A towel embroidery thread breakage detection mechanism

Abstract

The utility model discloses a kind of towel embroidery thread break detection mechanism, including support, two wire guide plates are equipped on support, wire guide plate is equipped with thread clipper between, each thread clipper top is equipped with thread guide and thread loosener, the thread guide is composed of two wheel bodies articulated in the front of support, shaft body is equipped on wheel body rotation center line, shaft body rear side end extends to the back of support and is vertically connected with grating piece, the back of support is equipped with the light coupling component corresponding with grating piece one by one.The utility model provides a kind of towel embroidery thread break detection mechanism, it is favorable to solve the thread break detection structure of some present towel embroidery, because embroidery thread and thread guide wheel main contact surface only located inside, when embroidery thread appears tension fluctuation in the process of threading, then it is easy to cause embroidery thread and thread guide wheel to appear unstable contact, cannot stably and effectively drive grating piece rotation, further lead to the problem of thread break signal false detection.

Description

Technical Field

[0001] This utility model relates to the field of thread breakage detection devices, and in particular to a thread breakage detection mechanism for towel embroidery. Background Technology

[0002] Towel embroidery involves applying towel-like embroidery stitches to the fabric surface, giving the embroidery patterns multi-layered, novel, and three-dimensional characteristics. It also enables the mixing of flat embroidery and towel embroidery, greatly improving the usability of computerized embroidery machines and expanding their application areas. It can be widely used in industries such as clothing, home decorations, and handicrafts.

[0003] Chinese patent CN201891021 U discloses a towel embroidery thread breakage detection device, comprising a thread clamp frame with two or more thread clamps. A thread guide wheel and a thread release device are sequentially arranged along each thread clamp on the thread clamp frame. Each thread guide wheel is connected at one end to a grating plate that provides optical signals to an optocoupler. The optocouplers and grating plates are arranged in a one-to-one correspondence. This device utilizes a one-to-one correspondence between optocouplers and grating plates, abandoning the more complex traditional slider structure. The fixed relative positions of the optocouplers and grating plates significantly reduce the failure rate and improve detection accuracy, enabling the application of the grating thread breakage detection method in towel embroidery.

[0004] In the above technical solution, the thread guide wheel connected to the grating plate consists of a male thread guide wheel piece, a female thread guide wheel piece, and a thread guide wheel seat that are interlocked with each other. After passing through the thread clamp, the embroidery thread is wound around one side of the thread guide wheel. In this single-sided winding method, since the main contact surface between the embroidery thread and the thread guide wheel is only located on the inner side, when the tension of the embroidery thread fluctuates during the threading process, it is easy to cause the contact between the embroidery thread and the thread guide wheel to be lost, that is, the contact is unstable and cannot stably and effectively drive the grating plate to rotate, which in turn leads to false detection of thread breakage signal. Utility Model Content

[0005] This utility model provides a towel embroidery thread breakage detection mechanism, which helps to solve the problem that some existing towel embroidery thread breakage detection structures have the main contact surface between the embroidery thread and the thread guide wheel located only on the inner side. When the tension of the embroidery thread fluctuates during the threading process, it is easy to cause unstable contact between the embroidery thread and the thread guide wheel, which cannot stably and effectively drive the grating plate to rotate, thus leading to false detection of thread breakage signals.

[0006] This utility model is implemented as follows:

[0007] A towel embroidery thread breakage detection mechanism includes a support frame with two longitudinally spaced guide plates. The guide plates have holes for threading the embroidery thread. Several transversely spaced thread clamps are arranged between the guide plates. Each thread clamp has a thread guide and a thread release mechanism at its top. Each thread guide consists of two wheels hinged to the front of the support frame. Each wheel includes a fixed structure and a movable structure connected by bearings. The fixed structure is detachably connected to the support frame. The movable structure includes at least a shaft located on the rotation center line of the wheel. The shaft is horizontally oriented sequentially, and its rear end extends to the back of the support frame and is vertically connected to a grating plate. Optical couplers corresponding to the grating plates are provided on the back of the support frame. A collar is detachably provided on the outer periphery of each wheel. Adjacent sides of two wheels in the same thread guide form a clamping gap for holding the embroidery thread. When the embroidery thread passes through the clamping gap, it can drive the movable parts of the wheel to rotate. During this process, the grating plate can rotate with the shaft, working in conjunction with the optical couplers to form a grating thread breakage detection structure.

[0008] Based on the above technical solution, the outer radial end of the wheel body is provided with a radial mounting groove so that the outer radial end of the wheel body forms a "U" shaped cross-sectional structure, and the collar is fitted into the mounting groove.

[0009] Based on the above technical solution, the collar is made of elastic material, and its outer end has a flat end face, and several anti-slip textures are evenly distributed on the flat end face.

[0010] Based on the above technical solution, the anti-slip texture is a flange structure that is centrally symmetrically distributed relative to the axial center line of the wheel body. The flange structure and the collar are an integral structure, and the thickness of the flange is no more than half of the radial thickness of the collar.

[0011] Based on the above technical solution, the inner radial end of the wheel body is provided with a support beam, and the shaft body is vertically fixed at the center of the rear side of the support beam; the front and rear axial sides of the wheel body are provided with axial mounting grooves, and the axial mounting groove located on the rear axial side of the wheel body is connected to a bearing, and the fixed end of the bearing is connected to a plug-in sleeve, which is detachably connected to the front of the bracket.

[0012] Based on the above technical solution, the bottom of the radial mounting groove is provided with a protruding ridge, and the bottom of the collar is provided with a fitting groove that matches the protruding ridge. The protruding ridge can be inserted into the fitting groove to form a snap-fit ​​structure.

[0013] Based on the above technical solution, the flat end face of the outer radial side of the collar is provided with an inner groove, which is an annular radial inner groove structure.

[0014] Based on the above technical solution, a bearing is also installed in the axial mounting groove located on the front side of the wheel body. The fixed ends of the bearings on the front and rear sides are connected by an association plate, which is a "U"-shaped plate structure set on the outside of the wheel body.

[0015] Based on the above technical solution, the front and rear sides of the thread guide are provided with movable guide rods for winding the embroidery thread, and a position adjustment structure is provided between the movable guide rods and the bracket.

[0016] Compared with the prior art, the present invention has at least the following advantages:

[0017] 1. This utility model optimizes the structure of the thread guide by designing the contact surface between the embroidery thread and the thread guide wheel to have contact on both sides, avoiding instability caused by fluctuations in thread tension. This increases the contact area between the embroidery thread and the thread guide wheel, improving the stability between them. Even if there are slight tension fluctuations in the embroidery thread during its movement, it can still stably and effectively drive the grating plate to rotate, thereby reducing false detections of thread breakage.

[0018] 2. The grating sheet in this invention can stably follow the rotation of the shaft and work with the optocoupler assembly to accurately detect the disconnection signal, reducing the false detection rate.

[0019] 3. The wheel body and the bracket in this utility model are detachably connected, which facilitates installation and maintenance.

[0020] 4. By setting a collar, the anti-slip texture on the collar can increase the friction between the embroidery thread and the collar, preventing the embroidery thread from slipping relative to the wheel during the threading process, thereby improving the stability of the linkage structure, that is, improving the accuracy of grating thread breakage detection. Attached Figure Description

[0021] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained from these drawings without creative effort.

[0022] Figure 1 This is a simplified front view of the towel embroidery thread breakage detection mechanism in one embodiment;

[0023] Figure 2 for Figure 1 Side view of the towel embroidery thread breakage detection agency;

[0024] Figure 3 This is a schematic diagram of the wire guide in one embodiment;

[0025] Figure 4 for Figure 3 A partial sectional view of a single thread-passing wheel;

[0026] Figure 5This is a partial cross-sectional view of a single thread guide wheel in one embodiment;

[0027] Figure 6 This is a side view of the cable guide in one embodiment.

[0028] The diagram is labeled as follows: 100, bracket; 110, conductor plate; 120, adjustment hole; 200, wire clamp; 300, wire guide; 310, wheel body; 311, radial mounting groove; 312, protruding ridge; 313, axial mounting groove; 320, support beam; 330, shaft body; 331, slot; 340, collar; 341, anti-slip texture; 342, fitting groove; 343, inner groove; 350, bearing; 360, plug-in sleeve; 370, connecting plate; 400, wire releaser; 500, movable guide rod; 600, grating sheet; 700, optocoupler assembly. Detailed Implementation

[0029] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model. Therefore, the following detailed description of the embodiments of this utility model provided in the accompanying drawings is not intended to limit the scope of the claimed utility model, but merely to represent selected embodiments of this utility model.

[0030] In the description of this utility model, 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 indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0031] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly on the other element or there may be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the element or there may be an intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0032] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0033] Example 1: Combination Figures 1 to 4 This embodiment discloses a towel embroidery thread breakage detection mechanism, which aims to improve the stability between the embroidery thread and the thread guide wheel by optimizing the structure of the thread guide, thereby effectively reducing the false detection of thread breakage.

[0034] The towel embroidery thread breakage detection mechanism specifically includes a vertically arranged bracket 100 for connecting external equipment. The bracket 100, as the supporting component of the entire thread breakage detection mechanism, needs to possess sufficient strength and stability. In this embodiment, the bracket 100 is made of high-quality steel, featuring robustness and durability. The bracket 100 is equipped with two longitudinally spaced guide plates 110. The guide plates 110 are made of angle iron strips with drilled holes to provide perforations for guiding the embroidery thread. The position and size of the perforations are determined according to actual needs to ensure smooth passage of the embroidery thread.

[0035] Two horizontally spaced thread clamps 200 are provided between the guide plates 110. Each thread clamp 200 has a thread guide 300 and a thread releaser 400 at its top. The thread guide 300 has movable guide rods 500 on its front and rear sides. The embroidery thread first passes through the bottom guide plate 110 and then through the thread clamp 200, which provides the basic tension of the embroidery thread. When the embroidery thread passes through the thread guide 300, it drives the shaft 330 to rotate, and simultaneously drives the grating plate 600 to rotate, providing an optical signal to the optocoupler assembly 700 to determine whether the thread is broken (the judgment is that the rotation of the grating plate 600 indicates normal operation, and the grating plate 600 stops rotating, indicating a broken thread and triggering an alarm). Then it reaches the thread releaser 400, passes through the top guide plate 110, and reaches the hook to complete the towel embroidery.

[0036] The thread clamp 200 is used to hold and guide the embroidery thread. The thread clamp 200 is made of high-quality alloy material, possessing high strength and good wear resistance. The thread clamps 200 are laterally spaced, and their number and position can be adjusted according to actual needs to accommodate the embroidery requirements of different patterns. Both the thread clamp 200 and the thread releaser 400 are existing technologies; their specific structures and working principles can be found in the relevant content of patent CN201891021U, and will not be elaborated further here. Those skilled in the art can select and implement the appropriate model from the existing technology based on actual operational needs.

[0037] The thread guide 300 has movable guide rods 500 on both the front and rear sides for winding the embroidery thread. A position adjustment structure is provided between the movable guide rods 500 and the bracket 100. Specifically, the position adjustment structure is an adjustment hole 120 set on the bracket 100. The adjustment hole 120 is a strip-shaped through hole structure that passes through the bracket 100 from front to back. The movable guide rods 500 are installed by bolts and can be adjusted in position according to actual needs, thereby adjusting the winding angle of the embroidery thread on both the front and rear sides of the thread guide 300 to adjust the size of the thread-wheel contact surface, thereby optimizing the thread path and tension.

[0038] Furthermore, the thread guide 300 is one of the core components of this utility model, used to increase the contact area between the embroidery thread and the thread guide wheel and improve stability. The thread guide 300 consists of two wheels 310 hinged to the front of the bracket 100. Each wheel 310 includes a fixed structure and a movable structure connected by a bearing 350. The fixed structure is detachably connected to the bracket 100 for easy installation and disassembly. The movable structure includes a shaft 330 located on the rotation center line of the wheel 310, with the shaft 330 arranged horizontally in a front-to-back orientation. The rear end of the shaft 330 extends to the back of the bracket 100 and is vertically connected to a grating sheet 600 via a slot 331. The grating sheet 600 corresponds one-to-one with the optocoupler assembly 700 on the back of the bracket 100. Both the grating sheet 600 and the optocoupler assembly 700 are existing technologies. Their specific structures and working principles can be found in the relevant content of patent CN200971421Y, and will not be repeated here. Those skilled in the art can select and implement them from the existing technology according to actual operating conditions.

[0039] To improve the contact area and stability between the wheel 310 and the embroidery thread, a detachable collar 340 is provided on the outer periphery of the wheel 310. The collar 340 is made of an elastic material (rubber), possessing a certain degree of elasticity and resilience to accommodate minor fluctuations in the embroidery thread during threading. The outer end of the collar 340 has a flat end face, evenly distributed with several anti-slip textures 341. The anti-slip textures 341 increase the friction between the embroidery thread and the collar 340, preventing the thread from slipping during threading.

[0040] The two wheels 310 in the same thread guide 300 form a clamping gap on adjacent sides to hold the embroidery thread. When the embroidery thread passes through the clamping gap, it can drive the moving parts of the wheel 310 to rotate. During this process, the grating plate 600 can rotate with the shaft 330, and together with the optocoupler assembly 700, they form a grating thread breakage detection structure.

[0041] Furthermore, such as Figure 4As shown, the outer radial end of the wheel body 310 is provided with a radial mounting groove 311 so that the outer radial end of the wheel body 310 forms a "U" shaped cross-sectional structure. The collar 340 is fitted into the mounting groove. After the collar 340 is installed, its outer end extends to the outer end of the radial mounting groove 311 to abut against the embroidery thread.

[0042] To improve the holding stability of the embroidery thread, the outer end of the collar 340 has a flat end face, and several anti-slip patterns 341 are evenly distributed on the flat end face. The anti-slip patterns 341 can increase the friction between the embroidery thread and the collar 340, preventing the embroidery thread from slipping during the stitching process. In this embodiment, the anti-slip patterns 341 are flange structures that are centrally symmetrically distributed relative to the axial center line of the wheel body 310. This flange structure is an integral structure with the collar 340, and the thickness of the flange is no more than half of the radial thickness of the collar 340. This structure can ensure the overall structural stability of the collar 340 and also provide a reliable anti-slip effect.

[0043] To further improve the stability and durability of the wheel body 310 and reduce the weight of the movable structure, a support beam 320 is provided on the radial inner end of the wheel body 310, and the rest is a hollow structure. The shaft body 330 is vertically fixed to the center of the rear side of the support beam 320. The wheel body 310 has axial mounting grooves 313 on both the front and rear sides. The axial mounting groove 313 located on the rear side of the wheel body 310 is connected to a bearing 350. The fixed end of the bearing 350 is connected to a plug-in sleeve 360. The plug-in sleeve 360 ​​is detachably connected to the front of the bracket 100 (the bracket 100 is provided with a matching socket structure), which facilitates the installation and removal of the wheel body 310.

[0044] To increase the connection strength between the collar 340 and the wheel body 310, a protruding rib 312 is provided at the bottom of the radial mounting groove 311, and a fitting groove 342 adapted to the protruding rib 312 is provided at the bottom of the collar 340. The protruding rib 312 can be inserted into the fitting groove 342 to form a snap-fit ​​structure, which further improves the connection stability between the wheel body 310 and the collar 340.

[0045] Example 2: Based on Example 1, combined with Figure 5 As shown, in this embodiment, to optimize the structural design of the collar 340, an inner groove 343 is provided on the flat end face of the radially outer side of the collar 340. The inner groove 343 is an annular radially inner slot structure, which can reduce the weight of the collar 340 and increase its elasticity. This design allows the collar 340 to deform more easily when subjected to embroidery thread tension, thereby better adapting to the fluctuation of the embroidery thread and helping to prevent the embroidery thread from falling out of the clamping gap. It should be noted that the depth of the inner groove 343 is less than the outer diameter of the embroidery thread.

[0046] Example 3: Based on Example 1, combined with Figure 6As shown, to further improve the stability and durability of the wire guide 300, a bearing 350 is also installed in the axial mounting groove 313 located on the axial front side of the wheel body 310. The fixed ends of the bearings 350 on both the front and rear sides are connected by an association plate 370, which is a "U"-shaped plate structure located on the outside of the wheel body 310. The association plate 370 can increase the connection strength between the bearings 350 and prevent the bearings 350 from loosening or falling off during long-term use.

[0047] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A towel embroidery thread breakage detection mechanism, characterized in that, The system includes a support (100), on which are provided two longitudinally spaced guide plates (110). Each guide plate (110) has holes for threading the embroidery thread. Between the guide plates (110) are several transversely spaced thread clamps (200). Each thread clamp (200) has a thread guide (300) and a thread releaser (400) at its top. The thread guide (300) consists of two wheels (310) hinged to the front of the support (100). Each wheel (310) includes a fixed structure and a movable structure connected by a bearing (350). The fixed structure is detachably connected to the support (100), and the movable structure includes at least an axle located on the rotation center line of the wheel (310). The body (330) and the shaft (330) are arranged horizontally in succession. The rear end of the shaft (330) extends to the back of the bracket (100) and is vertically connected to the grating plate (600). The back of the bracket (100) is provided with an optical coupler assembly (700) corresponding to the grating plate (600). The outer periphery of the wheel (310) is detachably provided with a collar (340). The adjacent sides of the two wheels (310) in the same thread guide (300) form a clamping gap for clamping the embroidery thread. When the embroidery thread passes through the clamping gap, it can drive the moving parts of the wheel (310) to rotate. During this process, the grating plate (600) can rotate with the shaft (330) and work with the optical coupler assembly (700) to form a grating thread breakage detection structure.

2. The towel embroidery thread breakage detection mechanism according to claim 1, characterized in that, The outer radial end of the wheel body (310) is provided with a radial mounting groove (311) so that the outer radial end of the wheel body (310) forms a "U" shaped cross-sectional structure, and the collar (340) is fitted into the mounting groove.

3. The towel embroidery thread breakage detection mechanism according to claim 2, characterized in that, The collar (340) is made of elastic material, and its outer end has a flat end face, and a number of anti-slip textures (341) are evenly distributed on the flat end face.

4. The towel embroidery thread breakage detection mechanism according to claim 3, characterized in that, The anti-slip texture (341) is a flange structure that is centrally symmetrically distributed relative to the axial center line of the wheel body (310). The flange structure and the collar (340) are an integral structure, and the thickness of the flange is no more than half of the radial thickness of the collar (340).

5. The towel embroidery thread breakage detection mechanism according to claim 1, characterized in that, The inner radial end of the wheel body (310) is provided with a support beam (320), and the shaft body (330) is vertically fixed at the center of the rear side of the support beam (320); the front and rear sides of the wheel body (310) are provided with axial mounting grooves (313), and the axial mounting groove (313) located on the rear side of the wheel body (310) is connected to a bearing (350). The fixed end of the bearing (350) is connected to a plug-in sleeve (360), and the plug-in sleeve (360) is detachably connected to the front of the bracket (100).

6. The towel embroidery thread breakage detection mechanism according to claim 3, characterized in that, The radial mounting groove (311) has a protruding ridge (312) at the bottom, and the collar (340) has a fitting groove (342) at the bottom that matches the protruding ridge (312). The protruding ridge (312) can be inserted into the fitting groove (342) to form a snap-fit ​​structure.

7. The towel embroidery thread breakage detection mechanism according to claim 3, characterized in that, The collar (340) has an inner groove (343) on its flat end face on the radial outer side. The inner groove (343) is an annular radial inner groove structure.

8. The towel embroidery thread breakage detection mechanism according to claim 5, characterized in that, A bearing (350) is also provided in the axial mounting groove (313) located on the front side of the wheel body (310). The fixed ends of the bearings (350) on the front and rear sides are connected by an association plate (370). The association plate (370) is a "U"-shaped plate structure located on the outside of the wheel body (310).

9. The towel embroidery thread breakage detection mechanism according to claim 1, characterized in that, The thread guide (300) has movable guide rods (500) on both the front and rear sides for winding the embroidery thread, and a position adjustment structure is provided between the movable guide rods (500) and the bracket (100).

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