CN115108104A

CN115108104A - Automatic packaging machine for four-side seal of medical gloves

Info

Publication number: CN115108104A
Application number: CN202210839131.3A
Authority: CN
Inventors: 王莹莹; 朱瑞炘; 林育亨
Original assignee: ZHEJIANG HONGCHANG MACHINERY CO Ltd
Current assignee: ZHEJIANG HONGCHANG MACHINERY CO Ltd
Priority date: 2022-07-18
Filing date: 2022-07-18
Publication date: 2022-09-27
Anticipated expiration: 2042-07-18
Also published as: CN115108104B

Abstract

The invention relates to the technical field of automatic glove packaging machines, in particular to an automatic medical glove four-side sealing packaging machine. Medical gloves four sides seals automatic packaging machine includes: the fixing frame is arranged on one side of the packaging machine, wherein a negative pressure forming mechanism is fixedly arranged on one end of the fixing frame; the fixed negative pressure cover that is provided with is connected through electric push rod on the mount, and the seat is placed to the fixed finished product that is provided with of transfer line outer wall connection, and negative pressure formation mechanism makes negative pressure cover and finished product place the inside negative pressure that forms when the seat cooperation. According to the invention, the negative pressure forming mechanism and the negative pressure cover are arranged on the packaging machine, so that negative pressure is formed inside the negative pressure cover and the finished product placing seat when the negative pressure cover covers the finished product placing seat, the gas pressure in the packaging bag is greater than the external gas pressure, the packaging bag expands when the edge sealing of the packaging bag is complete, otherwise, a gap exists at the edge sealing position when the packaging bag is not changed, and therefore, unqualified packaging can be detected, and unqualified packaging is prevented from flowing out.

Description

Automatic packaging machine for four-side seal of medical gloves

Technical Field

The invention relates to the technical field of automatic glove packaging machines, in particular to an automatic medical glove four-side sealing packaging machine.

Background

Medical gloves are mainly used for preventing medical staff from being infected, and are suitable for avoiding infection scenes, such as contacting or anticipating infectious substances, such as secretion, excrement, body fluid, blood and the like of patients, or finger breakage of medical staff, and contacting infectious patients; medical personnel are exposed to various operating environments, such as open windows or invasive sterile procedures. Medical gloves need to be packaged during their production,

the semi-permeability and the bacteria resistance of the packaging material are utilized to enable sterilization gas such as EO epoxy ethane or steam to permeate to achieve the sterilization effect, and bacteria are prevented from entering the packaging bag again. The aseptic condition in the bag is ensured before the packaging bag is opened in the storage, transportation and effective period meeting the requirements. Maintaining the sterility of the product. The package has no chance of being contaminated by air, fiber breakage, foreign matter such as dust, and microorganisms. Therefore, the packaging needs to ensure that: including no breakage of the material; complete sealing, proper peeling strength, no permeation, no blasting and clean peeling. A hermetically sealed packaging material for medical devices to be sterilized has a microbial barrier function that prevents the entry of microorganisms and provides aseptic protection to the product for final packaging that is aseptic in use.

Application number is CN211845207U packing plant is used in production of disposable medical gloves through setting up box, conveyer belt, concave plate, safety cover, electronic flexible post, first unreeling roller, second unreeling roller and wind-up roll to reach this packing plant is used in production of disposable medical gloves and have the effect of being convenient for pack medical gloves and collect the leftover bits of packing medical gloves.

But the device still has the weak point to lie in, the device is when using, because when packing medical gloves, can utilize compression equipment to press heating mechanism and carry out the banding around the wrapping bag, the wrapping bag inside of placing medical gloves this moment can have residual gas, at the banding in-process, can lead to the banding to incompletely to have the gap because the temperature is not enough or other influence, and the device is not convenient for in time to the packing that the banding is good to be examined, lead to inside the outside air of the unqualified packing of banding can enter into the wrapping bag, can pollute medical gloves.

Disclosure of Invention

Solves the technical problem

Aiming at the defects in the prior art, the invention provides an automatic packaging machine for four-side sealing of medical gloves, which can effectively solve the problem that the sealed package is inconvenient to check in time in the prior art.

Technical scheme

In order to achieve the purpose, the invention is realized by the following technical scheme:

the invention provides a medical glove four-edge sealing automatic packaging machine, which comprises: the device comprises a fixing frame arranged on one side of the packaging machine, wherein a negative pressure forming mechanism is fixedly arranged on one end of the fixing frame;

the fixed negative pressure cover that is provided with is connected through the electric push rod on the mount, the connection of rotating is provided with the transfer line on the mount, the seat is placed to the fixed finished product that is provided with of transfer line outer wall connection, negative pressure formation mechanism makes negative pressure cover and finished product place the inside negative pressure that forms when the seat cooperation.

Further, negative pressure forming mechanism includes fixed case, fixed case is connected fixedly with the mount and is set up, the inside sliding fit of fixed case is provided with the stripper plate, stripper plate one end is connected fixedly and is provided with the dead lever, fixed case one end inner wall through connection is fixed and is provided with the bellows, bellows lower extreme and negative pressure cover inner wall intercommunication.

Furthermore, the top surface that the mount is located negative pressure forming mechanism is connected fixedly and is provided with driving motor A, driving motor A output end is connected fixedly and is provided with the pole of buckling, it is provided with the connecting rod to rotate the connection on the pole of buckling, the connecting rod other end rotates with the dead lever outer end through the round pin axle and is connected the setting.

Furthermore, the outer wall of the upper end of the transmission rod is fixedly connected with a grooved pulley, and the grooved pulley is movably clamped with a stirring piece connected with the upper end of the bending rod.

Further, the seal groove has all been seted up to terminal surface about the seat is placed to the finished product, the finished product is placed a seat upper end inner wall and is rotated the connection and be provided with the dwang, torsion spring has been cup jointed to the dwang rotation one end outer wall of connecting, the torsion spring other end is placed the interior wall connection of seat with the finished product and is fixed, pressure sensor is installed to the dwang other end.

Further, the opening part at the lower end of the finished product placing seat is connected and provided with a discharging plate in a rotating mode, a sealing strip is fixedly connected onto the discharging plate, one end of the discharging plate is fixedly connected and provided with a worm wheel, and the worm wheel and the finished product placing seat are connected and provided with a worm meshing transmission device in a rotating mode.

Furthermore, the end of the finished product placing seat is fixedly connected with a driving motor B, the output end of the driving motor B is fixedly connected with a gear, the gear is in meshing transmission with a gear shaft connected with the outer end of the worm, and the gear shaft and the fixing frame are in meshing transmission with arc-shaped rack sets which are eccentric and symmetrical up and down.

Further, the bottom surface of the negative pressure cover is fixedly connected with a sealing strip, the outer wall of the lower end of the negative pressure cover is movably inserted into the inner wall of the sealing groove on the upper side of the finished product placing seat, a pressing rod is fixedly connected with the inner wall of the negative pressure cover, and the pressing rod is in sliding contact with the outer wall of the rotating rod.

Advantageous effects

Compared with the known public technology, the technical scheme provided by the invention has the following beneficial effects:

1. according to the invention, the negative pressure forming mechanism and the negative pressure cover are arranged on the packaging machine, so that when the negative pressure cover covers the finished product placing seat, the negative pressure forming mechanism can drive the fixed rod connected with the connecting rod to reciprocate under the action of the driving motor A, so as to drive the extrusion plate connected with the fixed rod to extrude and suck, and thus air in the negative pressure cover and the finished product placing seat can be sucked away, so that negative pressure is formed in the negative pressure cover and the finished product placing seat, at the moment, the air pressure of the air in the packaging bag is greater than the external air pressure, when the edge of the packaging bag is completely sealed, the packaging bag can expand, otherwise, a gap exists at the edge sealing position, so that unqualified packaging can be detected, and unqualified packaging is prevented from flowing out.

2. According to the invention, by arranging the pressure sensor, when the packaging bag expands under negative pressure, the packaging bag is qualified, and the expanded packaging bag extrudes the pressure sensor, so that the pressure sensor can control the driving motor B through an electric signal, the driving motor B drives the worm to rotate, and the worm drives the discharge plate connected with the worm wheel to open, so that the qualified packaging bag can be stored, and the automatic sorting function of the device is realized.

3. According to the invention, by arranging the arc-shaped rack group, the packaging bag is unqualified when the packaging bag is not expanded, and at the moment, when the unqualified packaging bag moves to the arc-shaped rack group, the gear shaft can be meshed with the rack on the upper side in the arc-shaped rack group, so that the worm wheel meshed with the worm is driven to rotate, the discharging plate is opened, the unqualified packaging bag falls out at the moment, the automatic discharging function is realized, and then when the gear shaft is meshed with the rack on the lower side in the arc-shaped rack group, the opened discharging plate is reset, so that the next material receiving is facilitated.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below. It is obvious that the drawings in the following description are only some embodiments of the invention, and that for a person skilled in the art, other drawings can be derived from them without inventive effort.

FIG. 1 is a schematic view of the overall structure of the present invention;

FIG. 2 is a schematic view of the structure of the packaging bag of the present invention from normal atmospheric pressure to negative pressure;

FIG. 3 is a schematic cross-sectional view of the structure of the negative pressure forming mechanism of the present invention;

FIG. 4 is a partial schematic structural view of the present invention;

FIG. 5 is a schematic cross-sectional view of the structure of the negative pressure hood of the present invention;

FIG. 6 is a partial cross-sectional open schematic view of the product holder and stripper plate construction of the present invention;

FIG. 7 is a schematic expanded view, partly in section, of the structure of the present invention;

the reference numerals in the drawings denote: 1-a fixed mount; 2-a negative pressure hood; 3-a transmission rod; 4-finished product placing seat; 5-fixing the box; 6-a stripper plate; 7-driving the motor A; 101-arc type rack set; 201-a pressure bar; 301-a sheave; 701-a toggle piece; 702-a bending rod; 703-a connecting rod; 501-extruding a plate; 502-a fixation rod; 503-bellows; 401-sealing groove; 402-rotating rods; 403-a torsion spring; 404-a worm; 405-drive motor B; 406-a gear; 407-gear shaft; 601-a worm gear.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention. It is to be understood that the embodiments described are only a few embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The present invention will be further described with reference to the following examples.

Example (b): referring to fig. 1 to 7, an automatic packaging machine for four-side sealing of medical gloves includes: the device comprises a fixing frame 1 arranged on one side of the packaging machine, wherein a negative pressure forming mechanism is fixedly arranged on one end of the fixing frame 1;

the fixing frame 1 is fixedly provided with a negative pressure cover 2 through an electric push rod in a connecting mode, the fixing frame 1 is provided with a transmission rod 3 in a rotating connection mode, the outer wall of the transmission rod 3 is fixedly provided with a finished product placing seat 4 in a connecting mode, and the negative pressure forming mechanism enables the negative pressure cover 2 and the finished product placing seat 4 to be matched to form negative pressure inside.

The negative pressure forming mechanism comprises a fixing box 5, the fixing box 5 is fixedly connected with a fixing frame 1, an extrusion plate 501 is arranged in the fixing box 5 in a sliding fit mode, one end of the extrusion plate 501 is fixedly connected with a fixing rod 502, a corrugated pipe 503 is fixedly connected and arranged on the inner wall of one end of the fixing box 5 in a penetrating mode, and the lower end of the corrugated pipe 503 is communicated with the inner wall of the negative pressure cover 2. The inner parts of the input end and the output end of the fixed box 5 are respectively provided with a one-way valve, the one-way conduction effect of the fixed box 5 is realized, the corrugated pipe 503 is suitable for connection when the negative pressure cover 2 moves, the bent rod 702 can drive the connecting rod 703 to push and pull in a reciprocating manner, so that the extrusion plate 501 on the fixed rod 502 connected with the connecting rod 703 can be driven to move in the fixed box 5 in a reciprocating manner, when the extrusion plate 501 moves towards one end far away from the driving motor A7, the one-way valve connected with the inner wall of the input end of the corrugated pipe 503 is opened at the moment, the one-way valve at the output end is closed, so that the corrugated pipe 503 can suck the gas in the negative pressure cover 2 and the finished product placing seat 4 into the fixed box 5, so that negative pressure is formed in the finished product placing seat 4 and the negative pressure cover 2, then when the extrusion plate 501 moves towards one end close to the driving motor A7, the one-way valve connected with the inner wall of the input end of the corrugated pipe 503 at the moment is closed, the check valve at the output end is opened so that the gas in the tank of the fixed tank 5 can be discharged.

The top surface of the fixing frame 1, which is located on the negative pressure forming mechanism, is fixedly connected with a driving motor A7, the output end of the driving motor A7 is fixedly connected with a bending rod 702, the bending rod 702 is rotatably connected with a connecting rod 703, and the other end of the connecting rod 703 is rotatably connected with the outer end of the fixing rod 502 through a pin shaft. The bending rod 702 performs a reciprocating action of the pressing plate 501.

The outer wall of the upper end of the transmission rod 3 is fixedly connected with a grooved pulley 301, and the grooved pulley 301 is movably clamped with a toggle part 701 connected with the upper end of a bending rod 702. The grooved wheel 301 can be driven to rotate 90 degrees when the stirring part 701 rotates for a circle, so that intermittent rotation is achieved, and when the negative pressure forming mechanism performs air suction to form a negative pressure environment, the stirring part 701 cannot drive the grooved wheel 301 to rotate.

Seal groove 401 has all been seted up to the finished product about placing seat 4 up end, and the finished product is placed 4 upper end inner wall rotation connections of seat and is provided with dwang 402, and dwang 402 rotates the one end outer wall of connecting and has cup jointed torsion spring 403, and torsion spring 403 other end and finished product are placed the interior wall connection of seat 4 and are fixed, and pressure sensor is installed to the dwang 402 other end. Torsion spring 403 realizes that dwang 402 keeps the effect of the state of standing up under the condition that does not have external force, can be so that can be better at the good wrapping bag of banding the finished product place seat 4 that falls, can not receive the influence to it, can carry out certain spacing direction to the wrapping bag that falls on the contrary for the wrapping bag can fall in the finished product places seat 4, the detection of next step of being convenient for.

The finished product is placed 4 lower extreme openings of seat and is rotated to be connected and be provided with stripper 6, connects on stripper 6 and is fixed with the sealing strip, on stripper 6, the sealing strip can cooperate with the seal groove 401 of downside, 6 one ends of stripper are connected fixedly and are provided with worm wheel 601, and the finished product is placed and is rotated on the seat 4 and connect and be provided with worm 404, worm 404 and worm wheel 601 meshing transmission setting. The sealing effect between seat 4 is placed to stripper 6 and finished product is realized to the sealing strip, and worm 404 and worm wheel 601 have the auto-lock effect, can make sealing strip on stripper 6 firmly support in the seal groove 401 of downside to keep good sealed effect.

One end of the finished product placing seat 4 is fixedly connected with a driving motor B405, the output end of the driving motor B405 is fixedly connected with a gear 406, the gear 406 is in meshing transmission with a gear shaft 407 connected with the outer end of the worm 404, and the gear shaft 407 is in meshing transmission with the arc-shaped rack group 101 which is in eccentric symmetry up and down on the fixing frame 1. The arc-shaped rack group 101 achieves the effect of discharging, so that the finished product placing seat 4 filled with unqualified products can move to the other side, the gear shaft 407 is meshed with the rack on the upper side of the arc-shaped rack group 101, the gear shaft 407 drives the connected worm 404 to rotate, the worm 404 can drive the discharging plate 6 connected with the worm wheel 601 to open, and the unqualified packaging bags can fall down to achieve discharging; then when the finished product that unloads the material placed seat 4 and continue to rotate, gear shaft 407 can with the rack toothing of the downside on the arc type rack group 101, thereby make gear shaft 407 realize antiport, thereby make worm 404 can drive worm wheel 601 and rotate, make the stripper 6 of opening close, driving motor B405 continues the power supply through installing the battery on the finished product placed seat 4, driving motor B405 is a motor that does not have stopper (commonly known as outage band-type brake), can rotate when having a power failure.

The bottom surface of the negative pressure cover 2 is fixedly connected with a sealing strip, the outer wall of the lower end of the negative pressure cover 2 is movably inserted into the inner wall of a sealing groove 401 at the upper side of the finished product placing seat 4, a pressing rod 201 is fixedly connected with the inner wall of the negative pressure cover 2, and the pressing rod 201 is in sliding contact with the outer wall of the rotating rod 402. The compression bar 201 realizes the rotating action of the rotating rod 402, and the sealing groove 401 realizes the good sealing effect between the negative pressure cover 2 and the finished product placing seat 4.

After the packaging bag provided with the medical gloves is subjected to edge sealing by a packaging machine, the sealed packaging bag falls into the finished product placing seat 4, and then the driving motor A7 drives the connected stirring piece 701 to rotate, so that the stirring piece 701 can drive the grooved pulley 301 to rotate, and the finished product placing seat 4 provided with the packaging bag can move to the position below the negative pressure cover 2;

at this time, the electric push rod drives the connected negative pressure hood 2 to move downwards, so that the negative pressure hood 2 can cover the finished product placing seat 4 provided with the packaging bag, when the negative pressure hood 2 moves downwards, the pressure rod 201 in the negative pressure hood 2 can be contacted with the rotating rod 402 provided with the pressure sensor, under the action of the downward moving pressure rod 201, the rotating rod 402 can rotate, so that the pressure sensor is positioned above the packaging bag, then the lower end of the negative pressure hood 2 can be inserted into the sealing groove 401 at the upper side of the finished product placing seat 4, so that the finished product placing seat 4 keeps the negative pressure hood 2 sealed, meanwhile, the driving motor A7 continues to rotate, so that the connected bending rod 702 can be driven to rotate, so that the bending rod 702 can drive the connecting rod 703 to push and pull in a reciprocating manner, so as to drive the extrusion plate 501 on the fixing rod 502 connected with the connecting rod 703 to reciprocate in the fixing box 5, when the extrusion plate 501 moves to the end far away from the driving motor A7, at this time, the check valve connected to the inner wall of the input end of the corrugated tube 503 is opened, and the check valve at the output end is closed, so that the corrugated tube 503 can suck the gas in the negative pressure hood 2 and the finished product placing seat 4 into the fixed box 5, and negative pressure is formed in the finished product placing seat 4 and the negative pressure hood 2;

at this moment, when the packaging bag expands, the sealing edge of the packaging bag is free of a gap, the packaging bag belongs to a qualified product, so that residual gas inside the packaging bag can expand under negative pressure, the expanded packaging bag can be in contact with a pressure sensor, the pressure sensor enables a driving motor B405 to be started through an electric signal, the driving motor B405 drives a connected gear 406 to rotate, the gear 406 drives a worm 404 connected with a gear shaft 407 to rotate, the worm 404 can drive a meshed worm wheel 601 to rotate, the worm wheel 601 can drive a connected discharging plate 6 to be opened, and the qualified packaging bag falls down to realize discharging;

on the contrary, when the packaging bag under the negative pressure environment does not expand, that is, the possibility that a gap exists at the sealing edge of the packaging bag is indicated, and the packaging bag belongs to an unqualified product, at this time, the unexpanded packaging bag does not contact with the pressure sensor, at this time, the discharging plate 6 is not opened, then the electric push rod drives the connected negative pressure cover 2 to move upwards, at this time, the press rod 201 does not press the rotating rod 402, so that the rotating rod 402 can rotate and reset under the action of the torsion spring 403, the standing state is kept, then the driving motor a7 drives the driving rod 3 to rotate, the finished product placing seat 4 with the unqualified product is moved to the other side, the gear shaft 407 is meshed with the rack on the upper side of the arc-shaped rack group 101, the gear shaft 407 drives the connected worm 404 to rotate, the worm 404 can drive the discharging plate 6 connected with the worm wheel 601 to open, and the unqualified packaging bag falls down, realizing classified automatic discharging;

then when the finished product that has unloaded the material is placed seat 4 and is continued to rotate, gear shaft 407 can with the rack toothing of the downside on the arc type rack group 101 to make gear shaft 407 realize antiport, thereby make worm 404 can drive worm wheel 601 and rotate, make the stripper 6 of opening close, be convenient for carry out the detection next time.

The above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and the modifications or the substitutions do not cause the essence of the corresponding technical solutions to depart from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. Medical gloves four sides seals automatic packaging machine which characterized in that includes: the device comprises a fixing frame (1) arranged on one side of the packaging machine, wherein a negative pressure forming mechanism is fixedly arranged on one end of the fixing frame (1);

the utility model discloses a negative pressure cover, including mount (1), transmission pole (3), seat (4) are placed to the fixed finished product that is provided with of mount (1) through electric push rod connection, rotate the connection on mount (1) and be provided with transfer line (3), transfer line (3) outer wall connection is fixed to be provided with, negative pressure forming mechanism makes negative pressure cover (2) place seat (4) cooperation with the finished product when inside negative pressure that forms.

2. The automatic packaging machine for the four-edge sealing of the medical gloves according to claim 1, wherein the negative pressure forming mechanism comprises a fixed box (5), the fixed box (5) is fixedly connected with the fixed frame (1), an extrusion plate (501) is arranged inside the fixed box (5) in a sliding fit manner, one end of the extrusion plate (501) is fixedly connected with a fixed rod (502), a corrugated pipe (503) is fixedly connected with the inner wall of one end of the fixed box (5) in a penetrating manner, and the lower end of the corrugated pipe (503) is communicated with the inner wall of the negative pressure cover (2).

3. The automatic packaging machine for the four-edge sealing of the medical gloves according to claim 2, wherein the fixing frame (1) is fixedly connected with a driving motor A (7) on the top surface of the negative pressure forming mechanism, the output end of the driving motor A (7) is fixedly connected with a bending rod (702), the bending rod (702) is rotatably connected with a connecting rod (703), and the other end of the connecting rod (703) is rotatably connected with the outer end of the fixing rod (502) through a pin shaft.

4. The automatic packaging machine for the four-edge sealing of the medical gloves according to claim 3, wherein a grooved wheel (301) is fixedly connected to the outer wall of the upper end of the transmission rod (3), and the grooved wheel (301) is movably clamped with a stirring piece (701) connected to the upper end of the bending rod (702).

5. The automatic packaging machine for the four-edge sealing of the medical gloves according to claim 1, wherein the upper end face and the lower end face of the finished product placing seat (4) are both provided with a sealing groove (401), the inner wall of the upper end of the finished product placing seat (4) is rotatably connected with a rotating rod (402), the outer wall of one end of the rotating rod (402) which is rotatably connected with the rotating rod is sleeved with a torsion spring (403), the other end of the torsion spring (403) is fixedly connected with the inner wall of the finished product placing seat (4), and the other end of the rotating rod (402) is provided with a pressure sensor.

6. The automatic packaging machine for the four-edge sealing of the medical gloves according to claim 5, characterized in that a stripper plate (6) is rotatably connected and arranged at the opening at the lower end of the finished product placing seat (4), a sealing strip is fixedly connected and arranged on the stripper plate (6), a worm wheel (601) is fixedly connected and arranged at one end of the stripper plate (6), and the worm wheel (601) is meshed with a worm (404) rotatably connected and arranged on the finished product placing seat (4) in a transmission manner.

7. The automatic packaging machine for the four-edge sealing of the medical gloves according to claim 6, wherein a driving motor B (405) is fixedly connected to one end of the finished product placing seat (4), a gear (406) is fixedly connected to an output end of the driving motor B (405), the gear (406) is in meshing transmission with a gear shaft (407) connected to the outer end of the worm (404), and the gear shaft (407) is in meshing transmission with the arc-shaped rack group (101) which is eccentrically symmetrical up and down on the fixed frame (1).

8. The automatic packaging machine for the four-edge sealing of the medical gloves according to claim 5, characterized in that a sealing strip is fixedly connected to the bottom surface of the negative pressure cover (2), the outer wall of the lower end of the negative pressure cover (2) is movably inserted into the inner wall of the sealing groove (401) on the upper side of the finished product placing seat (4), a pressing rod (201) is fixedly connected to the inner wall of the negative pressure cover (2), and the pressing rod (201) is in sliding contact with the outer wall of the rotating rod (402).