Automatic cotton plugging machine and cotton plugging method for exchange needle protective cap

Abstract

The invention relates to an automatic cotton plugging machine for an exchange needle protective cap and a cotton plugging method, and the machine comprises a rack which is used for installing a prime motor and a working machine or an execution mechanism; a rotating part is arranged on the rack, and a plurality of bases are arranged on the edge of the rotating part; a protective cap feeding mechanism, a cotton feeding mechanism, a cotton cap feeding mechanism, a cotton plugging mechanism, a cotton detecting mechanism, a defect removing mechanism and a discharging mechanism are sequentially arranged on the rack on the outer side of the rotating part in a surrounding manner; the rotary part is used for achieving intermittent movement of a plurality of sets of protective caps and is matched with the executing mechanism to achieve all assembling steps in the process that cotton balls are stuffed into the protective caps, the mechanisms are sequentially arranged on the rack on the periphery of the rotary disc in a surrounding mode, and in the intermittent movement process of the rotary disc, all the mechanisms can synchronously achieve the corresponding assembling steps. And the whole automatic cotton filling process can be continuously realized.

Description

Technical Field

[0001] The invention relates to the technical field of medical device manufacturing, and in particular to an automatic cotton plugging machine and a cotton plugging method for exchanging needle protective caps. Background Art

[0002] At present, syringes are often used in the field of testing and treatment. For example, when a person or an animal is sick, drugs are often injected into the person or animal through a syringe for treatment. The injection needle on the syringe is an indispensable part of the entire tool. The drug is injected into the human or animal body through the needle installed on the injection needle. An exchange needle for a syringe includes a needle, a needle seat, a sheath, and a protective cap. The needle and the needle seat are riveted together to form a riveted needle, and the riveted needle is installed in the sheath. A buckled protective cap is provided on the sheath to seal the riveted needle in the buckled sheath and protective cap. A cotton ball is stuffed at the bottom of the protective cap to protect the needle tip of the needle. The existing method generally involves manually cutting the cotton strips into small pieces of cotton balls, then manually stuffing the cotton balls into the protective cap, and stuffing the cotton balls into the bottom of the protective cap through a tamping rod, which increases the input of manual labor. If the operation is not careful, it is also easy to cause the phenomenon that the cotton balls are not put in. Summary of the invention

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

[0004] To achieve the above purpose, the technical solution of the present invention is to design an automatic cotton plugging machine for exchanging needle caps, which is characterized by comprising: A frame for mounting a prime mover and a working machine or an actuator; The frame is provided with a rotating member, and the edge of the rotating member is provided with a plurality of groups of bases; The frame outside the rotating part is provided with a cap feeding mechanism, a cotton feeding mechanism, a cotton cap feeding mechanism, a cotton plugging mechanism, a cotton detecting mechanism, a defect removing mechanism, and a feeding mechanism in sequence; The rotating part is used to realize the intermittent movement of several groups of protective caps, and cooperates with the actuator to realize various assembly steps in the process of stuffing cotton into the protective caps; The needle seat feeding mechanism installs the protective cap on the base according to the intermittent beat; The cotton feeding mechanism cuts the cotton strips into small cotton balls according to the intermittent beat and fills the cotton balls into the protective cap; The cotton feeding mechanism blows the cotton ball into the protective cap according to intermittent beats; The cotton plugging mechanism pushes the cotton ball into the bottom of the protective cap through a push rod according to intermittent beats; The cotton detection mechanism detects whether there is a cotton ball in the protective cap through a detection rod according to intermittent beats; The defective removal mechanism removes defective protective caps through a removal shift plate according to an intermittent beat; The unloading mechanism is configured to separate the protective cap from the base through the unloading baffle plate according to intermittent beats; The frame is also provided with a driving mechanism, which drives the rotating member to perform intermittent motion; The frame is also provided with a controller, which receives feedback information from the sensor and issues action instructions to the prime mover and the working machine or the actuator.

[0005] The driving mechanism includes a driving motor and a reducer arranged in the frame, the output shaft of the driving 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 member.

[0006] A further preferred technical solution is that the base is an arc-shaped notch opened on the rotating member, and an arc-shaped retaining ring is provided on the edge of the rotating member.

[0007] A further preferred technical solution is that a guide structure is provided on the rotating part corresponding to each group of the bases, the guide mechanism includes a guide block and a support block, the support block is a right-angle plate structure, the support block is fixed on the turntable, the support block is provided with through holes corresponding to the bases one by one; the support block is provided with a guide block, the guide block is provided with a guide hole passing through the body, the guide hole is a conical hole, and the guide hole is connected to the through hole.

[0008] A further preferred technical solution is that the cotton feeding mechanism comprises a cotton feeding bracket, an arc-shaped guide piece is provided at the upper end of the cotton feeding bracket, a pair of feed rollers are provided at the lower end of the arc-shaped guide piece, both ends of each feed roller are installed on the cotton feeding bracket through a bearing bracket, a gear is provided at the corresponding ends of a pair of feed rollers, a pair of gears are meshed and connected, a pulley is provided at the other end of one of the feed rollers, the cotton feeding bracket is provided with a servo motor, a pulley is provided at the output end of the servo motor, and the two pulleys are connected by a belt; A further preferred technical solution is that a detachable pair of scissors is provided below a pair of the feed rollers, the rivet portion of the scissors is installed on a mounting block, the mounting block is arranged on the cotton feeding bracket through a mounting support, the mounting support is provided with a guide groove, the mounting block can slide in the guide groove and be locked by a top screw.

[0009] A shearing cylinder is provided on one side of the scissors close to the rotary disk, and a piston rod of the shearing cylinder is connected to a blade of the scissors through a connecting piece. The scissors are driven to open or close by the shearing cylinder, and the strip-shaped cotton strips are sheared into small cotton balls and stuffed into the protective cap; 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 a blade of the scissors, and the scissors are driven to open or close through the linear guide rail; A further preferred technical solution is that at least two cotton material trays are provided on the frame of the cotton feeding bracket on the side away from the rotary disk, and finished sliver trays can be placed on the cotton material trays.

[0010] A further preferred technical solution is that at least two wire grooves are opened on the outer circumference of each feed roller, and a wire groove of one feed roller is paired with a wire groove of another feed roller, so that the cotton thread moves in a directed manner along a pair of wire grooves.

[0011] A further preferred technical solution is that a harness plate is provided on the bearing bracket and spans above the feed roller, and at least two harness holes are provided on the harness plate.

[0012] A further preferred technical solution is that the shear cylinder is installed on the cotton feeding bracket through a shear support, the shear support is rotatably mounted on a screw rod, the cotton feeding bracket is provided with a mounting plate, the mounting plate is provided with a mounting hole, the screw rod passes through the mounting hole, and is locked on the mounting plate by a nut.

[0013] A further preferred technical solution is that the cotton cap-entering mechanism includes a cotton cap-entering bracket, a cotton cap-entering cylinder is provided on the cotton cap-entering bracket, a cotton cap-entering connecting plate is provided on the driving shaft of the cotton cap-entering cylinder, two air holes are provided on the cotton cap-entering connecting plate, an electromagnetic valve is installed on the air hole, the output end of the electromagnetic valve is connected to the air hole, the input end of the electromagnetic valve is connected to compressed air through an air pipe, and the lower end surface of the cotton cap-entering connecting plate matches the upper end surface of the guide block. A cotton plugging method for an automatic cotton plugging machine with a replaceable needle cap comprises the following steps: S1: Controlling the protective cap feeding mechanism through a controller, installing the protective cap on a base through the protective cap feeding mechanism according to a certain beat, and rotating and transferring the protective cap through a rotary disk; S2: Controlling the cotton feeding mechanism through the controller to cut the cotton strips into small cotton balls according to a certain rhythm and install them in the protective cap; S3: controlling the cotton feeding mechanism through a controller to blow the cotton ball into the protective cap at a certain rhythm; S4: Controlling the cotton plugging mechanism through a controller to push the cotton ball into the bottom of the protective cap at a certain rhythm; S5: repeat step S4; S6: Controlling the cotton detection mechanism through the controller to check whether there is a cotton ball in the protective cap according to a certain beat; S7: controlling the defect removal mechanism through the controller, and removing the defective protective caps according to a certain beat according to the signal of the cotton detection mechanism; S8: The unloading mechanism is controlled by a controller to move the protective cap from the base to the receiving hopper at a certain rhythm.

[0014] A further preferred technical solution is that in step S2, the strip-shaped cotton strips are cut into small cotton balls by scissors driven by a cylinder, and the cotton balls are automatically dropped into the protective cap through the conical guide holes.

[0015] A further preferred technical solution is that in step S3, the cotton ball is blown into the interior of the protective cap by compressed gas.

[0016] The advantages and beneficial effects of the present invention are: an automatic cotton plugging machine for syringe caps, any assembly step in the cotton plugging process is realized by a corresponding mechanism, and in order to realize continuous assembly, the mechanisms are continuously arranged on the periphery of the indexer, and during intermittent motion, each mechanism can synchronously realize the corresponding assembly step and continuously realize the entire cotton plugging process.

[0017] Through the cap feeding mechanism, cotton feeding mechanism, cotton cap insertion mechanism, cotton plugging mechanism, cotton detection mechanism, defect removal mechanism, and unloading mechanism, in order to realize continuous assembly, the above-mentioned mechanisms are arranged in sequence on the frame around the turntable. During the intermittent movement of the turntable, each mechanism can synchronously realize the corresponding assembly steps, and can continuously realize the entire automatic cotton plugging process.

[0018] The strip-shaped cotton strips are cut into small cotton balls through a cotton feeding mechanism and stuffed into the protective cap. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is an axonometric diagram of the present invention; Figure 2 For the present invention Figure 1 A top view of Figure 3 It is an axonometric diagram of the present invention without a controller; Figure 4 This is one of the axonometric views of the cotton feeding mechanism of the present invention; Figure 5 This is the second axonometric diagram of the cotton feeding mechanism of the present invention; Figure 6 It is a partial axonometric diagram of the present invention; Figure 7 This is the axonometric view of the protective cap. DETAILED DESCRIPTION

[0020] The specific implementation of the present invention is further described below in conjunction with the accompanying drawings and embodiments. The following embodiments are only used to more clearly illustrate the technical solution of the present invention, and cannot be used to limit the protection scope of the present invention.

[0021] like Figure 1-6 As shown, an automatic cotton plugging machine for an exchange needle cap, the exchange needle comprises a needle, a needle seat, a sheath, and a cap. The needle and the needle seat are riveted together to form a riveted needle, the riveted needle is installed in the sheath, and the sheath is provided with a snap-fitting cap, the riveted needle is sealed in the snap-fitted sheath and cap, the bottom of the cap is stuffed with cotton balls to protect the needle tip of the needle, in order to achieve automatic cotton plugging in the cap, the present invention provides an automatic cotton plugging machine for syringe caps, any assembly step in the corresponding cotton plugging process is achieved by a corresponding mechanism, and in order to achieve continuous assembly, the mechanisms are continuously arranged on the periphery of the indexer 902, so that each mechanism can be synchronously realized during intermittent motion. The corresponding assembly steps can continuously realize the whole cotton plugging process. Specifically, an automatic cotton plugging machine for syringe caps includes a frame 100, which is a box-type frame. A divider 902 is provided on the frame 100. Intermittent motion is realized through the divider 902 to realize continuous feeding. At the same time, different mechanisms can synchronously realize their respective corresponding assembly steps, and finally the cotton ball is stuffed into the cap. A driving motor 901 and a reducer are provided in the frame 100. The output shaft of the driving 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 divider 902. The reducer is used to match the rotation speed and transmit torque between the prime mover and the working machine or the actuator.

[0022] like Figure 1-6As shown, the output end of the indexer 902 is connected to a rotating disk 700, and the rotating disk 700 is provided with a plurality of groups of bases 701. The number of groups of bases 701 is related to the cotton plugging steps. Generally, one cotton plugging step corresponds to one group of bases 701. In order to adjust the assembly frequency and match the intermittent beat of the indexer 902, a group of bases 701 may be provided between two assembly steps for transition, or two or more groups of bases 701 may be provided in one assembly step to realize the corresponding assembly steps. In this embodiment, eight groups of bases 701 are provided on the rotating disk 700, and eight The bases 701 of the group are arranged in a ring near the edge of the rotating disk 700, and each group includes at least two bases 701. The two bases 701 of any group are arranged at equal intervals. The bases 701 are mainly used for carrying and transferring the protective caps. The bases 701 are arranged on the rotating disk 700 and rotate with the rotating disk 700 to transfer the protective caps to the corresponding workstations of the corresponding assembly steps, and finally the cotton balls are stuffed into the protective caps. Finally, the protective caps stuffed with cotton are unloaded to realize the empty position of the base 701, and then rotated to the protective cap feeding mechanism 200 for protective cap feeding, and the cycle is continuous; A controller 400 is disposed on the frame 100 at one side of the turntable 700 . The controller 400 is a PLC or MCU controller. The controller 400 receives sensor instructions and sends action instructions to the actuator.

[0023] like Figure 1-6 As shown, in order to ensure that the protective cap can be stably placed on the base 701 and is not easy to fall off during the rotation of the turntable 700, a base 701 is provided in the present embodiment, and the base 701 is an arc-shaped notch directly opened on the turntable 700, and the outer periphery of the protective cap has a circle of convex rings; the convex ring is placed on the arc-shaped notch so that the protective cap is suspended on the edge of the turntable 700, and an arc-shaped retaining ring 702 is provided on the edge of the turntable 700, and the arc-shaped retaining ring 702 is arranged along the edge of the turntable 700. When the protective cap is placed on the arc-shaped notch, it may fall off from the arc-shaped notch at any time, and the protective cap is restricted in the arc-shaped notch by the arc-shaped retaining ring 702. The arc-shaped retaining ring 702 is supported on the edge of the turntable 700 by a group of support rods 703. The length of the arc-shaped retaining ring 702 is adjusted according to the structure, generally at the position corresponding to the blanking, the arc-shaped retaining ring 702 has an opening to enable the protective cap to be separated from the arc-shaped notch.

[0024] In order to realize that the cotton ball automatically falls into the protective cap, a guide structure 140 is provided on the rotating disk 700 corresponding to each group of the base 701, and the guide mechanism 140 includes a guide block 141 and a support block 142. The support block 142 is a right-angle plate structure, and 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 rotating disk 700. The support block 142 is fixed on the rotating disk 700, and the support block 141 is provided on the rotating disk 700. A through hole is provided on 42 corresponding to the base 701 one by one; a guide block 141 is provided on the support block 142, and the guide block 141 is provided with a guide hole 143 penetrating the body, and the guide hole 143 is a conical hole, and the guide hole 143 is connected to the through hole. The cotton ball falls into the guide hole 143, and 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.

[0025] like Figure 1 As shown, the cotton plugging process at least includes protective cap loading, cotton loading, cotton insertion, cotton plugging, cotton detection, defect removal, and unloading; corresponding to any assembly step in the cotton plugging process, a corresponding mechanism needs to be set to realize the corresponding assembly step, and the frame at least includes a protective cap loading mechanism 200, a cotton loading mechanism 300, a cotton insertion mechanism 500, a cotton plugging mechanism 600 / 800, a cotton detection mechanism 110, a defect removal mechanism 120, and an unloading mechanism 130. At the same time, in order to realize continuous assembly, the above-mentioned mechanisms are arranged in sequence on the frame 100 around the turntable 700. During the intermittent movement of the turntable 700, each mechanism can synchronously realize the corresponding assembly step, and can continuously realize the entire automatic cotton plugging process.

[0026] In the dynamic process, the base 701 intermittently progresses from the position of the first group in the static state to the position of the eighth group, and rotates in a continuous cycle.

[0027] In this embodiment, the corresponding specific mechanism and the base 701 are described in detail in a static state, specifically; like Figure 1-6 As shown, the cap feeding mechanism 200 is arranged on the frame 100 outside the turntable 700 corresponding to the first group of bases, and the cap feeding mechanism 200 includes a cap vibrating plate, and the cap vibrating plate adjusts the caps to be fed in the same state with the open end facing upward, and the cap discharge end of the cap vibrating plate is provided with an inclined cap receiving plate 201, and the cap receiving plate 201 is provided with a group of cap receiving troughs, and the caps directly fall into the first group of bases along the inclined cap receiving troughs.

[0028] The protective cap vibration plate can adopt the vibration plate structure of the safety syringe needle seat feeding device disclosed in Publication (Announcement) No.: CN217894276U, or the vibration plate used for directional sorting and conveying of injection needle seats disclosed in Publication (Announcement) No.: CN112093428A, or the vibration plate structure of an automatic directional feeding machine for blood collection needle hard seats disclosed in Publication (Announcement) No.: CN105109931A, as long as the structure of the material channel is matched with the shape of the protective cap.

[0029] The cotton feeding mechanism 300 is arranged on the frame 100 outside the turntable 700 corresponding to the second base of the second group, and the cotton feeding mechanism 300 includes a cotton feeding bracket 310, and the upper end of the cotton feeding bracket 310 is provided with an arc guide piece 302, and the lower end of the arc guide piece 302 is provided with a pair of feed rollers 312, and the two ends of each of the feed rollers 312 are installed on the cotton feeding bracket 310 through a bearing bracket 313, and a gear 316 is respectively provided at the corresponding ends of a pair of the feed rollers 312, and the pair of the gears 316 are meshed and connected, and a pulley is provided at the other end of one of the feed rollers 312, and the cotton feeding bracket 310 is provided with a servo motor 315, and the output end of the servo motor 315 is provided with a pulley, and the two pulleys are connected by a belt 314.

[0030] In order to ensure that the cotton threads can be accurately docked with the guide mechanism 140, at least two thread grooves are opened on the outer circumference of each feed roller 312. A thread groove of one feed roller 312 is paired with a thread groove of another feed roller 12, so that the cotton threads can move in a directed manner along a pair of thread grooves, thereby preventing the threads from swinging on the pair of feed rollers 312.

[0031] A harness plate 303 is provided on the bearing bracket 313 and spans above the feed roller 312. The harness plate 303 is provided with at least two harness holes 304. The cotton thread passes through the arc guide plate 302, then passes through the corresponding harness holes 304, and then enters the wire grooves of the corresponding pair of feed rollers 312, and is fed intermittently under the drive of the servo motor.

[0032] A detachable pair of scissors 311 is provided below a pair of the feed rollers 312. The rivet portion of the scissors 311 is installed on a mounting block 317. The mounting block 317 is arranged on the cotton feeding bracket 310 through a mounting support 318. A guide groove is provided on the mounting support 318. The mounting block 317 can slide in the guide groove and be locked by a top screw. In this way, the position of the blade of the scissors 311 to cut the cotton strips can be adjusted to make the cutting of the cotton strips smoother.

[0033] A shearing cylinder 308 is provided on one side of the scissors 311 close to the turntable 700. The piston rod of the shearing cylinder 308 is connected to a blade of the scissors 311 through a connecting piece. The scissors 311 are driven to open or close by the shearing cylinder 308 to cut the strip-shaped cotton strips into small pieces and insert them into the protective cap.

[0034] The shearing cylinder 308 is installed on the cotton feeding bracket 310 through a shearing support 307. The shearing support is rotatably mounted on a screw rod 306. The cotton feeding bracket 100 is provided with a mounting plate 307. The mounting plate 307 is provided with a mounting hole. The screw rod 306 passes through the mounting hole and is locked on the mounting plate 307 by a nut 305. In this way, the distance between the shearing cylinder 308 and the scissors 311 can be adjusted by adjusting the rotation of the screw rod 306 to adapt to the stroke of the shearing cylinder 308.

[0035] The shear support is also provided with a linear guide rail 309, the piston rod of the shear cylinder 308 is connected to the guide rail of the linear guide rail 309, and the guide rail is connected to a blade of the scissors 311, and the scissors 311 are driven to open or close through the linear guide rail 309 At least two cotton material trays 301 are provided on the frame 100 at a side of the cotton feeding support 310 away from the rotary disk 700 , and finished sliver trays can be placed on the cotton material trays 301 .

[0036] The cotton cap-introduction mechanism 500 is arranged on the frame 100 outside the rotary disk 700 corresponding to the third group of bases, and the cotton cap-introduction mechanism 500 includes a cotton cap-introduction bracket, a cotton cap-introduction cylinder is arranged on the cotton cap-introduction bracket, a cotton cap-introduction connecting plate 501 is arranged on the piston rod of the cotton cap-introduction cylinder, two air holes 502 are arranged on the cotton cap-introduction connecting plate 501, and a solenoid valve is installed on the air hole 502, and the output end of the solenoid valve is connected with the air hole, and the input end of the solenoid valve is connected with compressed air through an air pipe, and the lower end surface of the cotton cap-introduction connecting plate 501 matches the upper end surface of the guide block 141, when the cotton cap-introduction cylinder is at the minimum stroke, the lower end surface of the cotton cap-introduction connecting plate 501 is in contact with the upper end surface of the guide block 141, and the cotton ball is blown into the protective cap by gas, and when the cotton cap-introduction cylinder is at the maximum stroke, the lower end surface of the cotton cap-introduction connecting plate 501 is separated from the upper end surface of the guide block 141; The first cotton plugging mechanism is arranged on the frame 100 outside the turntable 700 corresponding to the fourth group of bases, and the first cotton plugging mechanism includes a cotton plugging bracket 601 / 801, and the cotton plugging bracket 601 / 801 is provided with a cotton plugging cylinder 602 / 802, and the piston rod of the cotton plugging cylinder 602 / 802 is provided with a cotton plugging connecting plate 603 / 803, and the cotton plugging connecting plate 603 / 803 is provided with two push rods 604 / 804, and the push rods 604 / 804 push the cotton ball in the protective cap into the bottom of the protective cap.

[0037] Since the cotton ball is relatively soft, in order to ensure that the cotton ball is stuffed into the protective cap, a second cotton plugging mechanism is further provided on the frame 700 to continuously push the cotton ball. The second cotton plugging mechanism is arranged on the frame 100 outside the turntable 700 corresponding to the fifth group of bases. The second cotton plugging mechanism includes a cotton plugging bracket 601 / 801, and a cotton plugging cylinder 602 / 802 is provided on the cotton plugging bracket 601 / 801. A cotton plugging connecting plate 603 / 803 is provided on the driving shaft of the cotton plugging cylinder 602 / 802. Two push rods 604 / 804 are provided on the cotton plugging connecting plate 603 / 803. The push rods 604 / 804 push the cotton ball in the protective cap into the bottom of the protective cap.

[0038] The cotton detection mechanism 110 is arranged on the frame 100 outside the turntable 700 corresponding to the sixth group of bases, and the cotton detection mechanism 110 includes a cotton detection bracket 111, and a detection cylinder 112 is provided on the cotton detection bracket 111. The piston rod of the detection cylinder 112 is provided with a detection connecting plate 113, and at least two detection rods are provided on the detection connecting plate 113. A photoelectric sensor is provided on each of the detection rods, and the detection rod is extended into the protective cap, and then the photoelectric sensor detects whether there is a cotton ball in the sheath.

[0039] The defect rejection mechanism 120 is arranged on the frame 100 outside the rotating disk 700 corresponding to the seventh group of bases, and the defect rejection mechanism 120 includes a defect rejection bracket 121, and the defect rejection bracket 121 is provided with at least two rejection cylinders 122, and the piston rod of each of the rejection cylinders 122 is connected to a rejection shift plate 123, and the rejection shift plate 123 is arranged on the outside of the rotating disk 700. A waste hopper 124 is arranged on the outside of the rotating disk 700 below the defect rejection mechanism 120, and the defect rejection mechanism 120 rejects the defective protective caps to In the waste hopper 124, the base forms an empty space, and then performs an intermittent rotation cycle. If there is no cotton ball in 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, and controls the operation of the rejection cylinder 122 respectively, so that the piston rod of the rejection cylinder 122 is contracted, and the rejection shift plate 123 is moved away from the rotary disk 700. Since the protective cap is not resisted by the rejection shift plate 123, the protective cap falls off from the arc-shaped notch and automatically falls into the waste hopper 124; In another embodiment, the defect rejection mechanism 290 can also use a mechanical arm with a rejection clamping cylinder to unload the material, and the protective cap is taken out from the base by the mechanical arm. The mechanical arm moves the rejection clamping cylinder to the top of the waste hopper 124, and then the rejection clamping cylinder opens the protective cap and automatically falls into the waste hopper 124; like Figure 1-6 As shown, the unloading mechanism 130 is arranged on the frame 100 outside the turntable 700 corresponding to the eighth group of bases, and the unloading mechanism 130 includes a unloading bracket, and the unloading bracket is provided with a unloading baffle 131. Specifically, the unloading baffle 131 has an inclined baffle edge connected with the outer edge of the turntable 700, and the protective cap falls off from the arc-shaped notch along the baffle edge during the rotation process.

[0040] An inclined receiving hopper 132 is also provided on the frame 100 outside the unloading mechanism 130 , and the protective cap falls into the receiving hopper 132 .

[0041] How to insert cotton: S1: The protective cap feeding mechanism 200 is controlled by a controller, the protective cap is installed on the base 701 according to a certain rhythm through the protective cap feeding mechanism 200 and the protective cap is rotated and transferred through the rotary disk 700; S2: The controller controls the cotton feeding mechanism 300 to cut the cotton strips into small cotton balls according to a certain rhythm and install them in the protective cap; S3: The controller controls the cotton feeding mechanism 600 to blow the cotton balls into the protective cap at a certain rhythm; S4: The cotton plugging mechanism 600 / 800 is controlled by a controller to push the cotton ball into the bottom of the protective cap at a certain rhythm.

[0042] S5: repeat step S4; S6: Controlling the cotton detection mechanism 110 through the controller to check whether there is a cotton ball in the protective cap according to a certain beat; S7: Controlling the defect removal mechanism 120 through the controller, and removing the defective protective caps according to a certain beat according to the signal of the cotton detection mechanism 110; S8: The unloading 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.

[0043] Furthermore, before step S1, the protective cap is installed on the base by a protective cap feeding mechanism 200; Furthermore, after step S2, the scissors are driven by the cylinder to cut the strips of cotton into small pieces of cotton balls, and the cotton balls are automatically dropped into the protective cap through the conical guide holes; Furthermore, before step S3, the cotton ball is blown into the interior of the protective cap by compressed gas; Further, in step S4, the push rod is inserted into the protective cap to push the cotton ball to the bottom of the protective cap; Furthermore, before step S6, whether there is a cotton ball in the protective cap is detected by a detection rod; Furthermore, after step S7, the protective caps without cotton balls are removed by the defect removal mechanism 120; Furthermore, after step S8, qualified protective caps are automatically unloaded through the unloading baffle 131.

[0044] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

[0045] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. An automatic cotton plugging machine for exchanging needle caps, characterized in that: include: A frame for mounting a prime mover and a working machine or an actuator; The frame is provided with a rotating member, and the edge of the rotating member is provided with a plurality of groups of bases; The frame outside the rotating part is provided with a cap feeding mechanism, a cotton feeding mechanism, a cotton cap feeding mechanism, a cotton plugging mechanism, a cotton detecting mechanism, a defect removing mechanism, and a feeding mechanism in sequence; The rotating part is used to realize the intermittent movement of several groups of protective caps, and cooperates with the actuator to realize various assembly steps in the process of stuffing cotton into the protective caps; The protective cap feeding mechanism installs the protective cap on the base according to the intermittent beat; The cotton feeding mechanism cuts the cotton strips into small cotton balls according to the intermittent beat and fills the cotton balls into the protective cap; The cotton feeding mechanism blows the cotton ball into the protective cap through gas according to intermittent beats; The cotton plugging mechanism pushes the cotton ball into the bottom of the protective cap through a push rod according to intermittent beats; The cotton detection mechanism detects whether there is a cotton ball in the protective cap through a detection rod according to intermittent beats; The defective removal mechanism removes defective protective caps through a removal shift plate according to an intermittent beat; The unloading mechanism, according to intermittent beats, causes the protective cap to be separated from the base through the unloading baffle; The frame is also provided with a driving mechanism, which drives the rotating member to perform intermittent motion; The frame is also provided with a controller, which receives feedback information from the sensor and issues action instructions to the prime mover and the working machine or the actuator.

2. The automatic cotton plugging machine for exchanging needle caps according to claim 1, characterized in that: The driving mechanism includes a driving motor and a reducer arranged in the frame, the output shaft of the driving 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 member.

3. The automatic cotton plugging machine for exchanging needle caps according to claim 1, characterized in that: The base is an arc-shaped notch opened on the rotating member, and an arc-shaped retaining ring is arranged on the edge of the rotating member.

4. The automatic cotton plugging machine for exchanging needle caps according to claim 1, characterized in that: A guide structure is provided on the rotating part corresponding to each group of the bases, and the guide mechanism includes a guide block and a support block. The support block is a right-angle plate structure, and the support block is fixed on the turntable. The support block is provided with through holes corresponding to the bases one by one; the support block is provided with a guide block, and the guide block is provided with a guide hole passing through the body, and the guide hole is a conical hole, and the guide hole is connected to the through hole.

5. The automatic cotton plugging machine for exchanging needle caps according to claim 1, characterized in that: The cotton feeding mechanism comprises a cotton feeding bracket, an arc-shaped guide piece is provided at the upper end of the cotton feeding bracket, a pair of feed rollers are provided at the lower end of the arc-shaped guide piece, both ends of each feed roller are installed on the cotton feeding bracket through a bearing bracket, a gear is provided at the corresponding ends of a pair of feed rollers, a pair of gears are meshed and connected, a pulley is provided at the other end of one of the feed rollers, a servo motor is provided, a pulley is provided at the output end of the servo motor, and the two pulleys are connected by a belt; A detachable scissors is provided below a pair of the feed rollers, the rivet portion of the scissors is mounted on a mounting block, the mounting block is arranged on the cotton feeding bracket via a mounting support, the mounting support is provided with a guide groove, the mounting block can slide in the guide groove and be locked by a top screw; A shearing cylinder is provided on one side of the scissors close to the rotary disk, and a piston rod of the shearing cylinder is connected to a blade of the scissors through a connecting piece. The scissors are driven to open or close by the shearing cylinder, and the strip-shaped cotton strips are sheared into small cotton balls and stuffed into the protective cap; 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 a blade of the scissors, and the scissors are driven to open or close through the linear guide rail; At least two cotton material trays are arranged on the frame at the side of the cotton feeding support away from the rotary disk, and finished cotton strip trays can be placed on the cotton material trays.

6. The automatic cotton plugging machine for exchanging needle caps according to claim 5, characterized in that: At least two wire grooves are formed on the outer circumference of each feed roller, and a wire groove of one feed roller is matched with a wire groove of another feed roller, so that the cotton thread moves in a directional manner along a pair of wire grooves.

7. The automatic cotton plugging machine for exchanging needle caps according to claim 5, characterized in that: A harness plate is provided on the bearing bracket and spans above the feed roller, and at least two harness holes are provided on the harness plate.

8. The automatic cotton plugging machine for exchanging needle caps according to claim 5, characterized in that: The shearing cylinder is installed on the cotton feeding bracket through a shearing support, and the shearing support is rotatably sleeved on a screw rod. The cotton feeding bracket is provided with a mounting plate, and the mounting plate is provided with a mounting hole. The screw rod passes through the mounting hole and is locked on the mounting plate by a nut.

9. The automatic cotton plugging machine for exchanging needle caps according to claim 1, characterized in that: The cotton-cap-entering mechanism includes a cotton-cap-entering bracket, a cotton-cap-entering cylinder is provided on the cotton-cap-entering bracket, a cotton-cap-entering connecting plate is provided on the driving shaft of the cotton-cap-entering cylinder, two air holes are provided on the cotton-cap-entering connecting plate, an electromagnetic valve is installed on the air hole, the output end of the electromagnetic valve is connected to the air hole, the input end of the electromagnetic valve is connected to compressed air through an air pipe, and the lower end surface of the cotton-cap-entering connecting plate matches the upper end surface of the guide block.

10. A cotton plugging method for an automatic cotton plugging machine for exchanging needle caps according to any one of claims 1 to 9, characterized in that: The following steps are involved: S1: Controlling the protective cap feeding mechanism through a controller, installing the protective cap on a base through the protective cap feeding mechanism according to a certain beat, and rotating and transferring the protective cap through a rotary disk; S2: Controlling the cotton feeding mechanism through the controller to cut the cotton strips into small cotton balls according to a certain rhythm and install them in the protective cap; S3: controlling the cotton feeding mechanism through a controller to blow the cotton ball into the protective cap at a certain rhythm; S4: Controlling the cotton plugging mechanism through a controller to push the cotton ball into the bottom of the protective cap at a certain rhythm; S5: repeat step S4; S6: Controlling the cotton detection mechanism through the controller to check whether there is a cotton ball in the protective cap according to a certain beat; S7: controlling the defect removal mechanism through the controller, and removing the defective protective caps according to a certain beat according to the signal of the cotton detection mechanism; S8: The unloading mechanism is controlled by a controller to move the protective cap from the base to the receiving hopper at a certain rhythm.

11. The cotton plugging method of the automatic cotton plugging machine with exchangeable needle caps according to claim 10, characterized in that: In step S2, the scissors are driven by the cylinder to cut the strips of cotton into small pieces of cotton balls, and the cotton balls are automatically dropped into the protective cap through the conical guide holes.

12. The cotton plugging method of the automatic cotton plugging machine with exchangeable needle caps according to claim 10, characterized in that: In step S3, the cotton ball is blown into the interior of the protective cap by compressed gas.

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