Marking and assembling equipment for injection pen cap assembly

Abstract

The utility model discloses marking and assembling equipment for an injection pen cap assembly, which comprises a working platform, a marking rotary conveying line and a blanking rotary conveying line are parallelly arranged on the working platform at intervals, and a refill frame grabbing mechanism, a marking mechanism and a visual inspection mechanism I are sequentially arranged on the side direction of the marking rotary conveying line along the conveying direction; a turntable assembling mechanism is arranged on the working platform between the marking rotary conveying line and the discharging rotary conveying line, and the turntable assembling mechanism is connected with a pen cap feeding mechanism; the device further comprises a transferring and overturning mechanism. In actual use, automatic feeding, marking and detecting are carried out on the refill frame along the marking rotary conveying line, then the refill frame is overturned up and down through the transferring and overturning mechanism and transferred into the rotary disc assembling mechanism, and the refill frame and a pen cap are assembled through the rotary disc assembling mechanism to form a pen cap assembly. The production efficiency and the production effect are effectively improved through automation, full-automatic production line production of injection pens is facilitated, and the layout is compact.

Description

Technical Field

[0001] The utility model relates to the technical field of injection pen assembly equipment, in particular to a marking and assembly equipment for an injection pen cap assembly. Background Art

[0002] For reusable injection pens, the injection dose can be adjusted according to actual usage requirements. Usually, an observation window is opened on the pen core holder of the injection pen, and corresponding scale values are attached to the edge of the observation window for convenient daily reading by users.

[0003] With the popularization and use of full automation, in order to improve the assembly efficiency of injection pens and ensure their assembly stability, a full automation production line for injection pens needs to be introduced. In the prior art, the scale values on the pen core holder are produced in a semi-automatic manner. The pen core holders are manually loaded onto a marking machine for marking the scale values, and then the marking effect is inspected manually while unloading. The qualified pen core holders are placed in corresponding trays, and the pen core holders are transferred to the next process for assembly in the form of trays. In the existing production, there is a lot of manual participation, the labor intensity is high, and the production efficiency still needs to be improved. Summary of the Utility Model

[0004] To solve the above problems, the present application provides a marking and assembly equipment for an injection pen cap assembly with a reasonable structure, thereby effectively improving the production efficiency and production effect through automation and contributing to the realization of a full automation production line for injection pens.

[0005] The technical solution adopted by the utility model is as follows:

[0006] A marking and assembly equipment for an injection pen cap assembly includes a working platform. On the working platform, a marking rotary conveyor line and a blanking rotary conveyor line are arranged in parallel at intervals. Along the conveying direction on the side of the marking rotary conveyor line, a pen core holder grasping mechanism, a marking mechanism, and a visual inspection mechanism I are arranged in sequence. On the working platform between the marking rotary conveyor line and the blanking rotary conveyor line, a turntable assembly mechanism is arranged, and the turntable assembly mechanism is connected with a pen cap feeding mechanism. A transfer and flipping mechanism is also included.

[0007] As a further improvement of the above technical solution:

[0008] On the marking rotary conveyor line, a marking rotary trolley is rotated and conveyed. A plurality of accommodating positions for accommodating pen core holders are opened on the marking rotary trolley. At the marking rotary conveyor line where the marking mechanism is located, a lateral clamping mechanism and a pressing mechanism are installed. The lateral clamping mechanism includes a plurality of lateral clamping claws, and the pen core holder on the marking rotary trolley is clamped and fixed by the lateral clamping claws. The lower pressing plate in the pressing mechanism descends and limits at the top of the corresponding pen core holder.

[0009] The pressing mechanism includes a pressing frame mounted above the marking rotary conveyor line, a pressing plate is mounted on the side of the pressing frame for vertical movement, an ion blower is also mounted on the side of the pressing frame, and the ion blower is arranged toward the marking rotary trolley.

[0010] The transfer and flipping mechanism includes a linear moving module, on which two sets of lifting and transferring mechanisms are installed; a flipping assembly is installed on a working platform located below the linear moving module, one set of lifting and transferring mechanisms transfers the refill rack on the marking rotary conveyor line to the flipping table of the flipping assembly, and the other set of lifting and transferring mechanisms transfers and assembles the flipped refill rack on the flipping assembly to the turntable assembly mechanism.

[0011] One end of the unloading rotary conveyor line is connected and matched with the turntable assembly mechanism, and the other end of the unloading rotary conveyor line is connected and arranged with the unloading conveyor line. A component transfer mechanism is installed at the connection of the turntable assembly mechanism and the unloading rotary conveyor line, and a unloading loading mechanism is arranged at the connection of the unloading conveyor line and the unloading rotary conveyor line; the component transfer mechanism and the unloading loading mechanism grab and transfer multiple groups of pen cap components at a time, and a rotary seat is provided on the unloading rotary conveyor line for rotary conveying, and a single rotary seat is used to support a single group of pen cap components.

[0012] The turntable assembly mechanism includes a turntable, and four groups of turntable fixtures are arranged at intervals along the edge of the turntable to form a four-station turntable structure. The four stations along the rotation direction of the turntable are respectively opposite to the pen cap feeding mechanism, the transfer and flipping mechanism, the second visual inspection mechanism, and the component transfer mechanism.

[0013] The component transfer mechanism and the material unloading and loading mechanism both include a lifting seat, and a variable pitch component is arranged on the side of the lifting seat along the conveying direction of the unloading rotary conveyor line, and a plurality of clamping claw mechanisms are installed in an orderly manner below the variable pitch component.

[0014] The structure of the variable pitch assembly is as follows: it includes multiple groups of clamping assemblies installed in parallel and downward on the side of the lifting seat, one group of clamping assemblies at the end is installed on the lifting seat via a fixed seat, and the remaining clamping assemblies are slidably mounted on the transverse track on the side of the lifting seat via corresponding movable seats, and a connecting section is installed between adjacent fixed seats and movable seats; one end of the connecting section is fixedly installed, and the other end is movably installed via a slide groove and a pin shaft, and a push-pull plate that passes backward through a long groove on the lifting seat is installed on the movable seat away from the fixed seat, and the push-pull plate is installed on the output end of the cylinder.

[0015] The unloading conveyor line is arranged vertically at the end of the unloading rotary conveyor line, and the unloading conveyor line supports and conveys the material tray. A lifting and stacking mechanism for stacking empty trays is arranged on the unloading conveyor line located on one side of the unloading tray loading mechanism, and a lifting and stacking mechanism for stacking full trays is arranged on the unloading conveyor line located on the other side of the unloading tray loading mechanism.

[0016] The blanking rotary conveyor line includes two sets of conveyor lines arranged in parallel. On both sides of the end of the blanking rotary conveyor line, a limiting component and a pushing component are respectively arranged. A stopping component is also arranged behind the pushing component; the stopping component stops a preset number of rotary seats on one set of conveyor lines, and the pushing component pushes the stopped preset number of rotary seats onto the other set of conveyor lines.

[0017] Compared with the prior art, the utility model has the following beneficial effects:

[0018] In actual use of the utility model, along the marking rotary conveyor line, the pen core holders are automatically loaded, marked, and inspected. Then, the pen core holders are turned over up and down and transferred to the turntable assembly mechanism by the transfer and flipping mechanism. The turntable assembly mechanism assembles the pen core holders and pen caps to form pen cap assemblies, effectively improving production efficiency and production effect through automation, and facilitating the realization of fully automated production line production of injection pens. The layout is compact and the floor area is small.

[0019] The utility model also has the following advantages:

[0020] By installing an ion blower on the pressing mechanism at the marking position, the static electricity adsorbed on the pen core holders can be effectively removed, achieving the purpose of static electricity neutralization and dust prevention, and facilitating the subsequent reliable and smooth assembly of the pen core holders.

[0021] By setting the blanking rotary conveyor line, the rotary seats on the blanking rotary conveyor line that support a single group of pen cap assemblies in a rotary manner, combined with the setting of the component transfer mechanism and the variable pitch component in the blanking and loading mechanism, effectively realize the rapid adjustment of the distance between adjacent pen cap assemblies during the transfer process, especially suitable for the situation where the number of assemblies per time in the turntable assembly mechanism is inconsistent with the number of loading per time in the blanking and loading mechanism, effectively improving the actual use flexibility and being applicable to the use of different models of products. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 is a schematic structural diagram of the utility model.

[0023] Figure 2 is a schematic layout diagram of the marking rotary conveyor line and the side mechanism of the utility model.

[0024] Figure 3 is a schematic structural diagram of the transfer and flipping mechanism of the utility model.

[0025] Figure 4 is a schematic structural diagram of the turntable assembly mechanism of the utility model.

[0026] Figure 5 is a schematic structural diagram of the variable pitch component in the component transfer mechanism of the utility model.

[0027] Figure 6This is a schematic structural diagram of another perspective of the variable pitch component in the component transfer mechanism of the present utility model.

[0028] Figure 7 This is a schematic structural diagram of the blanking rotary conveying line of the present utility model.

[0029] Figure 8 This is a schematic structural diagram of the blanking and tray loading mechanism of the present utility model.

[0030] Wherein: 1. Working platform; 2. Pen core holder grabbing mechanism; 3. Marking mechanism; 4. Visual inspection mechanism I; 5. Transfer and flipping mechanism; 6. Turntable assembly mechanism; 7. Component transfer mechanism; 8. Blanking and tray loading mechanism; 9. Blanking conveying line; 10. Pen core holder feeding mechanism; 11. Marking rotary conveying line; 12. Blanking rotary conveying line; 20. Pen cap feeding mechanism; 30. Lateral clamping mechanism; 31. Pressing mechanism; 100. Tray; 110. Marking rotary trolley; 111. Straight section; 112. Transfer section; 121. Limit component; 122. Pushing component; 123. Stopping component;

[0031] 51. Linear movement module; 52. Lifting and transfer mechanism; 53. Flipping component; 54. Scrap box;

[0032] 60. Turntable fixture; 61. Pen cap grabbing mechanism; 62. Visual inspection mechanism II; 63. Light source;

[0033] 71. Lifting seat; 72. Horizontal track; 73. Fixed seat; 74. Moving seat; 75. Connecting section; 76. Pin shaft; 77. Push - pull plate; 78. Cylinder; 711. Long slot; 751. Slide slot;

[0034] 81. Bracket; 82. Grabbing and transfer mechanism; 83. Lateral supporting mechanism; 84. Jacking mechanism; 85. Top plate loading mechanism. Specific embodiments

[0035] The following will describe the specific embodiments of the present utility model with reference to the accompanying drawings.

[0036] As Figure 1 and Figure 2 shown, the marking and assembly equipment for the pen cap assembly of the injection pen in this embodiment includes a working platform 1. On the working platform 1, a marking rotary conveying line 11 and a blanking rotary conveying line 12 are arranged in parallel at intervals. Along the conveying direction on the side of the marking rotary conveying line 11, a pen core holder grabbing mechanism 2, a marking mechanism 3, and a visual inspection mechanism I 4 are arranged in sequence; on the working platform 1 between the marking rotary conveying line 11 and the blanking rotary conveying line 12, a turntable assembly mechanism 6 is arranged, and a pen cap feeding mechanism 20 is connected to the turntable assembly mechanism 6; a transfer and flipping mechanism 5 is also included.

[0037] In actual use, along the marking rotary conveyor line 11, the pen core holders are automatically loaded, marked, and inspected. Then, the transfer and flipping mechanism 5 flips the pen core holders up and down and transfers them to the turntable assembly mechanism 6. The turntable assembly mechanism 6 assembles the pen core holders and pen caps to form pen cap assemblies, thereby effectively improving production efficiency and production effects through automation.

[0038] There is a marking rotary trolley 110 rotating and conveying on the marking rotary conveyor line 11. A plurality of accommodating positions for accommodating pen core holders are provided on the marking rotary trolley 110. At the marking rotary conveyor line 11 located at the marking mechanism 3, a lateral clamping mechanism 30 and a downward pressing mechanism 31 are installed. The lateral clamping mechanism 30 includes a plurality of lateral clamping jaws, and the pen core holders on the marking rotary trolley 110 are clamped and fixed by the lateral clamping jaws. The lower pressing plate in the downward pressing mechanism 31 descends and limits at the top of the corresponding pen core holder.

[0039] In this embodiment, when the pen core holder is conveyed by the marking rotary trolley 110 to the marking position aligned with the marking mechanism 3, the pen core holder is position-limited and fixed by the combination of the downward pressing mechanism 31 and the lateral clamping mechanism 30 to ensure the accuracy of the marking of the pen core holder by the marking mechanism 3.

[0040] The marking rotary conveyor line 11 includes parallel straight sections 111. The two ends of the two straight sections 111 are respectively matched with transfer sections 112. The transfer sections 112 are rotated and aligned with one end of one of the straight sections 111 under the drive of the power mechanism to realize the rotary conveying of the marking rotary trolley 110.

[0041] The downward pressing mechanism 31 includes a downward pressing frame erected above the marking rotary conveyor line 11. A lower pressing plate is installed on the side of the downward pressing frame to move up and down. An ion blower is also installed on the side of the downward pressing frame, and the ion blower is arranged towards the marking rotary trolley 110.

[0042] In this embodiment, by installing an ion blower on the downward pressing mechanism 31 at the marking position, the static electricity adsorbed on the pen core holder can be effectively removed, achieving the purpose of static electricity neutralization and dust prevention, and helping to ensure the reliable and smooth subsequent assembly of the pen core holder.

[0043] As Figure 3 shown, the transfer and flipping mechanism 5 includes a linear movement module 51, and two sets of lifting and transfer mechanisms 52 are installed on the linear movement module 51. A flipping assembly 53 is installed on the working platform 1 below the linear movement module 51. One set of lifting and transfer mechanisms 52 transfers the pen core holders on the marking rotary conveyor line 11 to the flipping table of the flipping assembly 53. After the flipping table clamps the pen core holders, they are driven by the motor to flip up and down together. The other set of lifting and transfer mechanisms 52 transfers the flipped pen core holders on the flipping assembly 53 to the turntable assembly mechanism 6 for assembly.

[0044] In this embodiment, a waste box 54 can also be provided to remove unqualified products via the waste box 54.

[0045] One end of the blanking rotary conveyor line 12 is connected and matched with the turntable assembly mechanism 6. The other end of the blanking rotary conveyor line 12 is connected and provided with a blanking conveyor line 9. A component transfer mechanism 7 is installed at the connection between the turntable assembly mechanism 6 and the blanking rotary conveyor line 12. The component transfer mechanism 7 transfers the pen cap components on the turntable assembly mechanism 6 to the blanking rotary conveyor line 12; a blanking loading mechanism 8 is arranged at the connection between the blanking conveyor line 9 and the blanking rotary conveyor line 12. The blanking loading mechanism 8 transfers the pen cap components on the blanking rotary conveyor line 12 to the blanking conveyor line 9; the component transfer mechanism 7 and the blanking loading mechanism 8 simultaneously grab and transfer multiple groups of pen cap components at a time. There is a rotary seat on the blanking rotary conveyor line 12 for rotating and conveying, and a single rotary seat is used to support a single group of pen cap components.

[0046] As Figure 4 shown, the turntable assembly mechanism 6 includes a turntable. Four groups of turntable jigs 60 are arranged at intervals along the edge of the turntable to form a four-station turntable structure. The four stations along the rotation direction of the turntable are respectively facing the pen cap feeding mechanism 20, the transfer and flipping mechanism 5, the vision inspection mechanism II 62, and the component transfer mechanism 7.

[0047] In this embodiment, the pen cap can be grabbed from the pen cap feeding mechanism 20 by the pen cap grabbing mechanism 61 and placed into the turntable jig 60 of the turntable. Then, the pen core holder is transferred and assembled into the pen cap in the turntable jig 60 by the transfer and flipping mechanism 5. Then, the assembly is inspected by the vision inspection mechanism II 62. Finally, the assembled pen cap components in the turntable jig 60 are removed by the component transfer mechanism 7.

[0048] In this embodiment, in order to ensure the imaging reliability of the vision inspection mechanism II 62, a light source 63 can also be arranged opposite to the vision inspection mechanism II 62 according to actual use requirements.

[0049] Both the component transfer mechanism 7 and the blanking loading mechanism 8 include a lifting seat 71. A variable pitch component is arranged along the conveying direction of the blanking rotary conveyor line 12 on the side of the lifting seat 71, and a plurality of jaw mechanisms are orderly installed below the variable pitch component.

[0050] In this embodiment, by setting the blanking rotary conveyor line 12, and the rotary seat for rotating and conveying and supporting a single group of pen cap components on the blanking rotary conveyor line 12, combined with the setting of the variable pitch components in the component transfer mechanism 7 and the blanking loading mechanism 8, the distance between adjacent pen cap components can be effectively and quickly adjusted during the transfer process, especially applicable to the situation where the number of single-time assemblies in the turntable assembly mechanism 6 is inconsistent with the number of single-time loading in the blanking loading mechanism 8, effectively improving the actual use flexibility and being applicable to the use of different models of products.

[0051] AsFigure 5 and Figure 6 As shown, the structure of the variable pitch assembly is as follows: it includes a plurality of clamping assemblies installed in parallel and downward on the side of the lifting seat 71, one group of clamping assemblies at the end is installed on the lifting seat 71 via a fixed seat 73, and the remaining clamping assemblies are slidably mounted on the transverse track 72 on the side of the lifting seat 71 via corresponding movable seats 74, and a connecting section 75 is installed between adjacent fixed seats 73 and movable seats 74; one end of the connecting section 75 is fixedly installed, and the other end is movably installed via a slide groove 751 and a pin shaft 76, and a push-pull plate 77 that passes backward through the long groove 711 on the lifting seat 71 is installed on the movable seat 74 away from the fixed seat 73, and the push-pull plate 77 is installed on the output end of the cylinder 78.

[0052] In actual use, as the cylinder 78 works, the movable seat 74 is pulled toward or away from the fixed seat 73 via the push-pull plate 77, thereby adjusting the spacing, so that the pen cap assemblies with smaller spacing on the turntable assembly mechanism 6 can be smoothly transferred to the various rotating seats with larger spacing on the unloading rotary conveyor line 12, or multiple groups of pen cap assemblies can be smoothly transferred from the rotating seats with larger spacing to the material tray 100 with smaller spacing.

[0053] like Figure 7 As shown, the unloading rotary conveyor line 12 includes two groups of conveyor lines arranged in parallel, and a limit component 121 and a pushing component 122 are respectively arranged on both sides of the end of the unloading rotary conveyor line 12, and a stop component 123 is also arranged behind the pushing component 122; the stop component 123 stops a preset number of rotary seats on one group of conveyor lines, and the pushing component 122 pushes the stopped preset number of rotary seats to another group of conveyor lines, thereby realizing the rotation of the rotary seats on the unloading rotary conveyor line 12.

[0054] like Figure 8 As shown, the unloading conveyor line 9 is vertically arranged at the end of the unloading rotary conveyor line 12, and the unloading conveyor line 9 supports and conveys the material tray 100. The unloading conveyor line 9 located on one side of the unloading and loading mechanism 8 is provided with a lifting and stacking mechanism for stacking empty material trays 100, and the unloading conveyor line 9 located on the other side of the unloading and loading mechanism 8 is provided with a lifting and stacking mechanism for stacking full material trays 100.

[0055] A top tray loading mechanism 85 is installed on the unloading conveyor line 9 located at the unloading loading mechanism 8. The unloading loading mechanism 8 includes a bracket 81 horizontally mounted on the unloading conveyor line 9, and a grabbing and transferring mechanism 82 that can be raised and lowered is movably installed on the bracket 81; the top tray loading mechanism 85 lifts up a single material tray 100 on the unloading conveyor line 9, and then the grabbing and transferring mechanism 82 places the assembled pen cap assemblies in batches in the material tray 100.

[0056] The lifting and stacking mechanism includes a lifting mechanism 84 and lateral supporting mechanisms 83 located on the upper parts on both sides of the blanking conveyor line 9. The lifting mechanism 84 and the lateral supporting mechanisms 83 are used in cooperation to realize the up-and-down stacking operation or the unfolding operation of multiple trays 100.

[0057] In actual use, the pen holder feeding mechanism 10 connected to an external vibrating bowl can cooperate with the pen holder grasping mechanism 2 to perform the orderly feeding of the pen holder, and the pen cap feeding mechanism 20 connected to an external vibrating bowl can cooperate with the pen cap grasping mechanism 61 to perform the orderly feeding of the pen cap.

[0058] In this embodiment, the marking mechanism 3 can adopt a commercially available laser marking machine, and the first vision inspection mechanism 4 and the second vision inspection mechanism 62 can adopt a commercially available vision system, which can realize the inspection through image acquisition and image comparison and analysis.

[0059] The utility model realizes the scale marking on the pen holder and the assembly of the pen holder and the pen cap. The overall layout is compact, and the production efficiency and production effect are effectively improved through automation, which helps to realize the fully automated production line of the injection pen.

[0060] In this specification, each embodiment is described in a progressive manner. The key point of each embodiment is to illustrate the differences from other embodiments. The same or similar parts among the embodiments can be referred to each other.

[0061] The above description is an interpretation of the utility model, not a limitation thereof. The scope defined by the utility model can be seen in the claims. Any form of modification can be made within the protection scope of the utility model.

Claims

1. A marking and assembling device for an injection pen cap assembly, comprising a working platform (1), characterized in that: On the working platform (1), a marking rotary conveyor line (11) and a blanking rotary conveyor line (12) are arranged in parallel at intervals. Along the conveying direction laterally on the marking rotary conveyor line (11), a pen core holder grasping mechanism (2), a marking mechanism (3), and a first vision inspection mechanism (4) are arranged in sequence; on the working platform (1) between the marking rotary conveyor line (11) and the blanking rotary conveyor line (12), a turntable assembly mechanism (6) is arranged, and a pen cap feeding mechanism (20) is connected to the turntable assembly mechanism (6); a transfer and flipping mechanism (5) is also included.

2. The marking and assembling device for the pen cap assembly of an injection pen according to claim 1, wherein: On the marking rotary conveyor line (11), a marking rotary trolley (110) is rotated and conveyed. A plurality of accommodating positions for accommodating pen core holders are provided on the marking rotary trolley (110); at the marking rotary conveyor line (11) where the marking mechanism (3) is located, a lateral clamping mechanism (30) and a pressing mechanism (31) are installed. The lateral clamping mechanism (30) includes a plurality of lateral clamping jaws, and the pen core holder on the marking rotary trolley (110) is clamped and fixed by the lateral clamping jaws. The lower pressing plate in the pressing mechanism (31) descends and limits at the top of the corresponding pen core holder.

3. The marking and assembling device for the pen cap assembly of an injection pen according to claim 2, wherein: The pressing mechanism (31) includes a pressing frame arranged above the marking rotary conveyor line (11). A lower pressing plate is installed on the side of the pressing frame to move up and down. An ion blower is also installed on the side of the pressing frame, and the ion blower is arranged towards the marking rotary trolley (110).

4. The marking and assembling device for the pen cap assembly of an injection pen according to claim 1, wherein: The transfer and flipping mechanism (5) includes a linear movement module (51), and two sets of lifting and transfer mechanisms (52) are installed on the linear movement module (51); a flipping component (53) is installed on the working platform (1) below the linear movement module (51). One set of lifting and transfer mechanisms (52) transfers the pen core holder on the marking rotary conveyor line (11) to the flipping table of the flipping component (53), and the other set of lifting and transfer mechanisms (52) transfers the flipped pen core holder on the flipping component (53) for assembly to the turntable assembly mechanism (6).

5. The marking and assembling device for the pen cap assembly of an injection pen according to claim 1, characterized in that: One end of the blanking rotary conveyor line (12) is connected and matched with the turntable assembly mechanism (6). The other end of the blanking rotary conveyor line (12) is connected and provided with a blanking conveyor line (9). A component transfer mechanism (7) is installed at the connection between the turntable assembly mechanism (6) and the blanking rotary conveyor line (12). A blanking and loading mechanism (8) is arranged at the connection between the blanking conveyor line (9) and the blanking rotary conveyor line (12); the component transfer mechanism (7) and the blanking and loading mechanism (8) simultaneously grasp and transfer multiple groups of pen cap components at a time. A rotary seat is rotated and conveyed on the blanking rotary conveyor line (12), and a single rotary seat is used to support a single group of pen cap components.

6. The marking and assembling device for the injection pen cap assembly according to claim 5, characterized in that: The turntable assembly mechanism (6) includes a turntable. Four sets of turntable fixtures (60) are arranged at intervals along the edge of the turntable to form a four-station turntable structure. The four stations along the rotation direction of the turntable are respectively facing the pen cap feeding mechanism (20), the transfer and flipping mechanism (5), the second vision inspection mechanism (62), and the component transfer mechanism (7).

7. The marking and assembling device for the pen cap assembly of an injection pen according to claim 5, characterized in that: The component transfer mechanism (7) and the material unloading and loading mechanism (8) both include a lifting seat (71), and a variable pitch component is arranged on the side of the lifting seat (71) along the conveying direction of the unloading rotary conveyor line (12), and a plurality of clamping claw mechanisms are installed in an orderly manner below the variable pitch component.

8. The marking and assembling device for the pen cap assembly of an injection pen according to claim 7, characterized in that: The structure of the pitch-changing assembly is as follows: it comprises a plurality of groups of clamping assemblies which are installed downwardly in parallel on the side of the lifting seat (71); a group of clamping assemblies at the end is installed on the lifting seat (71) via a fixed seat (73); the remaining clamping assemblies are slidably mounted on a transverse track (72) on the side of the lifting seat (71) via a corresponding movable seat (74); a connecting section (75) is installed between adjacent fixed seats (73) and movable seats (74); one end of the connecting section (75) is fixedly installed, and the other end is movably installed via a slide groove (751) and a pin shaft (76); a push-pull plate (77) which passes backward through a long groove (711) on the lifting seat (71) is installed on the movable seat (74) away from the fixed seat (73); and the push-pull plate (77) is installed on the output end of the cylinder (78).

9. The marking and assembling device for the pen cap assembly of an injection pen according to claim 5, characterized in that: The unloading conveyor line (9) is arranged vertically at the end of the unloading rotary conveyor line (12); the unloading conveyor line (9) supports the conveying tray (100); a lifting and stacking mechanism for stacking empty trays (100) is arranged on the unloading conveyor line (9) located on one side of the unloading tray loading mechanism (8); and a lifting and stacking mechanism for stacking full trays (100) is arranged on the unloading conveyor line (9) located on the other side of the unloading tray loading mechanism (8).

10. The marking and assembling device for the pen cap assembly of an injection pen according to claim 5, wherein: The unloading rotary conveyor line (12) comprises two groups of conveyor lines arranged in parallel, and a limit assembly (121) and a push assembly (122) are respectively arranged on both sides of the end of the unloading rotary conveyor line (12), and a stop assembly (123) is also arranged behind the push assembly (122); the stop assembly (123) stops a preset number of rotary seats on one group of conveyor lines, and the push assembly (122) pushes the stopped preset number of rotary seats to the other group of conveyor lines.

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