JPH07241397A - Bobbin replacing device for sewing machine - Google Patents

Abstract

PURPOSE:To replace a used bobbin case 4 with a new bobbin case 4 without adding any modification to a rotating hook, a bobbin case, or a bobbin, and perform automatic replacement of the bobbins while maintaining long-kept sewing quality as it is. CONSTITUTION:A used bobbin case 4 of which bobbin yarn is consumed is held by a bobbin holding means 8 while it is removed from a rotating hook 10, and a new bobbin case 4 prepared in other work is held by the bobbin holding means 8 while it is installed inside the rotating hook 10. The bobbin holding means 8 as a movable member is actuated by an actuation mechanism 20 provided on the fixed member side, so the actuation mechanism 20 is not mounted on the movable member, thereby placement of a power supply line or pipings to the actuation mechanism 20 are performed easily by simple handling without using a rotary coupling such as a slipping mechanism.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bobbin exchanging device for a sewing machine, which is constructed such that a bobbin case for accommodating a bobbin therein is grasped for exchanging bobbins.

[0002]

2. Description of the Related Art In a sewing machine that performs sewing using an upper thread and a lower thread, particularly in an industrial sewing machine that performs high-speed sewing work, it is necessary to frequently replace a bobbin wound with a lower thread. Generally, when the bobbin thread is consumed, the operation of the sewing machine is temporarily stopped, the bobbin case is removed from the hook, and then a new bobbin case is mounted in the hook manually.
However, such a manual bobbin case replacement work is extremely inefficient and causes a decrease in productivity.

Therefore, conventionally, Japanese Patent Laid-Open No. 61-16838 has been proposed.
7, JP-A-61-168388, JP-A-6-
Japanese Patent Laid-Open No. 1-168389 and the like propose various devices configured to automatically replace the bobbin case.

[0004]

However, in the bobbin exchanging device proposed hitherto, since the hook, the bobbin and the bobbin case are formed in a special shape, the sewing operation is determined by the delicate relationship between these three parts. There is a problem that the quality is greatly affected. The sewing quality can be brought to a good condition only after it has been cultivated for many years. In addition, from the viewpoint of the economical burden on maintenance,
It is necessary to avoid the deformation of the above three parts (hook, bobbin, bobbin case) as much as possible.

Therefore, the present invention provides a bobbin changing device for a sewing machine, which can be used as it is without modifying the hook, the bobbin and the bobbin case, and can maintain good sewing quality. The purpose is to provide.

[0006]

In order to achieve the above object, a bobbin changing device for a sewing machine according to the present invention accommodates a bobbin wound with a bobbin thread inside and holds and releases the bobbin by opening and closing a lock lever. And a bobbin holding means as a moving member for reciprocating between the hook position and other working positions while holding the bobbin case. The bobbin case accommodated in the hook is held by the bobbin holding means. In the bobbin exchanging device of the sewing machine, the bobbin exchanging device is configured so that the bobbin case is pulled out of the hook by the above operation, and another bobbin case prepared at another working position is carried while being held by the bobbin holding means and mounted in the hook. The bobbin gripping means as a member includes a raising mechanism that raises and unlocks the lock lever of the bobbin case from the closed position, and the bobbin. A lock mechanism for holding the lock lever of the base at the open position, and an operating mechanism for operating the lock mechanism of the bobbin holding means and the pulling mechanism are provided on the fixed member side. .

[0007]

In the bobbin exchanging device for a sewing machine having such a structure, the bobbin case in which the lower thread is consumed is taken out from the hook while being grasped by the bobbin grasping means, and a new bobbin case prepared in another work is prepared. Is held in the shuttle while being held by the bobbin holding means.

At this time, in the process of gripping operation by the bobbin gripping means, first, the bobbin gripping means advances toward the bobbin case housed in the shuttle, and at that time, the raising mechanism of the bobbin gripping means fixes the bobbin gripping means. It is placed at the initial position by the actuating mechanism provided on the member side, and comes into close contact with the bobbin case as it is.

Then, the actuating mechanism on the side of the fixing member is driven to actuate the raising mechanism of the bobbin holding means in the initial position, whereby the lock lever of the bobbin case is raised and released. The released lock lever is held in the open position by the lock mechanism,
As a result, the entire bobbin case is gripped, and the bobbin case is pulled out or mounted as described above. Therefore, according to the present invention, the bobbin is automatically replaced without any deformation of the shuttle, the bobbin and the bobbin case.

[0010]

Embodiments of the present invention will now be described in detail with reference to the drawings. The bobbin changing device according to the present invention constitutes a part of the bobbin thread automatic feeding device shown in FIG. 1, and is arranged in an oil sump space below a sewing machine bed (not shown). . The automatic bobbin thread feeder has three working positions arranged around a predetermined base shaft 1 at a pitch of about 120 °, that is, a shuttle position (bobbin case attaching / detaching position) A as shown in FIG. The bobbin case 4 is configured to be sequentially transported between the yarn removing position B and the bobbin winding position C. In addition, the above hook position A and other 2
The two work positions B and C are arranged so as to be displaced from each other in the axial direction by a predetermined amount.

In such a bobbin thread automatic feeder, a main base 2 as a fixing member is provided in the space below the sewing machine bed, and the base shaft 1 is rotatable with respect to the main base 2. In addition to being attached, a central boss portion of a rotating arm 3 as a moving member is slidably and non-rotatably attached to the base shaft 1.
A rotation drive device (not shown) having, for example, a pulse motor is attached to the base shaft 1, and the base shaft 1 is rotated by the output of the rotation drive device.
In addition, it is configured to be rotationally driven in both forward and reverse directions in units of approximately 120 °.

Further, as shown in FIG. 3, a linear output drive source 5 including an air cylinder and an electromagnet is attached to the side surface of the main base 2.
At the tip of the output rod 5a of the linear output drive source 5,
One end of the forward-reverse lever 6 is rotatably pin-connected. The forward-reverse lever 6 extends substantially horizontally to a position above the base shaft 1, and an intermediate portion thereof is rotatably pin-coupled to the main base 2. Further, the free end portion of the forward / reverse lever 6 has an elongated hole 6 extending diagonally.
a is formed, and the pin 3a protruding from the central boss portion of the rotating arm 3 is loosely fitted into the elongated hole 6a. Therefore, the output from the linear output drive source 5 is
It is transmitted to the rotating arm 3 via the forward / backward movement lever 6, whereby the rotating arm 3 is reciprocally moved along the basic shaft 1, and the bobbin case attaching / detaching position A and the other working positions B and C are axially moved. It is configured to be moved back and forth. At this time, a coil spring 5b (see FIG. 6A) is attached to the output rod 5a of the linear output drive source 5, and the rotating arm 3 is moved toward the shuttle 10 side by the pressing force of the coil spring 5b. Is configured to be urged.

Further, bobbin holding means 8 as a moving member constituting the bobbin changing device are provided at both ends of the rotating arm 3, respectively.
The bobbin case 4 gripped by the bobbin case is accommodated in the bobbin 9 (see FIG. 3) in which the bobbin thread is wound, and the rotating arm 3 is normally and reversely rotated in units of 120 ° to attach and detach the bobbin case. It is arranged to face the shuttle 10 at the position A, face to the residual yarn removing device 11 at the residual yarn removing position B, and face to face to the lower yarn winding device 12 at the lower yarn winding position C.

Next, an embodiment of the bobbin exchanging device will be described. As the bobbin case 4, bobbin 9 and shuttle 10, the conventional bobbin case having a normal structure is used without being deformed. Therefore, although the detailed description of the structure of each of these members is omitted, the schematic structure of the bobbin case 4 will be described with reference to FIG.

As shown in FIG. 4, the bobbin case 4 has a front surface portion having a through hole 4 fitted on the spindle side of the shuttle 2.
a is provided, and the bobbin locking plate 4b is mounted so as to cover the through hole 4a from the upper side so as to slide in the direction orthogonal to the axis. The bobbin locking plate 4b is provided with a locking hole 4c at a position corresponding to the through hole 4a, and a locking claw 4d is projectingly provided at a tip end portion thereof.
And by the sliding movement of this bobbin locking plate 4b,
The arcuate side portion of the locking hole 4c reciprocates between a position that partially covers the through hole 4a and a position where the through hole 4a is fully opened. Further, at this time, the locking claw 4d is reciprocated between a position in which the bobbin 9 is disengaged from the outside of the case and is in a disengaged state with the bobbin 9 and a position in which the bobbin 9 is engaged with the bobbin 9 in a disengaged state. Is configured. Further, in the bobbin locking plate 4b, the arcuate side portion of the locking hole 4c covers a part of the through hole 4a by the urging force of a coil spring (not shown), and the locking claw 4d is provided outside the case. Is disengaged and the bobbin 9 is disengaged. When the arcuate side portion of the locking hole 4c covers part of the through hole 4a, the bobbin case 4 is held with respect to the shuttle 2 and the arcuate side portion of the locking hole 4c is transparent. When the hole 4a is opened, the bobbin case 4 can be freely detached from the shuttle 2.

On the other hand, a lock lever 4e is superposed on the surface of the bobbin locking plate 4b so as to be opened and closed. One end of the lock lever 4e is attached to the bobbin case 4
Is hinged to the front surface of the bobbin and extends from the hinge portion toward the upper surface of the bobbin locking plate 4b. By releasing the lock lever 4e, the bobbin locking plate 4b is slid so as to move backward against the biasing force of the coil spring, whereby the arcuate side portion of the locking hole 4c is disengaged from the through hole 4a. The bobbin case 4 can be detached from the shuttle 10 in a free state. At this time, the locking claw 4d engages with the bobbin 9 so that the bobbin 9 moves into the bobbin case 4.
It is configured to be gripped so as not to separate from the inside. The hole 4f provided in the lock lever 4e is
The through hole 4a and the locking hole 4c are formed in a rectangular elongated hole shape that is always open.

Next, as shown in FIGS. 3 and 5,
In the bobbin holding means 8, a rotary shaft 8b is rotatably provided between a pair of both side plates 8a, 8a arranged substantially parallel to each other, and the rotary shaft 8b is provided with the above-mentioned bobbin case 4. A lever pawl 8c is attached as a pulling mechanism that raises and unlocks the lock lever 4e from the closed position. The rotary shaft 8b penetrates the side plate 8a on one side and projects outward, and an operating piece 8Q forming a lock mechanism is fixed to an outward projecting portion of the rotary shaft 8b.

The lever claw 8c is curved in an arcuate shape on the tip side, and the curved tip end portion can be inserted into the overlapping portion of the lock lever 4e of the bobbin case 4 and the bobbin locking plate 4b. It is located in. The tip of the lever claw 8c rotates according to the locus shown by the solid line P in FIG.
By rotating c, the lock lever 4e of the bobbin case 4
Is rotated and opened according to the locus shown by the two-dot chain line Q in FIG.

At this time, the both side plates 8a, 8a are formed into a substantially rectangular side surface, and the tip edge portion thereof, that is, the edge portion facing the shuttle 10 (the left edge portion in the drawing) of the bobbin case 4. It is formed in a shape along the outer surface shape.
A detent plate (not shown) provided so as to project from the side plate 8a is inserted into the recess on the bobbin case 4 side so that the bobbin case 4 and the bobbin holding means 8 are positioned. Is configured.

More particularly, as shown in FIG. 5A, a base body 8m for receiving the opened lock lever 4e in the open position is provided between the side plates 8a, 8a. The lever receiving surface of the base body 8m is formed as an inclined surface along the lock lever 4e (two-dot chain line in FIG. 5A) in the open position, and the hole of the lock lever 4e is formed in the middle thereof. A rectangular trapezoidal convex portion 8n that enters the inside of 4f is formed. An arcuate concave portion 8p for receiving the tip portion of the lock lever 4e is formed slightly above the inclined surface of the convex portion 8n. The lock lever 4e received by the base body 8m is clamped and fixed in the open state by the pressing force from the lever claw 8c,
Thereby, the whole bobbin case 4 is grasped.

On the other hand, in particular, as shown in FIGS. 5 (b), 5 (c) and 3, in the above lock mechanism, the first actuating body which operates in conjunction with the lever claw 8c as the raising mechanism is operated. The constituent operating piece 8Q and a lock plate 8V that abuts or separates from the operating piece 8Q to lock or unlock the operating piece 8Q are provided so as to be adjacent to each other. As described above, the operating piece 8Q is fixed to the rotary shaft 8b of the lever claw 8c, and the roller 8R is rotatably attached to the swinging side end of the operating piece 8Q by the pin 8S. Also the side portion facing the above-mentioned lock plate 8V in this operating piece 8Q, engaging step 8Q _R are formed, the engaging step portion 8Q _R is formed in the side portion of the lock plate 8V side fitted with locking stepped portion 8V _R, or have been made to the structure apart.

That is, the lock plate 8V is rotatably provided on a shaft 8X provided upright on the side plate 8a, and a roller 8T is provided on the swing side thereof. A coil spring 8W is attached to the shaft 8X, and the coil spring 8W
Thus, the lock plate 8V is urged to rotate toward the operating piece 8Q. Further, a stopper pin 8Z that restricts the amount of rotation in the direction of the operating piece 8Q is provided upright on the side plate 8a on the swinging end side of the lock plate 8V. Thus the left state to the lock mechanism does not in any way an action force applied,閂状step portion 8V _R of the lock plate 8V by the turn biasing force of the coil spring 8W is the engaging step 8Q _R side of the working piece 8Q And the operating piece 8Q is locked at that position. On the other hand, when the lock plate 8V is rotated in the separating direction, both 8V _R ,
8Q _R is disengaged and the operating piece 8Q is opened.

When the operating piece 8Q and the lock plate 8V are engaged with each other in a barbed shape and are in the locked state as described above, the lever claw 8c is used to lock the lock lever 4 of the bobbin case 4.
When it is stopped at a position where e is released and gripped (the position shown by the chain double-dashed line in FIG. 5A), and when the operating piece 8Q and the lock plate 8V are separated from each other, the lever claw 8c moves the bobbin case. 4 is arranged at an initial position (position shown by a solid line in FIG. 5A) apart from the lock lever 4e.

The bobbin holding means 8 as such a moving member is configured to perform a holding operation by an operating mechanism 20 attached to the side of the main base 2 as a fixed member. That is, first, the roller 8R of the operating piece 8Q and the roller 8T of the lock plate 8V in the bobbin holding means 8 are first described.
Is arranged so as to have a predetermined gap even when both are locked and closed, and the operating plate 21 constituting the operating mechanism 20 is received in the gap between these rollers 8R and 8T. It is configured to be.

That is, the operating plate 21 of the operating mechanism 20 described above.
Is rotatably attached via a pin 23 to the side of the fixed frame 22 attached to the main base 2 as a fixed member, and to the base side of the operating plate 21 is a linear output composed of an air cylinder, an electromagnet, etc. The output rod 24a of the drive source 24 is rotatably attached. The drive output of the linear output drive source 24 causes the operating plate 21 to move between the initial position shown in FIGS. 6 (a) and 6 (b) and the locked position shown in FIG. 6 (c). It is configured to swing between.

In particular, as shown in FIGS. 6 and 3,
The oscillating side portion of the operating plate 21 is formed in a claw-shaped portion 21a, and the tip 21b of the claw-shaped portion 21a serves as the roller 8R of the operating piece 8Q and the roller 8T of the lock plate 8V at the time of locking as described above. Are formed so as to project in the direction toward the gap portion. At this time, the roller 8T on the lock plate 8V side is provided so as to be slightly displaced closer to the operating plate 21 side than the roller 8R on the operating piece 8Q side, and the tip of the claw-shaped portion 21a of the operating plate 21 is provided. 21
A guide inclined surface is formed on b, and the tip inclined surface 21b of the claw-shaped portion 21a of the operating plate 21 is in a positional relationship capable of contacting the roller 8T of the lock plate 8V.

Further, the inner peripheral edge portion of the claw-shaped portion 21a of the operating plate 21 is formed in a curved shape that abuts and guides the roller 8R of the operating piece 8Q, as shown in FIG. 6 (b). A curved side 21c for guiding the 8Q to the initial position,
As shown in FIG. 6C, it has a curved side 21d for guiding the operating piece 8Q by pushing it to the lock position. At this time, a coil spring 24a is attached to the output rod 24a of the linear output drive source 24, and the operating plate 21 is shown in FIGS. 6A and 6B by the pressing force of the coil spring 24a. It is configured so as to be rotationally biased to the initial position side. Reference numeral 25 in FIG. 3 indicates the bobbin holding means 8.
7 shows a guide plate for guiding the roller 8R of the operating piece 8Q in the closing direction.

In the apparatus of this embodiment, the bobbin case 4 in which the bobbin thread has been consumed is taken out from the shuttle 10 while being held by the bobbin holding means 8 and is newly prepared at the other work positions B and C. The bobbin case 4 is mounted in the shuttle 10 while being gripped by the bobbin gripping means 8.

In the process of gripping operation by the bobbin gripping means 8, first, as shown in FIG. 6A, the switch SW2 of the linear output drive source 5 is turned off, whereby the forward / backward moving arm 6 is moved. The bobbin case 4 in which the bobbin holding means 8 in the locked state is prepared in the shuttle 10
Toward the right in the figure toward. At this time, the switch SW1 of the linear output drive source 24 of the operating mechanism 20 is maintained in the ON state, and the operating plate 21 is held at the initial position.

As the bobbin holding means 8 advances,
The roller 8T provided on the lock plate 8V is connected to the operating mechanism 20.
Tip inclined surface 21 of claw-shaped portion 21a of actuating plate 21 at
When contacted with b, the roller 8T of the lock plate 8V is guided along the tip inclined surface 21b of the operating plate 21 and rotated in the opening direction (upward direction in the drawing). When the bobbin holding means 8 further advances, the claw-shaped portion 21a of the operating plate 21 causes the lock plate 8V of the bobbin holding means 8 and the operating piece 8Q.
It further penetrates between and, and this causes the operating piece 8Q
The roller 8R is guided along the curved side 21c of the claw-shaped portion 21a of the actuating plate 21 of the actuating mechanism 20 and rotated in the opening direction (downward in the drawing).

The engagement step 8Q _R of the thus the locking stepped portion 8V _R of the lock plate 8V bobbin gripping means 8 working piece 8Q
When the engagement with is disengaged and the operation piece 8Q is opened as shown in FIG. 6B, the lever claw 8c is arranged at the initial position, and in this state, the lever claw 8c is closely attached to the bobbin case 4.

Next, the linear output drive source 2 of the operating mechanism 20
The switch SW1 of No. 4 is turned off, and the operating plate 21
6a is moved to the lock position as shown in FIG. At this time, the curved side 21d of the operating plate 21 is connected to the roller 8 of the operating piece 8Q.
The contact piece 8 rotates while being in contact with R, whereby the operating piece 8Q is pushed upward in the drawing, and the lever claw 8c is rotated according to the locus shown by the solid line P in FIG. 5A. as a result,
The lock lever 4e of the bobbin case 4 is 2 in FIG. 5 (a).
It is rotated according to the locus shown by the dotted line Q to be opened and held. Then a step portion 8V _R of the lock plate 8V bobbin gripping means 8 and the engagement step 8Q _R of the operating piece 8Q is fitted in閂状lock lever 4e of the bobbin case 4 is held.

In this state, the switch SW2 of the linear output drive source 5 is switched to the ON state, whereby the bobbin holding means 8 in the locked state is prepared in the shuttle 10 via the forward / backward moving arm 6 in the bobbin case 4. Holding the pot 1
The bobbin case 4 that is separated from 0 and consumes the lower thread is removed.

On the other hand, when the new bobbin case 4 prepared at the other working positions B and C is mounted in the shuttle 10 while being gripped by the bobbin gripping means 8, it is first shown in FIG. 6 (a). Switch SW2 of the linear output drive source 5
Is turned off, whereby the bobbin gripping means 8 in the locked state advances toward the shuttle 10 to the right in the figure via the forward / backward movement arm 6. At this time, the switch SW1 of the linear output drive source 24 of the actuating mechanism 20 is turned off, and the actuating plate 21a is held at the lock position shown in FIG. 6 (c).

When the bobbin case 4 held by the bobbin holding means 8 is housed in the hook 10, the operating mechanism 2
The switch SW1 of the linear output drive source 24 of 0 is switched to the ON state, whereby the operating plate 21 of the operating mechanism 20 is rotated as shown in FIG. 6 (b). When the tip inclined surface 21b of the claw-shaped portion 21a of the operating plate 21 comes into contact with the roller 8T of the lock plate 8V in the bobbin holding means 8, the roller 8T of the lock plate 8V follows the tip inclined surface 21b of the operating plate 21. Is guided and opened (upward in the figure)
Turn to. When the claw-shaped portion 21a of the actuating plate 21 is further rotated, the claw-shaped portion 21a of the actuating plate 21 further enters between the lock plate 8V of the bobbin holding means 8 and the actuating piece 8Q. The roller 8R of 8Q is guided along the curved side 21c of the claw-shaped portion 21a of the operating plate 21 and rotates in the opening direction (downward direction in the drawing).

The engagement step 8Q _R of the thus the locking stepped portion 8V _R of the lock plate 8V bobbin gripping means 8 working piece 8Q
When the engagement with is disengaged and the operating piece 8Q is opened as shown in FIG. 6B, the lever claw 8c is arranged at the initial position, whereby the grip of the bobbin case 4 is released.

Next, the switch SW of the linear output drive source 5
2 is switched to the ON state, whereby the bobbin holding means 8 in the open state is moved to the hook 10 via the forward / backward moving arm 6.
Get away from. At this time, the roller 8R of the operating piece 8Q of the bobbin holding means 8 is brought into contact with the guide plate 25 and
It is closed and locked as shown in FIG.

As described above, according to this embodiment, the bobbin case 4 is automatically pulled out or mounted without any deformation of the shuttle 10, the bobbin 9 and the bobbin case 4.

Although the invention made by the present inventor has been specifically described based on the embodiments, the invention is not limited to the above embodiments, and various modifications can be made without departing from the scope of the invention. Needless to say.

For example, as a method of locking the operating piece,
It is not limited to the latch type as in the above embodiment,
It is also possible to attach the permanent magnet to the actuating piece and to provide the side plate with the attraction piece so as to perform the locking by the magnetic attraction force. .

Further, the actuating plate is not limited to the rotating mechanism as in the above embodiment, but a direct acting mechanism can be adopted.

Switching of the switches for controlling the operation is
It can be replaced with a sequential automatic control operation by a computer.

Furthermore, each operation is constantly monitored by sensors,
If the operation is executed based on the detection signals from them, each operation can be made more reliable.

[0044]

As described above, the bobbin exchanging device for a sewing machine according to the present invention pulls out the bobbin case, in which the lower thread is consumed, by the bobbin holding means, pulls it out of the hook, and prepares it for another operation. The bobbin case is configured to be mounted in the hook while being held by the bobbin holding means.
Since the old and new bobbin cases are automatically replaced without changing the hook, bobbin case, and bobbin, the bobbin is automatically replaced while maintaining the sewing quality for many years. Therefore, the reliability of the sewing machine can be improved.

Particularly in the present invention, since the bobbin gripping means as the moving member is operated by the actuating mechanism provided on the fixed member side, and the actuating mechanism is not mounted on the moving member, power supply to the actuating mechanism is performed. It is possible to easily lay wires, pipes and the like by simple handling without using a rotary joint such as a slipping mechanism.

[Brief description of drawings]

FIG. 1 is an external perspective view showing the structure of an automatic bobbin thread feeder including a bobbin changing device according to the present invention.

FIG. 2 is an external perspective explanatory view showing a transport state in the bobbin changing device shown in FIG.

FIG. 3 is a vertical cross-sectional explanatory view showing the overall structure of the bobbin changing device in one embodiment of the present invention.

FIG. 4 is a front explanatory view showing a schematic structure of a bobbin case.

5A and 5B show a bobbin holding means in one embodiment of the present invention, FIG. 5A is a plan view, FIG. 5B is a front view, and FIG. 5C is a bottom view.

6 is an explanatory plan view for explaining the operation of the bobbin holding means shown in FIG.

[Explanation of symbols]

4 bobbin case 4e lock lever 5 linear output drive source 6 forward-reverse arm 8 bobbin gripping means 8c lever pawl 8V locking plate 8T roller 8V _R step portion 8Q actuating piece 8R roller 8Q _R engagement step 10 hook 20 operating mechanism 21 Working plate 21a Claw-shaped portion 24 Linear output drive source

Claims (5)

[Claims] 1. A bobbin wound with a lower thread is housed inside,
The bobbin case that holds and releases the bobbin by opening and closing the lock lever is provided with bobbin holding means as a moving member that reciprocates between the hook position and other working positions. The bobbin case thus prepared is pulled out from the inside of the hook by holding it by the bobbin holding means, and another bobbin case prepared at another working position is conveyed while being held by the bobbin holding means and mounted in the hook. In the bobbin exchanging device of the configured sewing machine, the bobbin gripping means as the moving member holds the lock lever of the bobbin case in the open position, and the pulling mechanism that causes the lock lever of the bobbin case to be opened from the closed position. In addition to having a lock mechanism, the lock mechanism and the raising mechanism of the bobbin gripping means are created. Sewing machine bobbin exchanging apparatus, characterized by comprising an actuating mechanism to the fixed member side to. 2. The bobbin exchanging device for a sewing machine according to claim 1, wherein the lock mechanism is a first operating body that operates in conjunction with a pulling mechanism, and a first operating body that abuts or separates from the first operating body. A bobbin exchanging device for a sewing machine, comprising: a first actuating member which locks or releases the second actuating member. 3. The bobbin exchanging device for a sewing machine according to claim 1, wherein the actuating mechanism has a cam body that comes into contact with a part of the lock mechanism of the bobbin holding means to operate while guiding the lock mechanism. The bobbin changing device of the sewing machine, which is characterized in that 4. The bobbin exchanging device for a sewing machine according to claim 1, wherein the bobbin holding means is mounted on a predetermined transfer means. 5. The bobbin exchanging device for a sewing machine according to claim 1, wherein the bobbin gripping means includes a lever claw that causes the lock lever of the bobbin case to be raised from the closed position to open, and a lock lever opened by the lever claw. A bobbin replacing device for a sewing machine, comprising: a base body that receives the bobbin case in its open position and holds the lock lever between the lever claw and the open state to hold the bobbin case.