KR101554880B1 - A hook set with a bobbin thread detection system for sewing machines - Google Patents

Abstract

A bobbin thread supply device (1) for a sewing machine having a function of noticing a bobbin thread run-out point of the present invention comprises a hook part including an inner hook (110) and an outer hook (120), and a bobbin thread part including a U bobbin (111) and a U bobbin case (112). The outer hook (120) having the inner hook (110) installed inside to be rotated is fixed on the lower part of the sewing machine. The inner hook (110) having the U bobbin (111) which stores a bobbin thread pack (113) and the U bobbin case (112) which stores the U bobbin (111) inside coupled inside is installed inside the outer hook (120) to form a stitch on an object by being rotated around the center inside the outer hook (120) to discharge the bobbin thread to be tangled with the upper thread. A receiving part (220) of a light sensor (200) is detachably inserted into a light sensor coupler (121) coupled with the outer part of the outer hook (120). A transmitting part (210) of the light sensor (200) is located on the opposite side of the bobbin thread supply device (100) to be separated in a certain distance. Light penetrating holes (h1, h2, h3, h4) penetrate each of the U bobbin (111), U bobbin case (112), inner hook (body hook, 110), and outer hook (120) to detect light of the transmitting part of the light sensor in the receiving part of the light sensor.

Description

Technical Field [0001] The present invention relates to a sewing machine for sewing machine,

[0001] The present invention relates to a sewing machine bottom yarn feeder having a lower yarn break point advance function, and more particularly, to a sewing machine bottom yarn feeder that enables a user to exchange a lower yarn by informing a user that the amount of the bottom yarn reaches a predetermined amount, The present invention relates to a sewing machine lower thread supply apparatus having a lower thread exhaustion point advance function capable of preventing occurrence of defects in advance.

When sewing, it is very important to know the amount of the bottom thread and precisely predict the bottom thread exchanging point. However, since the lower thread of the sewing machine is attached to the bottom of the sewing machine, the user can not visually confirm the exhaustion of the lower thread during the sewing work.

In addition, since the amount of lower thread winding must be smaller than the thread winding amount of the sewing machine structure, the user must grasp the point at which the lower thread is to be exhausted beforehand and exchange the lower thread to prevent the occurrence of defective sewing do.

Failure to do so may result in loosening of the fabric, such as airbags, shoes, swimwear, etc., due to loosening of the lower thread in the suspended state, resulting in defective sewing such as detachment of the connecting parts of products requiring high tensile strength. You will face losses.

In order to prevent this, the industry is constantly making efforts to accurately identify the point of exchange of the sewing machine.

Namely, Korean Patent No. 10-1151454 of NUBOTEL Co., Ltd., registered on Feb. 23, 2012, is provided with a device for detecting the lower end of the sewing machine and a bobbin threader,

Korean Registered Patent No. 10-0471639 of Yun Gyeonggi registered on Feb.2,2, 2005 is provided with a " lower thread supply device for a sewing machine for detecting residue,

Korean Registered Patent No. 10-713589, dated Apr. 25, 2007, also discloses an apparatus and method for detecting an end point for a sewing machine using a bar code.

The lower thread supply devices provided with the lower thread residual quantity sensing device provided above contribute to some degree to grasp the state where the lower thread is exhausted.

However, it is worthwhile to inform the user of the amount of residue in advance when the sewing machine thread detection device is not in a state where the lower thread is completely exhausted, but a predetermined amount of residue remains. That is, when a certain amount of residue is left on the bobbin, it is necessary to detect the remaining amount.

Therefore, in most cases, the sewing machine thread detecting apparatuses provided in the above-described manner only grasp the state where the lower thread is completely exhausted. Therefore, although some contribution is made to grasp the state that the lower thread is completely exhausted, It is not effective to prevent the sewing failures that may occur in the future when the weft supply is interrupted in the future.

In addition, since the sewing machine thread detecting apparatuses provided in the above-mentioned methods use light reflection in the nature of light in most cases, there is a problem that a new process such as attachment of a material capable of reflecting light has to be added. Therefore, errors due to diffuse reflection occurred.

That is, Korean Patent No. 10-1151454 entitled " Apparatus for detecting the lower end of a sewing machine and a bobbin thread " (Registered on May 23, 2012, Bobbin Telecom Co., Ltd.) is provided with a bobbin core or a bobbin In addition, processes for coating and drying a conductive paint or fluorescent material by a certain length from the bobbin end must be added to the existing bobbin bobbin manufacturing process. Therefore, these methods have a problem of waste of time and manpower, resulting in cost increase, lower productivity, and additional quality problems.

In addition, Korean Patent Registration No. 10-0471639, entitled " Lower Thread Supply Device of Sewing Machine for Detecting Residues " (Registered on Feb. 2, 2005) and Korean Patent No. 10-713589, (Hereinafter referred to as "reflection plate") is attached on the bobbin core, and the bobbin core is wound on the bobbin core, and then the bobbin core is wound on the bobbin core. The methods of detecting the light reflected by the reflector that is visible when it is almost exhausted may be less accurate due to the diffuse reflection and the methods of attaching the reflector on the bobbin core are complicated and the manufacturing process is fully automated Which is not only difficult but also has a problem that the manufacturing cost is inevitably increased considerably.

Thus, the sewing machine thread detection devices provided above do not have a function of accurately grasping the point where the lower thread is exhausted during the sewing work, particularly the point of exchanging the lower thread of the bandit, so that the sewing thread can not be stuck Still has not been solved.

In addition, since the outer kiln rotates in the case of the sewing machine kiln which has been used conventionally, it is difficult to attach the sensor for detecting the light to the kiln. Even if it is difficult to attach, a device for supplying power to the sensor and a device for communicating the detected signal are wired I could not connect. Therefore, the use of wireless devices such as Bluetooth and WiFi has forced the supply cost to increase.

The applicant of the present invention has provided a 'sewing machine needling supply device' as shown in FIG. 1 through a Korean Invention Patent No. 10-1395267 registered on August 5, 2014 (hereinafter referred to as the 'invention'). The present invention relates to an improved sewing machine bobbin feeder comprising a hook portion consisting of a top and a bottom mill around a new center shaft axially moved from a conventional driving shaft of a sewing machine bobbin feeder, a lower bobbin portion composed of a U bobbin and a U bobbin case , And a top jaw of the hook portion is fixed to a lower portion of the sewing machine. As shown in Fig. 2, a inner jaw is rotatably mounted inside the outer jaw, and a U bobbin accommodating a bottom thread inside thereof and a U bobbin As shown in Fig. 3, the inner kiln rotates around the central portion and discharges the lower thread to form sweat on the rod material while being woven with the upper thread, as shown in Fig. 3 .

The U-bobbin case is connected to the inside of the body hook, and the U-bobbin case is connected to the inside of the U-bobbin case. A U bobbin accommodating a thread sleeve is accommodated.

 In addition, the 'outer surface' of the 'invention' refers to a hook housing (here, it is used in combination with an outer surface). In the hook housing, the inner kiln is rotatably mounted around the center.

The above-mentioned invention is based on the fact that the lower thread supply device is formed even larger by merely changing the structure of the existing sewing machine, thereby remarkably improving the sewing efficiency by drastically increasing the lower thread winding amount.

However, the 'invention' still has not solved the function of the lower thread exhaustion point which can predict the lower thread exhaustion point in advance and exchange and supply the lower thread at the right time by grasping the amount of the residual thread in the sewing work.

DISCLOSURE OF THE INVENTION The present invention has been made to solve the above problems, and it is an object of the present invention to provide a sewing machine in which a sewing machine can be efficiently sewed to a sewing machine, It is possible to reduce the production cost by automation since it is a simple manufacturing process and it is economical and it is easy to attach the optical sensor to the outer surface of the outer casing, The present invention is to provide a sewing machine thread supply apparatus having a lower thread exhaustion point advance notice function which makes it easy to connect a power source of a light sensor and a communication unit of a reception unit by wire.

In order to accomplish the above object, the present invention provides a sewing machine bottom yarn supplying apparatus 1 having a bottom yarn shortening point notifying function, which comprises a hook portion made up of a inner kiln 110 and an outer yarn 120, a U-bobbin 111, And a lower bobbin portion 112. The outer bobbin 120 rotatably mounted on the inner bobbin 110 is fixed to a lower portion of the sewing machine and includes a U bobbin 111 accommodating the lower thread bobbin 113, The inner kiln 110 having the U bobbin case 112 inside which the U bobbin 111 is housed is rotated around the central part in the outer shell 120 and the lower yarn is discharged to be knitted with the upper thread The receiving part 220 of the optical sensor 200 is detachably attached to the optical sensor coupling part 121 which is rotatably mounted inside the outer shell 120 so as to form sweat on the rod, And is spaced a certain distance from the opposite side of the lower thread supply device 100, H2, h3, and h4 are provided on the U bobbin 111, the U bobbin case 112, the inner kiln (body hook 110), and the outer kiln 120, And a lower thread exit point detecting function configured to detect a lower thread dead point by detecting the light from the optical sensor transmitting unit through the optical sensor receiving unit, wherein the light transmitting holes h1, h2, h3, (h1) is passed through the U-bobbin (111) at a point where the winding surface (114) on which a residue of a predetermined length capable of performing a residual finishing process after the alarm is wound is brought into contact with the bottom surface, The U bobbin case 112 is provided with a light transmitting hole h2 at a corresponding position on the bottom surface of the U bobbin case 112 accommodating the U bobbin 111, A light transmitting hole h3 is formed at a corresponding position on the bottom surface of the inner kiln (body hook 110) where the case 112 is joined, 120, is characterized in that the light-transmitting ball (h4) through holes in corresponding positions of the bottom surface outside the kiln 120. The

According to the present invention, it is possible to reduce the risk of errors caused by irregular reflection of light, reduce the production cost by automation since it is a simple manufacturing process, There is provided a sewing machine thread supply apparatus provided with a lower thread exit point notification function that is easy to attach an optical sensor to the outside of the outer casing and is easily connected to the communication unit of the transmission unit of the attached optical sensor by wire, It is possible to efficiently prevent sewing failures such as uneven stitches which may occur in a state in which the lower thread supply is interrupted in the future.

BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 is a schematic view of a bobbin feeder.
2 is an exploded perspective view of the lower thread supply device.
3 is an explanatory view for explaining the sewing principle of the lower thread feeding device.
4 is an explanatory view for explaining the configuration of the U bobbin.
Fig. 5 is an explanatory view for explaining a state in which the lower thread is unwound from the inside of the lower thread of the U bobbin. Fig.
6 is a state diagram for explaining that the lower thread housed in the U-bobbin is loosened from the inside and the light can pass through the light transmission hole when the winding surface reaches the light transmission hole.
7 is a schematic view of a U bobbin case.
8 is a state diagram for explaining an outline of a hook portion of a lower thread supply device, in which a inner kiln is mounted inside a jacket.
Fig. 9 is a view of a light transmission hole penetrating through the lower thread supply device. Fig.
10 is a schematic view of a light sensor.
11 is an explanatory view for explaining that light emitted from a light emitting portion of a light sensor passes through a light transmission hole of a lower thread supply device and is received by a receiving portion.
Fig. 12 is a perspective view of a sewing machine bobbin thread feeding apparatus having a bobbin exhaustion point advance function according to the present invention. Fig.

Hereinafter, a sewing machine bottom yarn supplying apparatus 1 having a bottom yarn waste point advance function according to the present invention will be described in detail with reference to the accompanying drawings.

Prior to this, terms and words used in the present specification and claims should not be construed as limited to ordinary or dictionary terms, and the inventor should appropriately interpret the concepts of the terms appropriately Therefore, it should be understood that the embodiments described herein are merely the most preferred embodiments of the present invention, and that the technical idea of the present invention is not limited to the technical concept of the present invention, It is to be understood that various equivalents and modifications may be substituted for those at the time of filing of the present invention. In the following description of the present invention, a detailed description of known functions and configurations incorporated herein will be omitted when it may make the subject matter of the present invention rather unclear.

Fig. 4 is an explanatory view for explaining the configuration of the U bobbin, Fig. 5 is an explanatory view for explaining a state in which the lower thread is unwound from the inside of the lower thread of the U bobbin, Fig. Fig. 7 is a schematic view of a U bobbin case, and Fig. 8 is a view showing a hook portion of a lower thread supply device. Fig. 7 is a schematic view of a U bobbin case, Fig. 10 is a schematic view of the optical sensor, Fig. 11 is a schematic view of the optical sensor, and Fig. 11 is a schematic view of the optical sensor, FIG. 12 is an explanatory view for explaining that the light emitted from the lower thread supply apparatus is received by the receiving unit through the light transmission hole of the lower thread supply apparatus. FIG. A perspective state diagram.

A sewing machine bottom yarn supplying device 1 having a lower yarn shortening point advance function according to the present invention is provided with a lower yarn feeder 1 having a hook portion made up of a inner kiln 110 and an outer yarn 120, a U bobbin 111 and a U bobbin case 112 And a U-bobbin 111 which is fixed to the lower portion of the sewing machine and receives the U-bolt 113. The U-bobbin 111 is inserted into the U- The inner kiln 110 having the U bobbin case 112 held therein is rotated around the central portion in the outer shell 120 to discharge the lower thread to form sweat on the upper thread while being woven with the upper thread The receiving part 220 of the optical sensor 200 is detachably inserted into the optical sensor coupling part 121 which is rotatably mounted in the outer shell 120 and is coupled to the outside of the outer shell 120, A light emitting portion 210 of the optical sensor 200 is positioned at a distance from the feeder 100, The light transmitting holes h1, h2, h3 and h4 are passed through the bell 111, the U bobbin case 112, the inner kiln (body hook 110) and the outer kiln 120, H2, h3, h4) of the U-bobbin (111), wherein the U-bobbin (111) and the U-bobbin (111) The U-bobbin case 112 is provided with the U-bobbin case 112 at a position where the winding surface 114 on which a residue of a predetermined length capable of carrying out a residual finishing process after the alarm is wound, (Body hook) 110 is provided with a light transmission hole h2 at a corresponding position on the bottom surface of the U bobbin case 112 accommodating the U bobbin case 111, And a light transmitting hole h3 is formed at a corresponding position of the bottom surface of the body hook 110, Characterized in that the light transmission hole (h4) through holes in corresponding positions.

The light emitted from the light emitting portion 210 of the optical sensor 200 passes through the respective light transmitting holes h1, h2, h3 and h4 and is received by the receiving portion 220 of the optical sensor 200 By operating the alarm device, the user can be informed of the point of exhaustion of the lower thread beforehand, and the lower thread can be exchanged and supplied to the user in a timely manner.

This will be described in more detail below.

The U-bobbin 111 is provided with a light transmitting hole h1 through the bottom surface of the U-bobbin 111 at a position spaced from the inner wall of the U-bobbin by a predetermined distance.

This is because the lower thread wound around the conventional bobbin is wound so as to be unwound from the outside toward the center of the take-up shaft, but the thread thread 113 accommodated in the U bobbin 111 of the present invention is wound from the center This is because the yarn is wound to the outside.

As shown in FIG. 6, the through hole (h1) of the U bobbin 111 has a predetermined amount of the lower thread rewinding surface 114 capable of performing the residual finishing process after the alarm 114. When the lower thread is wound on the bobbin, Which is used here to refer to the outer layer of the rewound which is wound here, the same shall apply hereinafter). However, the present invention is not necessarily limited thereto, and may be determined by necessity.

The inventor of the present invention has found that the required length of the lower thread necessary for performing the remaining finishing process of the sewing work is about 3 meters by a lot of trial and error. Therefore, at this time, the light transmitting hole h1 may be made to pass through at the point where the winding surface 114 in which the residue having a length of about 3 m is engaged with the bottom surface of the U bobbin.

That is, as shown in FIGS. 6 to 9, the U bobbin 111 is provided with a light transmitting hole (not shown) at a point where the winding surface 114, on which the residue of a predetermined length capable of performing the residual finishing process after the alarm, and a body hook for receiving the U bobbin case is provided at a position corresponding to a bottom surface of the U bobbin case for receiving the U bobbin. The light transmitting hole h3 is passed through the corresponding position of the bottom surface of the outer shell 120 and the light transmitting hole h4 is passed through at the corresponding position of the bottom surface of the outer shell 120. [

When the U bobbin 111, the U bobbin case 112 and the body hook 110 are coupled to each other, the U bobbin 111 and the U bobbin case 112, The light transmitting holes h1, h2 and h3 penetrated through the body hook 110 mounted on the inside of the body hook 110 constitute a linear tunnel so that the light from the photosensor light emitting portion 210 can be passed straight through.

In this case, if the U bobbin 111 is made of a transparent material or is at least a translucent material, the U-bobbin 111 may not be provided with a light transmission hole h1. This is because the U-bobbin (111) made of a material having a translucent material or more can receive and detect the light transmitted through the material.

A known optical sensor 200 as shown in FIG. 10 is used as the sensing means of the present invention, and a light sensor fixture 121 is coupled to a certain region outside the outer surface of the outer casing 120.

10, the optical sensor 200 has a receiving portion 220 attached to one end portion of the U-shaped frame 230 and a light emitting portion 210 attached to the other end portion of the U-shaped frame 230, 210, and the receiving unit 220 and the receiving unit so as to operate the alarm means such as an alarm sound or an alarm immediately.

Needless to say, the width of one end portion and the other end portion of the U-shaped frame 230 must be greater than the width of the lower thread supply device 100.

The optical sensor 200 configured as described above is detachably attached to the optical sensor fixture 121 coupled to the outside of the outer shell 120 at one end of the optical sensor 200 to which the receiver 220 is attached, 12, the transmitting portion 210 is positioned at a certain distance from the other side of the lower thread supplying device 100 and is electrically connected to the transmitting portion 210 so as to continuously emit light during the sewing operation.

The following describes the operation of the sewing machine bobbin thread feeding apparatus 1 provided with the bobbin exhaustion point advance function of the present invention.

In the state where the U-bobbin 111 is housed in the bobbin thread 113, light can not pass through the bobbin thread 113. However, when the sewing operation continues and the bobbin thread is released from the inside of the bobbin thread 113, When the surface 114 reaches the light transmitting hole h1 of the U bobbin 111, the light emitted from the light emitting portion 210 of the light sensor 200 is transmitted through the light transmitting hole h3 and h4 passing through the U bobbin 111, the body hook 110 and the outer shell 120 through the light receiving portions 220 of the optical sensor 200, And the light received by the light sensor 200 receiving unit 220 communicates with the notification unit and immediately activates the alarm means such as an alarm sound or an alarm to inform the user of the bottom dead center.

Since the inner kiln 110 of the present invention rotates, the light emitted from the emitting portion 210 of the optical sensor 200 is transmitted through the light transmitting holes h2, h1 and h3 of the inner kiln 110 and the light transmitting The light received by the receiving unit 220 of the optical sensor 200 passing through the hole may be considered to be discontinuous and continuous. However, the speed of the light travels 300,000 kilometers per second, The light emitted from the light emitting portion 210 of the optical sensor 200 sequentially passes through the light transmitting holes h2, h1, h3 and h4, So that it can continuously reach the receiving unit 220 of the base station 200 without interruption.

Since the outer shell 120 is fixed to the lower portion of the sewing machine, the optical sensor 200 can be easily attached and fixed to the outer surface of the outer shell 120, Also, it is easy to electrically connect the transmitting part 210 of the attached optical sensor 200 and the receiving part 220 by wire, so that the speed and the linearity of light, which are reliable physical properties, It is possible to configure the user so as to predict the bottom dead center of the user without concern about the error of diffuse reflection of light.

The bobbin 111, the U-bobbin case 120, the body hook 110, and the outer surface of the outer shell 120 are formed in advance on the bottom surface of the U-bobbin 111, (H1, h2, h3, h4) are formed at the positions corresponding to the positions corresponding to the lower thread reel winding surface 114 of the predetermined amount capable of performing the residual finishing process after the alarm, It is also possible to selectively use the lower thread feeding device 100 according to the thickness of the lower thread.

The light transmitting hole h2 is formed in the U bobbin case 112 except for the light transmitting hole h1 penetrated in the U bobbin 111. The light transmitting hole h2, (h3) and the light transmitting hole (h4) penetrated through the outer shell (120) are formed as long holes, the air circulation is accelerated during the rotation of the inner kiln (110) Therefore, it is preferable.

Although the present invention has been described in detail with reference to the above-mentioned preferred embodiments, the present invention has been described in detail with respect to a sewing machine punch feeder having a function of notifying a point of punch point. However, It is possible. It is, therefore, obvious that the appended claims are intended to cover such modifications and changes as fall within the true spirit of the invention.

h1, h2, h3, h4,
1 Sewing machine bobbin feeder with advance notice function
100 bobbin feeder
110 body kiln (body hook) 111 U bobbin 112 U bobbin case 113 bushing roundness 114 wound surface
120 Hook Housing (Hook Housing) 121 Light Sensor Fixture
200 optical sensor 210 transmitter 220 receiver 230 U-shaped frame

Claims (4)

delete And a lower bobbin part including a U-bobbin 111 and a U bobbin case 112 which are composed of a inner kiln 110 and an outer bobbin 120, 120 are fixed to the lower portion of the sewing machine and include a U bobbin 111 accommodating the lower thread bush 113 and a U bobbin case 112 accommodating the U bobbin 111 therein. Is rotatably mounted in the outer shell (120) so as to form a sweat on the rod material while being woven with the upper thread by being rotated around the center in the outer shell (120) The receiving part 220 of the optical sensor 200 is detachably inserted into the optical sensor coupling part 121 coupled to the outside and the optical sensor 200 is separated from the bottom part supplying device 100 by a predetermined distance, The bobbin case 111 and the U bobbin case 112 and the inner kiln 110 and the outer kiln 120, And a lower thread exhaust point detecting function configured to detect the lower thread dead point by detecting the light from the optical sensor emitter through the through holes (h1, h2, h3, h4) , The U-bobbin (111) is provided with a light transmitting hole (h1, h2, h3, h4) at which a winding surface (114) on which a residue of a predetermined length capable of performing a residual finishing process after the alarm is wound, And a light transmitting hole h2 is passed through the U bobbin case 112 at a position corresponding to a bottom surface of the U bobbin case 112 receiving the U bobbin 111, A light transmitting hole h3 is formed at a corresponding position of the bottom surface of the inner kiln body 110 where the U bobbin case 112 is fixed to the inner kiln body 110. In the outer kiln 120, Characterized in that a light transmitting hole (h4) is formed at a corresponding position on the bottom surface of the kiln (120) A sewing machine having a lower thread supply notice function. The lower thread supply device according to claim 2, wherein the lower thread supply device (100) further comprises a residual thread finishing step (110) according to the thickness of the lower thread in the U bobbin (111), the U bobbin case (112), the body hook (H1, h2, h3, h4) at positions corresponding to a predetermined amount of the lower thread rewinding surface 114 that can be carried out and corresponding positions to the respective lower thread rewinding surfaces 114, Wherein the sewing machine is provided with a sewing machine. The hood according to claim 2, further comprising a light transmitting hole (h2) penetrating through the U bobbin case (112) except for a light transmitting hole (h1) penetrated through the U bobbin (111) Wherein the light transmission hole h3 and the light transmission hole h4 penetrated through the outer shell 120 are formed as long holes.

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