KR101589033B1 - Lower thread breaking auto-sensing machine device and auto-stopping method of embroidery - Google Patents

Lower thread breaking auto-sensing machine device and auto-stopping method of embroidery Download PDF

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Publication number
KR101589033B1
KR101589033B1 KR1020140084745A KR20140084745A KR101589033B1 KR 101589033 B1 KR101589033 B1 KR 101589033B1 KR 1020140084745 A KR1020140084745 A KR 1020140084745A KR 20140084745 A KR20140084745 A KR 20140084745A KR 101589033 B1 KR101589033 B1 KR 101589033B1
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South Korea
Prior art keywords
lower thread
shaft
hook
operation lever
detection
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KR1020140084745A
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Korean (ko)
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KR20140105418A (en
Inventor
하이지앙 왕
전계욱
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쥬지 신신 메커니컬 앤드 일렉트리컬 테크놀로지 컴퍼니 리미티드
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    • D—TEXTILES; PAPER
    • D05—SEWING; EMBROIDERING; TUFTING
    • D05C—EMBROIDERING; TUFTING
    • D05C11/00—Devices for guiding, feeding, handling, or treating the threads in embroidering machines; Machine needles; Operating or control mechanisms therefor
    • D05C11/08—Thread-tensioning arrangements
    • D05C11/14—Stop motions responsive to thread tension or breakage

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

Abstract

[0001] The present invention relates to a device for automatic detection of a bobbin thread breakage in an embroidery machine and a method for automatically stopping a bobbin thread detection lever in a bobbin thread detection block, wherein a bobbin thread detection operation lever is hinge- The spindle is provided with a lower thread sensing drive cam (cam), which interacts with the bottom of the lower thread sensing operation shaft, and an actuating part is provided at the head end of the lower thread sensing operation shaft to interact with the head end of the lower thread sensing operation lever , The lower thread is blocked at the bottom of the lower thread detection operation lever and the lower thread trimming detector is installed in the motion trajectory of the lower thread detection operation lever. In the present invention, when the lower thread is broken, the lower thread detection operation lever reaches the detection point of the lower thread break detector, beyond the predetermined trajectory, at which time the lower thread break detector sends the lower thread break signal to the controller. Therefore, the present invention can solve the problem that there is no special device for stopping the apparatus when the lower thread of the prior art is broken or used, and the economic time loss can be minimized.

Description

TECHNICAL FIELD [0001] The present invention relates to an automatic sewing machine and an automatic sewing machine,

The present invention relates to a kind of embroidery machine, and more particularly, to a method and apparatus for controlling the machine and automatically stopping the embroidery machine when the embroidery work is finished, when the embroidery work is performed.

As shown in Fig. 1, the embroidery machine generally stitches the embroidery work by the hooks formed by the embroidery threads and the lower thread 103 by the needles and the hooks 10.

Generally, if the embroidery yarn is cut off, the device can be stopped by the signal of the detection plate and the detector, but the lower thread 103 is basically unusable.

There is no special device to stop the machine when the lower thread 103 is broken or exhausted. If the embroidery yarn is not cut off, the machine continues to rotate and can not form a ring during unidirectional embroidery work. Therefore, it is frequently restored (returned) or self-defective.

In the prior art, the lower thread detection operation lever is installed on the hook to detect the lower thread. The lower thread detection operation lever descends when the needle is pointing to the lower side of the needle plate, and when the hook forms a loop, the embroidery thread and the lower thread are interfered with the lower thread detection operation lever. In addition, it is easy to infiltrate the foreign matter into the spring drive unit which returns the motion of the lower thread detection operation lever, resulting in an operation error.

SUMMARY OF THE INVENTION [0006] The present invention provides an automatic sewing machine for automatically detecting an end of an upper thread and an automatic stopping method for an end of a lower thread.

In order to solve the above technical problems, the present invention uses the following technical solutions. An embroidery bobbin automatic sensing device includes a main shaft and a hook shaft perpendicular to the main shaft. A hook is provided at the head end of the hook shaft and a hook gear is provided at the end. The main shaft gear and the hook gear are engaged with each other to rotate the hook shaft and the hook, and a lower thread detecting block A lower thread detection operation lever is hinge-connected to the lower thread detection block, a torsion spring is provided between the lower thread detection operation lever and the lower thread detection block, and one side of the hook shaft Wherein the lower thread detecting operation shaft is movably installed in the lower thread detecting operation shaft sleeve and the operation shaft restoring spring is installed between the lower thread detecting operation shaft sleeve and the lower thread sensing operation shaft, , A lower thread sensing drive cam (cam) is provided on the main spindle to interact with the bottom of the lower thread sensing operation shaft, The lower thread detection operation lever is provided with an operation unit at the head end of the lower thread detection operation shaft and is operative with the head end of the lower thread detection operation lever. The lower thread is blocked at the bottom of the lower thread detection operation lever, .

Preferably, at least two adjustment holes are provided in the lower thread sensing block, and the refractive portions at one end of the torsion spring are fitted into the adjustment holes.

Preferably, the actuating part includes an actuating block, and an actuating head is provided at the top of the actuating block.

Preferably, the actuating head is provided with a bearing or a roller.

Preferably, the base of the actuating block is mounted for rotation in the lower thread sensing actuation axis and is fixed in a hooping configuration.

Preferably, the lower thread detection operation lever includes an arc-shaped bending section of the head end and an L-shaped section of the hem, and an L-shaped bending section is provided between the arcuate bending section and the L-shaped section.

Preferably, a rolling head is provided at the bottom of the lower thread sensing operation shaft, and the rolling head is a bearing or a roller.

Preferably, a lock shaft is provided at one side of the lower thread sensing operation shaft, the lock shaft is driven by an electromagnet, a lock head is installed at a head end of the lock shaft, A lock groove is provided corresponding to the head.

Further, the present invention further provides a method of automatically stopping the bottom thread of the embroidery machine.

When the main spindle is rotated, the main shaft gear and the lower chamber sensing drive cam rotate to rotate the hook shaft and the hook in the same direction along the hook gear. At the same time, the lower chamber sensing drive cam drives the lower thread sensing operation shaft, Perform a linear reciprocating motion along the shaft sleeve.

When the lower thread is present, the lower thread and the lower thread detecting operation shaft are common to the lower thread detecting operation lever, and the lower thread detecting operation lever is in a normal reciprocating motion, and the lower thread detecting operation lever can not reach the detection point of the lower thread break detector. When the lower thread is broken, both ends of the lower thread detecting operation lever are broken and the lower thread detecting operation lever reaches the detection point of the lower thread break detector, at which time the lower thread break detector sends a lower thread break signal to the controller.

Then, the controller controls the spindle motor to stop the rotation.

Preferably, when cutting the thread, when the stop of the lower thread detecting operation shaft operation is required, the controller sends a signal to the electromagnet, and the electric motor of the electromagnet causes the lock shaft to move in the direction of the lower thread sensing operation axis . Finally, the lock head is engaged with the lock groove to stop the movement of the lower thread detection operation shaft toward the lower thread detection operation lever.

In the technique of the present invention, the spindle cooperates with the lower thread sensing drive cam to rotate, and the lower thread sensing operation shaft is linearly moved by driving the lower thread sensing drive cam, and the lower thread sensing operation shaft is moved to the limit position by the action of the operation shaft restoring spring And then restored. Therefore, the bobbin sensing operation shaft is subjected to a linear reciprocating movement along the bobbin sensing operation shaft sleeve, the bobbin detection operation lever is equivalent to one lever, and the bobbin detection operation lever is operated with the torsion spring, the bobbin thread, When both ends of the lower thread detection operation lever are broken, the lower thread detection operation lever reaches the detection point of the lower thread break detector beyond the predetermined trajectory, and the lower thread break detector is moved to the lower thread It sends a disconnect signal. Therefore, the present invention can solve the problem that there is no special device for stopping the apparatus when the lower thread of the prior art is broken or used, and the economic time loss can be minimized.

BRIEF DESCRIPTION OF THE DRAWINGS The invention will be further described with reference to the accompanying drawings and specific embodiments thereof.
FIG. 1 is a structural explanatory view of a bottom thread break automatic sensing apparatus; FIG.
FIG. 2 is a structural explanatory view of a bottom thread break automatic sensing apparatus; FIG.
3 is a structural explanatory view after the lock shaft locks the lower thread detection operation lever;
Fig. 4 is an explanatory view of an opener device structure in a drum inside of an embroidery hook; Fig. And
5 is an explanatory diagram of matching between the opener grip and the inner guide.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail with reference to the accompanying drawings and embodiments, with reference to the accompanying drawings.

1 to 3, the apparatus for automatically detecting the bobbin thread breakage of the embroidery machine according to the present invention includes a main shaft 2 and a hook shaft 1 perpendicular to the main shaft 2, A hook 10 is provided at the head end and a hook gear 11 is provided at the bottom of the hook shaft 1. The main shaft 2 is provided with a main shaft gear 20 and a hook gear 11, The main shaft gear 20 and the hook gear 11 are engaged with each other to rotate the hook shaft 1 and the hook 10.

A lower thread detection block 40 is installed on the rear side of the hook 10 and a lower thread detection operation lever 41 is hinged to the lower thread detection block 40. The lower thread detection operation lever 41 and the lower thread detection A torsion spring 402 is installed between the blocks 40. A lower thread sensing operation shaft 4 is installed parallel to one side of the hook shaft 1 and the lower thread sensing operation shaft 4 is movably installed in a lower thread sensing operation shaft sleeve 49, An operation shaft restoring spring 48 is provided between the sleeve 49 and the lower thread sensing operation shaft 4 and a lower thread sensing operation is applied to the lower thread sensing operation shaft 4, A cam 21 is provided. The lower thread detection operation lever 4 is provided at its head end with an operation section which interacts with the head end of the lower thread detection operation lever 41. The lower thread 103 blocks the bottom of the lower thread detecting operation lever 41 and the lower thread breaking detector 45 is installed on the motion trace of the closed chamber sensing operation lever 41.

The main shaft 2 is interlocked to rotate the hook shaft 1 by the hook gear 11 and to rotate the main shaft gear 20 and the lower chamber sensing drive cam 21 in rotation. The lower thread sensing operation cam 21 drives the lower thread sensing operation shaft 4 to linearly move and the lower thread sensing operation shaft 4 is moved to the limit position by the operation of the operation shaft restoring spring 48 The lower thread detection operation shaft 4 is linearly reciprocated along the lower thread detection operation shaft sleeve 49. The lower thread detection operation shaft 4 is then returned to its original position.

The lower thread detection operation lever 41 is configured such that the lower thread detection operation lever 41 is moved in the direction of a set locus under the action of the torsion spring 402, the lower thread 103 and the lower thread detection operation lever 41, . When the lower thread 103 is broken, both ends of the lower thread sensing operation lever 41 are broken. When the lower thread detection operation lever 41 reaches the detection point of the lower thread break detector 45, the lower thread break detector 45 sends a lower thread break signal to the controller.

At least two adjustment holes 401 are formed in the bush branch block 40 and one end of the torsion spring 402 is fitted into the adjustment hole 401. It is necessary to adjust the strength of the torsion spring 402 according to the magnitude of the tensile force of the lower thread 103. A plurality of adjustment holes 401 are formed in the lower thread detection block 40 and the refractive portions of the torsion springs 402 are fitted into different adjustment holes so that the tensile force of the torsion spring 402 can be adjusted, It is possible to prevent the lower thread detection operation lever 41 from being restored to its original position due to the tensile force and foreign matter of the lower thread detection operation lever 41. [

The operating portion includes an operating block (43). An actuating head 44 is provided at the top end of the actuating block 43 and a bearing for causing rolling friction between the actuating head 44 and the lower chamber sensing actuating lever 41 Because the rollers are installed, the movement can be more smoothly assisted and the friction reduction effect can be maximized. When the hoop on the operation block 43 is released, the operation block 43 and the operation head 44 adjust the front and rear positions in the lower thread detection operation shaft 4, There is an effect.

The lower thread detection operation lever 41 includes an arc-shaped bending section 412 formed at the head end and an L-shaped section 411 formed at the bottom. An L-shaped bending portion is formed between the arc-shaped bending section 412 and the L-shaped section 411. The actuating head 44 and the arc-shaped bending section 412 interact with each other, and the L-shaped section 411 and the bottom thread interact with each other, and the hinge- And is provided at a connection position of the refraction section 412 and the L-type refraction section.

In addition, a rolling head 47 is installed at the bottom of the lower thread sensing operation shaft 4 and the rolling head 47 is a bearing or a roller. The lower thread sensing operation shaft 4 and the lower chamber sensing driving cam 21 ), Allowing more smooth motion and maximizing the effect of reducing friction.

A lock shaft 46 is provided at one side of the lower thread sensing operation shaft 4 and perpendicular to the lock shaft 46. The lock shaft 46 is driven by an electromagnet. And a locking groove is formed in the lower thread sensing operation shaft 4 in correspondence with the locking head 461. When the thread is cut, the lower thread detecting operation lever 41 must be stopped so that the lower thread 103 and the embroidery thread do not interfere with each other. At this time, the controller controls the electromagnet to load electricity, and the electromagnet drives the lock shaft 46 to move in the direction of the lower thread sensing operation shaft 4, and the lock head 461 is inserted into the lock groove And the lower thread sensing operation shaft 4 is stopped. Therefore, the lower thread detection operation lever 41 can be stopped from rotating in the direction of the lower thread perception shaft 4.

The following is a description of the rice cooker in which the machine automatically stops when the lower thread of the embroidery machine is cut off.

When the main shaft 2 rotates, the main shaft gear 20 and the lower chamber sensing drive cam 21 rotate together so that the hook shaft 1 and the hook 10 rotate along the hook gear 11, The cam 21 drives the lower thread sensing operation shaft 4 to linearly reciprocate along the lower thread sensing operation shaft sleeve 49.

When the lower chamber 103 is present, the lower chamber 103 and the lower chamber sensing operation shaft 4 simultaneously act on the lower chamber sensing operation lever 41, and the lower chamber sensing operation lever 41 advances the normal reciprocating motion. When the lower thread detection operation lever 41 does not reach the detection point of the lower thread break detector 45 and the lower thread breaks, the balance between the lower thread detection operation lever 41 is broken. When the lower thread detection operation lever 41 reaches the detection point of the lower thread break detector 45, the lower thread break detector 45 sends a lock-out signal to the controller.

Then, the controller controls the spindle motor to stop the rotation.

When cutting the thread, the lower thread sensing actuation axis (4) must be stopped. At this time, the controller sends a signal to the electromagnet, and the electromagnet drives the lock shaft 46 to move in the direction of the lower thread sensing operation shaft 4, the lock head 461 is fitted in the lock groove, (4) stops moving toward the lower thread detection operation lever (41).

4 to 5, an opener drive shaft 3 is installed parallel to one side of the hook shaft 1 and the main shaft 2 is driven to move the opener drive shaft 3 along the axial direction An opener drive shaft (22) is provided in which the opener drive shaft (3) is movable within an opener drive shaft sleeve (34) and between the opener drive shaft sleeve (34) and the opener drive shaft An opener return spring 33 is provided at the head end of the opener driving shaft 3 and an opener grip 31 is provided at the head end of the opener driving shaft 3 to interlock the inner drum 101 in a clockwise direction.

The opener block 31 is installed in an opener block 32 and a hooping structure 321 connected to a head end of the opener drive shaft 3 is installed in the opener block 32. The opener grip 31 includes an opener head 311 facing the hook 10 and an opener slanting surface 3111 for rotating the inner ring 101 is formed on the opener head 311. The opener plate 310 includes an opener plate 310 and the opener plate 310 is L-shaped. One side of the opener plate 310 is fixed to the opener block 32, The head 311 is provided so as to protrude from the other end of the opener plate 310. A bearing or a roller 30 matching the outer circumferential surface of the opener driving cam 22 is provided at the bottom of the opener driving shaft 3.

A stepped block having a smaller diameter is formed at the head end of the opener driving shaft 3 and the opener block 32 is fixed to the stepped block by the hooping structure 321. When the bolt of the hoop is released, the position of the opener block 32 on the opener drive shaft 3 can be adjusted. After adjustment, the bolts of the hoop can be tightened. Therefore, the interval between the inner hook 101 and the opener catch 31 can be adjusted, and the angle of the inner drum rotated in the clockwise direction can be adjusted.

The opener head 311 is formed in a right angle ladder shape, and the opener inclined surface 3111 is formed in a sloped shape of a right angle ladder type, a notch 1101 is formed in the inner drum, Enters the notch 1101, and the opener inclined surface 3111 matches the notch 1101 so that the inner drum rotates clockwise.

The opener head 311 and the opener plate 310 are integrally formed. The opener plate 310 is fixed to the opener block 32 by bolts. When the opener holder 310 is replaced, the bolts are unscrewed.

Since the bearing or roller 30 matching the outer circumferential surface of the opener drive cam 22 is provided at the bottom of the opener drive shaft 3, friction between the opener drive cam and the opener drive shaft can be maximized.

When the main shaft 2 rotates, the main shaft gear 20 and the opener driving cam 22 rotate in the same direction, and the main shaft gear 20 and the opener driving cam 22 are rotated in the same direction, The hook shaft 1 and the outer drum rotate in the same direction. At the same time, under the action of the opener drive cam 22 and the opener restoring spring 33, the opener drive shaft 3 makes a reciprocating linear motion, and the embroidery yarn begins to separate when it is half a wheel wrapping the inner drum , The inner drum (101) is stopped by holding the hook stopper (12). The opener grip 31 of the head end of the opener drive shaft 3 interlocks the inner drum 101 to rotate clockwise so that the pressure between the outer drum and the inner drum is reduced, It is possible to prevent breakage and scarring of the embroidery yarn when the hook stopper 12 is released.

Claims (10)

A hook 10 is provided at the head end of the hook shaft 1 and a hook gear 11 is provided at the foot of the hook shaft 1. The hook shaft 1 is provided with a main shaft 2 and a hook shaft 1 perpendicular to the main shaft 2, The main shaft 2 is provided with a main shaft gear 20 and the hook gear 11. The main shaft gear 20 and the hook gear 11 are engaged with each other, A lower thread detection block 40 is installed on the rear side of the hook 10 and a lower thread detection operation lever 41 is hinged to the lower thread detection block 40, A bobbin sensing operation shaft 4 is installed parallel to one side of the hook shaft 1 and a bobbin detection operating shaft 4 is provided between the operation lever 41 and the bobbin detection block 40. A bobbin detection operation shaft The lower shaft 4 is movably installed in the lower thread sensing operation shaft sleeve 49 and between the lower thread sensing operation shaft sleeve 49 and the lower thread sensing operation shaft 4, Wherein the main shaft 2 is provided with a lower thread sensing drive cam 21 which interacts with the lower end of the lower thread sensing operation shaft 4, The upper and lower thread detection operation levers 41 and 42 are provided with an operation section which interacts with the head end of the lever 41. The lower thread 103 blocks the bottom of the lower thread detection operation lever 41, 45) are installed on the upper and lower sides of the upper and lower arms. The method according to claim 1,
Wherein at least two adjustment holes (401) are provided in the lower thread detection block (40), and the bending part of the end of the torsion spring is engaged with the adjustment hole. The method according to claim 1,
Wherein the actuating part includes an actuating block (43), and an actuating head (44) is provided at the top of the actuating block. The method of claim 3,
Characterized in that the operating head (44) is provided with a bearing or a roller. The method of claim 3,
Wherein the base part (43) of the operating block is installed to rotate on the lower thread sensing operation shaft (4) and is fixed in a hooping structure. The method according to claim 1,
The lower thread detection operation lever 41 includes an arc-shaped bending section 412 at the head end and an L-shaped section 411 at the base, and an L-shaped bending section is provided between the arcuate bending section and the L- Wherein the embroidering machine is provided with an automatic sewing machine. The method according to claim 1,
Characterized in that a rolling head (47) is provided at the bottom of the lower thread sensing operation shaft (4), and the rolling head is a bearing or a roller. The method according to claim 1,
A lock shaft is installed on one side of the lower thread sensing operation shaft 4 and the lock shaft 46 is driven by an electromagnet and a lock head 461 is mounted on the head end of the lock shaft 46 Wherein the lower thread detecting operation shaft is provided with a lock groove corresponding to the lock head. When the main shaft 2 rotates, the main shaft gear 20 and the lower chamber sensing drive cam 21 are rotated so that the hook shaft 1 and the hook 10 rotate along the hook gear 11. At the same time, The driving cam 21 drives the lower thread sensing operation shaft 4 to linearly reciprocate along the lower thread sensing operation shaft sleeve 49;
When the lower chamber 103 is present, the lower chamber 103 and the lower chamber sensing operation shaft 4 simultaneously act on the lower chamber sensing operation lever 41, and the lower chamber sensing operation lever 41 performs a normal reciprocating motion , The lower thread detection operation lever 41 does not reach the detection point of the lower thread break detector 45. When the lower thread breaks, the balance between the lower thread detection operation lever 41 and the lower thread detection operation lever 41 is broken, 41) reaches the detection point of the bottom yarn break detector (45), the bottom yarn break detector (45) sends a closed loop break signal to the controller;
Then, the controller stops the rotation by controlling the spindle motor. 10. The method of claim 9,
When cutting the thread, the lower thread sensing actuation axis 4 must be stopped, at which time the controller sends a signal to the electromagnet and the electromagnet drives the lock axis 46 to move in the direction of the lower thread sensing actuation axis 4 , The locking head (461) is fitted in the locking groove, and the lower thread sensing operation shaft (4) stops moving toward the lower thread sensing operation lever (41).
KR1020140084745A 2014-05-13 2014-07-07 Lower thread breaking auto-sensing machine device and auto-stopping method of embroidery KR101589033B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN201410203267.0A CN103966782B (en) 2014-05-13 2014-05-13 Embroidery machine bottom line broken string auto-induction apparatus and autostop method
CN201410203267.0 2014-05-13

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KR20140105418A KR20140105418A (en) 2014-09-01
KR101589033B1 true KR101589033B1 (en) 2016-02-15

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KR (1) KR101589033B1 (en)
CN (2) CN103966782B (en)
WO (1) WO2015172420A1 (en)

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CN108130660B (en) * 2018-01-27 2023-07-28 舒普智能技术股份有限公司 Automatic winder for sewing machine and sewing machine
KR101979864B1 (en) * 2018-07-03 2019-05-17 이하 Detecting devices for the end of lower thread bobbin and control method thereof
CN114000275B (en) * 2021-11-30 2022-11-11 浙江越隆缝制设备有限公司 Thread cutting method for shuttle box body of embroidery machine

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CN103966782A (en) 2014-08-06
CN103966782B (en) 2015-08-26
CN104963131A (en) 2015-10-07
KR20140105418A (en) 2014-09-01
CN104963131B (en) 2017-03-29
WO2015172420A1 (en) 2015-11-19

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