Knotting mechanism and warp knitting machine

Abstract

The application discloses a knotting mechanism and a warp binding machine. The knotting mechanism comprises a knotting assembly and an adjusting assembly. The knotting assembly comprises a winding tube, a yarn hooking piece and a yarn lifting needle. The yarn hooking piece and the yarn lifting needle are respectively slidably connected to the winding tube. The winding tube is provided with a yarn blocking part. The yarn blocking part, the yarn hooking piece and the yarn lifting needle are sequentially arranged along the vertical direction. One side of the yarn hooking piece is provided with a yarn clamping surface. The adjusting assembly is located between the yarn hooking piece and the winding tube. The adjusting assembly is suitable for driving the yarn hooking piece to move along the vertical direction, so as to switch the yarn clamping surface between a first state and a second state. In the first state, the yarn clamping surface and the inner side wall of the winding tube are matched to clamp the yarn. In the second state, the yarn clamping surface and the inner side wall of the winding tube are matched to release the yarn. By arranging the winding tube, the yarn hooking piece and the yarn lifting needle, the structure of the knotting assembly can be simplified, and the knotting assembly is convenient to assemble and use. By arranging the adjusting assembly, the adjusting difficulty of the clamping force is reduced, and the success rate of the yarn knotting process is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of textiles, in particular to a knotting mechanism and a warp tying machine. BACKGROUND

[0002] The warp tying machine used in the current textile industry starts to use a new knotting mechanism, which has an outer tube, a pulling component and a hook needle as main functional components. The pulling component is installed in the outer tube in an axial direction, and the hook needle is installed in the pulling component in an axial direction. A spring is arranged between the rear end of the hook needle and the pulling component. After the yarn is wound on the outer tube to form a loop (also known as a ring knot), the pulling component hooks the tail of the yarn and pulls it back, so that the tail of the yarn passes through the loop. At the same time, the hook needle is retracted together, and the tail of the yarn is clamped between the front end of the hook needle and the taper surface of the outer tube. After the loop on the outer tube is pushed out, the yarn can be pulled to complete the knotting. When the thickness of the yarn to be knotted is different, the retraction amount of the pulling component can be adjusted, and then the clamping force between the hook needle and the outer tube is controlled by the spring.

[0003] However, based on the mechanical structure, although the knotting scheme optimizes the problem that the clamping force of the tail of the yarn in other knotting mechanisms on the market cannot be adjusted, the clamping force between the hook needle and the outer tube is determined by the retraction amount of the hook needle and the retraction amount of the pulling component. This will increase the control accuracy requirement of the hook needle and the pulling component, and increase the difficulty of adjusting the clamping force. In addition, the pulling component also needs to be retracted according to the actual length of the tail of the yarn. If the knotting mechanism wants to make a double knot, a relatively long tail of the yarn needs to be reserved, which will increase the retraction amount of the pulling component, thereby increasing the clamping force of the knotting mechanism, and the yarn is easy to break when the yarn is pulled out, which will cause the knotting to fail. SUMMARY

[0004] The present application aims to at least solve one of the technical problems existing in the prior art. To this end, the present application provides a knotting mechanism which is simple in structure and convenient to control. The knotting mechanism can adjust the length of the tail of the yarn by controlling the retraction amount of the hooking piece without affecting the clamping force, thereby effectively improving the success rate of the knotting mechanism.

[0005] The present application also provides a knotting machine with the above knotting mechanism.

[0006] According to the knotting mechanism, the knotting assembly is simplified in structure and convenient to assemble and use, the adjusting assembly is provided, on one hand, the adjusting assembly only needs to control the hooking piece to adjust the clamping force, the control object is less and the precision requirement is low, and the adjusting difficulty of the clamping force can be effectively reduced, on the other hand, the adjusting assembly controls the hooking piece to move along the vertical direction, the clamping face is switched between the first state of clamping the yarn and the second state of releasing the yarn, at this time, the clamping force of the knotting mechanism is mainly related to the displacement amount of the hooking piece along the vertical direction, and is irrelevant to the retraction amount of the hooking piece along the axial direction of the winding tube, when the knotting mechanism controls the retraction amount of the hooking piece to adjust the length of the yarn tail, the clamping force is not affected, even if the yarn tail is long, the retraction amount of the hooking piece, the adjusting assembly can also adjust the clamping force to a proper size, the problem of broken yarn is avoided, and the success rate of the knotting process of the yarn is effectively improved.

[0007] According to the knotting mechanism, the knotting assembly is simplified in structure and convenient to assemble and use, the adjusting assembly is provided, on one hand, the adjusting assembly only needs to control the hooking piece to adjust the clamping force, the control object is less and the precision requirement is low, and the adjusting difficulty of the clamping force can be effectively reduced, on the other hand, the adjusting assembly controls the hooking piece to move along the vertical direction, the clamping face is switched between the first state of clamping the yarn and the second state of releasing the yarn, at this time, the clamping force of the knotting mechanism is mainly related to the displacement amount of the hooking piece along the vertical direction, and is irrelevant to the retraction amount of the hooking piece along the axial direction of the winding tube, when the knotting mechanism controls the retraction amount of the hooking piece to adjust the length of the yarn tail, the clamping force is not affected, even if the yarn tail is long, the retraction amount of the hooking piece, the adjusting assembly can also adjust the clamping force to a proper size, the problem of broken yarn is avoided, and the success rate of the knotting process of the yarn is effectively improved.

[0008] According to some embodiments of the present application, the adjusting assembly comprises a screw rod, a spring, a micro-motion adjuster and a visual detection piece, the micro-motion adjuster is located on the side of the hooking piece away from the yarn needle, the screw rod comprises a head and a rod body connected with the head, the micro-motion adjuster is provided with a pressing piece, the hooking piece is provided with a waist-shaped hole, the head and the hooking piece are in abutment, the rod body is arranged in the waist-shaped hole and is bolted with the pressing piece, the spring is arranged in the winding tube and is in abutment with the pressing piece, the micro-motion adjuster is used to drive the pressing piece to rotate to adjust the stress of the spring, the visual detection piece is used to detect the type of the yarn, and the visual detection piece and the micro-motion adjuster are electrically connected.

[0009] According to some embodiments of the present application, the winding tube comprises a tube body and a knotting head, the picking piece is arranged along the axial direction of the winding tube and penetrates the knotting head, the screw rod, the spring and the micro-motion regulator are respectively arranged in the knotting head, the knotting head is provided with a winding taper surface and a connecting part at two ends thereof, the winding taper surface gradually decreases in diameter in the direction away from the knotting head, the winding taper surface is provided with a winding circular surface at the end thereof away from the knotting head, the yarn blocking part is formed on the outer peripheral wall of the winding circular surface, and the connecting part and the tube body are detachably connected.

[0010] According to some embodiments of the present application, the yarn blocking part is provided with a first transition surface on one side close to the top end of the winding circular surface and a second transition surface on the other side, the first transition surface is in the shape of an arc with an opening facing upward, the second transition surface is in the shape of an arc protruding outward from the winding circular surface, and the first transition surface and the second transition surface are smoothly connected through a fillet coaxial with the winding circular surface.

[0011] According to some embodiments of the present application, the diameter of the winding circular surface is φ a , the diameter of the fillet of the yarn blocking part away from the winding circular surface is φ b , and the following condition is met: φ b ≤ φ a +n*d; wherein n is a coefficient of anti-dropping, and d is the diameter of the yarn.

[0012] According to some embodiments of the present application, the winding tube is provided with a sliding groove arranged along the axial direction of the winding tube, and the top yarn needle is slidingly arranged in the sliding groove.

[0013] According to some embodiments of the present application, the head is provided with a first positioning part, the tube body is provided with a second positioning part, and the first positioning part and the second positioning part are matched to limit the screw rod along the circumferential direction of the rod body.

[0014] According to some embodiments of the present application, the winding tube is provided with a receiving cavity, the receiving cavity is located on the side of the picking piece away from the yarn clamping surface, and the picking piece is moved to draw the yarn on the side of the picking piece away from the yarn clamping surface into the receiving cavity.

[0015] According to some embodiments of the present application, the winding tube is provided with a yarn clamping piece, the yarn clamping piece is in clamping cooperation with the winding tube and located between the yarn clamping surface and the inner side wall of the winding tube.

[0016] The wiring machine according to the second aspect of the embodiments of the present application comprises the knotting mechanism according to the above embodiments.

[0017] The wiring machine has at least the following beneficial effects: the knotting assembly structure is simplified, and the knotting assembly is convenient to assemble and use by arranging the winding tube, the yarn hooking piece and the yarn lifting needle; the adjustment difficulty of the clamping force is effectively reduced by adjusting the clamping force of the yarn hooking piece through the adjusting assembly; and the clamping force of the knotting mechanism is mainly related to the displacement amount of the yarn hooking piece in the vertical direction or the driving force of the adjusting assembly, and is irrelevant to the retraction amount of the yarn hooking piece along the axis of the winding tube, so that the clamping force is not affected when the knotting mechanism adjusts the length of the thread tail by controlling the retraction amount of the yarn hooking piece, the clamping force can be adjusted to an appropriate size by the adjusting assembly even if the thread tail is long, and the problem of broken yarn is avoided, and the success rate of the yarn knotting process is effectively improved.

[0018] Additional aspects and advantages of the application will be set forth in part in the description which follows, and in part will become apparent to those skilled in the art upon examination of the following and / or can be learned by practice of the application. BRIEF DESCRIPTION OF DRAWINGS

[0019] The application will be further described below in conjunction with the drawings and embodiments, wherein:

[0020] Figure 1 is a structure schematic view of the knotting mechanism of an embodiment of the application;

[0021] Figure 2 is a loop forming schematic view of the knotting mechanism of an embodiment of the application;

[0022] Figure 3 is Figure 1 is a sectional view of A in FIG. 8;

[0023] Figure 4 is a sectional view of the knotting head of an embodiment of the application;

[0024] Figure 5 is a thread tail clamping schematic view of the knotting mechanism of an embodiment of the application;

[0025] Figure 6 is Figure 4 is a sectional view of B in FIG. 9;

[0026] Figure 7 is a double knot forming loop schematic view of the knotting mechanism of an embodiment of the application;

[0027] Figure 8 is a structure schematic view of the adjusting assembly of an embodiment of the application;

[0028] Figure 9 is a loop forming schematic view of the knotting mechanism of an embodiment of the application;

[0029] Figure 10is a bottom view of the adjusting assembly of one embodiment of the present application.

[0030] Reference signs:

[0031] knotting assembly 1000;

[0032] yarn winding tube 100; sliding groove 101; tube body 110; insertion hole 1101; through hole 1102; screw 111; knotting head 120; guide groove 1201; accommodating cavity 1202; first mounting hole 1203; second mounting hole 1204; third mounting hole 1205; yarn winding conical surface 121; yarn winding circular surface 1211; yarn blocking part 1212; first transition surface 1213; second transition surface 1214; connecting part 122; second positioning part 123; yarn clamping sheet 130;

[0033] yarn hooking sheet 200; hooking groove 201; waist-shaped hole 202; yarn clamping surface 210; guide part 220;

[0034] yarn lifting needle 300;

[0035] adjusting assembly 2000;

[0036] screw rod 400; head 410; first positioning part 411; rod body 420;

[0037] spring 500;

[0038] micro-adjusting device 600. DETAILED DESCRIPTION

[0039] The embodiments of the present application are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar notations represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary only, for the purpose of explaining the present application, and should not be understood as a limitation of the present application.

[0040] In the description of the present application, it should be understood that the orientation description, such as the orientation or position relationship indicated by up, down, front, back, left, right, etc. is based on the orientation or position relationship shown in the drawings, and is only for the purpose of describing the present application and simplifying the description, and does not indicate or imply that the indicated mechanism or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be understood as a limitation of the present application.

[0041] In the description of the present application, the meaning of one or more is one or more, the meaning of multiple is more than two, greater than, less than, more than, etc. are understood as not including the number, above, below, within, etc. are understood as including the number. If the first, second is described, it is only for the purpose of distinguishing technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features or implicitly indicating the order of the indicated technical features.

[0042] In the description of the present application, unless otherwise explicitly limited, the words such as setting, installing, connecting, etc. should be broadly understood, and those skilled in the art can reasonably determine the specific meaning of the above words in the present application in combination with the specific content of the technical solution.

[0043] Referring to Figure 1 The knot tying mechanism of one embodiment of the present application includes a knot tying assembly 1000 and an adjusting assembly 2000. The knot tying assembly 1000 includes a yarn winding tube 100, a yarn hooking piece 200, and a yarn lifting needle 300. The yarn winding tube 100 mainly consists of a tube body 110 and a knot tying head 120. The knot tying head 120 is tubular and matches the shape of the tube body 110. The knot tying head 120 is provided with a yarn winding cone surface 121 and a connecting part 122 at both ends, respectively. The yarn winding cone surface 121 and the knot tying head 120 are smoothly connected through a rounded corner. The knot tying head 120 is connected to the tube body 110 through the connecting part 122. The tube body 110 is used to install the knot tying head 120 on a wiring machine. Along the axial direction of the knot tying head 120, the outer diameter of the yarn winding cone surface 121 gradually decreases in the direction away from the knot tying head 120. The yarn winding cone surface 121 extends in the axial direction of the knot tying head 120 at the same diameter to form a yarn winding circular surface 1211 at the end away from the knot tying head 120. The knot tying head 120 is provided with a guide groove 1201. The guide groove 1201 penetrates the knot tying head 120 along the axial direction of the knot tying head 120. The yarn hooking piece 200 is slidingly assembled in the guide groove 1201 to ensure the stability of the movement of the yarn hooking piece 200. The yarn hooking piece 200 and the guide groove 1201 can be approximately considered as a clearance fit. Part of the outer peripheral wall of the yarn winding circular surface 1211 protrudes outward along the radial direction of the yarn winding circular surface 1211 to form a yarn blocking part 1212. The yarn blocking part 1212 protrudes upward and obliquely towards the yarn hooking piece 200. The yarn lifting needle 300 is located on the side of the yarn hooking piece 200 away from the yarn blocking part 1212. The yarn lifting needle 300 is slidingly connected to the knot tying head 120 and the tube body 110 along the axial direction of the knot tying head 120. At this time, the yarn blocking part 1212, the yarn hooking piece 200, and the yarn lifting needle 300 are sequentially arranged in the vertical direction.

[0044] It can be understood that when the outer clamp wraps the yarn around the peripheral wall of the knotting head 120, the tension of the outer clamp, under the action of the winding cone surface 121, causes the loop to fall accurately on the winding circular surface 1211, and the yarn is blocked by the loop blocking part 1212 to prevent the loop from falling off the winding circular surface 1211, so that the yarn is wrapped to form a stable loop, and the size of the loop formed each time is consistent and the position is accurate, which facilitates the user to control the length of the tail, and the knotting is easier to be separated from the knotting head, ensuring the consistency of the finished product of the knotting mechanism; at the same time, the knotting assembly 1000 is mainly composed of the winding pipe 100, the yarn hooking piece 200 and the yarn lifting needle 300, the winding pipe 100, the yarn hooking piece 200 and the yarn lifting needle 300 are simple in structure and convenient to assemble, which can greatly simplify the structure of the knotting mechanism and facilitate the user to assemble and use.

[0045] Referring to Figure 2 It is necessary to supplement that the yarn hooking piece 200 is provided with a hook groove 201, the hook groove 201 penetrates the yarn hooking piece 200 in the vertical direction, the hook groove 201 is provided with an opening, and the opening of the hook groove 201 is provided with a guide part 220 for guiding the yarn into the hook groove 201, the guide part 220 is an arc surface structure arranged at the opening, and the opening of the hook groove 201 is located on the side of the yarn hooking piece 200 away from the loop blocking part 1212 in the left-right direction, so that after the yarn forms a loop on the winding circular surface 1211, the tail of the loop at the end of the loop can pass through the opening of the hook groove 201 into the hook groove 201 from the side of the loop blocking part 1212 close to the top end of the winding circular surface 1211, that is, above the yarn hooking piece 200, thereby effectively improving the structural rationality of the knotting mechanism and the smoothness of the operation.

[0046] In addition, the specific position of the loop blocking part 1212 is mainly determined by the yarn arranging mechanism for pulling the yarn to form a knot, when the yarn arranging mechanism is located on the left side of the knotting mechanism, the loop blocking part 1212 is located above the left side of the yarn hooking piece 200, and when the yarn arranging mechanism is located on the right side of the knotting mechanism, the loop blocking part 1212 is located above the right side of the yarn hooking piece 200, thereby avoiding subsequent interference of the loop blocking part 1212 with the yarn arranging mechanism for pulling the yarn. Here, it is particularly pointed out that this will not be described again.

[0047] Referring to Figure 3 and Figure 4 It can be understood that the connecting part 122 and the pipe body 110 are detachably connected, specifically, the connecting part 122 is circular for easy plugging or polygonal for easy positioning, the pipe body 110 is provided with a plug hole 1101 and a through hole 1102, the plug hole 1101 and the connecting part 122 are matched in shape and arranged along the axial direction of the pipe body 110, the through hole 1102 is located on one side of the plug hole 1101 and communicates with the plug hole 1101, the connecting part 122 and the plug hole 1101 are inserted and matched, the yarn hooking piece 200 in the guide groove 1201 can freely slide in the plug hole 1101, and the pipe body 110 is connected with a screw 111, the screw 111 is arranged in the through hole 1102 and is bolted with the connecting part 122.

[0048] When the user assembles the yarn winding tube 100, the connecting portion 122 can be inserted into the through hole 1102 first, and the knot head 120 is preliminarily positioned on the tube body 110, and then the knot head 120 and the tube body 110 are fixedly connected through the screw 111, so that the yarn winding tube 100 is assembled. By providing the insertion hole 1101 and the screw 111, the structure of the yarn winding tube 100 can be further simplified, the processing difficulty and maintenance cost of the yarn winding tube 100 can be greatly reduced, and the assembly convenience of the yarn winding tube 100 can be improved. At the same time, the modular degree of the knotting mechanism can be improved, and different components such as the knot head 120 can be quickly maintained and replaced by the user, so that the most suitable knot head 120 can be selected according to the yarn linear specification matching, and the problem that the knot head 120 of the wire connecting machine on the market is only used for general linear type and the knotting effect of non-general linear type is poor or even cannot be knotted is solved.

[0049] Referring to FIGS. 1 to 4, Figure 4 and Figure 5 It can be understood that the upper side or the lower side of the yarn hooking piece 200 is provided with the yarn clamping surface 210, the yarn clamping surface 210 is located at the front end of the hook groove 201, the yarn hooking piece 200 is moved to make the yarn clamping surface 210 retract into the guide groove 1201 of the yarn winding tube 100, so that the yarn hooking piece 200 pulls the yarn through the hook groove 201 into the space between the yarn clamping surface 210 and the inner side wall of the yarn winding tube 100 (i.e., the inner side wall opposite to the yarn clamping surface 210); the yarn winding tube 100 is provided with a containing cavity 1202, the containing cavity 1202 is located on the side of the yarn hooking piece 200 away from the yarn clamping surface 210 and is in communication with the guide groove 1201, and the yarn hooking piece 200 is moved to pull the yarn on the side of the yarn hooking piece 200 away from the yarn clamping surface 210 into the containing cavity 1202.

[0050] When the yarn clamping surface 210 is arranged on the upper side of the yarn hooking piece 200, that is, the yarn clamping surface 210 is part of the top end surface of the yarn hooking piece 200, the containing cavity 1202 is located on the lower side of the guide groove 1201 and is in communication with the guide groove 1201, and when the knotting mechanism works, with the yarn hooking piece 200 retracting relative to the knot head 120, part of the thread tail in the hook groove 201 is separated from the hook groove 201 and enters the space between the yarn clamping surface 210 on the upper side of the yarn hooking piece 200 and the inner side wall of the yarn winding tube 100, and the thread tail passing through the hook groove 201 enters the containing cavity 1202 on the lower side of the guide groove 1201; when the yarn clamping surface 210 is arranged on the lower side of the yarn hooking piece 200, that is, the yarn clamping surface 210 is part of the bottom end surface of the yarn hooking piece 200, the containing cavity 1202 is located on the upper side of the guide groove 1201 and is in communication with the guide groove 1201, and when the knotting mechanism works, with the yarn hooking piece 200 retracting relative to the knot head 120, part of the thread tail in the hook groove 201 is separated from the hook groove 201 and enters the containing cavity 1202 on the upper side of the guide groove 1201; the thread tail passing through the hook groove 201 enters the space between the yarn clamping surface 210 on the lower side of the yarn hooking piece 200 and the inner side wall of the yarn winding tube 100. Hereinafter, the yarn clamping surface 210 arranged on the upper side of the yarn hooking piece 200 is taken as an example for description, and it is particularly stated here to avoid misunderstanding.

[0051] By setting the accommodating cavity 1202, on the one hand, since the yarn winding surface 1211 is located in the front section of the knot head 120, and the accommodating cavity 1202 is located inside the knot head 120, the accommodating cavity 1202 accommodates the thread tail, so that when the top yarn needle 300 ejects the loop, the thread tail can pass through the loop, avoiding the problem that the thread tail remains on the front side of the loop, and the loop cannot be smoothly knotted when the yarn arranging mechanism pulls the yarn, ensuring that the knot is formed smoothly; on the other hand, by setting the accommodating cavity 1202, the top end surface and the bottom end surface of the yarn hooking piece 200 can be avoided to be matched with the inner side wall of the knot head 120 to clamp the yarn, so that the yarn is clamped on both sides of the yarn hooking piece 200, and the yarn is blocked and locked when the yarn arranging mechanism pulls the yarn, further improving the structural rationality of the knot head 120.

[0052] Referring to Figure 5 and Figure 6 It can be understood that the yarn winding tube 100 is provided with a sliding groove 101, the sliding groove 101 is composed of two groove bodies respectively arranged at the bottom end of the knot head 120 and the bottom end of the tube body 110, the sliding groove 101 and the top yarn needle 300 are matched in shape, the sliding groove 101 is arranged along the axial direction of the yarn winding tube 100, and the top yarn needle 300 is slidingly assembled in the sliding groove 101. Specifically, the sliding groove 101 can be an open groove body arranged at the bottom end of the yarn winding tube 100, at this time, the upper half of the top yarn needle 300 is slidingly assembled in the open sliding groove 101; the sliding groove 101 can also be a closed groove body penetrating through the side wall of the yarn winding tube 100 along the axial direction of the yarn winding tube 100, at this time, the top yarn needle 300 is slidingly assembled in the sliding groove 101, that is, the top yarn needle 300 penetrates through the yarn winding tube 100 along the axial direction of the yarn winding tube 100.

[0053] By setting the sliding groove 101, the positioning and installation of the top yarn needle 300 can be facilitated, further improving the assembly convenience of the knotting mechanism, and at the same time, the structural compactness between the top yarn needle 300 and the yarn winding tube 100 can be improved, and the movement stability of the top yarn needle 300 can be improved. In addition, a guide rail can be arranged at the top end of the yarn winding tube 100, and the top yarn needle 300 is slidingly assembled on the guide rail, so as to further improve the movement stability of the top yarn needle 300.

[0054] Referring to Figure 6As shown, it can be understood that the yarn blocking part 1212 is provided with a first transition surface 1213 on one side close to the top end of the winding surface 1211 and a second transition surface 1214 on the other side. The first transition surface 1213 is in the shape of an arc with the opening facing upwards. Since the yarn blocking part 1212 is inclined upwards, the opening of the first transition surface 1213 also inclines upwards. The first transition surface 1213 is in the shape of an arc protruding towards the outside of the winding surface 1211. The first transition surface 1213 and the second transition surface 1214 are smoothly transitioned through the rounded corner coaxial with the winding surface 1211. At this time, the yarn blocking part 1212 is in the shape of a "mango" protruding radially along the winding surface 1211.

[0055] The first transition surface 1213 is located on one side of the yarn blocking part 1212 close to the top end of the winding surface 1211. After the yarn is wound on the winding surface 1211 to form a loop, the tail of the yarn will be wound into the hook groove 201 from one side of the first transition surface 1213. Then the hooking piece 200 hooks the tail of the yarn into the space between the clamping surface 210 and the inner wall of the knot head 120 through the hook groove 201, so as to clamp and fix the tail of the yarn. At this time, the loop is fixed and formed around the winding surface 1211, and the bottom end of the loop is located in front of the top needle 300. Then the top needle 300 moves to push out the loop. The second transition surface 1214 is arranged in the shape of an arc protruding towards the outside of the winding surface 1211, that is, the arc-shaped second transition surface 1214 is convex on one side of the yarn blocking part 1212, so as to increase the projection area of the second transition surface 1214 on the front end surface of the knot head 120. When the hooking piece 200 hooks the tail of the yarn, the second transition surface 1214 can fully block the yarn, so as to enhance the yarn blocking effect of the yarn blocking part 1212. The first transition surface 1213 is arranged in the shape of an arc with the opening facing upwards, that is, the arc-shaped first transition surface 1213 is concave on one side of the yarn blocking part 1212, so as to avoid that the protruding second transition surface 1214 or the flat second transition surface 1214 guides the yarn on the yarn blocking part 1212 to move when the top needle 300 pushes the yarn, which causes the loop to be separated from the winding surface 1211 in advance, resulting in poor knotting effect, knotting failure and other problems, so as to ensure the loop to be knotted smoothly and effectively improve the structural rationality of the yarn blocking part 1212.

[0056] Referring to Figure 6 and Figure 7 As shown, when the yarn needs to be knotted into a double knot, the outer clamp controls the yarn to be wound around the winding surface 1211 for one turn to reach the position of the yarn blocking part 1212 and form a loop. Then the yarn is wound around the outer peripheral wall of the "mango-shaped" yarn blocking part 1212 for one turn to form a small loop around the yarn blocking part 1212. At this time, the concave first transition surface 1213 and the convex second transition surface 1214 cooperate to support the second loop, so as to maintain the stability of the second loop, thereby ensuring the stable formation of the subsequent double knot.

[0057] Referring to Figure 6As shown, it can be understood that the diameter of the yarn winding circle 1211 is φa, the diameter of the "mango tip" of the "mango-shaped" yarn blocking part 1212 away from one end of the yarn winding circle 1211 is φb, and φb≤φa+n*d is satisfied; wherein n is the anti-drop coefficient, d is the yarn diameter, and the anti-drop coefficient is mainly positively correlated with the yarn diameter, that is, the larger the yarn diameter d, the larger the anti-drop coefficient n; the smaller the yarn diameter d, the smaller the anti-drop coefficient n.

[0058] Limiting the maximum diameter φb of the "mango tip" to be less than φa+n*d can ensure that the yarn blocking part 1212 protrudes along the yarn winding circle 1211 in the radial direction for a sufficient length to block the yarn and prevent the yarn from detaching from the yarn winding circle 1211, while avoiding the yarn blocking part 1212 being too protruding, which can cause material waste and assembly difficulty, and further improving the structural rationality of the yarn blocking part 1212.

[0059] It should be noted that there is an angle α between the "mango tip" and the vertical direction. Since the "mango tip" is the rounded corner of the yarn blocking part 1212 away from one end of the yarn winding circle 1211, it is obvious that the size of the angle α can approximately represent the inclination of the yarn blocking part 1212. The value of the angle α is related to the position of the yarn arranging mechanism, for example, the angle between the yarn arranging mechanism and the horizontal plane is about 52° when the yarn arranging mechanism is located at the upper left corner of the knotting mechanism. Therefore, the yarn blocking part 1212 is located at the upper left corner of the yarn hook 200 and the angle α is about 38°, so as to ensure that the yarn arranging mechanism can smoothly pull the yarn and improve the coordination between the knotting mechanism and the yarn arranging mechanism.

[0060] In addition, there is an angle β between the first transition surface 1213 and the "mango tip", which satisfies 20°≤β≤25°, and there is an angle γ between the second transition surface 1214 and the "mango tip", which satisfies 50°≤γ≤55°. Obviously, the size of the angle β can approximately represent the size of the space occupied by the first transition surface 1213 on the side of the yarn winding circle 1211, and the size of the angle γ can approximately represent the size of the space occupied by the second transition surface 1214 on the side of the yarn winding circle 1211. Limiting β to be between 20° and 25° can avoid the problem of the first transition surface 1213 occupying too small space to support the second loop, thereby ensuring the success rate of the knotting mechanism to make double knots. On the other hand, it can avoid the problem of the first transition surface 1213 occupying too large space and the second transition surface 1214 occupying the top end of the yarn winding circle 1211, thereby preventing the yarn from falling from above the yarn hook 200 into the hook groove 201 and ensuring the smoothness of the operation of the knotting mechanism. Limiting γ to be between 50° and 55° can ensure that the second transition surface 1214 has enough volume to block the yarn, thereby ensuring the yarn blocking effect of the yarn blocking part 1212, and on the other hand, it can avoid the problem of the second transition surface 1214 having too large volume to affect the winding of the second loop, thereby improving the success rate of the knotting mechanism to make double knots.

[0061] Referring to Figure 2 and Figure 8 It can be understood that the yarn pipe 100 is provided with a clamping piece 130, the clamping piece 130 and the yarn pipe 100 are clamped and matched, that is, the clamping piece 130 is clamped in the guide groove 1201, and the clamping piece 130 is located between the clamping surface 210 and the inner side wall of the yarn pipe 100. When the yarn hooking piece 200 hooks the yarn and clamps the tail through the clamping surface 210, the clamped yarn is located between the clamping surface 210 and the clamping piece 130. By arranging the clamping piece 130, the clamping piece 130 and the clamping surface 210 clamp the yarn, so that the clamping piece 130 replaces the original inner side wall of the knot head 120 and the clamping surface 210 and the yarn to rub, thereby reducing the wear of the knot head 120, protecting the more complex knot head 120, and the user can replace the new clamping piece 130 at any time to ensure the roughness of the clamping piece 130, effectively reducing the maintenance cost of the knot mechanism in the later period, and prolonging the service life of the knot mechanism.

[0062] Referring to Figure 3 , Figure 4 and Figure 8 It can be understood that the adjusting assembly 2000 is located between the yarn hooking piece 200 and the yarn pipe 100, the adjusting assembly 2000 includes a screw rod 400, a spring 500, a micro-adjusting device 600 and a visual detection piece, the screw rod 400, the spring 500 and the micro-adjusting device 600 are respectively installed on the knot head 120. Specifically, the knot head 120 is provided with a first mounting hole 1203, a second mounting hole 1204 and a third mounting hole 1205, the first mounting hole 1203, the second mounting hole 1204, the guide groove 1201 and the third mounting hole 1205 are sequentially arranged along the vertical direction, the first mounting hole 1203 and the second mounting hole 1204 are coaxial and communicate with each other, the micro-adjusting device 600 is located on the side of the yarn hooking piece 200 away from the top yarn needle 300, the micro-adjusting device 600 is provided with a pressing piece, the micro-adjusting device 600 is a micro voice coil motor, the pressing piece is an annular body provided with an internal thread, the pressing piece and the output end of the voice coil motor are in transmission connection, the pressing piece is installed in the first mounting hole 1203 and is in clearance fit with the first mounting hole 1203, the screw rod 400 includes a head 410 and a rod body 420 connected with the head 410, the yarn hooking piece 200 is provided with a waist-shaped hole 202, the head 410 is installed in the third mounting hole 1205, the head 410 abuts against the bottom end surface of the yarn hooking piece 200, the rod body 420 is upwardly arranged and penetrates through the waist-shaped hole 202 and is bolted with the pressing piece (the clamping piece 130 is also provided with a hole body for the rod body 420 to penetrate through), the spring 500 is installed in the second mounting hole 1204 and is sleeved on the rod body 420, the two ends of the spring 500 respectively abut against the bottom wall of the second mounting hole 1204 and the bottom end surface of the pressing piece, the visual detection piece is installed on one side of the knot mechanism, the detection end of the visual detection piece faces the yarn arranging mechanism to detect the type of yarn, and the visual detection piece and the micro-adjusting device 600 are electrically connected through a controller.

[0063] In the initial state, the pressing member and the rod 420 are threadedly engaged, the head 410 at the bottom end of the rod 420 abuts against the bottom end surface of the yarn hooking piece 200, and under the elastic force of the spring 500, the rod 420 pulls the head 410 to make the yarn hooking surface 210 of the yarn hooking piece 200 abut against the inner side wall of the knotting head 120, thereby ensuring the yarn clamping effect of the knotting head 120. When the knotting mechanism starts to knot the yarn, the visual detection member detects the type of the yarn and the knotting state in real time, and according to the detected type of the yarn and / or the knotting state, sends an adjusting signal to the controller, and the controller controls the micro-adjusting device 600 to start according to the adjusting signal, and the micro-adjusting device 600 drives the pressing member to rotate to make the pressing member ascend or descend relative to the rod 420, thereby changing the stress of the spring 500, and simultaneously driving the yarn hooking piece 200 to move along the vertical direction, to automatically adjust the clamping pressure between the yarn hooking surface 210 and the clamping piece 130.

[0064] Referring to Figure 2 and Figure 5 When the visual detection member detects that the yarn wound on the yarn winding surface 1211 is a yarn with good toughness, and / or detects that the yarn hooking piece 200 is hooking the tail of the loop to prepare to clamp the tail of the loop, the visual detection member sends a clamping adjusting signal to the controller, and the controller controls the micro-adjusting device 600 to start according to the clamping adjusting signal, and the micro-adjusting device 600 drives the pressing member to rotate to make the pressing member descend relative to the rod 420, thereby increasing the stress of the spring 500, and the increased stress of the spring 500 acts on the pressing member, and the pressing member pulls the clamping piece 130 to move upward and press the clamping piece 130 through the screw rod 400, so that the yarn hooking surface 210 is switched to the first state of clamping the yarn in cooperation with the inner side wall of the yarn winding tube 100.

[0065] It should be noted that when the yarn hooking piece 200 and the clamping piece 130 abut against each other, i.e., the yarn hooking piece 200 is already in the first state, the micro-adjusting device 600 can still control the pressing member to descend to increase the stress of the spring 500, at this time, the position of the yarn hooking piece 200 does not change, but the clamping force between the yarn hooking piece 200 and the clamping piece 130 increases, thereby enhancing the clamping effect of the knotting mechanism.

[0066] Referring to Figure 9As shown, when the visual detection member detects that the yarn wound on the winding surface 1211 is a brittle yarn, and / or when the visual detection member detects that the yarn loop tail is being pulled by the yarn arranging mechanism to form a knot, the visual detection member sends a loosening adjustment signal to the controller, the controller controls the micro-adjusting device 600 to start according to the loosening adjustment signal, the micro-adjusting device 600 drives the pressing member to rotate to make the pressing member ascend relative to the rod body 420, thereby reducing the stress of the spring 500, and the reduced stress of the spring 500 and the gravity of the yarn hooking piece 200 are offset, under the action of gravity, the pressing member and the yarn hooking piece 200 descend (when the mass of the yarn hooking piece 200 is small, the position of the yarn hooking piece 200 does not change, but the clamping force between the yarn hooking piece 200 and the yarn clamping piece 130 decreases), and the clamping surface 210 is switched to the second state of being separated from the inner side wall of the winding tube 100 to loosen the yarn.

[0067] By arranging the adjusting assembly 2000 with the visual detection member, on the one hand, when the knotting mechanism is pulling the knot to tighten the knot, the adjusting assembly 2000 can automatically adjust the clamping force of the knotting mechanism to an appropriate size to ensure that the knot is firm, and after the knot is formed firmly, the clamping force can be automatically released or reduced to ensure that the yarn tail can easily slide out of the clamping surface when the yarn is arranged and pulled, so that the working stability and smoothness of the knotting mechanism are greatly improved, and on the other hand, the knotting mechanism can automatically adjust the clamping force according to different types of yarns to avoid problems such as broken yarns or failed knotting, thereby effectively improving the knotting success rate of the knotting mechanism.

[0068] It should be noted that the micro-adjusting device 600 and the pressing member can be connected through a gear and rack, a gear set, a crank connecting rod, or a cam eccentric block, so as to convert the torque of the micro-adjusting device 600 into the torque of the pressing member, and the transmission mechanism between the micro-adjusting device 600 and the pressing member is not limited here, as long as the torque of the micro-adjusting device 600 can be stably transmitted and the micro-adjusting device 600 can be installed in the first mounting hole 1203.

[0069] Referring to Figure 4 and Figure 10 As shown, it can be understood that the head 410 is provided with a first positioning part 411, and the tube body 110 is provided with a second positioning part 123, and the first positioning part 411 and the second positioning part 123 cooperate to limit the screw rod 400 along the circumference of the rod body 420. Specifically, the first limiting part can be a vertical plane arranged on the head 410, that is, the first positioning part 411 is a flat position arranged on the end of the screw rod 400, at this time, the second positioning part 123 is an inner side wall in the third mounting hole 1205 which is parallel to the first limiting part, and the second positioning part 123 limits the rotation of the first limiting part 411 to limit the rotation of the screw rod 400, or the first limiting part can be a protruding structure arranged on the head 410 and protruding outward along the radial direction of the rod body 420, at this time, the second positioning part 123 is a hole and groove structure matched with the protruding first limiting part.

[0070] By setting the first positioning part 411 and the second positioning part 123, the first positioning part 411 and the second positioning part 123 cooperate to limit the screw rod 400 along the circumference of the rod body 420, so that when the micro-motion regulator 600 drives the pressing piece to rotate, the pressing piece is prevented from driving the rod body 420 to rotate, thereby eliminating the deviation and structural looseness caused by the rotation of the screw rod 400, effectively improving the accuracy of the adjusting assembly 2000, improving the structural stability of the knot head 120, and the user can quickly position and install the screw rod 400 through the first positioning part 411 and the second positioning part 123, thereby improving the assembly convenience of the adjusting assembly 2000.

[0071] It can be understood that by setting the yarn winding tube 100, the yarn hooking piece 200 and the yarn lifting needle 300, the structure of the knotting assembly 1000 can be simplified, and the knotting assembly 1000 is convenient to assemble and use; by setting the adjusting assembly 2000, on the one hand, the adjusting assembly 2000 only needs to control the yarn hooking piece 200 to adjust the clamping force, the control object is less and the accuracy requirement is low, and the adjusting difficulty of the clamping force can be effectively reduced; on the other hand, the adjusting assembly 2000 adjusts the stress of the spring 500 by controlling the pressing piece to move along the vertical direction, so that the clamping surface 210 is switched between the first state of clamping the yarn and the second state of releasing the yarn and the clamping force between the clamping surface 210 and the clamping piece 130 is accurately controlled, at this time, the clamping force of the knotting mechanism is mainly related to the displacement amount of the yarn hooking piece 200 in the vertical direction, when the yarn hooking piece 200 has no displacement, the clamping force is mainly related to the displacement amount of the pressing piece in the vertical direction, and the displacement amount of the pressing piece in the vertical direction is related to the output torque of the micro-motion regulator 600; and the displacement amounts of the yarn hooking piece 200 and the pressing piece in the vertical direction are all irrelevant to the retraction amount of the yarn hooking piece 200 along the axis of the yarn winding tube 100, obviously, when the knotting mechanism adjusts the length of the thread tail by controlling the retraction amount of the yarn hooking piece 200, the clamping force will not be affected, even if the thread tail is relatively long, the adjusting assembly 2000 can also adjust the clamping force to an appropriate size, avoiding the problem of broken yarn, and effectively improving the success rate of the yarn knotting process.

[0072] The wiring machine of one embodiment of the application comprises a knotting mechanism, a yarn arranging mechanism and a chuck of the above embodiments. The yarn arranging mechanism is located on one side of the knotting mechanism, and the yarn arranging mechanism is used to pull the yarn after fixing the thread tail of the knotting mechanism, so that the knot head is formed. The chuck is arranged around the knotting mechanism, and the chuck is used to clamp the thread tail and drive the yarn to wind around the yarn winding surface 1211 to form a first loop, or drive the yarn to wind around the yarn blocking part 1212 to form a second loop. At the same time, the chuck clamps the thread tail to pass through the hooking groove 201 after the yarn forms a loop.

[0073] Since the connecting machine adopts all the technical solutions of the knotting mechanism of the above-mentioned embodiments, at least has all the beneficial effects brought by the technical solutions of the above-mentioned embodiments, which will not be repeated here.

[0074] The embodiments of the application are described in detail above with reference to the drawings, but the application is not limited to the above-mentioned embodiments, and various changes can be made within the knowledge of those skilled in the art without departing from the purpose of the application.

Claims

1. A knotter mechanism characterized by, The application relates to a knotting assembly, which comprises a winding tube, a yarn hooking sheet and a yarn lifting needle, the yarn hooking sheet and the yarn lifting needle are respectively connected to the winding tube in axial sliding mode, the winding tube is provided with a yarn blocking part, the yarn blocking part, the yarn hooking sheet and the yarn lifting needle are sequentially arranged in a vertical direction, the yarn blocking part is arranged in a protruding mode in an obliquely upper direction of the yarn hooking sheet along a radial direction of the winding tube, one side of the yarn hooking sheet is provided with a yarn clamping surface, the yarn hooking sheet is moved to retract the yarn clamping surface into the winding tube and to pull yarns into a space between the yarn clamping surface and an inner side wall of the winding tube. An adjusting assembly is arranged between the yarn hooking sheet and the winding tube, the adjusting assembly is suitable for driving the yarn hooking sheet to move in the vertical direction to switch the yarn clamping surface between a first state and a second state, the adjusting assembly comprises a screw rod, a spring, a micro-motion adjusting device and a visual detection element, the micro-motion adjusting device is arranged on a side of the yarn hooking sheet which is away from the yarn lifting needle, the screw rod comprises a head and a rod body which is connected to the head, the micro-motion adjusting device is provided with a pressing element which is an annular body provided with an internal thread, the pressing element and an output end of the micro-motion adjusting device are in transmission connection, the yarn hooking sheet is provided with a waist-shaped hole, the head and a bottom end surface of the yarn hooking sheet are in abutment, the rod body is arranged in the waist-shaped hole and is in bolt connection with the pressing element, the spring is arranged in the winding tube and is sleeved on the rod body and in abutment with a bottom end surface of the pressing element, the micro-motion adjusting device is used for driving the pressing element to rotate to adjust stress of the spring, the visual detection element is used for detecting a yarn type, the visual detection element and the micro-motion adjusting device are in electrical connection. The first state is that the yarn clamping surface and the inner side wall of the winding tube are matched to clamp yarns, and the second state is that the yarn clamping surface and the inner side wall of the winding tube are matched to release yarns. The winding tube comprises a tube body and a knotting head, the yarn hooking sheet is arranged in the knotting head in the axial direction of the winding tube, the screw rod, the spring and the micro-motion adjusting device are respectively arranged in the knotting head, two ends of the knotting head are respectively provided with a winding taper surface and a connecting part, the winding taper surface is gradually reduced in outer diameter in a direction away from the knotting head, an end of the winding taper surface which is away from the knotting head is provided with a winding circular surface, the yarn blocking part is formed on an outer peripheral wall of the winding circular surface, and the connecting part and the tube body are detachably connected.

2. A knotter mechanism according to claim 1, wherein, The yarn blocking part is provided with a first transition surface on one side close to a top end of the winding circular surface and a second transition surface on the other side, the first transition surface is in an arc shape with an opening facing upward, the second transition surface is in an arc shape which protrudes outwardly towards the outside of the winding circular surface, and the first transition surface and the second transition surface are smoothly connected through a round corner which is coaxial with the winding circular surface.

3. A knotter mechanism according to claim 2, wherein, The winding tube is provided with a sliding groove, the sliding groove is arranged in the axial direction of the winding tube, and the yarn lifting needle is slidably arranged in the sliding groove.

4. A knotter mechanism according to claim 3, wherein, The diameter of the yarn winding circle is φ a , the diameter of the fillet of the yarn stopping part away from one end of the yarn winding circle is φ b , and the following is satisfied: φ b ≤ φ a +n*d; wherein n is a yarn dropping prevention coefficient, and d is a yarn diameter.

5. A knotter mechanism according to claim 1 or 2, wherein The head is provided with a first positioning part, the tube body is provided with a second positioning part, and the first positioning part and the second positioning part are matched to limit the screw rod in a circumferential direction of the rod body.

6. A knotter mechanism according to claim 2, wherein, ​ 7. A knotter mechanism according to claim 1 wherein, The winding tube is provided with a containing cavity, which is located on the side of the picking piece away from the yarn clamping surface, and the picking piece is moved to draw the yarn on the side of the picking piece away from the yarn clamping surface into the containing cavity.

8. A knotter mechanism according to claim 7, wherein, The winding tube is provided with a yarn clamping piece, which is in clamping connection with the winding tube and located between the yarn clamping surface and the inner side wall of the winding tube.

9. A warp tying machine characterized by, The knotting mechanism comprises the knotting mechanism according to any one of claims 1 to 8.

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