Method for unloading sewn tubular fabric and machine for sewing tubular fabric

Abstract

The invention discloses a method for unloading a sewn tubular fabric, which is characterized in that the tubular fabric is wrapped on the outer wall of the lower end of a sock turning tube at the upper part by utilizing the elasticity of the tubular fabric, and negative pressure is generated in the sock turning tube to suck the tubular fabric; comprising a telescopic rod, and the head of the telescopic rod extends into the sock turning tube from bottom to top to help the tubular fabric to be sucked into the sock turning tube and then be detached. A machine utilizing such a method is also disclosed. By means of the sock turning device, it can be guaranteed that sewn tubular fabric is sucked into the sock turning pipe.

Description

Technical Field

[0001] The present invention belongs to the technical field of knitting machinery, and in particular relates to a machine for knitting and sewing tubular fabrics, that is, a sock machine for knitting and sewing in one, and more specifically, relates to a method for unloading a sewn tubular fabric and a machine for sewing the tubular fabric. Background Art

[0002] The mainstream hosiery machines at present are intelligent hosiery machines, that is, they can automatically sew after knitting and turn over to be unloaded from the machine with the front side facing outward. The most representative technical solutions are recorded in Chinese patents CN200980108857.2, CN200980108858.7, CN200980108882.0 and CN200980120878.6, especially in CN200980108858.7, which records a method for sewing tubular fabrics and unloading the sewn fabrics. The present invention is a further improvement on this solution.

[0003] In the above-mentioned prior art, the machine for sewing fabrics includes a supporting mechanism and a sewing mechanism arranged at the upper part, the lower part arranged at the lower part and the middle part of the machine. In the initial state, the fabric to be sewn is hooked on the supporting mechanism, and the main part of the fabric is suspended in the turning tube at the lower part; then the turning tube moves upward and is connected to the upper part, during which the fabric is still hooked on the supporting mechanism, but its main part is turned onto the outer surface of the turning tube and presents a state where the inner side faces outward; then the supporting mechanism is folded in half, and the sewing mechanism approaches the folded fabric and sews; after the sewing is completed, the fabric is sucked away from the top of the turning tube by the negative pressure generated by the turning tube connected to the upper part, that is, the fabric is unloaded.

[0004] The last step mentioned above, i.e. the process of removing the fabric, requires the fabric that was originally wrapped outside the sock tube with elasticity to be sucked into the sock tube from the lower end of the sock tube. In order to achieve this goal, the prior art adopts some technical means. First, the negative pressure in the sock tube is increased at this time in order to generate greater suction; second, an auxiliary sliding device is set outside the sock tube. The auxiliary sliding device can be matched or disengaged relative to the fabric, and can move up and down along the axis of the sock tube. In fact, it simulates the action of "pulling" by the hand, pressing the fabric and then moving downward, so as to pull the fabric down and make it easier to be sucked into the sock tube. In actual production, when processing harder fabrics, the above technical means cannot guarantee that the fabric is sucked into the sock tube, and there is still a certain failure rate. The fabric will stay outside the sock tube, thus affecting the next step.

[0005] On the other hand, in order to allow the fabric to enter the sock turning tube smoothly when the sock turning tube is at the bottom of the machine, it is necessary to allow the lower part to perform certain actions. For example, the utility model patent 202020059007,1 that the applicant has applied for, relates to a moving device for the sock suction tube of a sock sewing machine, including a guide device and a drive device, the guide device including a guide part fixed to the frame of the sock sewing machine and a moving part that makes an inclined motion along the guide part, the moving part is fixed with a sock suction tube, the two ends of the drive device are respectively hinged to the fixed part and the sock suction tube, the drive device changes its own length and rotation angle to change the distance between the hinge points at both ends, so that the sock suction tube reciprocates under the guidance of the guide device. The sock suction tube, that is, the sock turning tube described in this application; when it is at the bottom, it moves obliquely a certain distance to facilitate the suction of the knitted socks, and then turns the socks over in the process of returning to its original position and moving upward to the upper part. That is, the technical solution for moving the sock turning tube obliquely has been recorded in the prior art. Summary of the invention

[0006] The object of the present invention is to provide a method for unloading a sewn tubular fabric and a machine for sewing tubular fabrics using the method, so as to ensure that any type of fabric can be sucked into the sock turning tube and unloaded smoothly.

[0007] The present invention adopts the following technical scheme: a method for removing the sewn tubular fabric, wherein the tubular fabric is wrapped around the outer wall of the lower end of the sock turning tube at the upper part by its own elasticity, and negative pressure is generated in the sock turning tube to absorb the tubular fabric; the characteristic is that it includes a telescopic rod, the head of the telescopic rod extends from bottom to top into the sock turning tube, helps the tubular fabric to be sucked into the sock turning tube, and then is removed.

[0008] The telescopic rod is installed on the side wall of the lower component. The lower component first moves until the extension line of the telescopic rod falls into the sock turning tube, and then the telescopic rod is extended.

[0009] The lower component moves horizontally or its movement has a horizontal component.

[0010] The present invention also adopts such a technical solution: a machine for sewing tubular fabrics, comprising an upper component arranged at the top, a lower component arranged at the bottom, and a supporting mechanism and a sewing mechanism arranged in the middle of the machine, and also comprising a sock-turning tube that moves back and forth between the upper component and the lower component. In the initial state of sewing the fabric, the sock-turning tube is connected to the lower component; during the sewing process, the sock-turning tube is connected to the upper component and is connected to a negative pressure air source; it is characterized in that: it also comprises a telescopic rod, which has two states of extension and retraction. When the telescopic rod is in the retracted state, its end is lower than the lower end of the sock-turning tube connected to the upper component; when the telescopic rod is in the extended state, its end is higher than the lower end of the sock-turning tube connected to the upper component and enters the sock-turning tube.

[0011] Furthermore, the telescopic rod is installed on the side wall of the lower component; the lower component has a track, so that the lower component can generate horizontal displacement along the track as a whole.

[0012] The end of the telescopic rod has a smooth surface.

[0013] Since the sock turning tube needs to be moved between the upper assembly and the lower assembly, it is obvious that the upper assembly and the lower assembly should be coaxial, and the sock turning tube always moves up and down along its own axis. Therefore, when the sock turning tube is in the upper assembly, there is no space below it for placing the telescopic rod. The method adopted by the present invention is that the lower assembly can be moved in the horizontal direction. Generally, the lower assembly moves along a horizontal track or an inclined track, while the axis of the lower assembly always remains vertical; through this method, the lower assembly can move a certain distance in the horizontal direction, so that the telescopic rod originally on its side wall is just located below the sock turning tube of the upper assembly and can be extended into the sock turning tube.

[0014] The timing for extending the telescopic rod is after the sewing is completed. At this time, the ends of the tubular fabric have been closed and can be considered as a complete entity. Therefore, the end of the telescopic rod will inevitably poke the fabric and give the fabric an upward force, prompting the fabric to move upward in the sock turning tube, and drive the part that remains outside the sock turning tube into the sock turning tube. This way of applying force is more direct and the effect is more obvious. The travel of the telescopic rod can be adjusted according to the length of the fabric to ensure that the fabric is completely poked into the sock turning tube. Of course, the auxiliary sliding device mentioned in the background technology part does not conflict with the present invention and can be used at the same time to obtain better results.

[0015] It can be seen that the present invention can ensure that the sewn tubular fabric is sucked into the turned-over sock tube. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figures 1 to 3 It is a schematic diagram of the working process of the present invention. DETAILED DESCRIPTION

[0017] Some technical features of this embodiment are prior art, so the drawings and embodiments only describe the key parts with simplified schematic diagrams, and the rest of the related contents can be found in the prior art documents mentioned in the background technology section.

[0018] This embodiment includes an upper assembly 1 and a lower assembly 2. When they are on the same axis, the sock turning tube 3 can move between the upper assembly and the lower assembly and is respectively connected and supported on the upper assembly or the lower assembly. The side wall of the lower assembly is provided with a telescopic rod support seat 40, the main body of which is a cylinder. The telescopic rod 4 is installed in the telescopic rod support seat 40 and is driven to extend upward or retract downward; the telescopic rod 4 has a smooth end 41.

[0019] Figure 1 The state shown is that the socks 00 have been stitched, which is represented by an irregular curve in the figure. Since the stitching is completed, the support mechanism and the stitching mechanism for hooking the socks have left this working area. At this time, the socks 00 are a tubular fabric with one end closed, wrapped around the lower end of the sock turning tube, and the closed end of the sock wraps and covers the lower end surface of the sock turning tube 3. The auxiliary sliding mechanism 31 in the upper component has completed the action of pulling the socks down, but it is not enough to make the socks completely enter the sock turning tube. In the figure, the lower component 2 moves a certain distance in the horizontal direction, so that it is not coaxial with the upper component, and the extension line of the telescopic rod of the side wall falls inside the sock turning tube 3.

[0020] Figure 2 The state shown is that the telescopic rod 4 is extended upward, and the end portion 41 thereof enters into the sock turning tube 3 , pushing the sock 00 into the sock turning tube 3 .

[0021] Figure 3 The state shown is that the telescopic rod returns to its original position, and the socks 00 are pulled out of the upper assembly under the action of negative pressure, and will leave the machine in the negative pressure pipe (not shown), that is, be unloaded.

Claims

1. A method for removing a sewn tubular fabric, wherein the tubular fabric is wrapped around the outer wall of the lower end of the upper sock tube by its own elasticity, and negative pressure is generated in the sock tube to absorb the tubular fabric; characterized in that: The utility model comprises a telescopic rod, the head of which extends upward from bottom to top into the sock turning tube to help the tubular fabric to be sucked into the sock turning tube and then unloaded.

2. The method for removing a sewn tubular fabric according to claim 1, characterized in that: The telescopic rod is installed on the side wall of the lower component. The lower component first moves until the extension line of the telescopic rod falls into the sock turning tube, and then the telescopic rod is extended.

3. The method for removing a sewn tubular fabric according to claim 2, characterized in that: The lower component moves horizontally or its movement has a horizontal component.

4. A machine for sewing tubular fabrics, comprising an upper assembly arranged at the top, a lower assembly arranged at the bottom, and a supporting mechanism and a sewing mechanism arranged in the middle of the machine, and also comprising a sock turning tube reciprocating between the upper assembly and the lower assembly, wherein the sock turning tube is connected to the lower assembly in the initial state of sewing the fabric; during the sewing process, the sock turning tube is connected to the upper assembly and connected to a negative pressure gas source; characterized in that: It also includes a telescopic rod, which has two states: extended and retracted. When the telescopic rod is in the retracted state, its end is lower than the lower end of the sock-turning tube connected to the upper component; when the telescopic rod is in the extended state, its end is higher than the lower end of the sock-turning tube connected to the upper component and enters the sock-turning tube.

5. A machine for sewing tubular fabrics according to claim 4, characterized in that: The telescopic rod is installed on the side wall of the lower component; the lower component has a track, so that the lower component can generate horizontal displacement along the track as a whole.

6. A machine for sewing tubular fabrics according to claim 4 or 5, characterized in that: The end of the telescopic rod has a smooth surface.

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