TWM463745U - Thread-cutting device in cylindrical sewing machine - Google Patents

Description

Tangential device for straight type sewing machine

The utility model relates to a tangential device for a straight-type sewing machine, in particular to a swaying center of a tangential hook plate which can be rotated by an adjusting shaft having an eccentric shaft, so that the tangential hooking plate is centered on the eccentric axis, and the eccentric shaft is used. The distance from the center of the shaft to the center of the pivot pin is the radius of rotation, and the tangent device of the arc-shaped trajectory.

The straight type sewing machine currently used for sewing nozzle-like sewing materials is usually equipped with a set of automatic thread cutting devices, so that after the sewing operation is completed, the sewing thread can be automatically cut to simplify and shorten the sewing time. At present, the conventional tangential device, such as the new patent case No. M395001 of China, "improvement of the automatic thread cutting mechanism of the sewing machine" includes a needle plate, a clip elastic piece, a fixed knife, a movable knife, a pull rod and a movable knife branch. The clamping elastic piece is integrally bent and formed, and the clamping elastic piece is provided with an elliptical hole to be locked in the back of the needle plate by a bolt, and the displacement of the elliptical hole is adjusted to make the clamping elastic piece and the movable knife The positions cooperate with each other to control the clamping force; in addition, the movable knife supporting plate is L-shaped, and the movable knife supporting plate is provided with an elliptical hole, which is locked by bolts in the back of the needle plate, and the movable knife is supported. A convex shaft is disposed on one end of the plate, and the convex shaft is disposed in the first hole of the movable knife, thereby adjusting the front and rear positions of the movable knife by using the elliptical hole of the movable blade supporting plate, and when the pulling rod drives the movable knife to and from the movable blade When driving, the movable knife can finely adjust the angle and accurately compensate the stitcher when crossing the triangle loop formed by the suture.

In the above-mentioned conventional automatic thread cutting mechanism, when the position of the movable knife needs to be adjusted, the bolt of the movable knife support plate must be loosened, and the movable knife support plate is pushed by the finger to change the movable knife to the correct position. The purpose of the position, the entire adjustment process, the mastery of the finger force, is completely dependent on the operator's experience and technology, making the adjustment operation extremely difficult; in addition, since the elliptical hole on the movable knife support plate is in a straight line type, therefore, The movable knife can only be linearly displaced along the long elliptical hole, and the displacement adjustment in other directions cannot be performed, so that the adjustment of the movable knife has a direction limitation, and the operation requirement cannot be completely matched, and the improvement is necessary.

In view of this, the creators of this case have researched and innovated to reveal the tangential device of the straight type sewing machine shown in the present invention.

The purpose of the present invention is to provide a tangential device for a straight-type sewing machine, comprising: an adjusting shaft, which is locked at the bottom of the needle plate of the straight arm of the sewing machine, and includes an eccentric shaft and a shaft hole, so that the axis of the eccentric shaft The axis of the shaft hole is eccentric; the line hook plate is slightly C-shaped, the first end of which is pivotally mounted on the eccentric shaft of the adjusting shaft, and the second end forms a hook line portion, and the tangent line The middle part of the hook plate is provided with a pivot pin; a fixed knife is fixed on the bottom of the needle plate, so that the hook line portion of the tangent hook plate can be closely interlaced with the fixed knife to cut the hooked seam And a linkage rod, slidingly disposed on the straight arm, the first end of which is pivotally connected to the middle section of the tangential hook plate, and the second end of which is connected by an actuating member; When the adjustment shaft slightly adjusts the swing center position of the tangential hook plate, when the actuating member drives the linkage rod to move, the tangential hook plate is centered on the eccentric axis, and the axis of the eccentric shaft is pivoted to the pivot pin. The distance between the centers is the radius of rotation, which is a circular arc, and the needle plate Reciprocating motion within the projection range to reduce the range of the tangential device required for actuation, and thus the straight arm of the sewing machine can be designed The outer diameter can be made smaller for the sewing work of smaller nozzles.

The tangential device of the straight type sewing machine disclosed in the present invention, wherein the adjusting shaft comprises: a base shaft portion having a shaft hole penetrating at a center thereof; and an eccentric shaft protruding eccentrically and axially at the base shaft portion One end. The adjusting shaft is locked to the bottom of the needle plate by a bolt passing through the shaft hole; when the user pre-adjusts the swing center of the tangential hook plate, the bolt can be loosened after the bolt is loosened Rotating the adjustment shaft to change the position of the eccentric shaft, that is, adjusting the swing center of the tangential hook plate, so as to adjust the position of the second end hook line portion of the tangential hook plate, so that the hook line portion can be accurately hooked Pull the stitcher.

The tangential device of the straight type sewing machine disclosed in the present invention, wherein the linkage rod is pivotally mounted on the middle portion of the tangential hook plate by the pivot pin; and the actuating member is slidably placed on the straight arm and linearly moved; If so, the actuating member, the linkage rod and the tangential hook plate form a link device.

The tangential device of the straight type sewing machine disclosed in the present invention, wherein the actuating member is an elongated plate body, and a long guiding groove is disposed, so that the first end of the actuating member is pivotally connected to the second end of the connecting rod, and The second end of the actuating member is pivotally connected to a driving rod of a driving component, the driving rod is reciprocally linearly displaced, and a fixing bracket is locked on the straight arm, and a fixing is fixed on the fixing bracket. The pin is inserted into the long guide groove so that when the actuating member is actuated by the driving rod of the driving element, the straight arm can be stably linearly moved.

The tangential device of the straight-type sewing machine disclosed in the present invention can adjust the swing center of the tangential hook plate only by rotating the adjusting shaft to achieve the purpose of slightly adjusting the swing center of the tangential hook plate, so that the present invention is not only structurally It is more simplified, and it is easier to adjust and operate. It also shows the novelty of this new type and has industrial applicability.

According to the tangential device of the straight type sewing machine disclosed in the present invention, the tangential hook plate can be stably reciprocally displaced on a predetermined path by limiting the effective stroke of the driving element and stabilizing the swing angle of the linkage rod. The design can limit the tangential hooking plate to complete the action of hooking and cutting the suture with a minimum swing angle, so that the sewing machine can make the outer diameter of the straight arm more refined, so as to better the sewing seam. Small-caliber clothing, such as straight tubular sewing such as sleeves.

The desirable entities of the present invention can be clarified by the following illustrations and illustrations.

(101)‧‧‧ Straight arm

(101a)‧‧‧Fixed bracket

(102)‧‧‧ needle board

(103) ‧ ‧ fixed pin

(104)‧‧‧Flexural components

(104a)‧‧‧Adjustment screws

(104b)‧‧‧Forced nuts

(105) ‧‧‧ board

(10) ‧‧‧Adjustment axis

(11) ‧‧‧base shaft

(111)‧‧‧Axis hole

(12) ‧ ‧ eccentric shaft

(13)‧‧‧ bolts

(20)‧‧‧cutting board

(21) ‧ ‧ first end

(22) ‧‧‧ hook line

(23) ‧‧‧ pivot

(30)‧‧‧ fixed knife

(40) ‧‧‧ arc slots

(50)‧‧‧ linkage rod

(51) ‧ ‧ first end

(52) ‧‧‧ second end

(60) ‧‧‧actuation

(60a) ‧ ‧ first end

(60b)‧‧‧second end

(61) ‧‧‧Long guide slot

(70)‧‧‧ Drive components

(71)‧‧‧ drive rod

The first picture is a partial exploded perspective view of the present invention.

The second picture is a three-dimensional diagram of the bottom view structure of the present invention.

The third figure is a three-dimensional schematic diagram of the novel assembly on the straight arm of the sewing machine.

The fourth picture is a schematic diagram of the state of the present invention in the hooking of the suture.

Figure 5: Schematic diagram of the operation of cutting the suture from the fourth figure.

Figure 6: This is a schematic diagram of the new adjustment of the swing center of the tangent hook.

Referring to the first to sixth figures, the present invention relates to a thread cutting device for a straight type sewing machine, comprising: an adjusting shaft (10), a needle plate (102) locked to a straight arm (101) of the sewing machine. The bottom portion includes a shaft hole (111) and an eccentric shaft (12), such that the axis of the eccentric shaft (12) is spaced from the axis of the shaft hole (111) by a distance, and is eccentric; 20), slightly C-shaped, its first end (21) The pivot shaft is mounted on the eccentric shaft (12) of the adjusting shaft (10), the second end thereof forms a hook line portion (22), and a middle portion of the tangential hooking plate (20) is provided with a pivot pin (23); The fixed knife (30) is fixed to the bottom of the needle plate (102), so that the hook line portion (22) of the tangential hook plate (20) can be closely interlaced with the fixed knife (30) to cut off the The threaded groove (40) is recessed at the bottom of the needle plate (102), and the pivot pin (23) of the tangential hook plate (20) is inserted into the curved groove (40) And a linkage rod (50) is slidably disposed on the straight arm (101), the first end (51) of which is pivotally connected to the middle section of the tangential hooking plate (20), and the second end thereof ( 52) is a mover (60) linked; if so, the present invention can be adjusted by the adjustment shaft (10) to adjust the swing center position of the tangent hook plate (20), when the actuating member (60) When the linkage rod (50) is driven to move, the tangential hook plate (20) is centered on the eccentric shaft (12), and the distance from the axis of the eccentric shaft (12) to the center of the pivot pin (23) is rotated. Radius, a circular arc, reciprocating within the projection range of the needle plate (102) to reduce the need for actuation The scope of the sweeping, in turn, allows the straight arm (101) of the sewing machine to be designed so that its outer diameter can be made smaller, so as to be used for sewing work of smaller nozzles such as cuffs and straight cylindrical sewing.

As shown in the first and third figures, the tangential device of the straight type sewing machine disclosed in the present invention, wherein the adjusting shaft (10) comprises: a base shaft portion (11) having a shaft hole (111) in the center thereof; An eccentric shaft (12) is eccentrically and axially protruded from one end of the base shaft portion (11). The adjusting shaft (10) is inserted through the shaft hole (111) by a bolt (13), and the adjusting shaft (10) is locked at the bottom of the needle plate (102); when the user pre-adjusts the cutting hook plate (20) When swinging the center, as shown in the sixth figure, after the bolt (13) is loosened, the position of the eccentric shaft (12) can be changed by rotating the adjusting shaft (10), that is, Adjusting the swing center of the tangential hook plate (20) to adjust the position of the second end hook line portion (22) of the tangential hook plate (20) so that the hook line portion (22) can accurately sew the stitcher .

As shown in the first to fifth figures, the tangent of the straight type sewing machine disclosed by the present invention The device, wherein the linkage rod (50) is pivotally mounted on the middle portion of the tangential hook plate (20) by the pivot pin (23); and the actuating member (60) is slidably disposed on the straight arm (101). And the linear motion; if so, the actuating member (60), the linkage rod (50) and the tangent hook plate (20) constitute a linkage device, and the tangent hook plate (20) and the linkage rod (50) The pivot pin (23) of the pivotal portion projects into the arcuate groove (40).

As shown in the second figure, the tangential device of the straight type sewing machine disclosed in the present invention, wherein the actuating member (60) is an elongated plate body and is provided with a long guiding groove (61) for the actuating member (60). The first end (60a) is pivotally connected to the second end (52) of the linkage rod (50), and the second end (60b) of the actuator (60) is pivotally connected to the driving rod of the driving component (70) (71), the driving rod (71) is linearly reciprocally displaceable, and a fixing bracket (101a) is locked on the straight arm (101), and a fixing pin is mounted on the fixing bracket (101a) (103), the fixing pin (103) is inserted into the long guiding groove (61), and when the actuating member (60) is actuated by the driving rod (71) of the driving element (70), the straight arm can be (101) A person who is stably moving in a straight line.

The tangential device of the straight type sewing machine disclosed in the present invention, wherein the driving element (70) for actuating the actuating member (60) can be a pneumatic cylinder, a hydraulic cylinder or a solenoid valve, and the present invention is not limited.

The tangential device of the straight type sewing machine disclosed in the present invention, wherein an elastic member (104) is locked to the bottom of the needle plate (102), and the free end of the elastic member (104) elastically presses the tangential line The hook plate (20) enables the tangential hook plate (20) to slide against the fixed knife (30) during the pulling back to smoothly cut off the hooked stitch. The elastic member (104) is placed on a carrier plate (105). On the carrier plate (105), an adjusting screw (104a) is fastened to the end of the adjusting screw (104a). On the elastic member (104), and a tightening nut (104b) is locked to the adjusting screw (104a). If the tightening nut (104b) is loosened, the rotating nut (104b) can be rotated. The adjusting screw (104a) adjusts the pressure of the elastic element (104) to press the tangent hook plate (20).

According to the tangential device of the straight type sewing machine disclosed in the present invention, when adjusting the swing center of the tangential hook plate (20), as shown in the sixth figure, it is only necessary to rotate the adjustment shaft (10) to achieve a slight adjustment of the tangential line. The purpose of the swinging center of the hook plate (20) [as shown in the imaginary line of the sixth figure, the position of the tangent hook plate (20) after adjustment], so that the present invention is not only simpler in structure, but also more in adjustment operation. For the sake of simplicity and speed, the novelty of the novel is presented and industrially utilized.

The tangential device of the straight type sewing machine disclosed by the present invention limits and stabilizes the swing angle of the linkage rod by the effective stroke of the driving member (70), so that the tangential hook plate (20) can stably reciprocate on a predetermined path. Displacement, by such a design, the tangential hooking plate (20) can be restricted to complete the action of hooking and cutting the suture with a minimum swing angle, so that the sewing machine can be designed on the straight arm (101). The outer diameter is more thinner, so as to sewn a smaller diameter garment, such as a straight tubular sewing such as a sleeve tube.

The structure and shape disclosed in the present invention can be modified and applied without departing from the spirit and scope of the present invention. The present invention is not limited to the above embodiments.

(101a)‧‧‧Fixed bracket

(102)‧‧‧ needle board

(103) ‧ ‧ fixed pin

(104)‧‧‧Flexural components

(104a)‧‧‧Adjustment screws

(104b)‧‧‧Forced nuts

(105) ‧‧‧ board

(10) ‧‧‧Adjustment axis

(11) ‧‧‧base shaft

(13)‧‧‧ bolts

(20)‧‧‧cutting board

(22) ‧‧‧ hook line

(30)‧‧‧ fixed knife

(40) ‧‧‧ arc slots

(50)‧‧‧ linkage rod

(51) ‧ ‧ first end

(52) ‧‧‧ second end

(60) ‧‧‧actuation

(61) ‧‧‧Long guide slot

(60a) ‧ ‧ first end

(70)‧‧‧ Drive components

(71)‧‧‧ drive rod

Claims (9)

The tangential device of the straight type sewing machine comprises: an adjusting shaft, which is locked at the bottom of the needle plate of the straight arm of the sewing machine, and includes a shaft hole and an eccentric shaft, so that the axis of the eccentric shaft is separated from the axis of the shaft hole a spacing, which is eccentric; a tangential hooking plate, slightly C-shaped, the first end of which is pivotally mounted on the eccentric shaft of the adjusting shaft, the second end of which forms a hook line portion, and the middle portion of the tangential hooking plate is provided a pivoting member; a fixed knife fixed to the bottom of the needle plate, so that the hook line portion of the tangential hook plate can be interlaced with the fixed knife; and the interlocking rod is slidably disposed on the straight arm The first end is pivotally connected to the middle section of the tangential hook plate, and the second end is connected by an actuating member. The tangential device of the straight type sewing machine according to the first aspect of the invention, wherein the adjusting shaft comprises: a base shaft portion having a shaft hole in a center thereof; and an eccentric shaft eccentrically and axially protruding At one end of the base shaft portion; the adjustment shaft is passed through the shaft hole through a bolt, and the adjustment shaft is locked to the bottom of the needle plate. The tangential device of the straight type sewing machine according to claim 1, wherein the actuating member is slidably placed on the straight arm and is in a linear motion. The tangential device of the straight type sewing machine according to claim 3, wherein the actuating member is an elongated plate body, and a long guiding groove is disposed, so that the first end of the actuating member is pivotally connected to the linking rod a second end, wherein the second end of the actuating member is pivotally connected to a driving rod of the driving component, and a fixing bracket is locked to the straight arm, and a fixing pin is mounted on the fixing bracket to fix the fixing pin Piercing into the long guide groove. The tangential device of the straight type sewing machine according to the fourth aspect of the invention, wherein the driving element for actuating the actuating member is a pneumatic cylinder. A tangential device for a straight type sewing machine according to claim 4, wherein the actuating device is used The driving element of the moving part can be a hydraulic cylinder. The tangential device of the straight type sewing machine according to the fourth aspect of the invention, wherein the driving element for actuating the actuating member is a solenoid valve. The tangential device of the straight type sewing machine according to the fourth aspect of the invention, wherein an elastic member is locked at a bottom of the needle plate to elastically press the tangential hook plate so that the tangential hook plate can be pulled back. The slider is placed against the fixed knife. The tangential device of the straight type sewing machine according to claim 8, wherein the elastic member is placed on a carrier plate, and an adjusting screw is arranged on the carrier plate to make the end of the adjusting screw Relying on the elastic member, and locking a tightening nut on the adjusting screw.