WO2019009656A2

WO2019009656A2 - Rotary shuttle for stitching having motor embedded therein

Info

Publication number: WO2019009656A2
Application number: PCT/KR2018/007680
Authority: WO
Inventors: 강소대
Original assignee: 강소대
Priority date: 2017-07-07
Filing date: 2018-07-06
Publication date: 2019-01-10
Also published as: KR101939177B1; WO2019009656A3

Abstract

The present invention relates to a rotary shuttle in which, in a state of excluding a conventional power transfer rotary unit having a power transfer protrusion coupled to a hook body, a rotor is fixedly inserted around a hook body, and a stator is fixedly inserted into a housing so that the hook body is rotatably mounted to the housing mounted on a main body of a sewing machine or an embroidery machine, wherein the rotator has an N-polarity magnet and an S-polarity magnet, and wherein the stator is connected to a current supply circuit unit so as to have a plurality of electromagnets selectively taking on N-polarity or S-polarity according to a current retraction direction.

Description

Rotating pedestal for stitch with built-in motor

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rotating drum for stitches incorporating a motor, and more particularly, to a rotating drum for stitches incorporating a motor. More particularly, the stator is coupled to a housing of a rotating drum, a rotor is circumscribed on a hook body of a rotating drum, To a striking drum.

The rotating drum for stitch is disclosed in Patent Registration No. 10-1657607, which is patented and patented by the present inventor.

The above described rotating drum is an apparatus for hitch stitching.

The above described rotary drum includes a housing of a fixed chain coupled to a main body of a sewing machine and an embroidery machine, a frame of a power transmitting and rotating part in a state of being rotatably mounted on the housing so as to be rotatably driven at the center of a rotating shaft perpendicular to the moving path of the reciprocating needle, A bobbin case base which is inserted into the hook body and is coupled to the housing so as not to rotate together with the hook body, and a bobbin case base which is detachably mounted on the bobbin case base A hook body release preventing ring fixed to one inner circumferential surface of the housing to prevent the hook body from being detached in one direction of the housing, and a bobbin case detachment ring which is detached in the other direction of the hook body And a bobbin case base detachment prevention ring.

The hook body is provided with a hook portion. The hook portion is formed with a sloped surface toward the power transmission rotary portion. The hook body is disposed in the housing adjacent to the needle so that the needle body is positioned before the bobbin chamber in the direction of rotation of the hook portion. And the stitch side string portion of the needle thread loop is wound on the inclined face of the hook portion and adjacent to the power transmitting and rotating portion of the bobbin case base The hook body is shaped so that the needle thread loop is jumped to the bobbin case base by being guided to one side, so that the tensile strength of the embossed material is stronger than that of the existing lock stitch and the wrinkle is small. And provides an action effect that prevents the built-in material from falling out easily. Also, The hitch stitch is not loosened if either the needle thread or the bobbin thread is broken or the needle thread is pulled in a tensioned state.

However, since the power transmission rotary part is engaged with the output shaft of the motor for reciprocating the needle and the thread take-up device via the power transmitting means such as a bevel gear, the rotary drum is disadvantageous in that the meshing noise between the gears is increased.

Such a problem also occurs when the power cut-and-rotate portion is integrally coupled to the hook body to drive the hook body.

In addition, a portion of the outer circumferential surface of the hook body built in the housing rotates in contact with the power transmission protrusions when the loop of the needle room is roped and exits the contacted portion. There is a problem that the quality of the needle is not constant or a phenomenon of single-threading occurs.

A rotating drum having a residual amount detection function is disclosed in U.S. Patent No. 5,353,726.

The spinning reel includes a hook body having one end connected to a driving shaft incorporated in a frame of a sewing machine and rotated together with the driving shaft, a bobbin case base inserted into the hook body so as not to rotate together with the hook body, And a bobbin rotatably incorporated therein.

Wherein one of side surfaces of the bobbin case base opposite to the drive shaft is opened to insert the bobbin therein so as to be embedded therein , And the other side is blocked to support a support shaft which allows the bobbin to be rotatable in the middle of the bobbin case base.

In addition, the above-described rotary drum includes a magnetic detection sensor disposed to face one flange of the bobbin to which the permanent magnet is attached.

In order to detect magnetism generated in the permanent magnet by the magnetic sensor, a small through hole is formed in a portion of the other side surface of the bobbin case base facing the magnetic detection sensor, .

When the bobbin is rotated by the bobbin thread unwound from the bobbin by stitching, the magnetic force generated in the permanent magnet faces the through hole formed in the other side surface of the bobbin base case Is radiated through the through hole and is detected by the magnetic detection sensor.

Therefore, if the number of rotations of the bobbin can be grasped by the magnetic sensor, when the bobbin thread is wound on the bobbin when it is mounted on the bobbin case base, the number of rotations of the bobbin thread Numerical analysis can be used to determine the amount of waste.

However, in the above-described rotary baskets, the hook body is once supported by the front end of the drive shaft, so that trembling occurs when the hook body rotates, and the magnetic detection sensor is fixed to the main body of the sewing machine or the embroidery machine, There is a case where the magnetic detection sensor does not face the through hole at the time when the detection sensor is to be detected, so that even if the bobbin rotates once, the magnetic detection sensor can not detect one rotation of the bobbin, There is a problem that the reliability of the yarn remaining amount is lost.

In addition, in the above-described rotation baskets, the magnetic detection sensor is disposed adjacent to the side where the bobbin case base is attached to and detached from the hook body. When the bobbin case base is attached to and detached from the hook body, There is a problem that it is necessary to perform a troublesome position moving operation to move the position.

In order to solve such a problem, it is considered that the magnetic detection sensor is disposed on the drive shaft side and the permanent magnet is attached to the flange side of the bobbin facing the drive shaft. However, one side of the hook body facing the drive shaft is coupled to the drive shaft The magnetic detection sensor is a rotator and the receiver is a fixed body so that the magnetic sensor can be mounted on the main body of the sewing machine or the embroidery machine, There is a problem that a carbon brush for electrical connection therebetween is required, the structure is complicated, and the carbon brush is periodically replaced with a new one, so that such consideration can not be applied.

In order to prevent the bobbin from being detached from the bobbin case base, the bobbin cap is mounted between the magnetic detection sensor and the bobbin, and the bobbin cap is mounted on the bobbin case base. The means for mounting the bobbin case base on the bobbin cap and the means for holding the bobbin cap are disposed on the surface of the bobbin cap so that the thickness of the surface of the bobbin cap facing the magnetic detection sensor is large, There is a limit in narrowing the distance between the permanent magnet and the magnetic detection sensor so that the magnetic force in inverse proportion to the distance is weakened and the magnetic detection sensor can not detect the magnetic force sent from the permanent magnet properly so that the number of rotations of the bobbin can not be grasped .

The present invention has a problem in solving the above-mentioned problems.

The present invention relates to a sewing machine or an embroidery sewing machine in which a rotor is fixedly circumscribed to a hook body while a conventional power transmitting and rotating portion having a power transmitting projection engaged with a hook body is excluded, Wherein the rotor has a magnet having an N polarity and a magnet having an S polarity, and the stator is connected to the current supply circuit portion and selectively connected to the N polarity The above-described problems can be solved by providing a plurality of electromagnets having S polarities.

Further, the present invention is characterized in that a bobbin cap and the like are mounted on a flange of a bobbin with a bobbin cap and the like and permanent magnets exposed in the direction of the bobbin, and the bobbin cap and the like are placed on the surface of the bobbin case base facing the flange of the bobbin At least one through hole facing the permanent magnet is formed and the magnetic detection sensor is mounted on the fixed bracket of the housing so as to face the permanent magnet.

According to the present invention, since the hook body is not driven by a motor that reciprocates the needle and the thread take-up unit but is driven by a separate motor, The power transmission means such as the bevel gear for causing noises in the needle thread can be excluded, so that the noise can be remarkably reduced as compared with the prior art, and the conventional power transmission projection for rotating the hook body can be eliminated, The load is not received when the rope skipping motion is carried out, so that the quality of the needle is maintained constant, and at the same time, the single yarn phenomenon can be prevented.

Further, since the hook body is supported at both ends by the housing alone, no vibration occurs when the hook body rotates, so that the magnetic detection sensor fixed to the housing can accurately detect the magnetic force of the permanent magnet mounted on the bobbin The permanent magnet can be mounted on the flange surface of the bobbin which is placed on the back of the bobbin cap and the direction in which the bobbin cap is coupled to the bobbin case base The magnetic detection sensor can be disposed adjacent to the permanent magnet and the bobbin can be easily attached to or detached from the bobbin case base, It is possible to prevent the magnetic force, which is inversely proportional to the distance, from being weakened in the state where the carbon brush, which may be conventionally required, is excluded, To the sensor properly detects a magnetic force outgoing from the permanent magnet the rotational speed of the bobbin may provide a function and effect that can accurately grasp.

1 is a perspective view showing a rotary drum according to the present invention,

Fig. 2 is an exploded perspective view of Fig. 1, and

3 is an exploded perspective view showing that the bobbin thread tension adjusting means is provided in the rotary drum of FIG.

Hereinafter, a rotating drum for stitches incorporating a motor according to an embodiment of the present invention will be described in detail with reference to FIG. 1 to FIG.

The rotary drum described below is a vertical rotary drum of Korean Patent Application No. 10-2015-0172457 filed by the present inventor, a rotary drum drum of Korean Patent Application No. 10-2016-0063712, and Korean Patent Application No. 10-2016 -0071934 can be applied to a vertically rotating drum for zigzag sewing, and will be described below only for a vertical spin drum for convenience of explanation.

In the following description, the right side will be referred to as one side, the left side as the other side in the direction of the rotational center line of the hook body.

1 and 2, the rotary drum of the present embodiment is indicated by reference numeral 100. In Fig.

The rotary drum 100 is fixed to a main body (not shown) of a sewing machine or an embroidery machine, and a large-diameter portion 11 and a small-diameter portion 12 are formed on the inner peripheral surface of one side and the other side, A housing 10 formed with a housing 10; A cut portion 22 is formed in a part of an outer circumferential surface of the outer circumferential surface facing the hook portion 21 so as to have an outer diameter larger than that of the small diameter portion 12, A ring-shaped hook body 20 rotatably mounted on the large-diameter portion 11 of the body 10; A bobbin case base 30 inserted into the other side of the housing 10 so as not to rotate with respect to the housing 10 so that the hook body 20 is rotatably mounted on the hook body 20; A bobbin (40) which is rotatably mounted on the bobbin case base (30) at the other side of the housing (10); Is inserted into the small diameter portion (12) of the housing (10) so as to rotate relative to the housing (10) while being rotatably circumscribed on the bobbin case base (30) A bobbin case base deviation preventing member 50 fixed to the body 20 to prevent the bobbin case base 30 from being detached from the hook body 20 in the other direction; And a hook member 20 which is inserted into and detachable from the large diameter portion 11 of the housing 10 in a manner such as a female screw and a male screw so as to prevent the hook body 20 from being detached in one direction of the housing 10. [ 10 of the present invention.

Unlike the related art, the rotary drum 100 further includes a motor unit 200.

The motor means 200 includes an N pole magnet 210 and an S pole magnet 211 as rotors fixedly circumscribed to the hook body 20 with the cutout 22 interposed therebetween; The N pole magnet 210 and the S pole magnet 211 are fixed to the hook body 20 by fastening means such as a screw to surround the N pole magnet 210 and the S pole magnet 211, A lid piece 220 in the form of a gib that fixes the lid to the hook body 20; And a ring-shaped stator 230 detachably and internally fixed to the hook body separation preventing ring 60.

The stator 230 may be coupled to the housing 10, though not shown.

A plurality of electromagnets 231 are mounted on the inner circumferential surface of the stator 230.

The plurality of electromagnets 231 are magnetized when an electric current flows and return to their original state when the electric current is interrupted. When the N and S polarities are selected .

Therefore, when the plurality of electromagnets 231 face the N pole magnet 210, the plurality of electromagnets have the N polarity, and the plurality of electromagnets 231, which face the S pole magnet 211, So that the electromagnets have an S polarity so that the N poles 210 and the S poles 211 rotate together with the hook body 20 as a rotor by a repulsive force or a pulling force, (Not shown) provided in the housing 10 and the main body of the embroidery machine.

For this, a plurality of coil bobbins 232 are formed on the inner circumferential surface of the stator 230 at intervals in the circumferential direction, and the plurality of coil bobbins 232 are provided with a plurality of unillustrated A token-shaped bracket (240) having a plurality of through holes (241) through which the plurality of coils can be inserted to stably and uniformly route the coils is wound around the stator (230) As shown in Fig.

The rotary drum 100 further includes a bobbin dry spot amount detecting means 300 for detecting a residual amount of the bobbin thread wound on the bobbin 40.

The bobbin glass spot amount detecting means 300 includes a magnetic detection sensor 310 mounted on the bracket 240 so as to be exposed in the other direction and a flange 41 located on one side of both flanges of the bobbin 40, And a permanent magnet 320 which is mounted on a part of the surface facing one side of the magnet 320 in such a manner as to be exposed in one direction.

The magnetic detection sensor 310 and the permanent magnet 320 are positioned on the bracket 240 and the flange 41 at the same radius on the axis of rotation of the bobbin 40.

In addition, a surface of the bobbin case base 30 facing in one direction is provided with a pair of opposed radially opposing surfaces so as not to disturb at least the magnetic force of the permanent magnet 320 on the magnetic detection sensor 310 The

cutouts

31 and 31 are formed.

In the rotary cylinder 100 constructed as described above, the plurality of electromagnets 231, which are stators, are selectively made to have an N-polarity and an S-polarity under the control of the electric circuit unit, and the N-pole magnet 210 and the S- The hook body 20 having the N-pole magnet 210 and the S-pole magnet 211 fitted thereon is rotated in one direction by pushing the magnet 211 or acting as a gear rotor, do.

The rotary cylinder 100 configured as described above is configured to detect the magnetic force generated in the permanent magnet 320 mounted on the bobbin 40 disposed on the other side of the magnetic detection sensor 310, It sends the detection to the central processing unit and judges the central processing unit to be one rotation of the bobbin 40 every time the detection information is received. When the information is accumulated, the amount of the bobbin thread wound on the bobbin 40 is grasped .

Therefore, according to the above-described rotary drum 100, since the hook body 20 is not driven by a motor that reciprocates the needle and the thread take-up unit but is driven by a separate motor provided in the rotary drum, The conventional power transmission means such as a bevel gear which is provided for rotating the hook body 20 can be excluded, so that noise can be remarkably reduced as compared with the prior art, The protrusion can be excluded so that the loop of the needle thread is not subjected to the load when the rope skipping motion is carried out, so that the needle thread quality can be kept constant and the single threading phenomenon can be prevented.

The hook body 20 is supported at both ends only by the housing 10 so that the hook body 20 is not tilted when the hook body 20 rotates, The magnetic detection sensor 310 fixed to the bobbin 40 accurately detects the magnetic force of the permanent magnet 320 mounted on the bobbin 40 to reliably obtain the amount of the bobbin thread remaining in accordance with the number of rotations of the bobbin 40 The permanent magnet 320 is mounted on the flange 41 side of the bobbin 40 facing the one side and the magnetic detection sensor is disposed on one side of the housing 10 so as to be adjacent to the permanent magnet 320 The magnetic detection sensor 310 can be positioned adjacent to the permanent magnet 320 more easily than in the prior art while facilitating attachment and detachment of the bobbin 40 to the bobbin case base 30, In a state in which a carbon brush which may be required in the prior art is excluded, It is possible to accurately detect the magnetic force transmitted from the permanent magnet 320 by the magnetic detection sensor 310 and accurately grasp the number of revolutions of the bobbin 40. In addition,

In the above embodiment, a plurality of through holes 241 are formed in the bracket 240 of the rotary drum 100 and the magnetic detection sensor 310 is provided. However, the present invention is not limited to this, A second bracket detachably attached to the bracket 240 formed with the plurality of through holes 241 to adjust the tension of the bobbin thread wound around the bobbin 40 at the time of sewing, A magnetic detection sensor 310 is provided on the second bracket 41 so as to be exposed in the other direction and a flange 41 disposed on one side of both flanges of the bobbin 40 The permanent magnets 320 are provided on one side of the bobbin 40 and the permanent magnets 320 are mounted on the bobbin 40. The permanent magnets 320 are disposed on the bobbin 40, ) Of the flange (41) at a portion of the flange (41) located radially outward of the flange (41) A plurality of N-polarity or S-polar monopolar magnets 401 spaced in the circumferential direction are provided so as to be exposed in one direction, and a portion of the surface of the second bracket 410 facing the flange 41 A plurality of electromagnets 420 are arranged to face the plurality of single-pole magnets 401 in the circumferential direction of the second bracket 410 at a position radially outward of the position where the magnetic sensor 310 is located You may.

At this time, if the plurality of single-pole magnets 401 are N-polarized, the plurality of electromagnets 420 may be set by control of the electric circuit unit to have S-polarity or N-polarity, The magnetic force of the plurality of electromagnets 420 is set by control of the electric circuit unit so as to have the N polarity or the S polarity so that the bobbin 40 can be controlled by the attractive force or the repulsive force of the magnetic force, The tension of the bobbin thread wound in the bobbin 40 at the time of sewing can be controlled by adjusting the load rotating in the base 30.

Claims

A housing 10 fixed to a main body of a sewing machine or an embroidery machine;

A cutout portion 22 is formed in a part of the outer circumferential surface facing the hook portion 21 so as to be rotatably mounted on one side of the housing 10, Shaped hook body (20);

A bobbin case base 30 inserted into the other side of the housing 10 so as not to rotate with respect to the housing 10 so that the hook body 20 is rotatably mounted on the hook body 20;

A bobbin (40) which is rotatably mounted on the bobbin case base (30) at the other side of the housing (10);

The bobbin case base 30 is fixed to the hook body 20 while being rotatably circumscribed to the bobbin case base 30 to prevent the bobbin case base 30 from being separated from the housing 10 in the other direction. Preventing member 50; And

The hook body 20 is detachably attached to the large diameter portion 11 of the housing 10 to prevent the hook body 20 from being detached in one direction of the housing 10, A rotary drum (60) comprising a prevention ring (60)

An N pole magnet 210 and an S pole magnet 211 as a rotor fixedly circumscribed to the hook body 20 with the notched portion 22 therebetween; And

And a motor means (200) having a ring-shaped stator (230) detachably fixed to the hook body release preventing ring (60) or the housing (10)

Wherein a plurality of electromagnets (231) are mounted on an inner peripheral surface of the stator (230).
The method according to claim 1,

And a cover body 220 which surrounds the N pole magnet 210 and the S pole magnet 211 and is fixed to the hook body 20 to fix the N pole magnet 210 and the S pole magnet 211 to the hook body 20, (220) for rotating the stitch.
The method according to claim 1,

A plurality of coil bobbins 232 are formed on the inner circumferential surface of the stator 230 at intervals in the circumferential direction,

A plurality of coils electrically connected to the electric circuit unit are wound on the plurality of coil bobbins 232,

A token-shaped bracket 240 having a plurality of through holes 241 through which the plurality of coils can be inserted is fixed in the stator 230 so as to stably and uniformly wire the plurality of coils A rotary drum for stitches with built-in motor.
The method of claim 3,

Further comprising a bobbin glass spot amount detecting means (300) for detecting a residual amount of the bobbin thread wound on the bobbin (40)

The bobbin glass spot amount detecting means (300)

A magnetic detection sensor 310 mounted on the bracket 240 in such a manner as to be exposed in the other direction and a flange 41 disposed on one side of both flanges of the bobbin 40, And a permanent magnet (320) mounted so as to be exposed to the stator.
5. The method of claim 4,

Wherein the magnetic detection sensor 310 and the permanent magnet 320 are positioned on the bracket 240 and the flange 41 at the same radius on the axis of rotation of the bobbin 40. [ Rotating bicycle for stitching.
6. The method of claim 5,

The cutout portion 31 is formed on the surface of the bobbin case base 30 facing in one direction so that the magnetic force of the permanent magnet 320 does not interfere with the magnetic detection sensor 310 at a minimum Wherein the stitch includes a motor.
The method of claim 3,

Further comprising a bobbin thread tension adjusting means for adjusting a tension of the bobbin thread wound on the bobbin (40)

Wherein the bobbin thread tension adjusting means comprises:

A plurality of electromagnets 420 mounted on the surface of the bracket 240 facing the other side with a spacing in the circumferential direction of the bracket 240 and a flange 220 disposed on one side of both flanges of the bobbin 40 And a plurality of single-pole magnets (401) mounted so as to be exposed in one direction with a gap in the circumferential direction of the flange (41) on a surface facing one side of the stator North Korea.