Printing machine with rollers convenient to replace

Abstract

The utility model relates to a printing machine with rollers convenient to replace, and belongs to the technical field of printing machines, the printing machine with the rollers convenient to replace comprises a printing machine body, a roller frame is arranged at the front end of an outlet of the printing machine body, a discharging roller for winding unprinted flex banner is arranged in the roller frame, and limiting assemblies are arranged on the two sides of the roller frame; the opposite sides of the two limiting assemblies are provided with butt-inserting pieces which are inserted into the discharging roller and used for achieving installation of the discharging roller. According to the printing machine facilitating roller replacement, when a discharging roller is replaced, a limiting rod only needs to be pulled upwards till the bottom end of the limiting rod is higher than a circular block, then the circular block is stretched outwards till a limiting groove in the circular block is aligned with the limiting rod, and after the limiting rod is loosened, the limiting rod is automatically clamped into the corresponding limiting groove under the resilience acting force of a first telescopic spring; after the other end of the discharging roller is repeatedly operated, the discharging roller can be detached, operation is easy, and rapid replacement is convenient.

Description

Technical Field

[0001] This application relates to the field of printing press technology, specifically to a printing press that facilitates roller changing. Background Technology

[0002] Printed fabric, commonly known as lightbox fabric, is a printing material made from PVC through a specific manufacturing process. It is mainly used for outdoor advertising printing.

[0003] Existing inkjet fabric can be printed using an inkjet printing press, which requires a feed roller and a take-up roller. The feed roller and take-up roller are axially fixed to a roller shaft. Usually, there is an insertion hole on the printing press housing that matches the roller shaft. The feed roller winds the fabric, causing the roller shaft to rotate and be mounted on the printing press, feeding the fabric into the printing press for printing. The take-up roller, located at the outlet, tightens and collects the fabric.

[0004] However, replacing the feed roller and take-up roller is quite troublesome, which affects efficiency.

[0005] Therefore, a clamping structure for a printing press is proposed in Chinese patent CN211444388U. In this patent, the turntable is clamped and fixed by operating the first clamping member and the second clamping member, which can quickly and stably fix the feed roller or take-up roller. Disassembly is also convenient, which helps to improve work efficiency.

[0006] In the aforementioned patent, although the feed roller is fixed by clamping the fixed turntable with the first clamping member and the second clamping member, the locking column 132 needs to rotate multiple times to achieve locking. Therefore, after research, the inventors proposed another optimized and improved solution, which further simplifies the installation of the feed roller. Thus, this application proposes a printing machine that facilitates roller replacement. Utility Model Content

[0007] To address the shortcomings of existing technologies, this application provides a printing press with convenient roller changing capabilities, featuring advantages such as quick replacement of the feed roller.

[0008] To achieve the above objectives, this application provides the following technical solution: a printing machine that facilitates roller replacement, comprising a printing machine body, a roller frame at the front end of the printing machine body, a feed roller inside the roller frame that winds up unprinted inkjet cloth, and limiting components on both sides of the roller frame, with a matching plug inserted into the feed roller on the opposite side of the two limiting components to realize the installation of the feed roller;

[0009] The limiting assembly includes a housing fixed to the outside of the roller frame, several second telescopic springs with one end welded to the inner wall of the housing, an annular plate welded to the other end of all the second telescopic springs, a pull rod that runs transversely through the housing, the annular plate and one side wall of the roller frame and is welded to the insert, and a circular block welded to the other end of the pull rod.

[0010] The feed roller is installed inside the roller frame using a limiting assembly and a matching plug. The roller frame can be quickly replaced simply by applying a lateral outward pulling force to the pull rod inside the limiting assembly.

[0011] Furthermore, the insert includes a limiting plate welded to one end of the pull rod located inside the roller frame and a limiting post fixed to the side of the limiting plate away from the pull rod and extending into the inside of the feed roller.

[0012] The limiting post is inserted into the feeding roller to support the feeding roller, and the limiting plate at both ends of the feeding roller can be used to block the feeding roller from swaying left and right during the movement.

[0013] Furthermore, the pull rod is located at the axis of the outer casing, and several second telescopic springs are distributed around the pull rod. The inner wall of the outer casing is welded with a number of slide rods equal to the number of second telescopic springs and welded together with the outer wall of the roller frame. The slide rods are located inside the second telescopic springs.

[0014] The even distribution of the second telescopic springs ensures uniform force on the annular plate, resulting in smoother and more stable reciprocating motion. In addition, the slide rod, being inside the second telescopic spring, provides internal support, reducing bending and twisting in the middle of the spring and extending its service life.

[0015] Furthermore, the pull rod is slidably connected to the outer shell but fixedly connected to the annular plate, and the annular plate is simultaneously slidably connected to the inner wall of the outer shell and the slide rod.

[0016] To further explain the tie rod and the ring plate, and to avoid any conflict in principle during the manufacturing process, when a lateral outward pulling force is applied to the tie rod, the tie rod will move synchronously with the ring plate, thereby generating pressure on the second telescopic spring. When the pressure is removed, the second telescopic spring can automatically help the ring plate and the tie rod return to their original positions.

[0017] Furthermore, the surface of the circular block is uniformly provided with several limiting grooves.

[0018] By setting a limiting groove, it is convenient to lock the position of the circular block later.

[0019] Furthermore, the surface of the outer casing is provided with a locking device that works in conjunction with the limiting groove to lock the pull rod.

[0020] Based on the description of the limiting groove, inserting the clip into one of the limiting grooves can lock the positions of the annular plate, the tie rod, and the circular block, thus facilitating the replacement of the feeding roller by the operator.

[0021] Furthermore, the fastener includes an L-shaped plate welded to the surface of the outer shell, a first telescopic spring with one end fixed to the top of the L-shaped plate, and a limiting rod fixed to the top of the first telescopic spring and moving vertically through the first telescopic spring and the L-shaped plate, the limiting rod being adapted to the limiting groove.

[0022] The specific structure of the locking mechanism is as follows: When someone pulls the limiting rod upwards until the bottom of the limiting rod is higher than the circular block, the circular block is then stretched outwards until the limiting groove on the circular block aligns with the limiting rod. After the limiting rod is released, the limiting rod automatically engages with the corresponding limiting groove under the rebound force of the first telescopic spring, thus completing the locking of the annular plate, the pull rod, and the circular block.

[0023] Furthermore, the roller frame is an inverted "U" shaped frame, with receiving grooves opened on the inner walls of both sides of the roller frame. The receiving grooves coincide with the axis of the limiting plate, and the diameter and depth of the receiving grooves are greater than the diameter and thickness of the limiting plate, respectively.

[0024] A receiving slot is reserved to provide space for the movement of the limiting plate, so that after the ring plate, tie rod, and circular block are locked, the limiting plate can also be retracted into the receiving slot.

[0025] Compared with the prior art, the technical solution of this application has the following beneficial effects:

[0026] This convenient roller-changing printing machine allows for easy replacement of the feed roller. Simply pull the limit rod upwards until its bottom is above the circular block, then stretch the circular block outwards until the limiting groove on the block aligns with the limit rod. After releasing the limit rod, it automatically engages with the corresponding limiting groove under the return force of the first telescopic spring. Repeat this process on the other end of the feed roller to remove it. Then, align both ends of the feed roller with the limiting posts, pull the limit rod upwards again to disengage it from the limiting groove, and the limiting post automatically inserts into the feed roller under the return force of the second telescopic spring, thus completing the installation. The operation is simple and allows for quick and easy replacement. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the structure of this application;

[0028] Figure 2 This is a cross-sectional view of the roller frame structure of this application;

[0029] Figure 3 This is an enlarged view of the limiting component of the structure in this application;

[0030] Figure 4 This is a perspective view of the limiting component of the structure in this application.

[0031] In the diagram: 1. Printing machine body; 2. Roller frame; 3. Feeding roller; 4. Limiting assembly; 41. Outer shell; 42. Slide rod; 43. Annular plate; 44. Pull rod; 45. Circular block; 46. Limiting groove; 47. Second telescopic spring; 5. L-shaped plate; 6. First telescopic spring; 7. Limiting rod; 8. Limiting plate; 9. Limiting post; 10. Receiving groove. Detailed Implementation

[0032] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0033] Please see Figure 1 A printing machine with convenient roller changing includes a printing machine body 1, a roller frame 2 at the front end of the outlet of the printing machine body 1, and a feed roller 3 with unprinted inkjet cloth wound up inside the roller frame 2.

[0034] Please see Figure 2 Limiting components 4 are provided on both sides of the roller frame 2. On the opposite side of the two limiting components 4, there are plug-in inserts that are inserted into the feed roller 3 to realize the installation of the feed roller 3.

[0035] The feeding roller 3 can be installed using the limiting component 4 and the plug-in.

[0036] Please see Figure 3-4 The limiting component 4 includes a housing 41 fixed to the outside of the roller frame 2, a plurality of second telescopic springs 47 with one end welded to the inner side wall of the housing 41, an annular plate 43 welded to the other end of all the second telescopic springs 47, a pull rod 44 that transversely penetrates the housing 41, the annular plate 43 and one side wall of the roller frame 2 and is welded to the plug, and a circular block 45 welded to the other end of the pull rod 44.

[0037] The feeding roller 3 is installed inside the roller frame 2 using the limiting component 4 and the insert, and the roller frame 2 can be quickly replaced simply by applying a lateral outward pulling force to the pull rod 44 inside the limiting component 4.

[0038] One point to note is that the pull rod 44 is located at the axis of the housing 41, and several second telescopic springs 47 are distributed around the pull rod 44. The inner wall of the housing 41 is welded with a number of slide rods 42 equal to the number of second telescopic springs 47 and welded to the outer wall of the roller frame 2. The slide rods 42 are located inside the second telescopic springs 47.

[0039] The even distribution of the second telescopic springs 47 ensures that the annular plate 43 is subjected to uniform force, thereby making the reciprocating motion of the annular plate 43 smoother and more stable. In addition, since the slide rod 42 is inside the second telescopic spring 47, it can play an internal support role for the second telescopic spring 47, reducing the occurrence of bending and twisting in the middle of the second telescopic spring 47, and improving the service life of the second telescopic spring 47.

[0040] Here, we need to provide supplementary explanations regarding the pull rod 44 and the annular plate 43 to avoid any conflict in principle during the manufacturing process: the pull rod 44 is slidably connected to the outer shell 41 but fixedly connected to the annular plate 43, while the annular plate 43 is slidably connected to the inner wall of the outer shell 41 and the slide rod 42.

[0041] When a lateral outward pulling force is applied to the pull rod 44, the pull rod 44 will move synchronously with the annular plate 43, thereby generating pressure on the second telescopic spring 47. When the pressure is removed, the second telescopic spring 47 can automatically help the annular plate 43 and the pull rod 44 to return to their original positions.

[0042] Several limiting grooves 46 are evenly distributed on the surface of the circular block 45. The limiting grooves 46 facilitate the later locking of the position of the circular block 45.

[0043] The surface of the outer casing 41 is provided with a locking device that works with the limiting groove 46 to lock the pull rod 44. By inserting the locking device into one of the limiting grooves 46, the positions of the annular plate 43, the pull rod 44, and the circular block 45 can be locked, thereby facilitating the replacement of the feeding roller 3 by the operator.

[0044] Please see Figure 3 The fastener includes an L-shaped plate 5 welded to the surface of the outer shell 41, a first telescopic spring 6 with one end fixed to the top of the L-shaped plate 5, and a limiting rod 7 fixed to the top of the first telescopic spring 6 and moving vertically through the first telescopic spring 6 and the L-shaped plate 5. The limiting rod 7 is adapted to the limiting groove 46.

[0045] It is worth mentioning that the limiting rod 7 is a T-shaped rod. When the first telescopic spring 6 is relaxed, the bottom of the limiting rod 7 is lower than the highest point of the circular block 45.

[0046] When someone pulls the limiting rod 7 upwards until the bottom of the limiting rod 7 is higher than the circular block 45, the circular block 45 is stretched outwards until the limiting groove 46 on the circular block 45 is aligned with the limiting rod 7. After the limiting rod 7 is released, the limiting rod 7 is automatically locked into the corresponding limiting groove 46 under the rebound force of the first telescopic spring 6, thus completing the locking of the annular plate 43, the pull rod 44, and the circular block 45.

[0047] Please see Figure 2, the pair of plugins includes a limit plate 8 welded to one end of the pull rod 44 inside the roller frame 2 and a limit post 9 fixed to the side of the limit plate 8 away from the pull rod 44 and extending into the inside of the unwinding roller 3.

[0048] The limit post 9 is inserted into the inside of the unwinding roller 3 to support the unwinding roller 3. At the same time, the two ends of the unwinding roller 3 are blocked by the limit plate 8, which can prevent the unwinding roller 3 from swaying left and right during movement.

[0049] It should be noted here that the diameter of the limit post 9 should be as close as possible to the inner diameter of the unwinding roller 3 to ensure a stable rotation of the unwinding roller 3. The diameter of the limit plate 8 is larger than the inner diameter of the unwinding roller 3 to ensure the restriction of the unwinding roller 3.

[0050] Finally, it should be said that the roller frame 2 is an inverted "C" - shaped frame. Accommodating grooves 10 are provided on the inner walls of both sides of the roller frame 2. The accommodating grooves 10 coincide with the axis of the limit plate 8. The diameter and depth of the accommodating grooves 10 are respectively larger than the diameter and thickness of the limit plate 8.

[0051] A space for the limit plate 8 to move is reserved in the accommodating groove 10, which is convenient for the limit plate 8 to be retracted into the accommodating groove 10 after the annular plate 43, the pair of pull rods 44, and the circular block 45 are locked.

[0052] The working principle of the above - mentioned embodiment is as follows: When the unwinding roller 3 needs to be replaced, the limit rod 7 is pulled upward until the bottom end of the limit rod 7 is higher than the circular block 45. Then, the circular block 45 is pulled outwards until the limit groove 46 on the circular block 45 is aligned with the limit rod 7. After that, the limit rod 7 is released. Under the action of the rebound force of the first telescopic spring 6, the limit rod 7 automatically snaps into the corresponding limit groove 46. After repeating the operation at the other end of the unwinding roller 3, the unwinding roller 3 can be disassembled. Then, the two ends of the unwinding roller 3 are aligned with the limit posts 9, and the limit rod 7 is pulled upward again. After the limit rod 7 is disengaged from the limit groove 46, under the restoration of the second telescopic spring 47, the limit posts 9 can automatically insert into the unwinding roller 3, and then the replacement operation is completed.

Claims

1. A printing press with convenient roller changing, comprising a printing press body (1), wherein a roller frame (2) is provided at the front end of the outlet of the printing press body (1), and a feed roller (3) containing unprinted inkjet fabric is provided inside the roller frame (2), characterized in that: On both sides of the roller frame (2), limit components (4) are provided. On the opposite sides of the two limit components (4), there are plug-in parts inserted into the inside of the material feeding roller (3) for installing the material feeding roller (3). The limit component (4) includes a housing (41) fixed on the outer side of the roller frame (2), several second telescopic springs (47) welded at one end to the inner side wall of the housing (41), an annular plate (43) welded to the other ends of all the second telescopic springs (47), a pull rod (44) horizontally penetrating the housing (41), the annular plate (43) and one side wall of the roller frame (2) and welded to the plug-in part, and a circular block (45) welded to the other end of the pull rod (44).

2. The printing press with convenient roller changing according to claim 1, characterized in that: The plug-in part includes a limit plate (8) welded to one end of the pull rod (44) inside the roller frame (2), and a limit column (9) fixed on the side of the limit plate (8) away from the pull rod (44) and extending into the inside of the material feeding roller (3).

3. A printing press with convenient roller changing according to claim 1, characterized in that: The pull rod (44) is located at the axis of the housing (41). Several of the second telescopic springs (47) are distributed around the pull rod (44). On the inner wall of the housing (41), there are sliding rods (42) welded with the same number as the second telescopic springs (47) and welded to the outer side wall of the roller frame (2). The sliding rods (42) are located inside the second telescopic springs (47).

4. A printing press with convenient roller changing according to claim 3, characterized in that: The pull rod (44) is slidably connected to the housing (41) but fixedly connected to the annular plate (43). The annular plate (43) is simultaneously slidably connected to the inner wall of the housing (41) and the sliding rod (42).

5. A printing press with convenient roller changing according to claim 1, characterized in that: A number of limit grooves (46) are evenly formed on the surface of the circular block (45).

6. A printing press with convenient roller changing according to claim 5, characterized in that: On the surface of the housing (41), there is a clamping part used in cooperation with the limit groove (46) to lock the pull rod (44).

7. A printing press with convenient roller changing according to claim 6, characterized in that: The clamping part includes an L-shaped plate (5) welded to the surface of the housing (41), a first telescopic spring (6) fixed at one end to the top of the L-shaped plate (5), and a limit rod (7) fixed to the top of the first telescopic spring (6) and vertically passing through the first telescopic spring (6) and the L-shaped plate (5) movably. The limit rod (7) is adapted to the limit groove (46).

8. A printing press with convenient roller changing according to claim 2, characterized in that: The roller frame (2) is an inverted "C" - shaped frame. Accommodating grooves (10) are formed on the inner walls on both sides of the roller frame (2). The axes of the accommodating grooves (10) coincide with the axis of the limit plate (8). The diameter and depth of the accommodating groove (10) are respectively larger than the diameter and thickness of the limit plate (8).

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