, shown in Figure 11, constitute on the machine frame 2A of rear side that the vertical wall 51a of portion that the shank card of a part of seeing that general curved forms the machine frame 2A of horizontal L font in the side ends plate 51 is fixed in horn portion 2.This shank card ends the horizontal walls 51b of plate 51, and the direction at the upside height and position place nearby of the upper end of the upper box 5a of shank scaffold 5 towards shank 7L, 7R is the place ahead horizontal-extending, forms pairing left and right notch part 51c respectively at leading section.The left and right directions width of these notch parts 51c than the diameter dimension of shank 7L, 7R a little more greatly, shank 7L, 7R can be supported on the inboard of corresponding notch part 51c respectively up or down.And same as the previously described embodiments, packing ring 22L, 22R are separately fixed at the upper end of each shank 7L, 7R by screw 23L, 23R.This occasion is ended plate 51 (machine frame 2A) and packing ring 22L, 22R by the shank card and is constituted the anti-locking mechanism that comes off.
Therefore, same as the previously described embodiments, even the some of shank 7L, 7R freed and the occasion that comes off towards the below from shank scaffold 5 in making, when shank 7L, 7R drop under the lower position of actuating length SS a little, the packing ring 22L, the 22R that are fixed on the upper end of shank 7L, 7R end plate 51 butts from upside and shank card, so can prevent shank 7L, 7R coming off from shank scaffold 5.
In the said structure, be by being located at shank 7L, the packing ring 22L of 7R, 22R or E ring 50 and shank scaffold 5 or Sewing machines machine frame 2A (the shank card ends plate 51) constitute the anti-locking mechanism that comes off, but also can for example be provided with shank 7L, the sensor that comes off and detect of 7R, and setting is worked as this sensor to shank 7L, when 7R comes off with shank 7L, 7R keeps the shank holding device to prevent that it from coming off, in a word, as long as be provided with the anti-locking apparatus that comes off, so that each shank 7L, 7R drops to respect under the lower position of the actuating length of shank scaffold 5 time a little, restriction is further moved, and prevents coming off from shank scaffold 5.
The present invention is not limited to the example of above explanation, and the professional and technical personnel can carry out various changes to the foregoing description and implement in the scope that does not break away from aim of the present invention, and the present invention also comprises these change forms.
Claims (5)
1. the driving force transfer device of a two-needle sewing machine passes to the 2 parallel shanks that liftably are supported on the shank scaffold respectively individually with the driving force of main shaft, it is characterized in that, comprising:
The upside and the downside card that are formed on each shank end recess with leaving predetermined distance up and down;
Upside and downside card at each shank end the cannelure that forms on the recess;
Axle is bearing in the described cannelure length direction middle part swingably, both ends have the bearing surface that can give prominence to block the actuating strut that upside and downside card end recess with selecting a property up and down by the pivot backing pin;
The needle bar crank that is connected with described main shaft;
Be connected, have the shank holder mechanism that to end the 1st hooking sheet that recess engages with the downside card of each shank, the 1st hooking sheet is locked in the locking mechanism of non-clamped position towards the 1st force application component of the engaging side application of force, with described the 1st hooking sheet with described needle bar crank;
Be located at described shank scaffold, have can end the 2nd hooking sheet that recess engages with the upside card of each shank, with the shank card locking mechanism of the 2nd hooking sheet towards the 2nd force application component of the engaging side application of force;
When described any one shank is in the top position of actuating length, carry out the operating mechanism that engaging that downside card with respect to its shank ends the 1st hooking sheet of recess is removed and the latch-release of described locking mechanism is used selectively;
In the time of under each shank drops to respect to the lower position of the actuating length of shank scaffold a little, restriction is further moved, and prevents the anti-locking apparatus that comes off that comes off from the shank scaffold.
2. the driving force transfer device of two-needle sewing machine as claimed in claim 1 is characterized in that, the distance that described upside and downside card end between the recess is set greatlyyer than the actuating length of described shank.
3. the driving force transfer device of two-needle sewing machine as claimed in claim 1 is characterized in that,
The described anti-locking apparatus that comes off is by being located at being ended member by card and it is blocked shank scaffold or the Sewing machines machine frame that member card only ends and constituting of shank,
Describedly ended under the state that member ends by shank scaffold or Sewing machines machine frame card by card, the upside card of described each shank ends the top position of described the 1st hooking sheet that recess is positioned at the upper limit position place of actuating length.
4. the driving force transfer device of two-needle sewing machine as claimed in claim 2 is characterized in that, the described anti-locking apparatus that comes off is by being located at being ended member by card and it is blocked shank scaffold or the Sewing machines machine frame that member card only ends and constituting of shank,
Describedly ended under the state that member ends by shank scaffold or Sewing machines machine frame card by card, the upside card of described each shank ends the top position of described the 1st hooking sheet that recess is positioned at the upper limit position place of actuating length.
5. as the driving force transfer device of claim 3 or 4 described two-needle sewing machines, it is characterized in that, describedly ended member by card and constitute by the sheet material that is fixed on the shank upper end.
Applications Claiming Priority (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2004257468 | 2004-09-03 | ||
| JP2004-257468 | 2004-09-03 | ||
| JP2004257468 | 2004-09-03 | ||
| JP2005189530A JP2006095271A (en) | 2004-09-03 | 2005-06-29 | Driving force transmission device for twin-needle sewing machine |
| JP2005-189530 | 2005-06-29 |
Related Child Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010102345516A Division CN101914840B (en) | 2004-09-03 | 2005-09-02 | Drive force transmission device of double-needle sewing machine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1743531A true CN1743531A (en) | 2006-03-08 |
| CN1743531B CN1743531B (en) | 2011-06-08 |
Family
ID=36235627
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200510099836 Expired - Fee Related CN1743531B (en) | 2004-09-03 | 2005-09-02 | Drive force transmission device of double-needle sewing machine |
| CN2010102345516A Expired - Fee Related CN101914840B (en) | 2004-09-03 | 2005-09-02 | Drive force transmission device of double-needle sewing machine |
Family Applications After (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010102345516A Expired - Fee Related CN101914840B (en) | 2004-09-03 | 2005-09-02 | Drive force transmission device of double-needle sewing machine |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP2006095271A (en) |
| CN (2) | CN1743531B (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102080311A (en) * | 2009-11-27 | 2011-06-01 | Juki株式会社 | Sewing machine |
| CN102182020A (en) * | 2011-05-04 | 2011-09-14 | 张章生 | Needle bar oscillating transmission mechanism for eyelet button hole sewing machine |
| CN101353849B (en) * | 2007-07-26 | 2013-04-24 | Juki株式会社 | Double needle sewing machine |
| CN101377039B (en) * | 2007-08-29 | 2013-06-05 | Juki株式会社 | Sewing machine |
| CN103173942A (en) * | 2011-12-26 | 2013-06-26 | Juki株式会社 | Sewing machine |
| CN105696214A (en) * | 2016-03-08 | 2016-06-22 | 常州智谷机电科技有限公司 | Double-color switching mechanism |
| CN108823821A (en) * | 2018-06-28 | 2018-11-16 | 临泉县双狐皮件加工有限公司 | A kind of single, double needle switching mechanism of leatherware processing |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006087578A (en) * | 2004-09-22 | 2006-04-06 | Juki Corp | Needlebar mechanism of double needle sewing machine |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CH326921A (en) * | 1954-03-29 | 1958-01-15 | Pfaff Ag G M | Two needle sewing machine with switchable needle bars |
| CH662376A5 (en) * | 1984-02-29 | 1987-09-30 | Gegauf Fritz Ag | ALTERNATING PRESSER FOOT. |
| US6305304B1 (en) * | 1997-11-25 | 2001-10-23 | Juki Corporation | Two-needle sewing machine |
| CN2410481Y (en) * | 1999-12-17 | 2000-12-13 | 曾庆东 | Internal spring type spacing mechanism |
-
2005
- 2005-06-29 JP JP2005189530A patent/JP2006095271A/en active Pending
- 2005-09-02 CN CN 200510099836 patent/CN1743531B/en not_active Expired - Fee Related
- 2005-09-02 CN CN2010102345516A patent/CN101914840B/en not_active Expired - Fee Related
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101353849B (en) * | 2007-07-26 | 2013-04-24 | Juki株式会社 | Double needle sewing machine |
| CN101377039B (en) * | 2007-08-29 | 2013-06-05 | Juki株式会社 | Sewing machine |
| CN102080311A (en) * | 2009-11-27 | 2011-06-01 | Juki株式会社 | Sewing machine |
| CN102080311B (en) * | 2009-11-27 | 2014-03-19 | Juki株式会社 | Sewing machine |
| CN102182020A (en) * | 2011-05-04 | 2011-09-14 | 张章生 | Needle bar oscillating transmission mechanism for eyelet button hole sewing machine |
| CN103173942A (en) * | 2011-12-26 | 2013-06-26 | Juki株式会社 | Sewing machine |
| CN103173942B (en) * | 2011-12-26 | 2016-03-16 | Juki株式会社 | Sewing machines |
| CN105696214A (en) * | 2016-03-08 | 2016-06-22 | 常州智谷机电科技有限公司 | Double-color switching mechanism |
| CN108823821A (en) * | 2018-06-28 | 2018-11-16 | 临泉县双狐皮件加工有限公司 | A kind of single, double needle switching mechanism of leatherware processing |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101914840B (en) | 2012-10-10 |
| JP2006095271A (en) | 2006-04-13 |
| CN101914840A (en) | 2010-12-15 |
| CN1743531B (en) | 2011-06-08 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN1743531A (en) | Drive force transmission device of double-needle sewing machine | |
| CN1926275A (en) | Sequin feeder | |
| JPH10263971A (en) | Tool replacement device for machine tool | |
| CN101037832A (en) | Feeding device for pattern sewing machine | |
| CN1109787C (en) | Multineedle sewing machine | |
| US4485752A (en) | Adjustable needle bar crank drive | |
| CN1904181A (en) | Keyhole sartorius | |
| CN1869308A (en) | Curved needle seat of buttonhole sewing machine | |
| CN1800476A (en) | Inserting strip sewing machine | |
| CN1053939C (en) | Sewing machine | |
| CN1904180A (en) | Cloth-feeding device for seamer | |
| CN1247848C (en) | Feeding table driving device of buttonhole sewing machine | |
| CN1861884B (en) | Cloth pressing device for sewing machine | |
| CN1827891A (en) | Sewing machine and feeding adjusting mechanism thereof | |
| CN113604991B (en) | Independent carving hole device and embroidery machine of convenient switching | |
| CN1796633A (en) | Feeding regulating device of sewing machine | |
| CN213804264U (en) | Feed dog subassembly of disconnect-type sewing machine | |
| CN112663240A (en) | Push rod structure of upper thread clamping device and upper thread clamping device of embroidery machine | |
| CN214193678U (en) | Feed dog subassembly of disconnect-type sewing machine | |
| CN1955355A (en) | Double-needle sewing machine | |
| CN1170971C (en) | Sewing machine | |
| CN101037833A (en) | Feeding device for pattern sewing machine | |
| CN1811039A (en) | Apparatus for severing thread | |
| CN113604993A (en) | Independent carving device with carving clutch and embroidery machine | |
| CN214422884U (en) | Embroidery machine's aircraft nose and embroidery machine |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110608 Termination date: 20200902 |