CN209854351U - Thread cutting device for cylinder type sewing machine - Google Patents
Thread cutting device for cylinder type sewing machine Download PDFInfo
- Publication number
- CN209854351U CN209854351U CN201920273245.XU CN201920273245U CN209854351U CN 209854351 U CN209854351 U CN 209854351U CN 201920273245 U CN201920273245 U CN 201920273245U CN 209854351 U CN209854351 U CN 209854351U
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- knife
- thread
- fixed
- rocker arm
- sewing machine
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Abstract
The utility model provides a tangent line device of cylindric type sewing machine, include: the device comprises a fixed knife, a wire clamping elastic sheet, a movable knife and a transmission mechanism; the fixed knife and the thread clamping elastic sheet are fixedly arranged on a fixed seat, the fixed knife is provided with a fixed blade part, and the front end of the thread clamping elastic sheet is provided with a tongue piece which extends to the lower part of the fixed knife; the movable knife comprises a rocker arm and a knife board which are integrally formed, a first surface of the knife board is provided with a wire guide groove and a movable blade, the rocker arm is used for driving the knife board to reciprocate between a standby position and a thread clamping position in a reciprocating swinging mode, the knife board is normally positioned at the standby position when the sewing machine carries out sewing operation, and the knife board can cooperate with a tongue piece of a thread clamping elastic piece to clamp a cut thread when reaching the thread clamping position.
Description
Technical Field
The utility model relates to a thread cutting device of a sewing machine, in particular to a thread cutting device of a cylindrical sewing machine.
Background
There are many types of known sewing machines, which can be applied to sewing operations of different sewing materials, and one of them is a special sewing machine suitable for sewing shoes, bags or cylinders, which is called a cylinder type sewing machine.
In the new patent issued in taiwan (certificate number: M531960), an automatic thread cutting device for sewing machine is disclosed, comprising: a cutter mechanism, which is provided with a fixed cutter and a movable cutter, wherein the movable cutter is connected with a cutter shaft, and the cutter shaft is provided with a gear; a swing mechanism having a rotating shaft forming a swing center, wherein the rotating shaft is provided with a first swing arm and a second swing arm, the first swing arm is provided with a pressure arm and a propping arm, and the second swing arm is provided with a driving tooth engaged with the gear and can drive the cutter shaft to swing; a cam assembled on the lower shaft of the sewing machine and rotating synchronously with the lower shaft, wherein the cam is positioned on one side of the propping arm and is provided with a deflection curved surface; and the driver is provided with a mandrel which is movably telescopic towards the pressure arm, the mandrel can push the pressure arm to further drive the swinging mechanism to synchronously perform forward direction deflection, so that the pushing arm is contacted with the cam, and the deflection curved surface of the cam pushes the pushing arm again to further drive the swinging mechanism to synchronously perform return direction swinging to complete the thread cutting operation. Because the movable knife and the fixed knife of the thread cutting mechanism are both arranged on the rotating shuttle column barrel, wherein the rotating shaft center of the movable knife is positioned at one side of the rotating shaft center of the rotating shuttle, the size of the rotating shuttle column barrel in the radial direction of the rotating shuttle is increased.
The thread cutting mechanism of the cylindrical sewing machine proposed in the issued taiwan new patent (certificate number: M522964) includes: a fixed blade and a movable blade, which are different from the prior art in that the fixed blade of the M522964 patent is fixedly installed on the inner bottom surface of the needle plate.
SUMMERY OF THE UTILITY MODEL
The main object of the utility model is to provide a tangent line device of cylindric sewing machine.
Based on the technical problem mentioned above, the utility model discloses cylinder type sewing machine's tangent line device's an embodiment structure includes: a fixed knife, a wire clamping elastic sheet, a movable knife and a transmission mechanism; wherein the fixed knife and the thread clamping elastic sheet are fixedly arranged on a fixed seat which is arranged on the top surface of a rotating shuttle column cylinder of the column cylinder type sewing machine, and the fixed knife is provided with a fixed blade part; the front end of the wire clamping elastic sheet is provided with a tongue piece which extends to the position below the fixed knife and lags behind the fixed blade part;
the movable knife comprises a rocker arm and a knife board which are integrally formed, the knife board is provided with a first surface and a second surface which are opposite, wherein the first surface faces the fixed knife and is provided with a wire groove, and a movable blade part is arranged at the joint of the tail end of the wire groove and the first surface; the rocker arm is arranged on the rotating shuttle column barrel in a swinging mode, the rocker arm drives the knife board to reciprocate between a standby position and a thread clamping position in a reciprocating swinging mode, the knife board is normally positioned at the standby position when the sewing machine carries out sewing operation, and the tongue piece of the thread clamping elastic sheet is attached to the second surface of the knife board through the elasticity of the thread clamping elastic sheet when the knife board reaches the thread clamping position;
the transmission mechanism comprises: the cam is used for driving the clutch and the connecting rod mechanism to generate reciprocating motion so as to drive the rocker arm of the movable knife to swing back and forth through the connecting rod mechanism, and the rocker arm drives the movable blade part of the blade plate to pass through the lower edge of the fixed blade part in the process that the blade plate is driven by the rocker arm to move from the standby position to the thread clamping position, so that the thread is cut off by the cooperation of the movable blade part and the fixed blade part.
Wherein link mechanism includes: the game device comprises a first connecting rod, a game rod and a second connecting rod, wherein the second connecting rod is positioned on the side surface of a rotating shuttle column barrel and can reciprocate up and down on the side surface of the rotating shuttle column barrel; the clutch includes: the tail end of the cam rocker arm is rotatably connected with the machine body of the cylindrical sewing machine, the driver is connected with the cam rocker arm and used for selectively pushing the head end of the cam rocker arm to the action position and the non-action position, the head end of the cam rocker arm at the action position can be contacted with the cam, and the head end of the cam rocker arm at the non-action position does not act with the cam.
Wherein the actuator may be any one of a push-pull electromagnet and a pneumatic cylinder.
The fixed knife and the wire clamping elastic sheet are installed on the fixed seat through bolts, the fixed knife and the wire clamping elastic sheet are provided with a long installation hole, and the fixed knife and the wire clamping elastic sheet are installed on the fixed seat after the bolts penetrate through the installation holes.
The utility model discloses cylinder type sewing machine's tangent line device's beneficial effect lies in, has the advantage of easy maintenance and timing.
The details of other functions and embodiments of the present invention are described below with reference to the drawings.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments described in the present application, and other drawings can be obtained by those skilled in the art without creative efforts.
FIG. 1 is an exploded view showing the construction of a thread cutting device of a cylinder type sewing machine according to an embodiment of the present invention;
FIG. 2 is a view showing the structure of a thread cutting device according to an embodiment of the present invention, which is related to the rest of the structure of the pillar type sewing machine;
FIG. 3 is a side view showing the construction of one embodiment of a thread cutting device of a cylinder type sewing machine according to the present invention;
FIG. 4A is a schematic diagram of the thread cutting device of the cylinder type sewing machine according to the present invention, showing the knife plate of the movable knife in the normal standby position;
FIG. 4B is a side view of FIG. 4A;
FIG. 5A is a schematic view of the thread cutting device of the cylinder type sewing machine according to the present invention, showing the knife plate of the movable knife at the thread clamping position;
fig. 5B is a side view of fig. 5A.
Description of the symbols
10 fixed knife 11 fixed blade 12 bolt
13 mounting hole 20 thread clamping spring 21 tongue piece
22 bolt 23 mounting hole 30 movable knife
31 movable blade 32 swing arm 321 rotating shaft bolt
33 cutting board 331 first surface 332 second surface
34 wire groove 341 opening 40 cam
41 Clutch 42 driver 43 cam rocker
431 tail end 432 head end 50 fixing seat
51 rotating shuttle column 52 main shaft 60 needle plate
Tail end of 61 rotating shuttle 70 joystick 701
702 rotating fulcrum 703 head 71 first link
72 second connecting rod B body T suture
Direction of reciprocating swing of rocker arm A1A 2 second link reciprocating direction
Detailed Description
The positional relationship described in the following embodiments includes: the top, bottom, left and right, unless otherwise indicated, are based on the orientation of the elements in the drawings.
Referring first to fig. 1, there is shown an exploded view of a thread cutting device of a cylinder type sewing machine according to an embodiment of the present invention.
The utility model discloses an embodiment structure of bobbin type sewing machine's tangent line device, include: a fixed knife 10, a thread-clamping spring 20, a movable knife 30 and a transmission mechanism.
Wherein the fixed knife 10 and the thread clamping elastic sheet 20 are fixedly arranged on a fixed seat 50, the fixed knife 10 and the thread clamping elastic sheet 20 are positioned below the needle plate 60 (see fig. 2 and 3), the fixed seat 50 is arranged on the top surface of the rotating shuttle column 51, and the fixed knife 10 is provided with a fixed blade part 11; the thread clamping elastic piece 20 is a component made of thin metal sheet and having elasticity, the front end of the thread clamping elastic piece 20 has a tongue piece 21 extending to the lower side of the fixed knife 10, and the tongue piece 21 can cooperate with the movable knife 30 to clamp the thread end after the thread T is cut off (see fig. 5B).
The movable knife 30 includes a rocker 32 and a knife plate 33, the knife plate 33 has a first surface 331 and a second surface 332 (the first surface 331 is on the top and the second surface 332 is on the bottom in the embodiment shown in the figure, see fig. 3), wherein the first surface 331 faces the fixed knife 10, the first surface 331 has a wire groove 34, the front end of the wire groove 34 has an opening 341 for guiding the suture T from the opening 341 into the wire groove 34, the joint of the end of the wire groove 34 and the first surface 331 has a movable edge portion 31, wherein the fixed edge portion 11 and the movable edge portion 31 are cutting surfaces with sharp edges, so that the movable edge portion 31 can cooperatively generate a shearing action when passing through the fixed edge portion 11 to cut the suture T (see fig. 5B).
The rocker 32 of the movable knife 30 is swingably mounted (e.g., by means of a spindle bolt 321) on the rotating shuttle cylinder 51, and the rocker 32 drives the knife plate 33 to reciprocate between a standby position (see fig. 4A) and a thread clamping position (see fig. 4B) by means of reciprocating swing; in a preferred embodiment, the knife plate 33 is located at the top end of the swing arm 32 and extends towards one side of the swing arm 32 along a horizontal direction, the knife plate 33 is normally located at the standby position when the sewing machine performs a sewing operation, the knife plate 33 slides between the fixed knife 10 and the thread clamping elastic piece 20 when the knife plate 33 reaches the thread clamping position, the tongue piece 21 of the thread clamping elastic piece 20 is attached to the second surface 332 of the knife plate 33 by the elastic force of the thread clamping elastic piece 20, and the thread end of the cut thread T is clamped by the cooperation of the tongue piece 21 and the knife plate 33 (see fig. 5B).
The transmission mechanism includes: a cam 40, a clutch 41 and a link mechanism fixed on a main shaft 52 of the cylinder type sewing machine, one end of the link mechanism is connected with the rocker 32 of the movable knife 30, the other end of the link mechanism is connected with the clutch 41, the clutch 41 can be selectively moved to an acting position (see fig. 5A and 5B) and an inactive position (see fig. 4A and 4B), the clutch 41 and the cam 40 in the acting position are contacted, the cam 40 can drive the clutch 41 and the link mechanism to reciprocate, so that the rocker 32 of the movable knife 30 is driven by the link mechanism to reciprocate (see the direction indicated by the arrow a1 in fig. 1), thereby the knife plate 33 of the movable knife 30 is driven to reciprocate between a standby position and a thread clamping position outside the rotating shuttle 61, the movable blade 31 of the knife plate 33 passes through the lower edge of the fixed blade 11 during the process that the rocker 32 drives the knife plate 33 to move from the standby position to the thread clamping position, the thread T is cut by the movable blade 31 and the fixed blade 11 in cooperation, and then the thread end of the cut thread T is clamped between the tongue piece 21 and the second surface 332 of the knife plate 33 when the thread clamping position is reached (see fig. 5B). The tongue piece 21 of the thread clamping elastic piece 20 extends to a position below the fixed knife 10 and behind the fixed edge part 11, and the behind means that the movable knife 30 moves towards the fixed knife 10, firstly cuts the thread T through the cooperation of the movable edge part 31 and the fixed edge part 11, and then the thread end of the cut thread T is clamped by the tongue piece 21 and the movable knife 30 which are located at the behind position (see fig. 5B).
Constructed as a preferred embodiment of the link mechanism, the link mechanism includes: a first link 71, a game lever 70 and a second link 72, the second link 72 is located at the side of the rotating shuttle cylinder 51 and can reciprocate up and down on the side of the rotating shuttle cylinder 51 (see the direction indicated by arrow a2 in fig. 1), the top end of the second link 72 is connected with the swing arm 32 of the movable knife 30, the bottom end of the second link 72 is connected with the tail end 701 of the game lever 70 (see fig. 3), the game lever 70 is swingably mounted on the rotating shuttle cylinder 51 through a rotation fulcrum 702, the head end 703 of the game lever 70 is connected with the tail end of the first link 71, and the rotation fulcrum 702 of the game lever 70 is between the head end 703 and the tail end 701 of the game lever 70.
Wherein the clutch 41 of the transmission mechanism comprises: an actuator 42 and a cam rocker 43, the tail end 431 of the cam rocker 43 is rotatably connected with the machine body B of the cylindrical sewing machine, the actuator 42 is connected with the cam rocker 43 to selectively push the head end 432 of the cam rocker 43 to the active position and the inactive position, wherein the actuator 42 can be any one of a push-pull type electromagnet and a pneumatic cylinder, the head end 432 of the cam rocker 43 in the active position can be contacted with the cam 40, in other words, the clutch 41 in the active position can keep the head end 432 of the cam rocker 43 and the cam 40 in a contact relationship, and the head end 432 of the cam rocker 43 in the inactive position is not contacted with the cam 40; therefore, when the thread cutting action is performed, a user can control the driver 42 to push the head end 432 of the cam rocker 43 to the acting position, so that the head end 432 of the cam rocker 43 and the cam 40 act, and the cam 40 drives the cam rocker 43 and the link mechanism, so as to drive the rocker 32 of the movable knife 30 to swing back and forth, and further drive the knife plate 33 of the movable knife 30 to move back and forth between the standby position and the thread clamping position, and further realize the thread cutting action; on the contrary, when the tangent action is not performed, the driver 42 normally drives the cam rocker 43 to stay at the inactive position.
In the preferred embodiment of the thread cutting device of the cylinder type sewing machine of the present invention, the stationary knife 10 and the thread clamping elastic piece 20 are respectively installed on the fixing base 50 through the bolts 12 and 22, the stationary knife 10 and the thread clamping elastic piece 20 are respectively provided with the elongated installation holes 13 and 23, and the bolts 12 and 22 respectively pass through the installation holes 13 and 23 and then install the stationary knife 10 and the thread clamping elastic piece 20 on the fixing base 50. Therefore, the relative positions of the fixed knife 10, the wire clamping elastic sheet 20 and the knife plate 33 of the movable knife 30 can be conveniently adjusted and adjusted by adjusting the positions of the bolts 12 and 22 in the mounting holes 13 and 23, and the fixed knife 10 and the wire clamping elastic sheet 20 are easy to maintain or replace.
The above-described embodiments and/or implementations are only for illustrating the preferred embodiments and/or implementations of the technology of the present invention, and are not intended to limit the implementations of the technology of the present invention in any way, and those skilled in the art can make modifications or changes to other equivalent embodiments without departing from the scope of the technology disclosed in the present invention, but should be regarded as the technology or implementations substantially the same as the present invention.
Claims (4)
1. A thread cutting device of a cylinder type sewing machine, comprising: a fixed knife, a wire clamping elastic sheet, a movable knife and a transmission mechanism; wherein the fixed knife and the thread clamping elastic sheet are fixedly arranged on a fixed seat which is arranged on the top surface of a rotating shuttle column cylinder of the column cylinder type sewing machine, and the fixed knife is provided with a fixed blade part; the front end of the wire clamping elastic sheet is provided with a tongue piece which extends to the position below the fixed knife and lags behind the fixed blade part;
the movable cutter comprises a rocker arm and a cutter plate which are integrally formed, the cutter plate is provided with a first surface and a second surface which are opposite, the first surface faces the fixed cutter, the first surface is provided with a wire groove, and the joint of the tail end of the wire groove and the first surface is provided with a movable blade part;
the rocker arm is arranged on the rotating shuttle column barrel in a swinging manner, the rocker arm drives the knife board to reciprocate between a standby position and a thread clamping position in a reciprocating swinging manner, the knife board is normally positioned at the standby position when a sewing machine carries out sewing operation, and the tongue piece of the thread clamping elastic sheet is attached to the second surface of the knife board through the elasticity of the thread clamping elastic sheet when the knife board reaches the thread clamping position;
this drive mechanism includes: the cam can drive the clutch and the link mechanism to generate reciprocating motion so as to drive the rocker arm of the movable knife to swing back and forth through the link mechanism, and the movable blade part of the knife board passes through the lower edge of the fixed blade part in the process that the rocker arm drives the knife board to move from the standby position to the thread clamping position, so that the thread is cut off through cooperation of the movable blade part and the fixed blade part.
2. The thread cutting device for a cylinder type sewing machine according to claim 1, wherein the link mechanism comprises: the second connecting rod is positioned on the side surface of the rotating shuttle column barrel and can do reciprocating motion in the vertical direction on the side surface of the rotating shuttle column barrel, the top end of the second connecting rod is connected with the rocker arm of the movable knife, the bottom end of the second connecting rod is connected with the tail end of the game rod, the game rod is arranged on the rotating shuttle column barrel in a swinging way through a rotating fulcrum, the head end of the game rod is connected with the tail end of the first connecting rod, and the rotating fulcrum of the game rod is arranged between the head end and the tail end of the game rod; the clutch includes: the tail end of the cam rocker arm is rotatably connected with the machine body of the cylindrical sewing machine, the driver is connected with the cam rocker arm and used for selectively pushing the head end of the cam rocker arm to the acting position and the non-acting position, the head end of the cam rocker arm at the acting position can be contacted with the cam, and the head end of the cam rocker arm at the non-acting position does not act with the cam.
3. The thread cutting apparatus for a cylinder type sewing machine according to claim 2, wherein the actuator is any one of a push-pull type electromagnet and a pneumatic cylinder.
4. The thread cutting device for a cylinder type sewing machine according to claim 1, wherein the stationary knife and the thread clamping spring are mounted on the holder by a bolt, the stationary knife and the thread clamping spring have an elongated mounting hole, and the bolt passes through the mounting hole to mount the stationary knife and the thread clamping spring on the holder.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920273245.XU CN209854351U (en) | 2019-03-05 | 2019-03-05 | Thread cutting device for cylinder type sewing machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920273245.XU CN209854351U (en) | 2019-03-05 | 2019-03-05 | Thread cutting device for cylinder type sewing machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209854351U true CN209854351U (en) | 2019-12-27 |
Family
ID=68932748
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920273245.XU Withdrawn - After Issue CN209854351U (en) | 2019-03-05 | 2019-03-05 | Thread cutting device for cylinder type sewing machine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209854351U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111501226A (en) * | 2020-06-03 | 2020-08-07 | 张金法 | Thread cutting device for column type sewing machine |
| CN111663258A (en) * | 2019-03-05 | 2020-09-15 | 吴谨明 | Thread cutting device for cylinder type sewing machine |
-
2019
- 2019-03-05 CN CN201920273245.XU patent/CN209854351U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111663258A (en) * | 2019-03-05 | 2020-09-15 | 吴谨明 | Thread cutting device for cylinder type sewing machine |
| CN111501226A (en) * | 2020-06-03 | 2020-08-07 | 张金法 | Thread cutting device for column type sewing machine |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20191227 Effective date of abandoning: 20211126 |
|
| AV01 | Patent right actively abandoned |
Granted publication date: 20191227 Effective date of abandoning: 20211126 |
|
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned |