Pressing device for paper placing shaft

Abstract

The utility model discloses a paper placing shaft pressing device which comprises two base side plates, a paper placing pipe is jointly installed at the upper ends of the two base side plates, and paper placing gears are installed on the left portion and the right portion of the outer surface of the paper placing pipe. First gear fixing plates are installed at the ends, opposite to each other, of the two base side plates, second gear fixing plates are installed at the ends, opposite to each other, of the two first gear fixing plates, and closing covers are hinged between the left inner walls and the right inner walls of the two first gear fixing plates. According to the pressing device for the paper placing shaft, it is guaranteed that the external thread bearing is tightly attached to the paper placing pipe through transmission of the connecting rod, use is easy, operation is convenient and fast, after the closing cover is closed, all gears of a transmission part are covered with the closing cover, therefore, the gears are prevented from being exposed, accidental injuries caused by the fact that an operator touches the gears by mistake when the device works are avoided, and the working efficiency is improved. And the safety of the device is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of digital printing equipment, in particular to a paper feeding shaft pressing device. Background Technique

[0002] Digital printing equipment is a device that breaks through the technical bottleneck of digital printing technology, realizes true one-piece printing, eliminates the need for plate making, and completes full-color images at one time. It is a replacement product of traditional printing machines. In digital printing equipment, the paper feeding system is a very important component in the printer. Its main function is to ensure that the printing medium remains stable during transmission without problems such as deviation or paper jamming, which is one of the main reasons affecting printing accuracy. The paper feeding system of a roll material is generally divided into damped paper feeding and tension paper feeding. This paper feeding method with a single shaft passing through the printing medium is a type of tension paper feeding. In a single-shaft paper feeding system, in order to prevent the position of the shaft from deviating during paper feeding and affecting printing accuracy, it is necessary to limit the position of the paper feeding rod.

[0003] There are various types of limiting methods in the existing industry, mostly using the pin type, with relatively high processing costs and single functions. At the same time, in order to ensure safety, an additional protection device needs to be made for the paper feeding transmission part to prevent accidental injury to operators during operation, which is rather troublesome and inconvenient. Content of the Utility Model

[0004] The main purpose of the utility model is to provide a paper feeding shaft pressing device, which can effectively solve the problems in the background technique.

[0005] To achieve the above purpose, the technical solution adopted by the utility model is as follows:

[0006] A paper feeding shaft pressing device includes base side plates. There are two base side plates. A paper feeding tube is jointly installed at the upper ends of the two base side plates. Paper feeding gears are installed on the left outer surface and the right outer surface of the paper feeding tube. One-way gear fixing plates are installed at the opposite ends of the two base side plates. Second gear fixing plates are installed at the opposite ends of the two one-way gear fixing plates. Covers are hinged between the left inner walls and the right inner walls of the two one-way gear fixing plates.

[0007] Preferably, two externally threaded bearings are installed on the upper part of the left end of the base side plate. A rotating shaft is jointly installed between the left inner wall and the right inner wall of the closing cover. A first connecting rod is installed on the outer surface of the rotating shaft. The front part of the left end of the first connecting rod is hingedly installed with a second connecting rod. The front part of the right end of the second connecting rod is hingedly installed with a third connecting rod. A paper feeding turret shaft is jointly installed at the corresponding ends of the first gear fixing plate and the second gear fixing plate. A flange bearing, a first turret gear, a second turret gear, and a gear spacer are respectively installed on the outer surface of the paper feeding turret shaft. A stepping motor is fixedly installed at the left end of the second gear fixing plate. A motor gear is fixedly installed at the output end of the stepping motor. Flap pieces are installed at both the left end and the right end of the paper feeding gear. A gear coupling ring is installed on the outer surface of the paper feeding tube. When the closing cover is closed, it will drive the first connecting rod on the rotating shaft. The first connecting rod will drive the second connecting rod, and the second connecting rod will drive the third connecting rod to tightly hook the paper feeding tube. Through the connecting rod transmission, it is ensured that the externally threaded bearing is tightly attached to the paper feeding tube. It is not only simple to use and convenient to operate, but also after the closing cover is closed, all the gears of the transmission part are covered by the closing cover, thus preventing the gears from being exposed and avoiding accidental injuries caused by the operator accidentally touching the gears during the operation of the device, thereby improving the safety of the device.

[0008] Preferably, the motor gear is meshed and connected with the second turret gear, and the first turret gear is meshed and connected with the paper feeding gear.

[0009] Compared with the prior art, the utility model has the following beneficial effects:

[0010] 1. In this solution, the paper feeding tube is limited by means of a connecting rod. First, the paper feeding tube is placed on the two externally threaded bearings on the base side plate. At this time, the paper feeding tube is also just located inside the first gear fixing plate and the second gear fixing plate. Then, the closing cover is closed. When the closing cover is closed, it will drive the first connecting rod on the rotating shaft. The first connecting rod will drive the second connecting rod, and the second connecting rod will drive the third connecting rod to tightly hook the paper feeding tube. Through the connecting rod transmission, it is ensured that the externally threaded bearing is tightly attached to the paper feeding tube. It is not only simple to use and convenient to operate, but also after the closing cover is closed, all the gears of the transmission part are covered by the closing cover, thus preventing the gears from being exposed and avoiding accidental injuries caused by the operator accidentally touching the gears during the operation of the device, thereby improving the safety of the device. Similarly, when the closing cover is opened, through the connecting rod transmission, the third connecting rod releases the tight hook on the paper feeding tube, so that the paper feeding tube can be easily separated from the externally threaded bearing, and thus the paper feeding tube can be lifted to replace a new printing medium. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 is a schematic diagram of the open state of a paper feeding shaft pressing device of the utility model;

[0012] Figure 2 is a schematic diagram of the closed state of a paper feeding shaft pressing device of the utility model;

[0013] Figure 3 Schematic diagram of the overall structure of the paper feeding tube, cover, first gear fixing plate, and second gear fixing plate of a paper feeding shaft pressing device of the present utility model;

[0014] Figure 4 Schematic diagram of the A-A structure of a paper feeding shaft pressing device of the present utility model;

[0015] Figure 5 Schematic diagram of the B-B structure of a paper feeding shaft pressing device of the present utility model;

[0016] Figure 6 Left view of the A-A of a paper feeding shaft pressing device of the present utility model;

[0017] Figure 7 Left view of the B-B of a paper feeding shaft pressing device of the present utility model.

[0018] In the figure: 1. Paper feeding tube; 2. External thread bearing; 3. Rotating shaft; 4. Second connecting rod; 7. Third connecting rod; 8. First connecting rod; 9. First gear fixing plate; 10. Cover; 11. Flange bearing; 12. Base side plate; 14. Paper feeding tower wheel shaft; 15. Motor gear; 16. Second gear fixing plate; 18. First tower wheel gear; 19. Gear coupling ring; 20. Retaining plate; 21. Paper feeding gear; 22. Stepping motor; 23. Second tower wheel gear; 24. Gear spacer. Specific implementation manners

[0019] In order to make the technical means, creative features, achieved purposes and effects of the present utility model easy to understand, the present utility model will be further described below in conjunction with specific implementation manners.

[0020] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "upper", "lower", "inner", "outer", "front end", "rear end", "both ends", "one end", "the other end", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present utility model. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0021] In the description of the present utility model, it should be noted that unless otherwise clearly specified and defined, terms such as "installation", "provided with", "connection", etc. shall be understood in a broad sense. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0022] As Figures 1-7 shown, a paper feeding shaft pressing device includes two base side plates 12. There are two base side plates 12. A paper feeding tube 1 is jointly installed at the upper ends of the two base side plates 12. Paper feeding gears 21 are installed on both the left part and the right part of the outer surface of the paper feeding tube 1. One - gear fixing plates 9 are installed at the opposite ends of the two base side plates 12. Two - gear fixing plates 16 are installed at the opposite ends of the two one - gear fixing plates 9. Covers 10 are hinged between the left inner walls and the right inner walls of the two one - gear fixing plates 9.

[0023] Two external - thread bearings 2 are installed at the upper part of the left end of the base side plate 12. A rotating shaft 3 is jointly installed between the left inner wall and the right inner wall of the cover 10. A first connecting rod 8 is installed on the outer surface of the rotating shaft 3. The front part of the left end of the first connecting rod 8 is hinged and installed with a second connecting rod 4. The front part of the right end of the second connecting rod 4 is hinged and installed with a third connecting rod 7. A paper feeding turret shaft 14 is jointly installed at the corresponding ends of the one - gear fixing plate 9 and the two - gear fixing plate 16. Flange bearings 11, a first turret gear 18, a second turret gear 23, and a gear spacer 24 are respectively installed on the outer surface of the paper feeding turret shaft 14. A stepping motor 22 is fixedly installed at the left end of the two - gear fixing plate 16. A motor gear 15 is fixedly installed at the output end of the stepping motor 22. Retaining plates 20 are installed at both the left end and the right end of the paper feeding gear 21. A gear coupling ring 19 is installed on the outer surface of the paper feeding tube 1; the motor gear 15 is meshed and connected with the second turret gear 23, and the first turret gear 18 is meshed and connected with the paper feeding gear 21. When the cover 10 is closed, it will drive the first connecting rod 8 on the rotating shaft 3, the first connecting rod 8 will drive the second connecting rod 4, and the second connecting rod 4 will drive the third connecting rod 7 to tightly hold the paper feeding tube 1. Through the connecting - rod transmission, it is ensured that the external - thread bearing 2 is closely attached to the paper feeding tube 1. It is not only simple to use and convenient to operate, but also after the cover 10 is closed, all the gears in the transmission part are covered by the cover 10, thus preventing the gears from being exposed and avoiding accidental injuries caused by the operator accidentally touching the gears when the device is working, thereby improving the safety of the device.

[0024] It should be noted that the present utility model is a paper feeding shaft pressing device. The paper feeding tube 1 is placed on two external thread bearings 2 on the base side plate 12. At this time, the paper feeding tube 1 is also just located within the first gear fixing plate 9 and the second gear fixing plate 16. Then, the cover 10 is closed. When the cover 10 is closed, it will drive the first connecting rod 8 on the rotating shaft 3. The first connecting rod 8 drives the second connecting rod 4, and the second connecting rod 4 drives the third connecting rod 7 to tightly hook the paper feeding tube 1. Through the connecting rod transmission, it is ensured that the external thread bearing 2 is closely attached to the paper feeding tube 1. It is not only simple to use and convenient to operate, but also after the cover 10 is closed, all the gears in the transmission part are covered by the cover 10, thus preventing the gears from being exposed and avoiding accidental injuries caused by the operator accidentally touching the gears during the operation of the device, thereby improving the safety of the device. Similarly, when the cover 10 is opened, through the connecting rod transmission, the third connecting rod 7 releases the tight hook on the paper feeding tube 1, enabling the paper feeding tube 1 to be easily separated from the external thread bearing 2, so that the paper feeding tube 1 can be lifted to replace the new printing medium.

[0025] The above shows and describes the basic principles, main features and advantages of the present utility model. Those skilled in the art should understand that the present utility model is not limited by the above embodiments. What is described in the above embodiments and the specification only illustrates the principle of the present utility model. Without departing from the spirit and scope of the present utility model, the present utility model will have various changes and improvements, and these changes and improvements all fall within the scope of the present utility model claimed. The scope of protection claimed by the present utility model is defined by the appended claims and their equivalents.

Claims

1. A paper placing shaft pressing device, comprising a base side plate (12), characterized in that: There are two base side plates (12). A paper placing tube (1) is jointly installed at the upper ends of the two base side plates (12). Paper placing gears (21) are installed on both the left part and the right part of the outer surface of the paper placing tube (1). One - gear fixing plates (9) are installed at the opposite ends of the two base side plates (12). Two - gear fixing plates (16) are installed at the opposite ends of the two one - gear fixing plates (9). Covers (10) are hinged between the left inner wall and the right inner wall of the two one - gear fixing plates (9).

2. The paper feeding shaft pressing device according to claim 1, wherein: Two external - thread bearings (2) are installed at the upper part of the left end of the base side plate (12). A rotating shaft (3) is jointly installed between the left inner wall and the right inner wall of the cover (10). A first connecting rod (8) is installed on the outer surface of the rotating shaft (3). The front part of the left end of the first connecting rod (8) is hingedly installed with a second connecting rod (4). The front part of the right end of the second connecting rod (4) is hingedly installed with a third connecting rod (7). A paper placing tower - wheel shaft (14) is jointly installed at the corresponding ends of the one - gear fixing plate (9) and the two - gear fixing plate (16). A flange bearing (11), a first tower - wheel gear (18), a second tower - wheel gear (23) and a gear spacer (24) are respectively installed on the outer surface of the paper placing tower - wheel shaft (14). A stepping motor (22) is fixedly installed at the left end of the two - gear fixing plate (16). A motor gear (15) is fixedly installed at the output end of the stepping motor (22). Stop pieces (20) are installed at both the left end and the right end of the paper placing gear (21). A gear connecting ring (19) is installed on the outer surface of the paper placing tube (1).

3. The paper feeding shaft pressing device according to claim 2, characterized in that: The motor gear (15) is meshed and connected with the second tower - wheel gear (23). The first tower - wheel gear (18) is meshed and connected with the paper placing gear (21).

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