Seamless attaching mechanism and sewing machine

Abstract

The utility model provides a seamless attaching mechanism and a sewing machine. The seamless attaching mechanism comprises a connecting frame used for being assembled on a sewing machine, and one end of the connecting frame is used for assembling a film; the adjusting frame is movably arranged at the end, away from the film, of the connecting frame, and a first pressing wheel is arranged at the free end of the adjusting frame; the second pressing wheel is assembled on the sewing machine and right faces the first pressing wheel; the guide blocks are arranged at the free end of the adjusting frame, the first guide block is made of a heat conduction material, the face, away from the adjusting frame, of the first guide block is arranged in an arc-shaped guiding mode, a channel is formed in the first guide block, and an air outlet communicated with the channel is formed in the position, right opposite to the first pressing wheel, of the tail end of the first guide block; the heating device is arranged on the sewing machine and used for supplying hot air to the channel and the gap between the first pressing wheel and the second pressing wheel. According to the seamless attaching mechanism and the sewing machine, the cooling speed during adhesive tape pressing can be effectively reduced, and the hot pressing effect is improved.

Description

Technical Field

[0001] This application belongs to the field of sewing equipment technology, and more specifically, relates to a seamless bonding mechanism and a sewing machine. Background Technology

[0002] In the production of seamless underwear, two pieces of fabric are typically joined seamlessly using adhesive strips. Therefore, before joining the two pieces of fabric, the adhesive strip needs to be bonded to the fabric via heat pressing to prepare for subsequent fabric joining processes. During the adhesive strip bonding process, pressure rollers are used to heat-press the strip, softening it and improving the heat pressing effect. In related technologies, the heat pressing structure generally consists of two opposing pressure rollers, a hot air duct positioned opposite the gap between the two pressure rollers, and an adhesive strip guide block. The guide block guides the adhesive strip into the gap between the two pressure rollers. In the aforementioned setup, the hot air duct can only heat the adhesive strip in the direction of its heat pressing inlet. When the adhesive strip enters the gap between the two pressure rollers, the strip cools down rapidly due to the lower temperature of the pressure rollers, resulting in poor heat pressing adhesion. Utility Model Content

[0003] The purpose of this application is to provide a seamless bonding mechanism and sewing machine to solve the technical problem of poor heat pressing of adhesive strips in the production process of seamless underwear in the prior art.

[0004] To achieve the above objectives, the technical solution adopted in the first aspect of this application is to provide a seamless fitting mechanism, comprising:

[0005] A connecting frame for mounting on a sewing machine, one end of which is used to mount a film roll;

[0006] An adjustment frame is movably mounted on the connecting frame at one end away from the film roll, and a first pressure roller is provided at the free end of the adjustment frame;

[0007] The second pressure roller is mounted on the sewing machine and is positioned directly opposite the first pressure roller.

[0008] At least one guide block is provided on the free end of the adjustment frame, wherein the first guide block is made of thermally conductive material, the side of the first guide block away from the adjustment frame is arc-shaped and guided, a channel is provided in the first guide block, and an air outlet connected to the channel is provided at the end of the first guide block and directly opposite the first pressure roller.

[0009] At least one heating device is provided in the sewing machine for supplying hot air to the channel and the gap between the first pressure roller and the second pressure roller.

[0010] Optionally, two guide blocks are provided, and the two guide blocks are spaced apart in the conveying direction between the film roll and the first pressure roller.

[0011] Optionally, both guide blocks are made of thermally conductive material and both have the channels inside.

[0012] Optionally, the end of the first guide block is provided with an arc-shaped concave clearance on the side facing the first pressure roller, and the first pressure roller can be partially accommodated in the clearance; the air outlet is provided in the clearance.

[0013] Optionally, the air outlet is located on the side wall of the clearance position away from the far end of the first guide block, and the air outlet is directed towards the far end of the first guide block.

[0014] Optionally, at least two heating devices are provided; the first guide block is provided with at least a first channel and a second channel, and the second guide block is provided with a third channel; different channels are used to connect the same or different heating devices.

[0015] Optionally, the first channel is connected to the air outlet, and the first channel is connected to the heating device through an air supply duct.

[0016] Optionally, the second channel includes a plurality of arrays of holes that pass through the first guide block, and the third channel includes a plurality of arrays of holes that pass through the second guide block; the second channel and the third channel are respectively used to wind a heat-conducting tube connected to the heating device.

[0017] Optionally, the adjusting frame is rotatably mounted on the connecting frame, and an adjusting screw is connected between the adjusting frame and the connecting frame.

[0018] In a second aspect of this application, a sewing machine is provided, which includes a frame, a drive device, a control module, and the aforementioned seamless bonding mechanism, wherein the seamless bonding mechanism is disposed on the frame; the drive device is used to drive the first pressure roller and the second pressure roller to rotate respectively, and the control module is electrically connected to the heating device.

[0019] The seamless bonding mechanism and sewing machine provided in this application embodiment have at least the following beneficial effects:

[0020] By providing an air outlet connected to the channel at the end of the first guide block and directly opposite the first pressure roller, and the channel being connected to the heating device, the heating device can supply hot air to the gap between the first and second pressure rollers to preheat the adhesive strip. In addition, the heating device can also supply hot air to the channel so that the air outlet can blow hot air onto the first pressure roller, thereby heating the first pressure roller and slowing down the cooling rate of the adhesive strip when it is pressed by the first pressure roller, thus improving the hot pressing effect. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figures 1 to 3 These are perspective views of the seamless fitting mechanism from different angles in some embodiments of this application;

[0023] Figure 4 This is a cross-sectional view of the first guide block in some embodiments of this application;

[0024] Figure 5 This is a cross-sectional view of the second guide block in some embodiments of this application. Detailed Implementation

[0025] To make the technical problems, technical solutions and beneficial effects to be solved by this application clearer, the following describes this application in further detail with reference to the accompanying drawings and embodiments.

[0026] It should be understood that the specific embodiments described herein are merely illustrative of this application and are not intended to limit this application.

[0027] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on the other component or indirectly on that other component.

[0028] When a component is said to be "connected to" another component, it can be directly connected to the other component or indirectly connected to that other component.

[0029] It should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and 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 this application.

[0030] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature.

[0031] In the description of this application, "multiple" means two or more, unless otherwise expressly and specifically defined.

[0032] Please refer to the following: Figures 1 to 5 The seamless bonding mechanism and sewing machine provided in the embodiments of this application will now be described.

[0033] refer to Figures 1 to 3 The seamless bonding mechanism described in the first aspect of this application is used to be assembled on a sewing machine and includes a connecting frame 100, an adjusting frame 200, a first pressure roller 310, a second pressure roller 320, a guide block 500, and a heating device 400.

[0034] The sewing machine (not shown in the figure) in the second aspect embodiment of this application includes a frame, a drive device, a control module, and the seamless bonding mechanism of the first aspect embodiment described above.

[0035] The seamless bonding mechanism is mounted on the frame; the drive device is used to drive the first pressure roller 310 to rotate. Specifically, the drive device is a drive motor and a synchronous belt mechanism. The first pressure roller 310 is synchronously connected to the synchronous belt mechanism, and the drive motor drives the synchronous belt to rotate, thereby driving the first pressure roller 310; the control module is electrically connected to the heating device 400 to control the heating power of the heating device 400.

[0036] Specifically, the connecting frame 100 is used to assemble and connect to the sewing machine, and one end of it is used to assemble the film roll, which can rotate on the connecting frame 100 to release the adhesive strip for heat pressing.

[0037] An adjusting frame 200 is movably mounted on the connecting frame 100 at the end away from where the film is mounted. The position of the adjusting frame 200 relative to the connecting frame 100 is variable. A first pressure roller 310 is provided at the free end of the adjusting frame 200. The first pressure roller 310 is driven to rotate by a drive device (e.g., a motor) mounted on the connecting frame 100. In addition, a second pressure roller 320 is rotatably mounted on the sewing machine. The second pressure roller 320 is located below the first pressure roller 310 and is spaced apart from the first pressure roller 310. The gap between the two is large enough to accommodate one or two layers of fabric and one layer of adhesive strip.

[0038] Guide blocks 500 are disposed on the adjustment frame 200 and at least one is disposed on the adjustment frame 200. In embodiments where multiple guide blocks 500 are disposed, each guide block 500 is a first guide block 510, a second guide block 520, etc., in the extension direction away from the first pressure roller 310.

[0039] Among the guide blocks 500, the first guide block 510 closest to the first pressure roller 310 is made of a heat-conducting material, such as copper. The side of the first guide block 510 away from the adjustment frame 200 is arc-shaped, and its arc-shaped extension direction bends and extends toward the gap entrance between the first pressure roller 310 and the second pressure roller 320, so that the adhesive strip released by the film roll can smoothly enter the gap between the first pressure roller 310 and the second pressure roller 320 under the arc-shaped guidance of the first guide block 510. Furthermore, a channel is provided in the first guide block 510, and an air outlet 512 connected to the aforementioned channel is provided at the end of the first guide block 510 and directly opposite the first pressure roller 310.

[0040] A heating device 400 is disposed on the sewing machine, and at least one is provided. It supplies hot air to the channel in the first guide block 510 and the gap between the first pressure roller 310 and the second pressure roller 320. For example, one, two, or three heating devices 400 may be provided. In the case of two or more heating devices 400, one heating device 400 is used only to supply hot air to the channel on the first guide block 510, while the other heating device 400 supplies hot air solely to the gap between the first pressure roller 310 and the second pressure roller 320. In this embodiment, the heating device 400 is an electric heating element. The inlet end of the heating device 400 is connected to an air supply device, which delivers room temperature air into the heating device 400 for heating, and the heating device 400 outputs hot air.

[0041] It should be understood that the first guide block 510 is provided with at least one channel. In addition to supplying hot air to the air outlet 512, the channel can also heat the first guide block 510, so that the rubber strip guided by the first guide block 510 can be heated by the first guide block 510.

[0042] When the adhesive strip is hot-pressed onto the fabric, the fabric is conveyed by an external conveying device to the gap entrance between the first pressure roller 310 and the second pressure roller 320. At the same time, the hot-pressed adhesive strip is released by the rotation of the film roll and guided by the first guide block 510 to the gap entrance between the first pressure roller 310 and the second pressure roller 320 and above the fabric. While the adhesive strip is being conveyed, the heating device 400 simultaneously supplies hot air to the channel in the first guide block 510 and the gap between the first pressure roller 310 and the second pressure roller 320. During this process, the first pressure roller 310 is heated by the hot air flowing out of the air outlet 512. At the same time, the adhesive strip is also heated as it passes through the gap between the first pressure roller 310 and the second pressure roller 320. When the adhesive strip passes through the gap between the first pressure roller 310 and the second pressure roller 320, under the combined pressure of the second pressure roller 320 and the heated first pressure roller 310, the heated adhesive strip can be well hot-pressed and bonded to the fabric, preparing for the subsequent seamless bonding of the fabric.

[0043] In summary, the seamless bonding mechanism and sewing machine of this application embodiment have an air outlet 512 connected to a channel at the end of the first guide block 510 and directly opposite the first pressure roller 310. The channel is connected to the heating device 400. In this way, the heating device 400 can supply hot air to the gap between the first pressure roller 310 and the second pressure roller 320 to preheat the adhesive strip. The heating device 400 can also supply hot air to the channel so that the air outlet 512 can blow hot air to the first pressure roller 310, thereby heating the first pressure roller 310, slowing down the cooling rate of the adhesive strip when it is pressed by the first pressure roller 310, and improving the hot pressing effect.

[0044] refer to Figures 1 to 3 In some embodiments, two guide blocks 500 are provided, and the two guide blocks 500 are spaced apart in the conveying direction between the film roll and the first pressure roller 310. Specifically, the second guide block 520 is provided between the first guide block 510 and the film roll, and the side of the second guide block 520 and the first guide block 510 used for conveying the adhesive strip are both arc-shaped and guided. At the same time, the first guide block 510 and the second guide block 520 are provided in the same arc extension direction.

[0045] In some embodiments, in addition to the first guide block 510, the second guide block 520 is also made of a thermally conductive material (e.g., copper), and channels are also provided inside the second guide block 520. Like the first guide block 510, the channels in the second guide block 520 are also connected to the heating device 400. Thus, the second guide block 520 can also be preheated, allowing the adhesive strip to be preheated before reaching the first guide block 510, ensuring sufficient preheating before being applied to the fabric to improve the heat-pressing effect.

[0046] Furthermore, in some embodiments, at least two heating devices 400 are provided; the first guide block 510 is provided with at least a first channel 511 and a second channel 513, and the second guide block 520 is provided with a third channel 521. Different channels are used to connect different heating devices 400, or they can be used to connect the same heating device 400; at the same time, there are various implementation methods for connecting heating devices 400 with different channels.

[0047] For example, in a first embodiment, the heating device 400 is an electric heating pack, and the heating device 400 heats the first guide block 510 and the second guide block 520 by supplying hot air to them.

[0048] Specifically, refer to Figure 4 The first channel 511 is connected to the air outlet 512, and a heating device 400 is individually connected to the first channel 511 via an air supply duct. The second channel 513 includes several arrays of holes that penetrate the first guide block 510, and the third channel 521 includes several arrays of holes that penetrate the second guide block 520. The second channel 513 and the third channel 521 are respectively used to wind heat-conducting pipes connected to the heating device 400, and the heat-conducting pipes are used to transport hot air heated by the heating device 400. It should be understood that the diameter of the holes is adapted to the diameter of the heat-conducting pipes so that the heat of the hot air transported by the heat-conducting pipes can be transferred to the guide block 500 through the side wall of the holes, thereby achieving preheating of the rubber strip.

[0049] More specifically, the first guide block 510 and the second guide block 520 can share a single heat pipe, or the first guide block 510 can be wound with a separate heat pipe, and the second guide block 520 can be wound with a separate heat pipe. The heat pipe is wound in the first guide block 510 and the second guide block 520 in the following manner: after passing through each hole, the heat pipe is bent 180° and then passed in the opposite direction into the adjacent hole, and so on until all the heat pipes are passed through the holes in the same guide block 500.

[0050] In the second specific embodiment, the heating device 400 connected to the first channel 511 is an electric heating pack, and its setting method is the same as that of the first embodiment mentioned above, which will not be repeated here; while the second channel 513 and the third channel 521 achieve heating by embedding heating devices, which are electric heating rods.

[0051] Specifically, refer to Figure 4 and Figure 5 The second channel 513 includes several arrays of holes that are disposed through the first guide block 510, and the third channel 521 includes several arrays of holes that are disposed through the second guide block 520; the second channel 513 and the third channel 521 are respectively used to set the electric heating rod.

[0052] refer to Figure 1 , Figure 3 and Figure 4 In some embodiments, the end of the first guide block 510 is provided with an arc-shaped concave relief position 514 on the side facing the first pressure roller 310, and the first pressure roller 310 can be partially accommodated in the relief position 514; the air outlet 512 is provided in the relief position 514. By providing the relief position 514, and the relief position 514 being arc-shaped and concave, the contour of the side wall of the relief position 514 can be adapted to the contour of the first pressure roller 310, so that when hot air flows out from the air outlet 512, the hot air can better cover the surface of the first pressure roller 310.

[0053] More specifically, the air outlet 512 is located on the side wall of the clearance position 514 away from the farthest end of the first guide block 510, and the air outlet 512 is directed towards the farthest end of the first guide block 510. In this way, the flow direction of the hot air flowing out of the air outlet 512 can be consistent with the rotation direction of the first pressure roller 310. At the same time, the arc-shaped concave side wall of the clearance position 514 can also guide the hot air, so that the hot air can be better concentrated at the gap inlet between the first pressure roller 310 and the second pressure roller 320.

[0054] refer to Figures 1 to 3 In some embodiments, the adjusting frame 200 is rotatably mounted on the connecting frame 100, and an adjusting screw 600 is connected between the adjusting frame 200 and the connecting frame 100. Specifically, the adjusting screw 600 includes a first rod 610 and a second rod 620. One end of the first rod 610 is rotatably connected to the connecting frame 100, and one end of the second rod 620 is rotatably connected to the adjusting frame 200. A threaded hole is formed at the other end of the first rod 610, and a thread is formed on the peripheral wall of the other end of the second rod 620. The first rod 610 and the second rod 620 are connected by threads. When the first rod 610 and the second rod 620 rotate relative to each other, the rotation angle of the adjusting frame 200 relative to the connecting frame 100 can be adjusted, that is, the gap distance between the first pressure roller 310 and the second pressure roller 320 can be adjusted.

[0055] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A seamless bonding mechanism for assembly and connection to a sewing machine, characterized in that, include: A connecting frame for mounting on a sewing machine, one end of which is used to mount a film roll; An adjustment frame is movably mounted on the connecting frame at one end away from the film roll, and a first pressure roller is provided at the free end of the adjustment frame; The second pressure roller is mounted on the sewing machine and is positioned directly opposite the first pressure roller. At least one guide block is provided on the free end of the adjustment frame, wherein the first guide block is made of thermally conductive material, the side of the first guide block away from the adjustment frame is arc-shaped and guided, a channel is provided in the first guide block, and an air outlet connected to the channel is provided at the end of the first guide block and directly opposite the first pressure roller. At least one heating device is provided in the sewing machine for supplying hot air to the channel and the gap between the first pressure roller and the second pressure roller.

2. The seamless attachment mechanism of claim 1, wherein: Two guide blocks are provided, namely the first guide block and the second guide block; the two guide blocks are spaced apart in the conveying direction between the film and the first pressure roller.

3. The seamless attachment mechanism of claim 2, wherein: Both guide blocks are made of thermally conductive material and each has the aforementioned channel inside.

4. The seamless attachment mechanism of claim 1, wherein: The end of the first guide block has an arc-shaped concave clearance on the side facing the first pressure roller, and the first pressure roller can be partially accommodated in the clearance; the air outlet is disposed in the clearance.

5. The seamless attachment mechanism of claim 4, wherein: The air outlet is located on the side wall of the clearance position away from the far end of the first guide block, and the air outlet is directed towards the far end of the first guide block.

6. The seamless attachment mechanism of claim 3, wherein: The heating device is provided in at least two ways; the first guide block is provided with at least a first channel and a second channel, and the second guide block is provided with a third channel; different channels are used to connect the same or different heating devices.

7. The seamless bonding mechanism as described in claim 6, characterized in that: The first channel is connected to the air outlet, and the first channel is connected to the heating device through an air supply duct.

8. The seamless bonding mechanism as described in claim 6, characterized in that: The second channel includes several arrays and is disposed through holes in the first guide block; the third channel includes several arrays and is disposed through holes in the second guide block; the second channel and the third channel are respectively used to wind a heat-conducting pipe connected to the heating device.

9. The seamless attachment mechanism of claim 1, wherein: The adjusting frame is rotatably mounted on the connecting frame, and an adjusting screw is connected between the adjusting frame and the connecting frame.

10. A sewing machine characterized by: The device includes a frame, a drive unit, a control module, and a seamless bonding mechanism as described in any one of claims 1 to 9, wherein the seamless bonding mechanism is disposed on the frame; the drive unit is used to drive the first pressure roller and the second pressure roller to rotate, and the control module is electrically connected to the heating device.

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