CN104894766B - Self-locking device of sewing machine - Google Patents
Self-locking device of sewing machine Download PDFInfo
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- CN104894766B CN104894766B CN201510305476.0A CN201510305476A CN104894766B CN 104894766 B CN104894766 B CN 104894766B CN 201510305476 A CN201510305476 A CN 201510305476A CN 104894766 B CN104894766 B CN 104894766B
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- limiting plate
- ratchet pawl
- self
- sewing machine
- locking device
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Abstract
The invention belongs to the technical field of sewing machines and discloses a self-locking device of a sewing machine. A driver is connected with an actuating lever and drives the actuating lever to rotate around a hinge joint position. the actuating lever is hinged to one end of a safety base, a first limiting plate with a reset function is arrange at the other end of the safety base and is capable of rotating around the hinge position and resetting, and an automatic resetting mechanism is arranged on the safety base. A second limiting plate is fixedly arranged on a ratchet pawl B, a ratchet pawl A and the ratchet pawl B are capable of swinging around a hinge bolt, a limiting bar is arranged on the second limiting plate, and the other end of the safety seat and one end of the first limiting plate clamp the limiting bar to achieve self-locking. The ratchet pawl A extends out to form a protrusive pawl, and a transmission rod props the ratchet pawl A upwardly to enable the limiting bar on the second limiting plate to leave the other end of the safety seat and one end of the first limiting plate to achieve unlocking. The self-locking device of the sewing machine has the advantages that an upper thread shearing mechanism is prevented from being damaged, needle breakage is avoided, safety and reliability in using are achieved, and orderly production is guaranteed.
Description
Technical field：
The invention belongs to sewing machine technique field, refers in particular to a kind of self-locking device of sewing machine.
Background technology：
At present, 781 straight drives be not provided with auto-lock function on lockstitch button holder, occur that mechanical lock is not multiple without auto-lock function
Position, when operative's error can then cause upper thread cutting mechanism to be broken, the situation that eedle is interrupted occurs, and ultimately results in sewing machine
Cannot normal work, affect manufacturing schedule.
The content of the invention：
It is an object of the invention to provide a kind of self-locking dress simple to operation, guaranteeing to produce the sewing machine for carrying out in order
Put.
What the present invention was realized in：
A kind of self-locking device of sewing machine, includes starting bar that driver, one end be hinged on casing, by hinge spiral shell
Nail is connected to the ratchet pawl B on casing and ratchet pawl A, and driver connection starting bar simultaneously drives starting bar to rotate around hinged place, peace
With starting bar is hinged, the other end is provided with the first limiting plate with reset function, the first limiting plate can be around even for one end of full base
The place of connecing rotates and resets, and automatic reset mechanism is provided with safety basement；Ratchet pawl A, ratchet pawl B band auto-reset function,
The second limiting plate is installed with ratchet pawl B, ratchet pawl A, ratchet pawl B around hinges bolt swing, and the top of the second limiting plate sets
Positive stop strip is clamped realize self-locking in the one end for being equipped with positive stop strip, the other end of safety basement and the first limiting plate；On ratchet pawl A to
Dog is extended with outward, and the upper end of drive link is in contact with it connection, and drive link pushes up upwards dog rotates ratchet pawl A around hinges bolt
So that the positive stop strip of the second limiting plate leaves the other end of safety basement and unblock is realized in one end of the first limiting plate.
In above-mentioned technical proposal, on the casing that the automatic reset mechanism refers to above safety basement spiral shell is provided with
Nail, is provided with through hole on safety basement, and one end of extension spring is hung on through hole, the other end is hung on screw.
In above-mentioned technical proposal, the ratchet pawl A refer to auto-reset function be provided with the lower end of ratchet pawl A it is logical
Hole, is bolted with screw on the casing of ratchet pawl A sides, and one end of extension spring is hung on through hole, the other end is hung on screw.
In above-mentioned technical proposal, the ratchet pawl B is referred to auto-reset function and the bottom of ratchet pawl A is provided with spiral shell
Nail, is set with torsion spring on hinge bolt, and one end of torsion spring is hung on screw, the other end is arranged on ratchet pawl B.
In above-mentioned technical proposal, the other end of the safety basement is provided with notch, and one end of the first limiting plate is arranged
There is convex mouth, notch realizes self-locking with the positive stop strip that convex mouth is matched for clamping tightly on the second limiting plate.
In above-mentioned technical proposal, described safety basement is connected with the first limiting plate by axial screw, and first is spacing
Plate swings around axial screw；It is set with torsion spring outside axial screw, one end of torsion spring is arranged on the first limiting plate, the other end is arranged
The auto-reset function of the first limiting plate is formed on safety basement.
In above-mentioned technical proposal, the baseplane of the other end of described safety basement is arcwall face, spacing when locking
Bar arcuately face movement.
In above-mentioned technical proposal, the driver is connected by connecting rod with starting bar, the motion bar of driver and company
One end of fishplate bar is hinged, and is hinged in the middle part of the other end of connecting plate and starting bar.
In above-mentioned technical proposal, limiting plate is installed with the casing of described connecting plate side, one end of limiting plate is consolidated
It is located on casing, the other end is arranged on the outside of connecting plate.
In above-mentioned technical proposal, the housing of described driver is fixed on casing or on side cover plate, is set on housing
It is equipped with for the bar hole of adjustment driver right position, screw is fixed through bar hole.
Present invention advantage prominent compared to existing technology is：
1st, the present invention is under self-locking state, starting bar will not action, even if face scissors is not when electromagnet fails or plays seam
In the case of energy normal reset, also it is not result in that thread cutting mechanism breaks, interrupts eedle, it is safe and reliable, it is to avoid because above cutting
Line mechanism breaks and eedle interrupts a series of troubles brought, it is ensured that production is carried out in order；
2nd, present invention unblock only need to drive drive link to push up upwards, simple to operation；
3rd, by solenoid actuated, electromagnet action is driven self-locking action of the invention by controller, automation mechanized operation.
Description of the drawings：
Fig. 1 is the exploded perspective view of the present invention；
Fig. 2 is one of schematic diagram of the present invention；
Fig. 3 is the two of the schematic diagram of the present invention；
Fig. 4 is one of schematic diagram that the present invention is arranged on casing；
Fig. 5 is the two of the schematic diagram that the present invention is arranged on casing.
Specific embodiment：
Below with specific embodiment, the invention will be further described, referring to Fig. 1-5：
A kind of self-locking device of sewing machine, includes driver, one end and is hinged on opening on casing 7 by hinge screws 22
Lever 4, the ratchet pawl B12 and ratchet pawl A11 being connected to by hinge bolt 13 on casing 7, driver can be using cylinder or electricity
Magnet 1, the present embodiment makees concrete introduction using electromagnet 1.Electromagnet 1 connects starting bar 4 and drives starting bar by connecting plate 3
4 around hinge screws 22 are rotated, one end of safety basement 5 be connected in hinge screws 22 realize with starting bar be hinged, the other end sets
The first limiting plate 9 with reset function is equipped with, the first limiting plate 9 can be rotated around junction and resetted, be provided with safety basement 5
Automatic reset mechanism；Ratchet pawl A11, ratchet pawl B12 band auto-reset function, is installed with ratchet pawl B12 by screw
Second limiting plate 17, ratchet pawl A11, ratchet pawl B12 around hinges bolt 13 swing, and the top of the second limiting plate 17 arranges limited location
Positive stop strip 18 is clamped and realizes self-locking in one end of bar 18, the other end of safety basement 5 and the first limiting plate 9；On ratchet pawl A11 to
Dog 19 is extended with outward, and the upper end of drive link 20 is in contact with it connection, and drive link 20 pushes up upwards dog 19 and makes ratchet pawl A11 around hinge
Chain bolt 13 is rotated so that the positive stop strip 18 of the second limiting plate 17 leaves the other end of safety basement 5 and the first limiting plate 9
Realize unblock in one end.
In above-mentioned technical proposal, the automatic reset mechanism is referred to and is provided with spiral shell on the casing 7 of the top of safety basement 5
Nail 34, is provided with through hole on safety basement 5, and one end of extension spring 6 is hung on through hole, the other end is hung on screw 34.
In above-mentioned technical proposal, the ratchet pawl A11 is referred to auto-reset function and arranged in the lower end of ratchet pawl A11
There is through hole 14, be bolted with screw 15 on the casing 7 of ratchet pawl A11 sides, one end of extension spring 16 is hung on through hole 14, another
End is hung on screw 15.
In above-mentioned technical proposal, the ratchet pawl B12 is referred to auto-reset function and arranged in the bottom of ratchet pawl A11
There is screw 32, be set with torsion spring 33 on hinge bolt 13, one end of torsion spring 33 is hung on screw 32, the other end is arranged on spine
On tire B12.
In above-mentioned technical proposal, the other end of the safety basement 5 is provided with notch 8, and one end of the first limiting plate 9 sets
Convex mouth 10 is equipped with, notch 8 realizes self-locking with the positive stop strip 18 that convex mouth 10 is matched for clamping tightly on the second limiting plate 17.
In above-mentioned technical proposal, described safety basement 5 is connected with the first limiting plate 9 by axial screw 23, and first
Limiting plate 9 swings around axial screw 23；Torsion spring 25 is set with outside axial screw 23, one end of torsion spring 25 is arranged on the first limiting plate
On 9, the other end be arranged on safety basement 5 auto-reset function for forming the first limiting plate 9.
In above-mentioned technical proposal, the baseplane of the other end of described safety basement 5 is arcwall face 21, when locking,
Positive stop strip 18 arcuately move by face 21, seamlessly transits.
In above-mentioned technical proposal, the iron core 2 of the electromagnet 1 is connected by connecting plate 3 with starting bar 4, electromagnet 1
Iron core 2 is hinged with one end of connecting plate 3, and the other end and the middle part of starting bar 4 of connecting plate 3 are hinged.
In above-mentioned technical proposal, limiting plate 26 is installed with the casing 7 of the described side of connecting plate 3, limiting plate 26
One end is installed on casing 7, the other end is arranged on the outside of connecting plate 3.
The limiting plate 26 is three flaps, and bar hole 27 is provided with the first vertical plate, and bar hole 27 is easy to fine setting spacing
The position of plate 26, limiting plate 26 is fixed by screws on casing 7, the second vertical plate is positioned at the outside of connecting plate 3, it is ensured that iron core
2 will not sideslip when flexible.
In above-mentioned technical proposal, the housing 29 of described electromagnet 1 is fixed on casing 7 or on side cover plate 30, in shell
The bar hole 31 for adjustment driver right position is provided with body 29, screw is fixed through bar hole 31, is easy to micro-
Adjust the position of electromagnet 1.
The principle of mechanism is：
Before sewing, spring 6 is hung during inactive state and hauls safety basement 5, starting bar 4 is at maximum position counterclockwise；Open
Starting bar 4 receives the clockwise movement of 1 pulling force around hinge screw of electromagnet 22, safety basement 5 to be fixed on starting bar 4 and put together during the beginning
It is dynamic.
When the notch 8 of safety basement 5 moves to the upper edge of the first limiting plate 9, because ratchet pawl B12 receives torsion spring 33 counterclockwise
Power, the positive stop strip 18 of the second limiting plate 17 can be stuck between the convex mouth 10 of the limiting plate 9 of notch 8 and first of safety basement 4 real
Existing self-locking.Now starting bar 4 can be stuck, it is impossible to rotate.Because the middle part of starting bar 4 is also connected with loose ends connecting rod 35, loose ends
Connecting rod 35 be hinged a linkage control scissors before and after limiting plate position, rise seam when, effectively prevent face cut move forward and backward it is ineffective
Living, when causing face to cut non-normal reset, eedle breaks the problem of face shearing machine structure.
When sewing is completed, drive link 20 can be moved upwards, headed on ratchet pawl A12 and done clockwise movement, ratchet pawl A12 meetings
Ratchet pawl B11 is driven to do clockwise movement, now the positive stop strip 18 of the second limiting plate 17 can be from the notch 8 of safety basement 4 and the
Drop out in the draw-in groove that the convex mouth 10 of one limiting plate 9 is formed, when control electromagnet 1 suction fails, starting bar 4 hangs the effect of spring 6
Under reset at maximum position counterclockwise, complete a stitch cycle.
Above-described embodiment is only one of presently preferred embodiments of the present invention, not limits the practical range of the present invention with this, therefore：
The equivalence changes that all shapes under this invention, structure, principle are done, all should be covered by within protection scope of the present invention.
Claims (10)
1. a kind of self-locking device of sewing machine, it is characterised in that：Include starting bar that driver, one end be hinged on casing,
Ratchet pawl B on casing and ratchet pawl A is connected to by hinge bolt, driver connection starting bar simultaneously drives starting bar around being hinged
Place rotates, and one end of safety basement is with starting bar is hinged, the other end is provided with the first limiting plate with reset function, and first is spacing
Plate can be rotated around junction and resetted, and automatic reset mechanism is provided with safety basement；Ratchet pawl A, ratchet pawl B band is automatically multiple
Bit function, is installed with the second limiting plate on ratchet pawl B, and ratchet pawl A, ratchet pawl B around hinges bolt swing, the second limiting plate
Top is provided with one end of positive stop strip, the other end of safety basement and the first limiting plate clamps positive stop strip and realizes self-locking；Ratchet
Dog is outward extended with pawl A, the upper end of drive link is in contact with it connection, and drive link pushes up upwards dog and makes ratchet pawl A around hinges
Bolt is rotated so that the positive stop strip of the second limiting plate leaves the other end of safety basement and solution is realized in one end of the first limiting plate
Lock.
2. the self-locking device of a kind of sewing machine according to claim 1, it is characterised in that：The automatic reset mechanism is referred to
Screw is provided with casing above safety basement, through hole is provided with safety basement, one end of extension spring is hung on through hole
The upper, other end is hung on screw.
3. the self-locking device of a kind of sewing machine according to claim 1, it is characterised in that：The ratchet pawl A bands are automatically multiple
Bit function refers to and the lower end of ratchet pawl A is provided with through hole, is bolted with screw on the casing of ratchet pawl A sides, the one of extension spring
End is hung on through hole, the other end is hung on screw.
4. the self-locking device of a kind of sewing machine according to claim 1, it is characterised in that：The ratchet pawl B bands are automatically multiple
Bit function refers to and the bottom of ratchet pawl A is provided with screw, and torsion spring is set with hinge bolt, and one end of torsion spring is hung on spiral shell
Nail on, the other end is arranged on ratchet pawl B.
5. the self-locking device of a kind of sewing machine according to claim 1, it is characterised in that：The other end of the safety basement
Notch is provided with, one end of the first limiting plate is provided with convex mouth, and notch is matched for clamping tightly the positive stop strip on the second limiting plate with convex mouth
Realize self-locking.
6. a kind of self-locking device of sewing machine according to claim 1 or 5, it is characterised in that：Described safety basement with
First limiting plate is connected by axial screw, and the first limiting plate swings around axial screw；Torsion spring, torsion spring are set with outside axial screw
One end be arranged on the first limiting plate, the other end is arranged on safety basement the auto-reset function for forming the first limiting plate.
7. the self-locking device of a kind of sewing machine according to claim 6, it is characterised in that：Described safety basement it is another
The baseplane at end is arcwall face, when locking, positive stop strip arcuately face movement.
8. the self-locking device of a kind of sewing machine according to claim 1, it is characterised in that：The driver passes through connecting plate
It is connected with starting bar, the motion bar of driver is hinged with one end of connecting plate, the other end of connecting plate cuts with scissors with the middle part of starting bar
Connect.
9. the self-locking device of a kind of sewing machine according to claim 8, it is characterised in that：The machine of described connecting plate side
It is installed with limiting plate on shell, one end of limiting plate is installed on casing, the other end is arranged on the outside of connecting plate.
10. the self-locking device of a kind of sewing machine according to claim 9, it is characterised in that：The housing of described driver
It is fixed on casing or on side cover plate, is provided with housing for the bar hole of adjustment driver right position, screw is passed through
Bar hole is fixed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510305476.0A CN104894766B (en) | 2015-06-05 | 2015-06-05 | Self-locking device of sewing machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510305476.0A CN104894766B (en) | 2015-06-05 | 2015-06-05 | Self-locking device of sewing machine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104894766A CN104894766A (en) | 2015-09-09 |
| CN104894766B true CN104894766B (en) | 2017-05-10 |
Family
ID=54027702
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510305476.0A Active CN104894766B (en) | 2015-06-05 | 2015-06-05 | Self-locking device of sewing machine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104894766B (en) |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1744678A (en) * | 1928-04-12 | 1930-01-21 | William R Rogers | Automatic lock stop for sewing machines |
| JP3633676B2 (en) * | 1995-07-28 | 2005-03-30 | 蛇の目ミシン工業株式会社 | Safety device in edge stitch machine |
| JP5095314B2 (en) * | 2007-09-03 | 2012-12-12 | Ｊｕｋｉ株式会社 | sewing machine |
| CN104278444B (en) * | 2013-07-10 | 2016-06-15 | 拓卡奔马机电科技有限公司 | The type throwing mechanism of sewing machine |
| CN204690294U (en) * | 2015-06-05 | 2015-10-07 | 拓卡奔马机电科技有限公司 | A kind of self-locking device of Sewing machines |
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2015
- 2015-06-05 CN CN201510305476.0A patent/CN104894766B/en active Active
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| Publication number | Publication date |
|---|---|
| CN104894766A (en) | 2015-09-09 |
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