Rope knotting mechanism

Abstract

The utility model relates to the technical field of sanitary napkin production equipment, in particular to a rope knotting mechanism which comprises a supporting plate, a fixing shaft, a first transmission gear, a second transmission gear, a first clamping piece, a second clamping piece, a third clamping piece and a drag hook rod. A baffle is rotationally arranged on the supporting plate; a transmission part is arranged on the supporting plate in a sliding manner; the first transmission gear is in meshed connection with the second transmission gear, the end of the transmission piece movably abuts against the first transmission gear, and the baffle movably abuts against the third clamping piece. Under the assistance of an external power mechanism, the rope can be wound by 360 degrees to form a circle, and the tail end of the rope can penetrate through the rope circle to complete the complete knotting action, so that manpower resources are saved, and the production efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of sanitary napkin production equipment, and more specifically, it relates to a rope knotting mechanism. Background Art

[0002] Rope knotting is a function widely used in life, and is commonly used in product bundling, hoisting and other occasions. At present, a knotted rope is applied to a female disposable sanitary product, tampon. The knotting work is usually completed manually, with low efficiency.

[0003] The working principle of rope knotting is as follows: First, one end of the rope is wound 360 degrees at a position 30 mm away from the end to form a loop. Then, with the intersection point of the ropes as the fixed center, the remaining end of the rope is offset outward from the intersection point, and then the end approaches the center of the rope loop and passes through the rope loop to complete the rope knotting action. The steps are as Figure 1 shown.

[0004] At present, rope knotting mechanisms have also been developed in China. For example, Chinese Patent CN209759725U discloses a rope knotting device, in which the action of winding the rope 360 degrees to form a loop needs to be completed manually (see paragraph

[0032] of its specification); Chinese Patent CN216237579U discloses an automatic knotting mechanism for elastic ropes, which needs to rely on an external mechanism to pass the end of the rope through the rope loop to complete the knotting action (see paragraph

[0026] of its specification). That is to say, this knotting structure only realizes the action of winding the rope 360 degrees to form a loop, and does not realize the final knotting action.

[0005] It can be seen that the above-mentioned rope knotting mechanisms still have deficiencies in use and fail to meet the use requirements. Summary of the Utility Model

[0006] Aiming at the deficiencies of the prior art, the purpose of the present utility model is to provide a rope knotting mechanism, which can realize winding the rope 360 degrees to form a loop with the assistance of an external power mechanism, and can pass the end of the rope through the rope loop to complete the complete knotting action.

[0007] The above technical purpose of the present utility model is achieved through the following technical solutions:

[0008] A rope knotting mechanism, comprising: a support plate, a fixed shaft disposed on the support plate and provided with a core-pulling through hole, a first transmission gear movably sleeved on the fixed shaft, a second transmission gear rotatably disposed on the support plate and used to drive the first transmission gear to rotate around the fixed shaft as the axis, a first clamping member disposed on the support plate and used to clamp one end of the rope, a second clamping member slidably disposed on the support plate and used to clamp the other end of the rope, a third clamping member disposed on the first transmission gear and used to drive the rope to form a loop, and a hook rod slidably disposed in the core-pulling through hole and used to pass the end of the looped rope from the outside of the rope to the inside; a baffle is rotatably disposed on the support plate and used to drive the third clamping member to switch from a closed state to a released state; a transmission member is slidably disposed on the support plate and used to drive the first transmission gear to reciprocate on the fixed shaft; the first transmission gear is meshed with the second transmission gear, the end of the transmission member is movably abutted against the first transmission gear, and the baffle is movably abutted against the third clamping member; the second transmission gear is driven to rotate by a first external power mechanism, the second clamping member is driven to slide by a second external power mechanism, the hook rod is driven to slide by a third external power mechanism, the baffle is driven to rotate by a fourth external power mechanism, and the transmission member is driven to slide by a fifth external power mechanism.

[0009] Optionally, a circular ring groove extending from the outer wall of the first transmission gear towards its center is provided in the middle of the first transmission gear, and a first convex rod used to movably abut against the side wall of the circular ring groove to drive the first transmission gear to reciprocate is provided at the end of the transmission member, and one end of the first convex rod is located in the circular ring groove.

[0010] Optionally, a first bearing used to reduce the friction between the first convex rod and the first transmission gear is provided on the first convex rod.

[0011] Optionally, the first clamping member, the second clamping member and the third clamping member are all normally closed clamping members.

[0012] Optionally, the third clamping member includes: a clamping fixed seat provided with a rope groove, a clamping sliding block, and a tension spring; the clamping sliding block is movably clamped with the clamping fixed seat; one end of the tension spring is fixedly connected with the clamping sliding block, and the other end is fixedly connected with the clamping fixed seat; normally, the end of the clamping sliding block abuts against the side wall of the rope groove.

[0013] Optionally, a second convex rod used to movably abut against the baffle to switch the third clamping member from a closed state to a released state is provided on the clamping sliding block, and a second bearing used to reduce the friction between the second convex rod and the baffle is provided on the second convex rod.

[0014] The utility model has the following beneficial effects: With the assistance of the external power mechanism, the mechanism can form a loop by winding the rope 360 degrees and can pass the end of the rope through the rope loop to complete a complete knotting action, thereby saving human resources and improving production efficiency. Description of the Drawings

[0015] Figure 1 It is a step diagram of the rope completing the knotting action;

[0016] Figure 2 It is a schematic structural diagram of the present utility model;

[0017] Figure 3 It is a schematic diagram of the partial structure of the present utility model;

[0018] Figure 4 It is an exploded view of the present utility model;

[0019] Figure 5 It is a state diagram of the baffle in the present utility model when it is in the working position;

[0020] Figure 6 It is a state diagram of the baffle in the present utility model when it leaves the working position;

[0021] Figure 7 It is a schematic structural diagram of the first transmission gear in the present utility model;

[0022] Figure 8 It is a schematic structural diagram of the transmission member in the present utility model;

[0023] Figure 9 It is a schematic structural diagram of the third clamping member in the present utility model;

[0024] Figure 10 It is a partial cross-sectional view of the third clamping member in the present utility model.

[0025] In the figure: 1, support plate; 2, fixed shaft; 3, first transmission gear; 31, circular ring groove; 4, second transmission gear; 5, first clamping member; 6, second clamping member; 7, third clamping member; 71, clamping fixed seat; 711, rope groove; 72, clamping sliding block; 73, tension spring; 74, second convex rod; 75, second bearing; 8, hook rod; 9, baffle; 10, transmission member; 101, first convex rod; 102, first bearing. Detailed Description of the Preferred Embodiments

[0026] In order to make the objectives, features, and advantages of the present utility model more obvious and understandable, the following provides a detailed description of the specific embodiments of the present utility model with reference to the accompanying drawings. Several embodiments of the present utility model are shown in the drawings. However, the present utility model can be implemented in many different forms and is not limited to the embodiments described herein.

[0027] In the present utility model, unless otherwise clearly defined and limited, terms such as "installation", "connection", "linkage", "fixation" shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be a direct connection or an indirect connection through an intermediate medium, and it may be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances. The terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features.

[0028] In the present utility model, unless otherwise clearly defined and limited, the first feature being "above" or "below" the second feature may include the direct contact between the first and second features, or may include the situation where the first and second features are not in direct contact but in contact through other features therebetween. Moreover, the first feature being "above", "over" and "on top of" the second feature includes that the first feature is directly above and obliquely above the second feature, or merely indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature being "under", "beneath" and "underneath" the second feature includes that the first feature is directly below and obliquely below the second feature, or merely indicates that the horizontal height of the first feature is lower than that of the second feature. Terms such as "vertical", "horizontal", "left", "right", "up", "down" and similar expressions are only for the purpose of illustration, rather than indicating or implying that the indicated device or element must have a specific orientation, be constructed and operated in a specific orientation, and thus cannot be understood as a limitation to the present utility model.

[0029] The present utility model will be described in detail below with reference to the accompanying drawings and embodiments.

[0030] The present utility model provides a rope knotting mechanism, as Figure 2-6As shown in the figure, it includes: a support plate 1, a fixed shaft 2 disposed on the support plate 1 and provided with a core-pulling through hole (not marked in the attached drawing), a first transmission gear 3 movably sleeved on the fixed shaft 2, a second transmission gear 4 rotatably disposed on the support plate 1 and used to drive the first transmission gear 3 to rotate around the fixed shaft 2 as the axis, a first clamping member 5 disposed on the support plate 1 and used to clamp one end of the rope, a second clamping member 6 slidably disposed on the support plate 1 and used to clamp the other end of the rope, a third clamping member 7 disposed on the first transmission gear 3 and used to drive the rope to be wound into a loop, and a hook rod 8 slidably disposed in the core-pulling through hole and used to pass the end of the rope wound into a loop from the outside of the rope to the inside; a baffle plate is rotatably disposed on the support plate 1 and used to drive the third clamping member 7 to switch from a closed state to a released state; a transmission member 10 is slidably disposed on the support plate 1 and used to drive the first transmission gear 3 to reciprocate on the fixed shaft 2; the first transmission gear 3 is meshed and connected with the second transmission gear 4, the end of the transmission member 10 is movably abutted against the first transmission gear 3, and the baffle plate 9 is movably abutted against the third clamping member 7; the second transmission gear 4 is driven to rotate by a first external power mechanism, the second clamping member 6 is driven to slide by a second external power mechanism, the hook rod 8 is driven to slide by a third external power mechanism, the baffle plate is driven to rotate by a fourth external power mechanism, and the transmission member 10 is driven to slide by a fifth external power mechanism.

[0031] In this embodiment, the fixed shaft 2 is fixed on the support plate 1 by existing methods such as welding and screwing; the first clamping member 5 is fixed on the support plate 1 by existing methods such as welding and screwing, and is located on the left side of the fixed shaft 2; the second clamping member 6 is installed on the support plate 1 through a slide table or a pin hole structure, and is located on the right side of the fixed shaft 2, etc. The second clamping member 6 and the support plate 1 are in a relatively sliding state as a whole. The second clamping member 6 slides in a direction perpendicular to the support plate 1 under the drive of the second external power mechanism; the second external power mechanism can be any one of a cylinder, an electric cylinder, and a screw slide table, as long as it can drive the second clamping member 6 to slide. The first clamping member 5, the second clamping member 6, and the fixed shaft 2 are almost at the same horizontal height. A through hole is opened at the center of the first transmission gear 3, and the diameter of this through hole is slightly larger than the outer diameter of the fixed shaft 2, so that the first transmission gear 3 can rotate and slide on the fixed shaft 2. The second transmission gear 4 is rotatably connected to the support plate 1 by means of a pin shaft and a pin hole, and drives the first transmission gear 3 to rotate under the drive of the first external power mechanism. The first external power mechanism is a conventional servo motor or a stepping motor. In addition, the second transmission gear 4 can also be directly installed on the output shaft of the servo motor, and the fixed end of the servo motor is installed on the support plate 1. A transmission member 10 is slidably installed on the upper end of the support plate 1 by a sliding member such as a cylinder, an electric cylinder, or a screw slide table. The transmission member 10 is a long bar-shaped structure and can slide back and forth on the transmission member 10 after passing through the installation hole on the support plate 1 that is adapted to the transmission member. The fifth external power mechanism is a cylinder or an electric cylinder. The base of the cylinder or the electric cylinder is installed on the support plate 1, and its output end is fixedly connected to the transmission member 10, thereby pushing the transmission member 10 to slide back and forth on the support plate. The transmission member 10 correspondingly pushes the first transmission gear 3 to slide back and forth on the fixed shaft 2. The third clamping member 7 is installed on the outer edge of the first transmission gear 3 by existing methods such as screw fixing and welding fixing, and rotates around the fixed shaft 2. The lower end of the baffle 9 is rotatably installed on the support plate 1, and its upper end abuts against the third clamping member 7 movably. When the upper end of the baffle 9 abuts against the third clamping member 7, the third clamping member 7 is in a released state; when the upper end of the baffle 9 does not abut against the third clamping member 7, the third clamping member 7 is in a locked state. The baffle 9 is driven to rotate by the fourth external power mechanism. The fourth external power mechanism is a rotary cylinder. The fixed end of the rotary cylinder is installed on the support plate 1, and its drive shaft is tightly fixed to the lower end of the baffle 9, thereby driving the baffle 9 to rotate by a certain angle. The hook rod 8 is a cylindrical structure, and a groove in the shape of a hook is opened at its right end. The outer diameter of the hook rod 8 is slightly smaller than the diameter of the core-pulling through hole, and it can slide back and forth in the core-pulling through hole. The left end of the hook rod 8 is connected to the third external power mechanism. The third external power mechanism is a cylinder or an electric cylinder. The mounting seat of the cylinder or the electric cylinder is fixedly installed on the support plate 1, and its output end is tightly fixed to the left end of the hook rod 8, driving the hook rod 8 to slide.

[0032] The working principle of the present utility model is as follows: First, straighten a rope, clamp its left end on the first clamping member 5, and clamp its right end on the second clamping member 6. At this time, the third clamping member 7 is below the rope and is pressed tightly by the baffle 9, and is in a loose state (as shown in Figure 5 ). Then, under the action of the first external power mechanism, the third clamping member 7 rotates counterclockwise by 180 degrees to reach above the rope (as shown in Figure 6 ). Then, the baffle 9 rotates clockwise by a certain angle under the drive of the fourth external power mechanism, so that the third clamping member 7 clamps the rope. Then, the third clamping member 7 continues to rotate counterclockwise. During this period, the first clamping member 5 releases the end of the rope, and the second clamping member 6 slides outward along the rope under the action of the second external power mechanism. After ensuring that the rope is crossed and the end of the rope is on the inner side, after continuing to rotate 360 degrees, the rope is crossed (the state shown as S1 in Figure 1 ). Then, the third clamping member 7 continues to rotate counterclockwise. During this period, the transmission member 10 indirectly pushes the third clamping member 7 to slide outward along the rope under the action of the fifth external power mechanism, thereby driving the end of the rope to move forward to the outside of the intersection point. After continuing to rotate 180 degrees, the rotation stops, and the third clamping member 7 returns to below the rope again. At this time, under the drive of the forward movement and rotation actions of the third clamping member 7, the rope completes two actions of moving forward and moving toward the center at the end of the rope (the states shown as S2 and S3 in Figure 1 ). At this time, the end of the rope passes through the hook part of the hook rod 8. Then, under the action of the third external power mechanism, the hook rod 8 pulls the end of the rope to completely pass through the loop in the middle of the rope, completing the knotting action (the state shown as S4 in Figure 1 ). Among them, the clamping force of the second clamping member 6 is greater than that of the first clamping member 5. After the rope is clamped by the third clamping member 7, it can slide under a certain pulling force, so as to ensure that the third clamping member 7 pulls the end of the rope off the first clamping member 5, and then clamps the rope to form a loop.

[0033] It can be seen that with the assistance of multiple external power mechanisms, the present utility model can realize forming a loop by winding the rope 360 degrees, and can pass the end of the rope through the rope loop to complete a complete knotting action, thereby saving human resources and improving production efficiency.

[0034] Furthermore, a circular ring groove 31 extending from its outer wall toward its center is formed in the middle of the first transmission gear 3. The end of the transmission member 10 is provided with a first convex rod 101 for movably pressing against the side wall of the circular ring groove 31 to drive the first transmission gear 3 to slide back and forth, and one end of the first convex rod 101 is located in the circular ring groove 31.

[0035] As shown in Figure 7-8As shown, the first convex rod 101 is fixed to the bottom of the transmission member 10 by means of threaded connection or welding, located within the circular ring groove 31, with gaps between it and the two side walls of the circular ring groove 31, for driving the first transmission gear 3 to slide back and forth on the fixed shaft 2, indirectly driving the third clamping member 7 to slide back and forth on the fixed shaft 2. The first convex rod 101 can be any one of a conventional cylindrical rod or a screw.

[0036] Furthermore, in order to reduce the frictional force between the first convex rod 101 and the first transmission gear 3 and prevent significant wear between these two parts, a first bearing 102 is installed on the first convex rod 101.

[0037] Furthermore, the first clamping member 5, the second clamping member 6, and the third clamping member 7 are all normally closed clamping members, and the structures of the three are the same. The following takes the third clamping member 7 as an example for explanation. The third clamping member 7 includes: a clamping fixed seat 71 with a rope groove 711 opened therein, a clamping sliding block 72, and a tension spring 73; the clamping sliding block 72 is movably clamped with the clamping fixed seat 71; one end of the tension spring 73 is fixedly connected to the clamping sliding block 72, and the other end thereof is fixedly connected to the clamping fixed seat 71; under normal conditions, the end of the clamping sliding block 72 abuts against the side wall of the rope groove 711.

[0038] As Figure 9-10 shown, a limiting structure is provided within the clamping fixed seat 71 such that the clamping sliding block 72 can slide in its length direction. The left end of the tension spring 73 pulls the clamping fixed seat 71, and the right end pulls the clamping sliding block 72, enabling the clamping sliding block 72 to abut against the side wall of the rope groove 711 under normal conditions. In addition, the tension spring 73 can also be replaced with a conventional compression spring. The left end of the compression spring abuts against the clamping sliding block 72, and the right end abuts against the clamping fixed seat 71, driving the clamping sliding block 72 to abut against the side wall of the rope groove 711 under normal conditions. The limiting structure within the clamping fixed seat 71 can be adjusted according to conventional techniques and will not be elaborated herein.

[0039] Furthermore, a second convex rod 74 for movably abutting against the baffle to switch the third clamping member 7 from the closed state to the released state is provided on the clamping sliding block 72. A second bearing 75 for reducing the frictional force between the second convex rod 74 and the baffle 9 is provided on the second convex rod 74, and the second bearing 75 can prevent significant wear between the second convex rod 74 and the baffle 9. The second convex rod 74 can be any one of a conventional cylindrical rod or a screw.

[0040] The above are only the preferred embodiments of the present invention. The protection scope of the present invention is not limited to the above embodiments. Any technical solutions falling within the concept of the present invention belong to the protection scope of the present invention. It should be noted that for those of ordinary skill in the art in this technical field, several improvements and refinements made without departing from the principle of the present invention should also be regarded as within the protection scope of the present invention.

Claims

1. A rope knotting mechanism, characterized in that: include: A support plate, a fixed shaft arranged on the support plate and provided with a core-pulling through hole, a first transmission gear movably sleeved on the fixed shaft, a second transmission gear rotatably arranged on the support plate and used to drive the first transmission gear to rotate around the fixed shaft, a first clamping piece arranged on the support plate and used to clamp one end of the rope, a second clamping piece slidably arranged on the support plate and used to clamp the other end of the rope, a third clamping piece arranged on the first transmission gear and used to drive the rope to be wound into a loop, and a hook rod slidably arranged in the core-pulling through hole and used to pass the end of the rope wound into a loop from the outside of the rope to the inside; A baffle is rotatably provided on the plate for driving the third clamping member to switch from a closed state to a loosened state; a transmission member is slidably provided on the support plate for driving the first transmission gear to slide back and forth on the fixed shaft; the first transmission gear is meshed and connected with the second transmission gear, the end of the transmission member is movably pressed against the first transmission gear, and the baffle is movably pressed against the third clamping member; the second transmission gear is driven to rotate by the first external power mechanism, the second clamping member is driven to slide by the second external power mechanism, the hook rod is driven to slide by the third external power mechanism, the baffle is driven to rotate by the fourth external power mechanism, and the transmission member is driven to slide by the fifth external power mechanism.

2. The rope knotting mechanism according to claim 1, characterized in that: A circular groove extending from the outer wall toward the center is provided in the middle of the first transmission gear, and a first protruding rod is provided at the end of the transmission member for movably pressing against the side wall of the circular groove to drive the first transmission gear to slide back and forth, and one end of the first protruding rod is located in the circular groove.

3. The rope knotting mechanism according to claim 2, characterized in that: The first protruding rod is provided with a first bearing for reducing the friction force between the first protruding rod and the first transmission gear.

4. The rope knotting mechanism according to claim 1, characterized in that: The first clamping member, the second clamping member and the third clamping member are all normally closed clamping members.

5. The rope knotting mechanism according to claim 4, characterized in that: The third clamping member includes: a clamping fixed seat with a rope groove, a clamping sliding block, and a tension spring; the clamping sliding block is movably connected to the clamping fixed seat; one end of the tension spring is fixedly connected to the clamping sliding block, and the other end is fixedly connected to the clamping fixed seat; under normal conditions, the end of the clamping sliding block is pressed against the side wall of the rope groove.

6. The rope knotting mechanism according to claim 5, characterized in that: The clamping sliding block is provided with a second protruding rod for movably pressing against the baffle plate so as to switch the third clamping member from a closed state to a loose state. The second protruding rod is provided with a second bearing for reducing the friction between the second protruding rod and the baffle plate.

Images