Mobile doffing head and doffing trolley

Abstract

This invention relates to a mobile doffing head and doffing trolley, comprising a yarn suction tube, a first cutting device positioned above the suction tube for cutting the yarn, and a second cutting device positioned below the suction tube for cutting the yarn. When the suction tube picks up and holds the yarn, a drive mechanism delivers the picked-up yarn to a designated position. The suction tube holds the yarn to maintain uninterrupted spinning, thus completing automatic doffing and sending the yarn to an empty yarn tube for rewinding. The yarn extends vertically, and the first cutting device can be swung to reach the predetermined position where the yarn is to be cut. The first cutting device acts as a yarn shear, and the suction tube below it picks up the yarn end below the cut point for holding. Then, by swaying, the held yarn is sent to a clamp on the right side of the empty yarn tube, where the second cutting device cuts the yarn, and the cut yarn end is sucked away by the suction tube.

Description

Technical Field

[0001] This invention relates to a mobile doffing head and a doffing carriage, mainly used in the automatic doffing carriage of an air-jet spinning machine. Background Technology

[0002] In an air-jet spinning machine, cotton slivers are spun into yarn through a spinning machine. The formed yarn is then wound onto a bobbin. After winding to a predetermined length or weight, the yarn is cut, and the fully wound yarn roll is removed from the spinning machine. This series of actions is called doffing.

[0003] In automated machinery, the doffing head travels to the station where yarn doffing is required and pushes the yarn-wound bobbin into the unloading channel. Existing technologies such as "CN213570892U" and "CN115233344A" disclose such automated machinery. However, "CN115233344A" requires stopping the machine to feed yarn to complete the doffing action, which affects the yarn winding efficiency of other stations. Summary of the Invention

[0004] The purpose of this invention is to provide a movable doffing head that solves the problem of how to automatically doff yarn during continuous spinning.

[0005] To achieve the above objectives, the technical solution adopted by the present invention is as follows:

[0006] This invention provides a movable doffing head, which includes a yarn suction tube, a first cutting device disposed above the yarn suction tube for cutting the yarn, and a second cutting device disposed below the yarn suction tube for cutting the yarn. The yarn suction tube, the first cutting device, and the second cutting device are connected together and the whole can swing around a rotating axis. When the yarn suction tube sucks up and holds the yarn, the drive mechanism delivers the sucked yarn to a designated position. The yarn suction tube holds the yarn to keep spinning uninterrupted, thus completing the automatic doffing and sending the yarn to an empty yarn tube for rewinding.

[0007] Preferably, it further includes a first yarn guide plate and a second yarn guide plate respectively arranged alongside the first cutting device and the second cutting device. The first yarn guide plate is arranged below the first cutting device, and the second yarn guide plate is arranged below the second cutting device. The front ends of the first yarn guide plate and the second yarn guide plate are provided with yarn guiding slopes to guide the yarn. When the yarn is located within the yarn guiding slopes of the first yarn guide plate and the second yarn guide plate, the yarn approaches the suction port of the suction tube and the cutting port of the first cutting device and the second cutting device.

[0008] Furthermore, a yarn placement groove is also provided inside the yarn guide slope, and the yarn placement groove extends from the bottom of the yarn guide slope into the first yarn guide plate or the second yarn guide plate.

[0009] Furthermore, the first cutting device is attached to the first yarn guide plate, and the second cutting device is attached to the second yarn guide plate.

[0010] Furthermore, the corners of the first and second yarn guide plates are rounded to protect the yarn.

[0011] Preferably, the yarn suction tube, the first cutting device, and the second cutting device are connected together so that they can swing simultaneously, and the device also includes a telescopic drive mechanism for driving the yarn suction tube, the first cutting device, and the second cutting device to move forward or backward.

[0012] Preferably, the device further includes a scissor drive mechanism corresponding to the first cutting device and the second cutting device respectively. The drive end of the scissor drive mechanism is connected to the first cutting device or the second cutting device, and the drive end of the scissor drive mechanism drives the first cutting device and the second cutting device to cut the yarn in a manner away from the first cutting device and the second cutting device.

[0013] Preferably, the rear end of the yarn suction tube is further connected to a conveying tube, and the end of the conveying tube is connected to a yarn storage container.

[0014] A doffing trolley is also provided, which adopts the movable doffing head described in any of the aforementioned methods.

[0015] Due to the application of the above technical solution, the present invention has the following advantages compared with the prior art:

[0016] The movable doffing head of the present invention includes a yarn suction tube, a first cutting device, and a second cutting device, which are respectively positioned above and below the yarn suction tube. In the spinning machine, the yarn travels from bottom to top and extends vertically. By swinging, the first cutting device reaches the predetermined position to cut the yarn, cutting it. The yarn suction tube below the first cutting device sucks up the yarn end below the cut point to maintain uninterrupted spinning, meaning the machine continues spinning, and the spun yarn is sucked into the suction tube. Then, by swinging, the yarn is fed to the clamp on the right side of the empty yarn tube. The yarn end is hooked by the clamp and wound around the yarn tube. Since the empty yarn tube is above, the movable doffing head swings to an upward position. At this point, the yarn in the yarn suction tube is aligned with the second cutting device. After the yarn is wound around the empty yarn tube, the second cutting device cuts the yarn, and the cut yarn end is sucked away by the yarn suction tube. Attached Figure Description

[0017] The following sections will describe some specific embodiments of the invention in detail by way of example and not limitation, with reference to the accompanying drawings. The same reference numerals in the drawings denote the same or similar parts or portions. Those skilled in the art should understand that these drawings are not necessarily drawn to scale. In the drawings:

[0018] Figure 1 This is a perspective view of a preferred embodiment of the present invention;

[0019] Figure 2 yes Figure 1 The cross-sectional view shows the inside of the suction tube and the positional relationship between the movable doffing head and the yarn;

[0020] Figure 3 This is a schematic diagram of a movable doffing head preparing to cut the yarn.

[0021] Figure 4 This is a schematic diagram showing the first cutting device in a movable doffing head cutting the yarn.

[0022] Figure 5 This is a schematic diagram of a movable doffing head feeding the yarn to the right clamp of an empty yarn bobbin (the clamp is part of the cradle and is not shown in the diagram).

[0023] Figure 6 This is a schematic diagram showing the second cutting device in a movable doffing head cutting the yarn.

[0024] Figure 7 yes Figure 1 Enlarged view of point A in the middle;

[0025] The reference numerals in the attached figures are explained as follows:

[0026] 1. Yarn suction tube; 2. First cutting device; 3. Second cutting device; 4. Rotating shaft; 5. First yarn guide plate; 6. Second yarn guide plate; 7. Yarn guide slope; 8. Yarn placement groove; 9. Telescopic drive mechanism; 10. Scissor drive mechanism; 11. Conveying pipe; 12. Yarn storage container; 13. Push-pull plate; 131. Guide groove; 14. Cotton bucket; 15. Yarn roll; 16. Yarn; 17. Fixing block; 18. Yarn tube. Detailed Implementation

[0027] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0028] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0029] Furthermore, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0030] like Figure 1 and Figure 2 As shown, the movable doffing head includes a yarn suction tube 1, a first cutting device 2, and a second cutting device 3. The first cutting device 2 is located above the yarn suction tube 1, and the second cutting device 3 is located below the yarn suction tube 1.

[0031] The suction tube 1 is connected to a negative pressure device (not shown in the figure). The suction tube 1 can use negative pressure to suck up the yarn and can transport the yarn to the yarn storage container 12 through the conveying tube 11.

[0032] The first cutting device 2 is provided with a first yarn guide plate 5, and the second cutting device 3 is provided with a second yarn guide plate 6. In this example, the first cutting device 2 is attached to the upper surface of the first yarn guide plate 5, and the second cutting device 3 is attached to the upper surface of the second yarn guide plate 6.

[0033] Both the first cutting device 2 and the second cutting device 3 are used to cut the yarn. The first cutting device 2 and the second cutting device 3 are respectively driven by corresponding scissor drive mechanisms 10 to cut the yarn. Figure 1 and Figure 7 The drive end of the scissor drive mechanism 10 is connected to the push-pull plate 13. The push-pull plate 13 has a guide groove 131, and a guide post connected to the blade of the first cutting device is provided in the guide groove 131. When the push-pull plate 13 is moved backward, the first cutting device 2 can cut the yarn. That is, the drive end of the scissor drive mechanism 10 drives the first cutting device 2 to cut the yarn in a way that moves away from the first cutting device 2, which will not cause the scissor drive mechanism 10 to interfere with the yarn.

[0034] like Figure 3The yarn suction tube 1, the first cutting device 2, the second cutting device 3, the first yarn guide plate 5, and the second yarn guide plate 6 are connected together and driven forward or backward by the telescopic drive mechanism 9. The telescopic drive mechanism 9 is connected to the fixed block 17. The fixed block 17 is provided with a rotating shaft 4, and the entire movable doffing head can rotate around the rotating shaft 4.

[0035] like Figure 1 and Figure 7 Both the first yarn guide plate 5 and the second yarn guide plate 6 have a yarn guiding slope 7 at their front ends. The yarn guiding slope 7 is inclined to guide the yarn into the yarn guiding slope 7. When the yarn is in the yarn guiding slope 7, the yarn is close to the suction port of the suction tube 1 and the cutting ports of the first cutting device 2 and the second cutting device 3, so as to facilitate the suction of the suction tube 1 and the cutting of the first cutting device 2 and the second cutting device 3. Preferably, a yarn placement groove 8 is also provided in the yarn guiding slope 7, which extends from the bottom of the yarn guiding slope 7 into the first yarn guide plate 5 or the second yarn guide plate 6. The corners of the first yarn guide plate 5 and the second yarn guide plate 6 are rounded to protect the yarn.

[0036] The first yarn guide plate 5 and the second yarn guide plate 6 are preferred configurations. In other embodiments, the first yarn guide plate 5 and the second yarn guide plate 6 may not be provided.

[0037] The process is as follows.

[0038] like Figure 3 As shown, the cotton sliver in the cotton spool 14 is spun into yarn 16 by the spinning machine. After the yarn spool 15 is wound with a predetermined length or weight of yarn 16, the movable doffing head swings downward and is driven forward by the telescopic drive mechanism 9 to extend onto the yarn 16. The yarn 16 is then guided into the yarn trough 8 (see...). Figure 1 and Figure 7 ).

[0039] like Figure 4 As shown, the first cutting device 2 cuts the yarn, and the yarn end is sucked into the suction tube 1. The yarn roll 15 completes the winding.

[0040] like Figure 5 As shown, the fully rolled yarn 15 has been removed and replaced with an empty yarn tube 18. The movable doffing head swings upward, sending the yarn to the clamp on the right side of the empty yarn tube 18 (the clamp is part of the cradle and is not shown in the figure). The clamp hooks the yarn and winds it around the yarn tube 18 as the tube rotates.

[0041] like Figure 6 The second cutting device 3 cuts the yarn. The continuously spun yarn is sucked in and collected by the yarn suction tube 1 to achieve uninterrupted spinning and yarn doffing.

[0042] The automatic doffing operation is now complete.

[0043] The above embodiments are only for illustrating the technical concept and features of the present invention. Their purpose is to enable those skilled in the art to understand the content of the present invention and implement it accordingly. They should not be used to limit the scope of protection of the present invention. All equivalent changes or modifications made in accordance with the spirit and essence of the present invention should be covered within the scope of protection of the present invention.

Claims

1. A movable doffing head, characterized in that, It includes a yarn suction tube (1), a first cutting device (2) above the yarn suction tube (1) for cutting the yarn, and a second cutting device (3) below the yarn suction tube (1) for cutting the yarn. The yarn suction tube (1), the first cutting device (2), and the second cutting device (3) are connected together and form an integral unit that can swing around a rotating shaft (4). By swinging, the first cutting device (2) reaches the predetermined position to cut the yarn, and the first cutting device (2) cuts the yarn. The yarn suction tube (1) below the first cutting device (2) sucks up the yarn end below the cut point to maintain uninterrupted spinning, that is, the machine continues to spin. The spun yarn is sucked into the yarn suction tube (1), and then the yarn held by the swing is sent to the clamp on the right side of the empty yarn tube. The yarn end is hooked by the clamp and wrapped around the yarn tube. Since the empty yarn tube is above, the moving yarn doffing is achieved. When the head swings to the upward position, the yarn in the suction tube (1) is aligned with the second cutting device (3). After the yarn is wound onto the empty yarn tube, the second cutting device (3) cuts the yarn. The cut yarn ends are sucked away by the suction tube (1). When the suction tube (1) sucks up the yarn and holds it, the drive mechanism sends the sucked yarn to the designated position. The suction tube (1) holds the yarn to keep spinning uninterrupted, cooperates to complete automatic yarn doffing, and sends the yarn to the empty yarn tube for rewinding. It also includes a scissor drive mechanism (10) respectively corresponding to the first cutting device (2) and the second cutting device (3). The scissor drive mechanism (10) includes a push-pull plate (13) and a guide groove (131). The guide groove (131) is provided with a guide post connected to the blade in the first cutting device (2). When the push-pull plate (13) is pulled back, the first cutting device (2) cuts the yarn.

2. The movable doffing head according to claim 1, characterized in that: It also includes a first yarn guide plate (5) and a second yarn guide plate (6) respectively arranged with the first cutting device (2) and the second cutting device (3). The first yarn guide plate (5) is arranged below the first cutting device (2), and the second yarn guide plate (6) is arranged below the second cutting device (3). The front ends of the first yarn guide plate (5) and the second yarn guide plate (6) are provided with yarn guide slopes (7) to guide the yarn. When the yarn is located in the yarn guide slopes (7) of the first yarn guide plate (5) and the second yarn guide plate (6), the yarn approaches the suction port of the suction tube (1) and the cutting port of the first cutting device (2) and the second cutting device (3).

3. The movable doffing head according to claim 2, characterized in that: The yarn guide slope (7) is also provided with a yarn placement groove (8), which extends from the bottom of the yarn guide slope (7) into the first yarn guide plate (5) and the second yarn guide plate (6).

4. The movable doffing head according to claim 2, characterized in that: The first cutting device (2) is attached to the first yarn guide plate (5), and the second cutting device (3) is attached to the second yarn guide plate (6).

5. The movable doffing head according to claim 2, characterized in that: The corners of the first yarn guide plate (5) and the second yarn guide plate (6) are rounded to protect the yarn.

6. The movable doffing head according to claim 1, characterized in that: The yarn suction tube (1), the first cutting device (2) and the second cutting device (3) are connected together so that they can swing simultaneously. The device also includes a telescopic drive mechanism (9) for driving the yarn suction tube (1), the first cutting device (2) and the second cutting device (3) to move forward or backward.

7. The movable doffing head according to claim 1, characterized in that: The drive end of the scissor drive mechanism (10) is connected to the corresponding cutting device. The drive end of the scissor drive mechanism (10) drives the first cutting device (2) and the second cutting device (3) to cut the yarn in a manner away from the first cutting device (2) and the second cutting device (3).

8. The movable doffing head according to claim 1, characterized in that: The rear end of the yarn suction tube (1) is also connected to a conveying tube, and the end of the conveying tube is connected to a yarn storage container.

9. A doffing carriage, characterized in that, It employs the movable doffing head as described in any one of claims 1 to 8.

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