A roller gripper paper positioning device

Abstract

This utility model discloses a roller gripper paper positioning device, including a roller with an installation groove. A gripper pad is installed on the inner side of the installation groove near the paper feed end. A sliding groove is provided on the gripper pad, and a liftable positioning pin is installed in the sliding groove. Elastic elements are installed on the inner bottom wall of the sliding groove and the bottom of the positioning pin. A rotatable roller gripper is installed in the installation groove, and a pressure plate corresponding to the gripper pad and positioning pin is installed on the roller gripper. An inclined part is provided on the top of the gripper pad, and the inclined part and the inner side wall of the installation groove form a storage groove to accommodate the pressure plate. The beneficial effects of this utility model are: by setting the inclined part and the storage groove formed by the inner side wall of the installation groove, the pressure plate on the roller gripper can be stored. During the operation of the roller rotation, the upper surface of the roller gripper and the positioning pin is located in the installation groove, lower than the surface of the roller, thereby preventing the roller gripper from damaging the print head during the roller rotation, and meeting the requirements of subsequent efficiency enhancement processes.

Description

Technical Field

[0001] This utility model relates to the field of roller paper gripper technology, and in particular to a roller paper gripper positioning device. Background Technology

[0002] Paper grippers are metal components in printing machinery used for the precise transfer and handover of paper, and their function directly affects the quality of printed products. This component ensures paper handover accuracy by adjusting parameters such as opening and closing time and gripping force, and requires regular maintenance to prevent wear or breakage due to mechanical fatigue. As a core component of sheetfed offset printing presses, paper grippers comprise three systems: the feed gripper, the impression cylinder gripper, and the paper feeder gripper. Their structural characteristics are closely related to the matching degree of cylinder linear speed. In the printing process, improper adjustment of the gripper's gripping force uniformity and gripper shaft tightness can lead to misregistration, paper wrinkling, and other malfunctions. In sheetfed offset printing presses, paper grippers are divided into three systems: the feed gripper, the impression cylinder gripper, and the paper feeder gripper. Spring compression generates a gripping positive pressure to fix the paper. In the closed state, the gripper plates and gripper pads maintain zero-gap contact to ensure paper transfer without slippage.

[0003] Some existing digital inkjet printing equipment uses a steel plate fixed at the roller teeth for paper positioning. The top of the steel plate is higher than the outer surface of the roller and rotates with the roller. This makes it easy for the inkjet head to be hit and damaged when the roller rotates. Furthermore, when the paper has subsequent enhancement processes, it is required that there are no high points on the outer surface of the roller when it rotates, which does not meet the requirements of the subsequent enhancement processes. Utility Model Content

[0004] The purpose of this invention is to overcome the shortcomings of some existing digital inkjet printing equipment where the paper head positioning device is a steel plate fixed at the roller teeth for positioning. The top of the steel plate is higher than the outer surface of the roller and rotates with the roller. This makes it easy to hit the inkjet head and cause damage when the roller rotates. Furthermore, when the paper has subsequent enhancement processes, it is required that there are no high points on the outer surface of the roller when it rotates, which does not meet the requirements of the subsequent enhancement processes. This invention provides a roller teeth paper positioning device.

[0005] The purpose of this utility model is achieved through the following technical solution: a roller gripper paper positioning device, including a roller, an installation groove is provided on the roller, a gripper pad is installed on the inner side of the installation groove near the paper feed end, a sliding groove is provided on the gripper pad, a liftable positioning pin is installed in the sliding groove, an elastic element is installed on the inner bottom wall of the sliding groove and the bottom of the positioning pin, the upper part of the positioning pin extends out of the top of the gripper pad, a rotatable roller gripper is installed in the installation groove, and a pressure plate corresponding to the gripper pad and the positioning pin is provided on the roller gripper;

[0006] The top of the dental pad is provided with an inclined section, which forms a storage groove with the inner wall of the mounting groove to accommodate the pressure plate.

[0007] By setting an inclined part and forming a storage groove with the inner side wall of the mounting groove, the pressure plate on the roller gripper can be stored. During the operation of the roller rotation, the upper surface of the roller gripper and the positioning pin is located in the mounting groove and is lower than the surface of the roller, thereby preventing the roller gripper from damaging the print head during the rotation of the roller, and at the same time meeting the usage requirements of subsequent efficiency enhancement processes.

[0008] A further technical solution involves having a top plate corresponding to the paper on the top of the positioning pin, and a groove corresponding to the top plate on the bottom surface of the pressure plate. By setting the top plate on the positioning pin, the incoming paper can be effectively blocked, thus facilitating the subsequent fixing of the paper head by the pressure plate and improving the accuracy of paper positioning.

[0009] A further technical solution involves using a helical spring as the elastic element. The upper part of the elastic element is connected to the bottom wall of the positioning pin. A set screw is installed at the bottom of the spring groove, and the lower part of the elastic element is connected to the upper part of the set screw. By setting the elastic element to a helical spring, the positioning pin can be retracted into the groove during the closing process of the roller gripper. After the paper processing is completed, the roller gripper rises and lifts under the drive of the tooth shaft. At this time, the positioning pin pushes out the paper head under the elastic action of the elastic element, thus facilitating the disassembly of the paper. The set screw can adjust the elastic force of the helical spring by adjusting the depth of the set screw in the groove, thus meeting the elastic pressure requirements between the positioning pin and the roller gripper.

[0010] A further technical solution is that the mounting slot is equipped with a rotatable toothed shaft, the roller gripper is mounted on the toothed shaft, one side of the toothed shaft extends outside the mounting slot and is connected to an external power source, the roller gripper is detachably connected to the toothed shaft, the rotation of the roller gripper is controlled by setting the toothed shaft to be connected to an external power source, and the detachable connection between the roller gripper and the toothed shaft facilitates the disassembly and replacement of the roller gripper.

[0011] A further technical solution is to have the top of the pressure plate set in an arc shape, so that the tooth shaft can drive the pressure plate on the roller gripper to rotate into the storage slot. By setting the top of the pressure plate in an arc shape, it is easier for the pressure plate to be stored in the storage slot, further avoiding collision between the roller gripper and the external print head, and improving the safety of the equipment during operation.

[0012] A further technical solution is to provide two sets of mounting slots on the roller, which are symmetrically arranged about the roller. By providing two sets of mounting slots, the position of the roller can be easily adjusted, making it easier for the paper to find the mounting slot for positioning during the feeding process, thus improving the convenience of operation.

[0013] This utility model has the following advantages: By setting an inclined part and a storage groove formed by the inner side wall of the mounting groove, the pressure plate on the roller gripper can be stored. During the operation of the roller rotation, the upper surface of the roller gripper and the positioning pin is located in the mounting groove and is lower than the surface of the roller, thereby preventing the roller gripper from damaging the print head during the rotation of the roller. At the same time, it meets the usage requirements of subsequent efficiency enhancement processes. By setting a top plate on the positioning pin, the incoming paper can be effectively blocked, which facilitates the subsequent pressure plate to fix the paper head and improves the accuracy of paper positioning. Attached Figure Description

[0014] Figure 1 This is a cross-sectional view of the overall structure of this utility model;

[0015] Figure 2 For the present utility model Figure 1 Enlarged schematic diagram of structure A in the middle;

[0016] Figure 3 This is a schematic diagram of the closed state of the roller gripper of this utility model;

[0017] Figure 4 This is a schematic diagram of the three-dimensional structure of the roller gripper of this utility model;

[0018] Figure 5 This is a three-dimensional structural diagram of the positioning pin of this utility model;

[0019] In the diagram, 1. Tooth pad; 2. Positioning pin; 3. Elastic element; 4. Roller tooth holder; 5. Tooth shaft; 6. Roller; 7. Paper; 8. Mounting groove; 9. Slide groove; 10. Pressure plate; 11. Inclined part; 12. Top plate; 13. Set screw; 14. Groove. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can typically be arranged and designed in various different configurations.

[0021] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0022] It should be noted that, where there is no conflict, the embodiments and features in the embodiments of this utility model can be combined with each other.

[0023] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0024] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this utility model is in use, or the orientation or positional relationship commonly understood by those skilled in the art. They are only used 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. In addition, the terms "first," "second," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0025] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0026] like Figures 1-3 As shown, a roller gripper paper positioning device includes a roller 6, an installation groove 8 on the roller 6, a gripper pad 1 installed on the inner side of the installation groove 8 near the paper 7 feeding end, a sliding groove 9 on the gripper pad 1, a liftable positioning pin 2 installed in the sliding groove 9, an elastic element 3 installed on the inner bottom wall of the sliding groove 9 and the bottom of the positioning pin 2, the upper part of the positioning pin 2 extending out of the top of the gripper pad 1, a rotatable roller gripper 4 installed in the installation groove 8, and a pressure plate 10 corresponding to the gripper pad 1 and the positioning pin 2 on the roller gripper 4.

[0027] The top of the dental pad 1 is provided with an inclined part 11, which forms a storage groove with the inner side wall of the mounting groove 8 to accommodate the pressure plate 10.

[0028] By setting the inclined part 11 and the inner side wall of the mounting groove 8 to form a storage groove, the pressure plate 10 on the roller gripper 4 can be stored. During the rotation of the roller 6, the upper surface of the roller gripper 4 and the positioning pin 2 is located in the mounting groove 8 and is lower than the surface of the roller 6, thereby preventing the roller gripper 4 from damaging the print head during the rotation of the roller 6, and meeting the usage requirements of subsequent enhancement processes.

[0029] A further technical solution is that the top of the positioning pin 2 is provided with a top plate 12 corresponding to the paper 7, and the bottom surface of the pressure plate 10 is provided with a groove 14 corresponding to the top plate 12. By setting the top plate 12 on the positioning pin 2, the incoming paper 7 can be effectively blocked, thereby facilitating the subsequent fixing of the paper head of the pressure plate 10 and improving the positioning accuracy of the paper 7.

[0030] The elastic element 3 is a helical spring. The upper part of the elastic element 3 is connected to the bottom wall of the positioning pin 2. The bottom of the slide groove 9 is equipped with a set screw 13. The lower part of the elastic element 3 is connected to the upper part of the set screw 13. By setting the elastic element 3 as a helical spring, the positioning pin 2 can be retracted into the slide groove 9 during the closing process of the roller gripper 4. After the paper 7 is processed, the roller gripper 4 is lifted up by the drive of the tooth shaft 5. At this time, the positioning pin 2 pushes out the paper head of the paper 7 under the elastic action of the elastic element 3, which facilitates the disassembly of the paper 7. The set screw 13 can adjust the elastic force of the helical spring by adjusting the depth of the set screw 13 in the slide groove 9 to meet the elastic pressure requirements between the positioning pin 2 and the roller gripper 4.

[0031] The mounting slot 8 is equipped with a rotatable toothed shaft 5, and the roller gripper 4 is mounted on the toothed shaft 5. One side of the toothed shaft 5 extends outside the mounting slot 8 and is connected to an external power source. The roller gripper 4 and the toothed shaft 5 are detachably connected. The rotation of the roller gripper 4 is controlled by connecting the toothed shaft 5 to an external power source. The detachable connection between the roller gripper 4 and the toothed shaft 5 facilitates the disassembly and replacement of the roller gripper 4.

[0032] The top of the pressure plate 10 is arc-shaped, and the tooth shaft 5 can drive the pressure plate 10 on the roller gripper 4 to rotate into the storage slot. By setting the top of the pressure plate 10 to be arc-shaped, it is easier for the pressure plate 10 to be stored in the storage slot, further avoiding collision between the roller gripper 4 and the external print head, and improving the safety of the equipment during operation.

[0033] Two sets of mounting slots 8 are provided on the roller 6. The two sets of mounting slots 8 are symmetrically arranged about the roller 6. By setting two sets of mounting slots 8, the position of the roller 6 can be easily adjusted, so that the paper 7 can easily find the mounting slots 8 for positioning during the feeding process, thus improving the convenience of operation.

[0034] The working process of this utility model is as follows: The paper 7 approaches the roller 6 under the action of the feeding device. At this time, the roller gripper 4 and the pressure plate 10 in the mounting groove 8 are in the open state. The positioning pin 2 extends out of the gripper pad 1 under the action of the elastic element 3. The paper 7 abuts against the top plate 12 on the positioning pin 2. Then, the tooth shaft 5 drives the roller gripper 4 to close under the action of the external power source. The pressure plate 10 on the roller gripper 4 presses down on the paper head and the positioning pin 2 on the paper 7 that abut against the top plate 12, so that the pressure plate 10 is stored in the receiving groove formed by the inclined part 11 and the inner side wall of the mounting groove 8. At this time, the positioning of the paper 7 is completed. After the printing process of the paper 7 is completed, the tooth shaft 5 drives the roller gripper 4 to reset. The positioning pin 2 resets under the action of the elastic element 3 and pushes out the paper head of the paper 7.

[0035] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A roll of dental paper positioning device comprising a roll (6) characterised in that: The roller (6) is provided with an installation groove (8). A gripper pad (1) is installed on the inner side of the installation groove (8) near the paper (7) feeding end. A sliding groove (9) is provided on the gripper pad (1). A lifting positioning pin (2) is installed in the sliding groove (9). An elastic element (3) is installed on the inner bottom wall of the sliding groove (9) and the bottom of the positioning pin (2). The upper part of the positioning pin (2) extends out of the top of the gripper pad (1). A rotatable roller gripper (4) is installed in the installation groove (8). A pressure plate (10) corresponding to the gripper pad (1) and the positioning pin (2) is provided on the roller gripper (4). The top of the dental pad (1) is provided with an inclined part (11), which forms a storage groove for accommodating the pressure plate (10) with the inner side wall of the mounting groove (8).

2. A roll of dental tissue positioning device as defined in claim 1, wherein: The top of the positioning pin (2) is provided with a top plate (12) corresponding to the paper (7), and the bottom surface of the pressure plate (10) is provided with a groove (14) corresponding to the top plate (12).

3. A roll of dental tissue positioning device as defined in claim 1, wherein: The elastic element (3) is a helical spring. The upper part of the elastic element (3) is connected to the bottom wall of the positioning pin (2). The bottom of the slide groove (9) is equipped with a set screw (13). The lower part of the elastic element (3) is connected to the upper part of the set screw (13).

4. A roll of dental tissue positioning device as defined in claim 1, wherein: A rotatable toothed shaft (5) is installed in the mounting groove (8). The roller gripper (4) is mounted on the toothed shaft (5). One side of the toothed shaft (5) extends out of the mounting groove (8) and is connected to an external power source. The roller gripper (4) and the toothed shaft (5) are detachably connected.

5. A roll of dental tissue positioning device as defined in claim 4, wherein: The top of the pressure plate (10) is arc-shaped, and the tooth shaft (5) can drive the pressure plate (10) on the roller tooth (4) to rotate into the storage groove.

6. The paper positioning device for roller grippers according to claim 1, characterized in that: The roller (6) is provided with two sets of mounting slots (8), which are symmetrically arranged about the roller (6).

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