KR20060090269A - Multi-head sewing machine - Google Patents

Abstract

A multi-head sewing machine, wherein fixing members (10a, 10b, 11a-11d) for fixing a web (N) are formed of a plurality of groups so that the fixing and releasing of the web can be performed for each group. By this, only the fixing of the web at portions not properly stretched can be released, and the fixing of the web at the other portions can be maintained in a fixed state. Accordingly, a worker can fix the web by the fixing members at the released portions in the stretched state by pulling the web at the released portions until the web is properly stretched in a web frame. As a result, the worker can easily fix the web in the properly stretched state by merely pulling only the web at the released portions.

Description

Multi-Duty Sewing Machine {MULTI-HEAD SEWING MACHINE}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a multi-head sewing machine having a plurality of sewing heads capable of simultaneously and continuously sewing a plurality of embroidery and the like on a long fabric. In particular, the present invention relates to a multi-threaded sewing machine which makes it easy to perform sewing by fixing the fabric in an appropriately lengthened state.

Background Art Conventionally, multi-head sewing machines capable of sewing a plurality of embroidery and the like on a long fabric simultaneously and continuously are known. Brief description of the sewing by such a multi-head sewing machine, first, a part of the long fabric supplied from a predetermined source is fixed to a fabric frame controlled to be driven back, front, left, and right on a table of a sewing machine having a plurality of sewing heads. Next, the fabric mold is driven to sew to the fixed portion. When the sewing is finished, the fabric is secured by the fabric frame and the fabric is recovered to the collecting side and the fabric is newly supplied to the fabric frame. In this way, in the conventionally known multi-duty sewing machine, the sewing by a plurality of sewing heads is repeated while sequentially changing the fixing position of the fabric with respect to the fabric frame, so that a plurality of embroidery and the like can be simultaneously and continuously sewn on the long fabric. It is configured to be.

In this type of multi-head sewing machine, the most known type is a feed stand of a fabric wound in a roll shape or a recovery stand that winds up a finished fabric and takes out a plurality of sewing heads in the X direction (right angle with respect to the long direction of the fabric). It is arrange | positioned in the front and rear of the Y direction (long direction of a fabric) of the sewing machine provided in parallel in the direction which consists of, ie, the horizontal direction seen from the front. Therefore, the conveyance direction with respect to the distal end of a distal end is a direction orthogonal to the line direction of the plurality of sewing heads. As a different type from this, Patent Document 1, which is described below, arranges a supply stand and a recovery stand of a fabric to the right and left sides of the sewing machine in which a plurality of sewing heads are installed side by side in the X direction, The technique which made the conveyance direction of the original fabric into the lined direction of a plurality of sewing heads is disclosed. If the conveyance direction of this fabric is made into the direction in which the plurality of sewing heads lined up, many sewing can be performed at once.

Patent Document 1: Patent No. 3368481

In the prior art as described above, the fixing of the fabric to the fabric frame is provided with four clamp members each having a rectangular fabric frame formed by fixing and releasing the fabric by driving an actuator. This is done by sandwiching the fabric. Fixing and releasing the original fabric by such a clamp member is automatically performed at the time of the original fabric conveyance, or is performed by operation of the operation means provided in the operation panel. By the way, when the full length of the fabric to the fabric frame is loose, there is a possibility that the fixing is not appropriate and sewing cannot be performed cleanly, and it is necessary to fix the fabric again by the operation of the operation means. Conventionally, fixing and releasing the fabric to the fabric frame drives actuators of all clamp members, and fixing and releasing all four sides of the fabric frame, even in this case, fixing all four sides of the fabric frame is difficult. Freed. However, if you loosen all four sides of the fabric frame, such as when the tension state of a part of the fabric is loose or when wrinkles occur only on a part of the fabric, the tension state is loose at other points when the fixing is performed again. You may lose or wrinkles may occur. For this reason, careful work is required to make the entire surface of the fabric fixed to the fabric frame properly lengthened, which takes time. In order to properly lengthen the fabric, it is good to fix the fabric in a tightly tensioned state, but conventionally, all four sides of the fabric frame are released at the same time, and when the fabric is strongly pulled, the fabric is supplied from the supply stand or the recovery stand. This loosened, so that the total length of the fabric was inadequate to avoid the occurrence of such a situation. In particular, in multi-head sewing machines using the prior art described in Patent Document 1, that is, the direction of fabric feeding is a direction in which a plurality of sewing heads are lined up, the fabric is fixed to the fabric frame so that the fabric is fixed at both ends of the fabric frame. Since the length of the fabric is long, there is a problem that it is very difficult to properly lengthen the fabric without excessively strong tension.

The present invention has been made in view of the above, and by releasing the fixing member of the group in which the fabric is not properly fixed, pulling only the fabric of the released portion strongly, and fixing only the fabric of the portion again. It is intended to provide a multi-threaded sewing machine in which sewing can be performed by easily fixing the fabric in an appropriately lengthened state.

The multi-head sewing machine according to the present invention is supplied with a long fabric from a source thereof and fixed to a fabric portion fixed to the fabric mold with respect to a fabric mold driven and controlled on a sewing table of a multi-duty sewing machine having a plurality of sewing heads. When the sewing is finished, in the multi-duty sewing machine configured to repeat sewing by changing the position of the fabric portion to be fixed to the fabric frame, the fixing member for releasing the fabric to the fabric frame to be released freely comprises a plurality of groups And it is characterized in that the configuration can be partially performed for each group of the fixing and release of the fabric to the fabric frame.

According to this configuration, the fixing member for fixing the fabric is composed of a plurality of groups, and the fixing and releasing of the fabric can be performed for each of the groups, thereby releasing only the fixing of the fabric of a portion not properly lengthened. On the other hand, with respect to the fixation of the fabric of the other part, it can be kept as it is. Therefore, the worker can make the fabric of the released part suitably lengthen the tension fabric to the fabric frame, and can fix the fabric by the fixing member to the released part in such a state. In this way, the operator can simply sew only the fabric of the released portion, and can easily sew and fix the fabric in a state in which the fabric is properly lengthened.

A multi-head sewing machine according to another aspect of the present invention is to supply and fix a long fabric from its source with respect to a rectangular fabric frame driven and controlled on a sewing table of a multi-duty sewing machine having a plurality of sewing heads, and fixed to the fabric frame. In the multi-duty sewing machine configured to repeat the sewing by sending the fabric in the direction in which the sewing head is lined up when sewing to the fabric portion is finished, changing the position of the fabric portion to be fixed to the fabric frame. At the same time, the fixing member is disposed on each side of the rectangular fabric frame, and at least the fixing member arranged on the horizontal side of the fabric frame, the fixing member arranged on the vertical right side, and the fixing member arranged on the vertical left side It is characterized by being able to fix and release the fabric individually. According to this, the worker can fix the fabric to only the other side of the fabric frame while keeping the fabric fixed only on some sides of the fabric frame, while pulling the fabric on the non-fixed side. In other words, sewing can be performed by easily fixing the fabric in a state in which the fabric is properly lengthened.

According to the present invention, the fixing member for fixing the fabric is constituted by a plurality of groups, and the fixing and release of the fabric can be performed for each group. It can be freed and redone. For example, in the case where the tension state of a part of the fabric is loose or a wrinkle is formed in a part of the fabric, the fixing member of the group in which the fabric is not properly fixed can be released to fix only the fabric of the fabric again. have. At this time, since the fabric is fixed as a fixing member of another group, the fabric of the released part can be strongly tensioned, and the fabric can be easily fixed properly.

In addition, when the tension state of the original fabric is loosely fixed as a whole, the fixing member of one side of the longitudinal side of the original frame is left as it is and the other side is released. Then, the fabric is strongly tensioned from the side opposite to the one side of the fixed side, whereby the fabric can be easily re-scheduled in the tightly stretched state.

BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a top plan view showing one embodiment of a multi-head sewing machine according to the present invention.

FIG. 2 is a perspective view showing the structure of a switch box arranged in the multi-head sewing machine shown in FIG. 1. FIG.

FIG. 3 is a schematic top view for explaining the fixing operation of the original fabric in the multi-head sewing machine shown in FIG. 1.

Preferred Mode for Carrying Out the Invention

EMBODIMENT OF THE INVENTION Hereinafter, embodiment of this invention is described in detail according to an accompanying drawing.

BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a schematic top view showing one embodiment of a multi-head sewing machine according to the present invention. FIG. 2 is a perspective view showing the structure of a switch box arranged in the multi-head sewing machine shown in FIG. 1. FIG. FIG. 3 is a schematic top view for explaining the fixing operation of the original fabric in the multi-head sewing machine shown in FIG. 1. In the multi-head sewing machine shown in this embodiment, the long fabric N is sequentially inputted in predetermined amounts in the left and right directions (ie, the horizontal direction when viewed from the front side of the sewing machine) and set at a predetermined fixed position. A part of the fabric N in the long fabric N is sewn. In FIG. 1 shown here, the state of the multi-head sewing machine in the case of sewing to the fabric N is shown, and the state of the multi-thread sewing machine in the case before sewing to the fabric N is shown in FIG. Hereinafter, the structure and operation | movement of the multi-head sewing machine concerning this invention are demonstrated with each drawing shown in FIGS. 1-3. In addition, in FIG.1 and FIG.3, when the lower surface side of a figure performs a sewing operation | work, it corresponds to the multihead sewing machine front surface in which an operator is actually located.

In the multi-head sewing machine shown in FIG. 1, 1 is a missing frame and 2 is a table. The plurality of sewing heads 3 (here, 12) are provided in the sewing frame 1 so as to maintain a constant distance from each other along the left and right directions (horizontal direction or longitudinal direction) of the multi-head sewing machine shown. The table 2 is formed long in the left-right direction in the figure which becomes the direction through which the original fabric N passes with the continuous addition of the long original fabric N, and on this table 2 the said sewing frame 1 The needle plate 4 is provided so that it may be located in the location corresponding to each sewing head 3 provided in the inside. In addition, a rectangular distal end frame 5 is placed on the table 2, and the distal end frame 5 is an X drive mechanism 6 and a Y drive mechanism 7 provided on the lower right side of the table 2. It is comprised so that it may drive in the front-back, left-right direction according to the X drive body 8 and the Y drive body 9 accompanying the drive of. The fabric frame 5 is configured to have a size sufficient to enclose an area where a plurality of sewing heads 3 can be embroidered, such as embroidery, on a long fabric N at a time. It is formed so that it may become long toward an arrangement direction.

The vertical clamp members 10a and 10b are provided in the both vertical edge parts which comprise the left and right sides of the said fabric frame 5 along each vertical edge part inside. Although not shown, the vertical clamp members 10a and 10b each have an actuator (an actuator for clamping), such as an air cylinder, and a pressing frame inside the side surface thereof, for example. Is moved up and down by reciprocating in and out of the drawing according to the driving of the actuator. By moving this press frame up and down suitably, it can fix and release | release the fabric frame 5 of the fabric N part arrange | positioned corresponding to the fabric frame 5. On the other hand, the two horizontal clamp members 11a, 11b, 11c, and 11d are provided on both horizontal edge portions constituting the front and rear sides of the far end frame 5 in parallel with each horizontal edge portion. These horizontal clamp members 11a-11d are each provided with the pressing frame body (not shown) in the side surface which opposes, respectively, The said pressing frame body is each arrange | positioned at the horizontal clamp members 11a-11d, respectively. With the drive of the actuator (actuator for clamp), it moves up and down to reciprocate in and out of the drawing. By moving this pressing frame up and down appropriately, the horizontal clamp members 11a-11d are the same as the said vertical clamp members 10a, 10b, and fixation and release | release of the fabric N with respect to the fabric frame 5 are performed. It is possible to do it. Further, in the horizontal clamp members 11a to 11d, second actuators (tension actuators) for changing the intervals of the horizontal clamp members 11a and 11c, 11b and 11d facing each other are provided to the horizontal clamp members 11a to 11d. Each is installed. That is, the horizontal clamp members 11a to 11d face each other by fixing the fabric N with respect to the fabric frame 5 with the drive of the first actuator, and subsequently driving the second actuator. The width | variety of each of the horizontal clamp members 11a and 11c, 11b, and 11d is extended, and the original fabric N can be pulled tight.

Horizontal clamp members 11a and 11b located on the front side of the multi-head sewing machine are provided on the supporting member 12, and the supporting member 12 is connected to the horizontal edge portion of the front side of the original frame 5. It is fixed through the member 13. The connecting member 13 can vary the entire length to an appropriate length, and the position of the horizontal clamp members 11a and 11b (support member 12) can be adjusted to the overall width of the fabric N. FIG. It is supposed to be. The fixing and the release of the fabric N to the fabric frame 5 by the vertical clamp members 10a and 10b and the horizontal clamp members 11a to 11d are at the time of conveyance of the fabric N (when subsequently added). Is performed automatically or by a user instruction using an operation panel (not shown). At this time, all the actuators which drive the vertical clamp members 10a and 10b and the horizontal clamp members 11a-11d are driven, and fixation and release of the original fabric N are performed simultaneously in all said clamp members.

In the multi-head sewing machine according to the present invention, the above-described operation is performed, and in operation different from the above-described operation, only a predetermined clamp member is driven for each of the plurality of groups described below to fix and release the fabric N. (N) It can be performed separately in each location.

(1) Fixing and releasing only the right side of the fabric N by the vertical clamp member 10a on the right side.

(2) Fixing and releasing only the left side of the distal end N by the left vertical clamp member 10b.

(3) Fixing and releasing the front and rear sides in the right end portion of the distal end N by the right horizontal clamp members 11a and 11c, and adjusting the gap between the opposite horizontal clamp members 11a and 11c.

(4) Fixing and releasing the front and back sides in the left portion of the distal end N by the left horizontal clamp members 11b and 11d, and adjusting the gap between the opposite horizontal clamp members 11b and 11d.

This will be described in detail below.

The sewing box 1 is provided with a switch box 14 provided with a plurality of switches for instructing fixing and release of the distal end N by driving a predetermined clamp member in each of the groups described above. The switch box 14 is fixed to the sewing machine frame 1 via the pipe member 15 so that an operator's hand easily touches it. The detailed structure of this switch box 14 is demonstrated using FIG. As shown in FIG. 2, four toggle switches are provided in the switch box 14. The left and right selection switch 16a disposed at the upper end is a left and right group selection switch for switching left and right groups, and when the left and right selection switch 16a is turned over to the right, the left side is selected, Is selected. The three switches 16b, 16c, and 16d disposed at the lower ends of the left and right selection switches are ON / OFF switches for driving the actuators of the respective clamp members, respectively. That is, the actuator drive switch 16b on the right side is the actuator (clamp actuator) of the vertical clamps 10a, 10b, and the center actuator drive switch 16c is the second actuator (tension) of the horizontal clamp members 11a-11d. The actuator drive switch 16d on the left side of the actuator is an on / off switch for driving the first actuator (actuator for clamping) of the horizontal clamp members 11a to 11d, respectively, as shown below. According to the selected state of the switch 16a, an on-off instruction for driving the actuator to be controlled differently is given.

When the group on the right side is selected by the left / right selection switch 16a, the actuator (actuator for the clamp) of the right vertical clamp member 10a can be driven by the operation of the actuator drive switch 16b, and the actuator drive According to the operation of the switch 16c, the second actuators (tension actuators) on the right side horizontal clamp members 11a and 11c can be driven, and the right side horizontal clamp members 11a and 11c can be driven by the operation of the actuator drive switch 16d. The first actuator (actuator for clamp) can be driven. On the other hand, when the group on the left side is selected by the left / right selection switch 16a, the actuator (the actuator for the clamp) of the left vertical clamp member 10b can be driven by the operation of the actuator drive switch 16b, According to the operation of the actuator drive switch 16c, the second actuator (tension actuator) on the left side can be driven according to the operation of the actuator clamping switch 16d, and the horizontal clamp member 11b on the left side according to the operation of the actuator drive switch 16d and It is possible to drive the 11d first actuator (actuator for clamp). That is, with respect to the actuator drive switch 16b and the actuator drive switch 16d, when the switch is turned to the right, for example, when turned off, the actuator of the corresponding clamp member is driven to release the fixing of the far end N. When the switch is turned to the left and turned on, the operation of fixing the far end N in the corresponding clamp member is performed. With respect to the center actuator drive switch 16c, when the switch is turned to the right, the corresponding horizontal clamp member is moved to narrow the gap with the opposite horizontal clamp member, and when the switch is turned to the left, the selected clamp member is moved to face the An operation of widening the interval with the horizontal clamp member is performed.

Next, the fixing operation | movement of the fabric N to the fabric mold 5 in the multi-head sewing machine of the above-mentioned structure is demonstrated briefly according to the procedure performed at the time of sewing to fabric fabric N. FIG. The original fabric N is supplied from the original roll of the supply stand which is not shown arrange | positioned at the right side of this multi head sewing machine, passes through the table 2, and the unrecovered collection stand which was arrange | positioned at the left side of this multi head sewing machine on the opposite side. It is intended to be led to. When the fabric N is to be set, the fabric frame 5 is moved to both the sewing machine front side (lower side in the figure), and as shown in Fig. 3, the fabric N is directly guided from the supply stand to the collection stand. It is arrange | positioned at the corresponding position. Then, after passing through the fabric frame 5 so that the fabric N continuously introduced from the supply stand can be fixed by each clamp member, the fabric N is guided to the recovery stand. In this state, when the operator operates a predetermined operation panel (not shown), the actuators of the vertical clamp members 10a and 10b and the horizontal clamp members 11a to 11d are driven to dispose the fabric (5) with respect to the fabric frame 5. Fix N). The fixing of the far end N to be executed here is driven by first driving the actuators (clamp actuators) of the longitudinal clamp members 10a and 10b to grip both longitudinal sides of the far end N, and then to the horizontal clamp member 11a. 11d) to drive the first actuator (clamp actuator) to grip both side edges of the distal end N, and then to drive the second actuator (tension actuator) of the horizontal clamp members 11a to 11d to transverse clamp. This is done by moving the members 11a to 11d, and the fabric N is fixed to the fabric frame 5 in a taut state.

When the fabric N is fixed with respect to the fabric frame 5, the operator presses the "sewing start switch" disposed on the operation panel or the like to start the multi-head sewing machine. When the sewing machine is started, the fabric frame 5 is driven back, front, left, and right, and sewing to the fabric N fixed to the fabric frame 5 is performed. When the sewing to the fabric N fixed to the fabric frame 5 is finished, the fabric frame 5 is returned to the position shown in FIG. 3, and the vertical clamp members 10a and 10b and the horizontal clamp members 11a to 11d are finished. Actuator is driven to release the fixation of the fabric (N) to the fabric frame (5). When releasing the fixation of the fabric N, the order of driving the actuators of the respective clamp members is in a reverse order to the order performed when the fabric N is fixed. When the fixing of the fabric N is released, the portion where the fabric N is sewn (that is, the area where the sewing head 3 can sew embroidery or the like to the long fabric N at a time) is placed on the recovery stand. At the same time as it is recovered, the fabric N of the portion to be sewn next is sent from the fabric roll of the supply stand onto the fabric frame 5. The recovery stand has a drive source for recovering the original fabric N, and is capable of recovering the original fabric N by driving the drive source in association with the transfer of the original fabric N. When the fabric N is recovered to the collection stand, when the fabric N of the portion to be sewn next is sent onto the fabric frame 5, the recovery to the collection stand is stopped, and the vertical clamp members 10a, 10b) and the horizontal clamp members 11a-11d are fixed to the original fabric frame 5, and the sewing machine is restarted and sewing is performed. In this way, in the multi-threaded sewing machine, sewing is successively and continuously sewn on the long fabric by repeating the sewing sequentially while changing the fixing position of the fabric N to the fabric frame 5.

The operation after pressing the "sewing start switch" mentioned above is an operation performed automatically. That is, fixing and releasing of the fabric N to the fabric frame 5 is performed only by the operation of the operation panel by the operator only for the first fixing, and thereafter, the fabric (N) is transported according to the transfer of the fabric N. Fixing and releasing of N) is performed automatically. By the way, when the fabric N is fixed and released automatically according to the conveyance of the fabric N, the fabric N is not fixed in a state of being properly lengthened with respect to the fabric frame 5 for some reason. If something does not happen, it is impossible to sew cleanly on the fabric N, and the state is bad. Therefore, when the fabric N is not properly lengthened with respect to the fabric mold 5, the operator presses the "stop switch" arranged on the operation panel or the like to stop the multi-threaded sewing machine, and It is necessary to fix the original fabric N again according to the fixing state of N). Therefore, next, the work which an operator should perform when the fabric N is not fixed in the state fully extended with respect to the fabric frame 5 is demonstrated using two specific examples shown below.

As a first specific example in which the fabric N is not properly lengthened with respect to the fabric frame 5, for example, when wrinkles occur in the left portion of the fabric N fixed to the fabric frame 5. It demonstrates. In this case, each switch 16a to 16d of the switch box 14 is operated to release the fixing of the far end N of the left vertical clamp member 10b and the horizontal clamp members 11b and 11d. Reconsider only the freed parts. That is, first, the left and right selection switch 16a is turned over to the left to select a group on the left side, and then the actuator drive switches 16b, 16c and 16d are turned over to the right to release the fixing of the far end N. FIG. In this way, the right part of the fabric N with respect to the fabric frame 5 is fixed, and it is easy for the worker to tension the left part of the released fabric N, and the switch box 14 is pulled while pulling the fabric N. The left part of the far end N can be fixed again by turning the actuator drive switch 16b-16d of () to the left. Thereby, the original fabric N is fixed in the state in which the wrinkle-tight state which pulled out in the left part was pulled tight. Thus, by releasing only the fixing of the part which is not properly lengthened and leaving the fixing of the other part intact, only the fabric N of the released part can be tensioned and properly lengthened. It is possible to easily re-fix the fabric N simply by pulling only the fabric N of the freed portion. In this case, the actuator drive switch 16c may not be operated. That is, it is not necessary to perform the operation for widening the interval in the left and right directions.

As a second specific example in which the fabric N is not properly lengthened with respect to the fabric frame 5, a case where the overall length of the fabric N fixed to the fabric frame 5 is loosened as a whole will be described. . In this case, each switch 16a-16d of the switch box 14 is operated, and the fixation of the far end N of the left vertical clamp member 10b and all the horizontal clamp members 11a-11d is released. Thereby, the far end N is fixed only by the vertical clamp member 10a of the right side. Then, the fabric N is pulled from the recovery stand side, and the fabrics N are fixed again by operating the respective switches 16a to 16d of the switch box 14 while pulling the fabric N in the pulled state. . As a result, the original fabric N is fixed in a state in which the whole fabric is taut. Thus, even when the fixation of the fabric N is not adequately lengthened as a whole, by clamping the clamp member on one side of the fabric frame 5, the fabric N is strongly tensioned from the opposite side of the fixed portion. By making it possible to appropriately lengthen the electronic device, the worker can easily re-fix the fabric N. FIG.

As described above, in the multi-head sewing machine according to the present invention, the fixing and disengaging of the distal end N of each clamp member can be performed for each group, so that the disassembly of the distal end N can be easily performed. .

In addition, in the case where the sewing to the fabric N is automatically and continuously introduced as described above, it may be difficult to confirm whether the fabric N is properly lengthened, or it may be late to stop the sewing machine. Therefore, when the fabric N is sent and the fabric N of the portion to be sewn next is fixed, the multi head sewing machine is automatically stopped once, and the operator presses the start switch to restart the multi head sewing machine. good. By doing so, it is advantageous for the worker to be able to check with a margin whether or not the fabric N is being fixed in a properly lengthened state.

Moreover, you may make it possible to fix and release | release each clamp member for each group also by operation | movement of a switch or other operator etc. which were provided in the operation panel. In this case, it goes without saying that the switch box 14 may be unnecessary.

The present invention also applies to a case where the conveyance direction of the fabric N to the fabric frame 5 is a direction orthogonal to the direction in which the plurality of sewing heads 3 line up (that is, the front-rear direction from the front of the sewing machine). Can be applied.

In addition, the embodiment has a drive source for recovering the fabric (N) in the recovery stand, and driven in conjunction with the transfer of the fabric (N) to recover the fabric (N), but is not limited to this, the operator manually May be configured to send the fabric N to the collection stand. In such a case, sewing to the fabric N fixed to the fabric frame 5 is finished and the fabric frame 5 is returned to the position shown in FIG. 3 to release the fixation of the fabric N. You can stop it.

As described above, the present invention relates to a multi-head sewing machine having a plurality of sewing heads capable of sewing a plurality of embroidery and the like on a long fabric simultaneously and continuously. In particular, it can be used for a multi-head sewing machine which makes it easy to perform sewing by fixing the fabric in an appropriately lengthened state.

Claims (3)

With respect to the fabric frame driven and controlled on a sewing table of a multiple head sewing machine having a plurality of sewing heads, when a long fabric is supplied from its source and fixed, and sewing to the fabric portion fixed to the fabric frame is finished, As a multi-head sewing machine configured to repeat sewing by changing the position of the fabric portion to be fixed to the fabric frame, A multi-threaded sewing machine comprising: a fixing member for releasing the fabric to the fabric frame in a plurality of groups, and configured to partially fix and release the fabric to the fabric frame for each group. . With respect to a rectangular fabric frame driven and controlled on a sewing table of a multi-duty sewing machine having a plurality of sewing heads, a long fabric is supplied and fixed from a source thereof, and when sewing to the fabric portion fixed to the fabric frame is finished, the fabric is finished. As a multi-head sewing machine configured to send the sewing head in the direction lined with, and repeat sewing by changing the position of the fabric portion to be fixed to the fabric frame, A fixing member for fixing the fabric is placed on each side of the rectangular fabric frame, and at least a fixing member arranged on the horizontal side of the fabric frame, a fixing member arranged on the vertical right side, and a vertical left side A multi-threaded sewing machine, characterized in that the fixing members arranged can each individually fix and release the fabric. The method according to claim 1 or 2, Drive means for driving each of the fixing members to a fixed position or a release position with respect to the distal end; and control means for controlling the respective fixing members to be driven individually with respect to the driving means; Multi-threaded sewing machine, characterized in that each of the fixing and release of the fabric to the fabric frame in accordance with the individual drive control of the fixing member by the drive means and the control means, respectively.

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