JP2696844B2 - sewing machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Field of Industrial Application) The present invention relates to a sewing machine. The present invention is, for example, a small home.
It can be used for embroidery sewing machines. (Prior Art) In a conventional sewing machine such as a home embroidery sewing machine, an actuating machine is used.
Check the moving space of the carrier reciprocated by the eta section.
An opening is formed in a part of the housing to maintain
Make the carrier reciprocate at the opening, and
Carriers connected with endless belts are known.
You. This sewing machine is related to Japanese Utility Model Publication No. 61-40289.
It is. In this sewing machine, the actuator operates
When the carrier moves, the cloth holder connected to the carrier
The embroidery frame you carry moves. In this sewing machine, the endless belt is
Because it is connected to the carrier,
Accordingly, the endless belt reciprocates in the opening. So
Therefore, even if the carrier reciprocates in the opening,
Endless belt can always be closed on the belt surface
You. As a result, dust and foreign matter enter the housing through the opening.
Can be prevented. Also, the internal mechanism of the housing
To prevent the oil that has been refueled from splashing outwards,
The sewing material can be prevented from being stained with oil. (Problems to be solved by the invention) By the way, on the structure where the opening is covered with an endless belt
With the sewing machine, the endless belt is insufficient in strength.
When the endless belt is pressed, it bends. That
The function of preventing dust and foreign matter from entering is reduced,
There is a problem that decreases. The present invention has been made to improve the above problems.
The purpose is to improve the dust and foreign matter intrusion prevention function,
An object of the present invention is to provide a sewing machine having an improved oil scattering prevention function. [Structure of the Invention] (Means for Solving the Problems) The sewing machine according to the present invention includes a central portion in a carrier moving direction.
And extending along the carrier moving direction
A housing having a cover guide, and a housing held in the housing and moved along the carrier moving direction.
An actuator having a movable carrier and a cover guide movably mounted on the housing,
Cover guide with the carrier
Forward and backward with respect to the housing along the direction
Moving in at least one of the directions
Act that protrudes from at least one of the front and rear ends of the
The length of the actuator cover in the carrier movement direction is
In order to secure the closeability of the opening when moving the carrier,
Actuator length in the carrier movement direction of the opening and actuator
Than the total length of the cover plus the maximum travel stroke
It is characterized by being set long. The opening formed in the housing is
It is located at the center in the carrier moving direction. The opening is
It is usually a space for carriers to move.
You. Therefore, the opening should take into account the carrier movement distance.
Therefore, it is usually a rectangular shape extending in the carrier moving direction.
The cover guide can be formed, for example, on the wall of the housing.
You. The actuator section includes at least a carrier
A mechanism for driving in the moving direction, for example, the Y-axis direction.
Guide shaft, the carrier guided by the guide shaft
A) Servo motor to drive carrier, timing base
It can be composed of a router or the like. Carrier usually has a sting
An embroidery frame is attached. The actuator cover has fewer actuators.
Both cover a part. The actuator cover is
Indirectly or directly with screws via other members
Connected to the carrier. The actuator cover is
Since it is connected to the carrier as described above,
Advance with the advance of the career, retreat with the retreat of the career
I do. When the actuator cover moves like this
The actuator cover is guided by the cover guide
You. Note that the actuator cover is
Moving in both forward and backward directions
Can, or in some cases, housing
Forward with respect to and retract with respect to the housing
Only one of them may be moved. This place
When the actuator cover moves forward, the actuator
The cover covers protrude from the front end of the housing. Also, acti
When the actuator cover retracts, the actuator cover
Protrudes from the rear end of the housing. Actuator cover is
When moving forward and backward,
The length in the rear direction is the direction of the carrier in the opening.
And the maximum length of the actuator cover in the forward direction
Maximum stroke and retraction direction of actuator cover
Set it longer than the length plus the stroke. (Operation) When the actuator moves and the carrier moves,
The actuator cover connected to the carrier
Guided by the cover guide while closing the opening of the housing
Move. As a result, the actuator cover
Project from the edge of the ring. EXAMPLES Hereinafter, the present invention is applied to a small household embroidery sewing machine.
The embodiment will be described with reference to FIGS. 1 to 9.
FIG. 1 is a perspective view showing the appearance of the entire sewing machine, and FIG.
Fig. 3 is a plan view of the machine with the bed cover removed.
FIG. 4 is a cross-sectional view of a part of FIG.
FIG. 5 is a cross-sectional view taken along line VV in FIG.
FIG. 6, FIG. 6 is a sectional view taken along the line VI-VI in FIG. 2, and FIG.
FIG. 2 is a sectional view taken along the line VII-VII of FIG. 2, and FIG.
FIG. 3 is a perspective view showing the embroidery frame holder. Fig. 9 shows a part
It is a side view of the sewing machine shown excepting. (Configuration) For convenience of explanation, the explanation of the actuator cover etc.
The housing will be described. First, the housing 1 will be described mainly with reference to FIG.
I will tell. The housing 1 has a lower part as shown in FIG.
A bed housing 2 formed and thinned in the height direction;
Rise upward from the end of the bed housing 2 and further in the Y-axis direction
Arm housing 3 extending from
Top cover 4 removably attached to the upper opening 3
Consists of Upper surface of bed housing 2 of housing 1
The needle is located below the tip of the arm housing 3
A needle plate 6 having a through hole 5 is attached. As shown in FIG.
On the opposite side of the housing 3, an opening penetrating vertically
2c is formed. The opening 2c is provided in the housing 1
A rectangular shape at the approximate center of the Y-axis direction as the rear movement direction
Is formed. The length dimension of the opening 2c in the Y-axis direction is
L2 shown in FIG. The bed housing 2
The bottom wall and the vertical wall near the opening 2c extend in the Y-axis direction.
Cover guide 2d is formed. (Sewing Mechanism of Sewing Machine) Next, the sewing mechanism of the sewing machine will be described mainly with reference to FIGS.
This will be described with reference to FIG. Needle bar arm 7
A horizontally long arm 8 that extends diagonally and becomes narrower
And a wide, low-height rising portion integrated with the horizontally long arm portion 8
9 are formed. At the tip of the needle bar arm 7, a needle bar 10,
A sewing needle 12 is attached via a needle stopper 11.
A presser bar 13 and a cloth presser 14 are attached to the tip of the needle bar arm 7.
Have been killed. The lower part of the rising portion 9 of the needle bar arm 7 swings
The shaft 15 is inserted. The swing shaft 15 is
Bed 2a forming the upper surface of the housing 2 horizontally
It is pivoted on. Bed housing 2 of housing 1
Inside the drive motor 16 is mounted via the bracket 16a
ing. The driving force of the driving motor 16 is apparent from FIG.
The belt 17, the intermediate pulley 18 for reduction, the gear 19,
The power is transmitted to the main shaft 21 via the gear 20. Top bottle on main shaft 21
The crank 22 is fitted with the cam portion 22a of the top bottle crank 22.
A needle bar crank rod 23 is attached. The cam
The portion 22a is eccentric with respect to the axis of the main shaft 21. Next to the needle bar arm 7, loosen or tension the upper thread
A sky bottle 24 is provided. The top bin 24 is low
Ascending arm 25, and horizontally long arm 26 pivotally supported by pin 25a
It is formed with. At the lower end of the rising arm 25 of the top bin 24
Has a slide shaft 27 attached thereto. On slide shaft 27
The bushing 28 is movably inserted, and the bushing 28
Are the bushing holders on both sides of the slide shaft 27 in the axial direction.
It is pinched at 29. On the rising arm 25 of the sky bottle 24,
The top bin shaft 30 is inserted. Horizontal arm 26 of sky bottle 24
Is provided with a hook 31 for threading. H
The hook 31 is guided in a substantially horizontal direction along a guide 32.
The shuttle 33 is provided in the bed housing 2 of the housing 1 with the needle plate 6.
It is located below. The shuttle 33 is, as shown in FIG.
It is held on a shuttle shaft 34. Small timing gear for hook shaft 34
35 are installed. On the other hand, large timing
A gear 36 (see FIG. 3) is mounted. Great Taimi
Between the driving gear 36 and the main shaft 21 at all times.
The clutch operating ring 38 is interposed. Clutch operation
The ring 38 is engaged with the arm 39a of the solenoid 39.
Here, when the solenoid 39 operates, the clutch operating ring
38 opens, and the power transmission between the large timing gear 36 and the spindle 21
Sever us. Large timing gear 36 and small timing gear 35
A timing belt 37 is stretched between them. Great Thailand
The number of teeth of the mining gear 36 is twice the number of teeth of the small timing gear 35
Is set to Therefore, the large timing gear 36
After one rotation, the small timing gear 35 makes two rotations. Toes
When the main shaft 21 makes one rotation and the needle bar arm 7 makes one reciprocation, the shuttle 33
Rotates twice. In addition, as shown in FIG.
In addition, a detection plate 40 is attached to the main shaft 21, and
Has a handwheel 41 that is manually operated.
You. The rotation of the detection plate 40, that is, the rotation of the main shaft 21,
It is detected by the taper 40a. The detection signal is
1 is input to a control unit built in the device. (Actuator) An actuator for moving the embroidery frame 125
Will be described. Move the embroidery frame 125 in the two-dimensional Y-axis direction.
The first actuator section 49, which is a mechanism for moving
This is shown in FIG. 3, FIG. 5, and FIG. Refer mainly to this figure.
This will be described below. The bed housing 2 has the first
A tuator section 49 is built in. This first actue
In the data section 49, as shown in FIG.
The bracket 50 is fixed to the bracket 2 with screws 51,
An idle pulley 53 is rotatably supported by the held shaft 52.
ing. The bed mounted on the board is
The photo interrupter 54 is fixed. Bed house
A fixing plate 55 is fixed to the bracket 2 with screws 56. Fixing plate 55
A long Y guide shaft 57 is provided between the
Extend in the Y-axis direction of the housing 1. No.
As shown in FIG. 7, the first carrier 58 includes a base 58a and a base 5a.
8a and a guide portion 58b on the end side. Of the first carrier 58
A long cylindrical linear bearing 59 is attached to the guide 58b.
Have been. Linear bearing 59 on Y guide shaft 57
It is slidably fitted. Therefore, the first carrier 58
It is held by the Y guide shaft 57 in a cantilever state. No.
As shown in FIG. 3, the bed housing 2 is
Bracket 61 is fixed. Motor bracket 61
, A Y motor 63 is fixed with a screw 62. Y motor 63
Gear 64 and encoder disk 63a are press-fitted into the rotating shaft of
ing. Pulley bracket on motor bracket 61 with screws 65
And the shaft 67 is caulked to the pulley bracket 66
Have been killed. The shaft 67 has a gear 68 and a Y timing pulley
69 is attached via a stop ring 70. Y-ta
Y tie between the imming pulley 69 and the idle pulley 53
A mining belt 71 is stretched. Y timing belt
71 and the first carrier 58 are connected via a belt holder 72.
Have been. The belt holder 72 has a tongue piece 72a. Tongue piece 72a
When moving in the arrow Y2 direction, the movement of the tongue piece 72a is
It is detected by the taper 54. Hence the initials of career 58
The noise signal is composed of the CPU etc. built in Haveng 1
Input to the control unit. Here, the Y motor 63 is driven
And the Y timing belt 71 is formed via the gear 64 and the gear 68.
And the first carrier 58 is moved to the Y guide shaft 57
Is guided in the direction of arrow Y1 shown in FIG.
Retreat in the Y2 direction. In addition, as shown in FIG.
The pulse encoder 73 is fixed via the mounting plate 73b and 73a.
ing. The pulse encoder 73 is an encoder disk 63a
, The rotation speed of the Y motor 63 is detected. This detection signal
Is input to the control unit. Next, the second actuator section 75 will be described. Second
The actuator section 75 sets the embroidery frame 125 in a two-dimensional direction.
7 and 4 in the X-axis direction.
It is shown in the figure. Mainly, referring to FIG. 7 and FIG.
I will tell. In the second actuator section 75, as shown in FIG.
The pulley bracket 76 is held by the X motor bracket 82.
The shaft 77 is swaged to the pulley bracket 76,
Gear 78 and X timing pulley 79 stop ring on shaft 77
It is pivoted through 80. Screw 81 to the first carrier 58
One end of the X motor bracket 82 is fixed via the intermediary.
The X motor bracket 82 extends in the X axis direction of the sewing machine.
You. A wall 82b is provided at one end of the X motor bracket 82.
At the other end of the X motor bracket 82, a vertical wall portion 82c is provided.
Have been killed. Screw 83 between vertical wall portion 82b and vertical wall portion 82c
X guide shuff extending in the X axis direction of the housing 1
G extends in the direction crossing the Y guide shaft 57
Have been. X motor on one end of X motor bracket 82
85 is fixed via screws 86. As shown in FIG.
The gear 92 and the encoder disk 94 on the rotating shaft of the X motor 85
Is press-fitted, and the gear 92 and the gear 78 mesh with each other. X motor bra
The pulse encoder 95 is mounted on the vertical wall 82d of the
6, It is attached via the screw 97. Pulse encoder 9
5 is the rotation of the encoder disk 94 and thus the X motor 85
Detect rotation of The detection signal is input to the control unit.
It is. (Actuator cover, etc.) The actuator cover is mainly shown in FIGS.
This will be described with reference to FIG. As shown in FIG.
Made of synthetic resin via tapping screw 87 to tap bracket 82
The actuator cover 89 is attached. But
Actuator cover 89 attaches X motor bracket 82
The base is connected to the base 82a of the first carrier 58 via the first carrier 58. This
As a result, as shown in FIG.
-89 is attached to the cover guide 2d of the bed housing 2.
And covers the opening 2c of the bed housing 2. here
When the first carrier 58 moves in the Y-axis direction,
The eta cover 89 is guided by the cover guide 2d while the X
It moves integrally with the motor bracket 82 in the Y-axis direction. In the present embodiment, the actuator cover 89 in the Y-axis direction is
The length L1 is equal to the length L2 of the opening 2c in the Y-axis direction.
The forward direction of the actuator cover 89, that is, the
Large movement stroke S1 and retraction of actuator cover 89
Direction, that is, the maximum movement stroke S2 in the arrow Y2 direction.
Characterized by being set longer than the length dimension
(L1> L2 + S1 + S2). Engage with end of actuator cover 89 as shown in FIG.
A protrusion 90 is formed on the inner surface of the actuator cover 89.
Key-shaped ribs 91 are formed. Figures 4 and 2
As is clear from the comparison, the actuator cover 89
Is the X motor bracket 82, gear 92, X timing
It covers Li 79 and others. As shown in FIG.
With the groove of 91 and the tip of the vertical wall portion 82b of the X motor bracket 82
Are engaged. Therefore, the first carrier 58 has arrows Y1 and Y2.
When the actuator moves in the direction
Although the eta cover 89 moves in the directions of the arrows Y1 and Y2, the key
The engagement between the groove of the rib 91, the vertical wall portion 82b, and the distal end portion
The lifting and rattling of the tutor cover 89 can be prevented.
As shown in FIG. 4, at the other end of the X motor bracket 82,
A pulley bracket 99 is attached to a certain vertical wall portion 82c via a screw 98.
Shaft 10 held and caulked to pulley bracket 99
The idle pulley 101 is rotatably held at 0. A
Between the idle pulley 101 and the X timing pulley 79, X
A timing belt 102 is stretched. Screw 98
X timing to loosen and swing pulley bracket 99
The tension of the belt 102 can be adjusted. X timing belt 1
02 holds the embroidery frame holder 104 via the belt holder 103
Have been. Here, when the X motor 85 is driven, the gear 9
2. X timing belt 1 via X timing pulley 79
02 operates. Therefore, the embroidery frame holder 104 is
It is guided by the shaft 84 and moves along its axis.
You. At the other end of the X motor bracket 82 as shown in FIG.
A shaft 105 is caulked to a certain vertical wall portion 82c,
A rotating roller 106, which functions as a rolling element, is rotatable on the shaft 105.
It is inserted in. The rotating roller 106 is a bed housing
2 is guided and held on the upper surface of the bed 2a.
It rolls and runs in the Y-axis direction. The rotating roller 106 runs
It is made of rubber in consideration of performance and low noise. As shown in FIG. 7, the X guide shaft 84 and the embroidery frame
Most of the rudder 104, etc. are made of a synthetic resin second actuator.
Cover 107. 2nd actuator cover
An engagement hole 108 is formed at one end in the X-axis direction of the
A projection 108b is provided at the other end in the X-axis direction of the actuator cover 107.
It is formed toward the inside. Projection 108b is X motor bra
The socket 82 is fitted into a hole in the vertical wall portion 82c. 2nd acti
The engagement hole 108 of the heater cover 107 and the actuator cover
8989 and the projection 108b with the wall portion.
By fitting into the hole of 82c, the second actuator cover
Bar 107 is the actuator cover 89 and X motor
It is detachably attached to the bracket 82. Therefore the second
The actuator cover 89 shown in the figure moves in the directions of arrows Y1 and Y2.
When moved, the second actuator cover 107 is also integrated.
Move in the directions of arrows Y1 and Y2. Also shown in FIG.
As described above, the engaging projection 109 is provided on the second actuator cover 107.
A small gap S is formed between the lower surface 3a of the
So that it is formed upward. Therefore, the second
Actuator in the unlikely event that cover 107 rises
Even if it tries to slip out of the data cover 89, the engagement projection 109
To contact the lower surface 3a of the arm housing 3, the second
This is advantageous for suppressing detachment of the tutor cover 107.
In addition, as shown in FIG.
107 and actuator cover 89 are T-shaped as a whole
It is attached to. Next, refer to FIG. 8 for the embroidery frame holder 104 described above.
And add an explanation. The embroidery frame holder 104 has a protrusion 113 and
Holder body 114 with groove 112, upper surface 115a side is N pole and lower surface
The magnet 115 with the S pole on the 115b side and the lower surface of the magnet 115
115b, and is fixed to the holder body 114 with screws 116
A fixed plate 117 having a stop 117a and an upper surface 115a of the magnet 115
Plate 11 having a long hole 118 which is applied to
9 and is formed. A long cylindrical liner is
The bearing 129 is press-fitted, and the belt holder 103 is
Fixed at 3a. Linear bearing of holder body 114
And the holder body 114 is fitted to the X guide shaft 84,
It is guided by the X guide shaft 84. As shown in FIG.
The groove 112 of the embroidery frame holder 104 is
The embroidery frame holder 104
The rear side is supported. Therefore, pull the embroidery frame holder 104
Is cantilevered embroidery frame 125 with only one X guide shaft 84
No problem. (Embroidery Frame) Next, the embroidery frame 125 will be described with reference to FIG.
The embroidery frame 125 is made of a synthetic resin
A frame 126 having a substantially square shape and having corners 127a to 127d.
The outer frame 127 is made of a synthetic resin. Outside of inner frame 126
The inner surface of the outer frame 127 is a holding surface for holding the cloth. Outer frame 1
27, a cut 128 is formed at one corner 127a thereof,
A first projection 129 is formed at one end forming a cut 128,
The nut 130 is inserted into the hole of the first protrusion 129. This and
The screw hole 131 of the nut 130 fits the corners 127b and 127d of the outer frame 127.
It is almost parallel to the connecting diagonal line 133. Corners 127b, 127d
Is adjacent to the corner 127a where the cut 128 is formed.
You. A second protrusion 132 is formed at the other end forming the cut 128.
Have been. The second protrusion 132 has a screw substantially parallel to the diagonal line 133.
An insertion hole 134 is formed facing the screw hole 131. Screw insertion
A screw member 135 is inserted into the through hole 134 almost parallel to the diagonal line 133.
And the tip of the screw member 135 is screwed.
Screw it into the hole 131. Then, the inner side of the outer frame 127
Approaching the outer surface, the inner surface of the outer frame 127 and the outer surface of the inner frame 126
The cloth is pinched. In this case, the tip of the screw member 135 is
Because it is covered by the first protrusion 129, it protrudes from the first protrusion 129
I haven't. The resilient force of the spring 134a causes the screw member
903 screw loosening can be prevented. The first protrusion 129 of the outer frame 127 is attached with a screw 136 for mounting.
A steel suction bracket 137 is fixed. Suction bra
Notches 137a are formed on both sides in the width direction of the bracket 137.
I have. The notch 137a locks with the locking portion 117a of the fixing plate 117. When attaching the cloth to the embroidery frame 125,
With the cloth inserted between the inner frame 126 and the outer frame 127,
Turn the operation part 135a of the material 135 with your fingertip to
Screw it into the screw hole 131 of the outer frame 127. Then the cut 1 of the outer frame 127
Outside of inner frame 126 as 28 becomes narrower or missing
The inner surface of the outer frame 127 approaches the surface, and the outer surface of the inner frame 126 and the outer frame
The cloth is pressed against the inner surface of 127. Embroidery frame 125
When attaching to the rudder 104, as shown in FIG.
Then, attach the suction bracket 137 to the fixed plate 117 and the floating plate 119.
I'm sorry. At this time, fix with the notch 137a of the suction bracket 137
Since the locking portion 117a of the plate 117 is locked, the embroidery frame 125
Can be prevented. When applied as above, it breaks to Fig. 6.
As indicated by the line W, the floating plate 119, the suction bracket 13
7, a closed magnetic flux loop is formed through the fixing plate 117,
As a result, the suction bracket 137 of the embroidery frame 125 becomes the embroidery frame holder.
It is adsorbed to 104 so that it can be detached. At this time, the embroidery
When the embroidery frame 125 swings up and down, it follows the swing and floats.
The moving plate 119 is shifted on the upper surface 115a side of the magnet 115
However, the suction bracket plate 137 and the floating plate 119 remain in contact with each other.
Similarly, the suction bracket plate 137 and the fixing plate 117 are in contact with each other.
The magnetic flux remains closed loop.
You. (Operation) First, from the operation of the sewing mechanism of the sewing machine described above, the sixth
This will be described with reference to the drawings. Outside of embroidery frame 125 as described above
While holding the cloth between the frame 127 and the inner frame 126, the needle 12 and
With the upper thread hooked on the hook 31 of the top bin 24,
The drive motor 16 is operated to rotate the drive motor 16. Then the
As is clear from FIG. 6, by the rotation of the drive motor 16,
Through the belt 17, the intermediate pulley 18, and the large gear 20, the main shaft 21 is
In FIG. 6, it rotates counterclockwise, that is, in the direction of arrow C.
You. Then, as described above, eccentricity with respect to the axis of the main shaft 21
The cam portion 22a of the top bottle crank 22
Of the needle bar crank rod 23 fitted to the cam portion 22a.
The connecting rod 23a swings up and down. So the needle
The rising part 9 of the stick arm 7 moves up and down, so that the needle
The stick arm 7 is moved in the directions of arrows A and A 'shown in FIG.
The needle 12 reciprocates around the pivot shaft 15, and the needle 12 is inserted into the needle plate 6.
It is inserted through the through hole 5. In this embodiment, as is apparent from FIG.
The large timing gear 36 rotates, and the timing
The hook 33 is a needle via the shaft 37, small timing gear 35, and hook shaft 34.
It rotates in synchronization with the swing of the rod arm 7, that is, the needle bar arm 7
When it returns, the shuttle 33 rotates twice, and the needle 12 moves to the embroidery frame above the needle plate 6.
When you pierce the cloth held by 125,
The lower thread from the hook 33 is hooked on the upper thread
A stitch is formed on the cloth of the embroidery frame 125 with the thread. Next, the operation of the top bin 24 will be described. When main shaft 21 is counter
When the bushing 28 rotates counterclockwise, the bushing 28
In the direction of arrow C shown in FIG.
Rotate. At this time, the bushing 28
Repeat the reciprocating slide along the length direction,
Varies. Such inclination of the slide shaft 27
As the angle changes, the rising arm 25 of the top bin 24
It swings back and forth in the direction D and the arrow D '. And
The guide 31 is guided by the guide 32 and reciprocates almost horizontally.
I do. Next, the operation of the mechanism for driving the embroidery frame 125 will be described.
I do. As described above, the outer frame 127 and the inner frame 126 of the embroidery frame 125
The Y motor 63 shown in FIG.
Then, the Y timing belt 71 is passed through the gear 64 and the gear 68.
Operates, so that the first carrier 58 is moved to the bed housing 2.
Is guided by the Y guide shaft 57 along the opening 2c of
It is moved in the directions of the marks Y1 and Y2. Then, the first carrier 58
To the actuator connected via an X motor bracket 82, etc.
As is apparent from FIG.
Guided by the bar guide section 2d, it moves forward in the arrow Y1 direction,
It moves backward in the direction of the mark Y2. At this time, the actuator
The cover 89 moves in the direction of the arrow Y1 to the housing 1
When moving forward, the second actuator cover 107
The embroidery frame 125 advances in the direction of the arrow Y1 and is further held by the embroidery frame 125.
The cloth being moved forward. In this case, move forward in the direction of arrow Y1.
At the front 89a of the actuator cover 89, the cloth of the embroidery frame 125
Pressed. Also, the actuator cover 89 points in the direction of the arrow Y2.
When moving back to the housing 1
2 Actuator cover 107, embroidery frame 125 in the direction of arrow Y2
The cloth held back by the embroidery frame 125 also moves backward. This
When the actuator cover 89 moves forward and backward as shown in
The opening 2c remains covered with the actuator cover 89
It is. When the X motor 85 is driven, the gear 92, the timing
The X timing belt 102 operates via the pulley 79.
Therefore, the embroidery frame holder 104 and, consequently, the embroidery frame 125 are X-guided.
Guided by the shaft 84, it is moved in the directions of the arrows X1 and X2.
You. When the embroidery frame 125 moves, it is obvious from FIG.
As described above, one end of the X motor bracket 82 is
A is guided to the guide shaft 84 through the
A motor attached to the vertical wall 82c at the other end of the motor bracket 82
Roller roller 106 is located on the upper surface of bed 2a of bed housing 2.
In the direction parallel to the axis of the Y guide shaft 57
You. (Effect) In the present embodiment, as described above, the actuator cover
The length L1 in the Y direction of 89 is the length of the opening 2c in the Y direction.
Act L2 and the forward direction of the actuator cover 89, that is, the arrow
The maximum movement stroke S1 in the Y1 direction and the actuator cover
-89 maximum retreat direction, that is, maximum movement stroke in the direction of arrow Y2
It is set to be longer than the length dimension including S2. Therefore, the actuator cover 89 moves in the direction of the arrow Y1.
Even if it moves and moves forward, the bed housing 2 of the housing 1
The opening 2c remains closed by the actuator cover 89.
It is. Similarly, the actuator cover 89 moves in the direction of arrow Y2.
Bed housing of the housing 1
Opening 2c of the actuator 2 is closed by the actuator cover 89
Remains. Therefore, dust and foreign matter outside the sewing machine
Intrusion into the housing 1 from the portion 2c can be prevented.
The oil supplied to the internal mechanism of the housing 1 is opened.
Can be prevented from scattering outside the sewing machine through section 2c.
Cloth held by the embroidery frame 125
Damage can be prevented. Conventionally used here
Unlike endless belts that have been
Even when used, actuator caps made of synthetic resin
Bar 89 does not flex or hardly flexes, so
Function to prevent dust and foreign matter from entering, and to prevent oil from scattering
Can be Also, the actuator cover 89 moves in the arrow Y1 direction.
When moving forward with respect to the housing 1,
Moves forward, and the cloth held by the embroidery frame 125 moves forward as well.
I do. In this case, the actuator that moves forward in the direction of arrow Y1
When the fabric of the embroidery frame 125 is placed on the front part 89a of the bar 89
The actuator cover 89, which moves forward in the direction of the arrow Y1.
The cloth of the embroidery frame 125 is pressed by the front part 89a. Therefore
The front 89a of the actuator cover 89 is a table that sends cloth
Can function as In this embodiment, one end of the X motor bracket 82 is
Held by the first carrier 58 guided by the guide shaft 57
And a vertical wall portion 82c at the other end of the X motor bracket 82.
Is the upper surface of the bed housing 2 via the rotating roller 106
It is configured to be guided and held along the line. Therefore, in the Y direction
As a guide shaft to be extended, one Y guide shuff
To 57 is enough. Requires exact parallelism of the guide shaft
Problem can be resolved, and the X guide shaft 84 and the first
Easy installation of rear 58, mass production and cost
Is advantageous. Also, only one Y guide shaft 57 is required.
Therefore, it is advantageous to reduce the size of the housing 1 in the width direction.
You. Further, in this embodiment, the needle bar arm 7 is pivoted about the swing shaft 15.
Because of the swinging configuration, the height of the housing 1 is also reduced.
Therefore, the housing 1 can be downsized in the width direction.
This is advantageous in reducing the size of the housing 1 as a whole.
You. In this embodiment, the movement of the first carrier 58 in the Y direction is
The embroidery frame in the X direction is performed via the Y timing belt 71.
The movement of the holder 104 is performed via the X timing belt 102.
Y timing belt 71 and X timing belt 102
Have substantially the same length. Therefore, the Y timing
The extension of the tilt 71 and the extension of the X timing belt 102 are almost the same.
This is advantageous for suppressing embroidery pattern collapse. According to the sewing machine of the present invention, the actuator cover
The length of the carrier in the carrier movement direction is
Direction and the maximum movement distance of the actuator cover.
It is set longer than the length dimension including the troke
It is characterized by the following. Therefore, the actuator cover
Always covers the opening, even if is moved forward or backward
be able to. Therefore, dust and foreign matter outside the sewing machine
It can be prevented from entering the housing from the part. Also
Oil from the internal mechanism of the housing passes through the opening to the outside of the sewing machine
Can be prevented from being scattered, so it is held by the embroidery frame
To prevent the cloth from becoming dirty by splashing oil.
Can be.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 shows an embodiment of the present invention. FIG. 1 is a perspective view showing the entire appearance of a sewing machine, FIG. 2 is a top view of the sewing machine, and FIG. FIG. 4 is a plan view showing a partial cross section and a partial cutaway, and FIG.
6 is a sectional view taken along the line VI-VI in FIG. 2, FIG. 7 is a sectional view taken along the line VII-VII in FIG. 2, and FIG. 8 is embroidery. It is an exploded perspective view of a frame. FIG. 9 is a side view with a part removed. In the drawing, 1 is a housing, 2c is an opening, 2d is a cover guide, 49 is a first actuator, 58 is a first carrier, 75
Is the second actuator section, 89 is the actuator cover, 10
Reference numeral 7 denotes a second actuator cover.

Claims (1)

(57) [Claims] A housing having an opening formed in the center of the carrier moving direction and a cover guide extending along the carrier moving direction; and an actuator having a carrier held in the housing and moving along the carrier moving direction. And movably attached to the cover guide portion of the housing,
The housing is connected to the carrier and moves with the carrier in at least one of a forward direction and a backward direction with respect to the housing along a direction in which the cover guide extends, and projects from at least one of a front end and a rear end of the housing by the movement. The length of the actuator cover in the carrier movement direction is the same as the length of the opening in the carrier movement direction in order to secure the closeability of the opening during the movement of the carrier. A sewing machine characterized in that the length is set to be longer than a length obtained by adding the maximum movement stroke of the actuator cover.