TWM565213U - Automatic bottom line change device for sewing machine - Google Patents

Abstract

The utility model discloses a bottom line automatic changing device for a sewing machine, which is used for automatically replacing a new bobbin and an empty bobbin with a sewing machine, comprising: a bobbin disk, an arm, a gripper and an arm driving mechanism; wherein the shuttle The heart plate is used to supply a new bobbin with a full load of the bottom thread, and as a place for the empty bobbin (the bobbin that has run out of the bobbin thread); the gripper is slidably fitted to the arm, and the arm drive mechanism has a reciprocating rotation The moving second driver is used to drive the arm to swing between the first position and the second position, and the gripper simultaneously moves closer to the bobbin of the sewing machine for new bobbin and empty when the arm swings to the first position. The change of the bobbin, when the arm swings to the second position, the gripper can be close to the bobbin for replacing the new bobbin and the empty bobbin; the novel has the advantages of quickness, simple action and easy control.

Description

Sewing machine bottom line automatic change device

The invention relates to an auxiliary device for an industrial sewing machine, in particular to a bottom line automatic changing device for a sewing machine.

The Lock Sewing Machine is an industrial sewing machine widely used in automated production lines. It can perform a large number of continuous sewing operations on sewing materials, such as continuous seaming of sewing materials or automated production of Flexible Freight Bags. Used to form a lock stitch in the sewing. The general lock stitch is formed by interlacing the bottom thread and the upper thread through the hook mechanism of the lock sewing machine. The upper thread can be continuously supplied by an external supply device, and the bottom thread is wound around the bobbin of the rotary sewing machine (or shuttle) of the lock sewing machine, and the length of the bobbin thread that can be wound each time is limited, and the bottom thread is used for the bottom thread. After the end, you must replace the new bobbin with the bottom line. It is known that most lock-type sewing machines need to be shut down after working for a period of time. By manually replacing the bobbin, the empty bobbin thread that has run out of the bobbin thread is taken out from the lock-type sewing machine, and then replaced with a new bobbin with a full-loaded bobbin thread. . This manual replacement of the bottom line will greatly affect the capacity and speed. Therefore, it is necessary to develop a device that can automatically change the bottom line to solve the above problem.

In the approved Taiwan New Patent Certificate No. M552507, an "automatic change bobbin device" is proposed to be assembled in a sewing machine having a rotary hook, which is mainly composed of a replenishing mechanism and a replacement mechanism, and the replenishing mechanism has a bobbin case which can be used for replacement. The changing mechanism has a movable frame that is swingable or displaceable and two jaw assemblies, wherein one of the jaws is when the moving frame changes position The assembly can move the replacement bobbin case from a replenishing position assembled in the replenishing mechanism to an operating position assembled in the bobbin, while the other jaw assembly moves the bobbin case depleting the bobbin thread from the operating position to a position away from the replenishment The exit position of the position, whereby the bobbin case for exhausting the bottom line moves to the collecting groove, and the replacement bobbin case can be moved toward the hook at the same time, thereby shortening the working time for replacing the bobbin case. The above patented technology can quickly replenish and replace the bobbin case by using two jaw assemblies, but the structure and the operation are complicated, requiring high manufacturing cost and high control difficulty.

In the approved Chinese Utility Model Patent Authorization No. CN20655373U, a manipulator for an industrial sewing machine bottom wire replacement device is disclosed, including a cylinder, a chuck, a lever, a support block and a bobbin claw, and the lever passes through the output of the top block and the cylinder. The shaft is connected, the bobbin claw is connected with the lever through the lever shaft, the spring is sleeved on the lever shaft, and the side of the lever shaft is connected with the support block, and the support is fast connected with the chuck.

The technical problem to be solved by the present invention is to provide a bottom line automatic changing device for a sewing machine for automatically replacing a new bobbin and an empty bobbin in the bobbin holder of the sewing machine.

In order to solve the above technical problem, an embodiment of the automatic thread changing device of the sewing machine of the present invention comprises: a bobbin disk for carrying at least two bobbins, the bobbin disk being rotated by a motor, and the bobbin disk is used for Moving at least one of the bobbins to a pick-and-place position; an arm can swing between a first position and a second position with a rotating shaft as a center of rotation, and the arm is fixedly fitted with a sliding rod, and the axial ends of the sliding rod The first end and the second end, respectively, wherein the first end is close to the rotating shaft, and the second end is close to the bobbin of the sewing machine when the arm swings to the first position The second end of the seat is close to the bobbin disk when the arm is swung to the second position; a gripper comprising: a first driver, a claw seat, a movable claw hook and a fixed claw; the claw seat slidably The slider is assembled on the arm, and the claw seat can reciprocate between the first end and the second end of the slide rod along the axial direction of the slide rod; the movable claw hook is rotatably pivoted to a pivotal connection of the claw seat The first drive is a drive that can provide a reciprocating linear motion, and the first drive is configured to drive the movable claw hook to swing back and forth between the grasping position and a release position with the pivot shaft as a center of rotation, in the grasping position. The movable claw hook can clamp the bobbin in cooperation with the fixed claw, and the movable claw hook in the release position can release the bobbin; and an arm driving mechanism including a second driver and a connecting rod, the second driver having a driving shaft, The second actuator is a driver capable of generating a reciprocating rotational motion, one end of the connecting rod is fixed to the driving shaft of the second driver, and the other end of the connecting rod is rotatably connected to the claw seat of the gripper, and the second driver is driven by the connecting rod Arm The first position and the second position oscillate, and when the arm swings to the first position, the claw seat is simultaneously slid to the second end of the sliding rod, and when the arm swings to the second position, the claw seat is simultaneously slid to the sliding rod. Two ends.

As a preferred structure of the automatic thread changing device of the sewing machine of the present invention, the motor that drives the bobbin disk to rotate is a servo motor or a stepping motor.

As a preferred structure of the automatic thread changing device of the sewing machine of the present invention, the slide bar is two parallel slide bars.

A preferred structure of the automatic thread changing device for the sewing machine of the present invention, wherein the first actuator is a push-pull electromagnet.

A preferred structure of the automatic thread changing device for the sewing machine of the present invention, wherein the second actuator is a servo motor or a stepping motor.

The utility model has the advantages and advantages of the automatic bottom line automatic changing device of the sewing machine, that can quickly and automatically replace the new bobbin and the empty bobbin in the bobbin holder of the sewing machine, and the action of the bottom line automatic changing device of the novel sewing machine only includes reciprocating Rotary motion and reciprocating linear motion have the advantages of fast, simple movement and easy control.

A‧‧‧ tag

S‧‧・索心

10‧‧‧ spindle

11‧‧‧Hosting

12‧‧‧Servo motor

13‧‧‧Belt transmission mechanism

20‧‧‧ Arm

21‧‧‧ shaft

22‧‧‧ Slider

30‧‧‧ Grabber

31‧‧‧First drive

311‧‧‧Put

32‧‧‧ claw seat

33‧‧‧ Activity claw hook

331‧‧‧ pivot shaft

34‧‧‧Fixed claws

35‧‧‧ rocker arm

40‧‧‧arm drive mechanism

41‧‧‧Second drive

411‧‧‧ drive shaft

42‧‧‧ Connecting rod

421‧‧‧ Connecting rod

90‧‧‧ Boss

Fig. 1 is a perspective view showing the construction of an embodiment of the automatic thread changing device for the sewing machine of the present invention.

Fig. 2 is a partial structural view showing an embodiment of Fig. 1.

Fig. 3-1 is a front perspective structural view of the embodiment of Fig. 2.

Figure 3-2 is a left side view of Figure 3-1.

Figure 3-3 is a right side view of Figure 3-1.

Figure 3-4 is a plan view of Figure 3-1.

Figure 3-5 is a bottom view of Figure 3-1.

Fig. 4 is a schematic view showing the operation of the automatic thread changing device of the sewing machine of the present invention, showing the case where the movable claw hook in the grasping position cooperates with the fixed claw to clamp the bobbin.

Fig. 5 is a front perspective structural view of Fig. 4.

Fig. 6 is a schematic view showing the operation of the automatic thread changing device of the sewing machine of the present invention, showing the case where the movable claw hook is in the release position.

Fig. 7 is a bottom view structural view of Fig. 5.

Fig. 8 is a schematic view showing the operation of the automatic thread changing device of the sewing machine of the present invention, showing the case where the arm is swung to the first position.

The positional relationship described in the following embodiments includes upper, lower, left and right, and unless otherwise specified, is based on the direction indicated by the components in the drawing.

First, please refer to Fig. 1 which is a structural view showing an embodiment of an automatic thread changing device for a sewing machine of the present invention.

An embodiment of the automatic thread changing device of the sewing machine of the present invention comprises: a bobbin 10, an arm 20, a gripper 30 and an arm driving mechanism 40.

The main function of the bobbin disk 10 is to supply a new bobbin with a full load bottom line, and a placement place as an empty bobbin (a bobbin having used the bottom thread), and the bobbin disk 10 has at least two for carrying the shuttle. The carrier S of the heart S (see FIG. 7), the embodiment shown in FIG. 1 has four carriers 11 but not limited thereto. In one embodiment of the present invention, the carrier 11 is basically a column. The centering position of the bobbin S has a through hole just enough to fit over the columnar member and can freely perform the picking/putting operation; the bobbin disk 10 can be rotated, one embodiment of which is through a servo motor 12 (or The stepping motor) and the belt drive mechanism 13 (see FIG. 5) drive the bobbin disk 10 to rotate; the bobbin disk 10 is used to move at least one carrier 11 to a pick-and-place position for the gripper 30 to grasp The new bobbin S on the carrier 11 and the gripper 30 place the empty bobbin S on the carrier 11.

Please refer to FIG. 2, FIG. 3-1 to FIG. 3-5; the arm 20 can be rotated at a first position (see FIG. 8) and a second position (see FIG. 5) with a rotating shaft 21 as a center of rotation. Between the swings, the arm 20 is fixedly fitted with a slide bar 22, preferably two parallel slide bars 22, and the axial ends of the slide bar 22 are respectively a first end and a second end, wherein the first end is close to the rotating shaft 21 When the arm 20 is swung to the first position, the second end approaches the bobbin holder 90 of the sewing machine (see Fig. 8), and the second end approaches the bobbin disk 10 when the arm 20 is swung to the second position (see Fig. 5).

The gripper 30 is configured to perform the action of grasping and releasing the bobbin at two positions of the bobbin disk 10 and the bobbin holder 90 of the sewing machine, specifically including four actions, respectively: (1) in the bobbin holder 90 Grab the empty bobbin S that has run out of the bobbin thread, (2) place the empty bobbin S on the empty carrier 11 above the bobbin disk 10, and (3) grasp the new shuttle from the bobbin disc 10 with the bottom line loaded The heart S, and (4) the new bobbin S is inserted into the empty bobbin holder 90; wherein the gripper 30 includes: a first driver 31, a claw seat 32, a movable claw hook 33 and a fixing claw 34; the claw seat 32 can The slide bar 22 slidably fitted to the arm 20 is reciprocally movable between the first end and the second end of the slide bar 22 along the axial direction of the slide bar 22; the movable claw hook 33 is rotatably pivoted to the pawl seat 32. The pivoting shaft 331 (see FIG. 3-1), the first driver 31 is a driver that can provide reciprocating linear motion, and the first driver 31 is preferably a push-pull electromagnet, and the first driver 31 is used to drive the activity. The claw hook 33 reciprocates between the grasping position and the release position with the pivot shaft 331 as a center of rotation. One embodiment is to fix a rocker arm 35 at the rear end of the pivot shaft 331 (see the third -3 and 6), the pivot shaft is connected to a torsion spring (not shown), which normally rotates the pivot shaft by the torsion of the torsion spring and maintains the movable hook 33 in the release position (see Figure 6). When the bobbin S needs to be grasped, the push rod 311 of the first driver 31 pushes the rocker arm 35, thereby driving the pivot shaft to rotate and rotating the movable claw hook 33 to the gripping position (see the dotted line in FIG. 2) By). Wherein the fixing claws 34 are used to grasp the bobbin S in cooperation with the movable claw hooks 33 in the grasping position, in particular, the movable claw hooks 33 in the grasping position can cooperate with the fixing claws 34 to clamp the bobbin S, and the movement in the release position The claw hook 33 can release the bobbin S, in other words, the movable claw hook 33 in the release position does not clamp the bobbin S with the fixing claw 34. Referring to FIGS. 4 and 5, when grasping the bobbin S, the claw is fixed. 34 abuts against the surface of the bobbin S, the movable claw hook 33 can hook the tag A of the bobbin S.

The arm drive mechanism 40 includes a second driver 41 and a link 42, the second driver 41 has a drive shaft (see Figures 3-3), and the second driver 41 is a reciprocating rotary motion One embodiment of the second driver 41 is a servo motor or a stepping motor. One end of the link 42 is fixed to the drive shaft 411 of the second driver 41, and the other end of the link 42 is connected by a connecting rod 421 (see the second The claw seat 32 rotatably coupled to the gripper 30 swings the arm 20 between the first position and the second position by the second driver 41 and the link 42 while achieving the bobbin disk 10 and the bobbin holder. The gripper 30 is moved between 90; specifically, the second driver 41 swings the arm 20 between the first position and the second position through the link 42 to simultaneously drive the pawl 32 when the arm 20 swings to the first position. Sliding to the second end of the slide bar 22 simultaneously drives the pawl seat 32 to slide to the second end of the slide bar 22 when the arm 20 is swung to the second position.

The present invention integrates the reciprocating rotational movement of the second actuator 41 and the oscillating motion of the arm 20 by the claw seat 32 which can reciprocately slide on the slide bar 22, and can simultaneously move the gripper 30 to be close to the bobbin disk 10. And the operation close to the bobbin holder 90 has the advantages of quickness, simple action and easy control.

Although the present invention has been disclosed above by the above embodiments, it is not intended to limit the present invention, and those skilled in the art can make some modifications and retouchings without departing from the spirit and scope of the present invention. The scope of patent protection is subject to the definition of the claims of the present application.

Claims (5)

A bottom line automatic changing device for a sewing machine for automatically replacing a new bobbin and an empty bobbin in a bobbin holder of the sewing machine, comprising: a bobbin for carrying at least two bobbins, the bobbin disk being a motor is driven to rotate, the bobbin disk is used to move at least one of the bobbin to a pick-and-place position; an arm can swing between a first position and a second position with a rotating shaft as a center of rotation, the arm is fixed A sliding rod is assembled, the axial ends of the sliding rod are respectively a first end and a second end, wherein the first end is adjacent to the rotating shaft, and the second end is close to the bobbin of the sewing machine when the arm swings to the first position a second end of the arm that is close to the bobbin disk when the arm is swung to the second position; a gripper comprising: a first driver, a claw seat, a movable claw hook and a fixed claw; the claw seat is slidable Mounted on the slider of the arm, the pawl can reciprocate between the first end and the second end of the slide along the axial direction of the slide; the movable claw is rotatably pivoted on the a pivoting shaft of the claw seat, the first driver is a kind that can be provided a linear motion driver, the first driver is configured to drive the movable claw hook to swing back and forth between the grasping position and a release position with the pivot shaft as a center of rotation, and the movable claw hook at the grasping position can be Cooperating with the fixed claw to clamp the bobbin, the movable claw hook in the release position can release the bobbin; and an arm driving mechanism including a second driver and a connecting rod, the second driver having a driving shaft The second driver is a driver capable of generating a reciprocating rotational movement, one end of the link being fixed to the drive shaft of the second driver, and the other end of the link being rotatably coupled to the pawl of the gripper. The second driver drives the arm to swing between the first position and the second position by the connecting rod, and simultaneously slides the claw seat to the second end of the sliding bar when the arm swings to the first position , swinging the arm to the second When the position is at the same time, the claw seat is simultaneously slid to the second end of the slide bar. The bottom thread automatic changing device of the sewing machine according to claim 1, wherein the slide bar is two parallel slide bars. The bottom thread automatic changing device of the sewing machine according to claim 1, wherein the first actuator is a push-pull electromagnet. The bottom thread automatic changing device of the sewing machine according to claim 1, wherein the second driver is a servo motor or a stepping motor. The bottom line automatic changing device of the sewing machine according to claim 1, wherein the motor that drives the bobbin disk to rotate is a servo motor or a stepping motor.