JPH04152968A - Sewing machine - Google Patents

Abstract

PURPOSE:To reduce the burden of an operator by constituting the sewing machine so that a vertical motion mechanism for giving a vertical motion to a feed dog is driven by an exclusive driving source being independent from other driving system. CONSTITUTION:In the sewing machine provided with a needle bar 30 provided with a sewing needle 28 and subjected to reciprocating motion vertically, a vertical motion mechanism 44 for giving a vertical motion to a feed dog 36 of working cloth 35 at almost the same timing with this needle bar 3O, and a forward/backward motion mechanism 44 for giving a forward/backward motion to the feed dog 36 at almost the same timing as the needle bar 30, it is constituted so that the vertical motion mechanism 44 of the feed dog 36 is driven by an exclusive driving source 72 being independent from other driving system. Also, this sewing machine is provided with a storage means 12 for storing various pattern data 91, and a control means 80 for controlling the driving source 72 of the vertical motion mechanism 44, based on this pattern data 91, and when the pattern which does not necessitate to feed working cloth 35 by the feed dog 36 is selected, the feed dog 56 is separated from the working cloth 36 by controlling the driving source 72. Moreover, in the case the feed amount in the pattern data 91 is '0', the vertical motion of the feed dog 36 is stopped. In such a way, a burden of an operator's operation is reduced and the power consumption energy is reduced.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application This invention relates to a fabric feeding mechanism that transports a workpiece cloth in a desired direction, in which a vertical movement mechanism that vertically moves a feed dog provided in the mechanism is connected to another drive. This invention relates to a sewing machine configured to be driven by a dedicated drive source independent of the system.

Prior Art Sewing machines that perform straight stitches, zigzag stitches, and various other pattern stitches swing the needle bar equipped with the sewing needle as necessary during sewing operation, and also have a needle bar equipped with a needle on the needle plate that can move vertically and backwards and forwards. The facing feed dog imparts the required feed movement to the workpiece cloth, making it possible to perform straight stitches and various other pattern stitches. In this case, each mechanism that gives the feed dog back-and-forth movement and vertical movement is connected to the sewing machine motor via a mechanical linking means, and is driven in conjunction with the needle bar.

Recently, in addition to sewing machines in which the vertical movement mechanism and the longitudinal movement mechanism of the feed dog are commonly driven by a sewing machine motor, sewing machines in which the longitudinal movement mechanism is driven by a dedicated pulse motor have been put into practical use. ing. However, in either case, as described above, the vertical movement mechanism of the feed dog is mechanically connected to the lower shaft rotated by the sewing machine motor via a linking means such as a cam, and is driven in conjunction with the drive of the hook. The feed dog is configured to be given vertical movement.

By the way, the above-mentioned sewing machine does not always require the workpiece cloth to be transported by the feed dog during sewing operation, and when sewing is performed without transporting the workpiece cloth by the feed dog, for example, when sewing buttons, darning, etc. It is also carried out, although less frequently. In this way, when the feed dog does not require feeding, there is a necessary force of 1 to separate the feed dog from the work cloth and stop its vertical movement.

Therefore, conventional sewing machines have been provided with a drop mechanism that releases the connection with the lower shaft of the connecting means connected to the vertical movement mechanism of the feed dog and lowers the feed dog from the upper surface of the throat plate. That is, when performing sewing such as attaching buttons or darning as described above, it is necessary to operate the drop mechanism in advance to lower the feed dog from the upper surface of the throat plate, and to stop the vertical movement at this position.

Note that a sewing machine has been implemented in which an embroidery frame is attached to the sewing machine and the embroidery frame is moved in the X-Y direction to perform required embroidery stitches on a workpiece cloth stretched over the embroidery frame. When performing embroidery stitching, the work cloth is fed by the embroidery frame, so there is no need to drive the feed dog. Therefore, when sewing embroidery, the drop mechanism is operated to stop the vertical movement of the feed dog.

Problems to be Solved by the Invention However, since the drop mechanism is mechanically connected to the lower shaft, the operating member of the drop mechanism is often structurally provided on the back side of the sewing machine, making it difficult for beginners to operate it. It had some serious drawbacks. Further, since this drop mechanism is used only for limited purposes such as button attachment, darning, and embroidery sewing, it is often forgotten to operate the drop mechanism. In this case, problems such as not being able to perform accurate sewing or the stitches becoming dirty arise due to improper operation. Furthermore, even if the feed dog is lowered by operating the drop mechanism, it is necessary to operate the drop mechanism again to return it to its original position after sewing buttons etc., which increases the burden on the operator. This is the cause.

Therefore, when sewing is selected that does not require the feed of the workpiece cloth using the feed dog, the indicator light provided on the sewing machine body is lit or a message to that effect is displayed on the display to prompt the operator to operate the drop mechanism. Some have a structure that encourages them.

However, since the switching operation of the drop mechanism still relies on the manual operation of the operator, the actual situation is that the burden on the operator is not substantially reduced.

Furthermore, when sewing a workpiece fabric with a sewing machine, a seam called a "tacking stitch" is generally formed at the end of the sewing process. This tacking stitch is performed by forming a series of seams by lockstitching on the workpiece cloth, then dropping the sewing needle several times at the same position (feed amount 0) on the workpiece cloth and repeating the normal seam formation. It is done.

However, even when performing tie stitching with a feed amount of 0, since the feed dog has vertical motion, vibrations may be transmitted to the fabric to be processed, resulting in inaccurate sewing, or the feed dog may move unnecessarily, causing waste. Difficulties such as increased amount of electricity have been pointed out.

Purpose of the Invention The present invention has been proposed in view of the above-mentioned problems and to suitably solve the problems. The purpose of the present invention is to provide a means for automatically stopping the system to reduce the operational burden on the operator and reduce power consumption.

Means for Solving the Problems In order to overcome the above-mentioned problems and achieve the intended purpose, the present invention provides a needle bar equipped with a sewing needle and reciprocated up and down by rotation of a main shaft by a sewing machine motor; A sewing machine equipped with a vertical movement mechanism that causes a vertical movement of a feed dog for a work cloth in synchronization with the needle bar, and a back and forth movement mechanism that causes a back and forth movement of the feed dog approximately in time with the needle bar. The driving mechanism is characterized in that it is configured to be driven by a dedicated drive source that is independent from other drive systems.

According to the present invention, when sewing is selected that does not require the feed of the work cloth by the feed dog, the feed neck is lowered from the upper surface of the throat plate and held in the inactive state of vertical movement, and the When sewing is finished, it automatically returns to its original state. Further, when the feed amount in the pattern data is 0, the vertical movement mechanism of the feed dog is automatically stopped.

Embodiments Next, preferred embodiments of the sewing machine according to the present invention will be described below with reference to the accompanying drawings.

(About the general structure of the sewing machine) FIG. 4 shows an electronically controlled pattern stitch sewing machine, in which the sewing machine head 24 has a needle bar 3 with a sewing needle 28 attached to the lower end.
0 is provided, and is given vertical movement by a known needle bar vertical movement mechanism, and is also swingable left and right by a required center angle by a known needle bar swing mechanism. The main body of the sewing machine 10 includes a pattern display section 14 that displays patterns stored in a ROM 12 (described later), a pattern selection operation section 16 that includes known operation switches that select these patterns, and a pattern display section 16 that displays selected patterns, etc. A display unit 18 such as a liquid crystal display for confirmation is provided.

In addition, the normal sewing mode switch 2 is located close to the display section 18.
A sewing machine motor 8 shown in FIG.
Start/stop switch 26 for controlling start and stop of 2
is installed.

In the normal sewing mode, the sewing machine 10 of the embodiment performs normal pattern sewing in which letters and patterns are sewn by a swinging and feeding mechanism, and in the embroidery sewing mode, an embroidery frame (not shown) is attached to the sewing machine and the embroidery is sewn. Embroidery stitching can be performed by driving the frame in the X-Y directions.

(Regarding the feeding mechanism of the feeding dog) A throat plate 34 is disposed in the bed portion 32 of the sewing machine 10.
The processing cloth 35 is inserted into the slit 34a formed in the throat plate 34.
A feed dog 36 for feeding the paper in the vertical and front-back directions faces forward. The feed dog 36 is connected to a feed mechanism 38 that operates substantially in synchronization with the needle bar 30. This feeding mechanism 38
As shown in FIG. 1, the feed base 4 supports the feed dog 36.
0, a back-and-forth movement mechanism 42 (described later) that provides horizontal back-and-forth movement to the feed dog 36, and a vertical movement mechanism 44 that provides up and down movement to the feed dog 36.

(Regarding the forward and backward movement mechanism) A base 50 is provided horizontally inside the bed portion 32,
The feed table 40 is disposed on this base 50 so as to be movable back and forth and up and down by a mechanism to be described later. That is, as shown in FIGS. 1 and 3, the feed table 40 is formed in an inverted U-shape, and the feed dog 36 is fixed to the upper surface of the upper horizontal portion 40a with a screw 46. Also, feed stand 4
The lower horizontal part 40b of 0 is formed with an overhanging part 40c that extends horizontally on the front side (the side facing the operator), and a long hole 48 in the front-rear direction is bored in this overhanging part 40c. . A guide bin 52 vertically protruding from the base plate 50 slidably faces the elongated hole 48, and when the back-and-forth movement mechanism 42 operates, the feed bar 40 acts as a guide for the bin 52 facing the elongated hole 48. It is configured to move back and forth in a straight line.

A pivot pin 5 is provided on the board 50 at a position close to the feed table 40.
6 is erected, and a horizontal arm 54 is pivotally supported on this pin 56 so as to be freely rotatable in the horizontal direction.

The second horizontal arm 54 includes a first arm portion 54a and a second arm portion 54b, each extending in opposite directions about the pivot point. The first arm portion 54a is connected to the feed base 4.
0, and its tip faces between the upper horizontal portion 40a and the lower horizontal portion 40b of the feed table 40.

Further, a vertically protruding shaft 58 is vertically fixed to the tip of the first arm portion 54a, and the upper and lower ends of this shaft 58 are connected to through holes bored in the corresponding upper and lower horizontal portions 40a and 40b. It is slidably inserted into the. Note that the upper end of the shaft 58 is also commonly inserted through a through hole bored in the feeder #36 fixed to the feeder base 40.

Further, the lower horizontal portion 40b of the feed table 40 and the first arm portion 5
．． As shown in FIG. 3, a compression spring 60 wound around the shaft 58 is elastically interposed between the shaft 58 and the shaft 58. Therefore, the feed bar 40 is always urged downward under the elastic action of the compression spring 60, and the lower surface of the overhang 40c is brought into contact with a contact member 67 provided on a vertical arm 68, which will be described later. ing.

The second arm portion 54b extends in a direction away from the feed base 40, and has a sector gear 62 integrally formed at its tip, as shown in FIG. This sector gear 62 is a motor 6 for longitudinal movement arranged vertically on the board 50.
It meshes with the pinion 66 of No. 4. Therefore, by driving the forward and backward movement motor 64, the horizontal arm 54 rotates about the pivot pin 56, and moves the feed base 40 and the feed dog 36, which are supported by the first arm portion 54a via the shaft 58, forward. and horizontally driven backwards. As mentioned above, the elongated hole 4 of the overhanging portion 40c of the feed base 40
A guide pin 52 protruding from the base plate 50 is inserted through the guide pin 8, so that the feed table 40 is guided by the guide pin 52 and moves linearly back and forth.

(Regarding the Vertical Movement Mechanism) As shown in FIGS. 1 and 3, a support piece 71 is provided at an appropriate position on the board 50, that is, at a position close to the overhanging part 40c of the feed table 40, and this support piece 71 A vertical arm 68 is rotatably supported in the vertical direction by a pivot pin 69 pushed laterally. The vertical arm 68 has a first arm portion 68a and a second arm portion 68b extending in opposite directions from each other about the pivot portion thereof. The first arm portion 688 extends toward the feed table 40 from the pivot portion as a base, and has its tip facing below the overhang portion 40c of the feed table 40.

The projecting portion 40c is biased downward under the elastic action of the compression spring 60 and comes into contact with a cylindrical contact member 67 provided at the tip of the first arm portion 68a.

Further, the second arm portion 68b of the vertical arm 68 is connected to the feed base 4.
0 and intersects with the horizontal arm 54 below. And the second arm portion 68b
A sector gear 70 integrally formed at the tip of the sewing machine is meshed with a pinion 74 of a vertical movement motor 72 disposed laterally on the sewing machine body. Therefore, this vertical movement motor 7
2, the vertical arm 68 rotates in the vertical direction about the pivot pin 69 as a fulcrum, as shown in FIGS. 5(a) and 5(b). The feed table 40 that comes into contact with the roller is driven up and down. At this time, the feed table 40 and the feed 11#36 are guided by a vertical shaft 58 provided on the first arm portion 54a of the horizontal arm 54, and move up and down while maintaining the parallel posture.

That is, when the feed cannon 40 is biased by the vertical movement mechanism 44 and given vertical motion, it is driven forward and backward by the longitudinal movement mechanism 42 in its raised and lowered positions, respectively, and thereby the bed portion The work cloth 35 placed on the cloth 32 is moved in a predetermined direction. Note that the substrate 50
In this case, a hook 78 is rotatably supported at a position close to the feed dog 36 (FIG. 2), and the hook 78 is rotationally driven by a stevening motor 76 shown in FIG. 1 disposed on the base plate 50. It has become so.

(About the electrical control system) FIG. 6 is a block diagram showing an outline of the electrical control system that controls each operating member of the sewing machine according to the embodiment, and shows a control device 80 based on a microprocessor (CPU).
It is equipped with A pattern selection operation section 16, a start/stop switch 26, an embroidery mode switch 22, a normal stitch mode switch 20, and a timing signal generator 93 are connected to the control device 80, respectively.

Furthermore, this control device 80 is connected to a motor 64 for vertically moving the feeder 36 via a drive circuit 83, a motor 72 for vertically moving the feeder 36 via the drive circuit 84, a sewing machine motor 82 via the drive circuit 81, and a drive circuit. A needle bar swing control motor 89 and a rotary hook driving stamping motor 76 are connected via a needle bar swing control motor 89 and a drive circuit 94, respectively. Note that when the sewing machine 10 according to the embodiment is set to the embroidery sewing mode,
The embroidery frame can be driven in the X-Y direction to perform embroidery stitching. Therefore, the control device 80 has an A Y-direction drive motor 87 is connected.

Further, the ROM 1.2 as a memory element stores pattern data 91 that can be selected by the pattern selection operation unit 16, and the readable/writable RAM 92 temporarily stores the results of calculations by the control device 80 and the like. By operating the pattern selection operation section 16, a code signal corresponding to the selected pattern is supplied to the control device 80. When the normal sewing mode switch 20 is operated, a signal for performing normal stitching is generated. When the embroidery stitching mode switch 22 is operated, the normal sewing mode is switched to the embroidery stitching mode. The timing signal generator 93 generates signals related to the operation timings of the sewing machine motor 82, needle bar swing control motor 89, longitudinal movement motor 64, and vertical movement motor 72 in the normal sewing mode, and also generates signals regarding the operation timing of the sewing machine motor 82, needle bar swing control motor 89, longitudinal movement motor 64, and vertical movement motor 72. In the mode, the sewing machine motor 82, needle bar swing control motor 89, embroidery frame X direction drive motor 85 and Y
A signal related to each operation timing of the directional drive motor 87 is generated.

(Regarding the flow of the control system) Next, FIG. 7 shows an operation flow when each signal is supplied to the control device 80 in the sewing machine according to the embodiment. After the sewing preparations such as threading are completed, the sewing machine 10 is
When the sewing machine starts (power is turned on) at step 101 (hereinafter "step J is referred to as Ic, J"), the normal sewing mode of 5102 is set.

Next, in 8103, the embroidery mode switch 22 is turned to O.
Check whether it is N, and if affirmative (YES), 510
4 to switch to embroidery sewing mode.

Therefore, the motor 85 is driven by the drive circuit 86 shown in FIG. 6, and the motor 87 is driven by the drive circuit 88, thereby forming an embroidery sewing machine that drives the embroidery frame in the X direction and the Y direction. In this embroidery sewing mode, the work cloth is driven in the X-Y direction by the embroidery frame, so it is not necessary to drive the feed fr36. Therefore, in step 5122, stopping of the vertical movement motor 72 and the longitudinal movement motor 74 of the feed dog 36 is controlled.

Next, in step 5105, operate the pattern selection operation section 16 and select the ROM.
After selecting the desired pattern from the various patterns stored in step 12,
At step 5106, it is confirmed whether the start/stop switch 26 is turned on, and if it is affirmative (YES), the sewing machine motor 82 is driven via the drive circuit 81 at 1fs107. Then, in 3108, the embroidery frame is driven in the X-Y direction based on the selected pattern data 91 to perform the required sewing. At this time, as described above, the vertical and longitudinal movements of the feed dog 36 are stopped.

Then, in 5109, the start/stop switch 26 is turned on again.
If the answer is negative (No), the process moves to 5112 to check whether the pattern data 91 in the ROM 12 has been completed. If not completed (No), 510
Returning to step 8, the sewing machine motor 82 and the embroidery frame are continued to be driven to perform sewing, and if it is affirmative (YES) that the pattern data 91 has been completed in step 5112, the driving of the sewing machine motor 82 is stopped in step 5110.

Further, in step 5111, it is checked whether the 1 normal sewing mode switch 20 is turned on, and if the answer is affirmative (YES), the process returns to step 5102. Then, it is checked in 5103 whether the embroidery sewing mode switch 22 is ON, and if it is negative (NO), the normal sewing mode is set, so in this case, 511
Move to 3. After operating the pattern selection operation unit 16 in step 5113 to select a desired pattern from the various patterns stored in the ROM 12, check whether the start/stop switch 26 is turned on.
Confirmation is made in step 114, and if affirmative (YES), the process moves to step S115, and the sewing machine motor 82 is driven.

Next, in 5116, it is confirmed whether the feed amount of the pattern data is 0, and if negative (No), the process moves to 5118.
The forward and backward movement motor 64 and the vertical movement motor 72 of the feed dog 36 are respectively driven to give the required feed to the workpiece cloth, thereby performing normal sewing. Next, it is checked in 5119 whether the start/stop switch 26 has been turned on, and if the answer is negative (No), it is checked in 5120 whether the pattern data 91 in the ROM 12 has been completed. If it has not finished (NO
), returns to 5116 to continue sewing by driving the sewing machine motor 82, and confirms the completion of the pattern data 91 (YES).
), the driving of the sewing machine motor 82 is stopped at 5121 and the process returns to S]02.

Also, in step 5116, the pattern data sending amount is O (affirmative).
If YES)), stop the motor 64 for moving the feed dog 36 back and forth in step S17, and drive the vertical movement motor 72 to stop the feed dog 36 at a position lowered from the upper surface of the throat plate 34. Required sewing is performed without applying feed to the work cloth 35. After that, 5119.
Return from 3120 to 5116 or proceed to 5121 and return.

Effects of the Embodiment Next, the actual use of the sewing machine according to the embodiment will be explained.

Prior to operating the sewing machine 10, the pattern selection operation section 6 is operated to input a desired pattern to be sewn.

The pattern selected by this input is displayed on the display section 1, for example.
8 is displayed. In addition, the normal sewing mode switch 2
0 or the embroidery mode switch 22 is selected and turned on.

Here, when the embroidery sewing mode switch 22 is turned on, this signal is input to the control device 80, and the control device 80 controls to stop the vertical movement motor 72 and the longitudinal movement motor 64 of the feed warehouse 36. do. Next, in accordance with the control program stored in the ROM 12, the sewing machine motor 82 is driven via the drive circuit 81 to input a start signal to the control device 80 by operating the start/stop switch 26. It is moved up and down. Also, R.O.
According to the pattern data 91 stored in M12, the needle bar swing control motor 89 is driven by the drive circuit 90, and the needle bar 30
is swung in a direction perpendicular to the cloth feeding direction. Furthermore, the embroidery frame's X-direction drive motor 85 is driven via a drive circuit 86 and the Y-direction drive motor 87 is driven via a drive circuit 88 according to the pattern data 9] stored in R2M17.

By the vertical movement and rocking of the needle bar 30 and the movement of the embroidery frame in the X and Y directions, which are controlled in advance in this way, the work cloth 35 attached to the embroidery frame has various patterns according to the pattern data 91. The embroidery is sewn one after another. In addition, the feed dog 36
The vertical movement motor 85 and the longitudinal movement motor 87 are controlled to stop at the position where the feed dog 36 is lowered from the upper surface of the throat plate 34 while the embroidery sewing mode is set.

Next, when the normal sewing mode switch 20 is turned on and the signal is input to the control device 80, the normal sewing mode is set. Next, the start/stop switch 26
When the start signal is input to the control device 80 by operating the
According to the control program stored in the ROM 12, the sewing machine motor 82 is driven via the drive circuit 81 to rotate the needle bar 3.
0 is raised and lowered. Also, according to the pattern data 91 stored in the ROM 12, the needle bar swing control motor 89, the feed dog 3
6 vertical movement motor 72 and longitudinal movement motor 64,
They are driven via corresponding drive circuits 90, 84, and 83, and a predetermined pattern is sewn onto the work cloth 35 placed on the bed portion 32.

Note that when the feed amount in the pattern data 91 is 0,
For example, when tacking data is input to the control device 80, the feed dog 36 is moved from the upper surface of the throat plate 34 by the vertical movement motor 72 being driven, as shown in FIGS. 5(a) and 5(b). It is stopped in the lowered position. At this time, since the forward/backward movement motor 64 is also controlled to stop, the work cloth 35 is not transferred by the feed 1 #36, and the required sewing is performed.

As described above, in the sewing machine of this embodiment, when the embroidery frame is driven in the embroidery sewing mode and when the feed amount of pattern data is O in the normal sewing mode, the vertical movement motor 72 of the feed dog 36 and the longitudinal movement The motor 64 is controlled not to be driven. That is, for example, embroidery sewing, button attachment, etc., which conventionally required the operator to operate the drop mechanism.
When performing darning stitches, tacking stitches with a feed amount of 0 in pattern data, etc., it is possible to eliminate the need for the drop operation 36 before the feed by the operator.

It is also possible to provide a dromps inch on the sewing machine body that can disable both the vertical movement motor 72 and the longitudinal movement motor 64 of the feed dog 36, so that the operator can operate the switch at will. This is effective when feeding the work cloth manually or when using another cloth feeding attachment. Note that it is recommended that the dromps inch be canceled by operating the switch again or by selecting another pattern.

Furthermore, in this embodiment, a case has been described in which the vertical movement mechanism and the longitudinal movement mechanism of the feed dog are driven by independent dedicated motors. is applicable. Further, the hook does not need to be driven by a dedicated motor; it may be driven by a sewing machine motor as in the past.

As described in detail, according to the sewing machine of the present invention, the vertical movement mechanism for vertically moving the feed dog is configured to be driven by a dedicated drive source that is independent from other drive systems. When performing embroidery sewing, button attachment, darning, etc. that do not require manual feed, by simply selecting the pattern, it is possible to automatically control only the vertical movement mechanism of the feed dog to remain in a stopped state. , the burden on the operator can be reduced. Furthermore, since the vertical movement mechanism of the feed dog can be controlled simply by switching modes or selecting a pattern, it is possible to prevent operation errors such as forgetting to perform a drop operation as in the past. be.

In addition, when sewing with a feed amount of O in the pattern data, for example, when tacking is performed, the vertical movement of the feed dog can be automatically stopped, so the feed dog does not make unnecessary movements. , it also has the advantage of reducing power consumption.

[Brief explanation of drawings]

1 is a schematic perspective view showing a feed mechanism for a feed dog in a sewing machine according to an embodiment, FIG. 2 is a plan view of the feed mechanism shown in FIG. 1, and FIG. 3 is a feed mechanism shown in FIG. 1. front view of,
FIG. 4 is an external perspective view of the sewing machine according to the embodiment, and FIG.
a) and (b) are explanatory front views showing the state in which the vertical movement mechanism of the feed dog is driven over time, FIG. 6 is a block diagram of the control system of the sewing machine according to the embodiment, and FIG. FIG. 3 is a flowchart diagram of the sewing machine according to the example. 28... Sewing sword 30... Needle bar 5... Work cloth 4... Vertical movement mechanism 80... Control device 42... Back and forth movement mechanism 72... Vertical movement ♀-ta 82...・Sewing machine motor

Claims (1)

[Scope of Claims] [1] A needle bar (30) equipped with a sewing needle (28) and reciprocated up and down by rotation of a main shaft by a sewing machine motor (82);
The needle bar (30) is provided with a vertical movement mechanism (44) that vertically moves the feed dog (36) of the work cloth (35) when the needle bar (30) is approximately adjusted; In a sewing machine equipped with a back-and-forth movement mechanism (42) that gives a back-and-forth movement to the feed dog (36), the vertical movement mechanism (44) of the feed dog (36) is driven by a dedicated drive source (72) independent from other drive systems. A sewing machine characterized in that it is configured to be driven by. [2] Storage means (which stores various pattern data (91)
12) and the pattern data (91) in this storage means (12)
control means (80) for controlling the drive source (72) of the vertical movement mechanism (44) based on the feed dog (36);
), when a pattern that does not require feeding the work cloth (35) by the feed teeth ( ) is selected, the drive source (72) is controlled to
3. The sewing machine according to claim 1, wherein the sewing machine (36) is separated from the work cloth (35). [3] Storage means (that stores various pattern data (91)
12) and the pattern data (91) in this storage means (12)
control means (80) for controlling the drive source of the vertical movement mechanism (44) based on the vertical movement mechanism (44), and when the feed amount in the pattern data (91) is 0, the vertical movement of the feed dog (36) is stopped. 2. The sewing machine according to claim 1, wherein