CN112981749A

CN112981749A - Shuttle changing device and sewing machine

Info

Publication number: CN112981749A
Application number: CN201911271639.2A
Authority: CN
Inventors: 余连泰; 陈勇军; 黄林; 周道洪; 钟大亮
Original assignee: Guangdong Tianji Industrial Intelligent System Co Ltd
Current assignee: Guangdong Tianji Industrial Intelligent System Co Ltd
Priority date: 2019-12-12
Filing date: 2019-12-12
Publication date: 2021-06-18

Abstract

The invention relates to a shuttle changing device and a sewing machine. A shuttle changing device comprises a material taking mechanism and a material loading mechanism, wherein the material loading mechanism is provided with a plurality of stations for loading shuttle shells, the material taking mechanism grabs the old shuttle shells and places the old shuttle shells on the empty stations of the material loading mechanism, and the material taking mechanism grabs new shuttle shells from the material loading mechanism; the material taking mechanism comprises a support plate, a fixed clamping finger, a movable clamping finger and a driving assembly, wherein the fixed clamping finger is fixedly connected to the support plate, the movable clamping finger is rotatably connected to the support plate, the driving assembly comprises a driving piece and an elastic piece, the driving piece can be close to and abut against or be far away from the movable clamping finger, the elastic piece is connected with the support plate and the movable clamping finger, when the driving piece abuts against the movable clamping finger, the movable clamping finger moves towards the fixed clamping finger to clamp the bobbin case, and when the driving piece is far away from the movable clamping finger, the elastic piece drives the movable clamping finger to move reversely to loosen the bobbin case. A sewing machine comprises the shuttle changing device and a sewing machine main body.

Description

Shuttle changing device and sewing machine

Technical Field

The invention relates to the technical field of sewing processing, in particular to a shuttle changing device and a sewing machine.

Background

The fabric tape needs to be sewn by a sewing machine after the preliminary joining process, and the sewing machine sews the fabric tape by the winding on the bobbin thereof, so that the bobbin needs to be replaced by the sewing machine in the sewing process to maintain the continuous sewing work. The bobbin replacing process of the existing sewing machine is generally completed manually or semi-automatically and semi-manually, so that the working efficiency is low, the manual operation is easy to make mistakes, the product percent of pass is reduced, and the quality of the fabric belt is difficult to ensure.

Disclosure of Invention

In view of the above, it is desirable to provide a shuttle changing device and a sewing machine.

A shuttle changing device comprises a material taking mechanism and a material loading mechanism, wherein the material loading mechanism is provided with a plurality of stations for loading bobbin cases, the material taking mechanism grabs the old bobbin cases and places the old bobbin cases on the empty stations of the material loading mechanism, and the material taking mechanism grabs the new bobbin cases from the material loading mechanism;

the material taking mechanism comprises a support plate, a fixed clamping finger, a movable clamping finger and a driving assembly, the fixed clamping finger is fixedly connected to the support plate, the movable clamping finger is rotatably connected to the support plate, the driving assembly comprises a driving piece and an elastic piece, the driving piece can be close to and abut against or be far away from the movable clamping finger, the elastic piece is connected with the support plate and the movable clamping finger, when the driving piece abuts against the movable clamping finger, the movable clamping finger moves towards the fixed clamping finger to clamp the bobbin case, and when the driving piece is far away from the movable clamping finger, the elastic piece drives the movable clamping finger to move reversely to loosen the bobbin case.

In one embodiment, the movable gripper finger includes a curved portion curved toward the direction of the fixed gripper finger and having a tip end, and a driving portion capable of being pushed by the driving member to enable the tip end of the movable gripper finger to be inserted into the groove of the bobbin case.

In one embodiment, the fixed clamping finger comprises two clamping blocks arranged at intervals, and an inclined piece of the bobbin case is accommodated between the two clamping blocks.

In one embodiment, the fixed gripper fingers comprise a limit ramp arranged between the two grippers to abut against the inclined tab of the bobbin case.

In one embodiment, the loading mechanism comprises a loading frame and a turntable which is rotatably connected to the loading frame, and a plurality of stations for loading the bobbin case are arranged on the periphery of the turntable at intervals.

In one embodiment, the loading mechanism further comprises a driving disc, and the rotating disc is detachably connected to the driving disc.

In one embodiment, a plurality of stations are arranged on the rotating disc, and each station is correspondingly provided with a middle positioning piece inserted into the middle hole of the bobbin case and an outer positioning piece attached to the periphery of the bobbin case.

In one embodiment, the outer positioning piece is provided with a limiting groove for clamping the outer convex part of the shuttle shell.

In one embodiment, the material taking mechanism further comprises a first guide driving unit and a second guide driving unit, the second guide driving unit is arranged on the first guide driving unit, the first guide driving unit drives the second guide driving unit to move along a first direction, the support plate is arranged on the second guide driving unit, the second guide driving unit drives the support plate to move along a second direction, and therefore the fixed clamping fingers and the movable clamping fingers of the material taking mechanism can be close to the material loading mechanism to take materials.

A sewing machine comprises the shuttle changing device and a sewing machine main body, wherein an old bobbin case on the sewing machine main body is detached and moved to an empty station of the material loading mechanism by the material taking mechanism, and a new bobbin case on the material loading mechanism is moved to the sewing machine main body by the material taking mechanism. The working strength of the sewing machine for replacing the shuttle peg is reduced, the working efficiency of the sewing machine is improved, and the quality of a processed product of the sewing machine is ensured.

Has the advantages that: the shuttle changing device is characterized in that the material taking mechanism is matched with the material loading mechanism, the material taking mechanism grabs an old bobbin case and places the old bobbin case on an empty station of the material loading mechanism, and the material taking mechanism grabs a new bobbin case from the material loading mechanism, so that the bobbin case is automatically changed. The movable clamping fingers of the shuttle changing device are rotatably connected to the support plate, the movable clamping fingers are close to or far away from the fixed clamping fingers through the cooperation of the driving piece and the elastic piece, so that the bobbin case can be grabbed, the driving piece is used for realizing that the movable clamping fingers are far away from the fixed clamping fingers through the cooperation of the driving piece and the elastic piece, and the elastic piece is used for enabling the movable clamping fingers to return and keep away from the fixed clamping fingers when the driving piece is separated from the movable clamping fingers, so that the bobbin case can be grabbed more firmly and agilely, and the shuttle changing device is strong in stability.

The sewing machine comprises a shuttle changing device, and can realize automatic shuttle changing.

Drawings

FIG. 1 is a perspective view of a sewing machine in one embodiment of the present application;

FIG. 2 is a schematic view of a shuttle changing device in the sewing machine shown in FIG. 1;

FIG. 3 is a schematic view of a portion of a material extracting mechanism included in the shuttle changing device according to an embodiment of the present application;

FIG. 4 is a schematic view of the take-off mechanism of FIG. 3, with FIG. 4 further showing the construction of the bobbin case;

FIG. 5 is a perspective view of the structure of FIG. 4 from another perspective;

FIG. 6 is an exploded view of a loading mechanism included in a shuttle changing device according to an embodiment of the present application;

FIG. 7 is a schematic view of a loading mechanism with a bobbin case attached according to one embodiment of the present application;

fig. 8 is a schematic diagram of the engagement of a movable gripper finger with a bobbin case in one embodiment of the present application.

Reference numerals: 10. a sewing machine main body; 11. a shuttle changing device; 100. a material taking mechanism; 110. a mounting plate; 120. fixing the clamping fingers; 121. a clamping block; 122. a limiting inclined plane; 123. a bump; 130. a movable clamping finger; 130A, a bending part; 130B, a driving part; 130C, a tip; 131. a rotating shaft; 140. a drive assembly; 141. a drive member; 142. an elastic member; 150. a first guide driving unit; 160. a second guide driving unit; 200. a material loading mechanism; 210. a material loading frame; 220. a turntable; 221. positioning holes; 222. a through hole; 223. sinking a groove; 224. a middle positioning piece; 225. an outer positioning member; 226. a limiting groove; 230. a drive motor; 240. an inductor; 250. a drive disc; 251. positioning pins; 260. a quick release spring knob; 300. a bobbin case; 310. a groove; 320. a step groove; 330. an inclined plate; 340. an outer convex portion; 350. a median hole.

Detailed Description

To facilitate an understanding of the invention, the invention is described more fully below with reference to the accompanying drawings. Preferred embodiments of the present invention are shown in the drawings. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. In contrast, when an element is referred to as being "directly on" another element, there are no intervening elements present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only.

Fig. 1 is a perspective view of a sewing machine according to an embodiment of the present application, and as shown in fig. 1, the sewing machine includes a sewing machine main body 10 and a shuttle changing device 11 provided on the sewing machine main body 10.

Fig. 2 is a schematic structural view of the shuttle changing device 11 in the sewing machine shown in fig. 1. The shuttle changing device 11 comprises a material taking mechanism 100 and a material loading mechanism 200, wherein a plurality of stations for loading the bobbin case 300 are arranged on the material loading mechanism 200, the material taking mechanism 100 takes out the old bobbin case 300 from the sewing machine body 10 and places the old bobbin case 300 on an empty station on the material loading mechanism 200, then the material taking mechanism 100 takes out a new bobbin case 300 from the material loading mechanism 200 and installs the new bobbin case 300 on the sewing machine body 10, and therefore automatic shuttle changing is achieved.

Fig. 3 is a schematic diagram of a portion of the material extracting mechanism 100 according to an embodiment, in which the material extracting mechanism 100 holds a bobbin case 300. The material taking mechanism 100 comprises a support plate 110, a fixed clamping finger 120, a movable clamping finger 130 and a driving assembly 140, wherein the fixed clamping finger 120 is fixedly connected to the support plate 110, the movable clamping finger 130 is rotatably connected to the support plate 110, and the driving assembly 140 is fixedly connected to the support plate 110. In the embodiment shown in fig. 3, the movable finger 130 is rotatably connected to the support plate 110 via a rotating shaft 131, the driving assembly 140 includes a driving member 141 and an elastic member 142, the driving member 141 can be a cylinder, the elastic member 142 can be a torsion spring, and an output shaft of the driving member 141 extends out and abuts against the movable finger 130 to rotate the movable finger 130 around the rotating shaft 131, so that the movable finger 130 moves toward or away from the fixed finger 120. When the movable gripper finger 130 moves toward the fixed gripper finger 120, the movable gripper finger 130 and the fixed gripper finger 120 grip the bobbin case 300 together; the elastic member 142 connects the bracket plate 110 and the movable finger 130, and when the output shaft of the driving member 141 is retracted, the elastic member 142 drives the movable finger 130 to rotate reversely about the rotating shaft 131 to return the movable finger 130, thereby allowing the movable finger 130 and the fixed finger 120 to release the bobbin case 300. In some embodiments, the movable clamping finger 130 can also be slidably connected to the frame plate 110, i.e., the driving assembly 140 is used to drive the movable clamping finger 130 to slide relative to the frame plate 110, so as to move the movable clamping finger 130 to approach or move away from the fixed clamping finger 120.

Fig. 4 is a schematic view of the take-off mechanism 100 shown in fig. 3, and fig. 4 also shows the construction of the bobbin case 300; fig. 5 is a perspective view of the structure of fig. 4 from another perspective. The bobbin case 300 is provided with a groove 310 and a step groove 320 which are oppositely arranged, and an inclined plate 330 is arranged between the groove 310 and the step groove 320.

In one embodiment, as shown in fig. 4 and 5, the movable finger 130 of the material taking mechanism 100 includes a bending portion 130A and a driving portion 130B, the bending portion 130A is bent toward the fixed finger 120, the bending portion 130A has a tip 130C, the movable finger 130 is rotatably connected to the support plate 110 by a rotating shaft 131, and the bending portion 130A and the driving portion 130B respectively extend toward both sides with respect to the rotating shaft 131, when the driving portion 130B is pushed and extended by the driving member 141, the bending portion 130A is rotated toward the fixed finger 120, and the tip 130C of the bending portion 130A can be inserted into the groove 310; further, the fixing clip finger 120 includes a protrusion 123, and the protrusion 123 can extend into the stepped groove 320. Specifically, the protrusion 123 of the fixed clamping finger 120 is inserted into the stepped groove 320 to perform a limiting function; when the movable clamping finger 130 rotates, the tip 130C of the bending portion 130A can be inserted into the groove 310 of the bobbin case 300, and after the tip 130C of the bending portion 130A is inserted into the groove 310 of the bobbin case 300, the tip 130C not only can press the bobbin case 300 toward the direction of the protrusion 123, but also can prevent the bobbin case 300 from moving in other directions after being inserted into the groove 310, thereby improving the stability of clamping the bobbin case 300.

As shown in fig. 8, fig. 8 is a schematic view of the movable gripper finger 130 engaged with the bobbin case 300. After the movable clamp finger 130 is rotated about the rotating shaft 131 and inserted into the groove 310 of the bobbin case 300, the pointed end 130C not only can press the bobbin case 300 toward the direction of the protrusion 123, but also can prevent the bobbin case 300 from moving in other directions by the pointed end 130C being inserted into the groove 310, thereby improving the stability of clamping the bobbin case 300.

In one embodiment, as shown in fig. 4 and 5, the fixed clamping finger 120 includes two clamping blocks 121 arranged at intervals, and the inclined piece 330 of the bobbin case 300 can be just accommodated between the two clamping blocks 121, so as to further limit the bobbin case 300 and improve the clamping stability.

In one embodiment, as shown in fig. 4 and 5, the fixed clamping finger 120 is further provided with a limiting inclined surface 122 between the two clamping blocks 121, when the inclined piece 330 is accommodated between the two clamping blocks 121, the inclined piece 330 can abut against the limiting inclined surface 122 to further limit the bobbin case 300, and the stability of clamping the bobbin case 300 is improved.

In one embodiment, as shown in fig. 2, the loading mechanism 200 includes a loading rack 210 and a turntable 220 rotatably coupled to the loading rack 210. A plurality of stations for loading the bobbin case 300 are provided at intervals around the outer circumference of the turntable 220. The loading mechanism 200 further includes a driving motor 230 for driving the turntable 220 to rotate to drive the station to move. During operation, the material taking mechanism 100 moves towards the turntable 220 of the material loading mechanism 200 and can move to a certain fixed position, and the turntable 220 can move the stations on the turntable 220 to the fixed positions respectively, so that the material taking mechanism 100 can place the bobbin case 300 to the empty station on the turntable 220 or take the bobbin case 300 away from the station. For example, the carousel 220 is oriented in a vertical direction such that stations on the carousel 220 move in a vertical plane. In one embodiment, each station on the turntable 220 can be moved to the highest point, which is the position for taking and placing material. Because the material taking mechanism 100 is located at the position corresponding to the highest point when the bobbin case 300 is taken and placed each time, the material taking mechanism 100 can take and place materials quickly and accurately. Further, the material loading rack 210 is further provided with a sensor 240, and the sensor 240 can sense whether the bobbin case 300 moves to the highest point or not, so that accurate material taking and placing can be realized.

FIG. 6 is an exploded view of the loading mechanism 200 in one embodiment; fig. 7 is a schematic view of the loading mechanism 200 with the bobbin case 300 attached.

In one embodiment, as shown in fig. 6, the loading mechanism 200 further includes a driving disc 250, the driving disc 250 is rotatably connected to the loading frame 210, and the driving motor 230 drives the driving disc 250 to rotate through a belt or a gear. The rotary table 220 is detachably mounted on the driving disc 250, so that the rotary table 220 can be quickly detached from the driving disc 250, the bobbin case 300 on the rotary table 220 can be integrally detached from the driving disc 250, the bobbin case 300 can be conveniently and integrally replaced, and the working efficiency is improved.

In one embodiment, as shown in fig. 6, a plurality of positioning pins 251 are disposed on the driving disc 250, positioning holes 221 matched with the positioning pins 251 are disposed on the rotating disc 220, and the rotating disc 220 is accurately mounted on the driving disc 250 by matching the positioning pins 251 with the positioning holes 221.

In one embodiment, as shown in FIG. 6, the dial 220 is coupled to the drive plate 250 by a quick release spring knob 260. For example, the quick release spring knob 260 includes an elongated locking cap rotatably mounted on the driving disk 250, and a spring is disposed between the locking cap and the driving disk 250, and after the locking cap is pulled outward, the spring is stretched, and the spring can pull the locking cap toward the driving disk 250. The turntable 220 is provided with a through hole 222 and a sink 223 which are arranged crosswise. After the locking cap is passed through the through hole 222, the locking cap is rotated so that the locking cap corresponds to the depressed groove 223, and the locking cap is pulled toward the driving disk 250 by the spring so as to enter the depressed groove 223. Thus, quick detachment and installation of the driving disc 250 and the turntable 220 are achieved.

In one embodiment, the turntable 220 is a magnetic turntable 220, or the turntable 220 is provided with a magnetic member. The bobbin case 300 may be made of an iron material so that the bobbin case 300 can be quickly attached to the turntable 220. The bobbin case 300 may be provided with another magnetic member to be attracted to the magnetic member of the turntable 220.

As shown in fig. 6, a plurality of stations for loading the bobbin case 300 are provided at intervals on the outer circumference of the rotary table 220, and each station is provided with a middle positioning member 224 and an outer positioning member 225. Referring to fig. 7, the middle positioning member 224 is adapted to be inserted into the middle hole 350 of the bobbin case 300, and the outer positioning member 225 is adapted to abut against the outer circumference of the bobbin case 300, thereby positioning the bobbin case 300. As shown in fig. 6, the outer positioning member 225 is further provided with a limiting groove 226, as shown in fig. 7, the limiting groove 226 is used for clamping the outer protrusion 340 of the bobbin case 300 to prevent the bobbin case 300 from rotating relative to the turntable 220, and further the bobbin case 300 is fixed on the turntable 220 and can not move relative to the turntable 220 and can not rotate relative to the turntable 220, so that the material taking accuracy of the material taking mechanism 100 is improved.

As shown in fig. 2, the material taking mechanism 100 further includes a first guide driving unit 150 and a second guide driving unit 160, and in conjunction with fig. 3, the rack plate 110 is mounted on the second guide driving unit 160, and the second guide driving unit 160 is mounted on the first guide driving unit 150. For example, the first guide driving unit 150 drives the second guide driving unit 160 to move in a first direction, and the second guide driving unit 160 drives the support plate 110 to move in a second direction. For example, the first direction is a vertical direction and the second direction is a horizontal direction. Thereby enabling the fixed gripper finger 120 and the movable gripper finger 130 of the material taking mechanism 100 to move between the loading mechanism 200 and the sewing machine body 10.

For example, the first guide driving unit 150 includes a first guide rail, a first slider slidably connected to the first guide rail, and a first linear driving unit driving the first slider to slide along the first guide rail; the second guiding driving unit 160 includes a second guide rail, a second slider slidably connected to the second guide rail, and a second linear driving unit driving the second slider to slide along the second guide rail.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims

1. The shuttle changing device (11) is characterized by comprising a material taking mechanism (100) and a material loading mechanism (200), wherein a plurality of stations for loading shuttle shells (300) are arranged on the material loading mechanism (200), the material taking mechanism (100) grabs the old shuttle shells (300) and places the old shuttle shells on the empty stations of the material loading mechanism (200), and the material taking mechanism (100) also grabs the new shuttle shells (300) from the material loading mechanism (200);

the material taking mechanism (100) comprises a support plate (110), a fixed clamping finger (120), a movable clamping finger (130) and a driving component (140), the fixed clamping fingers (120) are fixedly connected to the bracket plate (110), the movable clamping fingers (130) are rotatably connected to the bracket plate (110), the driving assembly (140) comprises a driving member (141) and an elastic member (142), the driving piece (141) can be close to abut against or far away from the movable clamping finger (130), the elastic piece (142) is connected with the bracket plate (110) and the movable clamping finger (130), when the driving piece (141) abuts against the movable clamping finger (130), the movable clamping finger (130) moves towards the fixed clamping finger (120) to clamp the bobbin case (300), when the driving piece (141) is far away from the movable clamping finger (130), the elastic piece (142) drives the movable clamping finger (130) to move reversely to release the bobbin case (300).

2. Shuttle changing device (11) according to claim 1, characterized in that the movable gripper finger (130) comprises a curved portion (130A) and a driving portion (130B), the curved portion (130A) being curved towards the fixed gripper finger (120), and the curved portion (130A) having a tip (130C), the driving portion (130B) being pushable by the driving member (141) to enable the tip (130C) of the movable gripper finger (130) to be inserted into the recess (310) of the bobbin case (300).

3. Shuttle changing device (11) according to claim 1, characterized in that said fixed gripping finger (120) comprises two gripping blocks (121) arranged at intervals, between which gripping blocks (121) the inclined tab (330) of the bobbin case (300) is housed.

4. Shuttle changing device (11) according to claim 3, characterized in that said fixed gripping finger (120) comprises a limit ramp (122) arranged between two of said blocks (121) to abut against a sloping tab (330) of the bobbin case (300).

5. The shuttle changing device (11) according to claim 1, wherein the loading mechanism (200) comprises a loading frame (210) and a turntable (220) rotatably connected to the loading frame (210), the turntable (220) being provided with a plurality of stations spaced at a periphery for loading the bobbin case (300).

6. The shuttle changing device (11) according to claim 5, wherein the loading mechanism (200) further comprises a drive disk (250), the rotating disk (220) being detachably connected to the drive disk (250).

7. The shuttle changing device (11) according to claim 5, wherein the turntable (220) is provided with a plurality of stations, each of the stations being correspondingly provided with a middle positioning member (224) for being inserted into the middle hole (350) of the bobbin case (300) and an outer positioning member (225) for abutting against the outer periphery of the bobbin case (300).

8. The shuttle changing device (11) according to claim 7, wherein the outer positioning member (225) is provided with a limiting groove (226) for catching the outer protrusion (340) of the bobbin case (300).

9. The shuttle changing device (11) according to claim 1, wherein the material taking mechanism (100) further comprises a first guide driving unit (150) and a second guide driving unit (160), the second guide driving unit (160) is disposed on the first guide driving unit (150), the first guide driving unit (150) drives the second guide driving unit (160) to move along a first direction, the support plate (110) is mounted on the second guide driving unit (160), and the second guide driving unit (160) drives the support plate (110) to move along a second direction, so that the fixed clamping fingers (120) and the movable clamping fingers (130) of the material taking mechanism (100) can take materials close to the material loading mechanism (200).

10. A sewing machine, characterized by comprising the shuttle changing device (11) according to any one of claims 1 to 9, and further comprising a sewing machine main body (10), wherein the material taking mechanism (100) removes an old bobbin case (300) on the sewing machine main body (10) and moves the bobbin case (300) to a station where the material loading mechanism (200) is empty, and the material taking mechanism (100) moves a new bobbin case (300) on the material loading mechanism (200) to the sewing machine main body (10).