TWM526582U - Cloth feeding teeth automatic route adjusting device of sewing machine - Google Patents

Description

Feeding tooth automatic stroke adjustment device of sewing machine

The utility model relates to a feeding stroke automatic stroke adjusting device of a sewing machine, in particular to a device which can change the feeding stroke during the sewing process.

When the two cloths are sewn together, at the beginning of the sewing of the two fabrics and the end of the sewing, it is often easy to pull due to external force, causing loose or broken stitches, so at the beginning of the sewing of the two pieces of cloth. With the sewing terminal, it is necessary to have a more dense sewing pitch to solve the problem of loose or broken seam.

However, the feeding stroke of the sewing machine feed tooth is a fixed stroke during the sewing process. As shown in the first figure, that is, the sewing machine needle, the needle spacing (D1) generated on the workpiece is constant. As a fixed value, the conventional sewing machine cannot solve the problem that the two pieces of cloth are loose or broken at the start end of the sewing seam and the sewing end.

In view of this, the creators of the present invention have added research and innovation to reveal the automatic stroke adjustment device for the feed teeth of the sewing machine of the present invention.

The purpose of the present invention is to provide a feed tooth automatic stroke adjusting device for a sewing machine, wherein the feed tooth is fixed on a feed tooth link, and the middle portion of the feed tooth link is pivotally connected with a linkage rod, and The linkage rod is pivotally connected to a guiding block, and the guiding block is slidably disposed in the linkage groove of the rocker arm. The feeding tooth automatic stroke adjusting device further comprises: an actuating component, comprising an actuating lever, so that the actuating lever The rod is used for interlocking the linkage rod displacement to adjust the distance between the guide block of the linkage rod and the swing center of the rocker arm; and a sensor for triggering a signal to drive the actuating member of the actuating member to extend outward or Pull back.

The automatic tooth stroke adjusting device of the sewing machine disclosed in the present invention further comprises: a first connecting rod, the first end of the first connecting rod is connected to the linkage rod, and the second end of the first connecting rod is pivoted Connected to a guide shaft; a second link, the first end of which is coupled with a button, so that the second link is rotated in conjunction with the button, and the second end of the second link is provided with a push pin; And a dialing plate, the middle portion of the dialing plate is pivotally mounted on a rotating shaft, and the first end of the dialing plate is recessed with a sliding slot for slidingly guiding the guiding shaft, and the second end of the dialing plate is disposed There is a long slot to allow the push pin to be placed inside.

The automatic tooth stroke adjusting device of the sewing machine disclosed in the present invention can be used to trigger a signal before the sensing object approaches the needle of the sewing machine or before the workpiece leaves the sewing machine needle. Actuating the actuating member of the actuating member to move the guide block of the linkage rod to the swing center of the rocker arm, and returning the actuating rod after a period of time, even if the work object is in the front and the end of the sewn, The following stitches are sewn in a denser manner, while the other parts are sewn at the original set spacing, so that the work can be more securely stitched at the beginning and end of the seam. Due to the change of the above-mentioned feeding stroke, the system is automatically completed, and no adjustment by the staff is required, which hinders the continuous operation of the sewing work, and the novelty and practicability of the novel are obvious.

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

Referring to the second to seventh figures, the present invention relates to a feed tooth automatic stroke adjusting device for a sewing machine, wherein the feed tooth (T) is fixed to a feed tooth link (11), The middle portion of the feed tooth link (11) is pivotally connected to a linkage rod (12), and the linkage rod (12) is pivotally connected to a guide block (121), so that the guide block (121) is slidably disposed on a rocker arm ( The linkage groove (131) of 13) is characterized in that the feed tooth automatic stroke adjusting device further comprises: an actuating member (20), comprising an actuating rod (21) for interlocking the actuating rod (21) The linkage rod (12) is deflected by the pivoting center (110) of the linkage rod (12) and the feed dog link (11) to adjust the guide block (121) of the linkage rod (12) and the rocker arm (13) a distance between the swing centers (130); and a sensor (30) for triggering a signal to drive the actuator (21) of the actuating member (20) to extend or pull back.

As shown in the second figure, the feed tooth automatic stroke adjusting device of the sewing machine disclosed in the present invention further comprises: a first link (40) for connecting the first end (41) of the first link (40) The linkage rod (12), and the second end (42) of the first link (40) is pivotally connected to a guide shaft (421); a second link (50) is pivotally mounted on the shell of the sewing machine The first end (51) is coupled to a button (60) such that the second link (50) rotates in conjunction with the button (60), and the second end of the second link (50) (52) protruding a push pin (521); and a dial (70), the middle portion of the dial (70) is pivotally mounted on a rotating shaft (80), and the first of the dial (70) The end (71) is provided with a sliding slot (711) for slidingly sliding the guiding shaft (421), and the second end (72) of the dialing plate (70) is provided with a long slot (721) for The push pin (521) is worn inside. If the dial button (60) is turned, the push pin (521) of the second end (52) of the second link (50) can be used to dial the dial (70) by means of the dial ( 70) The chute (711) interlocks the second end (42) of the first link (40) to drive the linkage rod (12) according to the pivotal center of the feed tooth link (11) (110) Rotating, thereby adjusting the distance between the guide block (121) of the linkage lever (12) and the swing center (130) of the rocker arm (13), to achieve the purpose of adjusting the feed dog feed stroke.

The first end (41) of the first connecting rod (40) is integrally connected to the linkage rod (12), and the present invention is not limited.

As shown in the second, third, and fourth figures, the automatic tooth stroke adjusting device of the sewing machine of the present invention, wherein the button (60) is coupled to the actuating member (21) of the actuating member (20); The actuating lever (21) of the actuating member (20) and the dial (60) are connected by a universal joint (61), so that the actuating lever (21) can smoothly push the dial (60).

The automatic tooth stroke adjusting device of the sewing machine disclosed in the present invention, in application, as shown in the sixth figure, allows the sensor (30) to sense that the workpiece (P) is close to the needle of the sewing machine (N) Before [that is, sensing the work object (P) through the sensing area], a signal is triggered to drive the actuator (21) of the actuating element (20) to displace the guide block of the linkage rod (12) (121) Approaching the swing center (130) of the rocker arm (13), that is, displacing toward the R1 direction of the sixth figure, so when the rocker arm (13) swings according to its swing center (130), the linkage rod (12) The stroke of the feed dog link (11) is shortened compared with the state shown in the fifth figure, so that the sewing machine sewing pitch is reduced, and the sewing machine is densely sewn on the work object (P) to enhance the work (P) ) the degree of reliability in the front section of the sewing thread; and after a period of time, the driving rod (21) is driven back, as shown in the direction R2 of the seventh figure, so that the guiding block (121) of the linkage rod (12) is kept away from The swing center (130) of the rocker arm (13) restores the originally set sewing pitch to perform the sewing.

The automatic tooth stroke adjusting device of the sewing machine disclosed in the present invention can be applied to the sensor (30) before the sensing workpiece (P) leaves the sewing machine needle (N) [ie, in the sensing area sense The workpiece (P) cannot be detected. As shown in the eighth figure, a signal is triggered to drive the actuation rod (21) of the actuation member (20) to displace the guide block (121) of the linkage rod (12). Near the swing center (130) of the rocker arm (13), that is, when the rocker arm (13) swings according to its swing center (130), the linkage rod (12) interlocks the feed dog link (11) The stroke will be shortened again, so that the sewing machine sewing pitch is reduced, and even if the sewing thread is more densely sewn on the work object (P), the work piece (P) is improved in the final stage of the sewing thread. Therefore, the finished sewing state, as shown in the ninth figure, will present a denser needle spacing (D2) at the beginning (S) and the final (E) of the sewing line, and The lower needle spacing (D3) between the starting segment (S) and the final segment (E) is relatively large, that is, D3 > D2.

The automatic tooth stroke adjusting device of the sewing machine disclosed in the present invention, wherein the actuating element (20) refers to a pneumatic cylinder, a hydraulic cylinder, an electromagnet, a stepping motor or a servo motor, and the present invention is not limited.

The automatic feed stroke adjusting device of the sewing machine disclosed in the present invention may include a limit switch [not shown], and is disposed on a fixed object (such as a casing of the sewing machine), and is located at the actuating lever (21), a movement path of the dial (60), the second link (50) or the dial (70), such that the actuating lever (121), the dial (60), the second link (50) or the dial (70) During the displacement process, when the limit switch (80) is touched or triggered, the actuating lever (21) stops displacement immediately to stably position the guide block (121) of the linkage rod (12) and the shake The distance of the swing center (130) of the arm (13). The above limit switch can be a mechanical switch or an optical sensing element, and the present invention is not self-limiting.

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

(11)‧‧‧Feed gear connecting rod
(110)‧‧‧ pivotal center
(12)‧‧‧ linkage rod
(121)‧‧‧Guide blocks
(13) ‧‧‧ rocker arm
(130)‧‧‧Swing Center
(131)‧‧‧ linkage slot
(20) ‧‧‧ actuation elements
(21)‧‧‧Action rod
(30)‧‧‧ Sensors
(40)‧‧‧First connecting rod
(41) ‧‧‧ first end
(42) ‧‧‧ second end
(421)‧‧‧ Guide shaft
(50)‧‧‧Second link
(51) ‧ ‧ first end
(52) ‧‧‧ second end
(521) ‧‧‧Promoting sales
(60) ‧‧ ‧ buttons
(61)‧‧‧ universal joint
(70)‧‧‧
(71) ‧ ‧ first end
(711)‧‧‧Chute
(72) ‧‧‧ second end
(721)‧‧‧Long slot
(80) ‧‧ ‧ shaft
(T) ‧‧‧ delivery teeth
(N)‧‧‧ stitches
(S) ‧‧‧ initial paragraph
(E) ‧ ‧ final paragraph
(D2) (D3) ‧‧‧needle spacing

The first picture shows the schematic diagram of the conventional sewing space; the second picture shows the three-dimensional exploded structure of the present invention; the third picture shows the second picture after the assembly is completed; the fourth picture shows the present The three-dimensional schematic diagram of the new device in the sewing machine casing; The fifth figure: is a schematic diagram of the plane structure of the new type; The sixth figure: shows the operation diagram of reducing the sewing space before the work piece is about to enter the sewing seam; The sixth figure restores the schematic diagram of the original set sewing pitch; the eighth figure: shows the operation diagram of reducing the sewing pitch before the work is about to leave the sewing seam; and the ninth figure shows the schematic diagram of the new sewing pitch.

(11)‧‧‧Feed gear connecting rod

(110)‧‧‧ pivotal center

(12)‧‧‧ linkage rod

(121)‧‧‧Guide blocks

(13) ‧‧‧ rocker arm

(130)‧‧‧Swing Center

(131)‧‧‧ linkage slot

(20) ‧‧‧ actuation elements

(21)‧‧‧Action rod

(40)‧‧‧First connecting rod

(41) ‧‧‧ first end

(42) ‧‧‧ second end

(421)‧‧‧ Guide shaft

(50)‧‧‧Second link

(51) ‧ ‧ first end

(52) ‧‧‧ second end

(521) ‧‧‧Promoting sales

(60) ‧‧ ‧ buttons

(61)‧‧‧ universal joint

(70)‧‧‧

(71) ‧ ‧ first end

(711)‧‧‧Chute

(72) ‧‧‧ second end

(721)‧‧‧Long slot

(80) ‧‧ ‧ shaft

(T) ‧‧‧ delivery teeth

Claims (8)

The utility model relates to a feeding tooth automatic stroke adjusting device of a sewing machine, wherein the feeding tooth is fixed on a feeding tooth connecting rod, the middle portion of the feeding tooth connecting rod is pivotally connected with a linkage rod, and the linkage rod is pivotally connected with a guiding block The guide block is disposed in the linkage groove of the rocker arm, wherein the feed tooth automatic stroke adjustment device further comprises: an actuating member, comprising an actuating rod, wherein the actuating rod is used for interlocking the linkage rod displacement And a sensor for triggering a signal to drive the actuating member of the actuating member to extend or pull back. The automatic feed adjustment device of the sewing machine of claim 1 further comprising: a first link, the first end of the first link being connected to the linkage rod, and the second end of the first link a second link, the first end of which is coupled with a button, so that the second link rotates in conjunction with the button, and the second end of the second link protrudes and pushes And a dialing plate, the middle portion of the dialing plate is pivotally mounted on a rotating shaft, and the first end of the dialing plate is recessed with a sliding slot for sliding the guiding shaft, and the second end of the dialing plate A long slot is provided for wearing the push pin. The automatic feed stroke adjusting device of the sewing machine according to claim 2, wherein the dial is coupled to the actuating lever of the actuating member. The feed dog automatic stroke adjusting device of the sewing machine according to claim 3, wherein the actuating member of the actuating member and the dial plate are connected by a universal joint. The automatic tooth stroke adjustment device of the sewing machine according to claim 1, wherein the sensor senses that the workpiece approaches the needle of the sewing machine, triggers a signal, and drives the actuation rod of the actuation member to displace the linkage rod. The guide block approaches the center of oscillation of the rocker arm. The automatic tooth stroke adjustment device of the sewing machine according to claim 1, wherein the sensor senses that the work object leaves the sewing machine needle, triggers a signal, drives the actuation rod displacement of the actuation element, and guides the linkage rod. The block approaches the center of the swing of the rocker arm. The automatic feed stroke adjusting device of the sewing machine according to claim 1, wherein the actuating member is a pneumatic cylinder, a hydraulic cylinder, an electromagnet, a stepping motor or a servo motor. The automatic feed stroke adjusting device of the sewing machine of claim 2, wherein the first end of the first link is integrally connected to the linkage rod.