JP2002325988A - Thread cassette and sewing machine equipped with the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a thread cassette and a sewing machine equipped with the same capable of easily dealing with sewing such as twin-needle sewing and the like by enabling the cassette body to guide therein together with threads reeled out from a thread reel provided therein and the other thread reel prepared separately therefrom at the same time. SOLUTION: The cassette body 33 of a thread cassette 44, which is detachably attached to the cassette mounting portion 5 of a sewing machine body, comprises a thread path 30 serving as a simultaneous thread supply path for introducing and guiding together a needle thread T1 reeled out from an inner thread reel 26 in the thread reel container 27 thereof and a needle thread T2 reeled out from an outer thread reel 71 held by a thread reel holding member 72.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a thread cassette detachably mounted on a sewing machine main body and a sewing machine provided with the thread cassette.

[0002]

2. Description of the Related Art Conventionally, a thread cassette of this kind or a sewing machine provided with the thread cassette is disclosed in, for example,
No. 1693 discloses a technique of a cassette type thread passing device of a sewing machine. This cassette type thread passing device is provided with a cassette mounting portion provided in a balance moving region of an arm portion of a sewing machine and a right region thereof, and a cover body for opening and closing the cassette mounting portion, and attaching and detaching an upper thread cassette to and from the cover body. . A thread tensioner and a thread take-up spring protrude from the cassette mounting portion,
A balance moving space exists at the left end of the cassette mounting portion.
The upper thread cassette has a thread spool accommodating portion, a pair of legs, and the like. The upper thread drawn from the center of the thread spool is extended between the pair of legs to form a free span. Then, the cover body is turned forward by 90 degrees and opened, and the upper thread cassette is set on the cover body, and then the cover body is closed. During the closing operation of closing the cover with the balance at the lowermost position, the free span of the upper thread cassette is automatically hooked to the thread tensioner and the thread take-up spring. Thereafter, when the balance is raised, the upper thread is automatically hooked on the thread hooking portion of the balance. When the cover is closed, the axis of the thread spool is oriented horizontally and in the front-rear direction.

In this state, when sewing is started, the upper thread is sequentially drawn out from the thread spool and consumed. Then, immediately before the thread of the thread spool runs out, stop the sewing machine,
The operator opens the cover body and removes the upper thread cassette, and replaces the upper thread cassette with another upper thread cassette, or removes the thread spool from the upper thread cassette and uses a thread winding device or the like for the thread spool. The upper thread is wound and the thread spool is set again in the thread spool accommodating portion of the upper thread cassette so as to cope with sewing.

[0004] Further, the upper thread unwound from a normal thread spool provided on the upper right side of the arm portion of the sewing machine,
The cover body can be used similarly to the thread of the thread spool of the upper thread cassette. That is, in this case, the cover body substantially corresponds to the position where the free span is formed by the upper thread of the upper thread cassette,
A pair of groove-shaped thread guides for guiding the upper thread of the thread spool in a straight line is provided, and when using the upper thread of the thread spool, an upper thread cassette is set on the cover body. The upper thread cassette blocks the upper thread guide path of the thread spool, so that the upper thread cassette is removed from the cover body in advance, and in this state, the upper thread cassette fed out of the thread spool is removed. The thread is wound around the pair of groove-shaped thread guide portions of the cover body, and the cover body is closed so that the thread is involved in the balance or the like in the same manner as the upper thread of the thread spool of the upper thread cassette. I have to.

[0005]

According to the prior art, when the upper thread of the thread spool is used from the state where the upper thread of the thread spool of the upper thread cassette is used, as described above, When the upper thread cassette is set in the cover body, the upper thread cassette blocks the upper thread guide path of the thread spool, so that the operation of removing the upper thread cassette from the cover body is performed. If this operation is neglected, the upper thread of the thread spool cannot be passed over the pair of groove-shaped thread guide portions of the cover body.

In addition, the cassette type threading device is, for example, 2
When it is attempted to apply the present invention to a main needle sewing machine, it is impossible to simultaneously guide and guide the upper thread of the upper thread cassette and the upper thread of the thread spool by the cover body, as is apparent from the above configuration. Therefore, this two-needle sewing cannot be dealt with at all.

However, according to the present invention, it is possible to simultaneously guide a plurality of yarns respectively unreeled from a spool on the cassette body and another spool provided separately from the spool in the cassette body. It is an object of the present invention to provide a thread cassette and a sewing machine provided with the thread cassette, which can easily cope with sewing such as double needle stitching.

[0008]

According to a first aspect of the present invention, there is provided a thread cassette in which a cassette body is detachably mounted to a sewing machine body, and the cassette body is attached to the cassette body. In a thread cassette for holding a thread spool wound with a thread to be supplied to a sewing section, a plurality of reels unwound from the thread spool and another thread spool prepared separately from the thread spool are provided in the cassette body. A thread simultaneous supply path for guiding the threads together to the sewing portion of the sewing machine main body.

Therefore, according to this configuration, a plurality of yarns unwound from the thread spool of the cassette main body and another thread spool separately prepared from the thread spool are stitched together by the sewing machine through the thread simultaneous supply path. The sewing machine can be guided toward the sewing portion of the main body, and can easily cope with sewing such as double needle sewing.

[0010] The yarn cassette of claim 2 is the same as that of claim 1.
Wherein the other thread spool is arranged in the sewing machine main body or in the vicinity thereof.

Therefore, according to this configuration, the thread spool originally provided on the upper surface of the sewing machine arm may be used as the other thread spool, or the thread spool may be provided on the sewing machine table at the rear side of the sewing machine main body. The cone-shaped thread spool arranged may be used, and can be set freely. Regardless of where the thread spool provided is used, the thread spool is finally gathered in the simultaneous thread supply path of the cassette body and guided together with the thread of the thread spool of the cassette body toward the sewing section of the sewing machine body. can do.

Further, the yarn cassette according to the third aspect is the first aspect.
In the thread cassette described in the above, the thread spool is held in a thread spool holding portion provided inside the cassette main body, and the other thread spool is held in a thread spool holding portion provided outside the cassette main body. It is characterized by being held.

Therefore, according to this configuration, in particular, the thread spool held by the thread spool holding section is of a desired size, larger or smaller than the thread spool accommodated in the thread spool accommodating section. Any one such as a large amount can be set and used, and the number of thread spools can be arbitrarily set to two or three.

Further, the yarn cassette according to the fourth aspect is the third aspect.
In the thread cassette, the cassette main body is mounted in a hanging state on a front surface of the sewing machine main body, and the thread spool holding portion projects rearward from an upper portion of the cassette main body along an upper surface portion of the sewing machine main body. It is characterized by being arranged.

Therefore, according to this configuration, the thread cassette is arranged along the outer shape of the sewing machine main body.
The thread cassette can be compactly installed on the sewing machine main body.

The yarn cassette according to the fifth aspect is the fourth aspect of the present invention.
Wherein the other thread spool supported by the thread spool holding portion is arranged so that its axis is oriented in the front-rear direction, and the thread is fed forward from the other thread spool. It is characterized by having done.

Therefore, according to this configuration, since the thread spool supported by the thread spool holding portion is disposed so that its axis is oriented in the front-rear direction, when the thread spool is used, the thread is fed out. Can be made extremely smooth.

Further, the yarn cassette according to the sixth aspect is the third aspect of the present invention.
The yarn cassette according to any one of claims 1 to 5,
The thread spool holder is detachably supported on the cassette body.

Therefore, according to this structure, when the sewing machine is not used or stored, the thread spool holding portion is detached from the cassette main body so that the sewing machine main body is neat and the storage of the sewing machine main body is not hindered. be able to. In addition, the yarn cassette can be stored compactly.

[0020] The yarn cassette of claim 7 is the same as that of claim 6.
In the thread cassette described in the above, the thread spool holding portion has a mounting leg portion having a cross section formed in an arc shape and protruding in a direction orthogonal to the cross section. An arcuate mounting groove for fitting and supporting the mounting leg is provided.

Therefore, according to this configuration, since the cross section of the mounting leg of the thread spool holding portion and the mounting groove of the thread spool holding portion into which this portion is fitted are formed in an arc shape, the fitting portion is formed at the fitting portion. In addition to providing a structure having strength, the fitting and holding of the mounting leg can be surely and stabilized.

Further, the yarn cassette of claim 8 is the third embodiment.
The yarn cassette according to any one of claims 1 to 7,
The cassette main body is provided with an opening / closing lid that covers the thread spool accommodating portion and the thread simultaneous supply path so as to be openable and closable.

Therefore, according to this configuration, the thread spool accommodating portion and the thread simultaneous supply path can be covered and protected by the opening / closing lid except when the thread spool is replaced, and the intrusion of dust and the like can be prevented.

Further, the yarn cassette according to the ninth aspect is the first aspect.
The yarn cassette according to any one of claims 1 to 8,
The cassette body may further include a yarn locking member that locks yarn end portions of the plurality of yarns derived from the simultaneous yarn supply path.

Therefore, according to this configuration, it is possible to lock the lead-out end of the yarn that has been unwound from the yarn spool and once set in the simultaneous yarn supply path with the yarn locking member,
In this state, the yarn cassette can be carried without disturbing the yarn.

According to a tenth aspect of the present invention, there is provided the yarn cassette according to any one of the first to ninth aspects, wherein a plurality of yarn ends of the plurality of yarns led out of the simultaneous yarn supply path are provided in the cassette body. A yarn cutting member for cutting a portion is provided.

Therefore, according to this configuration, the leading end portion of the thread that has been fed from the thread spool and once set in the thread path can be trimmed to a predetermined length by the thread cutting member.

The thread cassette according to the eleventh aspect is the thread cassette according to any one of the third to tenth aspects, wherein the other thread spool held by the thread spool holding portion and the cassette main body are separated from each other. Between the starting end of the yarn simultaneous supply path,
A yarn guide member for introducing the yarn fed from the other yarn spool into the simultaneous yarn supply path is provided.

Therefore, according to this configuration, the thread fed from the thread spool of the thread spool holding portion can be smoothly and stably introduced into the start end of the thread path by the thread guide member.

The thread cassette according to claim 12 is the yarn cassette according to any one of claims 1 to 11, wherein the other thread spool has a larger thread amount than the thread spool of the cassette body. It is characterized by possession.

Therefore, according to this configuration, in the case of sewing with a large amount of consumption in which only the same thread is repeatedly used, it is advantageous to use the thread spool of the thread spool holding portion, and it is convenient to replace the thread spool, Various operations such as thread winding can be omitted.

A yarn cassette according to a thirteenth aspect of the present invention is the yarn cassette according to any one of the first to twelfth aspects, wherein the yarn cassette is provided at a portion on the starting end side of the simultaneous yarn supply path along the simultaneous yarn supply path. And a resistance applying member for applying resistance to the plurality of yarns guided by the guide.

Therefore, according to this configuration, it is possible to prevent the yarn from being inadvertently unwound from the yarn spool after the yarn unwound from the yarn spool is once set in the yarn path. The slack of the set yarn can be prevented even in the yarn path.

According to a fourteenth aspect of the present invention, in the sewing machine, a thread cassette holding a thread spool on which a thread to be supplied to a sewing portion of the sewing machine body is detachably supported by a cassette mounting portion of the sewing machine body. In the sewing machine provided with the thread cassette described above, a plurality of threads unreeled from the thread spool and another thread spool prepared separately from the thread spool are directed toward the sewing portion of the sewing machine body in the cassette body. 1 to guide
One thread simultaneous supply path is formed, and a plurality of threads passing through the thread simultaneous supply path are respectively supplied to needle holes of a plurality of needles provided in the sewing machine main body.

Therefore, according to this configuration, a plurality of threads unwound from the thread spool of the cassette body and another thread spool separately prepared from the thread spool are stitched together by the sewing machine through the thread simultaneous supply path. The sewing machine can be guided toward the sewing portion of the main body, and can easily cope with sewing such as double needle sewing.

Further, the sewing machine according to claim 15 is the sewing machine according to claim 1.
5. A sewing machine provided with a yarn cassette according to claim 4, wherein a predetermined tension is applied to a plurality of yarns guided to the cassette mounting portion or in the vicinity thereof at an end portion of the simultaneous yarn supply route on the same route. A member and a yarn pick-up member for picking up slack of a plurality of yarns derived from the simultaneous yarn supply path are provided.

Therefore, according to this configuration, according to this configuration, the yarn cassette is set in the yarn simultaneous supply path in association with the operation of mounting the yarn cassette in the cassette mounting portion or after mounting. A plurality of yarns can be easily hung on the yarn tension applying member and the yarn pick-up member.

[0038]

Embodiments of the present invention will be described below with reference to the drawings. This electronically controlled sewing machine
The upper thread cassette containing the thread spool can be mounted in the cassette device section of the arm head, and the thread hooking section of the thread pick-up member and the application of the thread tension in conjunction with the mounting operation when the upper thread cassette is mounted. The structure is such that threading is performed on the member and threading is performed through the needle hole of the needle.

As shown in FIGS. 1 to 3, this electronically controlled sewing machine 1 includes a bed 2, a pillar 3 erected on the right end of the bed 2, and a top end of the pillar 3. It has an arm 4 extending to the left. The arm unit 4 includes a well-known needle bar vertical movement mechanism (not shown), a cassette mounting unit 5 for mounting a yarn cassette described later, a yarn pick-up member 6, a yarn tension applying member 7, an automatic threading mechanism 8, and the like. Have been. The cassette mounting section 5 is provided on the head of the arm section 4 (arm head). A main shaft (not shown) is rotatably supported in the arm portion 4 via a pair of bearings, and the main shaft is rotationally driven via a belt and a pulley 9 by a driving force of a sewing machine motor (not shown). You.

As is well known, a balance crank (not shown) of the thread pick-up member 6 is provided at a left end portion of the main shaft.
A needle bar crank (not shown) is rotatably connected to the balance crank via a crank pin. A needle bar holder (not shown) is fixed to a substantially middle portion of the needle bar 10, and a needle bar crank is connected to the needle bar holder. During sewing, the main shaft is rotationally driven by a sewing machine motor, and the needle bar 10 is reciprocated up and down by a needle bar crank.

As is well known, the arm pick-up member provided with a balance 12 for picking up the upper thread of a thread spool to be described later in time with the vertical movement of the needle 11 fixed to the lower end of the needle bar 10. 6 are provided. A thread hooking section 13 capable of threading from above is formed at the tip of the balance 12, and extends over substantially the entire length of the right end portion of the cassette mounting section 5 in the vertical direction.
A balance moving area 14 in which the thread hooking portion 13 of the balance 12 can reciprocate up and down is provided.

The well-known thread tension applying member 7 for imparting passage resistance to the upper thread is provided below the cassette mounting section 5 so as to protrude forward. The thread tension applying member 7 includes a pair of thread tension plates 1 that can be opened and closed by a presser lifting lever that raises and lowers a well-known cloth presser foot (not shown).
5, a shaft member 16 supporting these thread tension dishes 15,
An operation plate 17 on the rear side of the rear thread tension plate 15, a spring member 18 for elastically urging the rear thread tension plate 15 and the operation plate 17 forward, and an upper thread near the thread tension plate 15. Tension spring 19 for elastically supporting the tension and thread tension dial 2 for adjusting the spring force.
It has a general structure with 0 or the like. As will be described later, the thread tension device 9 is also opened and closed even when the later-described thread cassette is mounted.

A substantially vertical axis is disposed in the pillar 3, and the vertical axis is interlocked to the main shaft via a gear mechanism. Is transmitted to the yarn catching hook. Similar to a general electronic control sewing machine, the work cloth is sewn by cooperation of a needle 11, a thread catching hook, and a cloth feeding mechanism driven by a stepping motor.

The automatic threading mechanism 10 for threading the upper thread through the needle hole of the needle 11 is the same as that described in the specification and drawings of Japanese Patent Application No. 2000-398266 filed by the present applicant. The operation and operation of the thread cassette is transmitted to the automatic threading mechanism 10 via the transmission mechanism by inserting the thread cassette described below from above into the cassette mounting portion 5 and pressing it down as it is. At this time, the threading shaft 21 and the slider guide shaft 2
2 descends, stops in a state where an offset member (not shown) is in contact with the threading positioning member, and lowers the threading slider relatively with respect to the threading shaft 21 and the slider guide shaft 22. The sliding pin 21 is moved along the spiral threading slider cam portion of the threading slider, and the threading shaft 21 is rotated clockwise in a plan view by a predetermined angle in a plan view. The threading hook of the hook mechanism 23 provided at the lower end of the needle 21 is inserted through the needle hole of the needle 11 to hook the upper thread, and then the threading shaft 21 is rotated at a predetermined angle in a counterclockwise direction in plan view. Just rotate
The upper thread is inserted through the needle hole of the needle 11 and then the threading shaft 21
Further, the slider guide shaft 22 is returned to the upper standby position.

Next, the yarn cassette 24 will be described.

As shown in FIGS. 1 and 4 to 14, the yarn cassette 24 accommodates a cassette case 25 having a shape similar to a vertically long rectangular parallelepiped having a small width in the left-right direction, and an inner yarn spool 26 set inside. Spool section 27, a thread spool support member 28 for holding the inner thread spool 26 in the thread spool housing section 27, and a thread path for guiding the upper thread T1 unwound from the inner thread spool 26 to the thread outlet 29. 30, a balance moving space 31 where the thread hooking portion 13 of the balance 12 of the thread pick-up member 6 reciprocates up and down, a thread tensioner accommodating portion 32 into which the thread tension applying member 7 is inserted, and the like. The thread outlet 29 is formed near the right end of the bottom wall of the cassette case 25.

The cassette case 25 has a cassette body 33 made of a synthetic resin and an opening / closing lid 34. The base end of the opening / closing lid 34 can be opened and closed by a pair of upper and lower fulcrum pins 35 at the right end of the cassette body 33. Are linked. However, the opening / closing lid 34 may be configured to slide up and down with respect to the cassette body 33 to open and close. In order to identify the thread color of the upper thread T1 of the inner thread spool 26 and to easily check the remaining amount of the upper thread T1, the opening / closing lid 34 is made of a transparent synthetic resin material. However, at least a portion corresponding to the accommodated inner thread spool 26 in the front-rear direction may be made of a transparent synthetic resin material.

FIG. 11, FIG. 13, FIG. 16, FIG.
As shown in FIG. 9, the upper end of the balance moving space 31 is closed on the right rear surface of the cassette case 25 over a length substantially equal to the vertical length of the cassette case 25. The lower end is formed in a vertically elongated groove shape. FIGS. 1, 18 and 19 show the scale moving space 31 in an easy-to-understand manner by removing the opening / closing lid 34 and a later-described guide member and cutting out the front-side wall portion to make the vertically elongated groove for convenience. It is shown in the form of. The balance moving space 31 also functions as a recess into which the operator's fingers (four fingers from the index finger to the little finger) can be inserted. The user inserts his / her finger into the cassette case 25 and receives the back of the cassette case 25 with the palm of the user.
5 can be easily and stably held in the hand.

The spool holder 27 is provided in the cassette case 2
5 from the left and right center to the left and about 2/3 of the top
The lower part of the cassette main body 33 is formed in an arcuate wall portion
It is formed as.

The inner thread roller support member 28 for accommodating and supporting the inner thread roller 26 in the above-mentioned piece storage section 27 has its lower base end swingable about a left and right support shaft 37 fixed to the cassette body 33. At the center of the disc-shaped thread spool support portion 38 at the lower part thereof, a thread spool support shaft 39 that stands upward is provided.
Further, the piece accommodating portion 27 on the front side of the thread spool supporting portion 38.
The operation piece 4 for hanging the tip of the operator's finger and swinging the inner thread pin support member 28 forward on the portion along the inner wall surface of
0 is provided so as to protrude upward to about half the height of the thread spool support shaft 39. As shown in FIG. 14, the swing range of the inner thread spool support member 28 is limited between the upright position A and the forward inclined position B. At the upright position A, as shown in FIG. 9, the operation piece 40 comes into contact with a locking projection 41 formed on the inner wall surface of the piece housing portion 27, so that it cannot swing further backward. And also
In the inclined position B, as shown in FIG. 14, the lower surface of the thread spool support portion 38 is connected to the front edge portion 4 of the cassette body 33.
2 so that it cannot swing forward any further. Further, a disc-shaped thread spool retainer 43 for preventing the inner thread spool 26 inserted and supported through the thread spool support shaft 39 from coming off from the thread spool support shaft 39 is press-fitted into the thread spool support shaft 39 so as to be insertable and removable. .

The thread tensioner accommodating portion 32 is formed as a space whose lower side is opened below the thread spool accommodating portion 27 of the cassette case 25, and is provided at the left end in the cassette body 33 for the thread path path 30. The area is partitioned by partition walls 44 and 45. Then, on the left side of each of the partition walls 43 and 44,
An outer wall 46 that forms the yarn path 30 in cooperation with each of the partition walls 44 and 45 is provided. In the thread tension device accommodating portion 32, a notch 47 for introducing the thread tension applying member 7 into the thread tension device accommodating portion 32 is formed on a rear wall of the cassette main body 33.

Next, the yarn path 30 will be described. As shown in FIGS. 16, 18 and 19, the yarn path 30
The upper thread T1 is fed upward from the inner thread spool 26 supported by the thread spool support shaft 39 of the thread spool support member 28, and the upper thread unreeled forward from the outer thread spool held by the later-described thread spool holding portion. T
2 is a needle thread guide path for guiding the thread 2 to the thread outlet 29 of the cassette case 25, respectively. The yarn path 30 is formed by the upper thread T
It also functions as a yarn simultaneous supply path that can simultaneously guide 1 and T2. The yarn path 30 includes, in order from the upstream side, a first holding portion 48, a first metal guide pin 49, a second metal guide pin 50, and a third guide pin 51. With the inner thread spool 26 held by the thread spool support shaft 39 of the thread spool support member 28, the upper thread T1 fed upward from the inner thread spool 26 is once provided in the cassette body 33 above the upper thread T1. It is configured to be guided to the first holding portion 48 via a U-shaped thread hooking wire 52 and a thread hooking pin 53.

As shown in FIG. 15, a guide member 54, which is meshed and illustrated (actually, the surface has no mesh pattern and is shown for convenience), is fixed to the front surface of the cassette body 33. The outer peripheral edge of the guide member 54 covers the yarn path 30 from the front and regulates the blind movement of the upper threads T1 and T2. Then, on the front surface of the guide member 54, the thread hooking wire 52, the first holding portion 48, the first guide pin 49, the second guide pin 50, and the portion corresponding to the installation position of the third guide pin 51 are sequentially placed. , "1", "2",
The numbers "3", "4", and "5" are displayed, and it is taught that the upper thread T1 unwound from the inner thread spool 26 is wound in the order of the numbers. In addition, the upper thread T2 unwound from the outer thread spool to be described later is wound over from the number “2”.

As shown in FIGS. 10 and 18, the first holding portion 48 provides the upper yarns T1 and T2 with a passage resistance at the upstream portion of the yarn path 30 and simultaneously with the upper yarn T.
The first holding portion 48 is provided on the left side of the cassette body 33 to prevent the yarn from being entangled with the yarn at 1 and T2 before the yarn tension applying member 7. A metal flat plate 56 fixed to the partition wall 44 facing the passage 30 and having a thread guide groove 55 at an upper portion; a lower portion fixed to the front surface of the flat plate 56; It faces the yarn guide groove 55 and has a flat plate 56.
And a leaf spring 57 having a self-holding elasticity in contact with the surface of the spring. Accordingly, by inserting the upper yarns T1 and T2 into the yarn guide groove 55 from above, the upper yarns T1 and T2 are introduced into the yarn guide groove 55 and the flat And the leaf spring 57, so that relatively low passage resistance is provided.

Next, as shown in FIGS. 16, 18 and 19, the first guide pin 49, the second guide pin 50 and the third guide pin 51 are provided on the downstream side of the yarn path 30. ing. The first guide pin 49 is located at the lower left corner in the cassette case 25, and the second guide pin 50 is located in the cassette case 2.
The third guide pin 51 is located at the lower end of the boundary between the thread tensioner accommodating portion 32 and the balance moving space 31 in the cassette case 2.
5 is provided near the lower end near the right end. The first guide pin 49 and the second guide pin 50 are both made of metal, and their respective ends are embedded and fixed inside the cassette body 33 and the guide member 54, and the upper thread is attached to each end thereof. T1,
T2 does not catch. The third guide pin 51 is made of metal, and has its base end embedded and fixed inside the cassette body 33.

Therefore, when the upper threads T1 and T2 are passed over the yarn path 30 according to the display number of the guide member 54,
It extends vertically downward from the first holding portion 48 to the first guide pin 49, where it is bent at a right angle and horizontally and extends horizontally from the first guide pin 49 to the second guide pin 50, and further from the second guide pin 50. It extends obliquely to the third guide pin 51 and finally reaches the yarn outlet 29.

When the thread cassette 24 is completely mounted in the cassette mounting section 5, the upper thread is placed between the pair of thread tension trays 15 of the thread tension applying member 7 which enters the thread tensioner accommodating section 32 in the cassette case 25. Since T1 and T2 are clamped to provide passage resistance, the upper threads T1 and T2 between the first clamping portion 48 and the thread tension applying member 7 maintain a tensioned state. For this reason, the upper yarns T1 and T2 on the upstream side of the yarn tension applying member 7 in the yarn path 30 do not become entangled with the yarn by the yarn.

It is also possible to equip the yarn cassette 24 with the yarn tension applying member 7 instead of equipping the arm tensioning member 7 with the yarn tension applying member 7. The upper thread T1, between the section 48 and the thread tension applying member 7,
Since T2 maintains the tension state, it is possible to prevent the occurrence of tangling of the yarn due to the twisting of the yarn.

The thread tensioner accommodating section 32 captures the upper threads T1 and T2 of the thread path 30 immediately adjacent to the right side of the thread tension applying member 7 when the thread cassette 24 is mounted. Thread catching piece 5 that pushes down the upper thread T1 and T2 securely between the pair of thread tension discs 15.
8 are provided.

The base end is connected to the right end of the cassette body 33 by a pair of upper and lower fulcrum pins 35 so as to be openable and closable. The opening / closing lid 34 projects rearward on the back surface on the open end side and is integrally formed vertically long. At the same time, a projection 59 is provided, the lower end of which is bent rightward to the left and connected to the left side wall, and this projection 59 contacts the front surface of the guide member 54 when the opening / closing lid 34 is closed. The lid closing position is restricted by the contact. Then, in the closed state, the outer periphery of the opening / closing lid 34 is opened along the yarn path 30, particularly over the arrangement positions of the yarn hooking wire 52, the first holding portion 48, and the first guide pin 49. It is configured such that a slight gap W exists between the surface 34A and the front surface 33A of the peripheral wall of the cassette body 33 facing the outer peripheral opening surface 34A. When the upper thread T1 or T2 is set in the thread path 30 and the opening / closing cover 34 is closed, the gap W happens to be in the middle of the thread path 30 when the upper thread T1 or T2 is closed.
Is loosened and enters between the outer peripheral opening surface 34A of the opening / closing lid 34 and the front surface 33A of the peripheral wall of the cassette body 33, the loosened upper threads T1 and T2 are removed from the outer peripheral opening surface of the opening / closing lid 34. 34A and the front surface 33A of the peripheral wall of the cassette main body 33 are not sandwiched between the main body 34A and the upper thread T1 and T2 during subsequent sewing.

At the substantially central portion of the back surface of the opening / closing lid 34,
In the closed state, a dot-shaped holding projection 60 is formed which abuts against the front surface of the operation piece 40 of the thread spool support member 28 and holds the thread spool support member 28 at the upright position A. On the lower side of the back surface of the opening / closing lid 34, in the closed state, the cassette corresponding to the right side thread path 30 immediately adjacent to the first guide pin 49 and the second guide pin 50, respectively, is provided. The first and second thread regulating pieces 61 and 62 projecting slightly rearward from the front surface 33A of the peripheral wall of the main body 33, and in a state of being substantially in contact with the upper side of the open end of the third guide pin 51 in the closed state. A third yarn regulating piece 63 projecting rearward is formed. These yarn regulating pieces 61, 62, 63
In the closed state of the opening / closing lid 34, the upper yarns T1 and T2 guided to the yarn path 30 are confined in the yarn path 30.
In particular, it prevents blinding forward.

Further, on the left side of the back surface of the opening / closing lid 34,
In the closed state, a locking piece 65 having a locking hole 65A that engages with a locking projection 64 formed on the right side of the partition wall 44 of the cassette body 33 is formed to protrude rearward. The locking piece 65 holds the opening / closing lid 34 in the closed position in cooperation with the locking projection 64. When the opening / closing lid 34 is closed, the locking piece 65 comes into contact with the locking projection 64 and temporarily stops. After bending to the right against the retained elasticity, when the locking holes 65A correspond to the locking projections 64, the fitting is enabled by the return by the elasticity, and from the fitted state, By operating the opening / closing lid 34 in the opening direction (operable with a relatively weak operating force), the opening / closing lid 34 bends rightward against the elasticity, and the locking hole 65A is disengaged from the locking projection 64. ing.

As shown in FIGS. 7, 8, 20 and 21, near the fulcrum pin 35 on the upper right side of the opening / closing lid 34, the upper thread T1 drawn out from the thread outlet 29 is provided. A thread locking member 66 for locking T2 is provided. The thread locking member 66 has a flanged pin 67 fixed to the opening / closing lid 34, and is vertically movably inserted through the flanged pin 67, and is always dish-shaped pressed against the upper surface of the opening / closing lid 34 by a spring action. And a locking plate 68. Therefore, the upper threads T1 and T2 are connected to the locking plate 68 and the opening / closing lid 34.
The upper thread T1, T2 is inserted between the upper thread T1 and the upper thread
Can be locked between the locking plate 68 and the upper surface of the opening / closing lid 34. Further, a slit 69 through which the upper threads T1 and T2 can be inserted is provided in a portion of the opening / closing lid 34 near the front side of the thread locking member 66, and an upper thread inserted through the slit 69 is provided inside the slit 69. A thread cutting blade 70 for cutting T1 and T2 is provided. Therefore, as is apparent from FIGS. 20 and 21, after the upper threads T1 and T2 pulled out from the thread outlet 29 are once locked to the thread locking member 66,
Subsequently, cutting can be performed by inserting the slit into the slit 69, so that the thread can be locked to the thread locking member 66 with the thread ends aligned.

On the left and right front portions of the open / close lid 34, projecting pieces 34B and 34C slightly projecting outward in the left and right direction are respectively formed over the entire vertical length. The overhanging pieces 34B and 34C make it easier to hold the left and right edges of the opening / closing lid 34 with fingers when opening and closing the opening / closing lid 34 (one side edge is hooked by the thumb and the other side edge is The part can be hooked with another finger), and its operability is considered to be improved.

As shown in FIGS. 3 to 6, the cassette body 33 of the thread cassette 24 has a thread piece holding member 7 as a thread piece holding portion for holding the outer thread piece 71 outside.
2 is provided detachably. The thread spool holding member 72 is
A base 73 that is long in the front-rear direction, a thread pin holder 75 in which a front portion swings up and down with a left-right support shaft 74 as a fulcrum at a portion standing on the upper surface of the rear side of the base 73; Mounting leg 76 projecting downward from the front lower surface of 73
In addition, a thread guide plate 77 that rises upward from the front upper surface of the base 73 and a round pin-shaped thread guide pin 78 that projects forward on the front surface of the base 73 are provided. The outer thread piece 71
For the inner thread spool 26, a large thread having a significantly larger amount of retained yarn than the inner thread spool 26 is used. It is considered that this can easily cope with sewing with a large amount of consumption in which the same thread is repeatedly used.

The thread spool holding portion 75 has a disk-shaped thread spool joining piece 79 which is in contact with the rear side surface of the outer thread spool 71 at the rear thereof,
A thread spool holding shaft 80 projecting forward from a center portion of the thread spool joining piece 79 and supporting the outer thread spool 71 so as to be able to be inserted and removed therefrom.
The outer thread spool 71 supported by the thread spool holding shaft 80 is held between the thread spool joining piece 79 by regulating the forward and backward movement thereof, and is press-fitted so as to be insertable into and removable from the thread spool holding shaft 80. And a disc-shaped thread-piece holding piece 81. When replacing or attaching the outer thread spool 71, as shown in FIG. 4, the distal end side of the thread spool holding shaft 80 is swung upward, and the rear side surface of the thread spool joining piece 79 is supported. At this position (shown by a two-dot chain line), the swinging is stopped, and the state of this position is maintained by a finger, and the outer thread piece 71 is replaced or attached. After the replacement, the thread spool holder 75 is placed at the solid line position by its own weight.

The mounting leg 76 has a horizontal cross section formed in an arc shape with the same radius of curvature as the arc-shaped mounting groove 82 formed on the upper surface of the arc-shaped wall portion 36 of the cassette body 33 shown in FIG. , Which is removably fitted into the mounting groove 82, and has a notch at the substantially right and left central portions, and the cutout portion projects downwardly in parallel with the mounting leg portion 76, and A locking piece 83 having a locking portion 83A slightly projecting rearward is provided. On the other hand, inside the mounting groove 82 of the cassette body 33, a through-hole-shaped locking hole 84 for fitting the locking portion 83A of the locking piece 83 is provided. The locking piece 83 cooperates with the locking hole 84 to hold the mounting leg 76 at the insertion position, and resists the elasticity of the locking piece 83 when the mounting leg 76 is inserted. And the locking portion 83
A is inserted in a bent state in which it is pressed against the inner surface of the mounting groove 82, and when the locking portion 83A corresponds to the locking hole 84, it is restored by the elastic force and the locking portion 83A is inserted into the locking hole 84. Then, by lifting the thread spool holding member 72 upward from the engaged state, the locking portion 83A is bent while resisting the elasticity.
Escape from Accordingly, the mounting leg 76 can be removed from the mounting groove 82.

As described above, the attachment leg 76 can be attached to and detached from the attachment groove 82, so that the thread cassette 24 can be removed from the sewing machine and stored.
Although it is very bulky when the spool holding member 72 is connected to the cassette main body 33, by separating the two,
It can be stored compactly. In addition, it does not hinder the carrying and storage of the sewing machine.

The cross section of the mounting leg portion 76 and the mounting groove 82 into which this portion fits are formed in an arc shape, so that the fitting portion can be configured to have strength and contact with each other. Since the area can be increased, the fitting and holding of the mounting leg portion 76 can be surely and stabilized.

When viewed from the front, the yarn guide plate 77 is
16 and the like, as shown in FIG.
5 are formed. The thread guide pin 78 is provided below the thread guide plate 77 and slightly to the left. The upper thread T2 fed forward from the outer thread spool 71 is shown in FIGS.
As shown in FIGS. 6 to 19, after being hooked on the thread guide groove 85 of the thread guide plate 77, the thread guide pin 78 is hooked from the right side, and thereafter the same as the upper thread T <b> 1 of the inner thread spool 26. Is introduced into the yarn path 30 from the position of the first holding portion 48.

As shown in FIG. 17, the lower bottom surface 33B of the arc-shaped wall portion 36 of the cassette body 33 is used when the thread cassette 24 is mounted on the cassette mounting portion 5, as shown in FIG.
The power intake unit 86 of the automatic threading mechanism 8 is operated.

The electronic control sewing machine according to the present embodiment has a single needle 11 as well as a single needle 11 with respect to the needle bar 10.
As shown in FIG. 22, if necessary, two needles 87 and 88 which are unitized can be attached to perform so-called double needle sewing. In the case of this sewing, the upper threads T1 and T2 are set in advance in the thread path 30 at the same time, and a pair of thread tensions of the thread tension applying member 7 when the thread cassette 24 is mounted on the cassette mounting section 5. It is simultaneously inserted between the plates 15 and simultaneously hangs on the thread hook 13 of the balance 12 of the thread pick-up member 6.

In the case of this sewing, since the automatic threading mechanism 8 cannot be used, after the thread cassette 24 is mounted on the cassette mounting section 5, the needles 87 and 88 are manually operated on the upper thread T1 and T1. T2 is threaded. Therefore, when the thread cassette 24 is mounted on the cassette mounting section 5, the power intake section 86 is previously moved to the lower side of the arc-shaped wall section 36 of the cassette main body 33 so that the automatic threading mechanism 8 does not operate. This can be achieved by retreating to a position where the automatic threading mechanism 8 does not engage with the bottom surface 33B or by providing a switching mechanism for transmitting or shutting off power in the drive system of the automatic threading mechanism 8. For example, in the case of the former,
Although not shown, of the power intake portion 86, a portion protruding to the outside of the cassette mounting portion 5 is separated from a portion located inside, and the portion protruding to the outside is screwed, fitted, or the like. It can be connected to a portion located inside, and in the case of two-needle sewing, it may be separated and removed in advance, and in the case of single-needle sewing, it may be connected in advance.

This embodiment is configured as described above.

Therefore, according to the above configuration, when performing the single needle stitching using the thread cassette 24, the upper threads T1, T
2, the upper thread T1, T according to the use condition, the sewing pattern, etc.
2 can be properly used.

For example, when sewing with a relatively large or relatively large amount of thread, the outer thread piece 71 is used. With the open / close lid 34 opened, as shown in FIG. The upper thread T2 fed from the
As described above for the yarn path 30 of the
4, the thread cassette 24 with the opening / closing cover 34 closed is inserted into the cassette mounting portion 5 of the sewing machine from above, and the thread cassette is temporarily inserted. 89 marked on the upper surface on the right side of the opening / closing lid 34 and an arrow 90 marked on the arm 4 of the sewing machine.
(See FIG. 18) and stops at the corresponding position (the display position in FIG. 17, the lower bottom surface 33B of the arc-shaped wall portion 36 of the cassette main body 33 in the power intake portion 86 of the automatic threading mechanism 8). Is in the state immediately before the power take-up section 86 is about to be actuated by contact with the thread take-up section 86).
2A (see FIG. 18).

From this state, as shown in FIG.
By further depressing the thread cassette 24, the upper thread T2 laid over the thread path 30 is inserted between the pair of thread tension plates 15 of the thread tension applying member 7 and the balance of the thread pick-up member 6 12 and the lower bottom surface 3 of the arc-shaped wall portion 36 of the cassette body 33.
Since the power intake unit 86 is operated by 3B, the hook mechanism 23 of the automatic threading mechanism 8 is operated, and the upper thread T2 is threaded through the needle hole of the needle 11.

Then, as shown in FIG. 19, the thread cassette 24 is further pushed down, and the
When the lower bottom surface 33B of the third arc-shaped wall portion 36 comes into contact with the step portion 91 provided on the cassette mounting portion 5 and the further downward movement is stopped, the power intake portion 86 is moved to the cassette body 33. Is disengaged from the lower bottom surface 33B of the arc-shaped wall portion 36, and the automatic threading mechanism 8 returns to the original position. Therefore, the sewing can be started from this state.

Further, instead of the upper thread T2, the upper thread T1 is wrapped around the thread path 30 in the procedure shown in FIG. 15, and set and used for sewing in the same manner as when the upper thread T2 is used. be able to.

When performing the double-needle stitching, as described above, it is necessary to set the power intake portion 86 in advance so as not to be engaged with the lower bottom surface 33B of the arc-shaped wall portion 36 of the cassette body 33. The switching mechanism for transmitting and interrupting power in the middle of the drive system of the automatic threading mechanism 8 is turned off, and two unitized needles 87 and 88 are attached to the needle bar 10. . Then, in the yarn cassette 24, the upper yarns T1 and T2 fed from the inner yarn spool 26 and the outer yarn spool 71 are simultaneously set in the yarn path 30 and
By mounting the yarn cassette 24 in this state on the cassette mounting portion 5, the upper yarns T1 and T2 are simultaneously inserted between the pair of yarn tension plates 15 of the yarn tension applying member 7 and the yarn pick-up member 6 The thread is also hooked on the thread hook 13 of the balance 12 at the same time. Then, the thread ends of the upper threads T1, T2 are individually threaded through the needle holes of the needles 87, 88 by an operator. In this state, predetermined two-needle sewing can be performed.

In this case, the outer thread spool 7 provided on the thread spool holding member 72 is used as the upper thread T2. However, the present invention is not limited to this. For example, the thread originally provided on the upper surface of the sewing machine arm is used. A piece may be used, or a cone-shaped thread piece disposed on the sewing machine table at the back side of the sewing machine body may be used, and the setting can be freely selected and set. As described above, when the thread spool is arranged away from the thread cassette 24, it is desirable to provide an appropriate upper thread guide means therebetween.

In this embodiment, the thread spool holding member 7
Although an example in which one outer thread spool 71 is held in the second embodiment has been described, for example, the base 73 of the thread spool holding member 72 is formed to be longer in the left-right direction or additionally in the front-rear direction, It is also possible to arrange two or more pieces 71 in the left-right direction or a plurality of pieces in the front-rear direction in addition thereto, and to provide a large number of two or more outer thread pieces 71 as a whole. This is particularly effective in the case of embroidery sewing using a large number of color threads.

[0083]

According to the first aspect of the present invention, the sewing machine body is sewn together with a plurality of threads which are unwound from the thread spool and another thread spool separately prepared from the spool. Since a single simultaneous yarn supply path for guiding the yarn toward the section is formed, a plurality of yarns unwound from the yarn spool of the cassette body and another yarn spool separately prepared from the yarn spool are formed by the yarn By the simultaneous supply path, the guides can be guided together to the sewing portion of the sewing machine main body, and sewing such as double needle sewing can be easily dealt with.

According to the second aspect of the present invention, since the other thread spool is disposed in the sewing machine main body or in the vicinity thereof, the other thread spool is originally provided on the upper surface of the sewing machine arm. May be used, or
A cone-shaped thread spool disposed on the sewing machine table on the rear side of the sewing machine main body may be used, and can be freely selected and set. Regardless of where the thread spool provided is used, the thread spool is finally gathered in the simultaneous thread supply path of the cassette body and guided together with the thread of the thread spool of the cassette body toward the sewing section of the sewing machine body. can do.

According to the third aspect of the present invention, the thread spool is held in a thread spool accommodating portion provided inside the cassette main body, and the other thread spool is provided outside the cassette main body. Since the thread spool held by the thread spool holding section is particularly held, the thread spool held by the thread spool holding section is larger or smaller in an arbitrary shape with respect to the thread spool stored in the thread spool housing section. An arbitrary material such as a large amount of yarn can be set and used, and the number of thread spools can be arbitrarily set to two or three.

According to the fourth aspect of the present invention, the cassette main body is mounted in a hanging state on the front surface of the sewing machine main body, and the thread spool holding portion is provided on an upper surface of the sewing machine main body from above the cassette main body. Since the thread cassette is projected rearward along the portion, the thread cassette can be arranged along the outer shape of the sewing machine main body, and the thread cassette can be compactly installed on the sewing machine main body.

According to the fifth aspect of the present invention, the other thread spool supported by the thread spool holding portion is arranged so that its axis is oriented in the front-rear direction, and the thread is threaded to the other thread spool. The thread spool supported by the thread spool holding portion is always disposed so that its axis is oriented in the front-rear direction, and when the thread spool is used, the thread spool is extremely smoothly advanced. Can be

According to the sixth aspect of the present invention, the thread spool holding portion is detachably supported by the cassette main body. Therefore, when the sewing machine is not used or when the sewing machine is stored, the thread spool is held. By detaching the holding portion from the cassette main body, it is possible to make the sewing machine main body clear so that it does not hinder the storage of the main body. In addition, the yarn cassette can be stored compactly.

According to the seventh aspect of the present invention, the thread spool holding portion has a mounting leg portion having a circular cross section and projecting in a direction orthogonal to the cross section. Since an arc-shaped mounting groove for fitting and supporting the mounting leg of the thread spool holding portion is provided, it is possible to provide a structure in which the fitting portion has strength, and to increase the contact area with each other. Therefore, the fitting and holding of the mounting leg can be reliably and stably performed.

According to the eighth aspect of the present invention, since the cassette body is provided with an opening / closing lid for opening and closing the thread spool accommodating portion and the simultaneous thread supply path, the thread spool is held except when the thread spool is replaced. The housing section and the simultaneous yarn supply path can be covered and protected by the open / close lid, and the intrusion of dust and the like can be prevented.

According to the ninth aspect of the present invention, since the cassette main body is provided with the yarn locking member for locking the yarn end portions of the plurality of yarns derived from the simultaneous yarn supply path, The leading end of the thread that has been unwound from the bridge and once set in the thread simultaneous supply path can be locked to the thread locking member, and in this state, the thread cassette is carried without disturbing the thread. be able to.

Further, according to the tenth aspect of the present invention, since the cassette main body is provided with a thread cutting member for cutting thread end portions of a plurality of threads derived from the simultaneous thread supply path, The lead-out end of the thread that has been fed out and once set in the thread path can be cut to a predetermined length by the thread cutting member.

According to the eleventh aspect of the present invention, the other thread spool held by the thread spool holding portion and the start end of the simultaneous thread supply path of the cassette main body are connected to each other. Since a thread guide member is provided for introducing the thread unwound from the thread spool into the simultaneous thread supply path, the thread unreeled from the thread spool of the thread spool holding unit is controlled by the thread guide member at the start end of the thread path. Can be smoothly introduced in a stable state.

According to the twelfth aspect of the present invention, the other thread spool has a larger amount of thread than the thread spool of the cassette main body, so that only the same thread is repeatedly used, resulting in high consumption. In the case of sewing, it is convenient to use the thread spool of the thread spool holding section, and various operations such as replacement of the thread spool and thread winding can be omitted.

According to the thirteenth aspect of the present invention, a resistance imparting member for imparting resistance to a plurality of yarns guided along the simultaneous yarn supply path is provided at the start end side of the simultaneous yarn supply path. Since the thread provided from the thread spool is set in the thread route once, it is possible to prevent the yarn from being carelessly unreeled from the thread spool, and even in the thread route. The slack of the set yarn can be prevented.

According to the fourteenth aspect of the present invention,
One thread simultaneous supply for guiding a plurality of threads unreeled from the thread spool and another thread spool separately prepared from the thread spool to the sewing body of the sewing machine body to the cassette body. A plurality of yarns are formed to form a path, and the plurality of yarns passing through the simultaneous yarn supply path are respectively supplied to needle holes of a plurality of needles provided in the sewing machine main body. A plurality of yarns unwound from another thread piece prepared separately from the thread piece can be guided together toward the sewing portion of the sewing machine main body by the thread simultaneous supply path, and sewing such as double needle sewing can be performed. Can be easily dealt with.

According to the fifteenth aspect of the present invention, a yarn for applying a predetermined tension to a plurality of yarns guided to the cassette mounting portion or in the vicinity thereof at the end portion of the simultaneous yarn supply route on the same route. Since a tension applying member and a yarn pick-up member for picking up slack of a plurality of yarns derived from the yarn simultaneous supply path are provided, in association with an operation of mounting the yarn cassette to the cassette mounting portion, or after mounting. ,
A plurality of yarns set in the simultaneous yarn supply path can be easily hooked on the yarn tension applying member and the yarn pickup member.

[Brief description of the drawings]

FIG. 1 is a front view of an electronically controlled sewing machine and a thread cassette according to an embodiment of the present invention.

FIG. 2 is a plan view of the sewing machine arm with a thread cassette removed.

FIG. 3 is a plan view of the sewing machine arm with the thread cassette attached.

FIG. 4 is a side view of the yarn cassette.

FIG. 5 is a side view of the thread spool holding member.

FIG. 6 is a side view of a mounting portion of the thread holding member, showing a main part cut away.

FIG. 7 is a front view of a cassette case of the thread cassette.

FIG. 8 is a cross-sectional view taken along line AA of FIG. 7;

FIG. 9 is a sectional view taken along line CC in FIG. 7;

FIG. 10 is a sectional view taken along line DD in FIG. 7;

FIG. 11 is a sectional view taken along line EE in FIG. 7;

FIG. 12 is a sectional view taken along line FF of FIG. 7;

FIG. 13 is an enlarged sectional view taken along line GG of FIG. 7;

FIG. 14 is a sectional side view of a main part of the cassette body.

FIG. 15 is a front view of the cassette main body, showing a position where the upper thread is passed.

FIG. 16 is a front view showing a state before the thread cassette is mounted on the cassette mounting section.

FIG. 17 is a sectional side view of a main part of the yarn cassette in the course of being mounted on the cassette mounting portion.

FIG. 18 is a front view showing a state where the thread cassette is being mounted on the cassette mounting portion.

FIG. 19 is a front view showing a state where the thread cassette has been completely mounted on the cassette mounting section.

FIG. 20 is a top view of the cassette case.

FIG. 21 is a front view of the cassette case.

FIG. 22 is a front view of the sewing machine arm in a state where two needles and a thread cassette are set.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Sewing machine 5 Cassette mounting part 6 Thread pick-up member 7 Thread tension applying member 11 Needle 24 Thread cassette 26 Inner thread piece 27 Thread piece accommodation section 30 Thread path (thread simultaneous supply path) 34 Opening / closing lid 43 Thread piece holding 54 Guide member 66 Thread locking member 70 Thread cutting blade 71 Outer thread piece 72 Thread piece holding member 76 Attachment leg 78 Thread guide pin 82 Attachment groove 87, 88 Needle

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Hidetaka Inagaki 15-1, Naeshiro-cho, Mizuho-ku, Nagoya-shi Inside Brother Industries, Ltd. (72) Inventor Masao Ogawa 15-1 Naeshiro-cho, Mizuho-ku, Nagoya-shi Brother Industrial Co., Ltd. Company F term (reference) 3B150 AA11 CD01 CD05 CD06 CD07 CE02 CE23 FA01 FA03 FA05 FA06 FA07

Claims (15)

[Claims] 1. A thread cassette in which a cassette main body is detachably mounted to a sewing machine main body and holds a thread spool on which a thread for supplying to a sewing portion of the sewing machine main body is wound. One thread simultaneous supply path for guiding a plurality of threads unreeled from the thread spool and another thread spool prepared separately from the thread spool to a sewing portion of the sewing machine body in the cassette body. A yarn cassette characterized by forming: 2. The thread cassette according to claim 1, wherein the other thread spool is disposed at or near the sewing machine main body. 3. The thread spool is held in a thread spool accommodating section provided inside the cassette main body, and the other thread spool is held in a thread spool holding section provided outside the cassette main body. The yarn cassette according to claim 1, wherein 4. The cassette body is mounted in a hanging state on a front surface of the sewing machine body, and the thread spool holding portion is arranged to protrude rearward from an upper portion of the cassette body along an upper surface portion of the sewing machine body. The yarn cassette according to claim 3, wherein: 5. The other thread spool supported by the thread spool holding portion is arranged so that its axis is oriented in the front-rear direction.
The thread cassette according to claim 4, wherein the thread is fed forward from the other thread spool. 6. The thread spool holding section is detachably supported on the cassette main body.
A yarn cassette according to any one of claims 5 to 5. 7. The thread spool holding portion has a mounting leg portion having a cross section formed in an arc shape and protruding in a direction orthogonal to the cross section. The cassette body has a mounting leg of the thread spool holding portion. 7. The thread cassette according to claim 6, wherein an arc-shaped mounting groove for fitting and supporting the portion is provided. 8. The thread cassette according to claim 3, wherein the cassette body is provided with an opening / closing cover for opening and closing the thread spool accommodating portion and the thread simultaneous supply path. . 9. The cassette body according to claim 1, further comprising: a thread locking member configured to lock thread end portions of a plurality of threads derived from the simultaneous thread supply path. The yarn cassette according to any one of the above. 10. The cassette body according to claim 1, further comprising a thread cutting member for cutting thread end portions of a plurality of threads derived from the simultaneous thread supply path.
The yarn cassette according to any one of the above. 11. A yarn fed from the other thread spool between the other thread spool held by the thread spool holding portion and a start end of the simultaneous thread supply path of the cassette body. The yarn cassette according to any one of claims 3 to 10, further comprising a yarn guide member for introducing the yarn into the simultaneous yarn supply path. 12. The thread cassette according to claim 1, wherein the other thread spool has a larger amount of thread than the thread spool of the cassette main body. 13. A resistance applying member for applying resistance to a plurality of yarns guided along the simultaneous yarn supply path is provided at a portion on the starting end side of the simultaneous yarn supply path. The yarn cassette according to any one of claims 1 to 12. 14. A sewing machine having a thread cassette holding a thread spool on which a thread to be supplied to a sewing section of the sewing machine main body is supplied to the cassette body so as to be detachably mounted on a cassette mounting portion of the sewing machine main body. In the cassette body, one thread for guiding a plurality of threads unreeled from the thread spool and another thread spool prepared separately from the thread spool toward a sewing portion of a sewing machine main body. A thread cassette is provided, wherein a simultaneous supply path is formed, and a plurality of yarns passing through the thread simultaneous supply path are respectively supplied to needle holes of a plurality of needles provided in the sewing machine main body. Sewing machine. 15. In the cassette mounting portion or in the vicinity thereof,
A yarn tension applying member that applies a predetermined tension to a plurality of yarns guided on the same line at the end portion of the simultaneous yarn supply route, and a yarn pick-up that takes up slack of the plurality of yarns derived from the simultaneous yarn supply route A sewing machine provided with the thread cassette according to claim 14, comprising a member.