JP2000140474A - Bobbin winding roll, bobbin winding for bobbin winding roll and sewing machine provided with bobbin winding roll - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a bobbin winding roll, a bobbin winding method for the bobbin winding roll and a sewing machine provided with the bobbin winding roll capable of accurately detecting the time immediately before the exhaustion of a thread wound to the bobbin winding roll without affecting the winding amount of the thread wound to the bobbin winding roll or without requiring special attention at the time of winding the thread around the bobbin winding roll. SOLUTION: After setting a bobbin 7 to a bobbin attaching shaft 11, by rotating the bobbin attaching shaft 11 in the direction of winding the bobbin thread 13, the bobbin thread 13 abutted to a rib 31 formed in a helical shape is guided to a prescribed position of the peripheral surface of a bobbin shaft 27. Then, the bobbin thread 13 guided through the rib 31 is wound while forming a bulge of the wound thread on the peripheral surface of the bobbin shaft 27.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bobbin roll, a bobbin winding method, and a sewing machine provided with the bobbin roll. More particularly, the present invention relates to a bobbin roll. The present invention relates to a bobbin roll, a bobbin winding method, and a sewing machine provided with the bobbin roll.

[0002]

2. Description of the Related Art Conventionally, in sewing with a sewing machine, if the lower thread wound on a bobbin or the upper thread wound on a thread spool completely disappears, sewing cannot be performed or a defective product may be produced. In order to prevent these problems, many sewing machines having a thread breakage advance notification function for informing a sewing manufacturer in advance that a lower thread or an upper thread is lost have been proposed.

[0003] Among the proposals for such a thread breakage notification function, there have been proposed various proposals for improving the detection accuracy of thread breakage. For example, Japanese Patent Application Laid-Open No. 6-292780 discloses a sewing machine. In the bobbin and the method of detecting the breakage of the bobbin, as shown in FIG.
7 and the like, and the lower thread 53 is wound around a stepped bobbin shaft 41 composed of a large-diameter portion 49 and a small-diameter portion 51, thereby forming a “thread pool” in the small-diameter portion 51. The bobbin thread 53 wound around the bobbin 45 is used evenly with respect to the bobbin shaft 41. When a predetermined amount of the bobbin thread 53 is used, the bobbin thread 53 wound around the large-diameter portion 49 is used. Disappeared earlier,
The peripheral surface of the large diameter portion 49 is exposed. At this time, the sensor 47 provided in the vicinity of the bobbin 45 recognizes the reflected light or the reflected wave obtained through the peripheral surface of the large-diameter portion 49, whereby the lower thread 53 is wound around the "thread pool". It informs the sewing manufacturer that only the required amount is left.

[0004] Further, in the disclosed technology disclosed in US Pat. No. 3,845,320, as shown in FIG. 7, a bobbin shaft 55 and flanges 59 provided at both ends of the bobbin shaft 55 to regulate the winding width of the bobbin thread 57 are provided. 61, an intermediate flange 63 provided on the peripheral surface of the bobbin shaft 55, and a sensor 65, and the lower thread 57 wound on the peripheral surface of the bobbin shaft 55 And wound into a small winding area 67 and a large winding area 69 which are different from each other. The bobbin thread 57 wound on the peripheral surface of the bobbin shaft 55 is used from the bobbin thread 57 wound on the mass winding area 69, and the bobbin thread 57 wound on the mass winding area 69.
After disappearing, the lower thread 57 wound in the small amount wound area 67 is used. At this time, the sensor 65 provided in the vicinity of the bobbin 71 recognizes the detection light blocked by the lower thread 57 due to a decrease in the lower thread 57 wound in the small amount winding area 67, and thereby, The sewing manufacturer is informed that only a small amount of the lower thread 57 wound in the small winding area 67 is left.

[0005]

However, in the above-mentioned Japanese Patent Application Laid-Open No. 6-292780, the provision of the large-diameter portion 49 and the small-diameter portion 51 on the bobbin shaft 41 reduces the winding amount of the lower thread in the small-diameter portion 51. The winding amount of the lower thread 53 decreases by the difference of the lower thread winding amount in the large diameter portion 49,
As a result, the number of replacements of the bobbin 45 is increased. Also, by providing the large diameter portion 49 and the small diameter portion 51, when the bobbin thread 53 is wound around the bobbin 45, the small diameter portion 51
It is necessary to take care to wind the bobbin thread 53 from above, which causes a burden on a sewing manufacturer.

Also, in the above-mentioned US Pat. No. 3,845,320, it is necessary to start winding the small thread 57 from the small amount winding area 67 when winding the bobbin thread 57 around the bobbin 71, as in Japanese Patent Application Laid-Open No. 6-292780. This has reduced the work efficiency of sewing manufacturers.

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and has an effect on the winding amount of the yarn wound on the wound roll and special care when winding the yarn on the wound roll. It is an object of the present invention to provide a bobbin roll, a bobbin roll winding method, and a sewing machine provided with a bobbin roll, which can accurately detect the time before the yarn wound around the bobbin roll is lost without requiring the bobbin roll. .

[0008]

In order to achieve the above object, a yarn winding roll according to claim 1 is arranged so as to protrude from a yarn winding shaft capable of winding a yarn and a peripheral surface of the yarn winding shaft. In the bobbin roll provided with the yarn guiding section, the yarn guiding section guides the thread to be brought into contact when the yarn winding shaft rotates in the winding direction to a predetermined position on the circumferential surface of the yarn winding shaft. It is a feature.

According to this yarn winding roll, when the yarn is wound on the peripheral surface of the yarn winding shaft while rotating the yarn winding shaft, the yarn abutting on the yarn guiding portion is formed on the peripheral surface of the yarn winding shaft. Guide to a predetermined position. As a result, the yarn is wound in order from a predetermined position on the peripheral surface of the yarn winding shaft, and a "yarn pool" is formed at a predetermined position on the peripheral surface of the yarn winding shaft. Therefore, when performing sewing with a sewing machine, the "thread pool" wound at a predetermined position on the peripheral surface of the thread take-up shaft is used last. By arranging a sensor capable of detecting the amount of winding of the "thread pool" wound at the predetermined position, it is possible to accurately detect the time immediately before the yarn runs out, which is very convenient. In addition, when forming a "pool", simply rotate the winding shaft in the direction in which the yarn is wound,
Since the "thread pool" can be formed, the sewing manufacturer does not need to pay special attention and is very easy to use.

In order to achieve the above object, a yarn winding method for a yarn winding roll according to a second aspect of the present invention is arranged such that a yarn winding shaft capable of winding a yarn and a peripheral surface of the yarn winding shaft are projected. In the method for winding a bobbin roll provided with a yarn guiding portion, when the yarn winding shaft rotates in a direction in which the yarn is wound, the yarn abutting on the yarn guiding portion is moved to a predetermined position on the circumferential surface of the yarn winding shaft. It is characterized by winding while guiding.

According to the yarn winding method of the yarn winding roll, the yarn is rotated in a direction in which the yarn is wound around the yarn winding shaft, so that the yarn is moved to a predetermined position on the peripheral surface of the yarn winding shaft through the yarn guiding portion. While being wound around the yarn winding shaft. As a result, the yarn is wound in order from a predetermined position on the peripheral surface of the yarn winding shaft, and a "yarn pool" is formed at a predetermined position on the peripheral surface of the yarn winding shaft. Therefore, when sewing with a sewing machine,
Since the "yarn pool" wound at a predetermined position on the peripheral surface of the yarn winding shaft portion is used last, for example, the "yarn pool" wound at a predetermined position on the peripheral surface of the yarn winding shaft portion is used. Is arranged, a sensor that can detect the winding amount can be accurately detected just before the yarn runs out, which is very convenient.
In addition, when forming the "pool", it is possible to form the "pool" simply by rotating the take-up shaft in the direction in which the thread is wound. Very easy to use, no need to pay.

According to a third aspect of the present invention, there is provided a sewing machine provided with a bobbin roll, wherein the bobbin bobbin is configured to protrude from a bobbin shaft capable of winding a bobbin and a peripheral surface of the bobbin bobbin. A bobbin roll provided with a bobbin guiding portion for guiding a thread that abuts when the bobbin winds up in the direction of winding the bobbin to a predetermined position on the peripheral surface of the bobbin, and a yarn wound around the bobbin roll The yarn winding arrangement section for arranging the yarn winding roll when the yarn is fed out, and the yarn wound at a predetermined position on the peripheral surface of the yarn winding shaft section via the yarn guiding section, provided near the yarn operation arrangement section. And a detectable sensor.

According to the sewing machine provided with the wound roll,
The remaining amount of the yarn wound around the yarn winding roll is detected via a sensor arranged at a position where the yarn wound at a predetermined position on the peripheral surface of the yarn winding shaft can be detected. With this, the remaining amount of the lower thread is detected for the "yarn pool" used last on the peripheral surface of the yarn winding shaft portion, so that it is possible to accurately detect the time immediately before the thread runs out, and Can be used without waste, which is very convenient.

According to a fourth aspect of the present invention, there is provided a bobbin roll, a method of winding the bobbin roll, or a sewing machine provided with the bobbin roll, according to any one of the first to third aspects. In the method or the sewing machine provided with the bobbin roll, the yarn guiding portion is spirally arranged on the peripheral surface of the bobbin shaft.

[0015] According to the bobbin roll, the bobbin winding method, or the sewing machine provided with the bobbin roll, the bobbin roll according to any one of claims 1 to 3, the bobbin winding method, or In addition to the effect of the sewing machine provided with the bobbin roll, furthermore, since the thread guide section is spirally arranged on the peripheral surface of the bobbin shaft, by rotating the bobbin in the direction in which the bobbin is wound around the bobbin shaft, It is possible to effectively guide the yarn to a predetermined position on the peripheral surface of the yarn winding shaft portion, and it is possible to provide a step or the like on the peripheral surface of the yarn winding shaft portion as described in Japanese Patent Application Laid-Open No. 6-292780. There is no decrease in the amount of winding of the yarn due to the increase in the shaft diameter, and deterioration in strength due to the reduction in the shaft diameter does not occur,
It is very convenient.

Further, a bobbin roll according to claim 5, a bobbin winding method, or a sewing machine provided with the bobbin roll, the bobbin roll according to any one of claims 1 to 4, and the bobbin roll In the method or the sewing machine provided with the bobbin roll, the bobbin guide is formed integrally with the bobbin shaft.

According to this bobbin roll, the bobbin winding method, or the sewing machine provided with the bobbin roll, the bobbin roll according to any one of claims 1 to 4, the bobbin winding method, or In addition to the effect of the sewing machine provided with the bobbin roll, the bobbin guiding portion is formed integrally with the bobbin shaft, so that it is easy to manufacture and there is no mounting error, which is very convenient.

[0018] In addition, a bobbin roll according to claim 6, a bobbin winding method, or a sewing machine provided with a bobbin roll, the bobbin roll according to any one of claims 1 to 5, and the bobbin winding up the bobbin roll. In a method or a sewing machine provided with a bobbin roll, a flange is provided on at least a side of the peripheral surface of the bobbin winding shaft where the bobbin is guided through the bobbin guiding portion to regulate the bobbin winding position within a predetermined range. It is characterized by the following.

According to the wound roll, the winding method of the wound roll, or the sewing machine provided with the wound roll, the wound roll according to any one of claims 1 to 5, the method of winding the wound roll, or In addition to the effect of the sewing machine having the bobbin roll, a flange is provided on the peripheral surface of the bobbin shaft to regulate the bobbin winding position within a predetermined range.
The yarn wound around the yarn winding shaft does not exceed a predetermined range on the peripheral surface of the yarn winding shaft, which is very convenient.

[0020] Furthermore, a bobbin roll according to claim 7, a bobbin winding method, or a sewing machine provided with a bobbin roll, the bobbin roll according to any one of claims 1 to 6, and bobbin winding of the bobbin roll. In the method or the sewing machine including the bobbin roll, the bobbin guiding section is formed continuously on the peripheral surface of the bobbin shaft.

According to this bobbin roll, the bobbin winding method, or the sewing machine provided with the bobbin roll, the bobbin roll according to any one of claims 1 to 6, the bobbin roll bobbin winding method, or In addition to the effect of the sewing machine equipped with a bobbin roll, the thread guide section is formed continuously on the peripheral surface of the thread take-up shaft, so that the thread does not get caught or entangled in the thread guide section, making it smooth. This is very convenient because it is wound around the peripheral surface of the yarn winding shaft.

According to a eighth aspect of the present invention, there is provided a sewing machine having the bobbin roll according to any one of the third to seventh aspects, wherein the sensor is an optical sensor. Things.

According to the sewing machine having the wound roll,
In addition to the effect of the sewing machine provided with the thread winding roll according to any one of claims 3 to 7, an optical sensor is used as a sensor, so that a thread to be detected is detected by a contact sensor or the like. Since the range to be detected is narrower and the yarn of the "pool" can be detected with high accuracy, it is possible to more accurately detect the point immediately before the yarn runs out.

According to a ninth aspect of the present invention, there is provided a sewing machine provided with the bobbin roll according to any one of the third to eighth aspects. Further, a bobbin winding arrangement section to be arranged is further provided, and when the bobbin roll is arranged in the bobbin winding arrangement section, an end of the bobbin winding shaft portion facing the bobbin winding arrangement section, and when the bobbin roll is arranged in the bobbin winding arrangement section. The end of the yarn winding shaft facing the yarn handling arrangement portion is the same end.

According to the sewing machine having the wound roll,
An end of a bobbin winding shaft portion facing the bobbin winding arrangement portion when the bobbin roll is arranged on the bobbin winding arrangement portion, in addition to the effect of the sewing machine provided with the bobbin roll according to any one of claims 3 to 8. When arranging the bobbin roll in the yarn winding arrangement section, the end of the yarn winding shaft section facing the yarn winding arrangement section is the same end, so that the sewing manufacturer is arranged in the yarn winding arrangement section. When placing the wound bobbin roll in the yarn winding arrangement section, by placing the bobbin roll in the yarn winding arrangement section while holding the bobbin roll arranged in the yarn winding arrangement section, the bobbin roll can be replaced. In addition, the position of the "thread pool" formed on the peripheral surface of the yarn winding shaft can be set to a desired position, which is very convenient.

According to a tenth aspect of the present invention, there is provided a sewing machine provided with a bobbin roll according to the ninth aspect, wherein a bobbin winding shaft portion for arranging the bobbin roll on the bobbin winding arrangement portion, It is characterized in that it is substantially parallel to the yarn winding shaft when the yarn winding roll is arranged on the arrangement portion.

According to the sewing machine provided with the wound roll,
In addition to the effect of the sewing machine provided with the bobbin roll according to claim 9, a bobbin winding shaft for arranging the bobbin roll in the bobbin winding arrangement section, and a bobbin winding shaft for arranging the bobbin roll in the bobbin winding arrangement section. Since the parts and the parts are in a substantially parallel relationship, the sewing manufacturer moves the bobbin rolls arranged in the bobbin winding arrangement in parallel without changing the direction of the bobbin rolls, while keeping the state in which the bobbin rolls are held. The winding roll can be arranged in the yarn handling arrangement section, and the usability is further improved.

[0028]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 is an external front view showing the sewing machine of the present embodiment.

The sewing machine 1 shown in FIG. 1 includes a sewing table 3, a shuttle 5, a bobbin 7, a liquid crystal display 9, a bobbin mounting shaft 11, a lower thread 13, an upper thread 15, a memory card 17, a speed volume 19, and the like. The embroidery sewing machine is configured to sew the fabric while the lower thread 13 and the upper thread 15 are being unreeled together with the movement of the fabric (not shown) arranged on the sewing table 3. Such a sewing operation is performed by repeatedly starting and stopping the sewing by pressing the start / stop switch 21, and the sewing speed can be freely changed via a knob of the speed volume 19. .

The shuttle 5 is provided in the sewing table 3. When the bobbin 7 is stored in the shuttle 5, the shuttle 5 rotates counterclockwise when viewed from above, and the bobbin 13 wound around the bobbin 7. Using a horizontal shuttle that feeds out in the horizontal direction. This bobbin 7
The bobbin thread 13 wound around is sequentially fed out while being synchronized with the sewing speed according to the speed volume 19 described above.
The bobbin 7 rotates smoothly within the shuttle 5 according to the tension.

The bobbin mounting shaft 11 is configured to be driven to rotate clockwise as viewed from above via a motor (not shown). When a sewing manufacturer winds the bobbin thread 13 around the bobbin 7, After the bobbin 7 is set on the bobbin mounting shaft 11, the bobbin mounting shaft 11 is driven to rotate, and the lower thread 13 supplied from a thread spool (not shown) is wound around the bobbin 7. The bobbin 7 on which the bobbin thread 13 has been wound in this manner is moved in parallel without changing the direction of the bobbin 7 while maintaining the gripping state in which the bobbin 7 set on the bobbin mounting shaft 11 is removed, thereby achieving the above-described operation. It is possible to set it on the hook 5 which has been set.

Further, as for the upper thread 15, the upper thread 1
The thread spool (not shown) around which the wire 5 is wound is disposed on a thread spool holding portion (not shown) provided on the back surface of the sewing machine 1 while synchronizing with the sewing speed according to the speed volume 19 described above. The required amount of the upper thread 15 is sequentially supplied.

The liquid crystal display 9 is used for not only instructing various settings of the sewing machine 1 and instructing a control operation, but also a bobbin thread 13 wound around the bobbin 7 via a sensor 23 arranged near the bobbin 7. When it is recognized that is less than the predetermined amount,
Displaying a message notifying that the bobbin thread 13 is almost exhausted to the sewing manufacturer (see FIG. 2A), or winding the bobbin thread 13 around the bobbin 7 set on the bobbin mounting shaft 11 For example, a message notifying the user that the device is in the middle is displayed (see FIG. 2B).

Further, the memory card 17 is a storage medium in which various embroidery data are stored. By inserting the memory card 17 into the memory card slot 25,
Various embroidery can be performed based on the embroidery data stored in the memory card 17.

Next, the above-described bobbin 7 will be described in detail with reference to FIG. FIG. 3 is a schematic side cross-sectional view of the above-described bobbin 7, and shows a process in which the bobbin thread 13 is wound around the bobbin 7 in the order of FIGS. 3 (A), 3 (B), and 3 (C). Is shown.

As shown in FIG. 3A, the bobbin 7
A bobbin shaft 27 as a bobbin roll;
Of the bobbin shaft 27 and a helical rib 31 continuously projecting from the peripheral surface of the bobbin shaft 27. After the bobbin 7 is set on the bobbin mounting shaft 11 described above, the bobbin mounting shaft 11 rotates clockwise as viewed from above (in the direction of the arrow in FIG. 3) to wind up the lower thread 13. I have. At this time, the lower thread 13 abutting on the rib 31 is guided downward along the shape of the rib 31. As a result, in the initial stage of the bobbin winding operation, one side of the bobbin shaft 27 (the lower side in FIG. 3).
Then, a "thread pool" in which the lower thread 13 is wound non-uniformly around the bobbin shaft 27 is formed (see FIG. 3B). Then, when the lower thread 13 is further wound up, the lower thread 1 gradually increases.
3 is no longer guided by the rib 31 and the lower thread 13
When is wound around the bobbin 7 by a specified amount, it is wound parallel to the bobbin shaft 27 as shown in FIG. As shown in FIG. 3, the bobbin 7 is formed in a vertically symmetrical shape, so when setting the bobbin 7 on the bobbin mounting shaft 11, it is necessary to pay attention to the mounting direction of the bobbin 7. There is no.

Next, the positional relationship between the sensor 23 for detecting the lower thread 13 wound around the bobbin 7 and the above-described "thread pool" will be described in detail with reference to FIG.

FIG. 4 is a view showing a state in which the bobbin 7 is stored in the shuttle 5 described above. FIG. 4 (A) is an upper plan view thereof, and FIG. 4 (B) is a side sectional view thereof. Things.
As described above, the lower thread 1 is connected via the bobbin mounting shaft 11.
The bobbin 7 around which the coil 3 is wound is set in the shuttle 5 by moving the bobbin 7 parallel to the bobbin 7 without removing the bobbin 7 from the bobbin mounting shaft 11.

As shown in FIG. 4, the sensor 23 is wound around the bobbin 7 near the bobbin shaft 27 (see FIG. 4A) and near the flange 29 (see FIG. 4B). The thread 13 is arranged at a position where the thread 13 can be detected, thereby forming a “thread pool” formed via the spiral rib 31.
(See FIG. 3 (B)). As described above, the “thread pool” formed via the bobbin mounting shaft 11 and the detection position of the lower thread 13 detected via the sensor 23 are different from the bobbin mounting shaft 1 described above.
According to the procedure for moving from 1 to the shuttle 5, the configuration is the same.

The sensor 23 used for detecting the lower thread 13 is an optical sensor which can determine the presence or absence of the lower thread 13 which is an object to be detected by irradiating and irradiating the detection light 33, and is wound around the bobbin 7. When the winding amount of the turned lower thread 13 is large, the detection light 33 is blocked by the lower thread 13,
When the amount of winding of the lower thread 13 wound around the bobbin 7 decreases and the amount of winding of the lower thread 13 reaches the "thread pool" amount, the detection light 3
3 is arranged to be incident on the sensor 23. As described above, when the detection light 33 is detected to be incident via the sensor 23, it is notified to the sewing manufacturer via the liquid crystal display 9 that the bobbin thread 13 wound around the bobbin 7 is about to disappear. By informing (see FIG. 2 (A)), a state where sewing is impossible due to the absence of the lower thread 13 or
It is possible to prevent a state in which a defective product is manufactured in advance, and it is possible to use the lower thread 13 immediately before it disappears.

As described above, the portion of the "thread pool" (see FIG. 3B) formed through the spiral rib 31 provided on the peripheral surface of the bobbin shaft 27 is detected by the sensor 23. Therefore, it is possible to detect the time immediately before the lower thread 13 is lost, and to efficiently use the lower thread 13 immediately before the lower thread 13 is lost, as compared with the case where the lower thread 13 is wound evenly around the bobbin shaft 27. be able to.

Further, by setting the bobbin 7 on the bobbin mounting shaft 11 and rotating the bobbin shaft 27 in the direction in which the bobbin thread 13 is wound, it is possible to form the above-mentioned "thread pool". Therefore, the sewing manufacturer does not need to pay special attention to form the "thread pool".

Further, since the rib 31 for guiding the lower thread 13 so as to form the "thread pool" is spirally formed on the peripheral surface of the bobbin shaft 27, an excessive amount of It is possible to smoothly form the "pool" without giving any resistance.

Further, since the rib 31 is formed integrally with the bobbin shaft 27, it is easy to manufacture, and there is no danger of causing a mounting error or the like that occurs when the rib 31 is mounted on the bobbin shaft 27.

Further, since the rib 31 is formed continuously on the peripheral surface of the bobbin shaft 27, the lower thread 13 is not caught or entangled when the lower thread 13 is guided.

It should be noted that the present invention is not limited to the above-described embodiment, and various improvements and modifications can be made without departing from the spirit of the present invention. For example, in the present embodiment, an example in which the bobbin shaft 27 when the bobbin 7 is stored in the shuttle 5 and the bobbin shaft 27 when the bobbin 7 is arranged on the bobbin mounting shaft 11 has a substantially parallel relationship. Although shown, it is a matter of course that the present invention is not limited to this, and the same effect can be obtained even in the case of a crossed or twisted positional relationship.

In the above embodiment, the bobbin shaft 27
The spiral rib 31 protruding from the peripheral surface of the bobbin shaft 27 is formed continuously and integrally on the peripheral surface of the bobbin shaft 27. However, the present invention is not limited to this.
If it is within the range that does not give excessive resistance when inducing 3,
It goes without saying that the same effect can be obtained even if the ribs 31 formed discontinuously or formed separately from the bobbin shaft 27 are arranged on the peripheral surface of the bobbin shaft 27.

Further, in the above embodiment, the bobbin shaft 2
Although the example in which the "thread pool" formed on the peripheral surface of the bobbin 7 is formed near the flange 29 has been shown, the present invention is not limited to this, and the "thread pool" is formed at one location on the peripheral surface of the bobbin shaft 27. As shown in FIG. 5, a discontinuous rib 35 for guiding the lower thread 13 is provided at the center of the bobbin shaft 27,
7 (see FIG. 5A), the bobbin thread 13 is wound while forming a "thread pool" near the center of the bobbin shaft 27 (see FIG. 5B) (see FIG. 5B). Needless to say, a similar effect can be obtained.

In the above-described embodiment, an example in which the present invention is applied to the bobbin 7 around which the lower thread 13 is wound has been described.
Of course, the present invention is not limited to this, and it goes without saying that the same effect can be obtained by applying the present invention to a yarn frame around which the upper thread 15 is wound.

[0050]

As described above, according to the yarn winding roll of the first aspect, the yarn is wound sequentially from a predetermined position on the peripheral surface of the yarn winding shaft, and the yarn is wound on the peripheral surface of the yarn winding shaft. "Thread pools" are formed at predetermined positions. Therefore, when performing sewing with a sewing machine, the "thread pool" wound at a predetermined position on the peripheral surface of the thread take-up shaft is used last. By arranging a sensor capable of detecting the amount of winding of the "thread pool" wound at the predetermined position, it is possible to accurately detect the time immediately before the yarn runs out, which is very convenient. In addition, when forming a "pool", simply rotate the winding shaft in the direction in which the yarn is wound,
Since the "thread pool" can be formed, the sewing manufacturer does not need to pay special attention and is very easy to use.

Further, according to the yarn winding method of the yarn winding roll of the present invention, the yarn is wound in order from a predetermined position on the peripheral surface of the yarn winding shaft portion, and the yarn is wound at a predetermined position on the peripheral surface of the yarn winding shaft portion. A "pool" is formed at the bottom. Therefore, when performing sewing with a sewing machine, the "thread pool" wound at a predetermined position on the peripheral surface of the thread take-up shaft is used last. By arranging a sensor capable of detecting the amount of winding of the "thread pool" wound at the predetermined position, it is possible to accurately detect the time immediately before the yarn runs out, which is very convenient. In addition, when forming a "pile-up", simply rotate the take-up shaft in the direction in which the yarn is wound up.
Therefore, the sewing manufacturer does not need to pay special attention and is very easy to use.

Further, according to the sewing machine provided with the yarn winding roll according to the third aspect, the remaining amount of the lower thread is detected for the lastly used "thread pool" on the peripheral surface of the yarn winding shaft. This is very convenient because it is possible to accurately detect the point immediately before disappearance, and to use the yarn without waste.

Further, according to the thread winding roll, the thread winding method of the thread winding roll, or the sewing machine provided with the thread winding roll, the thread winding roll according to any one of claims 1 to 3 is used. In addition to the effect of the yarn winding method or the sewing machine having the yarn winding roll, since the yarn guiding portion is spirally arranged on the peripheral surface of the yarn winding shaft portion, the direction in which the yarn is wound around the yarn winding shaft portion. By rotating to
The yarn can be effectively guided to a predetermined position on the peripheral surface of the yarn winding shaft portion.
Since there is no step on the peripheral surface of the yarn winding shaft portion as in 780, the winding amount of the yarn is reduced by increasing the diameter of the shaft, and the strength is deteriorated by reducing the diameter of the shaft. It is very convenient.

Further, according to the bobbin roll, the bobbin winding method of the bobbin roll and the sewing machine provided with the bobbin roll, the bobbin roll according to any one of claims 1 to 4, In addition to the yarn winding method, or the effect of the sewing machine provided with the yarn winding roll, the yarn guiding portion further includes:
Because it is formed integrally with the yarn winding shaft, it is easy to manufacture,
Moreover, since there is no mounting error or the like, it is very convenient.

According to the bobbin roll, the bobbin winding method of the bobbin roll and the sewing machine provided with the bobbin roll, the bobbin roll according to any one of claims 1 to 5, In addition to the effect of the yarn winding method or the sewing machine having the yarn winding roll, a flange for regulating the winding position of the yarn within a predetermined range is provided on the peripheral surface of the yarn winding shaft, so that the winding is performed around the yarn winding shaft. This is very convenient because the yarn to be wound is not wound beyond a predetermined range on the peripheral surface of the yarn winding shaft.

Further, according to the bobbin roll, the bobbin winding method of the bobbin roll and the sewing machine provided with the bobbin roll, the bobbin roll according to any one of claims 1 to 6, In addition to the effect of the yarn winding method or the sewing machine provided with the yarn winding roll, the yarn guiding portion is formed continuously on the peripheral surface of the yarn winding shaft portion, so that the yarn is caught or entangled in the yarn guiding portion. It is smoothly wound around the peripheral surface of the yarn winding shaft portion without being lost, which is very convenient.

According to the sewing machine having the wound roll according to the eighth aspect, in addition to the effect of the sewing machine having the wound roll according to any one of the third to seventh aspects, an optical sensor is used as a sensor. Therefore, compared with the case where the yarn to be detected is detected by a contact type sensor, the range to be detected is narrower, and the yarn of the "pool" can be detected with high accuracy, so that the time immediately before the yarn runs out can be detected more accurately. It is possible to do.

Further, according to the sewing machine having the wound roll according to the ninth aspect, in addition to the effect of the sewing machine having the wound roll according to any one of the third to eighth aspects,
An end of the yarn winding shaft portion facing the yarn winding arrangement portion when the yarn winding roll is arranged on the yarn winding arrangement portion, and a yarn winding facing the yarn operation arrangement portion when the yarn winding roll is arranged on the yarn winding arrangement portion. Since the end of the shaft portion is the same end, when the sewing manufacturer arranges the bobbin roll arranged in the bobbin winding arrangement section in the bobbin winding arrangement section, the bobbin roll is arranged in the bobbin winding arrangement section. By arranging the spool in the thread take-out arrangement section while holding the spool in the hand, the position of the `` thread pool '' formed on the peripheral surface of the spooling shaft can be changed to the desired position without changing the spool. It can be set and is very easy to use.

According to the tenth aspect of the present invention, in addition to the effect of the sewing machine having the bobbin roll according to the ninth aspect, the yarn winding shaft for arranging the bobbin roll in the bobbin winding arrangement portion is also provided. And the thread take-up shaft when the bobbin roll is arranged on the thread take-out arrangement section is in a substantially parallel relationship, so that the sewing manufacturer picks up the bobbin roll arranged in the bobbin winding arrangement section. By keeping the position of the bobbin roll parallel, without changing the direction of the bobbin roll, it becomes possible to arrange the bobbin roll in the yarn handling arrangement section, and the usability is further improved.

[Brief description of the drawings]

FIG. 1 is an external front view showing a sewing machine according to the present embodiment.

FIG. 2 is a diagram showing an example of a message displayed on a liquid crystal display.

FIG. 3 is a schematic side sectional view of a bobbin.

FIG. 4 is a diagram showing a positional relationship between a bobbin and a sensor.

FIG. 5 is a schematic side sectional view of a bobbin in another embodiment.

FIG. 6 is a schematic sectional side view of a conventional bobbin.

FIG. 7 is a diagram showing a positional relationship between a conventional bobbin and a sensor.

[Explanation of symbols]

 Reference Signs List 1 sewing machine 5 shuttle 7 bobbin 9 liquid crystal display 11 bobbin mounting shaft 13 lower thread 15 upper thread 23 sensor 27 bobbin shaft 29 flange 31 rib 33 detection light

Claims (10)

[Claims] 1. A bobbin roll comprising: a yarn winding shaft capable of winding a yarn; and a yarn guiding portion protrudingly arranged on a peripheral surface of the yarn winding shaft, wherein the yarn guiding portion includes a yarn winding shaft. A yarn winding roll characterized in that when rotating in a direction in which the yarn is wound, a contacting yarn is guided to a predetermined position on a peripheral surface of a yarn winding shaft. 2. A yarn winding method for a yarn winding roll, comprising: a yarn winding shaft capable of winding a yarn; and a yarn guiding portion protruding from a peripheral surface of the yarn winding shaft. A yarn winding method for a yarn winding roll, characterized in that when rotating in a yarn winding direction, a yarn abutting on the yarn guiding portion is wound while being guided to a predetermined position on a peripheral surface of a yarn winding shaft. 3. A yarn winding shaft portion capable of winding a yarn, and a yarn winding protrudingly arranged on a peripheral surface of the yarn winding shaft portion, the yarn abutting when the yarn winding shaft portion rotates in a direction of winding the yarn. A bobbin roll provided with a bobbin guiding portion for guiding the bobbin roll to a predetermined position on the peripheral surface of the take-up shaft portion; A sewing machine provided with a bobbin roll, wherein the bobbin roll includes a sensor provided in the vicinity of the projecting portion and capable of detecting the bobbin wound at a predetermined position on the peripheral surface of the bobbin shaft via the bobbin guiding section. . 4. The bobbin roll according to claim 1, wherein the yarn guiding section is spirally arranged on a peripheral surface of the bobbin shaft. A method of winding a roll, or a sewing machine provided with a roll. 5. The yarn guide portion according to claim 1, wherein the yarn guide portion is formed integrally with the yarn winding shaft portion.
A sewing machine provided with the bobbin roll, the bobbin winding method of the bobbin roll, or the bobbin roll. 6. A flange for regulating a winding position of a yarn within a predetermined range on at least a side of a peripheral surface of the yarn winding shaft portion where a yarn is guided through a yarn guiding portion. A sewing machine provided with the bobbin roll according to any one of claims 1 to 5, a bobbin winding method, or a bobbin roll. 7. The bobbin roll according to claim 1, wherein the bobbin guide is formed continuously on a peripheral surface of the bobbin shaft. Or a sewing machine provided with a bobbin roll. 8. The sewing machine according to claim 3, wherein the sensor is an optical sensor. 9. A bobbin winding arrangement portion for arranging a bobbin roll when winding a yarn around the bobbin roll, and a bobbin facing the bobbin winding arrangement portion when a bobbin roll is arranged at the bobbin winding arrangement portion. The end portion of the winding shaft portion and the end portion of the yarn winding shaft portion facing the yarn winding arrangement portion when the yarn winding roll is arranged on the yarn winding arrangement portion are the same end portion. A sewing machine comprising the wound roll according to any one of claims 3 to 8. 10. A yarn winding shaft for disposing a bobbin roll on the yarn winding disposing portion and a yarn winding shaft for disposing a bobbin roll on the yarn take-out disposing portion are substantially parallel to each other. A sewing machine provided with the peg roll according to claim 9.