WO1998004768A1

WO1998004768A1 - Thread supplying device for sewing machine for embroidery

Info

Publication number: WO1998004768A1
Application number: PCT/JP1997/002601
Authority: WO
Inventors: Toshio Miyamoto
Original assignee: Miyamoto Giken Yugen Kaisha
Priority date: 1996-07-30
Filing date: 1997-07-28
Publication date: 1998-02-05
Also published as: EP0921225A1; KR20000029458A; JP3162082B2; JP3192153B2; JP2000073273A; CN1225697A; WO1998004769A1; EP0921225A4

Abstract

Provided is a thread supplying device for sewing machines for embroidery. The thread supplying device comprises a unitarized bobbin storage section (22) arranged in an upper part of a sewing machine head and capable of storing a plurality of bobbins, a nipper bar actuating mechanism (24) provided with thread tension adjusting mechanisms (25) and thread forwarding mechanisms (28), both of which are provided in accordance with the number of bobbins that can be stored, and a thread selecting mechanism (29) for selectively positioning a thread forwarding mechanism corresponding to a bobbin used, above a threader device corresponding to a predetermined needle, the bobbin storage section and the thread tension adjusting mechanism being constructed so as to be capable of being divided. At the time of color thread change and thread breakage, changing either of the divided units can shorten a time for processing.

Description

Thread supply device for sewing machine

TECHNICAL FIELD The present invention relates to a stimulating sewing machine, and in particular, performs a process of replacing colored thread (hereinafter, sometimes simply referred to as “thread” or “upper thread”) or processing when a thread breaks. The present invention relates to an embroidery sewing machine which can be automatically performed without using a sewing machine. Background art

Conventionally, in an embroidery sewing machine, when a color thread is replaced or when a thread breaks, processing and the like have been performed manually.

By the way, the sewing machine must be stopped when exchanging the color thread or when the thread breaks, etc. In particular, when exchanging the color thread, one sewing machine When the number of sewing machines is usually several or more, it is necessary to change the color thread for each of the sewing heads equipped with about 30 heads. However, there was a problem that the operating rate and productivity decreased. Disclosure of the invention

The present invention solves the above-mentioned problems of the conventional embroidery sewing machine, and makes it possible to automatically perform processing such as replacement of a color thread or breakage of a thread without manual intervention. At the same time, the time required for the sewing machine can be shortened. The purpose is to provide.

In order to achieve the above object, a thread supply device in a embroidery sewing machine according to the present invention includes: a bobbin storage section that can store a plurality of bobbins disposed above a sewing head of a stimulating sewing machine; A thread adjusting mechanism equipped with a thread tension adjusting mechanism and a thread sending mechanism provided corresponding to the number of storable bobbins and a thread sending mechanism corresponding to the required pobin And a thread selection mechanism selectively positioned above the threading device.

ADVANTAGE OF THE INVENTION According to the thread supply device in the embroidery sewing machine of the present invention, processing such as replacement of a colored thread or when a thread breaks can be automatically performed without manual intervention, and the time required for the processing itself is reduced. Therefore, the operating rate and productivity of the machine can be improved.

Then, according to the thread supply device in the embroidery sewing machine, the thread can be smoothly sent out toward the needle, whereby the threading accuracy can be improved.

In this case, the pobin storage section is formed into a unit, and if necessary, is formed so that it can be divided into a plurality of parts, and is detachably attached to the sewing machine head. At the time of replacement, the unit can be replaced for each unit, thereby shortening the time required for these operations.

In addition, by forming the main body of the thread adjusting mechanism in a semi-cylindrical shape and configuring the thread selecting mechanism with an automatic mechanism, the thread feeding device and, consequently, the shape of the embroidery sewing machine can be downsized and the thread selecting mechanism can be simplified. can do.

In addition, the main body of the thread adjusting mechanism is formed in a rectangular shape in a plane, and the thread selecting mechanism is configured with a sliding mechanism, so that the structure of the thread selecting mechanism and, consequently, the embroidery sewing machine is improved. The size can be simplified, and the size of the yarn supply device can be easily determined according to the number of required pobins.

Further, by forming the main body of the thread adjusting mechanism in a divided manner, it is possible to replace one of the divided units when exchanging the thread breakage of the pobin or the color thread, thereby reducing the number of units to be used. The time required for these operations can be reduced without increasing the cost. BRIEF DESCRIPTION OF THE FIGURES

FIG. 1 is a front view showing a first embodiment of a thread supply device in a stimulating sewing machine according to the present invention, FIG. 2 is a side view thereof, FIG. 3 is a plan view thereof, and FIG. FIG. 3 is a sectional view taken along line A-A of FIG.

FIG. 5 is a perspective view showing a thread holding body of a thread feeding device in a sewing machine according to a second embodiment of the present invention. FIG. 6 shows a thread tension releasing mechanism. FIG. 5 (a) is a side view. , (B) is a front view, FIG. 7 shows a yarn length adjusting mechanism, (a) is a side view, (b) is a plan view, FIG. 8 shows a yarn feeding mechanism, ) Is a side view, (b) is a front view, and (c) is a perspective view.

FIG. 9 is a front view showing a modified example of the first embodiment of the thread supply device in the stimulating sewing machine of the present invention. FIG. 10 is a side view thereof, and FIG. 1 is a plan view of a main part thereof. FIG. 2 is a perspective view of the main part.

FIG. 13 is a side sectional view showing a thread holder of a modification of the first embodiment of the thread supplying device in the stimulating sewing machine of the present invention.

FIG. 14 shows a first embodiment of a threading device for an embroidery sewing machine according to the present invention, wherein (a) is a side view and (b) is a front view.

FIG. 5 is a front view of a thread tensioning mechanism of the threading device of the sewing machine of the present invention, FIG. 16 is a side view of the thread tensioning mechanism, and FIG. Yarn tensioning machine (A) is a plan view, (b) is a side view, (c) is a front view, FIG. 18 shows a threading mechanism, (a) is a side view, b) is a front view, (c) is a plan view, FIG. 19 is an explanatory view showing an operation state of a thread pushing mechanism of the threading mechanism, and FIG. 20 is a perspective view of a main part of the threading mechanism. Fig. 21 shows a thread pulling mechanism, (a) is a plan view, (b) is a side view, (c) is an exploded perspective view, and Fig. 22 shows a thread cutting mechanism. ) Is a plan view, (b) is a front sectional view, FIG. 23 shows a cut thread collecting mechanism, (a) is a front view, (b) is a plan view, and FIG. 24 is a state of a thread. 3A and 3B show a sensor to be detected, wherein FIG. 3A is a plan view and FIG. 3B is a perspective view.

FIG. 25 is a front view showing a second embodiment of the staple sewing machine of the present invention. FIG. 26 shows a thread holder of a second embodiment of the thread supply device in the embroidery sewing machine of the present invention, wherein (a) is a front view, (b) is a side view, and (c) is a plan view. FIG. 27 is a side view of the thread supply device in the stimulating sewing machine of the present invention. FIG. 28 shows a modified example of the second embodiment of the thread supply device in the staple fiber sewing machine of the present invention. FIG. 29 is a perspective view, FIG. 30 is a front view of a thread adjusting mechanism, and FIG. 31 is a cross-sectional view of a main part of a pipe member. FIG. 32 is a sectional view of a main part of the thread adjusting mechanism.

FIG. 33 is a front view of a second embodiment of the threading device for a staple fiber sewing machine according to the present invention, and FIG. 34 is a side view thereof.

FIG. 35 shows a modified example of the thread clamping member of the thread tensioning mechanism. (A) is a front view, (b) is a plan view, (c) is a side view, and FIG. 36 is a perspective view thereof. Fig. 37 is a perspective view of a thread pull-out mechanism, Fig. 38 is a perspective view of a modified example of the thread pull-out mechanism, Fig. 39 shows a thread recovery mechanism, and (a) is a plan view. (B) is a front view, and FIG. 40 is a perspective view thereof. BEST MODE FOR CARRYING OUT THE INVENTION

An embodiment of an embroidery sewing machine according to the present invention will be described below with reference to the drawings. As shown in FIGS. 1 and 2, the embroidery sewing machine comprises a plurality of sewing machine heads 1-a threading device 7 including a thread supply device 2, a thread tensioning mechanism 3, and a threading mechanism 6, and a balance mechanism. 4. The main part is composed of the auxiliary mechanism 5 such as the cut thread collection mechanism. C The figure of this embodiment is equipped with about 30 heads when there are more than several heads per embroidery sewing machine. This is an example of one of the sewing heads used. The same configuration as that of the embodiment is applied to other sewing heads other than those shown in the figure, and each sewing head can be synchronously driven by various common driving sources. If necessary, a clutch is interposed between the common drive source and each sewing machine head, or an independent drive source is provided for each sewing machine The head can be driven independently, but these mechanisms are not fundamentally different from the conventionally known sewing machines.

Further, it is preferable that the thread supply device 2, the auxiliary mechanism 5 such as the cut thread collecting mechanism, and the threading device 7 provided in the sewing machine head of the embroidery sewing machine of this embodiment have all of them. However, in some cases, some of the devices may be replaced with another mechanism having the same effect, or may be omitted. In this embodiment, air cylinders, solenoids, and the like used as drive sources for various drive mechanisms may be replaced with other appropriate drive sources as needed, although not described each time.

Further, in this embodiment, the connection between the various drive mechanisms and the drive source is performed by connection mechanisms such as a link mechanism, a lever mechanism, and a wire mechanism. However, this connection mechanism is not described each time, but is necessary. Can be replaced with another appropriate connection mechanism other than the embodiment according to the above. In this embodiment, as the high-pressure air source used to feed the yarn toward the needle, and the high-pressure air source used to drive the air cylinder, any other low-pressure air generator besides the compressor may be used. Can be.

These points are the same in the following other embodiments.

FIGS. 1 to 8 show a first embodiment of a thread supply device 2 disposed above a sewing head 1 of a stitch I sewing machine.

The thread supply device 2 has a number of bobbins 21 that can accommodate a plurality of bobbins 21 that can store a plurality of colored thread pobbins 21 and a bobbin 21 that is integrated with the bobbin storage 22. A semi-circular 糸 shape provided with a thread tension adjusting mechanism 25 provided with a thread, a thread length adjusting mechanism 27 that holds the thread 11 sent out toward the needle 10 by a predetermined length, and a thread sending mechanism 28 A thread adjusting mechanism 24 having a main body 24 a and a thread feeding mechanism 28 corresponding to a required pobin 21 are selectively provided above a threading device 7 for threading a predetermined needle 10. And a thread selection mechanism 29 positioned at

In the present embodiment, the pobin storage section 22 and the thread adjuster jig 24 provided integrally therewith are configured as a unit, and this is detachably attached to the sewing machine head 1. .

The bobbin storage section 2 2 is, for example, configured to store a total of 18 pobins 2 1 傾斜 2 inclining slightly forward in the upper row and 6 horizontally in the lower row. 2 2, a spindle 2 2 a for inserting and supporting the pobin 21 on the bottom surface thereof, and a thread holder 2 for pulling out the thread 11 of each bobbin 21 so as not to be entangled at the upper portion thereof. 3 is provided, a total of 18 yarns 1 1 are pulled out from the yarn holder 2 3 at an interval, and are attached integrally to the lower part of the pobin housing 2 2. Send it to 5. The thread holding body 23 has a threading hole 23 b that is provided between the bobbin 21 and a threading hole 23 b for pulling out the thread 11 so that the thread 11 is not entangled. Two 3 a is movably arranged above the pobin 2 、, and a notch 2 3 d formed at the base of the moving piece 23 a is a projection 2 3 The moving piece 23a is fixed at a predetermined position by fitting to e.

By disposing the movable piece 23 a so as to be movable, the bobbin 21 can be easily attached to and detached from the bobbin housing 22.

An axial groove 23 f is formed at the upper end of the driving piece supporting shaft 23 c, and the upper end of the groove 23 f is slightly widened to form the base of the driving piece 23 a. To prevent it from coming out of the moving piece support shaft 23c.

The thread tension adjusting mechanism 25 includes three thread tension adjusting members 2 for each 1 mm of the thread from each bobbin 2 られ provided on the outer peripheral surface of the semi-cylindrical body 24 a of the thread adjusting mechanism 24. 5 a, 25 b, and 25 c.

A tension sensor 25d for measuring the tension of the yarn 11 is provided on one of the yarn tension adjusting members 25c, so that a yarn breakage of the yarn 1 糸 can be detected.

The signal from the tension sensor 25 d is converted into an electric signal from an electric contact (not shown) provided on the thread adjusting mechanism 24 to an electric circuit (shown in the drawing) provided with an electric contact provided on the sewing machine head 1. (Not shown) sent to the control unit of the embroidery sewing machine via-The display lamp (not shown) that controls the drive of the embroidery sewing machine and displays the state of the upper thread and lower thread installed on the sewing machine head 1 etc. Is turned on to inform the re-worker of thread breakage.

In addition to the display lamp, a display device such as a liquid crystal display panel for displaying the state of the embroidery sewing machine to an operator and an alarm device such as a buzzer can be provided at an appropriate position of the stimulating sewing machine.

Also, when sending out the yarn 11 toward the needle 10, the yarn による 1 is held by the yarn tension adjusting member 25 b so that a large resistance is not applied to the yarn 11. A thread tension release mechanism 26 to be released is provided.

As shown in FIG. 6, the thread tension releasing mechanism 26 is operated by a thread tension releasing plate 26 b which is operated by a solenoid 26 a provided on the sewing machine head side. The spring of the thread tension adjusting member 25b is compressed through 26c to release the holding of the thread 11 by the thread tension adjusting member 25b.

A thread length adjusting mechanism 27 provided below the thread tension adjusting mechanism 25 is for holding a predetermined length of the thread 11 to be sent out toward the needle 10. The thread 11 held by 7 is sent out by releasing the thread length adjusting mechanism 27 when the tip of the thread 11 is guided to the vicinity of the needle 10 by the threading device 7, and sewn. A thread 11 of a predetermined length required at the start of the work is inserted through the needle 10.

As shown in FIG. 7, the thread length adjusting mechanism 27 is provided with a thread length adjusting piece 2 slidably operated by a solenoid (not shown) through a wire 27a and a lever 27b. By projecting the thread 7c, the thread 1〗 is held for a predetermined length, and the thread 1 調節 held by feeding back the thread length adjusting piece 27〗 is sent out.

In this case, the tip of the thread length adjusting piece 27c is formed in a concave shape so as to easily hold the thread # 1.

A thread sending mechanism 28 provided on the outer peripheral surface of the semicircular main body 24 a of the thread adjusting mechanism 24 below the thread length adjusting mechanism 27, feeds the thread 1 向け toward the needle〗 0. As shown in Fig. 8, it is connected to a yarn delivery pipe 28a for guiding the yarn〗 1 above the threading device 7 and a high-pressure air source (not shown). And an air nozzle 28 b for sending out the yarn 1 to the threading device 7.

In this case, the air nozzle 28 b is positioned at the threading position, The air nozzle 28b is fixed so that the open end of the air nozzle 28b is located near the upper opening of the thread delivery tube 28a located above the threading device 7, and the thread delivery tube located above the threading device 7. Attach a torsion spring 28c except for the thread delivery tube 28a located above the threading device 7 so that the threading device 7 can pinch the thread 11 hanging from 28a accurately. The thread sending tube 28a is tilted about the drive shaft 28d by the force, and the thread sending tube 28a located above the threading device 7 is fed to the sewing machine. By contacting the attitude holding piece 28 e fixed to 1 or operating it with an appropriate drive mechanism (not shown), it can be raised by the urging force of the screw spring 28 c. I do.

The thread selection mechanism 29 is selectively positioned above the threading device 7 for threading the thread delivery pipe 28 a of the thread delivery mechanism 28 corresponding to the required bobbin 21 to a predetermined needle 0. A spindle 29 a disposed on the sewing machine head 1 for movably mounting the thread adjusting mechanism 24 via its bottom plate 24 b, and a drive source (not shown) ) The rotating body 29 b oscillatingly driven by the support shaft 29 a as a rotating shaft by the link 29 c connected to, and a through-hole 24 formed in the bottom plate 24 b of the thread adjusting mechanism 24 and a pin 29 d protruding from the driving body 29 b for driving the thread adjusting mechanism 24 together with the driving body 29 b.

In this case, in order to accurately position the thread delivery pipe 28a of the thread delivery mechanism 28 corresponding to the required pobin 21 over the threading device 7 for threading the predetermined needle 10, the drive source (Not shown) A positioning roller 29 h is provided at the end of a moving body 29 g driven by a link 29 e connected to the link 29 e and the driving shaft 29 f as a driving axis. The roller 29 h is fitted to the gear 24 d engraved on the periphery of the bottom plate 24 b of the thread adjustment mechanism 24 at the angle of the thread delivery tube 28 a of the thread delivery mechanism 28. .

In this case, the thread selection mechanism 29 is controlled by the control unit of the embroidery sewing machine. By storing in advance the type (color) of each bobbin 21 stored in the pobin storage section 22 in the control section, a large number of color yarns can be automatically selected. I do.

In addition, a thread insertion hole is provided at an appropriate position on the outer peripheral surface of the semicircular main body 24a of the thread adjusting mechanism 24 in order to hold the thread 11 from each pobin 21 so as not to be entangled. It is desirable to provide thread holders 20a, 20b, 20c, 20d, and 20e formed at substantially equal intervals.

Further, the thread tension adjusting mechanism 25 and the thread sending mechanism 28 constituting the thread adjusting mechanism 24 correspond to the number of bobbins 2 可能な that can be stored in the bobbin storing section 22, that is, in this embodiment, , 18 sets are provided on the outer peripheral surface of the semi-cylindrical body 24 a of the thread adjusting mechanism 24, but the thread tension releasing mechanism 26, the thread length adjusting mechanism 27, and the thread sending mechanism 28, one air nozzle 28b and one attitude holding piece 28e are provided on the machine head 1 side, and one of these 18 mechanisms at a given position It shall be shared by operation or coordination with those in place, ie 18 sets of these mechanisms. In addition, the unit in which the pobin storage unit 22 and the thread adjusting mechanism 24 integrally provided with the pobin storage unit 22 are united (hereinafter referred to as “unit”) is desirably the number of heads of the sewing machine 1. Prepare multiple multiples of. Thereby, when exchanging the color thread, it is possible to shorten the time required for exchanging the color thread by exchanging the whole unit. For example, if the unit of this embodiment is prepared twice as many as the number of heads of the sewing machine, it is possible to exchange color threads of up to 36 colors in a short time. In this case, the type (color) of each bobbin 21 stored in the bobbin storing section 22 is stored in advance in the control section of the sewing machine for stimulating fiber, so that the unit can be simply replaced. A large number of color yarns can be exchanged automatically.

Further, in this embodiment, the bobbin storage section 22 and the The thread adjusting mechanism 24 is configured as a unit, and it is attached to and detachably attached to the sewing machine head 1.These forces can also be fixed and attached integrally to the sewing machine head 1. .

Further, in this embodiment, the thread delivery tube 28 a of the thread delivery mechanism 28 corresponding to the required bobbin 21 is selectively positioned above the threading device 7 for threading a predetermined needle 0. For this purpose, the yarn selecting mechanism 29 is used to drive the yarn adjusting mechanism 24 with the support shaft 29 a as a driving axis, but as the yarn selecting mechanism, a mechanism that slides in a horizontal plane is used. Can also be adopted.

Next, FIGS. 9 to 13 show modified examples of the first embodiment of the thread supply device 2 disposed above the sewing machine head 1 of the embroidery sewing machine.

This thread supply device 2 has a number of bobbins 2 1 that can be stored, and a bobbin storage section 2 2 that can store a plurality of bobbins 2 1 of color yarn, and a bobbin storage section 22 that is integrated with the bobbin storage section 2 2. The thread tension adjusting mechanism 25 provided, the thread length adjusting mechanism for holding the thread 11 to be sent out toward the needle 10 by a predetermined length (not shown; refer to the above-mentioned first embodiment), and the thread delivery A thread adjusting mechanism 24 having a semicircular 简 -shaped main body 24 a having a mechanism 28 and a thread feeding mechanism 28 corresponding to a required bobbin 21 and threading a predetermined needle 10 And a yarn selecting mechanism 29 selectively positioned above the device 7.

In the present embodiment, the bobbin storage section 22 and the upper half of the yarn adjustment mechanism 24 provided integrally therewith, that is, the yarns provided corresponding to the number of bobbins 2 可能な that can be stored. As shown in detail in FIGS. 9 and 12, the tension adjusting mechanism 25 is divided into two equal parts on the left and right sides to form a unit (hereinafter, referred to as “units 2A and 2B”). However, this is detachably attached to the thread selection mechanism 29 provided on the sewing machine head 1 via the bottom plate 24 b of the thread adjusting machine 24. For example, the pobbin storage section 22 is configured to store a total of 18 bobbins 21 on the left and right sides, each of which is inclined slightly upward in the upper row, and each of the 9 bobbin storage sections 22 has a bobbin storage section. The spindle 22a for inserting and supporting 21 is set up, and the bobbin guide 22b suitable for the pobin 21 to be used is arranged around the spindle 22a so that the thread 11 of each bobbin 21 is not entangled on the bottom surface. Lay a piece of felt 22c to pull it out.

A thread holder 23 is provided on the spindle 22a, and a total of 18 threads 11 are pulled out from the thread holder 23 at an interval, and the thread adjusting mechanism 24 is integrally attached to the lower portion of the bobbin housing 22. Feed it into the thread tension adjusting mechanism 25. The thread holder 23 includes a guide plate 23p disposed at the upper end of the spindle 22a, a ceramic guide tube 23q disposed at the upper end opening of the spindle 22a, and a hollow tube of the spindle 22a. Path 23 r and a pipe member 23 s communicating with the hollow conduit 23 r, and the yarn 1 の of each bobbin 21 passes through the hollow conduit 23 r of the spindle 22 a and the pipe member 23 s. The thread is sent to the thread tension adjusting mechanism 25.

In this case, by changing the amount of protrusion of the tip of the pipe member 23s between the adjacent pipe members 23s, it is possible to easily hold the yarn 11 derived from the pipe member 23s.

The operation of inserting the yarn 11 into the hollow conduit 23r and the pipe member 23s of the spindle 22a can be easily performed by blowing a high-pressure airflow together with the yarn 11 from the upper end opening of the guide tube 23q. It can be carried out.

The thread tension adjusting mechanism 25 includes three thread tension adjusting members 25 a, provided on the outer peripheral surface of the semicircular main body 24 a of the thread adjusting mechanism 24, for each thread 11 from each bobbin 2 1. It has 25b and 25c.

One of the yarn tension adjusting members 25 c has a tension for measuring the tension of the yarn 11. A force sensor 25d is provided to detect breakage of thread # 1. The signal from the tension sensor 25 d is converted into an electric signal from an electric contact (not shown) provided on the thread adjusting mechanism 24 to an electric circuit (shown in the drawing) provided with an electric contact provided on the sewing machine head 1. (Not shown) is sent to the control unit of the embroidery sewing machine to control the drive of the embroidery sewing machine and to display the status of the upper thread and the lower thread arranged on the sewing machine head 1 etc. (not shown) Is turned on to inform the worker of thread breakage of thread # 1.

In addition to the display lamp, a display device such as a liquid crystal display panel for displaying the state of the embroidery sewing machine to an operator and an alarm device such as a buzzer can be provided at an appropriate position of the embroidery sewing machine.

Also, in order to prevent a large resistance from being applied to the thread 11 when feeding the thread 11 toward the needle 10, the thread tension for releasing the holding of the thread 11 by the thread tension adjusting member 25 b is used. A release mechanism (not shown; see the first embodiment) is provided. The thread sending mechanism 28 provided on the outer peripheral surface of the semicircular bottom plate 24 b of the thread adjusting mechanism 24 is for smoothly sending out the thread 11 toward the needle 10. An air nozzle () connected to a thread delivery pipe 28a for guiding the thread 11 above the threading device 7 and a high-pressure air source (not shown) for sending the thread 11 toward the threading device 7 by the high-pressure air flow. (Not shown; see the first embodiment).

The air nozzle is located at the threading position, that is, at the opening end of the air nozzle near the upper opening of the thread delivery pipe 28a located above the threading device 7, as in the first embodiment. The thread delivery tube 28 can be tilted except for the thread delivery tube 28a located above the threading device 7 and at the position where embroidery is performed.

In this case, at least the yarn delivery tube 28a at the position where the stab is performed is operated by an appropriate drive mechanism (not shown) so as to be raised. As soon as the embroidery is completed, the threading device 7 is tilted so that the threading device 7 can pinch the thread 11 hanging from the thread delivery pipe 28 a located above the adjacent threading device 7 accurately. desirable.

The thread selection mechanism 29 is selectively positioned above the threading device 7 for threading the thread delivery pipe 28 a of the thread delivery mechanism 28 corresponding to the required bobbin 21 to a predetermined needle 0. A spindle 29 a disposed on the sewing machine head 1 for movably mounting the thread adjusting mechanism 24 via its bottom plate 24 b, and a drive source (not shown) ) The driving body 29 b driven by the support shaft 29 a as a driving axis by a link 29 c connected to the shaft 29, and a through hole 24 formed in the bottom plate 24 b of the thread adjusting mechanism 24. and a pin 29 d protruding from the driving body 29 b for driving the thread adjusting mechanism 24 together with the driving body 29 b.

In this case, the drive is performed so that the thread delivery pipe 28 a of the thread delivery mechanism 28 corresponding to the required pobin 21 is accurately positioned above the threading device 7 for threading the predetermined needle 10. A positioning roller 29 h is arranged at the tip of a moving body 29 g that is driven by using a spindle 29 f as a driving axis by a link 29 e connected to a source (not shown). 29 h is fitted to a gear 24 d engraved on the periphery of the bottom plate 24 b of the thread adjustment mechanism 24 at an angle of the thread delivery tube 28 a of the thread delivery mechanism 28.

In this case, the thread selection mechanism 29 is controlled by the control unit of the sewing machine for the wheel, and the control unit stores in advance the type (color) of each bobbin 21 stored in the bobbin storage unit 22. In this way, a large number of color yarns can be automatically selected.

In addition, a thread insertion hole is provided at an appropriate position on the outer peripheral surface of the semicircular main body 24a of the thread adjusting mechanism 24 in order to hold the thread 11 from each bobbin 21 so as not to be entangled. Thread holders 20a, 20b, 20c and 20d formed at approximately equal intervals are provided. Is desirable.

Further, the thread tension adjusting mechanism 25 and the thread sending mechanism 28 constituting the thread adjusting mechanism 24 correspond to the number of the bobbins 21 that can be stored in the bobbin storing section 22 respectively. , Eight sets are provided on the outer peripheral surface of the semi-cylindrical body 24 a and the bottom plate 24 b of the thread adjusting mechanism 24, respectively, but the thread tension releasing mechanism, the thread length adjusting mechanism and the thread For the air nozzle 28 b of the delivery mechanism 28, etc., one SB is provided on the machine head〗 side, and one of these eight mechanisms at a predetermined position is operated or moved to the predetermined position. It should be shared with some, that is, shared by 18 sets of these mechanisms.

Also, the units 2A and 2B, which are constituted by equally dividing the bobbin storage section 22 and the thread adjusting mechanism 24 provided integrally with the bobbin storage section into right and left sides, preferably have the number of heads 1 of the sewing machine. Prepare multiple multiples of. Thus, when the color yarn is replaced, the unit 2A or the unit 2B can be replaced to shorten the time required for the replacement of the color yarn. For example, if the units 2A and 2B of this embodiment are prepared twice as many as the number of heads of the sewing machine, it is possible to exchange color threads of up to 36 colors in a short time. In this case, the type (color) of each of the pobbins 21 stored in the bobbin storage section 22 is stored in advance in the control section of the embroidery sewing machine, so that a large number of colors can be obtained simply by replacing the unit. The thread can be changed automatically.

Further, in this embodiment, the bobbin storage section 22 and the thread adjusting mechanism 24 provided integrally with the bobbin storage section 22 are formed as a unit, and this is detachably attached to the sewing machine head 1. However, these can be fixedly attached to the sewing machine head 1 as well.

In the present embodiment, the thread delivery tube 28 a of the thread delivery mechanism 28 corresponding to the required pobin 21 is placed above the threading device 7 for threading a predetermined needle 0. In order to position it selectively, the thread selecting mechanism 29 drives the thread adjusting mechanism 24 with the support shaft 29 a as the swing axis, but it slides in a horizontal plane as the thread selecting mechanism. A mechanism can also be employed.

As shown in FIGS. 14 to 24, a threading device 7 including a thread tensioning mechanism 3 and a threading mechanism 6 is provided below the thread supply device 2 of the sewing machine head 1. As shown in FIGS. 14 to 17, the thread tensioning mechanism 3 is configured to attach the end of the thread 11 suspended from the thread delivery pipe 28 a of the thread supply device 2 by a predetermined length to the needle 10. The thread guiding member 31 guides the thread to the adjacent position, a lever 132 provided with the thread clamping member 31 at the distal end, and a sliding piece 33 for movably supporting the base end of the lever 32. And a guide pipe 34 of a sliding piece 33 disposed substantially vertically in the thread tensioning mechanism body 30, and a belt 35 for raising and lowering the sliding piece 33 along the guide pipe 34. Combines with the pinion 3 2a fixed to the base end of the lever 1 32 to regulate the movement angle of the lever 32. The rack 36 arranged near the descending position of the sliding piece 33, and the lever 32 A guide groove 37 formed substantially vertically in the thread tensioning mechanism main body 30 for inserting the roller 3 2 b disposed at an intermediate position of the lever and restricting the rotation angle of the lever 32, and a belt 35 Drive mechanism 38 that drives the You.

In this way, the thread tensioning mechanism 3 is constituted by the movable lever 32, the sliding piece 33 moving up and down, and the like, so that the thread tensioning mechanism 3 can be made compact. The amount by which the member 31 protrudes forward of the sewing head 1 can be reduced.

The thread tensioning mechanism 3 drives the belt 35 to clamp the thread holding member 31 from the standby position substantially at the intermediate portion to the end of the thread 11 hanging from the thread delivery pipe 28a. When moving to the highest position, the bracket 1b that protrudes from the sewing head 1 can swing so that the thread clamp 3 挟 can automatically clamp the end of the thread 11. One member 3 1 e is arranged and a part of this The roller 3 1f arranged at the tip of the operating piece 3 1 d protruding from the movable holding piece 3 1 a of the thread holding member 3 1 abuts on the material 3 1 e to make the movable holding piece 3 1 a a spring member. By staking and releasing with the biasing force of 3 1c, the end of the thread 11 hanging from the thread delivery pipe 28a between the movable holding piece 31a and the fixed holding piece 31b is reduced. After passing through, the shoe member 3 1 e is moved by a drive mechanism (not shown) to release the contact between the shoe member 3 1 e and the operation piece 3 1 d, and the movable holding piece 3 1a is returned, and the yarn 11 inserted between the movable holding piece 31a and the fixed holding piece 31b is held.

Then, by driving the belt 35 in this state, the thread holding member 31 is moved from the highest position to the lowest position, and the thread 11 guided to the position near the needle 0 is moved to the position of the needle 10. After leading to the needle hole 10a and performing threading, the lower part of the thread tensioning mechanism main body 30 is released so that the end of the thread〗 1 held by the thread holding member 31 can be released. The operation member 3 1 g is movably disposed, and the operation member 3 1 g allows the roller disposed at the tip of the operation member 3 1 d protruding from the movable holding member 3 1 a of the thread holding member 3〗. By pressing the 3 f, the movable holding piece 31a is opened against the urging force of the spring member 31c.

In addition, the drive mechanism 38 is configured to selectively drive the rotation shaft 38a of the reverse belt 35 in both forward and reverse directions by a motor (not shown).

In addition, the thread tensioning mechanism 3 has an appropriate position in the elevating path of the sliding piece 3 3, for example, a standby position near the intermediate position of the thread clamping member 31, and the thread clamping member 31 moves from the thread delivery pipe 28 a to A limit switch (not shown) is provided at the highest position for holding the end of the hanging thread 11 and the lowest position for threading so that the position of the sliding piece 33 can be detected. To The position of the limit switch shall be able to be adjusted appropriately.

The position near the yarn delivery tube 28 a of the yarn supply device 2 and the needle 10 by the yarn tensioning mechanism 3 As shown in FIGS. 14 to 17, the thread 11 stretched between the balance 11 and the thread 11 is hung on the balance 41 and the auxiliary balance 42 of the balance mechanism 4.

In this embodiment, three sets of the balance mechanism 4 and the needles 10 corresponding to the balance mechanism 4 are provided, and the frame 1c provided with the needles 10 is moved in a horizontal plane. However, the number of sets of needles 10 provided on the frame 1c may be increased or decreased, or the frame 1c may be configured to slide in a horizontal plane.

The balance 41 has a threading hole 41a at the distal end and a cutout 41b into which the drive pin 41c of the balance 41 is inserted at the base end.

The sub-balance 42 has a ring-shaped thread hooking hole 42 a, a lever 42 b having a thread hooking hole 42 a at its tip, and a sliding piece 4 slidably supporting the lever 42 b. 2 c and a guide tube 4 2 d of a sliding piece 4 2 c arranged substantially vertically in the thread tensioning mechanism main body 30 and a sliding piece 4 2 c of the thread tensioning member of the thread tensioning machine model 3. 3 1 Magnet piece 4 2e to move up and down along guide pipe 34 in accordance with raising and lowering of thread holding member 3 1 as well as roller 4 2 arranged at the other end of lever 1 2 b f is in contact with the thread member 42g that regulates the position of the threading hole 42a, and the roller 42f arranged at the other end of the lever 42b is in contact with the thread member 42g. And 4 2 h.

The auxiliary balance 42 of the balance mechanism 4 drives the belt 35 of the thread tensioning mechanism 3 so that the thread clamping member 31 is suspended from the approximately middle standby position from the thread delivery pipe 28a. When the end of the thread 11 is moved to the highest position to hold the end, the sliding piece 4 2c is attracted to the thread holding member 3 1 and also moves to the highest position, and the thread delivery pipe is inserted into the thread hole 4 2a. The end of the thread 11 hanging from 28 a is passed through.

Then, the yarn 11 is held by the yarn holding member 3 1 located immediately below the yarn hooking hole 4 2a, and the belt 35 of the yarn tensioning mechanism 3 is driven in this state. The material 31 moves from the highest position to the lowest position. At this time, the sliding piece 42c is also adsorbed by the thread holding member 3 降下, and the sliding piece 42c also descends, but the sliding piece 42c is further dropped by the stopper member 42i provided substantially at the intermediate position. As a result, the suction with the thread holding member 31 is released, and it stops at this position, that is, the standby position at the bottom dead center. In addition, as the sliding piece 4 2c descends, the lever 4 2b with the thread hooking hole 4 2a through which the thread 11 is inserted is attached to the roller 4 2b at the other end. When f comes into contact with the shoe member 42g, it slides in the horizontal direction according to the shape of the shoe member 42g against the urging force of the spring member 42h. While the moving piece 4 2c descends, the thread 11 is passed through the thread hooking hole 41 a formed at the tip of the balance 41.

It is desirable to form a trap or the like in the thread hooking hole 41a of the balance 41 in order to prevent the hooked thread 11 from slipping out. As a result, the thread 11 is hung on the thread hooking hole 41a of the balance 41 and the thread hooking hole 42a of the sub-balance 42, and a sting is performed while being held in a required zigzag shape.

At the time of insertion, the balance 4 is reciprocally driven by the same drive mechanism as the conventional sewing machine for stimulating fiber, while the sub balance 42 is held at the standby position at the bottom dead center. As shown in FIGS. 18 to 21, the threading mechanism 6 pulls the thread 導か guided to a position near the needle 10 by the thread tensioning mechanism 3, and the needle hole 10 O of the needle 10. A thread is pulled through to a, and a thread pulling mechanism 6 により, a drive mechanism 62 of a thread pulling mechanism 61, and a thread 11 pinched by a thread pinching member 31 of a thread tensioning mechanism 3 are pulled out. The air nozzle 63 provided on the thread holding member 31 for feeding the yarn toward the pulling mechanism 61, and the thread 11 passed through the thread pulling mechanism 61 are more securely held by the thread pulling mechanism 61. And a thread pushing mechanism 64 disposed on the thread pulling mechanism 61 for the purpose. As shown in detail in FIGS. 19 to 21, the thread pulling-out mechanism 61 includes a hook member 61a having a hook-shaped tip and spacers 61a and 61b on both sides of the hook member 6a. 6 lb, 61b, a guide member disposed via the f, a holding member 61 for holding a tip member composed of a hook member 61a, a guide member 61b, 61b, and a spacer 61f, 61f. g.

The guide members 61b, 61b are curved outward so as to guide the hook member 61a to the center of the needle〗 0, that is, the position of the needle hole〗 0a when the guide member 61b abuts on the needle 10. At the base of the distal ends 61e, 61e, a leaf spring is formed so as to abut against the side surface of the hook member 61a, and a thread hole 61c is formed substantially at the center thereof. A thread escape groove 61 d is formed from c to the tip.

As shown in detail in FIG. 18, the drive mechanism 62 of the thread pull-out mechanism 61 is provided on a support 1 d erected on the side of the sewing machine head 1 that supports the holding member 61 g of the thread pull-out mechanism 61. And a drive lever 62b for driving the holding member 61g, and a drive mechanism 62c for the drive lever 62b. The thread pushing mechanism 64 is provided with a thread pushing piece 64a movably provided via a shaft 64c to a thread pulling mechanism 61 provided in the holding member 61g, and a direction for shielding the thread passing hole 61c, that is, A torsion spring 64b for urging the thread pressing piece 64a in a direction to push down the thread 11 along the side surface of the guide member 61b, and a thread pressing piece 64a piled on the urging force of the torsion spring 64b. And the operation pieces 64 d and 64 e of the thread pressing piece 64 a formed on the frame 62 a of the driving mechanism 62 to hold the thread insertion hole 61 c open. Consists of Then, as shown in FIG. 18 (a), the threading mechanism 6 pushes the distal end of the driving lever 62b forward by the driving mechanism 62c, thereby forming the proximal end of the driving lever 62b. 61 g of the holding member inserted in the long hole 62 d By pushing down the fixed pin 61 and lowering the pin 61h along the groove 62e formed in the frame 62a, the pull-out mechanism 6〗 is lowered via the holding member 61g to which the pin 61h is fixed.

In this state, by pushing the tip of the drive lever 62b further forward by the drive mechanism 62c, the pivot 62g of the drive lever 62b is advanced along the groove 62e formed in the frame 62a, and the drive By moving the pin 61h fixed to the holding member 61g inserted in the long hole 62d formed in the base end side of the lever 62b forwardly along the groove 62h formed in the frame 62a, the pin 6 Advance the pull-out mechanism 61 via the holding member 61 g to which 1 h is fixed. In this manner, the drive mechanism 62 drives the drive lever 62b by the drive mechanism 62c to lower and advance the thread pull-out mechanism 61, and guides the tip end of the hook member 61a while guiding it with the guide member 61b. Into the needle hole 1 Oa.

By the way, when the thread pulling-out mechanism 61 is lowered and advanced, the operation pieces 64 d and 64 e of the thread pressing piece 64 a formed on the thread pressing piece 64 a and the frame 62 a of the driving mechanism 62 respectively come into contact with each other, and the screw is twisted. The thread pressing piece 64a can be pushed up against the urging force of the spring 64b to hold the thread 6 through hole 6c open.

In this state, the yarn 11 held by the yarn holding member 3 of the yarn tensioning mechanism 3 is sent from the air nozzle 63 provided on the yarn holding member 31 to the high-pressure air toward the yarn pulling-out mechanism 61. This allows the thread to pass through the thread insertion hole 61c of the guide member 61b, and releases the end of the thread 1 held by the thread clamping member 31.

Thereafter, the drive lever 62b is driven again by the drive mechanism 62c to retreat the thread pull-out mechanism 61, and the thread pressing piece 64a and the drive mechanism 6 The contact between the operation pieces 64d and 64e of the thread pressing piece 64a formed on the second frame 62a is released, and the thread pressing piece 64a is moved in a direction to shield the thread insertion hole 61c. By pushing down both ends of the thread 11 passed through the thread insertion hole 61 c along the side surface of the guide member 6 1 b, the thread〗 1 inserted through the thread insertion hole 61 c is pulled by the hook of the thread pull-out mechanism 61. The drive operation of the drive lever 62b of the drive mechanism 62 is succeeded while being accurately hooked on the member 61a. As a result, the thread pulling mechanism 61 is retracted, and the thread 11 is hooked on the hook member 61a having a hook-shaped tip, while the hook member 61a is pulled out from the needle hole 1 Oa. Perform threading.

By the way, in the embroidery sewing machine according to the present embodiment, after performing threading, the thread selecting mechanism 29 of the thread supply device 2 is driven as shown in FIGS. 11 While the 1 is laid, move the thread delivery pipe 28a to the next side (right side) to perform embroidery.

An auxiliary mechanism 5 including an upper thread clamp mechanism 51, a thread cutting mechanism 52, and a cut thread recovery mechanism 53 is disposed on the path around which the thread 11 is looped. The upper thread clamp mechanism 51 is for temporarily clamping the thread 11 in order to prevent the new thread 11 from being unreeled from the bobbin 21 when cutting and collecting the thread〗 1. As shown in FIG. 4, a fixed holding piece 5 片 a fixed to the sewing machine head 1 side and a movable holding piece 51b for clamping the thread 11 between the fixed holding piece 51a, It comprises a driving mechanism 51c for the movable holding piece 51b.

The thread cutting mechanism 52 is for cutting the thread 11 when exchanging the thread 1 and the like, and as shown in FIG. 22, a fixed blade 52a fixed to the sewing machine 1 side, It is composed of a movable blade 52c that moves around the pivot 52b, and a driving mechanism 52d for the movable blade 52c. The cut thread collecting mechanism 53 is for collecting the thread 11 that has been cut by the thread cutting mechanism 52 when the thread 11 is replaced, etc., as shown in FIG. 23. The operating rod 53c formed with a hook 53b that hooks the thread 111 to the operating rod 53d, the driving mechanism 53d of the operating rod 53c, and the operating rod 53c are slidably passed through. A suction pipe 53 e for drawing in and collecting the cut thread 11, high-pressure air introduction pipes 53 f and 53 g for generating suction force in the suction pipe 53 e, and a main body of the collection mechanism 53 and a collecting container 53 h formed of a net for storing the collected yarn 11 detachably mounted on a.

Further, the sewing machine head 1 is provided with a cover body 8 as shown in FIG.

In the cover body 8, when the thread delivery tube 28a is moved to the embroidery position on the side (right side) by one step while the thread 11 is stretched, the thread 11 1 Provide the lower thread clamp mechanism 8 クランプ that clamps 1 センサ and the sensor 1 2 2 that detects the state of thread 11 1.

At the start of embroidery, the lower thread clamp mechanism 81 prevents the lower thread clamp mechanism 8 from feeding out the thread 1 の that is 8 mm or less, and prevents the end of the thread〗 1 from coming out on the surface of the sewn cloth. This is for temporarily clamping the thread 11 to prevent it.The thread 11 is fixed between the fixed holding piece 8 1a fixed to the machine head 1 side and the fixed holding piece 8 1a. It is composed of a movable holding piece 8〗 b to be clamped and a driving mechanism 8 1c of the movable holding piece 8 1b.

The sensor 8 2 that detects the state of the thread 11 1 optically detects the return of the thread 11, and stops the fiber when the return of the thread 11 occurs. 1 to prevent the occurrence of defective products. As shown in Fig. 24, the light emitting and receiving element 82a, the light emitting and receiving element 82a and the yarn 1 And mirrors 8 2 b opposed to each other. FIGS. 25 to 32 show a second embodiment of the thread supply device 2 arranged above the sewing machine head 1 of the staple fiber sewing machine.

This yarn supply device 2 is provided in correspondence with the number of bobbins 21 that can be stored, which is provided integrally with the bobbin storage portion 22 and the bobbin storage portion 22 that can store a plurality of color yarn pobbins 21. A thread adjusting mechanism 25 having a flat rectangular main body 24a including a thread tension adjusting mechanism 25, a thread length adjusting mechanism 27 for holding the thread 11 to be sent out toward the needle 10 for a predetermined length, and a thread sending mechanism 28. 24, and a thread selecting machine 29 for selectively positioning a thread sending mechanism 28 corresponding to a required bobbin 21 above a threading device 7 for threading a predetermined needle 10.

In this case, the number of the pobins 21 that can be stored in the bobbin storage section 22 and the number of the thread tension adjustment mechanisms 25 do not necessarily have to match, and the number of the bobbin storage sections 22 is smaller than the number of the thread tension adjustment mechanisms 25. By increasing the number of bobbins 21 that can be stored, it is possible to change the number of the bobbins 2 掛け for threading the thread tension adjusting mechanism 25.

The pobin storage section 22 stores, for example, a total of 28 bobbins 21 of 4 × 7. The bobbin storage section 22 has a spindle 22a for inserting and supporting the pobin 21 and a spindle 22a. A pobin guide (not shown) suitable for the pobin 21 to be used is provided around the periphery of the container, and a filter 22c for pulling out the thread 11 of each pobin 21 so as not to be entangled is laid on the bottom surface.

A thread holder 23 is provided on the spindle 22a, and a total of 28 threads 11 are pulled out from the thread holder 23 at intervals, and the thread of the thread adjusting mechanism 24 is integrally attached to the lower part of the pobin storage section 22. Feed it into the tension adjustment mechanism 25. Eight of the 28 yarns 11 are held by the yarn holding body 23. The yarn holder 23 is made up of a ceramic guide tube (not shown) provided at the upper end opening of the spindle 22a, a hollow conduit of the spindle 22a, and a pipe member communicating with the hollow conduit. 23 s and a ceramic guide tube 23 t disposed at the end opening of the pipe member 23 s, and the yarn 11 of each bobbin 21 is a hollow tube of a spindle 22 a It is fed into the thread tension adjusting mechanism 25 through the passage and the pipe member 23 s.

The work of inserting the yarn 11 into the hollow conduit of the spindle 22a and the pipe member 23s is easily performed by blowing a high-pressure airflow together with the yarn 1 from the upper end opening of the guide tube 23q. Can be done.

By the way, in the present embodiment, the pobin housing section 22 is fixed to the sewing machine head 1 and disposed. However, the present invention is not limited to this, and the modified examples shown in FIGS. As shown in the figure, the pobin storage section 22 is divided into two equal parts on the left and right sides to form a unit, and this is detachably attached to the upper part of the flat rectangular body 24 a of the thread adjustment mechanism 24. Can be

The bobbin storage section 22 stores, for example, a total of 20 bobbins 2 1 on the left and right, with a total of 10 pieces of 2 × 5 bobbins 2 1. In addition to erecting the spindle 2 2a for inserting and supporting 1, a pobin guide (not shown) suitable for the bobbin 21 to be used is installed around the spindle 22 a, and the thread of each pobin 2〗 Lay out the filter 2 2 c to pull out the 1 1 without tangling.

Then, the storage table 2 2 d on which the spindle 22 a is erected is attached to the guide rail 22 i formed on the upper part of the main body 24 a of the thread adjusting mechanism 24 so as to be removably attached. To

In this case, the pipe member holding member 23 u fixed to the opening of the distal end of the pipe member 23 s communicating with the hollow conduit of the spindle 22 a When detaching d, the support shaft 22f is erected on the storage platform 22d.When mounting the storage platform 22d, the support shaft is erected on the upper part of the main body 24a of the thread adjusting mechanism 24. 22 g so that it can be selectively arranged.

In addition, in front of the guide rail 22i, when the storage base 22d is mounted on the guide rail 22i, the storage base 22d is temporarily placed, and the storage base 22d is smoothly moved along the guide rail 22i. A pipe section for fixing the storage base support 22d to enable sliding, supporting the pipe member 23s, adjusting the amount of droop of the noise member 23s, and preventing entanglement. Material support frame 22h is slidably provided.

In addition, it is preferable that a plurality of storage stands 22 d of the pobin storage section 22 be prepared in plural times of the number of heads of the sewing machine 1. Thus, when the color thread is replaced, the storage stand 22d is replaced, and the time required for the color thread replacement can be reduced. For example, if the number of storage stands 22d of the pobin storage section 22 of the present modified example is twice the number of heads of the sewing machine, color threads of up to 40 colors can be exchanged in a short time. In this case, by storing in advance the type (color) of each bobbin 21 stored in the storage table 22d of the pobin storage section 22 in the control unit of the embroidery sewing machine, it is possible to perform a large number of operations simply by replacing the storage table 22d. The color yarn can be changed automatically.

In this modification, the storage table 22d is detachably mounted by sliding the storage table 22d on a guide rail 22i formed above the main body 24a of the thread adjusting mechanism 24. It can also be detachably mounted by placing it on the upper part of the main body 24a of the thread adjusting mechanism 24.The number of divisions of the pobin storage section 22 is not limited to two, but may be three or more. You can also.

By the way, in the second embodiment, the yarn tension adjusting mechanism 25 is a yarn adjusting machine. It has two thread tension adjusting members 25b and 25c for each thread 11 from each bobbin 21 provided on the outer surface of the flat rectangular body 24a of the structure 24.

One of the yarn tension adjusting members 25c is provided with a tension sensor 25d for measuring the tension of the yarn 11 so that a yarn breakage of the yarn 11 can be detected.

The signal from the tension sensor 25d is converted into an electric signal from an electric contact 25e disposed on the thread adjusting mechanism 24 to an electric circuit having an electric contact 25f disposed on the sewing machine head 1. 25 Indicator light that is sent to the sewing machine control unit via 5 g to control the drive of the sewing machine for sewing and to display the status of the upper thread and lower thread arranged on the sewing machine head 1 etc. Light up (not shown) to inform the operator of thread breakage of thread # 1.

In addition to the display lamp, a display device such as a liquid crystal display panel for displaying the status of the propulsion sewing machine to the operator and an alarm device such as a buzzer can be provided at an appropriate position on the sewing machine for the stab .

Also, in order to prevent a large resistance from being applied to the thread 11 when sending the thread〗 1 toward the needle〗 0, the thread tension for releasing the holding of the thread 11 by the thread tension adjusting member 25b is used. A release mechanism 26 is provided (for details, see the thread tension release mechanism 26 of the first embodiment).

In addition, the sewing head 1 near the main body 24a of the thread adjusting mechanism 24 has a magnitude of the tension of the thread 11 applied by the two thread tension adjusting members 25b and 25c. A thread tension adjuster 25h for adjusting the thread length is provided.

This thread tension adjuster 25 h has a tension equivalent to the tension applied to the thread 11 via the balance 41, the sub-balance 42, the needle 10, etc., which is located below the thread supply device 2 described later. Can be applied to the thread 11, and the two thread tension adjusting members 2 5 b, 2 can be attached without hanging the thread 11 on the balance 41, the auxiliary balance 42, the needle〗 0, etc. 5c Uniform tension of thread 1 1 from each pobin 2 1 applied by c To be able to adjust. The thread tension adjusting device 25h has a magnet disposed at a base thereof, and a thread 11 from each of the pobins 21 is directed to an appropriate position of the sewing machine head〗, more specifically, to the needle 10. The yarn feeding mechanism 28 provided for feeding can be selectively detachably installed at a position below the yarn sending pipe 28a.

A thread delivery mechanism 28 provided on the outer surface of the flat rectangular main body 24a of the thread adjusting mechanism 24 is for smoothly sending out the thread〗 1 toward the needle〗 0, and a threading device for passing the thread 11 1 A high-pressure air supply pipe 28f connected to a high-pressure air source (not shown), and air for feeding the yarn 11 toward the threading device 7 by the high-pressure air flow. Nozzle 28b.

The air nozzle 28b is fixed so that the opening end of the air nozzle 28b is located near the upper opening of the thread delivery pipe 28a, and the thread delivery pipe 28 located above the threading device 7 and at a position where embroidery is performed. The high-pressure air supply pipe 28f is slidably provided so that low-pressure air can be supplied from the high-pressure air supply pipe 28f to the air nozzle 28b of a.

The high-pressure air supply pipe 28f and the air nozzle 28b are inserted into the high-pressure air supply pipe 28f by sliding the high-pressure air supply pipe 28f, as shown in this embodiment. The high-pressure air supply pipe 28f and the air nozzle 28b are hermetically connected by a seal member provided at the open end of the air nozzle 28b. Can be configured.

The thread selection mechanism 29 selectively positions the thread delivery pipe 28a of the thread delivery mechanism 28 corresponding to the required pobin 21 above the threading device 7 for threading a predetermined needle # 0. The thread adjusting mechanism 24 is attached to the sliding shaft 29 i provided on the sewing machine head 1 slidably in the horizontal plane together with the pobin storage section 22. In addition, the main bodies 24a of the adjacent yarn adjusting mechanisms 24 are connected to each other by connecting members 24e, and all of the main bodies 24 of the yarn adjusting mechanisms 24 are moved along the sliding shafts 29i by a driving source (not shown). a is slid in conjunction with each other to accurately position the thread delivery tube 28a of the thread delivery mechanism 28 corresponding to the required pobin 21 above the threading device 7 for threading a predetermined needle # 0. It is configured to be able to.

In this case, the thread selecting mechanism 29 is controlled by the control unit of the stimulating sewing machine, and the type (color) of each bobbin 21 stored in the bobbin storage unit 22 is stored in the control unit in advance. Enables automatic selection of multiple color threads.

The configuration of the thread length adjusting mechanism 27 and the like provided below the thread tension adjusting mechanism 25 is the same as that of the first embodiment.

Next, FIG. 33 shows a second embodiment of a threading device 7 including a thread tensioning mechanism 3 and a threading mechanism 6 disposed below the thread supply device 2 of the sewing machine head 1 of the stimulating sewing machine. To Figure 40.

As shown in FIGS. 33 to 34, the thread tensioning mechanism 3 moves the end of the thread 1 垂 suspended from the thread delivery pipe 28 a of the thread supply device 2 by a predetermined length to a position near the needle 10. A thread holding member 31; a lever 32 provided with the thread holding member 31 at the distal end; a sliding piece 33 for supporting the base end of the lever 32; and a belt 35 for moving the sliding piece 33 up and down. The guide groove 37 formed in the thread tensioning mechanism main body 30 that regulates the rotation angle of the lever 32 by inserting the roller 32b disposed at the intermediate position of the lever 32, and the belt 35 are driven. And a driving mechanism 38 that drives the motor.

In this way, the thread tensioning mechanism 3 is made up of the lever 32, the sliding piece 33 that moves up and down, and the like, so that the thread tensioning mechanism 3 can be made compact. The amount of head 1 projecting forward can be reduced. Cut.

By driving the belt 35, the thread tensioning mechanism 3 moves the thread holding member 31 from a substantially intermediate standby position (the sliding piece 33 to the position of the position sensor 39c). 1 through the open position (sliding piece 33 at the position of the position sensor 39 b), the highest position (sliding piece) that clamps the end of the thread 1 1 hanging from the thread sending pipe 28a. When the 3 3 is moved to the position sensor 39 a), a threaded bracket is provided on the sewing machine head so that the thread clamping member 31 can automatically clamp the end of the thread 1〗. A roller member is provided so as to be able to move freely, and a roller 31 f arranged at the tip of an operation piece protruding from the movable holding piece of the thread holding member 31 abuts on this member, and is movable. By releasing the holding piece 3 1a against the urging force of the spring member, the holding piece 3 1a is suspended from the thread feeding tube 28a between the movable holding piece 31a and the fixed holding piece 31b. After passing through the end of the thread, the shoe member is moved by the drive mechanism, the contact between the shoe member and the operation piece is released, and the movable holding piece 3 1a is returned. The thread 11 inserted between the movable holding piece 31a and the fixed holding piece 31b is held (similar to the first embodiment). Then, by driving the belt 35 in this state, the thread holding member 31 is moved from the highest position (the sliding piece 33 to the position of the position sensor 39a) to the lowest position (the sliding piece 33). To the position sensor 3 9 d), guide the thread〗 1 guided to the position near the needle 10 into the needle hole 1 O a of the needle〗 0, thread the thread, and then An operating member is provided at the lower part of the thread tensioning mechanism main body 30 so as to be capable of releasing the end of the thread pinched by the thread pin 1 by the operating member. 3 Press the roller 3 f arranged at the tip of the operation piece protruding from the movable holding piece 3 1 a to push the movable holding piece 3 1 a to the biasing force of the spring member and open it. (Similar to the first embodiment). The drive mechanism 38 is driven by a motor (not shown) to rotate the belt 35. 38 a is configured to be selectively driven in both forward and reverse directions.

Also, the arrangement positions of the position sensors 39, 39b, 39c, and 39d should be adjusted appropriately.

As a mechanism for supplying high-pressure air to the air nozzle 63 provided on the yarn holding member 3〗, the air nozzle 63 is directly connected to a high-pressure air source (not shown) via a high-pressure air supply pipe. In addition to the connection, when the thread clamp member 31 moves to the lowest position (the sliding piece 33 moves to the position sensor 39d), the air nozzle 63 and the high-pressure air supply pipe As shown in FIG. 34, the air nozzle 63 and the high-pressure air supply pipe 63 a are sealed by a sealing member provided at the open end of the high-pressure air supply pipe 63 a. The air supply pipes 63a and may be configured to be connected in a sealed manner.

By the way, in the present embodiment, the opening / closing operation of the thread clamping member 31 of the thread tensioning mechanism 3 is performed by a single member and an operating member disposed at the upper and lower portions of the thread tensioning mechanism main body 30. However, the present invention is not limited to this, and as shown in a modified example shown in FIGS. 35 to 36, in the direction in which the thread holding member 31 is closed between the movable holding piece 31a and the fixed holding piece 31b. A biasing torsion spring 3 1 j is provided to constitute the thread holding member 3 1, and the opening and closing operation of the thread holding member 3 1 is appropriately performed at the upper and lower portions of the thread tension mechanism main body 30. It can be configured to be performed by the member 31h and its driving mechanism 31i.

The thread 11, which is stretched between the thread delivery pipe 28 a of the thread supply device 2 and the position near the needle 10 by the thread tension mechanism 3, balances the balance 41 and the sub-balance 4 of the balance mechanism 4. Hang on two.

In this embodiment, three sets of the balance mechanism 4 and the needles 10 corresponding to the balance mechanism 4 are arranged, and the frame〗 c provided with the needles 10 is moved in a horizontal plane. However, the number of sets of needles 10 provided on frame 1 c has been increased. It can also be configured to reduce or slide the frame〗 C in a horizontal plane.

The balance 41 has a threading hole 41a at the distal end and a cutout 41b into which the drive pin 41c of the balance 4 is inserted at the base end.

The auxiliary ceiling 42 has a ring-shaped thread hooking hole 42a, a lever 42b disposed at the end of the threading hole 42a, and a sliding piece slidably supporting the lever 42b. 4 2c and the guide tube 4 2d of the sliding piece 4 2c, which is installed in the thread tension mechanism main body 30 in a substantially vertical direction SB, and the sliding piece 4 2c clamps the thread of the thread tension mechanism 3. A magnet piece 4 2 e for adsorbing on the member 3 1 and moving up and down along the guide tube 34 in accordance with the raising and lowering of the thread holding member 3 1, and a roller 4 2 disposed at the other end of the lever 4 2 b f and the roller 42g arranged at the other end of the lever 42b to regulate the position of the threading hole 42a, and the roller 42f arranged at the other end of the lever 42b to contact the shoe member 42g. And 4 2 h.

As a result, the yarn 1 is hung on the yarn hooking hole 41 a of the balance 41 and the yarn hooking hole 42 a of the sub-balance 42, and the stimulating fiber is held while being held in a required zigzag shape.

Then, at the time of embroidering, the balance 41 is reciprocated by the same drive mechanism as the conventional sewn sewing machine, while the sub balance 42 is held at the standby position at the bottom dead center. The configuration and operation are the same as in the first embodiment.

The basic structure of the threading mechanism 6 is the same as that of the first embodiment. Among them, the thread pushing mechanism 64 has a shaft 64 c attached to the thread pulling mechanism 61 as shown in FIG. The tip 6 4 f of the thread pressing piece 6 4 a movably arranged through the hook is formed into a hook shape, and the thread 11 hooked on the hook member 6 1 a does not come off the hook member 6 1 a Like that.

By the way, in the present embodiment, the thread pulling-out mechanism 61 of the threading mechanism 6 The thread pressing mechanism 64 is used to ensure that the thread 11 is hooked on the hook member 61a. However, the thread pressing mechanism 64 is not limited to this, and as in the modification shown in FIG. Air nozzles 65a and 65b are arranged on the side of the guide members 61b and 61b of the extraction mechanism 61, and high-pressure air is discharged downward from the air nozzles 65a and 65b. By doing so, both sides of the thread 11 inserted into the thread insertion hole 6〗 c of the thread pulling-out mechanism 61 can be configured to be pushed down.

Then, in the embroidery sewing machine of the present embodiment, similarly to the embroidery sewing machine of the above-described first embodiment, after performing threading, the thread selection mechanism 29 of the thread supply device 2 is driven, so that the thread 1 Move the thread delivery tube 28a to the right side of step 右側 with embroidered so that embroidery is performed.

An auxiliary mechanism including an upper thread clamping mechanism, a thread cutting mechanism, and a cut thread collecting mechanism 53 is provided on the path around which the thread 11 is wound.

Among these, the cut yarn collecting mechanism 53 is for collecting the yarn 11 cut by the yarn cutting mechanism when the yarn # 1 is replaced, etc., and is shown in FIG. 39 to FIG. 40. As shown in the figure, the operating rod 53c formed with the hook 53b hooking the thread 111 at the end, the driving mechanism 53d of the operating rod 53c, and the operating rod 53c are slidably inserted. And suction pipes 5 3 e, 5 3 i for drawing in and collecting the cut yarn 11 and suction pipes 5 3 e, 5 3 i, 5 3 j for generating suction force or sending power. The high-pressure air inlet pipes 53 f and 53 and the suction container 53 3 formed of a mesh that is detachably attached to the tip of the suction pipe 53 j and that stores the collected yarn 1 h, and a drive mechanism 53 k for swinging the recovery mechanism body 53 a between the standby position and the recovery position of the yarn 11 around the drive shaft 53 m. Embroidery sewing machine smell of this embodiment In the same manner as in the first embodiment, a cover is provided on the sewing machine head 1, and the thread sending pipe 28 a is provided with the thread 掛け 1 laid over the cover body. The embroidery position on the side (right side) A lower thread clamp mechanism for clamping the thread 11 and a sensor for detecting the state of the thread # 1 are provided in the path where the thread 11 is passed when the thread is moved to the position.

Next, an operation method of the embroidery sewing machine according to the present embodiment (first and second embodiments) will be described.

First, the operation method at the stage prior to the provocation will be described.

At the start of embroidering, the bobbins 21 of the respective color threads are stored in the bobbin storage sections 22 of the thread supply device 2 which is disposed above or separately from the sewing head 1 of the embroidery sewing machine. The yarn 11 pulled out from 21 is passed over the yarn tension adjusting mechanism 24 via the yarn holder 23, and the end of the yarn 11 is hung from the yarn delivery pipe 28a by a predetermined length.

Next, a description will be given of an operation method for starting the sashimi.

By driving the yarn supply mechanism 2 over which the yarn 1 掛け has been wound and the yarn selection mechanism 29, the thread is fed through the yarn delivery pipe 28 a of the yarn delivery mechanism 28 corresponding to the required bobbin 2〗 It is selectively and accurately positioned above the threading device 7. Thereafter, the belt 35 of the yarn tensioning mechanism 3 is driven while sending high-pressure air from the air nozzle 28 b into the yarn delivery pipe 28 a, thereby moving the yarn clamping member 31 near the intermediate position. Is moved from the standby position to the highest position 嚣 for holding the end of the thread 1 垂 hanging from the thread delivery pipe 28 a, and the end of the thread 11 is held by the thread holding member 31.

Then, the yarn length adjusting piece 27 c of the yarn length adjusting mechanism 27 is advanced while the resistance of the yarn tension adjusting mechanism 25 is not applied to the yarn 11 by the yarn tension releasing mechanism 26. While holding the weft thread〗 1 for a predetermined length, the belt 35 of the thread tensioning mechanism 3 is driven to lower the thread holding member 31, and the end of the thread 11 is moved to the threading position. So that it leads to a position near a certain needle 10. I do.

At this time, the thread〗 1 stretched between the thread delivery pipe 28 a and the position near the needle 10 at the threading position by the thread tensioning mechanism 3 is attached to the balance 4 1 and the sub-balance of the balance machine 4. Multiplied by 4 2

Thereafter, by releasing the thread tension release mechanism 26, the thread 1 が is lowered and advanced in advance in a state where the resistance is applied to the thread 1 による by the thread tension adjustment mechanism 25, whereby the tip of the rehook member 6 1a is advanced. Is inserted between the needle hole 10a of the needle 10 and the thread insertion hole 6 1c of the guide member 6 1b of the thread pull-out mechanism 61 which is inserted by the thread pinching member 3 a of the thread tensioning mechanism 3. The thread 11 is inserted by sending high-pressure air from the air nozzle 63 provided on the thread holding member 3〗 to the thread pull-out mechanism 61, and the thread-length adjusting piece of the thread-length adjusting mechanism 27 is used. By retracting 27 c, the held thread 11 can be sent out, the pinching of the thread〗 1 by the thread pinching member 31 is released, and the required length held by the thread length adjustment mechanism 27 The thread 11 is inserted into the thread insertion hole 6 1c of the guide member 6 1b of the thread pull-out mechanism 61.

Then, after stopping the supply of the high-pressure air from the air nozzle 63, the thread pulling-out mechanism 61 is moved backward, and the thread pressing piece 64a is moved in a direction to shield the thread insertion hole 6c. By pushing down both ends of the thread 1 inserted into the insertion hole 6 1c along the side surface of the guide member 6 1b, the thread 11 passed through the thread insertion hole 6 1c is hooked by the thread pull-out mechanism 61. The thread pulling mechanism 61 is retracted while accurately hooking the member 61a, and the threading is performed by pulling out the hook member 61a from the needle hole 10a.

In this case, by driving the yarn selection mechanism 29 of the yarn supply device 2 at an appropriate time, the yarn delivery pipe 28a is moved one step side (right side) in a state where the yarn 11 is stretched. To do it. Thereafter, by driving the belt 35 of the thread tensioning mechanism 3, the thread pinching member 31 is returned to the standby position near the intermediate position, and stimulation is started.

At the start of embroidery, the lower thread clamp mechanism 81 temporarily clamps thread 11 to prevent unwinding of thread 81 below the lower thread clamp mechanism 81 and the end of thread 11 To prevent it from coming to the surface of the cloth.

After that, release the clamp of thread 11 by the lower thread clamp mechanism 8〗 and perform embroidery.

When replacing the thread 11, the upper thread clamp mechanism 51 clamps the thread 11, preventing the new thread from being unwound from the pobin 21, and operating the cutting thread collection mechanism 53. The thread 11 is hooked on the hook 5 3b formed at the tip of 53 c, and the thread 11 is cut one after the other at the lower part of the needle plate and the thread cutting mechanism 52, and the cut thread 11 is removed. The cut yarn is collected in the collection container 53 h via the suction pipe 53 e of the cut thread collection mechanism 53.

Hereinafter, in the same manner, the steps of threading and knitting are repeated. Industrial applicability

ADVANTAGE OF THE INVENTION According to the thread supply device in the embroidery sewing machine of the present invention, processing such as replacement of a colored thread or when a thread breaks can be automatically performed without manual intervention, and the time required for the processing itself is reduced. Since the working time and the productivity of the sewing machine can be improved, it can be suitably used particularly for an embroidery sewing machine in which a large number of color threads are frequently replaced.

Claims

The scope of the claims

1. It corresponds to the number of bobbins that can be stored, and the pobin storage section that can store a plurality of bobbins, which is provided above the sewing machine head of the embroidery sewing machine. And a thread adjusting mechanism provided with a thread tension adjusting mechanism and a thread sending mechanism, and a thread selecting mechanism for selectively positioning a thread sending mechanism corresponding to a required bobbin above a threading device for threading a predetermined needle. A thread supply device for an embroidery sewing machine, comprising a mechanism.

2. The thread supply device for an embroidery sewing machine according to claim 1, wherein the bobbin housing portion is unitized and detachably attached to the sewing machine head.

3. The thread supply device for an embroidery sewing machine according to claim 2, wherein the bobbin housing portion is formed by being divided.

4. The thread supply device for an embroidery sewing machine according to claim 1, wherein the main body of the thread adjusting mechanism is formed in a semi-cylindrical shape, and the thread selecting mechanism is constituted by an automatic mechanism.

5. Form the main body of the thread adjusting mechanism into a rectangular shape in a plane, and use the thread selecting machine

4. The thread supply device for an embroidery sewing machine according to claim 2, wherein the thread supply device is configured with a frame.

6. The thread supply device in a sewing machine according to claim 2, wherein the main body of the thread adjusting mechanism is formed by being divided.