An automatic cotton-stuffing machine and method for exchanging needle caps

Abstract

This invention relates to an automatic cotton-stuffing machine and method for exchanging needle caps, comprising: a frame for mounting a prime mover and a working machine or actuator; a rotating component on the frame, with several sets of bases on the edge of the rotating component; a cap feeding mechanism, a cotton feeding mechanism, a cotton cap insertion mechanism, a cotton stuffing mechanism, a cotton detection mechanism, a defect rejection mechanism, and a feeding mechanism arranged sequentially around the frame outside the rotating component; the rotating component is used to realize the intermittent movement of several sets of caps, cooperating with the actuator to realize the various assembly steps in the process of stuffing cotton clumps into caps, and the above mechanisms are arranged sequentially around the frame around the rotary table, so that each mechanism can realize the corresponding assembly step synchronously during the intermittent movement of the rotary table, and the entire automatic cotton stuffing process can be realized continuously.

Description

Technical Field

[0001] This invention relates to the field of medical device manufacturing technology, and in particular to an automatic cotton-stuffing machine and method for exchanging needle caps. Background Technology

[0002] Currently, syringes are commonly used in experimental and therapeutic fields. For example, when humans or animals are sick, they are often treated by injecting drugs into them using syringes. The injection needle on the syringe is an indispensable part of the entire tool. The drug is introduced into the human or animal body through the needle tip installed on the injection needle. An interchangeable needle for a syringe includes a needle tip, a needle hub, a sheath, and a cap. The needle tip and needle hub are riveted together to form a riveted needle. The riveted needle is installed inside the sheath. The sheath has a snap-fit ​​cap that seals the riveted needle inside the snap-fit ​​sheath and cap. The bottom of the cap is stuffed with cotton to protect the needle tip. Currently, it is generally done manually by first cutting cotton strips into small pieces and then manually stuffing the cotton into the cap. A pusher is used to push the cotton into the bottom of the cap. This increases the amount of manual labor required, and if the operation is not careful, it is easy to miss the cotton. Summary of the Invention

[0003] The purpose of this invention is to overcome the defects in the prior art and provide an automatic cotton stuffing machine and cotton stuffing method for exchanging needle caps, which can realize automatic cotton stuffing.

[0004] To achieve the above objectives, the technical solution of the present invention is to design an automatic cotton-stuffing machine for exchanging needle caps, characterized in that it includes:

[0005] A frame is used to mount a prime mover and a driven machine or actuator.

[0006] The frame is equipped with a rotating component, and the edge of the rotating component is provided with several sets of bases;

[0007] The frame outside the rotating part is sequentially arranged with a cap feeding mechanism, a cotton feeding mechanism, a cotton cap insertion mechanism, a cotton stuffing mechanism, a cotton detection mechanism, a defect removal mechanism, and a feeding mechanism.

[0008] The rotary component is used to realize the intermittent movement of several sets of protective caps, and cooperates with the actuator to realize the various assembly steps in the process of stuffing cotton into the protective caps;

[0009] The needle feeding mechanism installs the protective cap on the base in an intermittent rhythm;

[0010] The cotton feeding mechanism cuts strips of cotton into small cotton balls according to an intermittent rhythm and fills them into the protective cap;

[0011] The cotton-in-hat mechanism blows the cotton ball into the cap at intermittent rhythms.

[0012] The cotton-stuffing mechanism pushes the cotton ball into the bottom of the protective cap through a push rod in an intermittent rhythm.

[0013] The cotton detection mechanism uses a detection rod to check whether there are cotton clumps inside the protective cap at intermittent intervals.

[0014] The defect removal mechanism removes the defective caps by using a removal plate in an intermittent rhythm.

[0015] The feeding mechanism, in an intermittent rhythm, causes the protective cap to detach from the base via the feeding baffle;

[0016] The frame is also equipped with a drive mechanism, which drives the rotating component to perform intermittent motion;

[0017] The frame is also equipped with a controller, which receives feedback information from the sensors and issues action commands to the prime mover and the working machine or actuator.

[0018] The drive mechanism includes a drive motor and a reducer disposed within the frame. The output shaft of the drive motor is connected to the input end of the reducer, the output end of the reducer is connected to the input end of the indexer, and the output end of the indexer is connected to the rotating component.

[0019] A further preferred technical solution is that the base is an arc-shaped notch formed on the rotating component, and an arc-shaped retaining ring is provided on the edge of the rotating component.

[0020] A further preferred technical solution is that each set of the bases has a guide structure on the rotating component. The guide mechanism includes a guide block and a support block. The support block is a right-angle plate structure and is fixed on the rotary table. The support block has through holes that correspond one-to-one with the bases. The support block has a guide block and a guide hole that penetrates the body. The guide hole is a tapered hole and is connected to the through hole.

[0021] A further preferred technical solution is that the cotton feeding mechanism includes a cotton feeding bracket, the upper end of which is provided with an arc-shaped guide plate, and the lower end of which is provided with a pair of feeding rollers. The two ends of each feeding roller are mounted on the cotton feeding bracket through bearing brackets. A gear is provided at the corresponding ends of the pair of feeding rollers, and the pair of gears are meshed together. A pulley is provided at the other end of one of the feeding rollers. The cotton feeding bracket is provided with a servo motor, and the output end of the servo motor is provided with a pulley. The two pulleys are connected by a belt.

[0022] A further preferred technical solution includes a detachable pair of scissors located below the pair of feed rollers. The rivet portion of the scissors is mounted on a mounting block. The mounting block is mounted on the cotton feeding bracket via a mounting support. The mounting support has a guide groove, and the mounting block can slide in the guide groove and be locked by a top wire.

[0023] A shearing cylinder is provided on the side of the scissors near the rotary table. The piston rod of the shearing cylinder is connected to one of the blades of the scissors through a connector. The shearing cylinder drives the scissors to open or close, cutting the strip of cotton into small cotton balls and stuffing them into the protective cap.

[0024] The shear support is also provided with a linear guide rail. The piston rod of the shear cylinder is connected to the linear guide rail. The linear guide rail is connected to one blade of the shears. The shears are driven to open or close through the linear guide rail.

[0025] A further preferred technical solution is that the frame on the side of the cotton feeding support away from the rotary table is provided with at least two cotton material trays, on which finished cotton sliver trays can be placed.

[0026] A further preferred technical solution is that at least two grooves are formed on the outer periphery of each of the feed rollers, and one groove of one feed roller is paired with one groove of another feed roller, so that the cotton thread moves in a direction along the pair of grooves.

[0027] A further preferred technical solution is to provide a wire harness plate spanning above the feed roller on the bearing bracket, and the wire harness plate is provided with at least two wire harness holes.

[0028] A further preferred technical solution is that the shearing cylinder is mounted on the cotton feeding bracket via a shearing support, the shearing support is rotatably mounted on a screw, the cotton feeding bracket is provided with a mounting plate, the mounting plate is provided with a mounting hole, the screw passes through the mounting hole and is locked to the mounting plate by a nut.

[0029] A further preferred technical solution includes a cotton-filling mechanism comprising a cotton-filling bracket, a cotton-filling cylinder mounted on the bracket, a cotton-filling connecting plate mounted on the drive shaft of the cylinder, two air holes on the connecting plate, and a solenoid valve mounted on each air hole. The output end of the solenoid valve is connected to the air hole, and the input end of the solenoid valve is connected to compressed air via an air pipe. The lower end face of the connecting plate matches the upper end face of the guide block.

[0030] A method for stuffing cotton into an automatic cotton-stuffing machine with interchangeable needle caps includes the following steps:

[0031] S1: The cap feeding mechanism is controlled by the controller to install the caps on the base according to a certain rhythm and to rotate and transfer the caps by the rotary table;

[0032] S2: The cotton feeding mechanism is controlled by the controller to cut the cotton strips into small cotton balls according to a certain rhythm and install them inside the protective cap;

[0033] S3: The cotton feeding mechanism is controlled by the controller to blow the cotton ball into the cap at a certain rhythm;

[0034] S4: The cotton stuffing mechanism is controlled by the controller to push the cotton ball into the bottom of the cap at a certain rhythm;

[0035] S5: Repeat step S4;

[0036] S6: The cotton detection mechanism is controlled by the controller to check whether there is a cotton ball inside the cap at a certain rhythm;

[0037] S7: The defect rejection mechanism is controlled by the controller, and the defective caps are rejected according to a certain rhythm based on the signal from the cotton detection mechanism;

[0038] S8: The feeding mechanism is controlled by the controller to move the protective cap from the base to the receiving hopper according to a certain rhythm.

[0039] A further preferred technical solution is that, in step S2, the scissors driven by a cylinder cut the strip of cotton into small cotton balls, and the cotton balls automatically fall into the protective cap through a conical guide hole.

[0040] A further preferred technical solution is that, in step S3, the cotton ball is blown into the inside of the protective cap using compressed gas.

[0041] The advantages and beneficial effects of the present invention are as follows: an automatic cotton stuffing machine for syringe caps, wherein any assembly step in the cotton stuffing process is realized by a corresponding mechanism, and in order to achieve continuous assembly, the mechanisms are continuously arranged around the indexer, so that each mechanism can realize the corresponding assembly step synchronously during intermittent movement, and the entire cotton stuffing process can be realized continuously.

[0042] The system includes a cap feeding mechanism, a cotton feeding mechanism, a cotton cap insertion mechanism, a cotton stuffing mechanism, a cotton detection mechanism, a defect removal mechanism, and a feeding mechanism. In order to achieve continuous assembly, the above-mentioned mechanisms are arranged sequentially around the frame around the rotary table. During the intermittent movement of the rotary table, each mechanism can synchronously perform the corresponding assembly steps, and the entire automatic cotton stuffing process can be continuously realized.

[0043] The cotton strips are cut into small cotton balls by a cotton feeding mechanism and stuffed into the cap. Attached Figure Description

[0044] Figure 1 This is an isometric view of the present invention;

[0045] Figure 2 For the present invention Figure 1 Top view;

[0046] Figure 3 This is an isometric view of the controllerless version of the present invention;

[0047] Figure 4 This is one of the isometric views of the cotton feeding mechanism of the present invention;

[0048] Figure 5 This is the second isometric view of the cotton feeding mechanism of the present invention;

[0049] Figure 6 This is a partial isometric view of the present invention;

[0050] Figure 7 This is an isometric drawing of a protective cap. Detailed Implementation

[0051] The specific embodiments of the present invention will be further described below with reference to the accompanying drawings and examples. The following examples are only used to more clearly illustrate the technical solutions of the present invention and should not be construed as limiting the scope of protection of the present invention.

[0052] like Figure 1-6As shown, an automatic cotton-stuffing machine for interchangeable needle caps is provided. The interchangeable needle includes a needle tip, needle base, sheath, and cap. The needle tip and needle base are riveted together to form a riveting needle, which is installed inside the sheath. The sheath has a snap-fit ​​cap that seals the riveting needle inside the snap-fitted sheath and cap. The bottom of the cap is stuffed with cotton to protect the needle tip. To achieve automatic cotton stuffing inside the cap, this invention provides an automatic cotton-stuffing machine for syringe caps. Each assembly step in the stuffing process is implemented by a corresponding mechanism. To achieve continuous assembly, the mechanisms are continuously arranged around the indexer 902, allowing each mechanism to be implemented synchronously during intermittent movement. The corresponding assembly steps can continuously realize the entire cotton stuffing process. Specifically, an automatic cotton stuffing machine for syringe caps includes a frame 100, which is a box-type frame. The frame 100 is equipped with an indexer 902, which enables intermittent movement and continuous feeding. At the same time, different mechanisms can synchronously realize their respective assembly steps, ultimately stuffing the cotton ball into the cap. The frame 100 is equipped with a drive motor 901 and a reducer. The output shaft of the drive motor 901 is connected to the input end of the reducer, and the output end of the reducer is connected to the input end of the indexer 902. The reducer matches the speed and transmits torque between the prime mover and the working machine or actuator.

[0053] like Figure 1-6 As shown, the output end of the indexer 902 is connected to a rotary table 700. The rotary table 700 has several sets of bases 701. The number of bases 701 is related to the cotton stuffing step. Generally, one cotton stuffing step corresponds to one set of bases 701. To adjust the assembly frequency and match the intermittent rhythm of the indexer 902, a set of bases 701 may be set between two assembly steps for transition. Alternatively, two or more sets of bases 701 may be set in one assembly step to achieve the corresponding assembly step. In this embodiment, the rotary table 700 has eight sets of bases 701. The bases 701 are arranged in a ring near the edge of the rotary table 700. Each group includes at least two bases 701. The two bases 701 in any group are equally spaced. The bases 701 are mainly used for bearing and transferring the protective cap. The bases 701 are set on the rotary table 700 and rotate with the rotary table 700 to transfer the protective cap to the corresponding work station of the assembly step. Finally, the cotton ball is stuffed into the protective cap. After the cotton-stuffed protective cap is unloaded, the base 701 is emptied. Then, it rotates back to the protective cap feeding mechanism 200 for protective cap feeding. The cycle continues.

[0054] A controller 400 is provided on the frame 100 on one side of the rotary table 700. The controller 400 is a PLC or MCU controller. The controller 400 receives sensor commands and sends action commands to the actuator.

[0055] like Figure 1-6 As shown, to ensure the protective cap can be stably placed on the base 701 and is not easily dislodged during the rotation of the rotary table 700, this embodiment provides a base 701. The base 701 is an arc-shaped notch directly formed in the rotary table 700. The outer periphery of the protective cap has a raised ring. The raised ring is placed on the arc-shaped notch, allowing the protective cap to be suspended at the edge of the rotary table 700. An arc-shaped retaining ring 702 is provided at the edge of the rotary table 700. The arc-shaped retaining ring 702 is set along the edge of the rotary table 700. When the protective cap is placed on the arc-shaped notch, it may fall off at any time. The arc-shaped retaining ring 702 confines the protective cap within the arc-shaped notch. The arc-shaped retaining ring 702 is supported by a set of support rods 703 at the edge of the rotary table 700. The length of the arc-shaped retaining ring 702 is adjusted according to the structure, generally at the position corresponding to the material cutting. The arc-shaped retaining ring 702 has an opening that allows the protective cap to detach from the arc-shaped notch.

[0056] To enable the cotton ball to automatically fall into the protective cap, each set of bases 701 has a guide structure 140 on the corresponding turntable 700. The guide structure 140 includes a guide block 141 and a support block 142. The support block 142 is a right-angled plate structure. The support block 142 forms a space at the upper end of the protective cap to accommodate the protective cap exposed on the upper section of the turntable 700. The support block 142 is fixed on the turntable 700. The support block 142 has through holes that correspond one-to-one with the base 701; the support block 142 has a guide block 141, and the guide block 141 has a guide hole 143 that penetrates the body. The guide hole 143 is a conical hole and is connected to the through hole. When the cotton ball falls into the guide hole 143, it can automatically fall into the through hole along the guide hole 143, and then fall into the protective cap through the through hole. The guide hole 143 can collect and guide the cotton ball.

[0057] like Figure 1As shown, the cotton stuffing process includes at least cap feeding, cotton feeding, cotton insertion into the cap, stuffing, cotton detection, defect removal, and unloading. For each assembly step in the stuffing process, a corresponding mechanism is required to implement the assembly step. The frame includes at least a cap feeding mechanism 200, a cotton feeding mechanism 300, a cotton insertion into the cap mechanism 500, a stuffing mechanism 600 / 800, a cotton detection mechanism 110, a defect removal mechanism 120, and an unloading mechanism 130. To achieve continuous assembly, the above mechanisms are sequentially arranged around the frame 100 surrounding the rotary table 700. During the intermittent movement of the rotary table 700, each mechanism can synchronously implement the corresponding assembly step, and the entire automatic cotton stuffing process can be continuously realized.

[0058] During the dynamic process, the base 701 intermittently advances from the position of the first group in the static state to the position of the eighth group, and rotates continuously in a cycle.

[0059] This embodiment describes the corresponding specific mechanism and base 701 in a static state in detail.

[0060] like Figure 1-6 As shown, the cap feeding mechanism 200 is mounted on the frame 100 outside the rotary table 700 corresponding to the first set of bases. The cap feeding mechanism 200 includes a cap vibrating plate, which adjusts the caps to feed them in the same state with the open end facing upwards. The cap discharge end of the cap vibrating plate is provided with an inclined cap receiving plate 201. The cap receiving plate 201 is provided with a set of cap receiving grooves, and the caps fall directly into the first set of bases along the inclined cap receiving grooves.

[0061] The vibratory feeder for the protective cap can adopt the vibratory feeder structure of the safety syringe needle seat feeding device disclosed in Publication No. CN217894276U, or the vibratory feeder for directional sorting and conveying of injection needle seats disclosed in Publication No. CN112093428A, or the vibratory feeder structure of an automatic directional feeding machine for blood collection needle hard seats disclosed in Publication No. CN105109931A, as long as the structure of the material channel matches the shape of the protective cap.

[0062] The cotton feeding mechanism 300 is mounted on the frame 100 outside the rotary table 700 corresponding to the second base of the second group. The cotton feeding mechanism 300 includes a cotton feeding bracket 310. The upper end of the cotton feeding bracket 310 is provided with an arc-shaped guide plate 302. The lower end of the arc-shaped guide plate 302 is provided with a pair of feeding rollers 312. Both ends of each feeding roller 312 are mounted on the cotton feeding bracket 310 through a bearing bracket 313. A gear 316 is provided at the corresponding end of the pair of feeding rollers 312. The pair of gears 316 are meshed and connected. A pulley is provided at the other end of one of the feeding rollers 312. The cotton feeding bracket 310 is provided with a servo motor 315. The output end of the servo motor 315 is provided with a pulley. The two pulleys are connected by a belt 314.

[0063] In order to ensure that the cotton thread can be accurately aligned with the guide mechanism 140, at least two grooves are provided on the outer periphery of each feed roller 312. One groove of one feed roller 312 is paired with one groove of another feed roller 12, so that the cotton thread moves in a directional manner along a pair of grooves, preventing the thread from swaying on the pair of feed rollers 312.

[0064] A wire harness plate 303 is provided on the bearing bracket 313, which spans above the feed roller 312. The wire harness plate 303 is provided with at least two wire harness holes 304. The cotton thread passes through the arc-shaped guide plate 302, then through the corresponding wire harness hole 304, and then enters the wire groove of the corresponding pair of feed rollers 312. It is intermittently fed under the drive of the servo motor.

[0065] A detachable shear 311 is provided below the pair of feed rollers 312. The rivet part of the shear 311 is mounted on the mounting block 317. The mounting block 317 is set on the cotton feeding bracket 310 through the mounting support 318. The mounting support 318 is provided with a guide groove. The mounting block 317 can slide in the guide groove and be locked by the top screw. This allows the position of the blade of the shear 311 cutting the cotton strip to make the cutting of the cotton strip smoother.

[0066] A shearing cylinder 308 is provided on the side of the scissors 311 near the rotary table 700. The piston rod of the shearing cylinder 308 is connected to one of the blades of the scissors 311 through a connector. The shearing cylinder 308 drives the scissors 311 to open or close, cutting the strip of cotton into small pieces and stuffing them into the protective cap.

[0067] The shearing cylinder 308 is mounted on the cotton feeding bracket 310 via a shearing support 307. The shearing support is rotatably mounted on a screw 306. The cotton feeding bracket 100 is provided with a mounting plate 307, which has mounting holes. The screw 306 passes through the mounting holes and is locked onto the mounting plate 307 by a nut 305. This allows the distance between the shearing cylinder 308 and the shears 311 to be adjusted by rotating the screw 306, thus accommodating the stroke of the shearing cylinder 308.

[0068] The shearing support is also provided with a linear guide rail 309. The piston rod of the shearing cylinder 308 is connected to the guide rail 309. The guide rail is connected to one blade of the scissors 311. The scissors 311 are driven to open or close via the linear guide rail 309.

[0069] At least two cotton feed trays 301 are provided on the side of the cotton feeding support 310 away from the rotary table 700, and finished cotton sliver trays can be placed on the cotton feed trays 301.

[0070] The cotton-filling mechanism 500 is mounted on the frame 100 outside the rotary table 700 corresponding to the third base. The cotton-filling mechanism 500 includes a cotton-filling bracket, a cotton-filling cylinder on the cotton-filling bracket, a cotton-filling connecting plate 501 on the piston rod of the cotton-filling cylinder, two air holes 502 on the cotton-filling connecting plate 501, and a solenoid valve installed on the air hole 502. The output end of the solenoid valve is connected to the air hole, and the input end of the solenoid valve is connected to compressed air through an air pipe. The lower end face of the cotton-filling connecting plate 501 matches the upper end face of the guide block 141. When the cotton-filling cylinder is at its minimum stroke, the lower end face of the cotton-filling connecting plate 501 is in contact with the upper end face of the guide block 141, and the cotton ball is blown into the cap by the gas. When the cotton-filling cylinder is at its maximum stroke, the lower end face of the cotton-filling connecting plate 501 is separated from the upper end face of the guide block 141.

[0071] The first cotton stuffing mechanism is set on the frame 100 outside the rotary table 700 corresponding to the fourth base. The first cotton stuffing mechanism includes a cotton stuffing bracket 601 / 801. The cotton stuffing bracket 601 / 801 is equipped with a cotton stuffing cylinder 602 / 802. The piston rod of the cotton stuffing cylinder 602 / 802 is equipped with a cotton stuffing connecting plate 603 / 803. The cotton stuffing connecting plate 603 / 803 is equipped with two push rods 604 / 804. The push rods 604 / 804 push the cotton ball inside the protective cap into the bottom of the protective cap.

[0072] Because the cotton ball is relatively soft, in order to ensure that the cotton ball is stuffed into the protective cap, a second cotton stuffing mechanism is also provided on the frame 700 to continuously push the cotton ball. The second cotton stuffing mechanism is set on the frame 100 outside the rotary table 700 corresponding to the fifth base. The second cotton stuffing mechanism includes a cotton stuffing bracket 601 / 801, a cotton stuffing cylinder 602 / 802 is provided on the cotton stuffing bracket 601 / 801, a cotton stuffing connecting plate 603 / 803 is provided on the drive shaft of the cotton stuffing cylinder 602 / 802, and two push rods 604 / 804 are provided on the cotton stuffing connecting plate 603 / 803. The push rods 604 / 804 push the cotton ball inside the protective cap into the bottom of the protective cap.

[0073] The cotton detection mechanism 110 is set on the frame 100 outside the rotary table 700 corresponding to the sixth base. The cotton detection mechanism 110 includes a cotton detection bracket 111. The cotton detection bracket 111 is equipped with a detection cylinder 112. The piston rod of the detection cylinder 112 is equipped with a detection connecting plate 113. The detection connecting plate 113 is equipped with at least two detection rods. Each detection rod is equipped with a photoelectric sensor. The photoelectric sensor extends into the protective cap through the detection rod and then detects whether there is a cotton ball inside the protective cap.

[0074] The defect removal mechanism 120 is mounted on the frame 100 outside the rotary table 700 corresponding to the seventh base. The defect removal mechanism 120 includes a defect removal bracket 121, which has at least two removal cylinders 122. The piston rod of each removal cylinder 122 is connected to a removal transfer plate 123, which is located outside the rotary table 700. A waste hopper 124 is located outside the rotary table 700 below the defect removal mechanism 120. The defect removal mechanism 120 removes the protective caps of defects to... Inside the waste hopper 124, the base is made empty, and then intermittent rotation is performed. If there is no cotton ball inside the protective cap, the cotton detection mechanism 110 transmits the detection signal to the rejection cylinder 122 of the defect rejection mechanism 120 through the control system. By controlling the operation of the rejection cylinder 122, the piston rod of the rejection cylinder 122 is retracted, causing the rejection plate 123 to move away from the rotary table 700. Since the protective cap is not blocked by the rejection plate 123, the protective cap falls off from the arc-shaped notch and automatically falls into the waste hopper 124.

[0075] In another embodiment, the defect removal mechanism 290 may also use a robotic arm with a finger-removing cylinder for unloading. The robotic arm removes the protective cap from the base, moves the finger-removing cylinder above the waste hopper 124, and then the finger-removing cylinder opens the protective cap and it automatically falls into the waste hopper 124.

[0076] like Figure 1-6 As shown, the feeding mechanism 130 is set on the frame 100 outside the rotary table 700 corresponding to the eighth base. The feeding mechanism 130 includes a feeding bracket, and the feeding bracket is provided with a feeding baffle 131. Specifically, the feeding baffle 131 has an inclined baffle that connects with the outer edge of the rotary table 700. During the rotation, the protective cap falls off from the arc-shaped notch along the baffle.

[0077] An inclined receiving hopper 132 is also provided on the frame 100 outside the feeding mechanism 130, and the protective cap falls into the receiving hopper 132.

[0078] Method of stuffing cotton:

[0079] S1: The cap feeding mechanism 200 is controlled by the controller to install the cap on the base 701 according to a certain rhythm and to rotate and transfer the cap through the rotary table 700.

[0080] S2: The cotton feeding mechanism 300 is controlled by the controller to cut the cotton strips into small cotton balls according to a certain rhythm and install them inside the protective cap;

[0081] S3: The cotton feeding mechanism 600 is controlled by the controller to blow the cotton ball into the cap at a certain rhythm;

[0082] S4: Control the cotton stuffing mechanism 600 / 800 via the controller to push the cotton ball into the bottom of the cap at a certain rhythm.

[0083] S5: Repeat step S4;

[0084] S6: The cotton detection mechanism 110 is controlled by the controller to check whether there is a cotton ball inside the cap according to a certain rhythm;

[0085] S7: The defect rejection mechanism 120 is controlled by the controller, and the defective caps are rejected according to a certain rhythm based on the signal from the cotton detection mechanism 110.

[0086] S8: The feeding mechanism 130 is controlled by the controller to move the protective cap from the base 701 to the receiving hopper according to a certain rhythm.

[0087] Furthermore, prior to step S1, the protective cap is installed on the base by the protective cap feeding mechanism 200;

[0088] Furthermore, after step S2, the strip of cotton is cut into small cotton balls by a cylinder-driven scissors, and the cotton balls are automatically dropped into the cap through a conical guide hole.

[0089] Furthermore, prior to step S3, the cotton ball is blown into the inside of the protective cap using compressed gas;

[0090] Furthermore, in step S4, the cotton ball is pushed to the bottom of the cap by inserting the push rod into the cap;

[0091] Furthermore, before step S6, a detection rod is used to detect whether there is a cotton ball inside the cap;

[0092] Furthermore, after step S7, the caps without cotton balls are removed by the defect rejection mechanism 120;

[0093] Furthermore, after step S8, the qualified protective caps are automatically fed out via the feeding baffle 131.

[0094] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

[0095] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. An automatic wiper with a needle cap exchange machine characterized by, The utility model relates to a kind of cotton plug-in cap machine, including: Frame, for installing prime mover and working machine or executing mechanism; Rotary member is equipped on the frame, and the edge of the rotary member is equipped with several groups of pedestal; The frame outside the rotary member is sequentially surrounded with cap loading mechanism, cotton loading mechanism, cotton into cap mechanism, cotton inserting mechanism, cotton detection mechanism, defect rejection mechanism, unloading mechanism; The rotary member is used to realize the intermittent motion of several groups of caps, and cooperate with executing mechanism to realize each assembly step in the process of cotton inserting into cap; The cap loading mechanism installs cap on pedestal according to intermittent rhythm; The cotton loading mechanism cuts small cotton group from strip-shaped cotton and fills into cap according to intermittent rhythm; The cotton loading mechanism includes cotton loading support, the upper end of the cotton loading support is equipped with arc-shaped guide piece, the lower end of the arc-shaped guide piece is equipped with a pair of feeding rollers, the both ends of each feeding roller is installed in the cotton loading support by bearing support, a gear is respectively arranged at the corresponding end of a pair of feeding rollers, a pair of gears are meshed, a belt wheel is arranged at the other end of one of the feeding rollers, the cotton loading support is equipped with servo motor, the output end of the servo motor is equipped with belt wheel, and two belt wheels are connected by belt; A detachable scissors is arranged below a pair of feeding rollers, rivet part of the scissors is installed in mounting block, the mounting block is arranged on the cotton loading support by mounting support, the mounting support is equipped with guide slot, the mounting block can slide in the guide slot and be locked by jackscrew; Scissors cutting cylinder is arranged on the side of the scissors close to rotary member, the piston rod of the scissors cutting cylinder is connected with one blade of the scissors by connecting piece, the scissors is opened or closed by the scissors cutting cylinder, and strip-shaped cotton is cut into small cotton group and inserted into cap; The scissors cutting cylinder is installed on the cotton loading support by scissors cutting support, the scissors cutting support is also equipped with linear guide rail, the piston rod of the scissors cutting cylinder is connected with the linear guide rail, the linear guide rail is connected with one blade of the scissors, and the scissors is opened or closed by the linear guide rail; At least two cotton material discs are arranged on the frame away from the rotary member side of the cotton loading support, and finished product cotton disc can be placed on the cotton material disc; The cotton into cap mechanism blows cotton group into cap according to intermittent rhythm by gas; The cotton inserting mechanism pushes cotton group into the bottom of cap according to intermittent rhythm by push rod; The cotton detection mechanism detects whether cotton group is in cap according to intermittent rhythm by detection rod; The defect rejection mechanism rejects defective cap according to intermittent rhythm by rejection shift plate; The unloading mechanism makes cap separate from pedestal according to intermittent rhythm by unloading baffle; The frame is also equipped with driving mechanism, and the driving mechanism drives the intermittent motion of the rotary member; The frame is also equipped with controller, and the controller receives feedback information of sensor and sends action instruction to prime mover and working machine or executing mechanism.

2. The automatic plugging machine of the exchange needle cap according to claim 1, characterized in that, The driving mechanism comprises a driving motor arranged in the frame and a speed reducer, an output shaft of the driving motor is connected with an input end of the speed reducer, an output end of the speed reducer is connected with an input end of the indexer, and an output end of the indexer is connected with the rotating member.

3. The automatic plugging machine of claim 1, wherein, The base is an arc-shaped notch arranged on the rotating member, and an arc-shaped stop ring is arranged on the edge of the rotating member.

4. The automatic plugging machine of the exchange needle cap according to claim 1, characterized in that, The rotating member corresponding to each group of the base is provided with a guide mechanism, the guide mechanism comprises a guide block and a support block, the support block is a right-angle plate structure, the support block is fixed on the rotating member, and a through hole corresponding to the base is arranged on the support block; the support block is provided with a guide block, the guide block is provided with a guide hole penetrating through the body, the guide hole is a tapered hole, and the guide hole is connected with the through hole.

5. The automatic plugging machine of the exchange needle cap according to claim 1, characterized in that, At least two line grooves are arranged on the outer periphery of each feeding roller, and one line groove of one feeding roller is paired with one line groove of another feeding roller, so that the cotton thread moves along the pair of line grooves.

6. The automatic plugging machine of the exchange needle cap according to claim 1, characterized in that, A wire bundle plate is arranged on the bearing support and crosses above the feeding roller, and at least two wire bundle holes are arranged on the wire bundle plate.

7. The automatic plugging machine of the exchange needle cap according to claim 1, characterized in that, The shearing cylinder is installed on the cotton feeding support through a shearing support, the shearing support is rotatably sleeved on a screw rod, the cotton feeding support is provided with a mounting plate, the mounting plate is provided with a mounting hole, the screw rod penetrates through the mounting hole, and the screw rod is locked on the mounting plate through a nut.

8. The automatic plugging machine of claim 4, wherein, The cotton cap feeding mechanism comprises a cotton cap feeding support, a cotton cap feeding cylinder is arranged on the cotton cap feeding support, a cotton cap feeding connecting plate is arranged on a driving shaft of the cotton cap feeding cylinder, two air holes are arranged on the cotton cap feeding connecting plate, an electromagnetic valve is installed on the air hole, an output end of the electromagnetic valve is communicated with the air hole, an input end of the electromagnetic valve is connected with compressed air through an air pipe, and a lower end surface of the cotton cap feeding connecting plate is matched with an upper end surface of the guide block.

9. A method of plugging according to the automatic plugger of needle protector cap exchange according to any one of claims 1 to 8, characterized in that, The method comprises the following steps: S1: controlling the cap feeding mechanism by the controller to install the cap on the base through the cap feeding mechanism according to a certain rhythm and rotate the cap through the rotating member; S2: controlling the cotton feeding mechanism by the controller to cut the cotton thread into small cotton groups according to a certain rhythm and install the cotton groups in the cap; S3: controlling the cotton cap feeding mechanism by the controller to blow the cotton groups into the cap according to a certain rhythm; S4: controlling the cotton inserting mechanism by the controller to push the cotton groups into the bottom of the cap according to a certain rhythm; S5: repeating step S4; S6: controlling the cotton detection mechanism by the controller to detect whether the cap has the cotton group according to a certain rhythm; S7: controlling the defect removing mechanism by the controller to remove the cap with defects according to a certain rhythm through the signal of the cotton detection mechanism; S8: controlling the discharging mechanism by the controller to move the cap from the base to the receiving hopper according to a certain rhythm.

10. The cotton inserting method of the automatic cotton inserting machine for exchanging needle caps according to claim 9, characterized in that, In the S2 step, the strip-shaped cotton rod is cut into small pieces of cotton by a cylinder-driven scissor, and the cotton is automatically dropped into the cap through a conical guide hole.

11. A method of plugging according to claim 9, wherein, In the S3 step, the cotton is blown into the cap by compressed gas.

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