JPH06254279A - Sewing machine - Google Patents

Abstract

PURPOSE:To prevent a wiper member and sewing needle from being damaged even when a defective motion such as the wiper member does not return to the original position before the motion is generated by prohibiting the vertical motion of the sewing needle when the returning of the wiper member to the position before the motion is not detected by a detecting means. CONSTITUTION:A wiper sensor 71 which is arranged on the left side of a rotary solenoid 64 of a sewing machine arm 3 detects that a wiper member 68 is located at a position before an operation, and outputs a detecting signal. When the wiper member 68 has not returned to the position before an operation for some reason, even when a command to resume a sewing operation is generated, a control unit prohibits the vertical motion of a sewing needle 6 until the detecting signal of that the wiper member 68 returns to the position before an operation is received from the wiper sensor 71. Also, the control unit prohibits a retracting motion of a cloth holder 20 to be lifted to the retracting position until the detecting signal of that the wiper member 68 returns to the position before an operation is received from the wiper sensor 71.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention comprises a wiper member for removing the end portion of the upper thread from the cloth after the thread cutting operation of the upper thread and guiding it by the thread grip, and a wiper drive device for driving the wiper member. Regarding sewing machine.

[0002]

2. Description of the Related Art In a sewing machine of this type, for example, an embroidery sewing machine, a wiper member is provided on the back side of a sewing machine arm so as to be capable of reciprocating in an obliquely vertical direction, and a rotary solenoid is used as a wiper drive device for driving the wiper member. It is provided. In the case of this configuration, after the thread cutting operation of the upper thread, the rotary solenoid is energized to move the wiper member obliquely downward so that the upper thread is hooked on the thread hooking portion provided at the tip of the wiper member. Hook. Then, after that, when the rotary solenoid is de-energized, the return spring causes the wiper member to return and move diagonally upward, and at this time, the hook portion of the wiper member moves diagonally upward while hooking the upper thread, and thus is cut. The end of the upper thread is wiped from the cloth, and is guided and held by the thread clamp.

[0003]

However, in the above-mentioned conventional configuration, after the rotary solenoid is energized to operate the wiper member, the wiper member has not returned to the position before the operation due to some cause (for example, thread trimming). If a defect occurs and the upper thread is not cut, the wiper member cannot return to the position before operation.)
When the sewing operation is restarted, the sewing needle and the needle bar may collide with the wiper member that has not returned to the pre-operation position, resulting in damage to the wiper member or the sewing needle.

Further, the embroidery sewing machine is constructed so that the cloth presser is moved up and down in conjunction with the vertical movement of the sewing needle, and the cloth presser is raised to the retracted position when the needle bar is selected and replaced. Is configured to let. In this case, if the wiper member has not returned to the position before the operation for some reason as described above, when the cloth presser is raised to the retracted position, the cloth presser collides with the wiper member and the wiper member or the cloth is pressed. There was also a problem that the presser foot was damaged.

Therefore, an object of the present invention is to ensure that the wiper member and the sewing needle are damaged even if a malfunction occurs in which the wiper member does not return to its pre-operation position for some reason after the wiper member is operated. It is to provide a sewing machine that can be prevented. Another object of the present invention is to reliably prevent damage to the wiper member and the cloth presser when the wiper member malfunctions in the sewing machine provided with the cloth presser that moves up and down in conjunction with the vertical movement of the sewing needle. To provide sewing machines that can.

[0006]

A sewing machine according to the present invention performs sewing while moving a sewing needle up and down, and after the thread cutting operation of the upper thread, the end portion of the upper thread is wiped from the cloth and the thread is grasped. A sewing machine including a wiper member that leads to the wiper member and a wiper drive device that drives the wiper member, is provided with a detection unit that detects that the wiper member has returned to a position before operation, and the detection unit causes the wiper member to be detected. Is characterized in that it is provided with operation control means for prohibiting the vertical movement of the sewing needle when it is not detected that it has returned to the position before the operation.

Further, a cloth presser which is moved up and down in conjunction with the vertical movement of the sewing needle is provided, and a retracting drive means for raising the cloth presser to a retracted position is further provided, and the wiper member is operated by the detecting means. When it is not detected that the vehicle has returned to the previous position, the operation control unit may control the operation of the retract drive unit to be prohibited.

[0008]

According to the above means, when the detecting means does not detect that the wiper member has returned to the position before the operation, the sewing needle is prevented from moving up and down. Even if a malfunction which does not recover is not recovered, the sewing needle and the needle bar do not collide with the wiper member, and the wiper member and the sewing needle can be reliably prevented from being damaged.

Further, in the sewing machine provided with the cloth presser which is moved up and down in conjunction with the vertical movement of the sewing needle, when the detecting means does not detect that the wiper member has returned to the position before the operation, the cloth presser is moved to the retracted position. Since the operation of the evacuation drive means for raising is prohibited, even if a malfunction occurs in which the wiper member does not return to the pre-operation position for some reason, the cloth retainer does not collide with the wiper member and the wiper member and the cloth It is possible to reliably prevent the presser foot from being damaged.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment in which the present invention is applied to an embroidery sewing machine will be described below with reference to the drawings. First, in FIG. 3 showing the overall structure of the embroidery sewing machine, the sewing machine main body 1 is
The sewing machine arm 2 is integrally provided on the sewing machine table 2. A needle bar support case 5 having a plurality of needle bars 4, for example, six in this case, is provided at the tip of the sewing machine arm 3.

The above six needle bars 4 are vertically movably supported side by side in the needle bar support case 5 side by side (forward and backward), and are arranged at the lower end portion projecting downward from the needle bar support case 5. Has a sewing needle 6 attached thereto. An embroidery thread (not shown), which is an upper thread having a different color or type, is supplied to each sewing needle 6 from a thread supply source (not shown).

The needle bar support case 5 is attached to the sewing machine arm 3 so as to be movable in the front-rear direction (the direction in which the needle bars 4 are arranged), and is moved and driven by the needle bar selection motor 7. A driving mechanism for transmitting the rotational driving force of the sewing machine motor 8 to the needle bar 4 and moving the needle bar 4 up and down is provided in the sewing machine arm 3. This driving force is transmitted only to the needle bar 4 located at a predetermined use position, and only one of the six needle bars 4 is selectively driven. Is configured.

On the other hand, the sewing machine table 2 is provided with a sewing machine bed portion 9 located below the needle bar 4, and in the sewing machine bed portion 9 in cooperation with the sewing needle 6, the embroidery frame 1 is provided.
A hook (not shown), which is a thread catcher for forming embroidery stitches, is provided on the work cloth 11 supported by 0.
This shuttle is rotationally driven by a sewing machine motor 8 in synchronization with the vertical movement of the sewing needle 6. Further, a needle plate, a needle thread cutting device, etc. are provided above the shuttle. Further, the sewing machine table 2 is provided with a horizontal movement mechanism 12 for freely moving and driving the embroidery frame 10 in the X-axis direction (front-back direction) and the Y-axis direction (left-right direction).

The horizontal moving mechanism 12 includes a Y-axis direction moving frame 14 which is driven and moved in the Y-axis direction by a Y-axis feed motor 13 (see FIG. 8) and an X-axis by a X-axis feed motor 15 (see FIG. 8). And an X-axis direction moving frame 16 which is driven to move in the direction.

As shown in FIG. 4, a cloth pressing bar 17 is vertically movable at the tip of the sewing machine arm 3. In this case, the upper end side of the presser bar 17 is fitted to the cylindrical support portion 18 provided in the upper part inside the sewing machine arm part 3, and the lower end side is provided on the lower side wall part 19 of the sewing machine arm part 3. By being inserted into the through hole portion 19a, it is supported so as to be vertically movable. As shown in FIG. 5, a cloth retainer 20 is attached to the lower end portion of the cloth retainer bar 17 by screwing. A cloth presser portion 21 having a through hole for inserting the sewing needle 6 is formed at the lower end of the cloth presser 20.

Further, a cloth pressing bar holder 22 is fixed to the intermediate portion of the cloth pressing bar 17 by screwing. A movable member 23, which is a movable member, is provided so as to be movable up and down in relation to the intermediate portion of the pressure rod 17. Specifically, the presser foot actuating body 23 has a vertically long rectangular frame shape, and has an upper wall portion 23a and a lower wall portion 23b.
The presser bar 17 is inserted into the through holes formed in each of the upper and lower surfaces of the lower wall 23b and the lower surface of the presser bar holder 22 is brought into contact with the upper surface of the lower wall 23b via an O-ring 24. There is.

Then, the upper wall portion 23a of the work clamp body 23
A first compression coil spring 25 is provided between and the upper surface of the presser bar embrace 22. The first compression coil spring 25 always urges the lower surface of the presser bar retainer 22 to abut the lower wall portion 23b of the presser foot actuating body 23. The side wall portion 23c on the right side of FIG.
A lower end portion 26a of the cloth pressing operation link 26 is rotatably connected to the. As shown in FIG. 5, one end portion 27a of a substantially L-shaped cloth pressing drive link 27 is rotatably connected to an upper end portion 26b of the cloth pressing operation link 26. The presser foot drive link 27 is supported by the sewing machine arm 3 so as to be rotatable around a shaft 28 as a fulcrum. A motion converting member 29 is composed of the above-described cloth-pressing operation link 26 and the cloth-pressing drive link 27.

On the other hand, a main shaft 30 which is rotationally driven by the sewing machine motor 8 is arranged in the upper portion of the sewing machine arm portion 3, and a cloth pressing drive cam 31 is provided at the tip of the main shaft 30.
Are fixed so that they rotate together. As shown in FIG. 5, the outer peripheral surface of the presser foot drive cam 31 is
Cam groove 31 for presser foot for driving the presser foot 20 on the right side
a is formed and a balance (not shown) on the left side
A balance cam groove 31b for driving the.

A cam follower 32 provided at the other end 27b of the cloth pressing drive link 27 is fitted and connected in the cloth pressing cam groove 31a. As a result, the motion converting member 29, that is, the cloth pressing actuating link 26 and the cloth pressing driving link 27, causes the cloth pressing operating body 23 and the cloth pressing driving cam 3 to move.
It is connected to the first presser foot cam groove 31a. Further, a second compression coil spring 34 is provided between the upper side wall portion 33 of the sewing machine arm portion 3 and the upper wall portion 23 a of the cloth pressing member 23.

The second compression coil spring 34 has a stronger spring force than that of the first compression coil spring 25, and by urging the presser foot actuating member 23 downward,
The presser foot drive link 27 is urged to rotate counterclockwise in FIG. 5, and its cam follower 32 is always urged to abut the cam surface of the cam groove 31a (in this case, the inner surface on the left side in FIG. 5). ing.

In this structure, when the presser foot drive cam 31 is driven to rotate, the cam follower 32 moves left and right according to the shape of the cam surface while contacting the cam surface of the cam groove 31a, and the presser foot is pressed. The drive link 27 swings with the shaft 28 as a pivot. Then, the swing of the cloth pressing drive link 27 is transmitted to the cloth pressing operating body 23 via the cloth pressing operating link 26, and the cloth pressing operating body 23 moves up and down,
The presser bar 17 and the presser bar 20 are configured to reciprocate in the vertical direction between the lowermost position shown in FIG. 5 and the uppermost position shown in FIG.

Further, the cam groove 3 of the cloth pressing drive cam 31.
A retracting groove 31c is provided on the opposite side of the cam surface of 1a, as shown in FIGS. This escape groove 31c
When the presser foot 20 and the cloth presser bar 17 are located at the uppermost position shown in FIG.
Move in the middle right direction, and as shown in FIG. 7, the escape groove 31a
It is set so that it can be retracted inside.

On the other hand, on the right side portion of the right side wall portion 35 of the sewing machine arm portion 3 in FIG. 4, for example, a rotary solenoid 36 which is a retracting drive means is arranged. A rotary shaft 37 of the rotary solenoid 36 projects into the sewing machine arm portion 3, and a cloth presser retract lever 38 is connected to the tip end portion thereof. An engaging piece portion 38a is bent and formed at a right angle to the left side in FIG.
In this case, in order to raise the cloth presser 20 to the retracted position shown in FIG. 7, after the cloth presser 20 and the cloth presser bar 17 are located at the uppermost position shown in FIG. 6, the rotary solenoid 36 is driven to move the cloth presser. The retracting lever 38 is rotated counterclockwise in FIG. As a result, the engaging piece portion 38a of the cloth pressing lever retracting lever 38 comes into contact with the pressing portion 27c (see FIG. 4) formed on the other end portion 27b side of the cloth pressing drive link 27, and the pressing portion 27c is shown. 6 Push right in the middle. As a result, the presser foot drive link 27 rotates clockwise about the shaft 28 as a fulcrum, and the cam follower 32 causes the retracting groove 31 to move, as shown in FIG.
It is configured such that it enters the inside of c and is retracted, so that the presser foot 20 and the presser bar 17 are raised to the retracted position.

A thread wiping device 61 as shown in FIG. 1 is arranged on the left side surface in FIG. 3 of the tip of the sewing machine arm 3. The thread wiping device 61 is a device for wiping the end portion of the cut upper thread from the cloth after the thread cutting operation of the upper thread after the sewing operation and guiding it to the thread grip 62. The thread wiping device 61 will be specifically described below. A support plate 63 of the thread wiping device 61 is attached and fixed to the left side surface of the sewing machine arm portion 3 in FIG. 3, and a wiper drive device such as a rotary solenoid 64 is attached to the support plate 63. . A guide portion 63a is formed in the lower portion of the support plate 63 so as to extend obliquely downward, and a guide groove 63b having a long hole is formed in the guide portion 63a.

Further, one end of a lever 66 is connected to the rotary shaft 65 of the rotary solenoid 64, and the other end of the lever 66 is rotatably connected to the upper end of a connecting member 67. A wiper member 68 is fastened and fixed to the lower end portion of the connecting member 67 with a screw 69, and the screw 69 is fitted in the guide groove 63b of the support plate 63. At the lower end of the wiper member 68, the hook member 6
8a is attached, and a hook portion 68b for hooking and catching the thread is formed at the tip of the hook member 68a as shown in FIG.

In the case of this configuration, the rotary solenoid 64
When the motor is energized, the rotating shaft 65 and the lever 66 are moved to the position shown in FIG.
By rotating in the counterclockwise direction, the connecting member 67 and the wiper member 68 are guided by the guide groove 63b and move obliquely downward as shown in FIG. As a result, the hook portion 68b of the hook member 68a of the wiper member 68 hooks the upper thread extending from the eyelet hole of the sewing needle 6 to the cloth side. After that, when the rotary solenoid 64 is cut off, the rotating shaft 65 and the lever 66 are rotated clockwise in FIG. 2 by the spring force of the return spring built in the rotary solenoid 64, and the connecting member 67 is rotated.
Also, the wiper member 68 is guided by the guide groove 63b and moves obliquely upward to return to the position before the operation (see FIG. 1). Thereby, the hook portion 68a of the wiper member 68
1 pulls the upper thread upward while hooking the upper thread to the thread grip 62, and as shown in FIG. 1, ends 70 of the cut upper thread.
Is gripped by the thread clamp 62.

Here, a wiper sensor 71 as a detecting means is arranged on the left side of the rotary solenoid 64 in the sewing machine arm portion 3 in FIG. 1 (see FIG. 2). In this case, the wiper sensor 71 is composed of an optical sensor such as a photocoupler, and has a substrate 72 and a mounting plate 73.
It is attached to the sewing machine arm section 3 via. The wiper sensor 71 detects that the other end of the lever 66 is located at the position shown in FIG. 1, that is, the wiper member 68 is located at the position before actuation, and outputs a detection signal. Is configured to.

FIG. 8 showing the electrical construction of the embroidery sewing machine.
3 is a control device including a microcomputer, etc.
9 is for controlling the overall operation of embroidery sewing, and CP
It comprises a U 40, a ROM 41 and a RAM 42, and a bus 43 connecting them, and an input interface 44 and an output interface 45 are further connected to the bus 43. The control device 39 constitutes operation control means. An operation control program is stored in the ROM 41, and the RAM 42 is stored.
Various data such as embroidery data for performing embroidery sewing is stored therein.

Further, the output interface 45 includes a sewing machine motor 8, an X-axis feed motor 15, and a Y-axis feed motor 1.
3, motor drive circuits 46 to 49 for respectively driving the needle bar selection motor 7 are connected, and the CPU 40 reads R
The embroidery sewing operation for the work cloth 11 is executed by driving and controlling the motors based on the operation control program in the OM 41 and the embroidery data in the RAM 42. The output interface 45 is connected to a display drive circuit 52 that drives a display device 51 for displaying embroidery figures and various messages, and solenoid drive circuits 53 and 74 that drive the rotary solenoids 36 and 64. There is.

On the other hand, the input interface 44 detects an external storage device 54 such as a floppy disk for storing embroidery data, a keyboard 55 provided with various input keys such as a start key, and a rotation angle of the spindle 30. The rotation angle sensor 56 and the wiper sensor 71 are connected. The rotation angle sensor 56 is composed of, for example, a rotary encoder, and the rotation angle of the main shaft 30 (rotation angle with the top dead center of the needle bar 4 as the origin (0 °)).
Is detected and a rotation angle detection signal corresponding to the rotation angle is output.

Next, the operation of the above configuration will be described with reference to FIG. First, during a normal sewing operation for embroidery, when the sewing machine motor 8 is energized to rotate the main shaft 30,
The needle bar 4 and the sewing needle 6 are driven vertically. in this case,
The locus of the vertical movement of the sewing needle 6 is shown by a curve A in FIG. The work clamp 20 is interlocked with the vertical movement of the sewing needle 6.
Moves up and down. Specifically, when the main shaft 30 rotates and the presser foot drive cam 31 is rotationally driven, the cam follower 32 moves left and right according to the shape of the cam surface while contacting the cam surface of the cam groove 31a. The presser foot drive link 27 swings around the shaft 28 as a fulcrum, and the presser foot actuating member 23 moves up and down. As a result, the cloth presser bar 17 and the cloth presser 20 move up and down between the position shown in FIG. 5 and the position shown in FIG. The locus of the vertical movement of the presser foot 20 is shown by a curve B in FIG. In FIG. 9, the curve C shows the balance thread amount, and the curve D shows the shuttle thread amount. Further, in FIG. 9, 0 ° indicates the needle bar top dead center and 180 ° indicates the needle bar bottom dead center.

When the work clamp rod 17 moves up and down as described above, the lower surface of the work clamp rod holder 22 is urged by the first compression coil spring 25 and the lower wall portion 23b of the work clamp working member 23 is pressed. And the second compression coil spring 3
The cam follower 32 of the cloth pressing drive link 27 is urged by 4 to contact the cam surface of the cloth pressing cam groove 31 a of the cloth pressing drive cam 31. In this case, the first compression coil spring 2
Reference numeral 5 is a dedicated spring for releasing the cloth pressing pressure and allowing the cloth pressing 20 to move on the step of the cloth. on the other hand,
The second compression coil spring 34 having a stronger spring force than the spring force of the first compression coil spring 25 abuts the cam follower 32 of the presser foot drive link 27 on the cam surface of the cam groove 31 a of the presser foot drive cam 31. The spring serves as a dedicated spring for allowing the work clamp 20 to move upward to the retracted position.

After the required sewing operation has been executed, the sewing machine motor 8 is stopped and the upper thread cutting device cuts the upper thread.
By this, the end of the cut upper thread is wiped from the cloth, and is guided to the thread clamp 62 and grasped. Specifically, in the state where the sewing needle 6 is located at the top dead center (state shown in FIG. 1), the rotary solenoid 64 is energized and driven, and the lever 66 rotates counterclockwise in FIG. As shown in FIG. 2, the wiper member 68 moves obliquely downward, and the hook portion 68b hooks the upper thread extending from the eyelet of the sewing needle 6 to the cloth side. After that, when the rotary solenoid 64 is cut off,
The lever 66 is rotated in the clockwise direction in FIG. 2 by the spring force of the return spring, the wiper member 68 is moved obliquely upward, and returns to the position before the operation shown in FIG. At this time, the hook portion 68b of the wiper member 68 hooks the cut upper thread and pulls it upward to guide it to the thread clamp 62. Therefore, as shown in FIG. 1, the end 70 of the upper thread is grasped by the thread clamp 62. Will be done.

For some reason, the wiper member 68 has not returned to the position before the operation (the position shown in FIG. 1) (for example, when the thread cutting failure occurs and the upper thread is not cut, the wiper member 68 is not cut). Cannot return to the position before the operation), even if a command to restart the sewing operation is generated, the control device 39 is such that the wiper sensor 71 returns the wiper member 68 to the position before the operation. Up and down movement of the sewing needle 6 is received until the detection signal is detected, that is, sewing operation (energization drive of the sewing machine motor 8)
Is prohibited.

Further, the control device 39 uses the wiper sensor 7
Until the wiper member 68 receives a detection signal detecting that the wiper member 68 has returned to the position before the operation, the retracting operation for raising the presser foot 20 to the retracted position is prohibited, that is,
The rotary solenoid 36 is configured to prohibit energization drive. By the way, when the cloth presser 20 is moved to the retracted position (see FIG. 7) while the wiper member 68 is in operation (in a state where the wiper member 68 has not returned to the position before the operation), as shown in FIG. The presser foot 20 collides with 68.

According to this embodiment having such a structure, the vertical movement of the sewing needle 6 is prohibited when the wiper sensor 71 does not detect that the wiper member 68 has returned to the position before the operation. Due to the wiper member 68
Does not return to the position before operation, even if a malfunction occurs
The sewing needle 6 and the needle bar 4 do not collide with the wiper member 68, and it is possible to reliably prevent the wiper member 68 and the sewing needle 6 from being damaged. Further, when the wiper sensor 71 does not detect that the wiper member 68 has returned to the position before the operation, the energization drive of the rotary solenoid 36 for raising the cloth presser 20 to the retracted position is prohibited. Even if the malfunction of 68 occurs, the cloth presser 20 does not collide with the wiper member 68, and the wiper member 68 and the cloth presser 20 can be reliably prevented from being damaged.

In the above embodiment, the wiper sensor 71
Although it is composed of an optical sensor, it is of course not limited to this and may be composed of, for example, a microswitch or a magnetic sensor.

[0038]

As is apparent from the above description, the present invention has a structure in which the vertical movement of the sewing needle is prohibited when the detection means does not detect that the wiper member has returned to the position before the operation. Even if a malfunction occurs in which the item does not return to the position before the operation, the sewing needle and the needle bar do not collide with the wiper member, and it is possible to reliably prevent the wiper member and the sewing needle from being damaged. Further, when the detection means does not detect that the wiper member has returned to the position before the operation, the operation of the retract drive means for raising the cloth presser to the retracted position is prohibited so that the wiper member reaches the position before the operation. Even if a malfunction that does not recover occurs, the cloth presser does not collide with the wiper member, and it is possible to reliably prevent the wiper member and the cloth presser from being damaged.

[Brief description of drawings]

FIG. 1 is a rear view of the periphery of a thread wiping device showing an embodiment of the present invention.

FIG. 2 is a view corresponding to FIG. 1 showing a state in which a wiper member is activated.

FIG. 3 is a perspective view of the entire sewing machine.

FIG. 4 is a vertical sectional side view of a sewing machine arm.

FIG. 5 is a front view showing a drive mechanism of the presser foot and the presser foot.

FIG. 6 is a view corresponding to FIG. 5 showing a state where the work clamp is moved to the uppermost position.

FIG. 7 is a view corresponding to FIG. 5, showing a state where the work clamp is raised to the retracted position.

FIG. 8 is a block diagram.

FIG. 9 is a view showing the loci of vertical movements of the sewing needle and the presser foot.

FIG. 10 is a partial top view of a wiper member.

[Explanation of symbols]

1 is a sewing machine main body, 3 is a sewing machine arm, 4 is a needle bar, 6 is a sewing needle, 8 is a sewing machine motor, 9 is a sewing machine bed, 10 is an embroidery frame, 11 is a work cloth, 12 is a horizontal movement mechanism, and 17 is cloth. A presser bar, 20 is a presser foot, 29 is a motion converting member, 30 is a main shaft, 31 is a presser foot drive cam, 36 is a rotary solenoid (retraction drive means), 39 is a control device (operation control means),
Reference numeral 61 is a thread wiping device, 64 is a rotary solenoid (wiper drive device), 66 is a lever, 67 is a connecting member, 68 is a wiper member, 68a is a hook member, 68b is a hook portion, and 71 is a wiper sensor (detection means). .

Claims (2)

[Claims] 1. A sewing machine for performing sewing while moving a sewing needle up and down, and a wiper member for removing the end portion of the upper thread from the cloth and guiding it by the thread clamp after the thread cutting operation of the upper thread, and the wiper member. In a sewing machine including a wiper driving device that drives, a detection unit that detects that the wiper member has returned to the position before the operation, and a detection unit that detects that the wiper member has returned to the position before the operation The sewing machine is further provided with operation control means for prohibiting the vertical movement of the sewing needle when it is not performed. 2. A cloth presser that is moved up and down in association with the vertical movement of the sewing needle, and a retracting drive unit that raises the cloth presser to a retracted position. The operation control unit is configured to detect the wiper by the detection unit. 2. The sewing machine according to claim 1, wherein the operation of the retracting drive means is prohibited when it is not detected that the member has returned to the position before the operation.