CN101597842B - Needle bar reciprocating mechanism of sewing machine - Google Patents
Needle bar reciprocating mechanism of sewing machine Download PDFInfo
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- CN101597842B CN101597842B CN 200910142167 CN200910142167A CN101597842B CN 101597842 B CN101597842 B CN 101597842B CN 200910142167 CN200910142167 CN 200910142167 CN 200910142167 A CN200910142167 A CN 200910142167A CN 101597842 B CN101597842 B CN 101597842B
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Abstract
The invention provides a needle bar reciprocating mechanism of a sewing machine, capable of adjusting strokes of the needle bar. The mechanism comprises a first double armed crank to obtain power from an electric motor of the sewing machine and rotate around a support shaft; a first transmission connecting bar, connected with the first double armed crank; a second transmission connecting bar, located between the first transmission connecting bar and the needle bar side; a second double armed crank, connected with the first or the second transmission connecting bar and drive a connecting point to move; and an actuator, connected with the other end of the second double armed crank, comprising an output part that can move at a primary position and a forward position and enable the connecting point to move at overlapped position with the support shaft of the first double armed crank and at separated position, and comprising an adjusting motor that can be connected with a first limit stop resisted against the output part of the second double armed crank or the actuator, and adjust the forward position of the output part of the actuator, thus adjust the separated position of the connecting point to adjust strokes of the needle bar.
Description
Technical field
The present invention relates to a kind of needle bar reciprocating mechanism that can regulate the Sewing machines of needle bar stroke.
Background technology
At present, as common have can switch the Sewing machines that pin moves up and down the needle bar reciprocating mechanism of state and pin halted state, in known for example patent documentation 1 record Sewing machines.According to Fig. 7 and Fig. 8, the needle bar reciprocating mechanism of this Sewing machines is described.
This needle bar reciprocating mechanism 100 has: main shaft 101, and it utilizes sewing machine electromotor to be rotated; Eccentric cam 102, it is fixedly mounted on main shaft 101; Eccentric ratio 103, it is section's setting-up eccentricity cam 102 at one end; The first bell crank 104, it rotates wrist 104a with first and eccentric ratio 103 links; First transmits connecting rod 106, and second of one end and the first bell crank 104 rotates wrist 104b and link; Second transmits connecting rod 107, and the other end that connecting rod 106 is transmitted in one end and first links; Slave arm 108, itself and second the other end of transmitting connecting rod 107 link; Reciprocating rotary moving axis 109, its fixed support slave arm 108; Master arm 113, it is fixedly supported on turning cylinder 109; Small rod 114, its pivoting end and needle bar 130 with master arm 113 links, and allows horizontal displacement; The second bell crank 110, its first rotation wrist 110a and o 120 link; And connecting rod 112, it links the point of contact 111 that second of the second bell crank 110 rotates between wrist 110b and aforementioned the first transmission connecting rod 106 and the second transmission connecting rod 107.
When usually making, as shown in Figure 7, if main shaft 101 carries out all-round rotation, bell crank 104 swings, second of bell crank 104 rotates the displacement of the above-below direction of wrist 104b, be passed to slave arm 108, via reciprocating rotary moving axis 109, master arm 113, small rod 114, needle bar 130 moves up and down with roughly remaining unchanged.
On the other hand, in the situation that moving up and down of needle bar stopped, as shown in Figure 8, o 120 moves to shrinkage direction, the second bell crank 110 is counterclockwise rotated to diagram, via connecting rod 112, make the first point of contact 111 that transmits between connecting rod 106 and the second transmission connecting rod 107 move to the position concentric with the swinging support axle 105 of the first bell crank 104.Thus, even by the all-round rotation of main shaft 101, the first bell crank 104 is swung, first transmits connecting rod 106 also can swing centered by point of contact 111, and second transmits connecting rod 107 becomes the state of being failure to actuate fully.
Patent documentation 1: the JP 2003-326055 of Japan communique
Summary of the invention
But, although above-mentioned existing needle bar reciprocating mechanism 100 can switch the driving of needle bar and stop, must carrying out the problems such as part replacement when having the needle bar stroke adjustment.Therefore, usually make stroke keep fixing and make, but due to easy slip, the thickness of making thing or the various conditions such as wire size (kind) of reaching the standard grade, and in the situation that the rising of suture needle when conversion the upper wire loop that forms size change, it can't be adjusted into suitably, thereby exist the tip of still to catch wire loop and the problem of poor stitching quality occurs.
Especially, change for above-mentioned various conditions of making, because can't be easy to the stroke adjustment, so must prepare the different Sewing machines of needle bar stroke.
The object of the invention is, utilizes the simple structure that does not need to carry out part replacement to carry out the stroke adjustment up and down of needle bar, improves and makes the operating efficiency of operation.
the described invention of technical scheme 1 is a kind of needle bar reciprocating mechanism of Sewing machines, and it has: main shaft, and it utilizes sewing machine electromotor to be rotated, eccentric cam, it is fixedly mounted on aforementioned main shaft, the first bell crank, it is supported on framework, can freely rotate a distolateral and aforementioned eccentric cam side link centered by the pivot center parallel with aforementioned main shaft, first transmits connecting rod, distolateral and aforementioned the first bell crank link of one, second transmits connecting rod, and one is distolateral and aforementioned first transmit connecting rod and link, another distolateral and the link of needle bar side, the second bell crank, it is supported on framework, can freely rotate distolateral and aforementioned first a point of contact link of transmitting between connecting rod and the second transmission connecting rod centered by the pivot center parallel with aforementioned main shaft, and actuator, another distolateral link of itself and aforementioned the second bell crank, has the output block that can move to initial position and progressive position, the needle bar reciprocating mechanism of this Sewing machines, output block by aforementioned actuator is to the movement of initial position or progressive position, make aforementioned first to transmit point of contact that connecting rod and second transmits connecting rod from position that the pivot center with aforementioned the first bell crank overlaps, move to the separation point position of separating with it, the spinning movement of aforementioned eccentric cam is transformed to reciprocating action, be passed to needle bar, it is characterized in that, also have: the 1st retainer, the output block butt of itself and aforementioned the second bell crank or aforementioned actuator, and regulating electric machine, it can link the 1st retainer with advancing and retreat, regulate initial position or the progressive position of the output block of aforementioned actuator, by regulated initial position or the progressive position of the output block of aforementioned actuator by aforementioned regulating electric machine, regulate aforementioned first and transmit connecting rod and the second aforementioned separation point position of transmitting the point of contact of connecting rod, thereby regulate the needle bar stroke.
The described invention of technical scheme 2 has the structure identical with the described invention of technical scheme 1, simultaneously, it is characterized in that, have: detecting unit, it detects the aforementioned first angle variable quantity that transmits the amount of movement of connecting rod and the point of contact of the second transmission connecting rod or follow some parts that point of contact moves; And control module, aforementioned regulating electric machine is controlled in its output according to aforementioned detecting unit, to become the needle bar stroke of target.
the described invention of technical scheme 3 is a kind of needle bar reciprocating mechanism of Sewing machines, and it has: main shaft, and it utilizes sewing machine electromotor to be rotated, eccentric cam, it is fixedly mounted on aforementioned main shaft, the first bell crank, it is supported on framework, can freely rotate a distolateral and aforementioned eccentric cam side link centered by the pivot center parallel with aforementioned main shaft, first transmits connecting rod, distolateral and aforementioned the first bell crank link of one, second transmits connecting rod, and one is distolateral and aforementioned first transmit connecting rod and link, another distolateral and the link of needle bar side, and regulating connecting rod, it is supported for, can freely rotate centered by back shaft, one distolateral and the aforementioned first point of contact link of transmitting connecting rod and the second transmission connecting rod, can make aforementioned first to transmit the point of contact that connecting rod and second transmits connecting rod, move in interior moving range comprising the position that overlaps with the pivot center of aforementioned the first bell crank, the needle bar reciprocating mechanism of this Sewing machines, the spinning movement of aforementioned eccentric cam is transformed to reciprocating action, be passed to needle bar, it is characterized in that, also has the regulating electric machine, it rotates aforementioned regulating connecting rod, regulate aforementioned first by aforementioned regulating electric machine and transmit the moving range that connecting rod and second transmits the point of contact of connecting rod, thereby regulate the needle bar stroke.
The described invention of technical scheme 4 has the structure identical with the described invention of technical scheme 3, it is characterized in that, have: detecting unit, it detects the aforementioned first angle variable quantity that transmits the amount of movement of connecting rod and the point of contact of the second transmission connecting rod or follow some parts that point of contact moves; And control module, aforementioned regulating electric machine is controlled in its output according to aforementioned detecting unit, to become the needle bar stroke of target.
The effect of invention
The described invention of technical scheme 1, can utilize actuator with the position of the point of contact of two connecting rod bodies, switch to the position and the separation point position of separating with it that overlap with the pivot center of the first bell crank, aforementioned two connecting rod bodies will be passed to needle bar via the reciprocating action of the first bell crank conversion from eccentric cam.At this moment, when becoming in the position of point of contact the position that overlaps with the pivot center of the first bell crank, become the state that reciprocating action can't be passed to the needle bar side, when becoming the separation point position in the position of point of contact, stroke with corresponding with this separating distance is passed to the needle bar side with reciprocating action.
And because above-mentioned separating distance can be adjusted by utilizing the regulating electric machine that the first retainer advance and retreat are moved, what is called can utilize the regulating electric machine to regulate the needle bar stroke as its result.Therefore, do not need to carry out part replacement when the needle bar stroke adjustment, even in the course of action of needle bar, can easily carry out stroke adjustment yet.
In addition, in the situation that the various conditions such as easy slip, the thickness of thing or the wire size of reaching the standard grade of making change, also can change accordingly the needle bar stroke with it rapidly, especially, because also can be corresponding with it in the situation that the fabric thickness variation occurs in making process, so can effectively avoid catching the wrong poor stitching quality that causes by the wire loop of still, realize the raising of quality of sewing.
the described invention of technical scheme 3, because can comprise the position that overlaps with the pivot center of the first bell crank in interior scope, mobile adjusting will be passed to from eccentric cam the point of contact of two connecting rod bodies of needle bar via the reciprocating action of the first bell crank conversion, so when the point of contact position becomes the position that overlaps with the pivot center of the first bell crank, become the state that reciprocating action can't be passed to the needle bar side, when becoming the position of separating from here in the position of point of contact, can reciprocating action be passed to the needle bar side with the stroke corresponding with this separating distance.
And, because can adjust the above-mentioned separating distance of the point of contact of two connecting rod bodies by the driving of regulating electric machine, so do not need to carry out part replacement when the needle bar stroke adjustment, also can easily carry out stroke adjustment in the needle bar course of action.
In addition, because in the situation that the various conditions such as easy slip, the thickness of thing or the wire size of reaching the standard grade of making change, also change needle bar stroke corresponding with it rapidly, especially, also can be corresponding with it in the situation that the fabric thickness variation occurs in making process, so can effectively avoid catching the wrong poor stitching quality that causes by the wire loop of still, realize the raising of quality of sewing.
In addition, so-called " some parts " can be some in two connecting rod bodies, can be also other parts with their interlocks.
Description of drawings
Fig. 1 is the oblique view of wanting section as the needle bar reciprocating mechanism of the Sewing machines of the 1st embodiment of the present invention.
Fig. 2 is the profile of wanting section as the needle bar reciprocating mechanism of the Sewing machines of the 1st embodiment of the present invention.
Fig. 3 means the action specification figure of the integrally-built needle bar halted state of needle bar reciprocating mechanism.
Fig. 4 means the action specification figure of the integrally-built needle bar operating state of needle bar reciprocating mechanism.
Fig. 5 means the block diagram of the control system of Sewing machines.
Fig. 6 is in the 2nd embodiment of the present invention, the action specification figure of the integrally-built needle bar operating state of expression needle bar reciprocating mechanism.
Fig. 7 means the action specification figure of the integrally-built needle bar operating state of existing needle bar reciprocating mechanism.
Fig. 8 means the action specification figure of the integrally-built needle bar halted state of existing needle bar reciprocating mechanism.
The specific embodiment
(the 1st embodiment)
In Fig. 1 to Fig. 4, the needle bar reciprocating mechanism 10 of Sewing machines has: main shaft 1, and it utilizes sewing machine electromotor 3 to carry out all-round rotation; Mapping device 20, the spinning movement of its conversion main shaft 1, output reciprocating action; Transmission mechanism 30, it is passed to needle bar 3 with reciprocating action from mapping device 20; And as the stroke control mechanism 50 of mobile governor motion, it regulates the reciprocating stroke that transmission mechanism 30 transmits.
In addition, Sewing machines is two-needle sewing machine, because carry two needle bars 2, so above-mentioned needle bar reciprocating mechanism 10 has respectively two mapping devices 20, transmission mechanism 30 and stroke control mechanism 50, but because it is same configuration, so one of them only is described.
(mapping device)
(transmission mechanism)
Above-mentioned first transmits connecting rod 32 and second transmits connecting rod 33 and has following function: under state that two connecting rod general alignment are straight line or slight curving state, will be passed to slave arm 34 by the reciprocating action along circular arc that the first bell crank 31 applies.
And, has following tendency, namely, point of contact 38 between the first transmission connecting rod 32 and the second transmission connecting rod 33 is positioned at the position near the back shaft (pivot center) 39 of the first bell crank 31, the reciprocating action amount that is passed to slave arm 34 from the first bell crank 31 is less, if unanimously transmission capacity is 0.
(stroke control mechanism)
In addition, as previously mentioned, stroke control mechanism 50 is corresponding with two needle bars 2 and arrange two, but 70 of support frame 51 and control parts arrange one, are jointly used by two stroke control mechanisms 50.
The second bell crank 54 is fixedly supported on horizontally disposed back shaft 59 on support frame 51, and back shaft 59 can be supported rotatably with respect to support frame 51.
And the second bell crank 54 is centered by back shaft 59, and its first and second rotations wrist 54a, 54b extend to different directions respectively.
Second rotates wrist 54b extends to vertical direction roughly, and an end of its end and connecting rod 55 links, and transmission connecting rod 32,33 point of contact 38 are moved on general horizontal direction.
First rotates wrist 54a extends on general horizontal direction, and its end links with plunger (output block) as the o 52 of actuator.And, first rotates the 2nd retainer 57 that wrist 54a utilizes the moving body 56 of conduct the 1st retainer that is positioned at the top and is positioned at the below, restriction upper limit position (suitable with the progressive position of the plunger of o 52) and lower position (suitable with the initial position of the plunger of o 52) can be rotated between these two positions.And if make o 52 actions, the plunger of o 52 moves to initial position from progressive position.Follow the movement of this plunger, point of contact 38 moves between the position that overlaps with the back shaft 39 of the first bell crank and the separation point position (as shown in Figure 4) of separating with it.
In addition, the second bell crank 54 be bonded into, can rotate together with spring supporting wrist 61 via this back shaft 59.The pivoting end of this spring supporting wrist 61 is pressed to the first direction of rotating wrist 54a and moving body 56 butts of the second bell crank 54 by pressing spring 58 by aforementioned.That is to say, first of the second bell crank 54 rotates wrist 54a by (moving body 56) side pretension all the time upward.On the other hand, the pressing force of pressing spring 58 is pressed in o 52 opposings, and its plunger is to rotating with first the direction action that wrist 54a pulls to below (retainer 57) side.
Moving body 56 is thread spindles, and it has the opposite face 56a relative with the first rotation wrist 54a of the second bell crank 54 in the bottom, and it is supported with the state along vertical direction by support frame 51.In addition, support frame 51 is because utilize screwed hole to support moving body 56, so can by making moving body 56 rotations, opposite face 56a be moved up and down.
And first of the second bell crank 54 rotates wrist 54a, as previously mentioned, and all the time by pressing to moving body 56 sides by pressing spring 58.That is to say, in the situation that o 56 is failure to actuate, first rotates wrist 54a becomes state with the opposite face 56a crimping of moving body 56.Therefore, the rotation by moving body 56 is regulated, and can make and transmit connecting rod 32,33 point of contact 38 is positioned at the optional position.
The upper end of moving body 56 directly links via the output shaft of collar 53a and regulating electric machine 53, can utilize the driving of this regulating electric machine 53, the position adjustments of connecting rod 32,33 point of contact 38 is regulated and transmitted to the height that carries out opposite face 56a, and then can carry out the needle bar stroke adjustment by transmission mechanism 30.
(control system of Sewing machines)
The control part 70 of control and regulation motor 53 is also born the control of Sewing machines integral body.Here, the control system for Sewing machines describes according to Fig. 5.
In addition, control part 70 connects following equipment via not shown interface: speed probe 4, and its anglec of rotation and rotating speed to sewing machine electromotor 3 is counted; Guidance panel 72, it carries out the input of various settings; And the encoder 60,60 of each needle bar reciprocating mechanism 10, detection signal or set information according to these equipment carry out the control of above-mentioned each control object.
The encoder 60 of needle bar reciprocating mechanism 10 can detect via back shaft 59 rotational angle of the second bell crank 54.Can according to the prescribed function take the rotational angle of this second bell crank 54 as variable, calculate the reciprocal needle bar stroke of giving to needle bar 2.Control part 70 also can replace this functional operation and form is set, and it illustrates the detection rotational angle of the second bell crank 54 that is obtained by encoder 60 and the corresponding relation between the needle bar stroke.On the other hand, guidance panel 72 has the setting button, the value of the needle bar stroke that its setting operation person is desired, if carry out the setting input of needle bar stroke, control part 70 is with reference to aforementioned table, obtain the angle of the second suitable bell crank 54, carry out the driving of regulating electric machine 53, until the output of encoder 60 is consistent with the calculating angle.Thus, can be desired value with the needle bar Stroke Control.
In addition, when carrying out the making of known in advance tailoring pattern, control part 70 is carried out following actions and is controlled: monitor the pin numbers by the speed probe 4 that is arranged on sewing machine electromotor 3, with the pin number of prior setting, the needle bar stroke is carried out change and regulate.
In addition, the add-substract key of needle bar stroke is set on guidance panel 72, every operation is one of them key once, controls to make the second bell crank 54 rotate the minute angle of regulation, thereby can begin to regulate the needle bar stroke with the increase and decrease of small unit from currency.
(action of needle bar reciprocating mechanism)
Carry out the action specification of needle bar reciprocating mechanism 10.As previously mentioned, if carry out the setting value input of needle bar stroke from guidance panel 72, carry out regulating electric machine 53 by control part 70 and drive, moving body 56 rises or descends, and the second bell crank 54 that the spring 58 that is pressed is exerted pressure matches and rotates with the lifting of moving body 56.Thus, via connecting rod 55, transmit connecting rod 32,33 point of contact 38 moves.On the other hand, main shaft 1 utilizes sewing machine electromotor 3 to carry out all-round rotation, and mapping device 20 is transformed to the reciprocating rotation action with it, imposes on the first bell crank 31.Because when transmitting connecting rod 32,33 and transmit the reciprocating rotations action to slave arm 34, transmit connecting rod 32,33 point of contact 38 moves, so its reciprocating rotation angle changes at the first bell crank 31.Therefore, also change to the needle bar stroke that needle bar 2 applies via slave arm 34, reciprocating rotary moving axis 35, master arm 36, small rod 37, be adjusted to the value of expectation.
In addition, on guidance panel 72, for each needle bar 2, the needle bar shutdown switch is set respectively, if press this needle bar shutdown switch in the process of making, control part 70 is controlled the electromagnetic valve of the o 52 corresponding with that needle bar 2 that is instructed to stop, make o 52 action (making plunger move to initial position), the second bell crank 54 is furthered until with retainer 57 butts.Thus, transmit connecting rod 32,33 point of contact 38 moves to the position concentric with the back shaft 39 of the first bell crank 31, first transmits connecting rod 32 rotates centered by point of contact 38 (back shaft 39), simultaneously, second transmits connecting rod 33 keeps motionless, so can be to the needle bar side transferring power of the first bell crank 31, becoming is only the state that moving up and down of selected needle bar 2 stops.
(effect of needle bar reciprocating mechanism)
As mentioned above, needle bar reciprocating mechanism 10, regulate the needle bar strokes because utilize the regulating electric machine 53 that adjusting is moved in two positions of transmitting connecting rods 32,33 point of contact 38, so do not need to carry out part replacement, also can easily carry out stroke adjustment in the process of sewing machine electromotor 3 actions, aforementioned two are transmitted the reciprocating action that connecting rod transmits after conversion to needle bar 2, and their end links mutually.
In addition, because in the situation that the various conditions such as easy slip, the thickness of thing or the wire size of reaching the standard grade of making change, also can be fast corresponding with it and change the needle bar stroke, especially, in the situation that occuring in making process, fabric thickness changes, also can be corresponding with aforementioned condition, so can effectively avoid catching the wrong poor stitching quality that causes by the wire loop of still, realize that quality of sewing improves.
In addition, because utilize encoder 60, carry out the action control of regulating electric machine 53 while the rotational angle that monitors the second bell crank 54, so can make the target actuating quantity consistent with the actual act amount, can be adjusted to more exactly target needle bar stroke, aforementioned encoder 60 detects the rotational angle of following needle bar reciprocating mechanism 10, two to transmit the movement of connecting rod 32,33 point of contact 38 and the second bell crank 54 that angle changes occuring.
In addition, press pressing spring 58 with the second bell crank 54 to the direction pretension of moving body 56 butts.Therefore, in the situation that o 52 is failure to actuate, the plunger advanced position of o 52 moves, and the second bell crank 54 and moving body 56 butts utilizes and keep this state by the pretightning force of pressing spring 58.Therefore, can cut off the power supply of o 52 after the needle bar stroke adjustment, have energy-saving effect.
(the 2nd embodiment)
According to Fig. 6, the 2nd embodiment of the present invention is described.
In above-mentioned the 1st embodiment, for the adjustment of needle bar stroke, each needle bar 130 is arranged respectively o 52 and adjusts motor 53.Replace this mode, in the 2nd embodiment, for each needle bar 130, carry out the adjustment of needle bar stroke by a regulating electric machine 80 respectively.In the explanation of the 2nd embodiment, the structure mark identical label identical with the 1st embodiment, it describes omission in detail.
In the needle bar reciprocating mechanism 10A of the 2nd embodiment, replace aforementioned the second bell crank 54 and have regulating connecting rod 81.
Regulating connecting rod 81 shown in Figure 6, the distolateral 81b of one and connecting rod 55 link, another distolateral being fixedly supported on back shaft 82.Back shaft 82 is supported for, and can rotate with respect to support frame 51 (with reference to Fig. 1).The main part of regulating electric machine 80 is supported on sewing machine stand, and its motor reel links via the not shown collar and back shaft 82.This regulating electric machine 80 is by stepping motor, consist of with the stepping motor of encoder or servomotor etc.In addition, regulating electric machine 80 is controlled by the control part 70 that illustrates in the 1st embodiment.That is to say, detecting as the encoder of detecting unit follows the first and second angles of regulating connecting rod 81 of movement of transmitting the point of contact 38 of connecting rods to change, carry out the control of regulating electric machine 80 by control part 70, to obtain making this detection angles become the needle bar stroke of target.Therefore, if regulating electric machine 80 rotates, regulating connecting rod 81 rotates centered by the axle center of back shaft 82, make two transmit connecting rods 32,33 point of contact 38 moves, thereby can regulate the needle bar stroke.Especially, its adjustable range is set in and comprises point of contact 38 and back shaft 39 concentric position in interior scope, and can make the needle bar stroke is 0.
According to the 2nd embodiment, play the effect identical with the 1st embodiment, compare with the 1st embodiment simultaneously, can be with more simple structural adjustment needle bar stroke.In addition, if stepping motor or servomotor that regulating electric machine 80 uses with encoder, could be more accurately with the position of needle bar Stroke Control in expectation.This encoder becomes and detects two detecting units that transmit the amount of movement of connecting rods 32,33 point of contact 38.In addition, in the 2nd embodiment, because regulating electric machine 80 remains on assigned position via regulating connecting rod 81, connecting rod 55 with point of contact 38, so can be omitted in the moving body 56 that illustrates in the 1st embodiment and by pressing spring 58 etc.
(other)
The invention is not restricted to the respective embodiments described above, can carry out various changes.
For example, in above-mentioned needle bar reciprocating mechanism 10, by pressing pressing spring 58, first of the second bell crank 54 is rotated wrist 54a to moving body 56 side pretensions, make first to rotate wrist 54a to retainer 57 side shiftings by o 52.Also can replace this mode, constitute by being replaced by extension spring by pressing spring 58, or change the direction of pressing by pressing spring 58, and by spring, first of the second bell crank 54 is rotated wrist 54a to retainer 57 side pretensions, utilize o 52 to make it to moving body 56 side shiftings.In addition, use o 52 as actuator, but also can replace this equipment, used cylinder as actuator.In this case, the drive rod of cylinder (output block) links with the second bell crank 54, moves between initial position and progressive position.In addition, be arranged on moving body 56 and the second bell crank 54 butts on regulating electric machine 53, but also can replace this mode, make the output block butt of the actuators such as itself and o 52.
In addition, utilize encoder 60 to detect the rotational angle of the second bell crank 54, but also can use the linear displacement detecting unit except encoder, detection follows the shift action that transmits connecting rod 32,33 point of contact 38 to move or amount of movement or the rotation amount of other parts of spinning movement, can obtain the effect identical with said structure.
In addition, also can use following structure, that is, utilize the output block of actuator to the movement of initial position, make aforementioned first to transmit the point of contact 38 that connecting rod 32 and second transmits connecting rod 33, from moving to the separation point position of separating with it with the position that the back shaft 39 of aforementioned the first bell crank 31 overlaps.
Claims (4)
1. the needle bar reciprocating mechanism of a Sewing machines, it has:
Main shaft, it utilizes sewing machine electromotor to be rotated;
Eccentric cam, it is fixedly mounted on aforementioned main shaft;
The first bell crank, it is supported on framework, can freely rotate a distolateral and aforementioned eccentric cam side link centered by the pivot center parallel with aforementioned main shaft;
First transmits connecting rod, distolateral and aforementioned the first bell crank link of one;
Second transmits connecting rod, another distolateral link of distolateral and aforementioned the first transmission connecting rod of one;
Slave arm, its pivoting end and aforementioned second another distolateral link of transmitting connecting rod;
The reciprocating rotary moving axis, the aforementioned slave arm of its fixed support, itself rotates;
Master arm, it is fixedly supported on aforementioned reciprocating rotary moving axis;
Small rod, its pivoting end and needle bar with aforementioned master arm links, and allows horizontal displacement;
The second bell crank, it is supported on framework, can freely rotate distolateral and aforementioned first a point of contact link of transmitting connecting rod and the second transmission connecting rod centered by the pivot center parallel with aforementioned main shaft; And
Actuator, another distolateral link of itself and aforementioned the second bell crank has the output block that can move to initial position and progressive position,
The needle bar reciprocating mechanism of this Sewing machines, output block by aforementioned actuator is to the movement of initial position or progressive position, make aforementioned first to transmit point of contact that connecting rod and second transmits connecting rod from position that the pivot center with aforementioned the first bell crank overlaps, move to the separation point position of separating with it, the spinning movement of aforementioned eccentric cam is transformed to reciprocating action, be passed to needle bar
It is characterized in that also having:
The 1st retainer, the output block butt of itself and aforementioned the second bell crank or aforementioned actuator; And
The regulating electric machine, it can link the 1st retainer with advancing and retreat, regulates initial position or the progressive position of the output block of aforementioned actuator,
By regulated initial position or the progressive position of the output block of aforementioned actuator by aforementioned regulating electric machine, regulate aforementioned first and transmit connecting rod and the second aforementioned separation point position of transmitting the point of contact of connecting rod, thereby regulate the needle bar stroke.
2. the needle bar reciprocating mechanism of Sewing machines as claimed in claim 1, is characterized in that, has:
Detecting unit, it detects the aforementioned first angle variable quantity that transmits the amount of movement of connecting rod and the point of contact of the second transmission connecting rod or follow some parts that point of contact moves; And
Control module, it controls aforementioned regulating electric machine according to the output of aforementioned detecting unit, to become the needle bar stroke of target.
3. the needle bar reciprocating mechanism of a Sewing machines, it has:
Main shaft, it utilizes sewing machine electromotor to be rotated;
Eccentric cam, it is fixedly mounted on aforementioned main shaft;
The first bell crank, it is supported on framework, can freely rotate a distolateral and aforementioned eccentric cam side link centered by the pivot center parallel with aforementioned main shaft;
First transmits connecting rod, distolateral and aforementioned the first bell crank link of one;
Second transmits connecting rod, another distolateral link of distolateral and aforementioned the first transmission connecting rod of one;
Slave arm, its pivoting end and aforementioned second another distolateral link of transmitting connecting rod;
The reciprocating rotary moving axis, the aforementioned slave arm of its fixed support, itself rotates;
Master arm, it is fixedly supported on aforementioned reciprocating rotary moving axis;
Small rod, its pivoting end and needle bar with aforementioned master arm links, and allows horizontal displacement; And
Regulating connecting rod, it is supported for, can freely rotate centered by back shaft, distolateral and aforementioned first a point of contact link of transmitting connecting rod and the second transmission connecting rod,
Aforementioned first transmits the point of contact that connecting rod and second transmits connecting rod, can move in interior moving range comprising the position that overlaps with the pivot center of aforementioned the first bell crank,
The needle bar reciprocating mechanism of this Sewing machines is transformed to reciprocating action with the spinning movement of aforementioned eccentric cam, is passed to needle bar,
It is characterized in that,
Also have the regulating electric machine, it rotates aforementioned regulating connecting rod,
Regulate aforementioned first by aforementioned regulating electric machine and transmit the moving range that connecting rod and second transmits the point of contact of connecting rod, thereby regulate the needle bar stroke.
4. the needle bar reciprocating mechanism of Sewing machines as claimed in claim 3, is characterized in that, has:
Detecting unit, its detect aforementioned first transmit connecting rod and second transmit connecting rod point of contact amount of movement or follow the angle variable quantity of some parts that point of contact moves; And
Control module, it controls aforementioned regulating electric machine according to the output of aforementioned detecting unit, to become the needle bar stroke of target.
Applications Claiming Priority (6)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2008-145352 | 2008-06-03 | ||
| JP2008145352 | 2008-06-03 | ||
| JP2008145352 | 2008-06-03 | ||
| JP2009126116 | 2009-05-26 | ||
| JP2009-126116 | 2009-05-26 | ||
| JP2009126116A JP2010012235A (en) | 2008-06-03 | 2009-05-26 | Needle vertical movement mechanism in sewing machine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101597842A CN101597842A (en) | 2009-12-09 |
| CN101597842B true CN101597842B (en) | 2013-05-22 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200910142167 Expired - Fee Related CN101597842B (en) | 2008-06-03 | 2009-06-03 | Needle bar reciprocating mechanism of sewing machine |
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| JP (1) | JP2010012235A (en) |
| CN (1) | CN101597842B (en) |
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| JP2019170707A (en) * | 2018-03-28 | 2019-10-10 | ペガサスミシン製造株式会社 | Needle bar drive mechanism for sewing machine |
| JP7356260B2 (en) * | 2019-05-17 | 2023-10-04 | Juki株式会社 | needle feed sewing machine |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4569297A (en) * | 1983-07-07 | 1986-02-11 | Pfaff Industriemaschinen Gmbh | Needle bar detachable drive and stroke adjusting mechanism |
| US4736699A (en) * | 1986-08-13 | 1988-04-12 | Pfaff Industriemaschinen Gmbh | Method of sewing corners of a double seam, with a two-needle sewing machine |
| CN1458321A (en) * | 2002-05-13 | 2003-11-26 | 重机公司 | Needle rod driving mechanism |
-
2009
- 2009-05-26 JP JP2009126116A patent/JP2010012235A/en active Pending
- 2009-06-03 CN CN 200910142167 patent/CN101597842B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4569297A (en) * | 1983-07-07 | 1986-02-11 | Pfaff Industriemaschinen Gmbh | Needle bar detachable drive and stroke adjusting mechanism |
| US4736699A (en) * | 1986-08-13 | 1988-04-12 | Pfaff Industriemaschinen Gmbh | Method of sewing corners of a double seam, with a two-needle sewing machine |
| CN1458321A (en) * | 2002-05-13 | 2003-11-26 | 重机公司 | Needle rod driving mechanism |
Non-Patent Citations (1)
| Title |
|---|
| JP特开平4-289259A 1992.10.14 |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2010012235A (en) | 2010-01-21 |
| CN101597842A (en) | 2009-12-09 |
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