Automatic tooth disengaging mechanism for screen frame of printing machine

Abstract

The utility model relates to the technical field of printing machines, and discloses a printing machine screen frame automatic tooth disengaging mechanism which comprises a first rack and a second rack which are used for being in meshing transmission with a gear transmission mechanism, the first rack is fixed to a screen frame, the second rack is slidably arranged at the end of the first rack in a sleeving mode, and a jacking telescopic piece is arranged between the first rack and the second rack. One end of the jacking telescopic piece acts on the first rack, the other end of the jacking telescopic piece acts on the second rack, and therefore the second rack is driven to slide on the first rack in the direction away from the gear transmission mechanism, and a reset elastic piece is arranged between the inner side of the first rack and the inner side of the second rack. The reset elastic piece is used for driving the second rack to slide in the direction close to the gear transmission mechanism, and a supporting sliding piece used for being in sliding fit with a sliding rail on the support is arranged on the side wall of the first rack. Compared with a complex driving mechanism and a transmission mechanism, the arrangement mode is simple in structure and not prone to being stuck, meanwhile, the production cost is reduced, and installation is convenient.

Description

Technical Field

[0001] The present application relates to the technical field of printing presses, and in particular to an automatic tooth-stripping mechanism for a screen frame of a printing press. Background Art

[0002] The screen printing machine usually has a rack mechanism on the frame, which drives the screen mechanism to reciprocate. At the same time, a scraper mechanism for scraping the material is provided on the frame. The scraper mechanism cooperates with the screen mechanism to scrape the slurry onto the paper on the receiving roller structure below, and the receiving roller structure is used to pull the paper horizontally.

[0003] If you want to inspect the crimping roller mechanism during production, or check whether there is a paper jam in the crimping roller mechanism, the traditional method is to remove the screen from the screen frame structure to prevent the slurry on the screen from blocking the crimping roller mechanism, so as to check the working status of the crimping roller mechanism. However, this method is more troublesome and requires the screen to be removed before installation, which affects production efficiency.

[0004] In order to solve this problem, a utility model patent with publication number CN215360424U discloses a screen pulling device for a printing machine, in which a rack mechanism is arranged on the screen frame, the rack mechanism consists of two rack sections, wherein the first rack is fixed to the screen frame, and the second rack is movably arranged on the first rack, the first rack and the second rack are meshed with the transmission gear transmission mechanism in sequence to realize the reciprocating motion of the screen frame; when the screen frame needs to be disengaged from the transmission gear transmission mechanism, the driving assembly is used to drive the sliding assembly to move, at this time, the spring between the second rack and the first rack is compressed, the second rack is disengaged from the gear transmission structure, the screen frame can be disengaged from the transmission gear transmission mechanism, and then the screen frame can be pulled to inspect the crimping roller mechanism.

[0005] However, it was found in the actual production process that the structure of the sliding component is relatively complex, the transmission process is cumbersome, and the sliding component is prone to getting stuck when the driving component drives the sliding component to move. Once the sliding component gets stuck, it will affect the normal operation of the equipment. Utility Model Content

[0006] In order to avoid the problem that the second rack is easily stuck when disengaging due to the excessive complexity of the sliding component structure, the present application provides an automatic disengaging mechanism for the screen frame of a printing machine.

[0007] The present application provides an automatic tooth-removing mechanism for a printing press screen frame, which adopts the following technical solution:

[0008] A printing press screen frame automatic gear disengagement mechanism comprises a first rack and a second rack for meshing and transmitting with a gear transmission mechanism, wherein the first rack is fixed to the screen frame, the second rack is slidably sleeved on the end of the first rack, a lifting and telescopic member is arranged between the first rack and the second rack, one end of the lifting and telescopic member acts on the first rack, and the other end acts on the second rack, thereby driving the second rack to slide on the first rack in a direction away from the gear transmission mechanism, a reset elastic member is arranged between the inner sides of the first rack and the second rack, the reset elastic member is used to drive the second rack to slide in a direction close to the gear transmission mechanism, and the side wall of the first rack is provided with a supporting sliding member for slidingly cooperating with a slide rail on a bracket.

[0009] By adopting the above technical scheme, the first rack and the second rack are both meshed and transmitted with the gear transmission mechanism, so as to realize the reciprocating motion of the screen frame; at the same time, the lifting telescopic member is used to drive the second rack to slide on the first rack in the direction away from the gear transmission mechanism, and the reset elastic member is used to drive the second rack to slide in the direction close to the gear transmission mechanism, so as to realize the switching between the disengaged state and the reset meshing state. Compared with the complex driving mechanism and transmission mechanism, this setting method has a relatively simple structure and is not easy to get stuck. At the same time, it reduces the production cost and facilitates installation.

[0010] Preferably, the lifting and telescopic member has a fixed end and a telescopic end, the fixed end of the lifting and telescopic member is fixed to the second rack, and the telescopic end of the lifting and telescopic member acts on the first rack.

[0011] By adopting the above technical solution, the fixed end of the lifting and telescopic member is installed on the second rack. When the lifting and telescopic member is extended, its telescopic end acts on the first rack, thereby pushing the second rack to slide.

[0012] Preferably, a limit mounting plate is provided on the side of the second rack away from the teeth, the fixed end of the lifting telescopic member is fixedly mounted on the limit mounting plate, and the telescopic end of the lifting telescopic member passes through the limit mounting plate and acts on the first rack.

[0013] By adopting the above technical solution, the limiting mounting plate facilitates the installation of the lifting and telescopic parts.

[0014] Preferably, the second rack is in a U-shaped structure, the opening of the second rack passes through the first rack, one side of the limiting mounting plate is fixed at the opening of the second rack, and the other side is connected to the lifting and telescopic member.

[0015] By adopting the above technical solution, the limiting mounting plate is not only used to install the lifting and telescopic member, but also can limit the sliding position of the second rack.

[0016] Preferably, a through hole is provided at a position of the first rack corresponding to the second rack, and a reset baffle is detachably installed at a position of the through hole corresponding to the side of the first rack away from the tooth teeth, and the reset elastic member is located in the through hole, and one end of the reset elastic member abuts against the reset baffle, and the other end abuts against the second rack.

[0017] By adopting the above technical solution, the through hole is provided to facilitate installation of the reset elastic member. At the same time, the reset baffle is used to block the reset elastic member, so that the reset elastic member can be easily replaced and repaired.

[0018] Preferably, a through hole is provided on the limit mounting plate, and the reset baffle is located in the through hole.

[0019] By adopting the above technical solution, the through hole is used to make way for the limit mounting plate, thereby preventing the reset baffle from interfering with the limit mounting plate during the sliding process.

[0020] Preferably, a guide roller is rotatably mounted on the side wall of the first rack, and an outer wall of the guide roller abuts against the side wall of the second rack.

[0021] By adopting the above technical solution, the guide roller acts on the side wall of the second rack, and the guide gear can guide the second rack during its sliding process.

[0022] Preferably, a guide column is installed on the side wall of the first rack located on the second rack, a guide hole is opened on the side wall of the second rack, and the guide column is located in the guide hole and slides in the guide hole.

[0023] By adopting the above technical solution, during the sliding process of the second rack, the second rack moves relative to the guide column, the guide column slides in the guide hole, and the sliding cooperation between the guide column and the guide hole guides and limits the sliding of the second rack.

[0024] In summary, the present application includes at least one of the following beneficial technical effects:

[0025] 1. The lifting and retracting member is used to drive the second rack to slide on the first rack in a direction away from the gear transmission mechanism, and the reset elastic member is used to drive the second rack to slide in a direction close to the gear transmission mechanism, so as to realize the switching between the disengaged state and the reset meshing state. Compared with the complex driving mechanism and transmission mechanism, this setting method has a simpler structure and is not easy to get stuck. At the same time, it reduces the production cost and is convenient for installation;

[0026] 2. A limit mounting plate is provided on the side of the second rack away from the teeth, and the limit mounting plate is convenient for installing the lifting and telescopic parts; at the same time, the second rack is provided as a U-shaped structure to facilitate its sliding on the first rack. The limit mounting plate is not only used to install the lifting and telescopic parts, but also can limit the sliding position of the second rack.

[0027] 3. The guide roller acts on the side wall of the second rack, and the guide gear can guide the second rack during its sliding process; the sliding cooperation between the guide column and the guide hole guides and limits the sliding of the second rack. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the present application;

[0029] Figure 2 is a schematic diagram of the partial structure when the second rack is in a reset meshing state in the embodiment of the present application;

[0030] Figure 3 is a schematic diagram of a partial structure when the second rack is in a tooth-disengaged state in an embodiment of the present application;

[0031] Figure 4 It is a partial explosion schematic diagram of an embodiment of the present application.

[0032] Figure numerals: 1. first rack; 11. smooth section; 2. second rack; 3. supporting sliding member; 4. lifting and telescopic member; 5. limiting mounting plate; 6. reset elastic member; 7. through hole; 8. reset baffle; 9. guide roller; 10. guide column; 12. guide hole. DETAILED DESCRIPTION

[0033] The following is combined with Figure 1 -Attached Figure 4 This application is described in further detail.

[0034] The embodiment of the present application discloses an automatic tooth-stripping mechanism for a screen frame of a printing machine.

[0035] Reference Figure 1 , an automatic de-toothing mechanism for a screen frame of a printing machine, comprising a first rack 1, a second rack 2 and a supporting slide 3. The first rack 1 can be fixed to the screen frame and meshed with a gear transmission mechanism to drive the screen frame to reciprocate. The first rack 1 can also be directly used as a part of the screen frame to form a screen structure together with other metal plates; the second rack 2 is located at the end of the first rack 1, and the second rack 2 can slide on the first rack 1 toward or away from the gear transmission mechanism to achieve switching between de-toothing and resetting the meshing state. At the same time, the supporting slide 3 is fixed to the first rack 1, and the supporting slide 3 is used to slide in cooperation with the slide rail on the frame.

[0036] Reference Figure 2 When the second rack 2 slides toward the direction close to the gear transmission mechanism and reaches the final position in this direction, the teeth of the second rack 2 and the teeth on the first rack 1 are located on the same plane, and both can mesh normally with the gear transmission mechanism. This is the normal working state of the screen frame;

[0037] Reference Figure 3 When the second rack 2 slides in the direction away from the gear transmission mechanism and reaches the final position in this direction, the tooth top of the second rack 2 should at least pass over the tooth root of the first rack 1 to ensure that when the gear transmission mechanism has completed the engagement with the first rack 1 and enters the engagement area of ​​the second rack 2, the gear transmission mechanism cannot engage with the teeth of the second rack 2; when the gear transmission mechanism moves to this position, it reaches a disengaged state, in which the screen frame only relies on the support sliding member 3 and the slide rail on the frame for support. At this time, the screen frame can be pulled out of the position where the receiving roller mechanism is located to expose it for easy maintenance.

[0038] Reference Figure 4 In this embodiment, the area where the first rack 1 is located on the second rack 2 is set as a smooth section 11, the smooth section 11 is not provided with teeth, and the smooth section 11 is located at the end of the first rack 1, the second rack 2 is a U-shaped structure, and the opening of the second rack 2 is sleeved on the smooth section 11 of the first rack 1.

[0039] When the receiving roller mechanism needs to be inspected, first slide the second rack 2 in the direction away from the gear transmission mechanism, and then the gear transmission mechanism first engages with the tooth part on the first rack 1, and then enters the meshing area of ​​the second rack 2. Since the gear transmission mechanism cannot engage with the second rack 2, the support sliding member 3 can be directly used to cooperate with the slide rail on the frame to pull out the screen frame.

[0040] In order to automatically bring the second rack 2 to a disengaged state, a lifting telescopic member 4 is further provided on the first rack 1, and the lifting telescopic member 4 acts on the first rack 1 and the second rack 2 respectively. When the lifting telescopic member 4 is extended, the second rack 2 can be driven to move in a direction away from the gear transmission mechanism to reach a disengaged state. In the present embodiment, the lifting telescopic member 4 has a fixed end and a telescopic end, and the fixed end of the lifting telescopic member 4 can be mounted on the second rack 2, and the telescopic end of the lifting telescopic member 4 acts on the first rack 1 to push the second rack 2 to slide. In other embodiments, the fixed end of the lifting telescopic member 4 can also be mounted on the first rack 1, and its telescopic end acts on the second rack 2, which can also push the second rack 2 to slide.

[0041] Specifically, the lifting telescopic member 4 uses a cylinder. In this embodiment, the cylinder body is fixed to the second rack 2, and the piston rod of the cylinder faces the smooth section 11 of the first rack 1. When the cylinder is extended, the piston rod of the cylinder acts on the smooth section 11 of the first rack 1, so that the cylinder body pulls the second rack 2 to move in a direction away from the gear transmission mechanism. In other embodiments, the cylinder body can also be fixed to the first rack 1, and its piston rod acts on the second rack 2, which can also achieve the effect of pushing the second rack 2 to slide.

[0042] Furthermore, in order to facilitate the installation of the lifting and telescopic part 4, a limiting mounting plate 5 is provided on the side of the second rack 2 away from the tooth teeth. The limiting mounting plate 5 is arranged parallel to the second rack 2. The smooth section 11 of the first rack 1 is limited by the limiting mounting plate 5 in the opening of the second rack 2, so that the second rack 2 cannot be detached from the first rack 1.

[0043] When the second rack 2 slides in a direction close to the gear transmission mechanism and slides to the final position in this direction, the smooth section 11 of the first rack 1 abuts against the side wall of the limiting mounting plate 5; when the second rack 2 slides in a direction away from the gear transmission mechanism and slides to the final position in this direction, the smooth section 11 of the first rack 1 abuts against the bottom of the opening of the second rack 2.

[0044] In this embodiment, the two ends of the limit mounting plate 5 extend from the two ends of the second rack 2 respectively, and the two ends and the middle position of the limit mounting plate 5 are separately installed with lifting telescopic parts 4, which are installed on the side of the limit mounting plate 5 away from the second rack 2, and the telescopic end of the lifting telescopic part 4 can pass through the limit mounting plate 5. When the second rack 2 is lifted, the telescopic end of the lifting telescopic part 4 passes through the limit mounting plate 5 and abuts against the side wall of the smooth section 11 of the first rack 1, so that the second rack 2 can move in the direction away from the gear transmission mechanism.

[0045] Specifically, when a cylinder is used as the lifting telescopic member 4 , the cylinder body of the cylinder is installed on the side of the limiting mounting plate 5 away from the second rack 2 , and the piston rod thereof passes through the limiting mounting plate 5 .

[0046] In order to achieve the reset meshing state of the second rack 2, a reset elastic member 6 is further provided between the first rack 1 and the second rack 2. One end of the reset elastic member 6 acts on the first rack 1, and the other end acts on the inner wall of the opening of the second rack 2, so as to push the second rack 2 to move toward the direction close to the gear transmission mechanism so as to mesh with the gear transmission mechanism. In this embodiment, the reset elastic member 6 is a spring.

[0047] Specifically, the specific installation structure of the reset elastic member 6 is: a through hole 7 is opened in the part of the first rack 1 located at the smooth section 11, and a reset baffle 8 is provided at the position of the through hole 7 on the side of the first rack 1 away from the tooth, and the reset elastic member 6 is located in the through hole 7, and one end of the reset elastic member 6 abuts against the reset baffle 8, and the other end abuts against the inner wall of the opening of the second rack 2.

[0048] When the screen frame needs to be switched to the disengaged state, the lifting telescopic rod is used to drive the second rack 2 to move in the direction away from the gear transmission mechanism. At this time, the reset elastic member 6 is compressed and stores energy; when the screen frame needs to be switched from the disengaged state to the reset engaged state, the lifting telescopic rod is retracted. At this time, the reset elastic member 6 releases elastic potential energy, thereby pushing the second rack 2 to reset until the teeth on the second rack 2 and the teeth on the first rack 1 are located on the same plane, and in this state, when the gear transmission mechanism is engaged with the second rack 2, the reset elastic member 6 can use its elastic force to keep the second rack 2 in a fixed or nearly fixed relative position relationship with respect to the first rack 1, so that the gear transmission mechanism and the second rack 2 can maintain normal engagement.

[0049] Furthermore, the reset baffle 8 is detachably mounted on the first rack 1 by bolts. In order to prevent the reset baffle 8 from interfering with the limit mounting plate 5 when it slides with the second rack 2, the limit mounting plate 5 is provided with a through hole along its sliding direction, and the reset baffle 8 is located in the through hole. When the lifting telescopic member 4 drives the second rack 2 to move, the limit mounting plate 5 moves synchronously with the second rack 2, and at this time, the reset baffle 8 slides relatively in the through hole of the limit mounting plate 5.

[0050] Furthermore, in order to improve the stability of the second rack 2 during sliding, a guide roller 9 is rotatably mounted on the side wall of the first rack 1, and the outer wall of the guide roller 9 abuts against the side wall of the second rack 2. During the sliding process of the second rack 2, the guide roller 9 rotates driven by the second rack 2. Preferably, the guide rollers 9 are arranged on both sides of the second rack 2, respectively abutting against the two side walls of the second rack 2, and the number of rollers on each side is two.

[0051] At the same time, a guide post 10 is installed on the side wall of the first rack 1 located at the smooth section 11, and a guide hole 12 is opened on the side wall of the second rack 2. The guide post 10 is located in the guide hole 12 and slides in the guide hole 12. The guide post 10 can be screwed on the side wall of the first rack 1 by means of a thread. In this embodiment, the guide hole 12 is a waist-shaped hole, and the guide holes 12 are distributed on the two opposite side walls of the second rack 2, and there are two guide holes 12 on each side. During the sliding process of the second rack 2, the second rack 2 moves relative to the guide post 10, and the guide post 10 slides in the guide hole 12.

[0052] The implementation principle of the embodiment of the present application is:

[0053] When the screen frame is in normal working state, the teeth of the second rack 2 and the teeth of the first rack 1 are located on the same plane, and the two form a complete meshing surface, and mesh with the gear transmission mechanism in turn, and the gear transmission mechanism drives the screen frame to reciprocate. At the same time, the screen frame cooperates with the scraper mechanism to scrape the slurry on the screen frame onto the paper above the receiving roller mechanism to achieve printing;

[0054] When the receiving roller mechanism needs to be repaired, the lifting telescopic member 4 is used to drive the second rack 2 to move in the direction away from the gear transmission mechanism. At the same time, the reset elastic member 6 is compressed and stores energy, and the second rack 2 moves until its tooth tip passes over the tooth root of the first rack 1. Then, the gear transmission mechanism first meshes with the first rack 1 and then enters the meshing area of ​​the second rack 2. At this time, the screen frame is disengaged, and the screen frame only relies on the support sliding member 3 and the slide rail on the frame for support. At this time, the screen frame can be pulled out of the position where the receiving roller mechanism is located to expose it for easy maintenance.

[0055] After the inspection is completed, the second rack 2 needs to be reset and the lifting telescopic part 4 is retracted. At this time, the reset elastic part 6 releases the elastic potential energy to push the second rack 2 to reset until the teeth on the second rack 2 are on the same plane as the teeth on the first rack 1, and in this state, when the gear transmission mechanism is engaged with the second rack 2, the reset elastic part 6 can use its elastic force to keep the second rack 2 in a fixed or nearly fixed relative position relationship with respect to the first rack 1, so that the gear transmission mechanism and the second rack 2 can maintain normal engagement.

[0056] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. An automatic tooth-stripping mechanism for a screen frame of a printing press, characterized in that: The invention comprises a first rack (1) and a second rack (2) for meshing with a gear transmission mechanism, wherein the first rack (1) is fixed to a screen frame, and the second rack (2) is slidably sleeved on the end of the first rack (1). A lifting telescopic member (4) is provided between the first rack (1) and the second rack (2), and one end of the lifting telescopic member (4) acts on the first rack (1) and the other end acts on the second rack (2), thereby driving the second rack (2) to slide on the first rack (1) in a direction away from the gear transmission mechanism. A reset elastic member (6) is provided between the inner sides of the first rack (1) and the second rack (2), and the reset elastic member (6) is used to drive the second rack (2) to slide in a direction close to the gear transmission mechanism. The side wall of the first rack (1) is provided with a supporting sliding member (3) for slidingly cooperating with a slide rail on a bracket.

2. The automatic tooth-stripping mechanism for a screen frame of a printing press according to claim 1, characterized in that: The lifting and telescopic member (4) has a fixed end and a telescopic end, the fixed end of the lifting and telescopic member (4) is fixed to the second rack (2), and the telescopic end of the lifting and telescopic member (4) acts on the first rack (1).

3. The automatic teeth-removing mechanism for a screen frame of a printing press according to claim 1, characterized in that: A limit mounting plate (5) is provided on the side of the second rack (2) facing away from the teeth, the fixed end of the lifting telescopic member (4) is fixedly mounted on the limit mounting plate (5), and the telescopic end of the lifting telescopic member (4) passes through the limit mounting plate (5) and acts on the first rack (1).

4. The automatic teeth-removing mechanism for a screen frame of a printing press according to claim 3, characterized in that: The second rack (2) is of a U-shaped structure, the opening of the second rack (2) passes through the first rack (1), one side of the position-limiting mounting plate (5) is fixed at the opening of the second rack (2), and the other side is connected to the lifting and telescopic member (4).

5. The automatic teeth-removing mechanism for a screen frame of a printing press according to claim 3, characterized in that: A through hole (7) is provided at a position of the first rack (1) corresponding to the second rack (2); a reset baffle (8) is detachably mounted at a position of the through hole (7) on a side of the first rack (1) away from the tooth teeth; the reset elastic member (6) is located in the through hole (7); one end of the reset elastic member (6) abuts against the reset baffle (8), and the other end abuts against the second rack (2).

6. The automatic teeth-removing mechanism for a screen frame of a printing press according to claim 5, characterized in that: A through hole is provided on the position limiting mounting plate (5), and the reset baffle (8) is located in the through hole.

7. The automatic teeth-removing mechanism for a screen frame of a printing press according to claim 1, characterized in that: A guide roller (9) is rotatably mounted on the side wall of the first rack (1), and the outer wall of the guide roller (9) abuts against the side wall of the second rack (2).

8. The automatic teeth-removing mechanism for a screen frame of a printing press according to claim 1, characterized in that: The first rack (1) is located on a side wall of the second rack (2) and is provided with a guide column (10); the side wall of the second rack (2) is provided with a guide hole (12); the guide column (10) is located in the guide hole (12) and slides in the guide hole (12).

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