JP2010051775A - Differential feed control mechanism of sewing machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a control mechanism having a reverse stitching function of a sewing machine and enabling differential feed. <P>SOLUTION: In the control mechanism, the power of a second association component, a fourth association component, a fifth association component, and a sixth association component is transmitted from a transmission shaft capable of changing the reciprocating momentum. The outputs of the second association component and the sixth association component are synchronous and have the same speed, the fourth association component and the fifth association component output synchronously, and either the fourth association component or the fifth association component is capable of changing the reciprocating stroke amount. Thus, a control handle is rotated and one of the association components is changed in stroke amount by a combination of these four association components and two clutches, whereby the rotational speed of the cloth feed wheel of the sewing machine can be controlled as actually required to accomplish the purpose for differential feed of the sewing machine. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a kind of differential cloth feed control mechanism for a sewing machine, and more particularly to a control mechanism capable of performing differential cloth feed with a reverse stitching function of a sewing machine.

  With the continuous development of science and technology and the improvement of economic standards, people increasingly attach importance to the comfort and aesthetics of clothing, and in the process of sewing leather products such as bags, gloves and shoes, various complex designs Therefore, it is necessary to improve the sewing method.

  Currently, there are two types of cloth feeding systems that can realize differential cloth feeding. In other words, it is a tooth type cloth feed and a ring type cloth feed. In the former, the amount of cloth introduced by the front feed teeth is equal to or larger than the amount of cloth introduced by the rear feed teeth (so-called differential ratio), so that the sewing surface is flattened. Or it produces different effects of gathering. In the latter, the relative movement speed of the upper and lower cloth feed wheels is changed by the combination of the upper and lower cloth feed rings and the sewing needle, and the sewing surface is flat or has different gathering effects. Both the tooth type cloth feed and the ring type cloth feed can realize the differential cloth feed of the sewing machine, but the cloth and the feed dog at the time of the tooth type cloth feed are in surface contact, and the cloth of the ring type cloth feed and the cloth feed wheel are points. Therefore, the one that adopts the ring-type cloth feed can smoothly operate the sewing machine, thereby achieving an ideal sewing effect and design effect.

  Existing gauge wheel type cloth feed uses a unidirectional super clutch, and the differential ratio is adjusted by changing the ratio based on the ratio of the center of the connecting rod, but this type does not have a reverse stitching function. In addition, the cloth feed method in which the sewing needle is synchronized with the cloth feed wheel generates a situation in which the sewing needle bites into the cloth. At this time, the cloth feed ring becomes unsynchronized with the sewing needle, and the cloth feed ring and the cloth feed ring are not synchronized. It produces a bad effect of damaging the fabric due to friction.

  An object of the present invention is to provide a differential cloth feed control mechanism for a kind of a ring type cloth feed sewing machine, and to provide reverse sewing and differential cloth feed by attaching the mechanism of the present invention.

The object of the present invention is realized as follows.
The differential cloth feed control mechanism of the sewing machine is used to adjust the feed speed of the upper cloth feed wheel,
Two first oscillating parts and second oscillating parts each receiving power transmission by a transmission shaft capable of changing the amount of reciprocating motion;
A first interlocking part pivoted on the first swinging part; a second interlocking part pivoted on the second swinging part;
A third interlocking part and a fourth interlocking part pivoted on the first interlocking part;
A third oscillating component pivoted on the third interlocking component;
An adjustment mechanism connected to the third oscillating component;
An input shaft having a radial cam and a rotor provided in the groove of the cam;
A cloth feed shaft comprising two clutches, a propulsion ring provided between the left clutch and the right clutch, and a positioning bush provided between the propulsion ring and the two clutches;
A fourth swing component connected to the rotor and the propulsion ring;
A case in which the input shaft and the cloth feed shaft are fixed in the axial direction;
Including the above.

  The differential cloth feed control mechanism of the sewing machine described above is characterized in that a reverse stitching device capable of changing the momentum is provided between the transmission shaft and the main shaft, and the power is transmitted from the main shaft via the reverse stitching device capable of changing the momentum. Thus, the fifth interlocking component and the sixth interlocking component transmitted to the transmission shaft and transmitted with power from the transmission shaft are connected to the lower cloth feed shaft via the clutch.

  The differential cloth feed control mechanism of the sewing machine described above is characterized in that the fifth interlocking component is pivotally mounted on the second swinging component, the sixth interlocking component is pivotally mounted on the fifth swinging component, The first oscillating component, the second oscillating component, and the fifth oscillating component are respectively pivoted on the transmission shaft through the pivot holes.

  The differential cloth feed control mechanism of the sewing machine described above is characterized in that a pivot hole is provided in the first swing part, a pivot hole is provided in the first interlocking part, and a pin passes through these pivot holes. Thus, the first swinging part and the first interlocking part are pivoted.

  The differential cloth feed control mechanism of the sewing machine described above is characterized in that the third interlocking component, the first interlocking component, and the fourth interlocking component are pivoted in order by a pin passing through the pivot hole, The moving part and the third interlocking part are pivoted by a pin passing through the pivot hole.

  The differential cloth feed control mechanism of the above-described sewing machine is characterized in that the fourth swinging part has a J shape, and the fourth swinging part is connected to the rotor through the pivot hole. Is fixedly connected to the propulsion ring by a fixing hole.

  The above-described differential cloth feed control mechanism of the sewing machine is characterized in that the adjustment mechanism includes an adjustment handle, an adjustment panel, and a rotary knob fixed to the third swing part, and the rotary knob and the adjustment handle are connected to each other. The adjusting handle is attached to the sliding groove of the adjusting panel by screws.

  A characteristic of the above-mentioned sewing machine differential cloth feed control mechanism is that a vertical adjustment screw is passed through the adjustment panel, a fitting groove is provided in the adjustment panel, and an adjustment button is fixed in the fitting groove. is there.

  The differential cloth feed control mechanism of the sewing machine described above is characterized in that the input shaft and a pulley are connected, the pulley is connected to another pulley via a synchronous belt, and the pulley and the sewing machine main shaft are connected. is there.

  The differential cloth feed control mechanism of the sewing machine described above is characterized in that the cloth feed shaft is connected to a sprocket, the sprocket is connected to another sprocket via a chain, and the sprocket is connected to another sprocket via a chain. It is connected to the upper cloth feed shaft that controls the movement of the cloth feed wheel.

  In the differential cloth feed control mechanism of the sewing machine of the present invention, four or some interlocking parts are connected to a transmission shaft capable of changing the amount of reciprocating motion, and two interlocking parts are made into one set. 6 interlocking parts) move at the same synchronous speed, and another pair (the fourth interlocking part and the fifth interlocking part) changes the momentum of one of the interlocking parts. And finally the power is transmitted to the upper cloth feed wheel, and the feed amount of the upper cloth feed wheel when the needle is moved is modified, thereby achieving the following effects. That is, when the sewing needle pierces the cloth, the upper and lower cloth feed wheels feed the cloth at the same synchronous speed. When the sewing needle is on the second stage cloth feed on the throat plate, the upper and lower cloth feed rings feed the differential cloth feed. Thus, the cloth is not damaged by friction.

  The present invention employs the above-described technical means, and has the following advantages and positive effects compared with the existing techniques. That is, the cloth feed driver of the present invention employs a bi-directional super clutch, and thus realizes normal sewing and reverse stitching, and adjusts the momentum of the upper cloth feed wheel by adjusting the adjustment mechanism. Based on this, the amount of differential cloth feed can be controlled.

  As shown in FIG. 1 and FIG. 2, the present invention is a kind of differential cloth feed control mechanism of a sewing machine, which is a rectangular frame-shaped case 13, a main shaft 70 that is a power source of the sewing machine, and the main shaft 70 has a momentum change. Power can be sent to the transmission shaft 2 by a possible reverse stitching device (not shown; explanation is omitted because it is an existing technology), and therefore the reciprocating amount of the transmission shaft 2 can be changed. The swing component 1 and the second swing component 9 are pivoted, the first swing component 1 is pivoted with the first interlocking component 3, and the second swing component 9 is pivoted with the second interlocking component 11. . A pivot hole 37 is provided in the first swing component 1, a pivot hole 38 is provided in the first interlocking component 3, and the pin 12 is passed through the pivot holes 37, 38. And the first interlocking part 3 is pivoted. The third interlocking part 4, the first interlocking part 3 and the fourth interlocking part 8 are pivotally provided by the pins 42 through the pivot holes 39, 40 and 41, and the third swinging part 6 and the third interlocking part 4 are pivoted. The pin 5 is pivoted by the holes 43 and 44.

  An adjustment mechanism 631 is connected to the third swing component 6, and the adjustment mechanism 631 includes an adjustment handle 7, an adjustment panel 401, and a rotation knob 411 fixed to the third swing component 6, and the rotation knob 411 and the adjustment handle. 7 is fixedly connected, and the adjustment handle 7 is attached in the sliding groove 421 of the adjustment panel 401 by a screw 701. A vertical adjustment screw 431 is passed through the adjustment panel 401, a fitting groove 441 is further provided in the adjustment panel 401, and the adjustment button 451 is fixed in the fitting groove 441.

  A pulley 14 is provided on the main shaft 70 of the sewing machine, the pulley 14 is connected to another pulley 16 via the synchronous belt 15, and the other pulley 16 is provided on the input shaft 17. Is transmitted to the input shaft 17 through this belt, the input shaft 17 is fixed to the middle part of the case 13 in the axial direction, and a further radial cam 18 is provided on the input shaft 17. A rotor 22 is provided. Due to the transmission of the belt, the cam 18 and the main shaft 70 rotate at the same speed.

  The cloth feed shaft 10 is fixed to the lower part of the case 13 and is provided with two clutches 31 and 32. A propulsion ring 23 is provided between the left clutch 31 and the right clutch 32. The propulsion ring 23 and the two clutches 31 are provided. , 32 are provided with positioning bushes 45, 46. The fourth oscillating component 20 has a J-shape, and the fourth oscillating component 20 is connected to the rotor 22 through a pivot hole 47, and the fourth oscillating component 20 is also connected to the fixing holes 49 and 50. The propulsion ring 23 is fixedly connected. A pivot hole 48 is provided at the bottom of the fourth swing component 20, and the fourth swing component 20 is positioned in the case 13 by an eccentric pin 85 provided in the pivot hole 48. The concave groove of the radial cam 18 is designed according to the necessity of the operation of the fourth oscillating part 20 to realize the left and right oscillating movement of the fourth oscillating part 20. It is driven and continuously coupled with the clutches 31 and 32 to achieve the following operational effects. That is, when the propulsion ring 23 and the left clutch 31 are coupled, the right clutch 32 is necessarily separated. When the propulsion ring 23 and the right clutch 32 are connected, the left clutch 31 is necessarily separated. The cloth feed shaft 10 and the sprocket 26 are connected, and the sprocket 26 is connected to another sprocket 501 through a chain 24, and the other sprocket 501 is moved through the other chain 25 to move the upper cloth feed wheel. Is connected to an upper cloth feed shaft 80 for controlling

  The effect after the assembly of the control mechanism of the present invention is as shown in FIGS.

  As shown in FIGS. 5 and 6, the main shaft 70 is sectorally moved on the transmission shaft 2 by a reverse stitching device (not shown) whose momentum can be changed, and the fifth interlocking component 33 and the sixth driven by the transmission shaft 2. The interlocking part 34 is connected to the lower cloth feed shaft 60 via the clutches 61 and 62, respectively. The fifth interlocking component 33 is pivotally mounted on the second swinging component 9, and the sixth interlocking component 34 is pivotally mounted on the fifth swinging component 71, and the first swinging component 1, the second swinging component 9 and the fifth swinging component 71 are pivoted. Each of the swing parts 71 is combined with the transmission shaft 2 through its pivot hole. The first interlocking component 3 and the second interlocking component 11 are also pivoted on the transmission shaft 2 through the first swinging component 1 and the second swinging component 9, respectively, and the second interlocking component 11 and the right clutch 32 are connected, The interlocking component 3 is connected to the left clutch 31 through the fourth interlocking component 8, the second swinging component 9 is connected to the fifth interlocking component 33 and the second interlocking component 11, and the fifth interlocking component 33 is the lower cloth feed shaft 60. The lower cloth feed wheel 64 is driven by the upper clutch 61. The second interlocking part 11 is connected to the clutch 32 combined with the cloth feed shaft 10, and the sixth interlocking part 34 receiving the drive of the transmission shaft 2 is connected to the clutch 62 combined with the lower cloth feed shaft 60.

  7, 8, 9 and 10 are operation display diagrams of the differential cloth feed control mechanism of the sewing machine of the present invention. The first interlocking part 3 and the third interlocking part 4 are pivoted, the third interlocking part 4 is pivotally connected to the third swinging part 6 by a pin 5, and the other end of the third swinging part 6 is connected to the adjustment handle 7. Connected and fixed to the case 13 in the axial direction. Thus, by rotating the adjustment handle 7, the third interlocking component 4 can change the center of the arc of movement performed in response to the reciprocating motion output from the first interlocking component 3, and when the angle of the adjustment handle 7 is changed, The center of the arc of the interlocking component 4 changes, and the change in the stroke amount of the fourth interlocking component 8 is achieved.

  The pulley 14 combined with the main shaft 70 transmits the power to the other pulley 16 via the synchronous belt 15 and drives the input shaft 17 to cause the radial cam 18 to move in synchronization with the main shaft 70. The J-shaped fourth oscillating component 20 is connected to the radial cam 18 via the shaft 21 and the rotor 22, and the fourth oscillating component 40 is connected to the propulsion ring 23 and receives the drive of the radial cam 18. It moves left and right, and the clutches 31 and 32 are moved in accordance with the main shaft 70. The clutches 31 and 32 form a regular separation, and the powers of the fourth interlocking component 8 and the second interlocking component 11 are combined and fixed. In addition, the sprocket 26 and the chains 24 and 25 are combined to output power to the upper cloth feed shaft 80, and the upper cloth feed shaft 80 finally transmits the power via a fixed transmission mechanism. To 65.

  Overall, the powers of the second interlocking part 11, the fourth interlocking part 8, the fifth interlocking part 33 and the sixth interlocking part 34 of the sewing machine having the differential cloth feed control mechanism of the present invention are all transmitted from the transmission shaft 2. Among them, the outputs of the sixth interlocking component 34 and the second interlocking component 11 are synchronous and the same speed, the fourth interlocking component 8 and the fifth interlocking component 33 are synchronous outputs, and the fourth interlocking component 8 is the third interlocking component 4. The reciprocating stroke amount can be changed through the third swinging part 6 and the adjustment handle 7, and thus four interlocking parts and two sets of clutches (the clutch 31 connected to the fourth interlocking part 8 and the second interlocking part 11). The combination of the clutch 32 connected to the fifth interlocking part 33 and the clutch 62 connected to the sixth interlocking part 34). Turn 7 to get the fourth interlocking part By changing the stroke volume, and adjusting the rotational speed of the upper cloth feed wheel 65 of the sewing machine to the actual need to achieve a differential cloth feed purposes of the sewing machine.

  While the preferred embodiment of the present invention has been described above, it is not intended to limit the scope of the invention, and any modification or alteration in detail that may be made based on the invention belongs to the scope of the invention. .

It is a structure exploded view of the present invention. It is a partial combination display figure of this invention. It is an external appearance three-dimensional view of the present invention. FIG. 3 is another external perspective view of the present invention. It is a transmission path | route display figure of the upper and lower cloth feed rings of this invention. It is a three-dimensional view of a sewing machine to which the present invention is attached. It is an operation | movement display figure of this invention. It is an operation | movement display figure of this invention. It is an operation | movement display figure of this invention. It is an operation | movement display figure of this invention.

Explanation of symbols

A Input shaft hole
B Cloth feed shaft hole C Pivot hole
D Connecting hole E Eccentric pin hole
F Adjustment handle hole 1 First swing part 2 Transmission shaft
3 First interlocking part 4 Third interlocking part 5 Pin 6 Third swinging part 7 Adjustment handle 8 Fourth interlocking part 9 Second swinging part 10 Cloth feed shaft 11 Second interlocking part 12 Pin 13 Case 14 Pulley 15 Synchronous belt 16 Pulley 17 Input shaft 18 Cam 20 Fourth rocking part 21 Shaft 22 Rotor 23 Propulsion ring 24, 25 Chain 26 Sprocket 31, 32 Clutch 33 Fifth interlocking part 34 Sixth interlocking part 37, 38 Pivoting holes 39, 40 , 41 Pivot hole 42 Pins 43, 44 Pivot hole 45, 46 Positioning bush 47 Pivot hole 48 Pivot hole 49, 50 Fixed hole 60 Lower cloth feed shaft 61, 62 Clutch 64 Lower cloth feed shaft 65 Upper cloth feed wheel 70 Main shaft 71 Fifth swinging part 80 Top cloth feed shaft 85 Eccentric pin 401 Adjustment panel 411 Rotating knob 421 Sliding groove 431 Adjustment screw 441 Because the grooves 451 adjustment button 501 sprocket 631 adjustment mechanism 701 screws

Claims (8)

In the differential cloth feed control mechanism of the sewing machine for adjusting the cloth feed speed of the upper cloth feed wheel,
A first oscillating component and a second oscillating component that receive power transmission of a transmission shaft capable of changing the amount of reciprocating motion;
A first interlocking part pivoted on the first swinging part; a second interlocking part pivoted on the second swinging part;
A third interlocking component and a fourth interlocking component pivoted on the first interlocking component;
A third oscillating component pivoted on the third interlocking component;
An adjustment mechanism connected to the third oscillating component;
An input shaft in which a radial cam is combined and a rotor is provided in the concave groove of the cam;
A cloth feed shaft comprising two clutches, a propulsion ring provided between the left clutch and the right clutch, and a positioning bush provided between the propulsion ring and the two clutches;
A fourth swing component connected to the rotor and the propulsion ring;
A case in which the input shaft and the cloth feed shaft are fixed in the axial direction;
A differential cloth feed control mechanism for a sewing machine including the above.   The differential cloth feed control mechanism for a sewing machine according to claim 1, wherein a reverse stitching device capable of changing the momentum is provided between the transmission shaft and the main shaft, and the power is supplied to the reverse stitching device capable of changing the momentum from the main shaft. The fifth interlocking component and the sixth interlocking component that are transmitted to the transmission shaft through which the power is transmitted from the transmission shaft are connected to the lower cloth feed shaft via the clutch, and the fifth interlocking component is connected to the second swinging shaft. The sixth oscillating part is pivotally mounted on the fifth swinging part, and the first swinging part, the second swinging part and the fifth swinging part are pivoted on the transmission shaft. A differential cloth feed control mechanism for a sewing machine, characterized by being provided.   The differential cloth feed control mechanism for a sewing machine according to claim 1 or 2, wherein a pivot hole is provided in the first swing part, a pivot hole is provided in the first interlocking part, and a pin is connected to these pivot parts. A differential cloth feed control mechanism for a sewing machine, wherein the first swinging part and the first interlocking part are pivoted through a hole.   The differential cloth feed control mechanism for a sewing machine according to claim 1 or 2, wherein the third interlocking component, the first interlocking component, and the fourth interlocking component are sequentially provided by pins passing through pivot holes provided respectively. A differential cloth feed control mechanism for a sewing machine, characterized in that the third swinging part and the third interlocking part are pivotally provided by a pin passing through a pivotal hole provided in each.   The differential cloth feed control mechanism for a sewing machine according to claim 1 or 2, wherein the fourth swing component has a J shape, and the fourth swing component is connected to the rotor by a pivot hole, A differential cloth feed control mechanism for a sewing machine, wherein the fourth swing component is fixedly connected to the propulsion ring by a fixing hole.   3. The differential cloth feed control mechanism for a sewing machine according to claim 1, wherein the adjustment mechanism includes an adjustment handle, an adjustment panel, and a rotary knob fixed to the third swing part. The adjustment handle is attached to the slide groove of the adjustment panel with a screw, a vertical adjustment screw is passed through the adjustment panel, a fitting groove is provided in the adjustment panel, and an adjustment button is provided in the fitting groove. A differential cloth feed control mechanism for a sewing machine, characterized by being fixed.   The differential cloth feed control mechanism for a sewing machine according to claim 1 or 2, wherein the input shaft and a pulley are connected, the pulley is connected to another pulley via a synchronous belt, and the other pulley and the sewing machine are connected. A differential cloth feed control mechanism for a sewing machine, characterized in that the main shaft is connected.   The differential cloth feed control mechanism for a sewing machine according to claim 1 or 2, wherein the cloth feed shaft is connected to a sprocket, the sprocket is connected to another sprocket via a chain, and the other sprocket is connected to another sprocket. A differential cloth feed control mechanism for a sewing machine, which is connected to an upper cloth feed shaft for controlling movement of the upper cloth feed wheel via a chain.

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