Paper feeding device of sheet-fed offset press

Abstract

The utility model relates to a paper feeding device of a sheet-fed offset press, which relates to the field of printing equipment and comprises a bottom plate, an air cylinder arranged on the bottom plate, a mounting plate connected with the air cylinder, a rotary connecting mechanism arranged on the mounting plate, a paper placing plate connected with the rotary connecting mechanism and a paper straightening mechanism arranged on the paper placing plate, the rotary connecting mechanism comprises a mounting pipe arranged on the mounting plate and a connecting column arranged at the bottom of the paper placing plate, the connecting column is inserted into the mounting pipe and is rotationally connected with the mounting pipe, the paper straightening mechanism comprises four adjusting plates and a driving assembly for driving the adjusting plates to move, and the four adjusting plates are arranged in a circumferential array. The paper conveying device has the effect of conveniently adjusting the position and angle of paper, the paper straightening effect is improved, and therefore the paper conveying efficiency is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of printing equipment, in particular to a paper feeding device of a sheet-fed offset press. BACKGROUND

[0002] The offset press is a kind of flatbed printing machine, which is generally composed of plate mounting, ink application, impression and paper feeding mechanisms, and can be divided into sheet-fed offset press and web offset press. The sheet-fed offset press is mainly used for printing high-grade commercial printing products and packaging printing products, and is the mainstream of modern paper printing. When the offset press is in use, the paper needs to be conveyed by a paper feeding mechanism.

[0003] The paper feeding mechanism in the prior art generally comprises a paper feeding device and a paper conveying device. The paper feeding device mainly comprises a bearing assembly and a paper suction assembly. The bearing assembly comprises a lifting table and a driving member for driving the lifting table to move in the vertical direction, and the lifting table is used to place a paper placing plate supporting the paper. The paper suction assembly is arranged above the lifting table and is used to suck and push forward the paper on the uppermost layer of the lifting table to the paper conveying device, and then the paper is continuously conveyed forward by the paper conveying device, that is, the conveying of the paper is realized. When the paper is placed on the placing plate by manual operation, the position and angle of the paper need to be manually adjusted to reduce the influence of paper skew on the paper conveying process. However, the manual adjustment process is complicated and the adjustment effect is poor, thereby reducing the smoothness of the paper conveying process.

[0004] For the above-mentioned related technology, the inventors believe that the paper adjustment on the paper placing plate in the prior art is performed manually, the adjustment process is complicated and the adjustment effect is poor, thereby reducing the smoothness of the paper conveying process. CONTENT OF THE UTILITY MODEL

[0005] In order to solve the above technical problems, the present application provides a paper feeding device of a sheet-fed offset press.

[0006] The paper feeding device of the sheet-fed offset press provided by the present application adopts the following technical scheme:

[0007] The paper feeding device of the sheet-fed offset press comprises a bottom plate, a gas cylinder arranged on the bottom plate, a mounting plate connected with the gas cylinder, a rotating connection mechanism arranged on the mounting plate, a paper placing plate connected with the rotating connection mechanism, and a paper alignment mechanism arranged on the paper placing plate. The rotating connection mechanism comprises a mounting pipe arranged on the mounting plate and a connecting column arranged at the bottom of the paper placing plate. The connecting column is inserted into the mounting pipe and is rotationally connected with the mounting pipe. The paper alignment mechanism comprises an adjusting plate and a driving assembly for moving the adjusting plate. The number of the adjusting plates is four, and the four adjusting plates are arranged in a circumferential array.

[0008] By adopting the above technical scheme, the connecting column is rotated in the mounting pipe, that is, the angle of the paper placing plate is adjusted, when paper is needed to be added, the paper placing plate is rotated to an angle at which the paper is conveniently placed. After the staff places the paper on the paper placing plate, the driving assembly drives the four adjusting plates to move, so that the four adjusting plates adjust the paper, so that the paper is placed in order, and then the paper placing plate is rotated to be placed in order, which reduces the influence of the paper skew on the conveying process, the adjusting process is convenient and the adjusting effect is good, thereby improving the smoothness of the paper conveying process. In addition, the paper placing plate is detachably connected with the mounting pipe through the connecting column, which facilitates the disassembly and maintenance of the rotating connecting mechanism and the paper placing plate, thereby prolonging the service life of the paper placing plate and the rotating connecting mechanism.

[0009] Preferably, the driving assembly comprises a mounting sliding groove opened on the paper placing plate, a motor arranged on the paper placing plate, a lead screw arranged in the mounting sliding groove, and a sliding block. One end of the lead screw is connected with a transmission shaft of the motor, the other end is rotationally connected with the paper placing plate, the sliding block is slidingly connected with the mounting sliding groove, the sliding block is threadedly connected with the lead screw, and the sliding block is connected with the adjusting plate. The number of the driving assemblies is four, and each of the four driving assemblies is connected with one adjusting plate.

[0010] By adopting the above technical scheme, the motor drives the lead screw to rotate, the lead screw drives the sliding block to slide in the mounting sliding groove, and the sliding block drives the adjusting plate to move, so that the four adjusting plates adjust the paper, and the paper is placed in order.

[0011] Preferably, a first mounting groove is opened in the sliding block, a second mounting groove and a through hole are opened in the adjusting plate, the adjusting plate is slidingly connected with the first mounting groove, an electric telescopic rod is arranged in the first mounting groove, the electric telescopic rod extends into the second mounting groove and is connected with the adjusting plate, the electric telescopic rod is used to drive the adjusting plate to extend into the first mounting groove, and the lead screw passes through the through hole.

[0012] By adopting the above technical scheme, the electric telescopic rod drives the adjusting plate to slide in the first mounting groove, when the adjusting plate extends out of the first mounting groove, the driving assembly drives the adjusting plate to move, so that the adjusting plate adjusts the paper, after the adjustment is completed, the electric telescopic rod drives the adjusting plate to retract into the first mounting groove, thereby reducing the interference of the adjusting plate on the paper suction process, and further improving the smoothness of the paper conveying process. When the electric telescopic rod drives the adjusting plate to ascend and descend, the lead screw passes through the through hole, so that the lead screw does not interfere with the ascending and descending of the adjusting plate.

[0013] Preferably, a protective pad is arranged on the adjusting plate.

[0014] By adopting the technical scheme, the protective pad is arranged to reduce the abrasion of the paper during the adjustment, thereby improving the paper quality.

[0015] Preferably, a limiting plate is arranged at one end of the connecting column away from the paper placing plate, a third mounting groove is arranged on the sidewall of the mounting pipe, a limiting spring and a limiting block are arranged in the third mounting groove, one end of the limiting spring is connected with the limiting block, the other end of the limiting spring is connected with the mounting pipe, a connecting hole is arranged on the mounting pipe, the connecting hole is communicated with the third mounting groove, an adjusting rod is inserted in the limiting spring, one end of the adjusting rod is connected with the limiting block, and the other end of the adjusting rod passes through the connecting hole.

[0016] By adopting the technical scheme, the limiting spring pushes the limiting block to extend out of the third mounting groove, and the limiting block limits the limiting plate, thereby improving the stability of the connecting column and the paper placing plate during the rotation, and further improving the stability of the paper during the adjustment.

[0017] Preferably, a first guide inclined surface is arranged at one end of the limiting block away from the limiting spring, a second guide inclined surface is arranged on the limiting plate, and the first guide inclined surface is arranged in parallel with the second guide inclined surface.

[0018] By adopting the technical scheme, when the connecting column is inserted into the mounting pipe, the second guide inclined surface abuts against the first guide inclined surface, the paper placing plate is pressed in the direction close to the mounting plate, the limiting block is pushed to retract into the third mounting groove, and the mounting of the paper placing plate can be realized, the mounting process is simple and convenient, and the mounting efficiency of the paper placing plate is improved.

[0019] Preferably, a limiting sliding groove communicated with the third mounting groove is arranged in the mounting pipe, a limiting block is arranged at one end of the limiting block close to the limiting spring, and the limiting block is slidably connected with the limiting sliding groove.

[0020] By adopting the technical scheme, the limiting block and the limiting sliding groove improve the sliding stability of the limiting block, reduce the phenomenon that the limiting block slides out of the third mounting groove, and thereby improve the limiting stability of the limiting block to the limiting plate.

[0021] Preferably, a plurality of rolling balls are arranged at one end of the limiting plate away from the connecting column.

[0022] By adopting the technical scheme, the rolling balls improve the smoothness of the limiting plate, the connecting column and the paper placing plate during the rotation.

[0023] In summary, the application has the following beneficial technical effects:

[0024] 1. The application adjusts the angle of the paper placing plate and the paper through the rotating connecting mechanism, and adjusts the neatness of the paper by moving the four adjusting plates driven by the driving assembly, which is simple and convenient, and has good adjustment effect, thereby improving the smoothness of the paper conveying;

[0025] 2. The connecting column and the mounting pipe in the application are detachably connected, thereby facilitating the disassembly and maintenance of the paper placing plate and the rotating connecting mechanism, and thereby improving the service life of the paper placing plate and the rotating connecting mechanism. BRIEF DESCRIPTION OF DRAWINGS

[0026] Figure 1 is a structural schematic view of a paper feeding device of a sheet-fed offset press provided by an embodiment of the application;

[0027] Figure 2 is a partial cross-sectional structural schematic view of a paper aligning mechanism of the application;

[0028] Figure 3 is a partial cross-sectional structural schematic view of a mounting plate, a paper placing plate and a rotating connecting mechanism provided by an embodiment of the application;

[0029] Figure 4 is Figure 3 an enlarged schematic view of part A in

[0030] MARKED FOR REFERENCE: 1, bottom plate; 11, air cylinder; 12, mounting plate; 2, rotating connecting mechanism; 21, mounting pipe; 211, third mounting groove; 212, limiting spring; 213, limiting block; 214, connecting hole; 215, adjusting rod; 216, first guide inclined surface; 217, limiting sliding groove; 218, limiting block; 22, connecting column; 23, limiting plate; 231, second guide inclined surface; 232, ball; 3, paper placing plate; 4, paper aligning mechanism; 41, adjusting plate; 411, second mounting groove; 412, through hole; 413, electric telescopic rod; 414, protective pad; 42, driving assembly; 421, mounting sliding groove; 422, motor; 423, lead screw; 424, sliding block; 425, first mounting groove. DETAILED DESCRIPTION

[0031] The following will be further explained in detail in combination with the accompanying Figures 1-4 The application is further explained in detail.

[0032] An embodiment of the application discloses a paper feeding device of a sheet-fed offset press.

[0033] Reference is made to Figure 1 , Figure 2 and Figure 3The application discloses a paper feeding device of a sheet-fed offset press, which comprises a bottom plate 1, a pneumatic cylinder 11 arranged on the bottom plate 1, a mounting plate 12 connected with the pneumatic cylinder 11, a rotating connecting mechanism 2 arranged on the mounting plate 12, a paper feeding plate 3 connected with the rotating connecting mechanism 2 and a paper aligning mechanism 4 arranged on the paper feeding plate 3.

[0034] The paper aligning mechanism 4 comprises adjusting plates 41 and driving assemblies 42 for moving the adjusting plates 41, wherein the number of the adjusting plates 41 is four, and the four adjusting plates 41 are arranged in a circumferential array.

[0035] The driving assembly 42 comprises a mounting sliding groove 421 arranged on the paper feeding plate 3, a motor 422 fixedly arranged on the paper feeding plate 3, a lead screw 423 arranged in the mounting sliding groove 421 and a sliding block 424. One end of the lead screw 423 is fixedly connected with a transmission shaft of the motor 422, and the other end is rotatably connected with the paper feeding plate 3 through a bearing. The sliding block 424 is slidably connected with the mounting sliding groove 421, the sliding block 424 is threadedly connected with the lead screw 423, and the sliding block 424 is connected with the adjusting plate 41. The number of the driving assembly 42 is four, and the four driving assemblies 42 are respectively connected with one adjusting plate 41.

[0036] The sliding block 424 is provided with a first mounting groove 425, the adjusting plate 41 is provided with a second mounting groove 411 and a through hole 412, the adjusting plate 41 is slidably connected with the first mounting groove 425, the first mounting groove 425 is provided with an electric telescopic rod 413, the electric telescopic rod 413 extends into the second mounting groove 411 and is fixedly connected with the adjusting plate 41, the electric telescopic rod 413 is used for driving the adjusting plate 41 to extend into the first mounting groove 425, and the lead screw 423 penetrates through the through hole 412. The adjusting plate 41 is fixedly provided with a protective pad 414.

[0037] With reference to Figure 3 and Figure 4 The rotating connecting mechanism 2 comprises a mounting pipe 21 fixedly arranged on the mounting plate 12 and a connecting column 22 fixedly arranged at the bottom of the paper feeding plate 3, the connecting column 22 is inserted into the mounting pipe 21 and is rotatably connected with the mounting pipe 21.

[0038] The limiting plate 23 is fixedly arranged at the end of the connecting column 22 away from the paper placing plate 3. The side wall of the mounting pipe 21 is provided with a third mounting groove 211, and the third mounting groove 211 is provided with a limiting spring 212 and a limiting block 213. One end of the limiting spring 212 is fixedly connected with the limiting block 213, and the other end is fixedly connected with the mounting pipe 21. The mounting pipe 21 is provided with a connecting hole 214 which is in communication with the third mounting groove 211. The limiting spring 212 is provided with an adjusting rod 215, one end of which is fixedly connected with the limiting block 213, and the other end penetrates through the connecting hole 214. The adjusting rod 215 is of L-shaped structure, which is convenient for the staff to move, thereby driving the limiting block 213 to retract into the third mounting groove 211.

[0039] The end of the limiting block 213 away from the limiting spring 212 is provided with a first guide inclined surface 216, and the limiting plate 23 is provided with a second guide inclined surface 231, and the first guide inclined surface 216 is arranged in parallel with the second guide inclined surface 231.

[0040] The mounting pipe 21 is provided with a limiting sliding groove 217 in communication with the third mounting groove 211. The end of the limiting block 213 close to the limiting spring 212 is fixedly provided with a limiting block 218, and the limiting block 218 is slidingly connected with the limiting sliding groove 217.

[0041] The end of the limiting plate 23 away from the connecting column 22 is rotatably provided with a plurality of rolling balls 232. The rolling balls 232 abut against the mounting plate 12.

[0042] The implementation principle of the paper feeding device of the single sheet offset press according to the embodiment is as follows: the staff can adjust the paper placing plate 3 to rotate to an angle convenient for placing paper, and then place the paper on the paper placing plate 3. The motor 422 drives the lead screw 423 to rotate, and the lead screw 423 drives the sliding block 424 and the adjusting plate 41 to move, so that the adjusting plate 41 adjusts the paper on the paper placing plate 3, so that the paper is placed in order, and the influence of paper skew on the conveying process is reduced. The arrangement of the rolling balls 232, the limiting plate 23 and the limiting block 213 makes the rotating process of the paper placing plate 3 smooth and stable, thereby improving the stability of the paper placement. In addition, the paper placing plate 3 can be separated from the mounting plate 12. By pulling the adjusting rod 215 to make the limiting block 213 retract into the third mounting groove 211, and then taking out the connecting column 22 and the limiting plate 23 from the mounting pipe 21, the separation can be realized. The installation process of the paper placing plate 3 is also simple. Only by aligning the limiting plate 23 and the connecting column 22 with the mounting pipe 21, pressing the paper placing plate 3 downward, and pushing the limiting block 213 to retract into the third mounting groove 211 through the second guide inclined surface 231 and the first guide inclined surface 216, the installation can be realized. It is convenient to maintain the paper placing plate 3 and the rotating connecting mechanism 2, thereby improving the service life of the paper placing plate 3 and the rotating connecting mechanism 2.

[0043] The above are all preferred embodiments of the present application, and do not limit the protection scope of the present application, so that: all equivalent changes made according to the structure, shape, principle of the present application should be covered in the protection scope of the present application.

Claims

1. A paper feeding device for a sheet-fed offset printing machine, characterized in that: The device includes a base plate (1), a cylinder (11) mounted on the base plate (1), a mounting plate (12) connected to the cylinder (11), a rotating connecting mechanism (2) mounted on the mounting plate (12), a paper feeding plate (3) connected to the rotating connecting mechanism (2), and a paper straightening mechanism (4) mounted on the paper feeding plate (3). The rotating connecting mechanism (2) includes a mounting tube (21) mounted on the mounting plate (12) and a connecting column (22) mounted at the bottom of the paper feeding plate (3). The connecting column (22) is inserted into the mounting tube (21) and rotatably connected to the mounting tube (21). The paper straightening mechanism (4) includes an adjusting plate (41) and a driving component (42) that drives the adjusting plate (41) to move. There are four adjusting plates (41), and the four adjusting plates (41) are arranged in a circular array.

2. The paper feeding device for a sheet-fed offset printing machine according to claim 1, characterized in that: The drive assembly (42) includes a mounting groove (421) opened on the board (3), a motor (422) set on the board (3), a lead screw (423) and a slider (424) set in the mounting groove (421). One end of the lead screw (423) is connected to the drive shaft of the motor (422), and the other end is rotatably connected to the board (3). The slider (424) is slidably connected to the mounting groove (421), and the slider (424) is threadedly connected to the lead screw (423). The slider (424) is connected to the adjusting plate (41). There are four drive assemblies (42), and each of the four drive assemblies (42) is connected to one of the adjusting plates (41).

3. The paper feeding device for a sheet-fed offset printing machine according to claim 2, characterized in that: The slider (424) has a first mounting groove (425), the adjusting plate (41) has a second mounting groove (411) and a through hole (412), the adjusting plate (41) is slidably connected to the first mounting groove (425), the first mounting groove (425) is provided with an electric telescopic rod (413), the electric telescopic rod (413) extends into the second mounting groove (411) and is connected to the adjusting plate (41), the electric telescopic rod (413) is used to drive the adjusting plate (41) to extend into the first mounting groove (425), and the lead screw (423) passes through the through hole (412).

4. The paper feeding device for a sheet-fed offset printing machine according to claim 2, characterized in that: The adjusting plate (41) is provided with a protective pad (414).

5. The paper feeding device for a sheet-fed offset printing machine according to claim 1, characterized in that: A limiting plate (23) is provided at the end of the connecting column (22) away from the cardboard (3). A third mounting groove (211) is provided on the side wall of the mounting tube (21). A limiting spring (212) and a limiting block (213) are provided in the third mounting groove (211). One end of the limiting spring (212) is connected to the limiting block (213), and the other end is connected to the mounting tube (21). A connecting hole (214) is provided on the mounting tube (21). The connecting hole (214) communicates with the third mounting groove (211). An adjusting rod (215) is inserted in the limiting spring (212). One end of the adjusting rod (215) is connected to the limiting block (213), and the other end passes through the connecting hole (214).

6. The paper feeding device for a sheet-fed offset printing machine according to claim 5, characterized in that: The end of the limiting block (213) away from the limiting spring (212) is provided with a first guide slope (216), and the limiting plate (23) is provided with a second guide slope (231). The first guide slope (216) and the second guide slope (231) are arranged parallel to each other.

7. The paper feeding device for a sheet-fed offset printing machine according to claim 5, characterized in that: The mounting tube (21) has a limiting slide groove (217) that communicates with the third mounting groove (211). The limiting block (213) has a limiting block (218) at one end near the limiting spring (212). The limiting block (218) is slidably connected to the limiting slide groove (217).

8. The paper feeding device for a sheet-fed offset printing machine according to claim 5, characterized in that: The limiting plate (23) is provided with a plurality of ball bearings (232) at the end away from the connecting post (22).

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