A type of page-holding mechanism

Abstract

This utility model relates to the field of cardboard sheet processing technology, and mainly to a sheet-holding mechanism. It includes: a frame; a pre-opening assembly, including a pre-opening suction cup and a suction cup vertical moving mechanism, the suction cup vertical moving mechanism being mounted on the frame and driving the pre-opening suction cup to move vertically; an opening assembly, including an opening angle rod and an angle rod horizontal moving mechanism, the angle rod horizontal moving mechanism being mounted on the frame and driving the opening angle rod to move horizontally to extend into the opened cardboard sheet; a sheet-holding assembly, including a sheet-holding angle rod and a sheet-holding angle rod adjusting mechanism, the sheet-holding angle rod adjusting mechanism being mounted on the frame, the sheet-holding angle rod being mounted on the sheet-holding angle rod adjusting mechanism, the sheet-holding angle rod being used to abut against the opened cardboard sheet; and a negative pressure conveyor belt, mounted on the frame below the pre-opening suction cup, the negative pressure conveyor belt being used to drive the cardboard sheet to move along the opening angle rod. This mechanism enables efficient opening of cardboard sheets, reduces manual operation, and improves opening efficiency.

Description

Technical Field

[0001] This utility model relates to the field of cardboard sheet processing technology, and mainly to a sheet support mechanism. Background Technology

[0002] Board books are commonly used in children's literature. Compared to regular cardboard pages, they are thicker and stronger. Therefore, after a series of processing steps, these books are usually stored by folding them in half. However, when they need to enter the subsequent production stage, the folded cardboard pages often need to be manually unfolded and inserted, a labor-intensive and inefficient process. Therefore, the existing technology still needs improvement and development. Utility Model Content

[0003] In view of the shortcomings of the prior art, the purpose of this utility model is to provide a page-holding mechanism, which aims to solve the problem that the opening process of existing cardboard pages is labor-intensive and inefficient.

[0004] The technical solution of this utility model is as follows: This utility model provides a page-holding mechanism, including a frame, wherein the page-holding mechanism further includes: The pre-opening component includes a pre-opening suction cup and a suction cup vertical moving mechanism. The suction cup vertical moving mechanism is mounted on the frame and drives the pre-opening suction cup to move vertically. The page opening assembly includes a page opening slant bar and a slant bar lateral movement mechanism. The slant bar lateral movement mechanism is mounted on the frame and drives the page opening slant bar to move laterally to extend into the opened cardboard sheet. A page-carrying assembly, comprising a page-carrying slant bar and a page-carrying slant bar adjusting mechanism, wherein the page-carrying slant bar is mounted on the frame and the page-carrying slant bar is mounted on the page-carrying slant bar adjusting mechanism, and the page-carrying slant bar is used to abut against the unfolded cardboard page; A negative pressure conveyor belt is installed on the frame, located below the pre-opening suction cup, and is used to drive the cardboard sheet to move along the opening angle bar. Furthermore, the page support tilt bar adjustment mechanism includes: A page holder mounting rod is rotatably mounted on the frame. A page holder connecting rod is rotatably mounted on the side of the page holder mounting rod, and the page holder inclined rod is detachably connected to the page holder connecting rod. Furthermore, the pre-opening assembly also includes a pre-opening adjustment mechanism, and the suction cup vertical moving mechanism is connected to the frame through the pre-opening adjustment mechanism; The pre-opening adjustment mechanism includes: A pre-opening mounting rod is provided, which is detachably connected to the frame, and a first pre-opening adjustment groove is provided on the pre-opening mounting rod; A pre-opening adjustment slider is slidably connected to the first pre-opening adjustment groove, and a pre-opening adjustment screw hole is provided on the pre-opening adjustment slider; A pre-opening adjustment plate, wherein a second pre-opening adjustment groove is provided on the pre-opening adjustment plate; The first pre-opened adjustment slot is not parallel to the second pre-opened adjustment slot; A pre-opening adjustment screw passes through the second pre-opening adjustment groove and is threadedly connected to the pre-opening adjustment slider, thereby detachably locking the pre-opening adjustment plate onto the pre-opening mounting rod. The suction cup vertical moving mechanism is disposed on the pre-opening adjustment plate. Furthermore, the page opening component also includes: An adjusting screw is mounted on the frame, and a handwheel is provided at one end of the screw. A slant bar adjusting block is fixedly connected to the slant bar lateral movement mechanism, and the slant bar adjusting block is threadedly engaged with the adjusting screw. Furthermore, the page opening component also includes: The page opening adjustment plate is provided with a page opening adjustment groove, and the inclined rod adjustment block is provided with a page opening adjustment screw hole. The inclined rod adjustment block is fixedly connected to the inclined rod lateral movement mechanism through the page opening adjustment plate. The page-opening adjustment screw passes through the page-opening adjustment groove and is threadedly connected to the page-opening adjustment screw hole, thereby detachably locking the page-opening adjustment plate onto the slant rod adjustment block. Furthermore, a positioning plate is provided on the frame, the positioning plate is located beside the negative pressure conveyor belt, and the positioning plate includes a positioning surface parallel to the negative pressure conveyor belt; The positioning plate is detachably connected to the frame. Furthermore, the positioning plate is provided with a limiting block, which is used to abut against the opened cardboard page. Furthermore, the page-holding mechanism also includes a paper-pressing assembly, which includes: A connecting rod is mounted on the frame and has a locking block on it; A paper-pressing spring is disposed on the card block; A paper-pressing roller is rotatably mounted on a paper-pressing spring, which provides the paper-pressing roller with elastic force toward the negative pressure conveyor belt.

[0005] Beneficial Effects: In this invention, by setting a negative pressure conveyor belt, the folded cardboard sheet can be held in place on one side. By setting a pre-opening assembly, the folded cardboard sheet can be pre-opened to allow the subsequent opening rod to enter a gap. The position of the pre-opening suction cup is adjusted by the pre-opening adjustment mechanism, and the cardboard sheet is attracted by the pre-opening suction cup. Then, the suction cup vertical moving mechanism drives the pre-opening suction cup to move vertically, opening a suitable gap on the other side of the folded cardboard sheet. The pre-opening suction cup releases the cardboard sheet, and then the opening rod moving mechanism inserts the opening rod into the opened gap. The cardboard sheet is then guided and conveyed along the opening rod by the negative pressure conveyor belt, thus opening the folded cardboard sheet. After opening, the cardboard sheet is supported by a supporting assembly, preventing displacement and ensuring the accuracy of subsequent processing. The design of this utility model enables efficient opening of cardboard pages, reduces manual operation, and improves opening efficiency. By setting up a page support component, it can flexibly adapt to cardboard pages of different sizes, and promptly support the opened cardboard pages, which helps to ensure the required opening effect. Attached Figure Description

[0006] Figure 1 This is one of the structural schematic diagrams of the page-supporting mechanism of this utility model.

[0007] Figure 2 This is the second schematic diagram of the page-supporting mechanism of this utility model.

[0008] Figure 3 This is the third schematic diagram of the page-supporting mechanism of this utility model.

[0009] Labeling Explanation: 100, Frame; 200, Pre-opening assembly; 210, Pre-opening suction cup; 220, Suction cup vertical movement mechanism; 230, Pre-opening adjustment mechanism; 231, Pre-opening mounting rod; 232, First pre-opening adjustment slot; 233, Pre-opening adjustment slider; 234, Pre-opening adjustment screw hole; 235, Pre-opening adjustment plate; 236, Second pre-opening adjustment slot; 300, Opening assembly; 310, Opening diagonal bar; 320, Diagonal bar lateral movement mechanism; 330, Adjustment Screw; 331, Handwheel; 340, Diagonal bar adjusting block; 350, Page opening adjustment plate; 351, Page opening adjustment slot; 400, Negative pressure conveyor belt; 500, Positioning plate; 510, Limiting block; 600, Paper pressing assembly; 610, Connecting rod; 620, Locking block; 630, Paper pressing spring; 640, Paper pressing wheel; 700, Page carrying mechanism; 710, Page carrying diagonal bar; 720, Page carrying diagonal bar adjusting mechanism; 721, Page carrying mounting rod; 722, Page carrying connecting rod. Detailed Implementation

[0010] This utility model provides a page-holding mechanism. To make the purpose, technical solution, and effects of this utility model clearer and more explicit, the following provides a more detailed description of this utility model. It should be understood that the specific embodiments described herein are merely illustrative of this utility model and are not intended to limit this utility model.

[0011] Reference Figures 1-3 This utility model provides a page-holding mechanism, including a frame 100, wherein the page-holding mechanism further includes: The pre-opening component 200 includes a pre-opening suction cup 210 and a suction cup vertical moving mechanism 220. The suction cup vertical moving mechanism 220 is mounted on the frame 100 and drives the pre-opening suction cup 210 to move vertically. The opening assembly 300 includes an opening slant bar 310 and a slant bar lateral movement mechanism 320. The slant bar lateral movement mechanism 320 is mounted on the frame 100. The slant bar lateral movement mechanism 320 drives the opening slant bar 310 to move laterally so as to extend into the opened cardboard sheet. The page-carrying assembly 700 includes a page-carrying angle bar 710 and a page-carrying angle bar adjusting mechanism 720. The page-carrying angle bar adjusting mechanism 720 is mounted on the frame 100, and the page-carrying angle bar 710 is mounted on the page-carrying angle bar adjusting mechanism 720. The page-carrying angle bar 710 is used to abut against the unfolded cardboard page. The negative pressure conveyor belt 400 is mounted on the frame 100 and located below the pre-opening suction cup 210. The negative pressure conveyor belt 400 is used to drive the cardboard sheet to move along the opening diagonal bar 310.

[0012] In this invention, a negative pressure conveyor belt 400 is used to maintain suction on one side of the folded cardboard sheet. A pre-opening assembly 200 pre-opens the folded cardboard sheet to allow the subsequent opening angle bar 310 to enter. The pre-opening suction cup 210 suctions the cardboard sheet, and the vertical moving mechanism 220 drives the pre-opening suction cup 210 to move vertically, opening a suitable gap on the other side of the folded cardboard sheet. The pre-opening suction cup 210 releases the cardboard sheet, and the horizontal moving mechanism 320 inserts the opening angle bar 310 into the opened gap. The cardboard sheet is then guided and conveyed along the opening angle bar 310 by the negative pressure conveyor belt 400, allowing the folded cardboard sheet to be opened. After opening, the cardboard sheet is supported by a support assembly 700, preventing displacement and ensuring the accuracy of subsequent processing.

[0013] In this invention, after the opened cardboard page crosses the vertically upward direction, it will accelerate under its own weight until it falls and stops on the bearing platform of the page opener. This accelerated falling and rapid stopping process can easily cause the entire cardboard page to shift, especially for heavier cardboard books. If this shift is not addressed promptly, it can affect the subsequent processing accuracy of the cardboard page. This invention, by setting a page-supporting inclined rod 710, can abut the opened cardboard page, preventing it from falling rapidly. By supporting the opened cardboard page with the inclined rod 710 and slowly lowering it, the cardboard page is prevented from falling directly after being opened, which helps to ensure the processing accuracy of the cardboard page.

[0014] The design of this utility model enables efficient opening of cardboard pages, reduces manual operation, and improves opening efficiency. By setting the page support component 700, it can flexibly adapt to cardboard pages of different sizes and promptly support the opened cardboard pages, which helps to ensure the required opening effect.

[0015] Specifically, the orientation and tilt direction of the page opening angle bar 310 and the page support angle bar 710 correspond to the conveying direction of the negative pressure conveyor belt 400. Specifically, the page opening angle bar 310 tilts upward in the conveying direction of the negative pressure conveyor belt 400, and the page support angle bar 710 tilts downward in the conveying direction of the negative pressure conveyor belt 400.

[0016] The negative pressure conveyor belt 400 uses negative pressure holes to apply negative pressure to the cardboard sheets, which facilitates the transport of the cardboard sheets via the negative pressure conveyor belt 400. The negative pressure holes of the negative pressure conveyor belt 400 and the negative pressure effect of the pre-opening suction cup 210 can be achieved by connecting with the suction pipe connected to the negative pressure source, which can be a compressor, vacuum generator, etc. Specifically, the suction cup vertical moving mechanism 220 and the diagonal bar horizontal moving mechanism 320 can be powered by a cylinder or other power source.

[0017] In one specific embodiment of this utility model, the page support tilt bar adjustment mechanism 720 includes: Page mounting rod 721 is rotatably mounted on frame 100; The page holder connecting rod 722 is rotatably mounted on the side of the page holder mounting rod 721, and the page holder inclined rod 710 is detachably connected to the page holder connecting rod 722.

[0018] In this invention, the page-supporting inclined rod 710 is detachably connected to the page-supporting inclined rod adjustment mechanism 720. By rotating the page-supporting mounting rod 721, the extension length of the page-supporting inclined rod 710 can be adjusted to accommodate different sizes of cardboard pages and ensure timely contact. By rotating the page-supporting connecting rod 722, the inclination of the page-supporting inclined rod 710 can be adjusted to ensure the smooth opening of the cardboard pages.

[0019] In one specific embodiment of this utility model, the pre-opening page assembly 200 further includes a pre-opening adjustment mechanism 230, and the suction cup vertical moving mechanism 220 is connected to the frame 100 through the pre-opening adjustment mechanism 230; The pre-opening adjustment mechanism 230 includes: A pre-opening mounting rod 231 is detachably connected to the frame 100, and a first pre-opening adjustment groove 232 is provided on the pre-opening mounting rod 231. A pre-opening adjustment slider 233 is slidably connected to a first pre-opening adjustment groove 232, and a pre-opening adjustment screw hole 234 is provided on the pre-opening adjustment slider 233. A pre-opening adjustment plate 235 is provided, and a second pre-opening adjustment groove 236 is provided on the pre-opening adjustment plate 235; The first pre-opened adjustment slot 232 is not parallel to the second pre-opened adjustment slot 236; A pre-opening adjustment screw (not shown in the figure) passes through the second pre-opening adjustment groove 236 and is threadedly connected to the pre-opening adjustment slider 233, thereby detachably locking the pre-opening adjustment plate 235 onto the pre-opening mounting rod 231. The suction cup vertical moving mechanism 220 is set on the pre-opening adjustment plate 235.

[0020] In this invention, a pre-opening mounting rod 231 is provided to facilitate the installation and adjustment of the pre-opening suction cup 210. A first pre-opening adjustment groove 232 is provided on the pre-opening mounting rod 231, which can be vertically oriented. By adjusting the locking position of the pre-opening adjustment slider 233 connected to it, the vertical position of the pre-opening adjustment plate 235 can be adjusted. Furthermore, by adjusting the locking position of the pre-opening adjustment screw in the second pre-opening adjustment groove 236, the extension length of the pre-opening adjustment plate 235 can be adjusted, allowing the pre-opening suction cup 210 to adhere to a suitable position on the cardboard sheet. Based on the torque of the cardboard sheet, it adheres near the opening, making it easier to open. By adjusting the locking angle of the second pre-opening adjustment groove 236, the vertical position and orientation angle of the pre-opening suction cup 210 can be adjusted. This simple adjustment allows for adaptation to cardboard sheets of different sizes, thus meeting the opening requirements of various products.

[0021] Specifically, during the unfolding process of a folded cardboard sheet, since one side is generally conveyed by a horizontal negative pressure conveyor belt 400, and the other side unfolds around the fold, the angle of the cardboard sheet continuously changes during unfolding. If the movement of the pre-opening suction cup 210 is simply straight up and down, the cardboard sheet may detach prematurely as it continuously adheres to the cardboard sheet and moves upward because the suction cup is not adapted to the angle changes of the adhesion surface. In this invention, by setting a pre-opening adjustment mechanism 230, the position and angle of the pre-opening suction cup 210 can be easily adjusted to better adapt to cardboard sheets of different sizes. By setting a certain tilt angle of the suction cup toward the cardboard sheet, when the pre-opening suction cup 210 is driven upward by the vertical moving mechanism 220, it is more adapted to the angle changes of the adhesion surface of the cardboard sheet, which helps to ensure the pre-opening effect of the cardboard sheet.

[0022] The pre-opening suction cup 210 can be made of flexible material, and a corrugated telescopic section is set at the suction port, which helps to ensure the suction effect of the pre-opening suction cup 210 on the cardboard sheet.

[0023] In one specific embodiment of this utility model, the page opening component 300 further includes: An adjusting screw 330 is mounted on the frame 100, and a handwheel 331 is provided at one end of it; The inclined rod adjusting block 340 is fixedly connected to the inclined rod lateral moving mechanism 320, and the inclined rod adjusting block 340 is threadedly engaged with the adjusting screw 330.

[0024] The adjusting screw 330 is rotated by turning a handwheel 331 at one end of the adjusting screw 330.

[0025] In this utility model, the diagonal bar lateral movement mechanism 320 is fixedly connected to the diagonal bar adjusting block 340. By setting the adjusting screw 330 and the diagonal bar adjusting block 340 that cooperates with the screw, the position of the diagonal bar adjusting block 340 can be finely adjusted when the handwheel 331 is turned, and the adjustment accuracy is higher, so as to adapt to different sizes of cardboard sheets. It is also easy to adjust the required opening degree during the opening process to ensure opening efficiency.

[0026] In one specific embodiment of this utility model, the page opening component 300 further includes: The page opening adjustment plate 350 is provided with a page opening adjustment groove 351, and the diagonal rod adjustment block 340 is provided with a page opening adjustment screw hole (not shown in the figure). The diagonal rod adjustment block 340 is fixedly connected to the diagonal rod lateral movement mechanism 320 through the page opening adjustment plate 350. The page adjustment screw (not shown in the figure) passes through the page adjustment groove 351 and is threaded into the page adjustment screw hole, thereby detachably locking the page adjustment plate 350 onto the diagonal rod adjustment block 340.

[0027] In this utility model, by providing a page opening adjustment screw hole on the diagonal bar adjustment block 340, it is convenient to lock the position of the page opening adjustment plate 350 by using the page opening adjustment screw. By providing a page opening adjustment groove 351 on the page opening adjustment plate 350, it is convenient to adjust the initial position of the page opening diagonal bar 310. This is beneficial to meet the production requirements of continuous page opening of paperboard sheets and is also easy to adjust to adapt to paperboard sheets of different sizes.

[0028] In one specific embodiment of this utility model, a positioning plate 500 is provided on the frame 100. The positioning plate 500 is located beside the negative pressure conveyor belt 400, and the positioning plate 500 includes a positioning surface parallel to the negative pressure conveyor belt 400. The positioning plate 500 is detachably connected to the frame 100.

[0029] In this invention, a positioning plate 500 is provided on the side of the negative pressure conveyor belt 400 so that the cardboard sheet is positioned when it is fed into the negative pressure conveyor belt 400, allowing it to be opened at the appropriate position. The positioning surface facilitates the installation of the positioning plate 500, and the detachable connection facilitates the adjustment of its position.

[0030] Specifically, the positioning plate 500 may also be equipped with a detection mechanism facing the cardboard sheet. After detecting that the cardboard sheet has reached the positioning plate 500, the vertical moving mechanism 220 of the suction cup is activated, and after detecting that the cardboard sheet has been opened to a certain extent, the horizontal moving mechanism 320 of the diagonal bar is activated and the negative pressure source of the pre-opening suction cup 210 is stopped.

[0031] In one specific embodiment of this utility model, a limiting block 510 is provided on the positioning plate 500, and the limiting block 510 is used to abut against the opened cardboard page.

[0032] In this invention, after the pre-opening suction cup 210 pre-opens the gap of the cardboard sheet, the opening angle bar 310 enters the gap for subsequent opening operations. Therefore, the pre-opening suction cup 210 needs to detach promptly after the opening angle bar 310 enters the cardboard sheet. During the pre-opening process of the cardboard sheet being pre-opened by the pre-opening suction cup 210 while it is moving upwards, even if the negative pressure of the pre-opening suction cup 210 is stopped, the suction cup's structural design makes it easy to maintain the suction on the cardboard sheet. This is especially true for lighter and smaller cardboard sheets, which cannot detach from the pre-opening suction cup 210 by their own weight. Using a blowing mechanism for detachment would be too complex. This invention addresses this by setting a limiting block 510. After the cardboard sheet is opened to a certain extent, it is stopped by the limiting block 510. The limiting block 510 stops the cardboard sheet moving with the pre-opening suction cup 210, allowing the pre-opening suction cup 210 to continue moving upwards and detaching. The limiting block 510 facilitates the detachment of the cardboard sheet without affecting its overall position.

[0033] In one specific embodiment of this utility model, the page-holding mechanism further includes a paper-pressing assembly 600, which includes: A connecting rod 610 is mounted on the frame 100, and a locking block 620 is mounted on the connecting rod 610. Paper-pressing spring 630 is set on card block 620; The pressure roller 640 is rotatably mounted on the pressure spring 630, which provides the pressure roller 640 with elastic force toward the negative pressure conveyor belt 400.

[0034] In this invention, during the continuous opening process of the cardboard sheets, a certain negative pressure is maintained between the cardboard sheets. This negative pressure also causes the cardboard sheets adsorbed on the negative pressure conveyor belt 400 to tend towards the opening of the cardboard sheets. By setting up a pressure roller 640 and a pressure spring 630, the pressure spring 630 can apply an elastic force towards the negative pressure conveyor belt 400 as the cardboard sheets pass through, maintaining the adsorption effect of the negative pressure conveyor belt 400 on the cardboard sheets, avoiding lateral displacement, and ensuring the opening effect and accuracy.

[0035] Specifically, the number of pressure rollers 640 can be set to two or more, along with a corresponding number of pressure springs 630 and clamping blocks 620. The interval between the pressure rollers at both ends can be set according to the length of the cardboard sheet. Setting only one pressure roller 640 can easily lead to uneven elasticity received by different areas on the cardboard sheet. When the elasticity of the pressure spring 630 is high, it may even cause the cardboard sheet to curl up. By setting pressure rollers 640 corresponding to the length of the cardboard sheet, it is beneficial to ensure the smooth passage of the cardboard sheet on the negative pressure conveyor belt 400.

[0036] The position of the pressure roller 640 can be adjusted by adjusting the buckle position of the locking block 620 on the connecting rod 610, so as to adapt to different sizes of paperboard sheets.

[0037] The working principle of the page-holding mechanism of this utility model is as follows: Based on the required size of the cardboard sheet to be opened, the initial position of the opening angle bar 310 is adjusted. The initial position of the pre-opening suction cup 210 is adjusted using the pre-opening adjustment mechanism 230, and the position of the pressure roller 640 is adjusted. The height of the pre-opening adjustment plate 235 is adjusted by adjusting the appropriate position of the pre-opening adjustment slider 233 on the first pre-opening adjustment groove 232. Then, by adjusting the pre-opening adjustment screw to a suitable position passing through the second pre-opening adjustment groove 236 and rotating the pre-opening adjustment plate 235 to a suitable tilt angle, the pre-opening adjustment screw passes through the second pre-opening adjustment groove 236 and engages with the pre-opening adjustment screw hole 234, thus locking the initial position of the pre-opening suction cup 210. By passing the opening adjustment screw through the opening adjustment slot 351 to the appropriate position and engaging with the opening adjustment screw hole, the opening adjustment plate 350 is locked. Then, by rotating the handwheel 331 and adjusting the screw 330, the inclined rod adjustment block 340 is adjusted to the appropriate position, completing the initial locking of the opening inclined rod 310. By adjusting the latching position of the locking block 620 on the connecting rod 610, the spacing of the two paper pressure rollers 640 at both ends is adjusted to correspond to the length of the paperboard. The initial position of the page-carrying inclined rod 710 is adjusted according to the size of the paperboard. By rotating the rotation angle of the page-carrying mounting rod 721, the extension length of the page-carrying inclined rod 710 is adjusted. By rotating the rotation angle of the page-carrying connecting rod 722, the tilt angle of the page-carrying inclined rod 710 is adjusted to correspond to the paperboard that needs to be flipped down.

[0038] After preparation, when the folded cardboard sheet is sent to the negative pressure conveyor belt 400 via the front conveyor mechanism, the folded part of the cardboard sheet abuts against the positioning plate 500, completing the positioning. At this time, one side of the bottom surface of the cardboard sheet is fixed by the negative pressure conveyor belt 400 through the negative pressure action. The pre-opening suction cup 210 is driven to move down by the suction cup vertical moving mechanism 220 until it abuts against one side of the cardboard sheet surface. The negative pressure action of the pre-opening suction cup 210 adsorbs one side of the cardboard sheet surface. Then, the pre-opening suction cup 210 is driven to move up by the suction cup vertical moving mechanism 220 to complete the pre-opening action of the cardboard sheet. At this time, the cardboard sheet is opened with a certain gap. The lateral movement mechanism 320 drives the opening slant bar 310 to move laterally into the pre-opening gap of the cardboard sheet. As the pre-opening suction cup 210 moves upward, the negative pressure source of the pre-opening suction cup 210 stops after it reaches a certain height. At this time, the cardboard sheet can detach from the pre-opening suction cup 210 under its own weight. Even if the cardboard sheet fails to detach by its own weight, it will be stopped by the limiting block 510 on the positioning plate 500 as it continues to open upward with the pre-opening suction cup 210, thus completing the detachment. At this time, the pre-opening suction cup 210 resets and stops after moving upward to a suitable height. The pre-opening action is repeated after the next folded cardboard sheet is fed in.

[0039] After the cardboard sheet detaches from the pre-opening suction cup 210, the pre-opened cardboard sheet rests against the opening angle bar 310, which is inclined upwards. The negative pressure conveyor belt 400 then drives the cardboard sheet to move along the opening angle bar 310. During this process, the cardboard sheet on the negative pressure conveyor belt 400 passes through the pressure roller 640, and the pressure spring 630 applies a spring force towards the negative pressure conveyor belt 400 to maintain the cardboard sheet's fixation on the negative pressure conveyor belt 400. The pre-opened cardboard sheet is opened more fully by the opening angle bar 310 until one side of the cardboard sheet is fully opened, completing the smooth opening of the folded cardboard sheet. After the opening is completed, the angle bar lateral movement mechanism 320 drives the opening angle bar 310 to reset and stop. The opening action is repeated after the next folded cardboard sheet is pre-opened, achieving continuous and efficient opening of the cardboard sheet.

[0040] During the opening process via the opening angle bar 310 in the page-supporting mechanism, the negative pressure conveyor belt 400 maintains the conveying. After the opened cardboard sheet is opened to the moving height via the opening angle bar 310, the cardboard sheet crosses the vertical upward direction and begins to fall under its own weight. At this time, it promptly comes into contact with the page-supporting angle bar 710, stopping the acceleration process. The smooth falling is achieved by the guidance of the page-supporting angle bar 710, avoiding the displacement of the cardboard sheet caused by the accelerated falling process, until the cardboard sheet is conveyed away from the page-supporting angle bar 710 by the negative pressure conveyor belt 400, thus completing the good support effect for the opened cardboard sheet and preventing displacement.

[0041] It should be understood that the application of this utility model is not limited to the examples above. Those skilled in the art can make improvements or modifications based on the above description, and all such improvements and modifications should fall within the protection scope of this utility model.

Claims

1. A page-holding mechanism, comprising a frame (100), characterized in that, The page-supporting mechanism also includes: The pre-opening component (200) includes a pre-opening suction cup (210) and a suction cup vertical moving mechanism (220). The suction cup vertical moving mechanism (220) is mounted on the frame (100) and drives the pre-opening suction cup (210) to move vertically. The opening assembly (300) includes an opening slant bar (310) and a slant bar lateral movement mechanism (320). The slant bar lateral movement mechanism (320) is disposed on the frame (100). The slant bar lateral movement mechanism (320) drives the opening slant bar (310) to move laterally to extend into the opened cardboard sheet. A page-carrying assembly (700) includes a page-carrying slant bar (710) and a page-carrying slant bar adjusting mechanism (720). The page-carrying slant bar adjusting mechanism (720) is disposed on the frame (100), and the page-carrying slant bar (710) is disposed on the page-carrying slant bar adjusting mechanism (720). The page-carrying slant bar (710) is used to abut against the opened cardboard page. A negative pressure conveyor belt (400) is disposed on the frame (100) and located below the pre-opening suction cup (210). The negative pressure conveyor belt (400) is used to drive the cardboard sheet to move along the opening diagonal bar (310).

2. The page-supporting mechanism according to claim 1, characterized in that, The page holder adjustment mechanism (720) includes: A page holder mounting rod (721) is rotatably mounted on the frame (100); The page holder connecting rod (722) is rotatably disposed on the side of the page holder mounting rod (721), and the page holder inclined rod (710) is detachably connected to the page holder connecting rod (722).

3. The page-supporting mechanism according to claim 1, characterized in that, The pre-opening assembly (200) further includes a pre-opening adjustment mechanism (230), and the suction cup vertical moving mechanism (220) is connected to the frame (100) through the pre-opening adjustment mechanism (230); The pre-opening adjustment mechanism (230) includes: A pre-opening mounting rod (231) is provided, which is detachably connected to the frame (100). A first pre-opening adjustment groove (232) is provided on the pre-opening mounting rod (231). A pre-opening adjustment slider (233) is slidably connected to the first pre-opening adjustment groove (232), and a pre-opening adjustment screw hole (234) is provided on the pre-opening adjustment slider (233). A pre-opening adjustment plate (235) is provided with a second pre-opening adjustment groove (236). The first pre-opened adjustment slot (232) is not parallel to the second pre-opened adjustment slot (236); A pre-opening adjustment screw passes through the second pre-opening adjustment groove (236) and is threadedly connected to the pre-opening adjustment slider (233), thereby detachably locking the pre-opening adjustment plate (235) onto the pre-opening mounting rod (231). The suction cup vertical moving mechanism (220) is mounted on the pre-opening adjustment plate (235).

4. The page-supporting mechanism according to claim 1, characterized in that, The page opening component (300) also includes: An adjusting screw (330) is mounted on the frame (100), and a handwheel (331) is mounted on one end of the screw. The inclined rod adjusting block (340) is fixedly connected to the inclined rod lateral moving mechanism (320), and the inclined rod adjusting block (340) is threadedly engaged with the adjusting screw (330).

5. The page-supporting mechanism according to claim 4, characterized in that, The page opening component (300) also includes: The page opening adjustment plate (350) is provided with a page opening adjustment groove (351), and the inclined rod adjustment block (340) is provided with a page opening adjustment screw hole. The inclined rod adjustment block (340) is fixedly connected to the inclined rod transverse moving mechanism (320) through the page opening adjustment plate (350). The page opening adjustment screw passes through the page opening adjustment groove (351) and is threadedly connected to the page opening adjustment screw hole, thereby detachably locking the page opening adjustment plate (350) onto the slant rod adjustment block (340).

6. The page-supporting mechanism according to claim 1, characterized in that, A positioning plate (500) is provided on the frame (100), the positioning plate (500) is located on the side of the negative pressure conveyor belt (400), and the positioning plate (500) includes a positioning surface parallel to the negative pressure conveyor belt (400); The positioning plate (500) is detachably connected to the frame (100).

7. The page-supporting mechanism according to claim 6, characterized in that, The positioning plate (500) is provided with a limiting block (510), which is used to abut against the opened cardboard page.

8. The page-supporting mechanism according to claim 1, characterized in that, The page-holding mechanism further includes a paper-pressing assembly (600), which includes: A connecting rod (610) is mounted on the frame (100), and a locking block (620) is mounted on the connecting rod (610). A paper-pressing spring (630) is disposed on the card block (620); A pressure roller (640) is rotatably mounted on a pressure spring (630), which provides the pressure roller (640) with elastic force toward the negative pressure conveyor belt (400).

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