WO2005047586A1

WO2005047586A1 - Bobbin-changing apparatus for sewing machine

Info

Publication number: WO2005047586A1
Application number: PCT/JP2003/014591
Authority: WO
Inventors: Ikuo Tajima; Taichi Fukushima; Haruhiko Kinoshita
Original assignee: Tokai Kogyo Mishin Kabushiki Kaisha; Kinoshita Precision Industrial Co., Ltd.
Priority date: 2003-11-17
Filing date: 2003-11-17
Publication date: 2005-05-26
Also published as: CN1795299A; JPWO2005047586A1; US20070056490A1; EP1722022A1

Abstract

A bobbin-changing apparatus includes a moving mechanism (20) for reciprocally moving a bobbin-holding device (10) between a sewing machine hook (6) and a bobbin stock portion (8), the bobbin holding device holding a bobbin case (B) at the tip of a chuck portion (11). A first cam plate (31) is provided near one end of the moving mechanism (20), and a second cam plate (41) is provided near the other end. In the process of the movement of the bobbin-holding device (10), the first cam plate (31) causes the chuck portion (11) to face the hook (6), and the second cam plate (41) causes the chuck portion (11) to face the bobbin stock portion (8). The cam plates (31, 41) are individually detachable from the moving mechanism (20). During the transportation of the sewing machine, one of the cam plates belongs to a main body sewing base, and the other, to extension sewing base. The bobbin-holding device (10) includes a moving body portion (13), the chuck portion (11), and a spring member (19) for urging the chuck portion so as to direct it to a predetermined neutral position in a normal state.

Description

Description Pobin exchanging device of sewing machine Technical field

The present invention relates to a pobin exchanging device for automatically exchanging a pobin case accommodating a bobbin thread bobbin mounted in a sewing machine hook. Background art

When the bobbin thread in the pobin case attached to the hook of the kettle base runs out, the empty bobbin case is automatically replaced with a new pobin case containing a pobin with sufficient bobbin thread. The exchange device is a pobin changer

— Has been known for some time. Japanese Patent Application Laid-Open No. 2000-1575774 discloses a multi-head sewing machine having a plurality of sewing heads, and a pobin changer for each sewing head (each hook base). It is shown that the drive mechanism of each pobin changer can be driven by a common drive source.

In a pobin changer, a pobin stock part (or pop pin exchange cassette) is placed near the sewing table (that is, near the front edge), and a hook located below the sewing machine head near the sewing table. The transfer mechanism is arranged so that the pobin gripping device (or the popin chuck mechanism) reciprocates between the pot of the base and the pobin stock portion. The pobin stocking section (or the popin exchange cassette) is equipped with a plurality of pobin cases and transfers pobin cases to and from the popin changer. In other words, when the bobbin thread in the shuttle has run out of thread, the pobin holding device moves to the shuttle via the transfer mechanism based on the lower thread breakage detection signal, etc., and removes the poppin case containing the empty poppin from the shuttle. Then, while holding the taken out pobin case, the pobin holding device moves to the pobin stock portion via the transfer mechanism, and passes the pobin case to an empty pobin stock position of the pobin stock portion. Then, the pobin stock section is rotated by a predetermined angle, and a new pobin case containing a pop pin with a sufficiently wound lower thread at another pobin stock position is taken out by the pop pin holding device. The pobin gripping device moves to the kettle via the transfer mechanism while holding the new pobin case taken out, and places the new pobin case in the empty kettle. Generally, the pobin exchange is performed automatically in such a procedure.

According to such a pobin changer, the worker collects an empty pobin case or stores a pobin with a sufficiently wound bobbin in the pobin stock portion near the sewing table. If you refill a new pobin case Good and easy to work. On the other hand, when such a pobin changer is not used, the operator has to go under the sewing table and directly replace the poppin case in the pot on the pot base, which is very troublesome. Therefore, in order to increase the efficiency of sewing work, large-sized industrial sewing machines such as multi-head sewing machines (including ordinary sewing machines as well as embroidery sewing machines) require such a pobin changer. It is becoming indispensable. However, there is still room for improvement in conventional pobin changers, and improvements have been desired.

For example, in the pobin changer disclosed in Japanese Patent Application Laid-Open No. 2000-1575774, a guide plate for guiding the movement of the pobin gripping device has a linear first guide groove, and both ends. A second guide groove having a sloping portion for direction change is provided in the vicinity thereof, and guided by the sloping portion of the second guide groove, at each end of the moving stroke, a chuck portion of the popin gripping device. The direction of the is changed. In short, the direction change mechanism at each end of the movement process is integrated into the movement mechanism (guide plate).

As is well known, there are various sizes of the sewing machine depending on the embroidery range and the like, and the distance from the hook base to the front edge of the sewing table, that is, the distance from the sewing machine to the popin stock portion also differs depending on the sewing machine size. For this reason, various types (sizes) of guide plates corresponding to the distance from the sewing machine pot to the pobin stock are required. In this case, in the prior art as described above, since the direction change mechanism at each end of the movement stroke is a structure that is integrally incorporated into the guide plate, the direction change mechanism at each end of the movement stroke is provided. The entire guide plate, including the machine, had to be manufactured individually in a size and structure suitable for each sewing machine type, which required a lot of time and cost for forming parts. By the way, in the case of a large-sized sewing machine, the sewing table can be divided at the front part, and the front part of the sewing table is detached during transportation. This is to reduce the size of the packaging and to make it easier to carry in and out of the building. At this time, the draft plate of the pobin changer attached to the lower surface of the sewing table extends from the front part (removed part) of the sewing table to the back (part not removed). In order to remove it from the body, it was necessary to first remove the pobin changer (at least the guide plate). Then, after the front part of the sewing table was attached to the main body after loading, the pobin changer was again attached to the lower surface of the sewing table. This work is very time-consuming, and especially the position of the guide plate is time-consuming because the position of the direction change mechanism at both ends determines the position of the pobin gripping device with respect to the sewing machine hook and the pobin stock. Met. Disclosure of the invention

The present invention has been made in view of the above point, and an object of the present invention is to provide a pobin exchanging device having a novel structure with various improvements. In addition, the present invention aims to provide a user-friendly popin changing device that can easily cope with a case where the traveling distance of the pobin gripping device is different. Also, even when applied to a split-type sewing table, it is intended to provide a popin replacement device that does not require removal and reattachment work.

According to one aspect of the present invention, there is provided a pobin exchanging device for exchanging a bobbin poppin mounted in a sewing machine hook, wherein the pobin gripping device grips a pobin case at a tip end of a chuck portion; A moving mechanism for reciprocating a gripping device between a sewing machine hook and a pobin stock unit; and the chuck of the poppin gripping device in a process of moving the poppin gripping device toward the sewing machine hook by the moving mechanism. A first direction changing mechanism for turning the direction of the part toward the sewing machine hook; and a step of moving the poppin gripping device toward the pobin stock portion by the moving mechanism. A second direction changing mechanism for turning the direction to the pobin stock portion, wherein the first and second direction changing mechanisms are respectively separated from the moving mechanism. Pobin exchange device according to feature is provided that can be.

In this way, the first and second direction change mechanisms provided on the traveling path of the moving mechanism can be separated from the moving mechanism, respectively, so that the moving mechanism can cope with any arbitrary reciprocating movement distance. Even if the structure is set to be the same, the first and second turning mechanisms having the same structure can be used. Therefore, even when the travel distance of the pobin gripping device varies due to the difference in the depth size of the sewing table, it is easy to deal with it at a relatively low cost without the need for labor to form parts. This provides an excellent effect that a versatile and easy-to-use pobin exchanging device can be provided. In addition, when the first and second direction changing mechanisms are separated from a moving mechanism located therebetween, the present invention is applied to a sewing table of a type that can be separated into a front part and a main body part. In addition, at the time of separation, only the moving mechanism can be removed, and the first and second direction change mechanisms can be left in the main body portion and the front portion of the sewing table, respectively. When assembling, the troublesome position adjustment work of the turning mechanism is not required at all (since the turning mechanism does not have to be removed from the sewing table), and so on.

According to another aspect of the present invention, there is provided a poppin exchanging device for exchanging a bobbin thread bobbin mounted in a sewing machine hook, wherein the bobbin gripping device grips a pobin case at a tip end of a chuck unit; A moving mechanism for reciprocating a gripping device between a sewing machine hook and a pobin stock unit; A first direction changing mechanism for turning the chuck portion of the pobin gripping device toward the sewing machine hook while the gripping device is moved toward the sewing machine hook; and A second direction changing mechanism for turning the chuck portion of the pobin gripping device toward the pobin stock portion in a process in which the device is moved toward the pobin stock portion; A moving body portion linearly moved by the moving mechanism, the chuck portion pivotally supported by the moving body portion, and a device for directing the direction of the chuck portion to a predetermined neutral position in normal times. A biasing spring member, wherein the first direction change mechanism directs the tip of the chuck portion toward the sewing machine shuttle against the bias of the panel member. The second turning mechanism, Pobin exchange and wherein the tip direction of the chucking portion against the bias of said panel member is intended to unsuitable towards the Pobinsutotsuku portion is provided. By configuring the pobin gripping device in this way, it is possible to achieve an excellent effect that the direction control of the chuck portion, that is, the posture control can be realized with a simple configuration.

As an example, the moving mechanism includes a guide section that guides the poppin gripping device between the sewing machine hook and the pobin stock section, and a drive section that reciprocates the pobin gripping device along the guide section. You can go out. This simplifies the configuration of the moving mechanism. In addition, each of the first and second direction change mechanisms has an inclined cam surface, and the pobin gripping device includes a cam follower in association with the chuck portion. When the device is moved, the cam follower moves along the cam surface, so that the chuck portion is rotated to change the direction of the tip. This simplifies the configuration of the turning mechanism.

According to still another aspect of the present invention, there is provided a pobin exchanging device for exchanging a bobbin thread bobbin mounted in a sewing machine hook, comprising a pobin gripping device for gripping a pobin case at a tip end of a chuck portion. A moving mechanism for reciprocating the pobin gripping device between a sewing machine hook and a pobin stock portion, wherein the chuck portion of the poppin gripping device includes an arm gripping claw for pulling out a pobin case arm; A drive means for rotating the gripping claw to pull out the pobince arm; and an arm engaging projection for engaging and holding the pobin case arm pulled out by the arm gripping claw. A pobin exchanging device is provided. This makes it possible to simplify the holding structure of the pobin case in the pobin holding device and to surely maintain the holding state.

According to still another aspect of the present invention, there is provided a pobin exchanging device for exchanging a bobbin thread bobbin mounted in a sewing machine hook, wherein a chuck section holds a pobin case. A gripper for holding the bobbin case with the empty chuck portion, and a release operation for selectively releasing the poppin case from the chuck portion holding the pobin, and the pobin gripper; A moving mechanism for reciprocating the apparatus between the sewing machine and the popin stock section together with the actuating machine; and a moving mechanism for moving the popin holding device toward the sewing machine by the moving mechanism. A first cam mechanism for pointing the chuck portion of the gripping device toward the sewing machine hook; and a poppin gripper in a process of moving the pobin gripping device toward the pobinstock portion by the moving mechanism. A second cam mechanism for directing the chuck portion of the holding device toward the pobin stock portion; a first cam mechanism and a second cam device. And a means for positioning the chuck portion of the pobin gripping device in a neutral posture during the intermediate movement process between the bobbin stocker and the bobbin stocker. A pobin exchanging device is provided in which a pobin case accommodating a bobbin thread bobbin is exchanged by taking a pobin case into the chuck portion or releasing the poppin case from the chuck portion by an actuation. Brief Description of Drawings

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the figure,

FIG. 1 is an overall schematic view showing an example of a multi-head embroidery sewing machine to which a pobin exchanging device according to the present invention is applied,

FIG. 2 is a side view showing one embodiment of a popin exchange device according to the present invention,

FIG. 3 is a side view of a bobbin changing device similar to that shown in FIG. 2, in which the guide length is shortened and other elements are enlarged for easy viewing, and FIG. FIGS. 2 and 3 are plan views of the poppin chuck unit in different postures.

FIG. 5 is a view taken in the direction of arrow A in FIG.

FIG. 6 is a diagram showing another posture of the pobin chuck unit viewed from the same direction as FIG. 5,

Figs. 7 (a) to (c) are side views showing the state of the torsion panel in the pobin chuck unit.

Figs. 8 (a) to (c) are side views that extract and show the attitude of the chuck part in the pobin chuck unit.

Fig. 9 is a side view showing a specific configuration example of the first and second direction change mechanisms in Figs. 2 and 3, and an explanatory diagram schematically showing a locus of movement of the opening in a series of direction change operations. ,

FIG. 10 schematically shows the trajectory of the movement of the chuck portion in a series of turning operations. Explanatory diagram,

Fig. 11 is a plan view of the chuck portion of the popin chuck unit as viewed from above, Fig. 12 is a plan view showing a state in which the pobin case is gripped by the chuck portion, and Fig. 13 is a first view provided on the sewing machine side. It is a side view which shows the example of a change of the mounting structure of a direction change mechanism. BEST MODE FOR CARRYING OUT THE INVENTION

[Overall appearance of multi-head embroidery machine]

FIG. 1 is a schematic overall view showing an example of a multi-head embroidery sewing machine 1 to which a pobin exchanging device according to the present invention is applied.

As is well known, the multi-head embroidery sewing machine 1 includes a plurality of sewing heads 2 and a hook base 5 (FIG. 2) which is provided below the main body sewing table 3 in correspondence with each of the sewing heads 2. At least a sewing machine 6 (Fig. 2) provided on each machine base is provided. At the front edge of the main body sewing table 3, an extended sewing table 4 is detachably mounted. An embroidery frame drive mechanism is also provided on the sewing table, but is not shown for the sake of simplicity. A popin exchanging device 7 according to one embodiment of the present invention is provided for each sewing machine 6 corresponding to each sewing head 2. Since the pobin exchanging device 7 is disposed below the bases 3 and 4, it cannot be seen in FIG. Pobin stock sections 8 corresponding to the respective pobin exchanging devices 7 are arranged below the extension sewing table 4 on the front side. Throughout the attached drawings, parts necessary for explanation will be appropriately shown and unnecessary parts will be omitted. Therefore, parts and the like not shown actually exist in the product, and some parts are shown in one figure but not shown in another figure.

[Overall configuration of Pobin exchange device 7]

FIG. 2 is a side view showing an embodiment of the pobin exchanging device 7 according to the present invention, and shows a state where the pobin exchanging device 7 is attached to the lower side of the sewing tables 3 and 4. Only one set of pobin exchanging device 7 corresponding to one set of sewing head 2 and sewing machine shuttle 6 is shown, but the other pobin exchanging devices have the same configuration. Fig. 3 is a side view of a pobin changing device 7 similar to that shown in Fig. 2, in order to enhance visibility, only the popin changing device 7 is extracted and each element is shown in an enlarged scale. However, the lengths of the guide rods 21 and 22 and the endless belt 25 are shortened for convenience. Please refer to Fig. 3 for parts that are difficult to see in Fig. 2.

The popin changing device 7 includes a pobin chuck unit 10 (pobin gripping device) having a chuck 11 for gripping the popin case B at a tip thereof, and the pobin chuck unit 10 includes a sewing machine 6 and a pobin stock 8. A moving mechanism 20 for reciprocating between the unit and the povin chuck unit by the moving mechanism 20 A first direction change mechanism 30 for turning the chuck 11 of the pobin chuck unit 10 toward the sewing machine 6 while 10 is moved / conveyed toward the sewing machine 6; In the process of moving the pobin chuck unit 10 toward the pobin stock unit 8 by the moving mechanism 20, the chuck unit 11 of the pobin chuck unit 10 is oriented toward the pobin stock unit 8. And a second direction changing mechanism 40 to be turned on. As described later, the first and second direction change mechanisms 30 and 40 are separable from the moving mechanism 20 respectively. [Explanation of moving mechanism 20]

The moving mechanism 20 includes two guide rods 21 1 and 22 (parallel guides) extending in parallel to guide the pobin chuck unit 10 to move linearly between the sewing machine hook 6 and the pobin stock unit 8. And a drive mechanism for reciprocating the pobin chuck 10 along the guide rods 21 and 22. The guide rods 2 1 and 2 2 are formed to have an appropriate length according to the separation distance between the sewing machine hook 6 and the poppin stock section 8 in the sewing machine to be applied. And are unitized as a guide section consisting of two parallel guide rods 21 and 22. In the example shown in the figure, the drive mechanism of the moving mechanism 20 is constituted by an endless (ring-shaped) toothed belt 25 provided over the length range of the belt guide rods 21 and 22. The endless toothed belt 25 is stretched between a driving belt gear 26 and a driven belt gear 27 provided at both ends of the guide rods 21 and 22, respectively. The pobin chuck unit 10 is fixed to a predetermined position of 25, and the pobin chuck unit 10 is moved with the movement of the belt 25. The pobin chuck unit 10 is fixed to a predetermined portion of the belt 25 by a screw 12 so as to be detachable.

The drive belt gear 26 is supported at a predetermined position on the first cam plate 31 constituting the first direction changing mechanism 30 and is coaxially connected with the drive gear 28. In addition, the driven belt gear 27 is supported at a predetermined position on the second cam plate 41 constituting the second direction changing mechanism 40, and is freely driven and rotated. The drive gear 28 meshes with the drive shaft gear 29. The interlocking shaft gear 29 is attached to a common interlocking shaft 50, and the common interlocking shaft 50 is rotationally driven by a common drive motor (not shown) for poppin replacement. Further, the common interlocking shaft 50 extends laterally below the main body sewing table 3 of the multi-head embroidery sewing machine 1, and the interlocking shaft gear of each pobin exchanging device 7 corresponding to each sewing head 2. 2 9 are fixed respectively. Accordingly, the common interlocking shaft 50 rotates in response to the rotation of the common drive motor for popin exchange, and accordingly, the interlocking shaft gear 29 of each pobin exchanging device 7 rotates together. Accordingly, in each of the pobin exchanging devices 7, the driving gear 28 rotates, and the driving belt gear 26 rotates to drive the endless toothed belt 25. As a result, the pobin chuck unit 10 fixed to a predetermined portion of the belt 25 is linearly moved. Let

[Explanation of popin chuck unit 10]

FIG. 4 is a plan view of the pobin chuck unit 10. Note that the inclination of the chuck portion 11 of the pobin chuck unit 10 is downward in FIG. 3, whereas it is drawn horizontally rightward in FIG. FIG. 5 is a view taken in the direction of the arrow A in FIG. 4, and some of the elements are shown in a cross-section. FIG. 6 shows the popin chuck unit 10 viewed from the same direction as FIG. 5, but the inclination of the chuck portion 11 is horizontal in FIG. 5, whereas in FIG. It is drawn downward. In the other figures, hatchings indicating cross sections are similarly omitted to avoid complication, and are drawn as necessary.

The pobin chuck unit 10 is pivotally supported by a movable body 13 fitted to the guide rods 21 and 22 so as to be slidable, and by the movable body 13 via a tilt shaft 14. The zipper part 1 1 is included. As shown in FIG. 3, the toothed belt 25 is sandwiched between the lower surface of the moving pod 13 and the belt fastener 15, and tightened with the screw 12, whereby the pobin chuck unit 10 is tightened. Is fixed to the toothed belt 25. The chuck portion 11 includes a chuck tilting body 11a serving as a main body and a chuck mechanism provided at a tip end thereof. The pobin case B is gripped by this chuck mechanism, and the specific structure will be described later. The chuck tilting body 11 a is fixed to one end of the tilting shaft 14, and the tilting shaft 14 passes through the moving body 13 and is pivotally supported by the moving body 13 so as to be tiltable, so that the chuck tilting body 11 a A tilt shaft operating lever 16 is fixed to the end of the tilt shaft 14 on the opposite side. A roller 17 as a cam follower is rotatably supported at the tip of the tilt shaft operating lever 16. As will be described later, when the roller 17 rolls along the cam surfaces of the cam plates 31 and 41 of the first and second direction change mechanisms 30 and 40, the tilting shaft operates accordingly. The lever 16 tilts around the tilt shaft 14, and the tilt shaft 14 rotates according to the tilt, and the chuck tilt body 11 a, that is, the chuck portion 11 tilts according to this rotation. Tilt about axis 14

A force roller 18 is arranged around the tilt axis 14 between the movable body 13 and the tilt axis operating lever 16. The width of the collar 18 forms a gap necessary to allow passage of the cam plates 31 and 41 described later. A torsion spring (or helical panel) 19 is fitted between the movable body 13 and the chuck tilting body 11a around the tilting shaft 14. A panel stop pin 19 1 is embedded in a predetermined position of the moving body 13. A tilt return pin 192 is embedded at an end of the chuck tilting body 11a opposite to the chuck mechanism with the shaft 14 interposed therebetween. 3 and 6 show the torsion spring 19 in a neutral state. One end 19a of the torsion panel 19 is urged counterclockwise in FIG. 3, and the other end 19b of the torsion spring 19 is urged clockwise in FIG. The pins 19 1 and 19 2 are arranged so as to be able to abut the respective ends 19 a and 19 b of the torsion panel 19. Therefore, in the neutral state shown in FIG. 3 or FIG. 6, each pin 191, 192 is sandwiched between the ends 19a, 19b of the torsion panel 19, and the chuck The end of the tilting body 11a with the tilt return pin 192 is located at the top, and the chuck mechanism at the opposite end is located at the bottom, i.e., the tip of the chuck 11 faces downward Is set. Roller 17 is at the top. FIG. 7 (a) extracts and shows the state of the torsion panel 19 in the neutral state. FIG. 8A shows the extracted state of the chuck portion 11 in the neutral state.

As will be described later, when the roller 17 tilts clockwise in FIG. 3 when the tip of the chuck 11 is turned to face the popin stock 8, the chuck tilt body 11a and The tilt return pin 192 is also tilted clockwise, and one end 19a of the panel 19 is turned clockwise. Thereby, the tip of the chuck portion 11 is directed horizontally leftward in FIG. 2 or FIG. 3, that is, faces the pobin stock portion 8. FIG. 7 (b) shows the state of the torsion panel 19 in this state, and FIG. 8 (b) shows the state of the chuck portion 11 in this state. When the force exerted on the roller 17 is released, the clockwise rotational biasing force on the one end 19a of the spring 19 is also released, and the panel 19 returns to the neutral state by the restoring force. That is, the one end 19a of the panel 19 moves counterclockwise and returns, and the tilt return pin 192 moves counterclockwise to return to the neutral state. On the other hand, as will be described later, when the roller 17 is tilted counterclockwise in FIG. 3 when the tip of the chuck portion 11 is turned to face the hook 6, the chuck tilt body 11a The tilt return pin 192 also tilts counterclockwise, and the other end 19b of the panel 19 rotates counterclockwise. As a result, the tip of the chuck portion 11 is oriented in the horizontal right direction in FIG. 2 or FIG. FIG. 7 (c) extracts the state of the torsion panel 19 in this state, and FIG. 8 (c) extracts and shows the state of the chuck portion 11 in this state. When the force applied to the roller 17 is released, the counterclockwise rotational biasing force on the other end 19 b of the spring 19 is also released, and the panel returns to the neutral state by the restoring force. That is, the other end 19 b of the panel 19 moves clockwise and returns, and the tilt return pin 192 moves clockwise to return to the neutral state.

[Explanation of direction change mechanism 30 and 40]

Returning to FIG. 2 or FIG. 3, and with reference to FIG. 9, a specific configuration example of the direction change mechanisms 30 and 40 will be described. Fig. 9 shows an example of the specific configuration of the direction change mechanisms 30 and 40 in a side view, and shows a series of direction change operations for reference. FIG. 7 is a diagram schematically illustrating the trajectory of the movement of the roller 17 in FIG.

The first direction change mechanism 30 is disposed at an end near the shuttle 6 in the transporting process of the pobin chuck unit 10 by the moving mechanism 20 (guide rods 21 and 22). Specifically, the first cam plate 31 has a predetermined shape as shown in FIG. The first cam plate 31 has a cam surface 31 a that is inclined so as to descend toward the rear end (toward the shuttle 6) in a predetermined tilting section in the transfer process. It has a horizontal groove 31b corresponding to a straight section of a predetermined length after completion, and further has a bearing 31c that pivotally supports the rotation shaft of the drive belt gear 26 described above. The horizontal groove 31b has a size suitable for fitting the roller 17 of the popin chuck unit 10 and guiding it in the horizontal direction. Further, the horizontal groove 3 lb is along the horizontal movement line of the tilting axis 14 of the pobinch knuckle 10, and allows the shaft 14 to enter. The first cam plate 31 (first direction changing mechanism 30) is accurately positioned at a predetermined position on the lower surface of the main body sewing table 3, and is attached with screws or the like. Then, the holding member 24 at one end of the guide rods 21 and 22 is easily removed and attached to the first cam plate 31 thus accurately positioned via screws.

The second direction changing mechanism 40 is disposed at an end near the pobin stock section 8 in the transporting process of the pobin chuck unit 10 by the moving mechanism 20 (guide rods 21 and 22). Specifically, it is composed of a second cam plate 41 having a predetermined shape as shown in FIG. The second cam plate 41 has substantially the same structure as the first cam plate 31 described above, and more specifically, has a symmetric structure. That is, the second cam plate 41 has a cam surface 41 a that is inclined so as to descend toward the front end (toward the pobin stock portion 8) in a predetermined tilting section in the transport stroke. It has a horizontal groove 41b corresponding to a linear section of a predetermined length after the end of 41a, and further has a bearing portion 41c that pivotally supports the rotation shaft of the driven belt gear 27 described above. The second cam plate 41 (the second direction changing mechanism 40) is accurately positioned in a predetermined arrangement on the lower surface of the extension sewing table 4, and is attached with screws or the like. Then, the holding bracket 23 at the other end of each of the guide rods 21 and 22 is easily removed and attached to the second cam plate 41 accurately positioned in this manner via a screw or the like. . Therefore, once the cam plates 31 and 41 have been accurately positioned and fixed to the lower surface of each of the sewing tables 3 and 4 once, the length of the guide rods 21 and 22 and the holding brackets 23 and 24 become longer. Even if the guide nut of the length is removed from the cam plates 31 and 41 as appropriate, it does not affect the mounting accuracy of the cam plates 31 and 41, and the accuracy of the important direction change mechanism is not affected. A good positioning state can be maintained. In other words, even if the long guide duct consisting of the guide rods 21 and 22 and the holding brackets 23 and 24 is removed arbitrarily, the positioning accuracy of the direction change mechanisms 30 and 40 is not improved. The guide without any realization of ensuring reproducibility The unit can be easily reattached to each of the cam plates 31 and 41. [Transport travel and direction change operation of Pobinchack Unit 10]

Next, the direction changing operation of the bopin chuck unit 10 by the direction changing mechanisms 30 and 40 will be described with reference to FIGS. 9 and 10 and others. FIG. 10 is a diagram schematically illustrating the trajectory of the movement of the chuck portion 11 (chuck tilting body 11 a) in a series of direction changing operations.

If the rollers 17 of the pobin chuck unit 10 do not reach the cam plates 31 and 41 at both ends of the transport stroke, the chuck unit 11 will be moved to the tip by the action of the torsion panel 19 as described above. As shown in Fig. 2, Fig. 3, Fig. 8 (a), etc., maintain the downward neutral position of the check mechanism. This section is shown as “neutral section” in FIG. As described above, in this neutral state, the roller 17 is at the highest position (FIGS. 7 (a) and 8 (a)). When the pobin chuck unit 10 moves in the direction of the shuttle 6 (to the right in FIGS. 2, 3, and 9), the roller 17 eventually becomes the top of the cam surface 31 a of the first cam plate 31. Abut. The position of the roller 17 at this time is indicated by reference numeral 17a in FIG. When the roller further moves, the roller 17 tilts counterclockwise downward about the axis 14 following the cam surface 3 1a falling to the right, with the result that the lever 16 and the axis 14 move in the same direction. Z tilt, and the chuck tilting body 11a tilts counterclockwise around the axis 14 and gradually turns upward counterclockwise so that the chuck mechanism at the tip of the body tilts toward the shuttle 6. To rotate. When the roller 17 reaches the lowermost part of the cam surface 31a, thereafter, it is fitted into the horizontal groove 31b and moves horizontally. When the roller 17 is fitted into the horizontal groove 31b in this manner, the roller 17 has a relationship with the moving body 13 as shown in FIG. 7 (c), and the tip of the chuck tilting body 11a is formed. The chuck mechanism of (1) is in the horizontal right direction (the direction facing the shuttle 6) as shown in Fig. 8 (c). The section where the roller 17 moves horizontally by fitting into the horizontal groove 31b is shown as a "straight section" in FIG. In this “straight section”, the chuck mechanism at the front end of the chuck tilting body 11a moves further to the right in the horizontal direction, facing the hook 6, and finally reaches the hook 6, whereupon the pop pin case B (In this case, usually, the lower bobbin thread is empty), or place a pobin case B (in this case, usually the lower bobbin having sufficient lower thread) in the shuttle 6. U. At the end of this “straight line section”, the tilt axis 14 reaches the position indicated by reference numeral 14a in FIG.

Next, the motor is reversed, and the pop pin chuck unit 10 is caused to run in the opposite direction (left direction in FIG. 9) via the belt 25. In the process, if the opening 17 comes out of the horizontal groove 3 1b, the pin 19 2 is urged clockwise by the action of the torsion panel 19, and the roller 17 Then, it moves clockwise, and rises following the cam surface 31a rising upward. Roller 17 is the top of cam surface 3 1a When it is removed from the part, the chuck part 11 (chuck tilting body 11a) is in the neutral state (FIGS. 7 (a) and 8 (a)) as described above. The pobin chuck unit 10 continues to move in the direction of the pobin stock section 8 (to the left in FIGS. 2, 3, and 9), and eventually the roller 17 becomes the cam surface 4 of the second cam plate 4 1. Touches the top of la. The position of the roller 17 at this time is indicated by reference numeral 17b in FIG. When the roller 17 moves further, the roller 17 tilts clockwise downward about the axis 14 following the cam surface 41a that is descending to the left, and accordingly, the lever 16 and the axis 14 move in the same direction. The chuck tilting body 11a tilts clockwise around the axis 14 and gradually moves upward so that the chuck mechanism at the tip of the tilting body 11a points toward the pobin stock portion 8. Rotate clockwise. When the roller 17 reaches the lowermost portion of the cam surface 41a, the roller 17 thereafter moves horizontally by fitting into the horizontal groove 41b. When the roller 17 is fitted in the horizontal groove 41b in this manner, the roller 17 has a relationship with the moving body 13 as shown in FIG. 7 (b), and the tip of the chuck tilting body 11a is formed. As shown in Fig. 8 (b), the chuck mechanism is in the horizontal left direction (the direction facing the pobin stock unit 8). The section in which the roller 17 moves horizontally by fitting into the horizontal groove 41b is shown as a "straight section" in FIG. In this "straight section", the chuck mechanism at the tip of the chuck tilting body 11a further moves leftward horizontally facing the pobin stock section 8, and finally reaches the pobin stock section 8, where the pobin stock is located. Pick up pobin case B (in this case, usually the lower bobbin thread bobbin has sufficient bobbin thread) from section 8, or place pobin case B (in this case, usually the lower bobbin pobin is empty) in the pobin stock section 8. There is an action to put. At the end of this “straight line section”, the tilt axis 14 reaches the position indicated by the reference numeral 14b in FIG.

Next, the motor is rotated forward, and the pobin chuck unit 10 is caused to travel rightward in FIG. 9 via the belt 25. In the process, when the roller 17 comes off the horizontal groove 4 1b, as described above, the pin 19 2 is urged in the counterclockwise direction by the action of the torsion panel 19, and the roller 17 becomes It moves upward in the counterclockwise direction and rises in accordance with the upward rising force surface 4 1 a. When the roller 17 comes off the uppermost part of the cam surface 41a, the chuck part 11 (chuck tilting body 11a) enters the neutral state (Fig. 7 (a), Fig. 8 (a)) as described above. .

In this way, the direction of the chuck portion 11 of the popin chuck unit 10 can be automatically changed within a range of 180 degrees according to the travel distance. [Description of chuck mechanism]

Next, an embodiment of the chuck mechanism in the chuck section 11 will be described. Fig. 11 is a plan view of the chuck portion 11 of the popin chuck unit 10 viewed from above, and in order to pick up the bopin case B from the hook 6, the popin case B is placed in the hook 6 or Immediately after This shows a state in which it is in contact with the shuttle 6. FIG. 12 is a plan view showing a state where the pop pin case B is gripped by the chuck portion 11. It should be noted that in FIGS. 11 and 12, the pobin case B and the inside of the pobin case B are generally shown in cross-section, but are not particularly hatched.

The tip of the chuck portion 11 is formed as a 1 lb attitude holding bracket having an edge formed of a concave curve that follows the convex curve of the surface of the pobin case B, and a pobin arm gripping claw 11c is pivotally supported at a predetermined position. I have. The gripper jaw opening / closing lever 11d is pivotally supported coaxially with the gripper 11c and at a certain angle to it, and the point of action of the gripper jaw opening / closing lever 11d is set to the jaw opening / closing cylinder. It is connected to the mouth of 11 e. The pawl opening / closing cylinder 11e is composed of, for example, an air cylinder, but may be another actuator. As shown in Fig. 11, when the rod of the cylinder 11e is contracted, the gripper 11c is in an open state, and the bin B is not gripped.

In FIG. 11, a case where the pobin case B is picked up from the shuttle 6 by the chuck portion 11 will be described. As shown in Fig. 11, when the chuck 11 and the shuttle 6 are in a predetermined positional relationship for transferring the poppin case B, the tip of the open gripper 1 1c will close the pobin case B. The pobin case arm B1 fits easily in the claw insertion gap near the tip of the arm B1. In this state, when the rod of cylinder 11e is extended, the gripping pawl opening / closing lever 11d and the linking structure of gripping pawl 11c cause the gripping pawl 11c to rotate counterclockwise around the pivot point. And close the claw 11c. At this time, the tip of the claw 11c in the claw insertion gap hooks the pobin case arm B1 from the inside thereof, and opens the pobin case arm B1 outward. An arm receiving portion 11 g and an arm window protrusion 11 f are provided at predetermined positions of the posture holding bracket 1 1 b, and the pobin case arm B 1 opened by the gripping claw 1 1 c is received by the arm receiving portion. The arm window projection 11 f is strongly engaged with the hole edge of the opening window B2 formed in the pobin case arm B1. Thus, as shown in FIG. 12, the pobin case arm B 1 is grasped between the grasping claw 11 c and the arm receiving portion 11 g, and the arm window protrusion 11 f is attached to the pobin case arm B 1. The pobin case B is firmly engaged with the edge of the opening window B2, and the surface of the pobin case B is firmly supported by the position holding bracket 11b. As a result, the pobin case B is firmly held by the chuck portion 11 as a whole. Can be grasped. Note that. Although not shown, a winding panel is provided at a pivot point of the gripper 11c, and the gripper 11c is always urged to open as shown in FIG. Therefore, when the extension driving force of the cylinder 11e is released, the gripper 11c returns to the open state as shown in FIG. 11 and the held pobin case B is released. Thus, gripping and release of the pobin case B by the chuck portion 11 are controlled by controlling the cylinder 11e. [Explanation of Pobin Stock Section 8]

The pobin stock section 8 may use a conventionally known configuration. As shown in FIG. 2 or FIG. 10, one pobin stock portion 8 has four pobin case stock portions extending radially at 90 ° intervals, and is provided with an index drive shaft 8 1. By the rotation, a stock portion to be located at the predetermined access position 8a accessed by the pobin chuck unit 10 is determined. As shown in FIG. 1, the indexing drive shaft 81 extends in the lateral direction of the sewing machine, and performs common indexing control of each pobin stock unit 8 corresponding to each pobin exchanging device 7. For example, when receiving an empty pobin case B from the pobin chuck unit 10, the empty stock part is located at the predetermined insertion / removal position 8a. Then, a pobin case B containing poppins wound with sufficient bobbin thread is set in at least one predetermined stock portion. Then, the poppin chuck unit 10 receives the empty poppin case B extracted from the shuttle 6 at the empty stock position at the predetermined insertion / extraction position 8a. After that, rotate the indexing drive shaft 8 1 to rotate the pobin stock section 8, and place the stock area where the popin case B containing the bobbin wound with sufficient bobbin thread is placed at the predetermined insertion / extraction position 8 a. Let it. Then, the pobin case B located at the predetermined loading / unloading position 8 a is picked up by the pobin chuck unit 10, brought to the shuttle 6, and stored in the shuttle 6. In this way, the bobbin thread popin is automatically replaced. In general, refilling of a new pobin case B containing a bobbin with sufficient bobbin thread and collection of an empty pobin case B are manually performed for each stock portion of the pobin stock section '8. Therefore, the fact that the pobin stock section 8 is located at the front of the sewing table 4 means that manual work is slow. However, the present invention is not limited to this, and the replenishment and collection of the pobin case B for each stock site of the pobin stock unit 8 may be appropriately automated.

[Explanation of disassembly and assembly performance]

As described above, the first cam plate 31 serving as the first direction change mechanism 30 is accurately positioned and attached to the lower surface of the main body sewing table 3, and the second direction change mechanism 40. The second cam plate 41 is positioned and attached to the lower surface of the extended sewing table 4 accurately. Further, as shown in FIG. 2, each of the pobin stock portions 8 is also accurately positioned and attached to the lower surface of the extended sewing table 4. In this case, as shown in FIG. 2, for example, the common mounting bracket 9 in which the port holes and the like for mounting the cam plate 41 and the pobin stock portion 8 are accurately opened is accurately attached to the lower surface of the extension sewing table 4. It is preferable that the cam plate 41 and the pobin stock 8 be mounted on the common mounting bracket 9 by positioning.

When manufacturing the multi-head embroidery sewing machine according to the present embodiment, at least the sewing machine body and the extended sewing table 4 are manufactured in a separated state, and the separated sewing machines are individually packed. Transport to the destination. It is a large industrial machine and its delivery destination is overseas. In this way, the large sewing table is separated into the main sewing table 3 and the extended sewing table 4 on the sewing machine main body, packed and transported, and at the final destination, the extended sewing table 4 is replaced with the main sewing table on the sewing machine side. By connecting to 3 and assembling the multi-head embroidery sewing machine as the final product, the transportation cost can be greatly reduced by reducing the size of the packing and efficient storage in the shipping container, etc. .

The advantage itself of such a separate configuration assembly has been known in the past, but in the conventional apparatus, the poppin changing device provided below the sewing table was integrated as a whole. When the sewing machine and the extension sewing table are separated, the pobin exchanging device is also completely removed and transported. Finally, after the extension sewing table is connected to the main sewing machine on the sewing machine, the pobin exchanging device is accurately positioned. I had to attach it, and it was very troublesome.

On the other hand, according to the embodiment of the present invention, at the stage of being manufactured at the factory, the cam plate 41 and the pobin stock portion 8 are already accurately positioned and attached to the extended sewing table 4, and The cam plate 31 is accurately positioned on the sewing table 3 and is already installed. Further, an indexing drive shaft 81 that can belong to the side of the extended sewing table 4 may be mounted in advance, and the driven belt gear 27 may be mounted on the cam plate 41 in advance. Similarly, the drive belt gear 26 and the drive gear 28, which can belong to the side of the main body sewing table 3, are mounted on the cam plate 31 in advance, and the interlocking gear 29, the common interlocking shaft 50, etc. are also mounted on the main body sewing table. 3 may be attached in advance. Then, the two sewing tables are packed in a separated state, and at the final destination, the extension sewing table 4 is connected to the main sewing table 3 of the sewing machine main body, and the multi-head embroidery machine which is the final product is connected. Assemble Shin. At that time, when assembling the popin exchanging device 7, the two guide rods 21, 22 are simply connected by the holding brackets 23, 24, and the endless toothed belt 25 with the belt 25 is provided. One unit consisting of the chuck unit 10 attached to the guide rods 21 and 22 is separately packed and transported (that is, three units are transported as a whole). It is only necessary to attach the belts 25 to the gears 26, 27 by simply attaching the belts 25 to the gear plates 31, 41 simply by screwing or the like to the lower force plates 31, 41. Therefore, assembling of the pobin exchanging device 7 becomes extremely easy, and a series of costs associated with separate packing, transportation, and assembly of the entire sewing machine can be greatly reduced.

The present invention is not limited to the advantages associated with the separate packing, transport, and assembly of the entire sewing machine, and the first and second structures having the same structure can be used even if the moving mechanism is set to a structure corresponding to any arbitrary reciprocating movement distance. The advantage of using the second direction change mechanism (cam plates 31, 41) is also provided. In other words, even if the travel distance of the pobin gripping device varies due to the difference in the depth size of the sewing table, only by changing the length of the guide rods 21 and 22 03 014591

16 It is a relatively simple and easy-to-use, low-cost, easy-to-use pobin exchanging device without the hassle of forming parts (the cam plates 31 and 41 can be used in common). Can be provided.

[Explanation of Modification Example]

In the above embodiment, the first direction change mechanism 30 located on the hook base 5 side is attached to the main body sewing stand 3. However, the present invention is not limited to this, and appropriate positions on the sewing machine main body side (for example, It may be mounted on the base 5). FIG. 13 shows an example in which the first turning mechanism 30 is attached to the hook base 5. In FIG. 13, an approximately L-shaped bracket 301 is fixed to the hook base 5, and the lower end of the bracket 301 is fixed to the sewing machine frame F. The first direction changing mechanism 30 on the side of the hook base 5 is fixed to the bracket 301. The bracket 301 carries a common interlocking shaft 50. With the structure in which the first direction change mechanism 30 is attached to the pot base 5 in this manner, the positioning accuracy of the pobin chuck 10 on the pot base 5 is further improved.

Further, in the above embodiment, the claw 11c of the chuck portion 11 of the pobin chuck unit 10 is driven by the air cylinder. However, the invention is not limited to this, and other appropriate means may be used. For example, by arranging a wire and performing a push / pull operation on the wire, the claw 11 c of the chuck 11 may be opened and closed.

In addition, in the transmission mechanism that moves the pobin chuck unit 10 by rotating the common interlocking shaft 50, the slip transmission enables the common interlocking shaft 50 to rotate even when the popin chuck unit 10 is stopped. A mechanism may be provided. For this purpose, for example, a disk (not shown) is fixed to each end of the shaft of the drive gear 28 and the shaft of the drive belt gear 26, and these two disks are pressed against each other by a spring member. Thus, the rotation of the drive gear 28 is transmitted to the drive belt gear 26. As a result, even if the pobin chuck unit 10 reaches the movement limit and the drive belt gear 26 cannot rotate, the slippage occurs between the two discs and the drive gear 28, The axis 50 can be rotated. Therefore, for example, a notch through which an operator can enter is provided in a part of the front edge portion of the sewing table 4, and the pobin replacing unit 7 is provided in a portion having the notch, and is provided in a portion having no notch. If a configuration is adopted in which the travel distance of the pobin chuck unit 10 is different from that of the pobin exchange unit 7, the common interlocking shaft 50 is driven to rotate in accordance with the longer travel distance. be able to. That is, even if the common interlocking shaft 50 is continuously driven to rotate after the pobin chuck unit 10 stops, the rotation is not transmitted by the slip transmission mechanism, and the movement is not performed. No further linear movement of the shorter popin chuck unit 10 is performed. In addition, the above-mentioned slip transmission mechanism is installed. In this way, even if the movement of the pobin chuck unit 10 of each pobin exchange device 7 is shifted, the common interlocking is performed so that it moves more than the actual movement amount of the pobin chuck unit. By rotating the shaft 50, all the pobinchack units 10 can be moved to the movement limit position.

In the above embodiment, the common interlocking shaft 50 is driven to rotate by a motor. However, the present invention is not limited to this, and any other driving source may be used. For example, a mechanism that converts a linear driving force from a linear drive source (for example, an air cylinder) into a rotational motion of the common interlocking shaft 50 may be used.

The pobin exchanging device according to the present invention is not limited to an embroidery sewing machine, and can be applied to any other types of sewing machines. Further, the present invention is not limited to a multi-head sewing machine, but may be applied to a single-head sewing machine and any other types of sewing machines.

Claims

The scope of the claims

1. A bobbin replacement device for replacing the bobbin poppin mounted in the sewing machine hook.

A pobin gripping device for gripping a popin case at the tip of the hack,

A moving mechanism for reciprocating the pobin gripping device between the sewing machine hook and the popin stock portion;

A first direction change mechanism for causing the chuck portion of the pobin gripping device to face the sewing machine in the process of moving the poppin gripping device toward the sewing machine by the moving mechanism;

A second direction change mechanism for turning the chuck portion of the popin gripping device toward the pobin stock portion in a process of moving the pobin gripping device toward the pobin stock portion by the moving mechanism;

The first and second direction changing mechanisms are each separable from the moving mechanism, and the popin changing apparatus is characterized in that:

2. The moving mechanism includes: a guide section for guiding the pobin holding device between the sewing machine hook and the pobin stock section; and a driving section for moving the pobin holding device forward and backward along the guide section. The popin changing device according to claim 1, wherein the device comprises:

3. Each of the first and second direction change mechanisms has an inclined cam surface, and the pobin gripping device includes a cam follower associated with the chuck portion, and the popin gripping device. 2. The pobin exchanging device according to claim 1, wherein the cam follower moves along the cam surface when moving, so that the chuck portion is rotated to change the direction of its tip.

4. A bobbin replacement device for replacing the bobbin thread bobbin installed in the sewing machine hook.

A poppin holding device for holding a pobin case at the tip of the chuck portion,

A moving mechanism for reciprocating the pobin gripping device between the sewing machine hook and the pobin stock unit;

A first direction changing mechanism for causing the chuck portion of the pobin gripping device to face the sewing machine in the process of moving the pobin gripping device toward the sewing machine by the moving mechanism;

A second direction change mechanism for turning the chuck portion of the pobin gripping device toward the pobin stock portion in the process of moving the poppin gripping device toward the pobin stock portion by the moving mechanism. , The pobin gripping device includes: a moving body portion that is linearly moved by the moving mechanism; a chuck portion pivotally supported by the moving body portion; and a direction of the chuck portion that is normally directed to a predetermined neutral position. And a panel member for biasing the

The first direction change mechanism is configured to turn the tip of the chuck portion toward the sewing machine shuttle against the urging of the panel member, and the second direction change mechanism includes: A pobin exchanging device characterized in that the tip of the chuck portion is directed toward the pobin stock portion against the bias of the panel member.

5. The panel member is formed of a torsion panel, and a pin that rotates in accordance with the rotation of the chuck section is provided on the chuck section and engages with the torsion panel. The pin displaces the torsion spring when the chuck is rotated via the direction change mechanism of 2, and otherwise, the pin receives the biasing force of the torsion panel to cause the torsion to be displaced. The pobin exchanging device according to claim 4, wherein the pobin exchanging device is returned to a neutral position.

6. Each of the first and second direction change mechanisms has an inclined cam surface, and the popin gripping device includes a cam follower associated with the chuck portion, and the popin gripping device. The pobin exchanging device according to claim 4, wherein the cam follower moves along the cam surface during the movement, whereby the chuck portion is rotated and the direction of the tip is changed.

7. It is a pobin replacement device for replacing the bobbin thread bobbin installed in the sewing machine hook.

A pobin gripping device for gripping the pobin case at the tip of the chuck portion, and a moving mechanism for reciprocating the pobin gripping device between the sewing machine hook and the pobin stock portion,

The chuck portion of the poppin holding device,

An arm gripping claw for pulling out the pobin case arm,

Driving means for rotating the arm gripping claw to pull out the pobin case arm, and

An arm engaging projection for engaging and holding the pobin case arm pulled out by the arm gripping claw;

A pobin exchanging device characterized by comprising: 8-In a sewing machine provided with a plurality of sewing heads, a pobin exchanging device according to claim 1 is provided for each hook corresponding to each sewing head. 9. The moving mechanism includes an evening belt that holds and moves the bobbin gripping device together.

9. The power transmission mechanism according to claim 8, further comprising a common power transmission mechanism for transmitting a driving force of a common motor to the timing belt of the movement mechanism of the pobin exchanging device corresponding to each sewing head. Pobin changing device for multi-head sewing machine.

10. The multi-head sewing machine includes a main body sewing table, and an extended sewing table of an arbitrary size detachable from the main body sewing table.

The pobin stock section is disposed near the front edge of the extension sewing table, and therefore, depending on the extension of the extension sewing table attached to the multi-head sewing machine, the distance between the sewing machine hook and the pobin stock section is increased. Changes,

9. The apparatus according to claim 8, wherein the moving mechanism has a reciprocating movement distance corresponding to a distance between the sewing machine hook and the pobin stock unit. 11. The first turning mechanism is mounted on the side of the main sewing table, the second turning mechanism is mounted on the side of the extended sewing table, and the extended sewing table is separated from the main sewing table. In this state, the moving mechanism is separated from the first and second direction changing mechanisms, and as a result, at least three plots of the main sewing table side, the extended sewing table side, and the moving mechanism side are provided. 10. The multi-head sewing machine pobin exchanging apparatus according to claim 10, wherein the respective components can be separated into blocks.

12. A multi-head sewing machine comprising a plurality of sewing machine heads, wherein the popin exchange device according to claim 4 is provided for each hook corresponding to each sewing machine head. Sewing machine pobin changer.

13. The moving mechanism includes a timing belt that holds and moves the pobin gripping device together,

13. The power transmission mechanism according to claim 12, further comprising a common power transmission mechanism for transmitting a driving force of a common motor to the timing belt of the moving mechanism of the pobin exchanging device corresponding to each sewing head. Multi-head sewing machine popin changer.

14. The multi-head sewing machine includes a sewing table separable from a sewing machine main body, the pobin stock portion is disposed near a front edge of the separable sewing table, and the first direction changing mechanism includes: The second direction changing mechanism is attached to a side of the sewing machine main body, and the second direction change mechanism is attached to the side of the separable sewing table. In a state where the sewing table is separated from the sewing machine main body, the moving mechanism includes the first and second moving mechanisms. It is separated from the second direction changing mechanism, and as a result, each component can be separated into at least three blocks on the side of the sewing machine main body, the side of the separable sewing table, and the side of the moving mechanism. The pobin exchanging device for a multi-head sewing machine according to claim 8, wherein

1 5. This is a poppin changing device to change the bobbin thread bobbin installed in the sewing machine hook.

A pobin gripping device for gripping a pobin case with a chuck portion,

An actuary for selectively performing a gripping operation for gripping a pobin case with the empty chuck portion and a releasing operation for releasing the pobin case from the chuck portion gripping the pobin;

A moving mechanism for reciprocating the poppin holding device between the sewing machine hook and the pobin stock unit together with the actuating machine;

A first cam mechanism for causing the chuck portion of the pobin gripping device to face the sewing machine in the process of moving the pobin gripping device toward the sewing machine by the moving mechanism;

A second cam mechanism for causing the chuck portion of the pobin gripping device to face the pobin stock portion in the process of moving the pobin gripping device toward the pobin stock portion by the moving mechanism;

Means for positioning the chuck portion of the bobbin gripping device in a neutral position during an intermediate movement process between the first cam mechanism and the second cam mechanism; and Alternatively, a pobin case in which a bobbin case containing a bobbin thread pin is exchanged by taking in a pobin case into the chuck portion by the actuating unit at a position in contact with the pobin stock portion or releasing the pobin case from the chuck portion. Exchange equipment.