A positioning mechanism for a stationery printer

Abstract

This utility model relates to the field of positioning mechanisms, specifically to a positioning mechanism for a stationery printing machine, comprising: a fixed platform with symmetrically arranged sliding clamping mechanisms on both sides of its top, and a movable cleaning component on the top of the fixed platform; the clamping mechanism includes symmetrically arranged pressure plate assemblies and elastic clamping assemblies, the pressure plate assemblies forming a vertical sliding fit with the fixed platform, and adaptive elastic clamping using an arc-shaped plate structure with alternating upper and lower pressure plates, the top pressure plate can slide along the positioning axis and the clamping force can be adjusted by a nut, combined with the elastic buffering effect of the return spring on the inner side of the arc-shaped plate, the clamping pressure can be adaptively adjusted according to the thickness of the PVC board, acrylic board, etc., ensuring clamping stability while avoiding the indentation and deformation problems caused by traditional rigid clamping.

Description

Technical Field

[0001] This utility model belongs to the field of positioning mechanisms, and specifically relates to a positioning mechanism for a stationery printing machine. Background Technology

[0002] In the printing and processing of sheet-based stationery products such as PVC business card holders, acrylic signs, and plastic folders, the performance of the printing positioning mechanism directly affects the finished product qualification rate and production efficiency. With the rapid development of the personalized stationery market, users have placed higher demands on the printing precision, surface quality, and delivery cycle of sheet-based stationery.

[0003] Existing positioning mechanisms are mostly designed for flexible materials such as paper, and have poor adaptability to rigid materials such as PVC boards and acrylic boards. Single-layer pressure plate structures are prone to insufficient clamping force due to board thickness tolerances, while multi-layer manual adjustment mechanisms are complicated to operate and cannot achieve automatic compensation of clamping force, and the board is prone to micro-displacement during the printing process.

[0004] After stamping and cutting, board-type stationery is prone to having burrs, oil stains, and plastic powder particles remaining on its surface. Failure to remove surface dust and impurities during the printing process affects print quality. Utility Model Content

[0005] The purpose of this invention is to overcome the shortcomings of existing positioning mechanisms in the background art, which are designed for flexible paper and are difficult to adapt to rigid boards. These mechanisms suffer from insufficient clamping force, complex adjustment, and inability to automatically compensate for board displacement. They also lack synchronous surface cleaning function during printing. Therefore, this invention provides a positioning mechanism for stationery printing machines.

[0006] To achieve the above-mentioned objectives, the technical solution of this utility model is: a positioning mechanism for a stationery printing machine, including a fixed platform, on both sides of its top of which are symmetrically provided sliding clamping mechanisms, and the top of the fixed platform is also provided with a movable cleaning component;

[0007] The clamping mechanism includes symmetrically arranged pressure plate assemblies and elastic clamping assemblies, and the pressure plate assemblies are in a vertical sliding fit with the fixed platform.

[0008] In the above-mentioned positioning mechanism for stationery printing machine, the two sets of pressure plate assemblies each include two pressure plates stacked on top of each other. The bottom pressure plate has a positioning shaft fixed at both ends of its top. The top pressure plate has a corresponding guide through hole that slides along the positioning shaft. The upper end of the positioning shaft has an internal thread section and is fitted with a clamping nut.

[0009] In the positioning mechanism for the stationery printing machine described above, the top pressure plate and the bottom pressure plate are respectively provided with staggered arc-shaped pressing plates on their opposite side walls. The arc-shaped pressing plates form an elastic pressing structure with the corresponding pressure plates through an elastic reset component.

[0010] In the aforementioned positioning mechanism for a stationery printing machine, the elastic clamping assembly includes:

[0011] Evenly distributed protrusions on the sidewalls of each pressure plate, with clearance gaps formed between adjacent protrusions;

[0012] Multiple horizontal sliding holes are formed on the side wall of the pressure plate, and the arc-shaped pressure plate forms a sliding fit with the sliding holes through the anti-deviation shaft;

[0013] The end of the anti-deviation shaft is provided with an annular limiting step, and the shaft section of the anti-deviation shaft located in the sliding hole is fitted with a return spring. The two ends of the return spring abut against the inner wall of the arc-shaped pressing plate and the bottom surface of the sliding hole, respectively.

[0014] The bottom pressure plate has sliding sleeves fixed at both ends. The sliding sleeves are slidably connected to sliding shafts. Each pair of sliding shafts is slidably connected to both sides of the fixed platform. The sidewalls of the sliding shafts are fixed with sliders for sliding on the fixed platform.

[0015] In the aforementioned positioning mechanism for a stationery printing machine, the cleaning component includes a movable support assembly, a drive transmission assembly, and a double-acting cleaning assembly. The movable support assembly forms a horizontal moving pair with the fixed table through a toothed meshing structure.

[0016] The movable support assembly includes a support frame, the bottom crossbeam of which is fixed with a scraper by bolts;

[0017] The support frame has a transmission shaft rotatably supported on the inner side of the vertical beams at both ends, and transmission wheels are fixedly connected to both ends of the transmission shaft;

[0018] The fixed platform has toothed strips fixed to its two sides along its length, and the outer edge teeth of the transmission wheel and the toothed strips form a meshing transmission pair.

[0019] In the aforementioned positioning mechanism for a stationery printing machine, the drive transmission assembly includes a first drive motor fixed to the end of the support frame, and its output shaft is coaxially connected to the end of the transmission shaft via a coupling.

[0020] In the aforementioned positioning mechanism for a stationery printing machine, the dual-action cleaning assembly includes a plurality of second drive motors spaced apart along the length of the support frame beam, with the output shaft of each second drive motor set vertically downward.

[0021] Each of the second drive motor output shafts has a cleaning blade fixed to its end.

[0022] Compared with the prior art, the positioning mechanism for stationery printing machines of this utility model has at least the following beneficial effects:

[0023] 1. This utility model discloses a positioning mechanism for a stationery printing machine. Through adaptive elastic clamping, it employs an alternating upper and lower pressure plates with an arc-shaped plate structure. The top pressure plate can slide along the positioning axis, and the clamping force can be adjusted via a nut. Combined with the elastic buffering effect of the return spring on the inner side of the arc-shaped plate, the clamping pressure can be adaptively adjusted according to the thickness of materials such as PVC and acrylic sheets, ensuring clamping stability while avoiding the indentation and deformation problems caused by traditional rigid clamping. The arc-shaped contact design between the arc-shaped plate and the surface of the material increases the contact area and disperses pressure, further improving clamping reliability and making it suitable for high-precision printing requirements.

[0024] 2. The cleaning component is driven by a first drive motor to move the transmission wheel on the toothed rack, causing the scraper and cleaning blades to reciprocate synchronously along the surface of the fixed table. The rotation of the cleaning blades, combined with the rigid contact of the scraper, can effectively remove dust, fibers, debris and other impurities from the surface of the board. It has a particularly good cleaning effect on residual impurities near the edges of the board and the clamping area, avoiding defects such as dot clogging and uneven ink layer caused by impurities during printing, thus improving the pass rate of printed products. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the first overall structure of this utility model;

[0026] Figure 2 This is a schematic diagram of the second overall structure of this utility model;

[0027] Figure 3 This is a front view schematic diagram of the clamping mechanism of this utility model;

[0028] Figure 4 This is a cross-sectional schematic diagram of the clamping mechanism of this utility model.

[0029] In the diagram: 1. Fixed platform; 2. Supporting leg;

[0030] 3. Clamping mechanism; 301. Pressure plate; 302. Protrusion; 303. Arc plate; 304. Return spring; 305. Anti-deviation shaft; 306. Positioning shaft;

[0031] 4. Cleaning components; 401. Support frame; 402. First drive motor; 403. Transmission wheel; 404. Transmission shaft; 405. Toothed rack; 406. Scraper; 407. Second drive motor; 408. Cleaning blade;

[0032] 5. Sliding shaft; 6. Sliding sleeve. Detailed Implementation

[0033] The positioning mechanism for a stationery printing machine of this utility model will be described in more detail below with reference to the accompanying drawings and specific embodiments.

[0034] In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0035] This embodiment discloses a positioning mechanism for a stationery printing machine. Existing positioning mechanisms are designed specifically for flexible paper and are difficult to adapt to rigid paper. They suffer from insufficient clamping force, complex adjustment, and inability to automatically compensate for easy displacement of the paper. Furthermore, they lack a synchronous surface cleaning function during printing. Referring to… Figures 1-4 It mainly includes a fixed platform 1, with symmetrically arranged sliding clamping mechanisms 3 on both sides of its top. The fixed platform 1 is also equipped with a movable cleaning component 4. The clamping mechanism 3 includes symmetrically arranged pressure plate components and elastic clamping components. The pressure plate components and the fixed platform 1 form a vertical sliding fit.

[0036] The fixed table 1 has symmetrically arranged sliding clamping mechanisms 3 on both sides of its top. This symmetrical layout ensures that the clamping force is evenly distributed on both sides of the workpiece, avoiding positioning deviation caused by uneven loading. The clamping mechanism 3 and the fixed table 1 form a vertical sliding fit through a guide structure, allowing the clamping mechanism 3 to move up and down along the vertical guide path on the top of the fixed table 1 to meet the positioning requirements of workpieces of different heights.

[0037] The top of the fixed platform 1 is also provided with a movable cleaning component 4. The cleaning component 4 is connected to the fixed platform 1 through a transmission mechanism and can reciprocate along a preset trajectory on the surface of the fixed platform 1 to achieve full-area cleaning coverage of the workpiece surface.

[0038] Reference Figures 1-4The two pressure plate assemblies each include two pressure plates 301 stacked vertically. Positioning shafts 306 are fixed to both ends of the top of the bottom pressure plate 301. The top pressure plate 301 has corresponding guide holes that slide along the positioning shafts 306. The upper end of the positioning shafts 306 has an internal thread section and is fitted with a clamping nut. The opposite sidewalls of the top and bottom pressure plates 301 are respectively provided with staggered arc-shaped clamping plates 303. The arc-shaped clamping plates 303 form an elastic pressing structure with the corresponding pressure plates 301 through an elastic reset assembly. The elastic clamping assembly includes: protrusions 302 evenly distributed on the sidewalls of each pressure plate 301, with clearance gaps between adjacent protrusions 302; multiple horizontal sliding holes opened on the sidewalls of the pressure plate 301, with the arc-shaped clamping plate 303 slidingly engaged with the sliding holes via an anti-deviation shaft 305; the end of the anti-deviation shaft 305 is provided with an annular limiting step, and the shaft section of the anti-deviation shaft 305 located in the sliding hole is fitted with a return spring 304, with the two ends of the return spring 304 respectively abutting against the inner wall of the arc-shaped clamping plate 303 and the bottom surface of the sliding hole; the two ends of the bottom pressure plate 301 are fixed with sliding sleeves 6, and the sliding sleeves 6 are slidably connected with sliding shafts 5 inside, with each pair of sliding shafts 5 slidably connected to both sides of the fixed platform 1, and the sidewalls of the sliding shafts 5 are fixed with sliders for sliding on the fixed platform 1.

[0039] The pressure plate assembly adopts a multi-stage linkage adjustment mechanism. The top pressure plate 301 and the bottom pressure plate 301 form a vertically coordinated motion system through the positioning shaft 306. When the top pressure plate is operated, its sliding along the guide hole can synchronously drive the displacement of the bottom pressure plate 301 on the sliding shaft 5, forming an adaptive compensation of the clamping thickness by the upper and lower pressure plates. The elastic reset component of the arc-shaped clamping plate 303 forms a three-dimensional dynamic limiting structure through the cooperation of the anti-deviation shaft 305 and the sliding hole. During the clamping process, the curved contact surface of the arc-shaped clamping plate can deflect in multiple directions according to the shape of the workpiece, while the elastic deformation of the reset spring 304 provides continuous clamping force, ensuring that the clamping contact surface always maintains uniform contact with the workpiece surface.

[0040] The sliding sleeve 6 and the sliding shaft 5 work together to adjust the vertical height by moving the sliding sleeve 6 on the sliding shaft 5, and to adjust the horizontal spacing by moving the sliding shaft 5 along the side of the fixed platform 1. During adjustment, the bolt locking mechanism of the sliding sleeve 6 can independently fix the working height of each pressure plate 301, while the slider system of the sliding shaft 5 achieves precise matching of the spacing between the two sets of pressure plate assemblies through step-by-step positioning.

[0041] The axial sliding of the anti-deviation shaft 305 within the sliding hole provides longitudinal displacement freedom, while the slight angular deflection of the arc-shaped clamping plate around the anti-deviation shaft 305 creates lateral self-correction capability. The torque generated by the return spring 304 during compression causes the arc-shaped clamping plate 303 to produce an inward convergent movement, effectively eliminating clamping gaps caused by workpiece thickness deviations. Simultaneously, the annular limiting step constrains the stroke of the anti-deviation shaft 305, preventing structural deformation caused by excessive pressure.

[0042] Reference Figure 1 and Figure 2 The cleaning component 4 includes a movable support assembly, a drive transmission assembly, and a double-acting cleaning assembly. The movable support assembly forms a horizontal moving pair with the fixed platform 1 through a toothed meshing structure. The movable support assembly includes a support frame 401, whose bottom crossbeam is fixedly connected to a scraper 406 by bolts. The inner sides of the vertical beams at both ends of the support frame 401 are rotatably supported by a drive shaft 404. Drive wheels 403 are fixedly connected to both ends of the drive shaft 404. Toothed racks 405 are fixedly connected to both sides of the fixed platform 1 along the length direction. The outer teeth of the drive wheels 403 and the toothed racks 405 form a meshing transmission pair.

[0043] The drive transmission assembly includes a first drive motor 402 fixedly connected to the end of the support frame 401, and its output shaft is coaxially connected to the end of the transmission shaft 404 via a coupling. The double-acting cleaning assembly includes a plurality of second drive motors 407 arranged at intervals along the length of the crossbeam of the support frame 401, the output shaft of each second drive motor 407 is vertically downward, and a cleaning blade 408 is fixedly connected to the end of the output shaft of each second drive motor 407.

[0044] The cleaning component 4 adopts a modular composite drive design, with the moving support assembly and the drive transmission assembly forming a two-way power coupling system. The vertical beam of the support frame 401 is provided with symmetrically distributed bearing seats, which form a three-point support structure for the transmission shaft 404 through self-aligning roller bearings, ensuring that the meshing surface of the transmission wheel 403 and the toothed rack 405 maintains a constant pressure angle.

[0045] The rotation trajectories of each cleaning blade 408 are staggered and overlapping on the horizontal projection plane, forming a spiral cleaning band covering the full width of the support frame 401.

[0046] The working principle of the positioning mechanism for a stationery printing machine of this utility model is as follows: First, the PVC or acrylic sheet used in stationery is placed on the fixed platform 1. Then, the pressure plates 301 on both sides of the top are moved, causing the top pressure plate 301 to move upward along the positioning shaft 306, placing the PVC or acrylic sheet between the two pressure plates 301. The weight of the top pressure plate 301 itself clamps the PVC or acrylic sheet. When a more stable fixed position is required, the nut on the positioning shaft 306 is rotated, pushing the top pressure plate 301 further. The PVC or acrylic sheet is pressed firmly and tightly. The staggered arc plates 303 press the PVC or acrylic sheet more firmly through the pressure of the return spring 304. By adjusting the bolts on the sliding sleeve 6, the sliding sleeve 6 can slide on the sliding shaft 5. Adjusting the height of the sliding sleeve 6 adjusts the working height of the pressure plate 301. Adjusting the bolts on the sliding shaft 5 makes the sliding shaft 5 slide on the fixed platform 1, thereby adjusting the distance between the two sets of pressure plates 301, so that the two sets of pressure plates 301 can better position and clamp the PVC or acrylic sheet.

[0047] After the PVC or acrylic sheet is pressed, the first drive motor 402 is started. The output end of the first drive motor 402 drives the transmission shaft 404 to rotate. The transmission shaft 404 drives the transmission wheel 403 to rotate. The transmission wheel 403 rotates on the toothed rack 405, causing the support frame 401 to move. At the same time, the second drive motor 407 is started. The output end of the second drive motor 407 drives the cleaning blade 408 to rotate. The cleaning blade 408 and the scraper 406 clean the impurities on the surface of the PVC or acrylic sheet to prevent impurities from affecting normal printing.

[0048] It should be noted that, in actual implementation, the structure depicted in the accompanying drawings is not a fixed or unchanging embodiment. The components of the embodiments of this invention described and shown in these drawings can typically be arranged and designed in various different configurations. Furthermore, the accompanying drawings and abstract drawings are merely illustrative and do not represent the specific structure or actual quantity in a concrete implementation.

[0049] Unless otherwise defined, the technical or scientific terms used herein shall have the ordinary meaning as understood by one of ordinary skill in the art to which this invention pertains. The use of terms such as "a" or "an" in this specification and claims does not necessarily indicate a limitation on quantity. Terms such as "comprising" or "including" mean that the element or component preceding the word encompasses the element or component listed following the word and its equivalents, without excluding other elements or components. Terms such as "connected" or "linked" are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect.

[0050] The exemplary embodiments of the present invention have been described in detail above with reference to preferred embodiments. However, those skilled in the art will understand that various modifications and alterations can be made to the above specific embodiments without departing from the concept of the present invention, and various combinations can be made to the various technical features and structures proposed by the present invention without exceeding the protection scope of the present invention.

Claims

1. A positioning mechanism for a stationery printing machine, characterized in that: It includes a fixed platform (1), on which symmetrically arranged sliding clamping mechanisms (3) are provided on both sides of the top, and the top of the fixed platform (1) is also provided with a movable cleaning component (4); The clamping mechanism (3) includes a symmetrically arranged pressure plate assembly and an elastic clamping assembly, wherein the pressure plate assembly and the fixed table (1) form a vertical sliding fit.

2. The positioning mechanism for a stationery printing machine according to claim 1, characterized in that: The two sets of pressure plate assemblies each include two pressure plates (301) stacked on top of each other. The bottom pressure plate (301) has a positioning shaft (306) fixed at both ends of its top. The top pressure plate (301) has a corresponding guide through hole that slides along the positioning shaft (306). The upper end of the positioning shaft (306) has an internal thread section and is fitted with a clamping nut.

3. The positioning mechanism for a stationery printing machine according to claim 2, characterized in that: The top pressure plate (301) and the bottom pressure plate (301) are respectively provided with staggered arc-shaped pressing plates (303) on their opposite side walls. The arc-shaped pressing plates (303) form an elastic pressing structure with the corresponding pressure plates (301) through an elastic reset component.

4. The positioning mechanism for a stationery printing machine according to claim 3, characterized in that: The elastic clamping assembly includes: The protrusions (302) are evenly distributed on the sidewalls of each pressure plate (301), and a clearance gap is formed between adjacent protrusions (302); Multiple horizontal sliding holes are provided on the side wall of the pressure plate (301), and the arc-shaped pressure plate (303) is in sliding fit with the sliding holes through the anti-deviation shaft (305); The end of the anti-deviation shaft (305) is provided with an annular limiting step. The shaft section of the anti-deviation shaft (305) located in the sliding hole is fitted with a return spring (304). The two ends of the return spring (304) respectively abut against the inner wall of the arc-shaped pressing plate (303) and the bottom surface of the sliding hole. The bottom pressure plate (301) has sliding sleeves (6) fixed at both ends. The sliding sleeves (6) are slidably connected to sliding shafts (5). Each pair of sliding shafts (5) are slidably connected to both sides of the fixed platform (1). The sidewalls of the sliding shafts (5) are fixed with sliders for sliding on the fixed platform (1).

5. The positioning mechanism for a stationery printing machine according to claim 1, characterized in that: The cleaning component (4) includes a movable support assembly, a drive transmission assembly and a dual-acting cleaning assembly. The movable support assembly forms a horizontal moving pair with the fixed table (1) through a toothed meshing structure. The movable support assembly includes a support frame (401), and a scraper (406) is bolted to its bottom crossbeam; The support frame (401) has a transmission shaft (404) rotatably supported on the inner side of the vertical beams at both ends, and a transmission wheel (403) is fixedly connected to both ends of the transmission shaft (404); The fixed platform (1) has toothed strips (405) fixedly connected to both sides along the length direction, and the outer edge teeth of the transmission wheel (403) and the toothed strips (405) form a meshing transmission pair.

6. The positioning mechanism for a stationery printing machine according to claim 5, characterized in that: The drive transmission assembly includes a first drive motor (402) fixed to the end of the support frame (401), and its output shaft is coaxially connected to the end of the transmission shaft (404) via a coupling.

7. The positioning mechanism for a stationery printing machine according to claim 5, characterized in that: The dual-action cleaning assembly includes a plurality of second drive motors (407) arranged at intervals along the length of the crossbeam of the support frame (401), and the output shaft of each second drive motor (407) is set vertically downward; Each of the second drive motors (407) has a cleaning blade (408) fixedly attached to the end of its output shaft.

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