JP2696838B2 - Sky bottle mechanism of sewing machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Industrial application field) The present invention relates to a top bottle mechanism of a sewing machine. The invention is small
Can be used for the top bottle mechanism of household cycle machines
it can. (Prior art) Conventionally, the top bottle mechanism of the sewing machine has been
Provided by slide top bin mechanism disclosed in Japanese Patent Publication No. 422
Have been. This slide top bin mechanism has a thread hook
Top bottle with lock and guide shaft, and freely rotatable on the housing
The main shaft held in the main shaft is fixed to the main shaft and rotates with the main shaft.
, And slide on the guide shaft held by the crank
Consists of a slider. Here, when the main shaft rotates, the clamp fixed to the main shaft
The slider rotates, and the slider held by the crank
It slides on the guide shaft while rotating around it, thereby
Slides and the direction of the guide shaft changes, thus holding the guide shaft.
The heavenly bottle swings, and the hook of this
Reciprocating between (Problems to be Solved by the Invention) By the way, in the above-described top bottle mechanism of the sewing machine,
Fits the hole formed in the holder to the guide shaft with almost no gap
Thus, the slider is held on the guide shaft. That
For point bins, spindles, cranks, sliders, guide shafts, etc.
If the slider is not manufactured with high accuracy,
It is troublesome, and even if it is assembled, the slider operates smoothly.
And the sticking phenomenon easily occurs on the slider. To solve the above seizure problem,
The formed hole should be fitted to the guide shaft with a large gap.
No. However, in this case, because of the large gap, the slider
When the slider slides along the guide shaft, the
It is easy to be. The present invention has been made in view of the above circumstances, and
The purpose of this is to assemble even without strict dimensional accuracy.
Problem, the problem of slider burn-in can be improved
The present invention is to provide a mechanism for a ceiling bin of a sewing machine. [Structure of the Invention] (Means for Solving the Problems) The top bottle mechanism of the sewing machine according to the present invention is mounted on a housing.
A slidably pivoted, reciprocable hook with an upper thread
With the guide shaft extended to the side at the other end.
The top bottle and the housing are rotatably held
Main shaft, crank fixed to main shaft, and crank at one end
Slidably on the guide shaft at the other end.
In a crankpin with a rider, the other end of the crankpin is in a direction parallel to the axis of the main shaft.
It is a configuration that can be displaced relative to the slider along
It is characterized by the following. In the top bottle mechanism of the sewing machine according to the present invention, the top bottle is pivoted.
When supporting it, pivot on the top bin shaft
Can be supported. Top bin shaft is housing, especially how
Installed horizontally in the bed housing below the jing
It is desirable to do. The top bottle will be shown in the examples below.
The height that is connected to the spindle side and swings by the rotation of the spindle
Low rising arm and almost
Can be formed with a horizontally elongated arm that moves horizontally
You. The main shaft is usually connected to a drive motor built into the housing.
Connected and rotated by the drive motor. The other end of the crankpin is parallel to the axis of the spindle.
Therefore, it can be displaced relative to the slider. This place
Displace the other end of the combined crankpin with respect to the slider
Or use a sky bottle or slider
May be displaced relative to the other end of the housing. The crank pin is
One end is formed by a pin, and the other end is parallel to the axis of the main shaft.
It can be formed by a U-shaped portion having a parallel surface. This place
If the pin is rotatable, insert it into the hole formed in the crank.
Pin so that it can slide in the direction parallel to the axis of the main spindle.
Come. Hold the slider between the parallel faces of the U-shaped part. (Operation) In the top bottle mechanism of the sewing machine according to the present invention, the housing
Dimensional accuracy of sky bottle, spindle, crank pin, slider, etc.
Even if the other end is not enough,
Displace the rider in a direction parallel to the axis of the main shaft.
You can assemble the crankpin and slider without any problems.
You. In using the top bottle mechanism of the sewing machine according to the present invention,
The main spindle with the upper thread hooked on the hook of the top bottle.
Rotate. Then, the crank fixed to the main shaft rotates
The crank pin held by the crank moves around the main shaft.
Rotate. At this time, while the slider slides on the guide shaft,
Rotate around the main shaft. Therefore, the guide shaft swings
The direction of the guide shaft changes. As a result, the guide shaft is
The held heaven bottle swings. And with the swing of the sky bottle,
The hook of the heaven bottle with the upper thread hangs between the top dead center and the bottom dead center.
Reciprocate. (Example) Hereinafter, one embodiment of the mechanism of the top bottle of the sewing machine according to the present invention.
An example will be described with reference to the drawings. The top bottle mechanism of the sewing machine according to the present embodiment performs embroidery.
This is the case where the invention is applied to a small household cycle sewing machine. Less than
Each component will be described with reference to the drawings. Figure 1 is Misishi
FIG. 2 is an exploded perspective view of a main part of the sewing machine,
FIG. 3 is a bottom view of the sewing machine with the bed cover removed,
4 is a sectional view taken along the line IV-IV in FIG. 3, and FIG.
FIG. 6 is a sectional view taken along the line VV in FIG. 6, and FIG. 6 is a line VI-VI in FIG.
7 is a cross-sectional view taken along a line in FIG.
FIG. 8 is a plan view and FIG. 8 is a sectional view taken along line VIII-VIII of FIG. Theory
For the sake of clarity, in the order of the housing 1, the needle bar arm 2, and the top bottle 6
explain. (Configuration) The housing 1 will be mainly described with reference to FIG.
You. The housing 1 forms a lower part as shown in FIG.
Bed housing 10 that is thinned in the height direction
Rises upward from the end of the pad housing 10 and further laterally
An extended arm housing 11 and an arm housing 11
With the top cover 12 detachably attached to the top opening of the
Consists of Embroidery frame 13 is attached to bed housing 10
Have been. The embroidery frame part 13 is formed by an outer frame 130 and an inner frame 131.
Have been. By operating the operating tool 130a, the outer frame 130 and the inner frame 131
Then, sandwich the cloth to be embroidered. The embroidery frame 13 is
Attached to the motor unit 100 of the housing 1.
X-direction motor and Y-direction motor
Can be moved in the X and Y directions. X direction module
Motor and the Y-direction motor are built into the housing 1.
Drive controlled by a control unit whose main component is the CPU
Move. The embroidery program is stored in the storage element of the control unit.
Is stored, and the X-direction motor and the
And the Y-direction motor is driven. The top of the bed housing 10 of the housing 1
The needle insertion hole 140 is located below the tip of the
A needle plate 14 is attached. The Y motor
Is shown as a Y motor 16 in FIG. Referring mainly to FIGS. 2, 4 and 5, the needle bar arm 2
Will be described. The needle bar arm 2 becomes narrower toward the tip.
Horizontal arm 20 that extends diagonally in the horizontal direction
Formed with a wide, low-height riser 21 that is integral with the
Have been. The needle bar 22 is stopped in the hole 20b at the tip of the needle bar arm 2.
It is attached by a screw 223. At the lower end of the needle bar 22,
Needle stopper 23 is attached with needle stopper screw 230,
A needle 24 for sewing is attached. Needle bar arm 2 rising
The height of the portion 21 is determined by the needle 24 that swings around the swing shaft 30.
Perpendicular to or perpendicular to board 14
The needle bar 22 and needle 24, etc.
Have been. Into the hole 20a at the tip of the horizontally long arm 20 of the needle bar arm 2.
The presser bar 25 is inserted. Upper end of presser bar 25 is retaining ring 25
O, O-ring 251 keeps it from falling off. Lower end of presser bar 25
Has a metal presser body 26 with a cloth presser function.
Have been. The guide rod 27 attached to the presser body 26
As shown in FIG. 4, it is inserted through the guide hole 28 of the iron bar arm 2.
I have. A spring 29 is provided between the presser body 26 and the needle bar arm 2.
Intervening. On the lower surface of the presser body 26, a ring-shaped
Bullet that enhances the cushioning function and the presser foot function made from the
Sex body 32 is attached. A hole 21a formed below the rising portion 21 of the needle bar arm 2 includes:
The swing shaft 30 is inserted in the horizontal direction. The swing shaft 30 is the second
Through bearing 300, spring 301 and retaining ring 302 shown in the figure
Then, as shown in FIG.
Wall 10a near the recess 10b formed in the head 101 of the ring 10
Is supported in the horizontal direction. A drive unit for swinging the needle bar arm 2 is shown in FIG.
Post 10 formed in bed housing 10 of housing 1
h is held by motor mounting plate 400 held by screw 400a.
Drive motor 40, a large-diameter intermediate pulley 41 for deceleration,
The pulley press-fitted to the pulley 41 and the motor shaft of the drive motor 40
Of the intermediate pulley 41 and the belt 48
The large gear 42 meshing with the gear 41a and the large gear 42 as shown in FIG.
A main shaft 43 that rotates integrally with the gear 42, and an end of the main shaft 43
The top bin crank 44 fixed with the pin 440 to the
As shown, the hole 4 that fits into the cam portion 44a of the top bottle crank 44
It is formed with a needle bar crank 45 having 5a. Shown in Figure 5
As described above, the spherical bearing 43a is inserted through the main shaft 43. Previous
The spherical bearing 43a is connected to the bed housing 1 as shown in FIG.
0e mounting part 10e, holder 10h tightened by screw 10g
Is held through. As shown in FIG.
The rim 41 is supported by a support shaft 49. Support shaft 49 is motor mounting plate 40
It is attached to 0 via a retaining ring 49a. As shown in FIG.
Hole 45c of the needle portion 45b and the hole 21b of the rising portion 21 of the needle bar arm 2.
The shaft 46 is held via a retaining ring 46a. here
Therefore, as is apparent from FIG.
a is eccentric with respect to the axis of the main shaft 43. Therefore, the Lord
When the shaft 43 rotates, the eccentric cam portion 44a rotates
Therefore, the connecting rod part 45b of the needle bar crank rod 45 is
Reciprocating rocking motion in the direction. As a result, the needle bar arm 2 rises
The part 21 reciprocates up and down, so that the needle bar arm 2 swings
Arrow A direction and A 'direction shown in FIG.
Swings back and forth. Next, the top bin 6 that loosens and tensions the upper thread
This will be mainly described with reference to FIG. 2 and FIG. Heaven bottle 6
Is arranged beside the needle bar arm 2 as shown in FIG.
You. The top bin 6 has a low rising arm 60 and a pin 60
It is formed by a horizontally long arm 61 pivotally supported by a. Heaven
The slider 6 operates by a so-called slider link mechanism. Immediately
In the hole 6a formed at the lower end of the rising arm 60 of the top bottle 6,
Has a slide shaft 62 attached thereto. On the guide shaft 62,
A bushing 64 as a slider is slidably inserted.
The bushing 64 is bushed on both sides of the guide shaft 62 in the axial direction.
It is sandwiched and held by the holding holder 65. As shown in FIG. 4, the rising arm 60 of the top bin 6
The pivot hole 60a formed near the hole 6a is inserted through a bearing 60b.
The top bin shaft 63 is inserted. Top bottle 6 has top bottle axis 63
It will swing in the direction of arrow D and arrow D 'as the center
It is pivoted. Here, as shown in FIG.
One end of the crank pin 47 is inserted into the hole 44b of the crank 44.
Pin portion 471 is rotatably fitted. crank
The pin portion 471 of the pin 47 can slide along the hole 44b. Yo
Therefore, the pin portion 471 is in the axial direction of this, that is, the axial center of the main shaft 2.
It can be displaced in a direction parallel to the direction. Crankpi
The U-shaped portion 470 at the other end of the
It has a parallel surface 470a parallel to the axis of the shaft 43. As shown in Figure 4
The parallel surface 470a of the U-shaped part 470 holds the bushing 64
I have. The bushing 64 is along the parallel surface 479a of the U-shaped part 470
Can slide. As a result, the bushing 64 is aligned with the axis of the spindle 43.
It can be displaced in parallel directions. At the tip of the horizontally long arm 61 of the top bin 6, an upward
The hook 66 is provided, and two engagement grooves 67 are provided on both sides of the hook 66.
Is provided. As shown in FIG.
Immediately below the top plate 110 of the
The guide member 15 on which 50 is formed is horizontally disposed.
Engagement of the hook 66 with the peripheral edge 151 forming the guide slot 150
The groove 67 engages and the hook 66 engages along the guide slot 150.
The groove 67 is guided in a substantially horizontal direction. At this time, hook 66
On both sides of the rim, a peripheral portion 151 forming a guide slot 150 is located.
This is advantageous for preventing the hook 66 from falling down.
The tip of the hook 66 is located on the upper surface plate of the arm housing 11.
It protrudes above 110. Next, referring mainly to FIG. 4 and FIG.
Will be explained. Housing as shown in FIGS. 4 and 6
The shuttle 7 is disposed below the needle plate 14 in the bed housing 10.
Is placed. Hook 7 is fixed to hook shaft 79 with set screw 792.
The hook shaft 79 is connected to the housing 1 via a spherical bearing 790.
Horizontally in the housing 10 and parallel to the main shaft 43
Have been. The spherical bearing 790 is betted as shown in FIG.
Fastened to the mounting part 10i in the housing 10 with the screw 10k.
It is held via the holder 10L. Note that FIG.
7a is a hook retainer fixed with a screw 7b. Next, a mechanism for operating the shuttle 7 will be described. In FIG.
As shown, a small timing gear 78 is attached to the hook shaft 79 by a set screw 78.
Mounted via 0. 2 and 5
As shown in the figure, a clutch operating ring 70 and a plate
Spring one-way clutch 71, ring 72, large tie
Ming gear 73 is attached. Large timing gear
73 is connected to the main shaft 43 via a shaft portion 731 and a set screw 73a.
And is linked with the spindle 43. One wake on slit 700 of clutch operating ring 70
The projection 710 of the latch 71 is engaged. One way crack
The protruding piece 711 of the hook 71 is engaged with the slit 730 of the large timing gear 73.
I agree. As shown in FIG. 2 and FIG.
A solenoid 74 and a clutch operating claw 75 are provided adjacent to 70.
The support shaft 49 is inserted into the hole 75a of the clutch operating claw 75,
The switch operating claw 75 swings around the hole 75a. Crack
The pin 75b of the operating claw 75 is the hole 74 of the rod 740 of the solenoid 74.
It is fitted in 1 via a retaining ring 742. Clutch operation
The claw 75 is urged by a spring 76,
The clutch operating pawl 75 rotates around the hole 75a, and the pawl 751
When trying to press the claw 701 of the clutch operating ring 70,
Suctioned through rod 740 by solenoid 74
As a result, the engagement of the clutch operating ring 70 with the pawl 701 is released.
I have. Therefore, the one-way clutch 71
The main shaft 43 is activated via a one-way clutch 71
And the large timing gear 73 are connected. Therefore, large gear
When the main shaft 43 rotates by rotating the large timing gear 73
Rotates in conjunction with. Then, a timing bell with teeth
77 rotates, the small timing gear 76 rotates, and the hook shaft 77,
The shuttle 7 rotates. In the present embodiment, the large timing gear 73
The number of teeth is set to twice the number of teeth of the small timing gear 78.
You. Therefore, when the large timing gear 73 makes one rotation, it becomes smaller.
The timing gear 78 makes two rotations. That is, the spindle 43 is operated once
When the needle bar arm 2 reciprocates once, the shuttle 7 rotates twice.
It consists of The end 76a of the spring 76 is
It is locked in the locking hole 823 of the racket 80. When you want to stop the rotation of the shuttle 7 for the end of sewing, etc.
The control unit operates the solenoid 74. Therefore b
The pad 740 moves forward, and the clutch operating pawl 75 moves around the hole 75a.
And the pawl 751 engages with the pawl 701 of the clutch operating ring 70
Is done. Therefore, the one-way clutch 71 operates in the opening direction.
The main gear 43 and the large timing gear
73 does not rotate. Therefore, the large timing gear 73 stops,
The timing belt 77 does not operate, and the rotation of the shuttle 7 is stopped.
You. The solenoid 74 is connected to the bed 10 as shown in FIG.
Screw 74 on the mounting plate 742 held on the support 10h
It is mounted in the bed housing 10 via 3. As shown in FIG. 2 and FIG.
A bracket 80 is attached above the. Braquet
The fixing portion 8 is formed of a metal plate and has a fixing hole 810.
1 and a holding section that rotatably supports the tension pulley 820
82, a deforming portion 83 located between the holding portion 82 and the fixing portion 81,
It is formed with. In order to facilitate deformation,
A slit 830 is formed. The holding piece 82 has a projection 821
A threaded hole 822 with a female thread is formed
Have been. As shown in FIG. 8, the bracket 80 must be
810a into the fixing holes 810, and
The pad 101 is fixed to the lower surface. Here, the male screw
Adjusting screw 84 is screwed into the screw hole 822 of the protruding piece 821.
You. The tip of the adjusting screw 84 is the bed 10 of the bed housing 10.
It is in contact with the contact portion 10c disposed on the lower surface of the first unit 1. Accordingly
Then turn the adjusting screw 84 to turn it into the adjusting screw 84.
The screw hole 822 is up and down through the deformation of the elastic deformation part 83
Direction, the holding part 82 of the bracket 80, the tension pulley
The re-820 is adjusted vertically and the timing belt 77
The degree of tension is adjusted. Therefore, the timing belt
77 can be prevented from loosening, synchronism between hook 7 and needle bar arm 2
This is advantageous for ensuring synchronization between the upper thread and the lower thread. As shown in FIGS. 2 and 5, the main shaft 43 has
A detection plate 85 consisting of a large circle and a small circle is attached.
The handwheel 86, which is manually operated by the user, has a set screw
Installed by 861. Rotation of detection plate 85
The rotation of the shaft 43 is detected by the photo interrupter 850.
The photo interrupter 850 is built in the bed housing 10.
Function as a visual sensor. In addition, handwheel
86 has a problem with embroidery work, such as thread entanglement.
When the drive motor 40 is stopped, the handwheel 86
Is manually turned by the operator to rotate the spindle 43, thereby
Also for correcting the positions of the shuttle 7, needle bar arm 2, and top bin 6.
It is. The bearing 860 has a bed as shown in FIG.
Screw 10f to the mounting part 10d of the housing 10
It is held via the holder 10h. (Operation) Now, the operation of the sewing machine according to the above-described embodiment will be described.
Will be explained. First, while setting the cloth on the embroidery frame part 13,
With the upper thread hooked on the hook 66 of the top bottle 6 and the operation thread,
By operating the switch, the drive motor 40 is driven to rotate. Drive
Belt 48, intermediate pulley 41, large gear by rotation of motor 40
42, the main shaft 43 rotates counterclockwise in FIG. You
Then, as described above, the ceiling eccentric with respect to the spindle 43
Because the cam portion 44a of the crank 44 rotates, the cam portion 44a
The connecting rod part of the needle bar crank rod 45 that is stuck
45b swings up and down. Therefore, connecting rod part 45b
The rising portion 21 of the needle bar arm 2 connected to the shaft 46 by
In the direction indicated by the arrow A shown in FIG.
Reciprocating around the pivot shaft 30 in the direction and the arrow A 'direction
Move. Therefore, the needle 24 is inserted through the needle insertion hole 140 of the needle plate 14.
Or it comes off the needle insertion hole 140. in this case,
The horizontal arm portion 20 of the needle bar arm 2 is long in the horizontal direction and the swing shaft 30 is a needle
The radius of curvature at which the needle 24 swings away from the position 24 is large
And the upper surface of the needle plate 14 is substantially the same as the axis of the swing shaft 30.
Swing in the direction of arrow A by setting to one height
Needle 24 is perpendicular or perpendicular to needle plate 14 near needle plate 14.
It is in a state close to immediately. Thus the needle 24 is vertical or nearly vertical
Inserted into the needle insertion hole 140 with the cloth held in the embroidery frame
Passed. Fig. 9 shows the needle bar top dead center where the needle bar arm 2 is fully raised.
Fig. 11 shows the bottom dead center where the needle bar arm 2 is fully lowered.
Is shown. As the main shaft 43 rotates, the needle bar arm 2
Swings in the order of FIG. 9, FIG. 10, FIG. 11, and FIG.
It is. In this embodiment, when the main shaft 43 rotates, the one-way
The large timing gear 73 rotates via the switch 71,
Hook 7 via Gubelt 77, small timing gear 78, and hook shaft 79
Rotates in synchronization with the swing of the needle bar arm 2, that is, the needle bar arm 2
When the shuttle 7 makes one reciprocation, the shuttle 7 rotates twice, and the needle 24 pierces the needle plate 14 above.
Penetrate the cloth held by the embroidery frame 13 and insert the needle insertion hole 140
When passing, the upper thread hung on the needle 24
The lower thread is hooked and sewn on the cloth of the embroidery frame 13 with the upper thread and the lower thread
Eyes are formed. In this case, the embroidery frame 13 is
Moved by the X-direction motor and Y-direction motor controlled by the control unit.
The embroidery is formed on the cloth. Next, the operation of the top bin 6 will be described. When main shaft 43 is opposite
When rotated in the counterclockwise direction, the top bottle crank 44 also turns counterclockwise.
Rotate. Therefore, the crank pin 47 also rotates counterclockwise.
You. Therefore, the bushing 64 held by the U-shaped portion 470
In the counterclockwise direction, that is, in the direction of arrow C shown in FIG.
Rotate around the axis of. At this time, the crankpin 47
Pin part 471 turns to the hole 44b of the top bottle crank 44
Then, the U-shaped portion 470 and the bushing 64 change direction. Up
When the bushing 64 rotates in the direction of arrow C as described above,
The bushing 64 held by the V-shaped portion 470
While sliding, reciprocating sliding along the length of the guide shaft 62
return. At this time, as shown in FIG.
Since b is restricted by the hole 6a, the direction of the arrow C of the bushing 64 is
As shown in Fig. 9 to Fig. 12 with the rotation to
The shaft 62 swings, and the inclination angle of the guide shaft 62 changes. This
Guide shaft 62 is fixed due to the change of the inclination angle of guide shaft 62
The rising arm 60 of the top bottle 6 is
And swing back and forth in the direction of arrow D '. On the other hand, hook 66 engagement
The groove 67 is guided by the guide elongated hole 150 of the guide member 15, and is substantially
To reciprocate horizontally, the horizontal arm 61 of the top bin 6
In the horizontal direction, that is, in the directions of arrows E and E '.
Move back. Needle bar arm 2 at top dead center
The bushing 64 has an arrow about the axis 43b of the spindle 43.
When rotated in the C direction, the inclination angle between the bushing 64 and the hole 6a
The guide shaft 62, which is restricted, is indicated by a two-dot chain line in FIG.
It rises slightly. Therefore, the rising arm 60 is shown in FIG.
And starts swinging in the direction of arrow D '. Therefore, heaven bottle 6
The hook 66 moves in the direction of the arrow E ', that is, the return direction.
Approaching dead center. Heaven bottle where hook 66 of heaven bottle 6 has returned
FIG. 10 shows the state at the position of the top dead center. Further, from the position of the top dead center of the top bin shown in FIG.
The crank 44 further rotates and the bushing 64 is shown in FIG.
When it is further rotated in the direction of arrow C, a two-dot chain line
Like the female bushing, the inclination angle is restricted by the bushing 64 and the hole 6a.
The guide shaft 62 tilts slightly in the direction of sleeping than before. This result
As a result, the rising arm 60 of the sky bottle 6 is in the direction of arrow D shown in FIG.
And the hook 66 moves in the direction of arrow E shown in FIG.
Start moving. Therefore, the upper thread hung on the hook 66
Tension relaxes. Here, FIG. 10 shows a state immediately before the needle 24 is inserted through the cloth.
Immediately before the needle 24 is inserted through the cloth, tension of the upper thread
The tension of the upper thread to prevent cutting due to
Need to loosen. Therefore, as described above, the hook 66
Move in the direction of arrow E to remove the upper thread
It loosens. In FIG. 11, the bushing 64 has further rotated in the direction of arrow C.
The state is indicated by a solid line. In FIG. 11, the footage is greater than in FIG.
The hook 66 is further moved to the needle 24 side to loosen the upper thread. Eleventh
The top bin crank 44 is turned further from the state shown by the solid line in the figure.
And the bushing 64 rotates in the direction of arrow C shown in FIG.
Then, as shown by a two-dot chain line in FIG.
Get closer to sleeping in a state that is almost horizontal. So even more heaven
The rising arm 60 of the bin 6 swings in the direction of arrow D shown in FIG.
Move forward. Therefore, the hook 66 of the top bottle 6 is on the needle 24 side.
And move closer to the state of the bottom dead center of the sky bottle. Figure 12 shows the sky
This shows the state of the bottom dead center of the top bin where the bin 6 has advanced. The above-mentioned top bottle 6 is a quick return mechanism. That is,
From the state of top dead center of the top bin shown by the solid line in FIG.
After the state shown by the solid line and the two-dot chain line, the solid line in FIG.
Until it reaches the state of the bottom dead center shown in the sky bottle, that is, the hook
In the case where 66 is going toward the needle 24 side, as shown in FIG.
Meanwhile, the bushing 64 rotates around the main shaft 43 at an angle θ1 (see FIG. 12).
See) You have to rotate quite a bit. On the other hand, in FIG.
From the state of the bottom dead center of the top bottle shown by the solid line, it is shown by the solid line in FIG.
Until the top bottle reaches the top dead center, that is, the hook 66
Return from the needle 24 side to the swing shaft 30 side,
Of the main shaft 43 by an amount corresponding to the angle θ2 (see FIG. 12).
It is enough to rotate. Here, in the relationship of θ1> Θ2,
is there. Therefore, the hook 66 returns quickly and returns in a short time. By the way, in this embodiment, when the top bottle 6 is assembled,
Put the crank pin 47 on the thing 64 in the direction of the axis of the main shaft 43.
If it is displaced along, the housing 1, the top bottle 6, the main shaft 4
3.Dimensional accuracy of crank pin 47 and guide shaft 62 is not enough
Bushing that acts as a slider even when
64 is along the parallel surface 470a of the U-shaped portion 470 of the crankpin 47.
Sliding and displacing in the direction parallel to the axis of the main shaft 43
Can be. Therefore, the bushing 64 is a parallel surface 470 of the U-shaped portion 470.
can escape along a, that is, the direction of the axis of the spindle 43
Can escape in a direction parallel to In addition, crank crank
The pin portion 471 of the pin 47 also slides along the wall surface of the hole 44b, and the spindle 43
Can escape in the axial direction. (Effects) In this embodiment, the bushing 64 and the crank pin 47
471 can be displaced in a direction parallel to the axis of the main shaft 43.
Configuration. Therefore, the dimensional accuracy of the main shaft 43, guide shaft 62, etc.
Even if the degree is not enough,
Assembling with Thing 64 can be facilitated. When the top bin 6 swings, the bushing 64 and the crankpin
Even if excessive force is applied to 47 etc., the bushing
64 and the pin portion 471 of the crank pin 47 are the shaft center of the main shaft 43.
You can escape in a direction parallel to the direction. Therefore c
Housing 1, main shaft 43, top bottle 6, guide shaft 62, top bottle shaft 63
The bushing does not require strict dimensional accuracy
64 rotates around the main shaft 43 while sliding smoothly on the guide shaft 62
It works. Therefore, the bushing 64 needs to be refueled.
Seizure does not occur even if not skipped. Moreover, in this embodiment,
Because the bushing 64 is made of resin, the crank pin 47
Even if it collides with
This is advantageous in terms of suppression. In the present embodiment, the needle bar arm 2 is moved around the pivot shaft 30 as a center.
Because it is a configuration that swings with respect to the housing 1, a vertical bar
Compared to conventional sewing machines with a configuration in which the needle bar reciprocates vertically
In comparison, the overall height of the sewing machine can be reduced. Especially
Since the length of the horizontally long arm portion 20 of the needle bar arm 2 is long,
The distance from the axis of the swing shaft 30 to the needle 24
When the needle 24 swings toward the needle insertion hole 140.
The radius of curvature of the needle 24 can be increased, and the needle 24 can be inserted through the needle insertion hole 14.
This is advantageous for insertion perpendicular to 0. In the present embodiment, the bushing 64 is located
Between the bushing holders 65 on both sides of the
The guide shaft 62 even if the bushing 64 operates.
It does not come off. [Effect of the Invention] In the sewing machine according to the present invention, as described above, the crank
The other end of the pin is parallel to the axis of the spindle with respect to the slider
It is a configuration that can be relatively displaced in various directions. So, Hauge
The dimensional accuracy of the ring, top bottle, crank, guide shaft, etc. is sufficient
The slider and crank pin,
It can simply be assembled. In addition, the slider moves in the direction parallel to the axis of the main shaft.
Since it is possible to escape, the main shaft, sky bottle, guide shaft, etc.
Slider burn-in without requiring strict dimensional accuracy
Problem can be improved.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 shows an embodiment of the present invention. FIG. 1 is a perspective view of the entire sewing machine, FIG. 2 is an exploded perspective view of essential parts, and FIG. FIG. 4 is a sectional view taken along line IV-IV of FIG. 3, FIG. 5 is a sectional view taken along line VV of FIG. 3, and FIG. 6 is a line VI-VI of FIG. Sectional view along the line,
7 is a plan view showing a state in which a top cover is removed, FIG. 8 is a sectional view taken along line VIII-VIII of FIG. 3, FIG. 9 is a side view showing a needle bar arm top dead center, and FIG. Side view showing top dead center, No.
FIG. 11 is a side view showing the bottom dead center of the needle bar arm, and FIG. 12 is a side view showing the bottom dead center of the top bin. In the figure, 1 is a housing, 10 is a bed housing, 11 is an arm housing, 2 is a needle bar arm, 20 is a horizontally long arm, 21 is a rising portion, 22 is a needle bar, 24 is a needle, 30 is a swing shaft, 40 Is a drive motor, 43 is a main shaft, 44 is a top bottle crank, 44b is a hole, 45 is a needle bar arm crank, 47 is a crankpin, 470 is a U-shaped part, 470
a is a parallel plane, 471 is a pin part, 6 is a top bottle, 62 is a guide shaft, 63
Denotes a top bottle axis, 64 denotes a bushing (slider), and 66 denotes a hook.

Claims (1)

(57) [Claims] A top bottle that is swingably supported by the housing and has a hook on which the upper thread is hung and can reciprocate at one end, and a top bottle that has a guide shaft extending toward the side at the other end, and is freely rotatable to the housing A crank shaft fixed to the main shaft, and a crank pin having one end rotatably held by the crank and a slider sliding on the guide shaft at the other end. The top bottle mechanism of the sewing machine, wherein an end is configured to be displaceable relative to the slider along a direction parallel to the axis of the main shaft. 2. One end of the crank pin is a pin portion rotatably fitted in a hole formed in the crank and slidably movable in a direction parallel to the axis of the main shaft. 2. The top bin mechanism of a sewing machine according to claim 1, wherein the U-shaped portion has a U-shaped portion having a parallel surface which slides relatively in a direction parallel to the axis direction of the sewing machine.