KR101659930B1 - Apparatus and method for detecting remaining thread of a sewingmachine - Google Patents

Apparatus and method for detecting remaining thread of a sewingmachine Download PDF

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Publication number
KR101659930B1
KR101659930B1 KR1020150163706A KR20150163706A KR101659930B1 KR 101659930 B1 KR101659930 B1 KR 101659930B1 KR 1020150163706 A KR1020150163706 A KR 1020150163706A KR 20150163706 A KR20150163706 A KR 20150163706A KR 101659930 B1 KR101659930 B1 KR 101659930B1
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South Korea
Prior art keywords
bobbin
lower thread
length
light
thread
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KR1020150163706A
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Korean (ko)
Inventor
신용식
서동영
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주)돌핀코리아
서동영
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    • D—TEXTILES; PAPER
    • D05—SEWING; EMBROIDERING; TUFTING
    • D05B—SEWING
    • D05B59/00—Applications of bobbin-winding or -changing devices; Indicating or control devices associated therewith
    • D05B59/02—Devices for determining or indicating the length of thread still on the bobbin
    • D—TEXTILES; PAPER
    • D05—SEWING; EMBROIDERING; TUFTING
    • D05B—SEWING
    • D05B59/00—Applications of bobbin-winding or -changing devices; Indicating or control devices associated therewith

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Sewing Machines And Sewing (AREA)

Abstract

The present invention relates to an apparatus and a method for confirming the remaining length of a bottom thread wound on a bottom bobbin during a sewing work, more specifically, to a sewing work by winding a predetermined amount of bottom thread necessary for a sewing work on a bottom thread bobbin, In the case of the sewing machine, the sewing machine design accepts the stitch length of the stitch length by the sewing design in advance. And the stitch number of the worker to check the information on the lower thread to be used in accordance with the work amount and to calculate the lower thread in the number of revolutions of the sewing machine as the work progresses, thereby informing the worker in advance of the required amount and the exhaustion degree of the lower thread.
To this end, a sweat length setting device of a general sewing machine of the present invention has a cylindrical shape and includes a stitch length setting lever for setting a stitch length per one stitch, a wheel having a slit formed on an outer circumference, A wheel rotation detecting sensor for measuring the amount of optical signal pulses received and reflected from the irradiated light, and a controller for controlling the swing length per sweep set by the sweat length setting lever and the wheel rotation sensor And a control unit for calculating the consumable length of the lower thread from the number of rotations of the wheel calculated by the received information. A computer sewing machine that accommodates the sewing design refers to the sewing designed design in advance and sets and uses the data.

Figure R1020150163706

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sewing machine,

The present invention relates to an apparatus and a method for confirming the remaining length of a bottom thread wound on a bottom bobbin during a sewing work, more specifically, to a sewing work by winding a predetermined amount of bottom thread necessary for a sewing work on a bottom thread bobbin, In the case of the sewing machine, the sewing machine design accepts the stitch length of the stitch length by the sewing design in advance. And the stitch number of the worker to check the information on the lower thread to be used in accordance with the work amount and to calculate the lower thread in the number of revolutions of the sewing machine as the work progresses, thereby informing the worker in advance of the required amount and the exhaustion degree of the lower thread.

[0002] A sewing machine is a machine that performs various types of sewing operations on a textile fabric using yarns and needles.

Generally, in order to perform sewing work on a sewing machine, an upper thread and a lower thread are required, and an upper thread single thread detection detects the pulling action of the thread from the needle when sewing the thread. In contrast, the lower thread inserted into the hook in the state of being wound on the lower thread bobbin detects no thread or no thread by means of not sewing or detecting the looseness of the upper thread.

The upper thread can be sewn for a long time without replacing the thread because the thread is wound up with a lot of yarn wound up. However, the lower thread is often inserted into the hook while being wound on the small thread bobbin.

In addition, if the remaining length of the lower thread wound on the lower thread bobbin during the work is not wound up enough to perform the sewing operation for one sewing product, the supply of the lower thread is interrupted during the sewing operation, do. If the supply of the thread supply is interrupted during the sewing operation, the product becomes defective. In addition, the worker must check the amount of the lower thread wound on the bobbin bobbin from time to time to prevent the product from being checked for sewing defects. If the remaining length of the wound bobbin thread is unknown, discard the lower thread wound on the bobbin thread bobbin do.

 Korean Unexamined Patent Publication No. 2012-0048480 proposes a method in which the amount of loosening of the upper thread is regarded as the amount of loosening of the lower thread and the amount of the lower thread wound on the lower thread bobbin is calculated. However, the above-described method is possible when the lower thread is loosened in response to loosening of the upper thread. However, in a normal work process, there is a case where the operator pulls and pulls the upper thread regardless of loosening of the lower thread. In such a case, an error occurs when calculating the amount of loosening of the lower thread due to the amount of loosening of the upper thread. Also, since there is no device to detect the rotation of the bobbin bobbin, there is no way to identify the bobbin thread in the middle of the operation.

Korean Patent Laid-Open No. 10-2006-0093501 also discloses that the number of revolutions of the lower thread bobbin wound on the lower thread bobbin is saved regardless of the length of the lower thread thread wound on the lower thread bobbin, It informs. Therefore, Korean Patent Laid-Open No. 10-2006-0093501 winds the lower thread to the lower thread bobbin without regard to the length of the lower thread required for sewing one sewing product. In particular, when sewing a plurality of sewing materials having a short sewing length by using one bobbin bobbin, it is assumed that the bobbin thread is wound on the bobbin bobbin without considering the length of the bobbin thread required for the sewing work. In this case, the sewing thread of the sewing machine may be exhausted during the final sewing operation in a state where the remaining amount of the bottom thread used for the final sewing operation is not known during the sewing work of the sewing thread having a small amount of lower thread consumption. If the bobbin thread is exhausted during sewing, the bobbin thread should be replaced. In this case, since the bobbin thread is changed during the sewing operation of one sewing product, co-occurrence or re-stitching occurs.

Therefore, in addition to the above-described method, it is required to accurately measure the amount of the bottom thread required for the sewing work and notify the worker.

Korean Patent Laid-Open No. 10-2012-0048480 (entitled " Korean Patent Laid-Open No. 10-2006-0093501 (entitled "

A problem to be solved by the present invention is to propose a method of calculating a required amount of a bottom thread wound on a bottom thread bobbin of a sewing machine during sewing work.

Another problem to be solved by the present invention is to propose a method of calculating the remaining length of the lower thread wound on the lower thread bobbin of the sewing machine during sewing work and providing the operator with information on the remaining thread length if necessary.

Another problem to be solved by the present invention is to propose a method of winding the lower thread to the lower thread bobbin by a worker in consideration of the length of the lower thread required for the sewing work.

To this end, the apparatus for calculating the remaining thread length of a sewing machine of the present invention has a cylindrical shape and includes a stitch length setting lever for setting the stitch length per one hand, a wheel having a slit formed on the outer circumference, A wheel rotation detecting sensor for measuring the amount of optical signal pulses received and reflected from the irradiated light, and a controller for controlling the swing length per sweep set by the sweat length setting lever and the wheel rotation sensor And a controller for calculating the consumable length of the lower thread from the number of rotations of the wheel calculated by the received information.

The remaining thread length calculating device of the present invention calculates and displays the remaining thread length of the bottom thread so that when the remaining thread length is less than or equal to the length set in the thread threading operation, As described above, the single yarn and the remaining length of the lower thread are displayed on the outside, and if necessary, a warning message is output to improve the sewing quality and improve the productivity.

Further, the operator can use the lower thread bobbin by winding the lower thread thread by the length required for the sewing work, thereby preventing unnecessary waste of the lower thread.

1 is a view showing a configuration of a sewing machine according to an embodiment of the present invention.
2 to 3 are views showing the construction of a bobbin winder constituting a sewing machine according to an embodiment of the present invention.
FIG. 4 illustrates an operating plate of a bobbin winder according to an embodiment of the present invention.
FIG. 5 illustrates an apparatus for detecting a single yarn end and a residual yarn wound on a bottom yarn bobbin according to an embodiment of the present invention.
FIG. 6 illustrates a computer sewing machine according to an embodiment of the present invention.
FIG. 7 is a flowchart illustrating an operation performed by a controller constituting a bobbin winder according to an exemplary embodiment of the present invention.

BRIEF DESCRIPTION OF THE DRAWINGS The foregoing and further aspects of the present invention will become more apparent from the following detailed description of preferred embodiments with reference to the accompanying drawings. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Reference will now be made in detail to the embodiments of the present invention, examples of which are illustrated in the accompanying drawings.

1 is a view showing a configuration of a sewing machine according to an embodiment of the present invention. Hereinafter, a configuration of a sewing machine according to an embodiment of the present invention will be described in detail with reference to FIG.

1, the sewing machine 10 includes a bobbin winder 200, a stitch length setting lever 104, a wheel 100, a wheel rotation detection sensor 102, and a bobbin bobbin rotation detection sensor 300. Of course, it is obvious that other configurations other than the above-described configuration may be included in the sewing machine proposed in the present invention.

Wind the lower thread winder (200) to the lower thread bobbin. The details of the bobbin winder 200 will be described in detail with reference to FIGS. 2 to 3. FIG.

The stitch length setting lever 104 is formed in a columnar shape having a predetermined thickness, and the length of one sweat is displayed on a columnar shape. Fig. 1 shows a stitch length setting lever.

1, 0 to 6 are displayed on the stitch length setting lever 104, and the length of the sweat per hand can be adjusted by rotating the sweat length setting lever 104. [ For example, when the stitch length per stitch is set to 3, the stitch length per stitch sewn to the stitched product is 3 mm. As described above, the length of the stitch per one stitch can be adjusted or set using the stitch length setting lever 104. Of course, when there is no separate stitch length setting lever, the operator can set the length of one stitch using a separate input means. In addition, the length of one sweat can be set in various ways.

The wheel 100 is formed on one side of the sewing machine 10. When the wheel 100 makes one rotation, the upper thread needle also moves up and down one time. That is, the amount of rotation of the wheel and the number of times of movement of the upper needle in the up and down direction correspond to each other. More specifically, when the wheel is rotated twice, the upper thread needle moves up and down twice, and the sewing step of the sewing product is performed by the two-time movement of the upper thread needle. In accordance with the present invention, a slit is formed on the outer circumference of the wheel, and the slit is also rotated by the rotation of the wheel.

The rotation detecting sensor 102 is located around the wheel including the side or bottom of the wheel, and senses the rotation of the slit formed on the wheel. To this end, the rotation detecting sensor 102 irradiates light onto the outer circumference of the wheel 100, and calculates the amount of rotation of the wheel using the amount of optical signal pulse reflected by the irradiated light. That is, the wheel 100 has a slit on the outer circumference, and the optical signal pulse amount reflected by the formed slit is different. Thus, the rotation sensor 102 measures the amount of rotation of the wheel using a change in the amount of optical signal pulses that varies.

More specifically, the sewing operation is carried out with the lower thread bobbin wound around the lower thread pulled into the hook. Specifically, the lower thread bobbin is inserted into the lower thread bobbin case, and the lower thread bobbin case into which the lower thread bobbin is inserted is attached to the sewing machine while being pulled into the hook.

The control unit (or control board) constituting the bobbin winder 200 calculates the length of the consumed bobbin thread in real time using the length of one sweat set on the stitch length setting lever and the number of rotations of the wheel provided from the wheel rotation sensor . The control unit calculates the remaining length of the lower thread wound on the lower thread bobbin by using the length of the lower thread wound on the lower thread bobbin and the consumed thread length. If the calculated remaining thread length is less than the set value (set length) .

The remaining length of the lower thread wound on the bobbin bobbin is indicated by using a display separately formed on the bobbin winder 200. If the remaining length of the lower thread is insufficient for performing the sewing process for one sewing product A warning message can be output to the outside so that the operator can recognize it.

Thus, the present invention uses the bobbin winder to wind the bobbin thread to the bobbin bobbin, calculate the remaining length of the bobbin thread wound, and mark the bobbin as the outside. Particularly, in the present invention, the length of the lower thread consumed in the work is calculated by using the length of one sweat set by the stitch length setting lever and the number of rotation of the wheel, and by using the calculated lower thread length and the first wound lower thread length The remaining length of the bobbin wound on the bobbin bobbin is calculated.

The bobbin bobbin rotation sensor 300 senses the amount of rotation of the bobbin bobbin inserted into the hook. The operation of the lower thread bobbin rotation detection sensor 200 will be described later.

FIGS. 2 and 3 are views showing the construction of a bobbin winder constituting a sewing machine according to an embodiment of the present invention. Hereinafter, the construction of a bobbin winder according to an embodiment of the present invention will be described in detail with reference to FIG. 2 and FIG.

2 is a front view of the bobbin bobbin winder, and Fig. 3 is a top view of the bobbin winder.

2 to 3, the lower thread winder 200 for winding the lower thread on the lower thread bobbin includes a lower thread bobbin, a lower thread bobbin thread fastening member, a bobbin motor, a lower thread bobbin rotation detecting sensor, a rotating member, Module, a first tension member, a second tension member, and an operating plate. Of course, other configurations other than the above-described configuration may be included in the bobbin winder proposed in the present invention.

The first tension member 202 receives the lower thread from the lower thread-wound member (failure) and supplies the lower thread to the rotary member 204. The first tension member (202) maintains the tension of the lower thread supplied to the rotary member (204).

The rotary member 204 receives the lower thread from the first tension member 202 and supplies the lower thread to the second tension member 206. When the lower thread supplied from the first tension member 202 is supplied to the second tension member 206, the rotary member 204 also rotates in accordance with the lower thread supply. To this end, the rotating member 204 preferably keeps the lower thread wound at least twice. When the lower thread is wound on the rotary member 204 at least twice, the rotary member 204 is rotated by the frictional force between the lower thread and the rotary member when the wound lower thread is supplied to the second tension member. The second tension member 206 is also made to maintain the tension of the lower thread in the same manner as the first tension member 202.

A part of the outer periphery 204a is cut on the other side of the rotary member 204. [ In other words, one side of the rotary member 204 is formed with a lower thread winding portion around which a closed chamber supplied from the first tension member 202 is wound, and a part of the outer peripheral edge 204a is cut at the other side. The outer peripheral edge 204a of the rotary member also rotates by the rotation of the rotary member 204a.

The rotation member rotation detection sensor 208 calculates the rotation amount of the rotation member 204. [ A part of the outer peripheral edge 204a of the other side of the rotary member is cut as described above and the rotation amount of the rotary member 204 is calculated by sensing the cut outer peripheral edge 204a. To this end, the rotation member rotation detecting sensor 208 includes a light irradiating part for irradiating light to the outer peripheral edge 204a of the other side of the rotating member and a light receiving part for receiving the irradiated light. The light irradiated from the light irradiating unit is irradiated to the outer peripheral edge 204a of the other side of the rotating member and the light irradiated to the other outer peripheral edge 204a of the rotating member is transmitted to the light receiving unit. Of course, when the light irradiated from the light irradiation part is irradiated to the other outer periphery 204a of the rotating member which is not cut, the irradiated light is not transmitted to the light receiving part. The rotary member rotation sensor 208 calculates the length of the lower thread by the amount of rotation of the rotary member 204 using whether or not the irradiated light is transmitted to the light receiving unit.

The second tension member 206 feeds the lower thread supplied from the rotary member 204 to the lower thread bobbin 220. The lower thread bobbin 220 is fastened to the lower thread bobbin fastening portion 218 and the lower thread bobbin fastening portion 218 is fastened to the bobbin motor 210. It is apparent that the lower thread bobbin fastening portion 218 and the bobbin motor 210 may be integrally formed. The bobbin motor 210 also rotates the bobbin bobbin coupling portion 218 and the bobbin bobbin coupling portion 218 and the bobbin bobbin 220. When the bobbin bobbin 220 is rotated, the rotating member 204 also rotates to supply the bobbin with the bobbin bobbin 220. That is, the rotary member 204 is rotated by the rotation of the bobbin motor 210, and the lower thread supplied to the lower thread bobbin 220 by the rotation of the rotary member 204 is wound on the lower thread bobbin 220.

As described above, the present invention uses the bobbin winder 200 to wind the bobbin thread to the bobbin bobbin 220. In other words, the operator operates the bobbin motor 210 constituting the bobbin winder with the amount of the bobbin thread to be wound around the bobbin bobbin 220 set. When the bobbin motor 210 is rotated by driving, the lower thread is wound on the lower thread bobbin fastened to the lower thread bobbin fastening portion 210. As described above, in the process of supplying the lower thread to the lower thread bobbin, the rotary member 204 is rotated, and the rotation member rotation detecting sensor 208 calculates the length of the lower thread by the rotation amount of the rotary member 204.

The bobbin winder 200 stores the circumferential length of the rotary member 204 around which the bobbin thread is wound and real time monitors the length of the bobbin supplied to the bobbin bobbin 220 using the bobbin. The bobbin winder 200 stops the bobbin motor 210 when the bobbin winding length set by the operator is equal to the bobbin length supplied to the bobbin bobbin. The bobbin winder 200 operates the actuator 214 and when the actuator 214 is operated, the brake module 216 connected to the actuator 214 is brought into close contact with the rotation axis extending from the bobbin motor 210. When the brake module 216 is brought into close contact with the rotation shaft extending from the bobbin motor 210, the bobbin motor 210 is stopped by the frictional force. At the same time, the power supply to the bobbin motor 210 is cut off.

When the power transmitted to the bobbin motor is cut off to stop the operation of the existing bobbin motor, the bobbin motor rotates for a certain time due to inertia. When the bobbin motor is rotated for a predetermined time, the worker can not wind the lower thread of the desired length to the bobbin bobbin.

To this end, the present invention supplies power to the actuator 214 when the winding length of the chamber set by the operator is equal to the length of the lower thread supplied to the lower thread bobbin. When power is supplied to the actuator 214, the actuator 214 is driven so that the brake module 216 is brought into close contact with the rotation axis extending from the bobbin motor to stop the rotation of the bobbin motor.

The bobbin motor rotation detection sensor 212 calculates the amount of rotation of the bobbin motor 210. The rotation amount of the bobbin motor 210 corresponds to the rotation amount of the bobbin, and therefore, the rotation of the bobbin can be calculated by calculating the rotation amount of the bobbin motor 210. [

To this end, the bobbin motor rotation detection sensor 212 includes a light irradiating part for irradiating light to the outer periphery 210a of the rotary shaft extending from the bobbin motor 210 and a light receiving part for receiving the irradiated light. The light irradiated from the light irradiating unit is irradiated to the outer peripheral edge 210a of the rotating shaft extending from the bobbin motor 210_ and the light radiated to the outer peripheral edge 210a of the rotating shaft extending from the cut bobbin motor 210, The irradiated light is not transmitted to the light receiving unit when the light irradiated from the light irradiating unit is irradiated to the outer peripheral edge 210a of the rotating shaft extending from the uncut bobbin motor 210. As described above, The detection sensor 212 calculates the amount of rotation of the bobbin motor 210 based on whether the irradiated light is transmitted to the light receiving unit.

The operation panel 222 includes a plurality of buttons, and the operator operates buttons to input necessary information to the bobbin winder. That is, the operator sets the length of the lower thread to be wound around the bobbin by using the button, or sets the number of rotations of the bobbin motor 210. In addition, the button is used to instruct the driving of the bobbin winder. The control panel 222 includes a display and displays information entered by the operator or the current status of the bobbin winder and other necessary information. This will be described later.

As described above, the present invention uses a bobbin winder to wind the bobbin to the bobbin bobbin. More specifically, after the operator sets the amount of the bobbin to be wound on the bobbin bobbin, the bobbin motor of the bobbin winder is driven. The bobbin motor constituting the bobbin winder is rotated, and the bobbin winder is wound around the bobbin bobbin fastened to the bobbin fastening portion by the rotation of the bobbin motor. In addition, the rotary member rotates while the lower thread is supplied to the lower thread bobbin, and the rotary member rotation detection sensor measures the rotation amount of the rotary member.

The bobbin winder stores the circumferential length of the rotating member around which the bobbin thread is wound, and calculates the length of the bobbin thread supplied to the bobbin in the sealed chamber in real time. The bobbin winder stops the operation of the bobbin motor if the bobbin winding length set by the operator and the bobbin thread length supplied to the bobbin bobbin are the same. In the present invention, the lower thread is wound on the lower thread bobbin so as to be the length of the lower thread set by the operator through the above process.

More specifically, the operator calculates the length of the lower thread used in one sewing process, and sets the calculated length of the lower thread to be wound around the lower thread bobbin. For example, assuming that the length of the lower thread used in one sewing process is 50 cm, if the operator wishes to perform a sewing process on two sewing products using one lower thread bobbin, do. As described above, the bobbin winder proposed in the present invention has an advantage that the length of the bobbin thread required by the operator can be efficiently wound on the bobbin bobbin.

In addition, the lower thread winder can set the number of times the lower thread bobbin is wound on the lower thread instead of setting the length of the lower thread wound on the thread bobbin. That is, if the number of revolutions of the bobbin motor is set, the bobbin winder controls the bobbin motor to be driven by the set number of times. As described above, according to the present invention, the length of the lower thread wound on the lower thread bobbin can be set or the number of rotation of the lower thread bobbin to which the lower thread is wound can be set.

FIG. 4 illustrates an operating plate of a bobbin winder according to an embodiment of the present invention. Hereinafter, an operating plate of a bobbin winder according to an embodiment of the present invention will be described in detail with reference to FIG. As described above, the operation panel includes a display for displaying necessary information.

4, the operation plate 222 is provided with a digital bobbin winder, which is an operation part for winding the lower thread to the lower thread bobbin by using the lower thread winder, and a bobbin thread sensor for displaying information about the lower thread wound on the lower thread bobbin And a detection window.

The digital bobbin winder includes an LED, a start button, a stop button, a bobbin display, a set button, a mode select button, and a navigation button. The LED indicates whether the bobbin winder is normal or not, and the start button indicates the operation of the bobbin winder. The stop button indicates the bobbin winder stop operation. The bobbin display section displays the length of the bobbin thread to be wound on the bobbin bobbin set by the user, the remaining length of the bobbin thread required to be wound, and the like.

The setting button sets the length of the bobbin to be wound around the bobbin bobbin, and if necessary, sets the necessary information using the navigation button. In addition, you can set ① bobbin rotation speed setting, bobbin length setting ② bobbin rotation speed and bottom bobbin length setting by using setting button ③ set sewing process by setting sewing process once during sewing process.

The bobbin check detection window also includes a bobbin display section, a setting button, a navigation button, and a mode selection button.

FIG. 5 illustrates an apparatus for detecting a single yarn end and a residual yarn wound on a bottom yarn bobbin according to an embodiment of the present invention. Hereinafter, a method for detecting the single yarn endurance and the remaining amount of the bottom yarn wound on the bottom yarn bobbin according to one embodiment of the present invention will be described in detail with reference to FIG.

Referring to FIG. 5, the lower thread perforation and residual amount sensing device includes a lower thread bobbin, a lower thread bobbin case, a lower thread bobbin rotation sensor, and a hook. Of course, other configurations other than the above-described configuration may be included in the lower thread monofilament and the remaining amount sensing apparatus proposed in the present invention.

The lower thread bobbin 220 is wound around the lower thread and has slits formed on one surface of the lower thread bobbin 220 at regular intervals. That is, as shown in FIG. 5, one surface of the lower thread bobbin 220 has slits formed at regular intervals. The lower thread bobbin 220 draws out the lower thread wound around while rotating.

The lower thread bobbin case 221 is formed in a cylindrical shape having a first side opened so that the lower thread bobbin can be drawn. The bobbin bobbin 220 is inserted into the bobbin case 221 having the first side opened. The second surface of the lower thread bobbin case 221 is partially cut so that the slit formed in the lower thread bobbin is exposed from the outside. That is, the lower thread bobbin case 221 into which the lower thread bobbin 220 is inserted is partially cut so that the slit formed in the lower thread bobbin is exposed from the outside.

The hook 222 is inserted into the lower thread bobbin case 221 into which the lower thread bobbin 220 is inserted. The hook 222 is attached to the lower thread bobbin mounting opening of the sewing machine in a state in which the lower thread bobbin case 221 is pulled.

The bobbin bobbin rotation sensor 300 irradiates light to the front surface of the bobbin bobbin 220 mounted on the bobbin bobbin mount. To this end, the lower thread bobbin rotation sensor 220 irradiates light in the direction of the lower thread bobbin case 221 partially cut, and the irradiated light is irradiated to the lower thread bobbin. The light irradiated on the bobbin bobbin 220 is reflected and received by the bobbin bobbin rotation sensor 300. In particular, the irradiated light is reflected by the irradiated position of the slit formed in the bobbin bobbin, and the received optical signal pulse amount is different. For example, the light irradiated by the slit of the bobbin bobbin composed of white and black differs in the amount of optical signal pulse reflected by the case where the irradiated position is white and the irradiated position is black, Detects the amount of the optical signal pulse reflected and received.

The bobbin bobbin rotation sensor determines whether the bobbin bobbin is rotated according to whether a certain optical signal pulse amount is received or a different optical signal pulse amount is provided. That is, when the amount of optical signal received by the bottom thread bobbin rotation sensor is constant, it is determined that the bottom thread bobbin does not rotate, that is, the bottom thread is determined to be single thread. In contrast, when the amount of optical signal pulses received by the lower thread bobbin rotation sensor is different, it is determined that the lower thread bobbin rotates.

As described above, according to the present invention, the number of revolutions of the bobbin bobbin and whether the bobbin thread is single-ended or not is checked by using the optical signal pulse amount provided to the bobbin bobbin rotation detecting sensor.

6 shows a sewing machine according to another embodiment of the present invention. Fig. 6 is a computer sewing machine, and does not include a stitch length setting lever. Therefore, the computer sewing machine inputs the length of stitches per stitch using a separate input means 400, and transmits the rotation signal of the sewing machine 400a to the control computer to calculate the length of the lower thread.

FIG. 7 is a flowchart illustrating an operation performed by a controller constituting a bobbin winder according to an exemplary embodiment of the present invention. Hereinafter, an operation performed by the controller constituting the bobbin winder according to the embodiment of the present invention will be described in detail with reference to FIG.

In step S700, the control unit 224 receives and stores the length of the lower thread wound on the lower thread bobbin. As described above, when the control unit is connected to the bobbin winder, the bobbin winder is provided with the bobbin length wound on the bobbin bobbin from the bobbin winder. When the bobbin winder is not connected to the bobbin winder, The length of the lower thread is provided.

In step S710, the controller receives information on the length of one sweat set from the sweat length setting lever. As described above, the operator sets the length of one sweat using the sweat length setting lever.

In step S720, when the sewing machine is driven, the controller receives the number of rotations of the wheel in real time.

In step S730, the controller calculates the length of the lower thread consumed by the driven sewing machine using the number of rotations of the wheel provided and the length information of the sweat provided from the stitch length setting lever.

In step S740, the controller calculates the remaining length of the lower thread wound on the lower thread bobbin by using the lower thread length and the consumed lower thread length of the lower thread bobbin. If necessary, the control unit can display the calculated remaining length of the lower thread using the display unit, or output audio using the audio output unit. In addition, if the remaining length of the lower thread is equal to or shorter than the set length, the control unit can control to output a warning message to the outside.

As described above, the sewing machine control unit proposed in the present invention calculates the consumable length of the lower thread wound on the lower thread bobbin by using the set sweat length and the number of turns of the wheel, and calculates the consumed length of the lower thread, Using the length of the lower thread, the remaining length of the lower thread wound on the thread bobbin is calculated.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it will be understood by those of ordinary skill in the art that various changes in form and details may be made therein without departing from the scope of the present invention .

10: sewing machine 100: wheel
102: Wheel rotation detection sensor 104: Stitch length setting lever
200: bobbin winder 202: first tension member
204: rotating member 206: first tension member
208: rotation member rotation detecting sensor 210: bobbin motor
214: Actuator 216: Brake module
218: lower thread bobbin fastening part 220: lower thread bobbin
222: Operation panel 224: Control part \
300: Bottom thread bobbin rotation sensor 221: Bottom thread bobbin case \
222: Hook 400: Input means

Claims (11)

A stitch length setting lever having a cylindrical shape and for setting the stitch length per stitch;
A wheel that rotates to correspond to the upward and downward movement of the needle of the upper thread, and has a slit on the outer circumference;
A wheel rotation sensor that irradiates light with a slit formed on the wheel and measures an amount of optical signal pulses reflected and received in the irradiated light;
The length of wear of the lower thread is calculated from the number of rotations of the wheel calculated by the length of the stitch per needle set by the stitch length setting lever and the information provided by the wheel rotation sensor and the lower thread wound on the lower thread bobbin, And calculating the remaining length of the lower thread wound on the lower thread bobbin based on the calculated first thread length and the calculated consumed length of the lower thread. And
Includes a bobbin winder,
The bobbin winder includes:
A lower thread bobbin fastening portion to which the lower thread bobbin to which the lower thread is wound is fastened;
A bobbin motor for rotating the lower thread bobbin fastening portion;
A lower thread bobbin fastened to the lower thread bobbin fastening portion and provided with a lower thread supplied from the outside and rotated by friction force with the lower thread wound at least twice when the lower thread bobbin rotates, ;
And a rotatable member rotation detection sensor including a light irradiating part for irradiating light to the outer peripheral edge of the other side of the rotating member and a light receiving part for receiving the light irradiated from the light irradiating part,
The bobbin winder calculates the number of rotations of the rotary member by using the light reception of the light receiving unit. Wherein the length of the lower thread provided by the lower thread bobbin is calculated using the circumferential length of the wound rotary member and the calculated rotation number of the rotary member.
The apparatus of claim 1,
Wherein the remaining length of the lower thread wound on the lower thread bobbin is calculated from the initial length of the lower thread wound on the lower thread bobbin drawn in the provided hook and the calculated consumed length of the lower thread.
3. The method of claim 2,
A display unit for displaying the calculated remaining length of the lower thread;
And a warning message output unit for outputting a warning message to the outside if the calculated remaining length of the lower thread is equal to or shorter than a predetermined length.
delete The bobbin winder according to claim 1,
When the length of the lower thread provided by the lower thread bobbin reaches a predetermined length, the actuator is driven,
And a brake module connected to the actuator by the actuator is closely attached to the bobbin motor.
A bobbin fastening part for fastening the bobbin on which the lower thread is wound;
A bobbin motor for rotating the bobbin fastening part;
A rotary member provided with a bobbin and a slit on one side thereof;
And a rotating member rotation detecting sensor including a light irradiating part for irradiating light to the outer peripheral edge of the other side of the rotating member and a light receiving part for receiving the light irradiated from the light irradiating part,
The bobbin winder calculates the number of rotations of the rotary member by using the information provided from the rotary member rotation sensor and calculates the number of rotations of the rotary member based on the circumferential length of the rotary member wound around the bobbin and the calculated number of rotations of the rotary member. Calculates the length of the provided lower thread,
A rotation member rotation detecting sensor including a light irradiating part for irradiating light to the outer peripheral edge of the other side of the rotating member and a light receiving part for receiving the light irradiated from the light irradiating part;
And a bobbin motor rotation sensor including a light irradiating part for irradiating light to the outer peripheral edge of the other side of the bobbin motor and a light receiving part for receiving the light irradiated from the light irradiating part. Winder.
7. The bending machine according to claim 6,
Wherein when the length of the lower thread provided by the bobbin reaches a predetermined length, the driving of the bobbin motor is stopped.
delete A bobbin winder according to claim 6;
The bobbin having slits formed on one side surface at regular intervals;
A bobbin case having a bobbin inserted into the bobbin, the bobbin case including a cut-out portion of a side portion of the bobbin so that a part of the slit is exposed to the outside;
A hook into which the bobbin case is inserted; And
And a bobbin rotation sensor for irradiating light to the slit formed on the bobbin.
10. The bobbin rotation sensor according to claim 9,
And the amount of optical signal pulse reflected and received in the light irradiated by the slit formed on the bobbin is measured.
11. The method of claim 10,
A stitch length setting lever having a cylindrical shape and for setting the stitch length per stitch;
A wheel that rotates to correspond to the upward and downward movement of the needle of the upper thread, and has a slit on the outer circumference;
A wheel rotation sensor that irradiates light with a slit formed on the wheel and measures an amount of optical signal pulses reflected and received in the irradiated light; And
And a controller for calculating a consumable length of the lower thread from the number of rotations of the wheel calculated from the length of the stitch per needle set by the stitch length setting lever and the information provided from the wheel rotation sensor, Includes sewing machine.
KR1020150163706A 2015-11-23 2015-11-23 Apparatus and method for detecting remaining thread of a sewingmachine KR101659930B1 (en)

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CN110552121A (en) * 2019-09-10 2019-12-10 杰克缝纫机股份有限公司 Method for bottom line margin detection
CN110565284A (en) * 2019-09-20 2019-12-13 杰克缝纫机股份有限公司 roller machine, bobbin winding allowance detection device and use method thereof
CN111705441A (en) * 2020-06-18 2020-09-25 冷伟峰 Automatic trimming and automatic clearing thread trimming mechanism of sewing machine

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CN111705441A (en) * 2020-06-18 2020-09-25 冷伟峰 Automatic trimming and automatic clearing thread trimming mechanism of sewing machine

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