Unreeling device of rotary press

Abstract

The utility model relates to the technical field of rotary press unreeling, in particular to an unreeling device of a rotary press, which comprises a bottom plate and a plurality of stand column supports, the lower portions of the plurality of stand column supports are fixedly connected with the bottom plate, a base is fixedly connected with the right portion of the rear side of the upper portion of the bottom plate, and a supporting assembly is installed at the tail end of an output shaft of a servo motor. A tightening assembly is installed on the outer wall of the stand column support, and a plurality of rotating rollers are arranged on the lower portion of the inner wall of the stand column support. Through cooperation of a first screw rod, a sleeve, a supporting plate and a supporting plate, the supporting plate moves forwards to push the supporting plate to be unfolded outwards, due to the fact that the supporting plate can freely stretch out and draw back within a certain stroke, printing paper tubes with different inner wall sizes can be fed and assembled, the feeding process is fast, only the printing paper tubes need to be inserted, and then the first screw rod is rotated; the problems that in the feeding process of the printing paper tubes, feeding and assembling cannot be conducted on the printing paper tubes with different inner wall sizes, and the feeding process is tedious are effectively solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of unwinding of rotary printing machine, specifically to an unwinding device of rotary printing machine. BACKGROUND

[0002] Rotary printing machine is a kind of printing machine, wherein the image to be printed is curved around a cylinder, and can be printed on various substrates, including paper, paperboard and plastic, the substrate can be single sheet feeding, or can be unwound on continuous roller to print through the printing machine, thus the unwinding device of rotary printing machine needs to be used, for example, the unwinding device of rotary printing machine with the application number "202421218853.8", the bottom plate is fixedly provided with an unwinding mechanism on one side, and the unwinding mechanism is fixedly provided with a cutting mechanism on one side.

[0003] However, although it can achieve good cutting of paper, the prior art mostly uses bolt positioning printing paper cylinder, which cannot assemble and feed printing paper cylinders with different inner wall sizes during the feeding process of printing paper cylinder, and the feeding process is relatively complicated, and the preset tensioning pressure of printing paper cannot be adjusted to further ensure the tensioning effect of printing paper, which leads to the problem of reduced tensioning effect of printing paper after long-term use. UTILITY MODEL CONTENT

[0004] The utility model aims at solving the problems of the device, which cannot assemble and feed printing paper cylinders with different inner wall sizes during the feeding process of printing paper cylinder, and the feeding process is relatively complicated, and the preset tensioning pressure of printing paper cannot be adjusted to further ensure the tensioning effect of printing paper, which leads to the problem of reduced tensioning effect of printing paper after long-term use, and provides an unwinding device of rotary printing machine.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical scheme:

[0006] An unwinding device of rotary printing machine is designed, which comprises a bottom plate and a column support, a plurality of column supports are fixedly connected with the bottom plate below, a base is fixedly connected to the upper rear right part of the bottom plate, a servo motor is fixedly connected to the rear side of the base, a support assembly is installed at the output shaft end of the servo motor, a tensioning assembly is installed on the outer wall of the column support, and a plurality of rotating rollers are arranged on the inner wall below the column support.

[0007] Preferably, the support assembly comprises a baffle, a rotating shaft, the rotating shaft is fixedly connected to the front side of the output shaft of the servo motor, the outer wall of the rotating shaft is fixedly connected with the baffle, the front side of the outer wall of the rotating shaft is fixedly connected with a convex strip, the convex strip and the outer wall of the rotating shaft are slidably connected with a sleeve, the front inner wall of the sleeve is rotatably connected with a screw rod one through a bearing, the rear side of the screw rod one is threadedly connected with the inner wall of the rotating shaft, the outer wall of the sleeve is fixedly connected with a plurality of supporting plates, the four inner walls of the baffle are slidably connected with supporting plates, and the limiting bolts fixedly connected to the outer wall of the supporting plates are slidably connected with the inclined grooves in the inner wall of the supporting plates.

[0008] Preferably, the rotating parts of the lower rollers are rotatably connected with the column supports through bearings on both sides, and the rotating parts of the upper rollers are rotatably connected with bearing housings through bearings on both sides.

[0009] Preferably, the outer wall of the bearing housing is slidably connected with the column support, the upper side of the bearing housing is rotatably connected with an adjusting bolt, and the outer wall of the adjusting bolt is threadedly connected with the column support.

[0010] Preferably, the tensioning assembly comprises a box body, a main beam and springs, a plurality of box bodies are fixedly connected to the outer wall of the left part of the column support respectively, the inner wall of the main beam is rotatably connected with the outer wall of the protruding shaft of the column support, a press roller is rotatably connected to one side end of the main beam, a round rod is slidably connected to the other side inner wall of the main beam, the end of the round rod is fixedly connected with a lower cross plate, the upper inner wall of the box body is rotatably connected with a screw rod two through a bearing, the outer wall of the screw rod two is threadedly connected with an upper cross plate below, the outer walls of the upper cross plate and the lower cross plate are slidably connected with the box body through sliding blocks, and the two sides of a plurality of springs are fixedly connected with the upper cross plate and the lower cross plate respectively.

[0011] Preferably, the output shaft of the servo motor is provided with a locking structure.

[0012] The unwinding device of the rotary printing machine has the beneficial effects that:

[0013] Through the cooperation between the screw rod one, the sleeve, the supporting plate and the supporting plate, the screw rod one is rotated to drive the sleeve and the supporting plate to move forward, and since the limiting bolts fixedly connected to the outer wall of the supporting plate are slidably connected with the inclined grooves in the inner wall of the supporting plate, the forward movement of the supporting plate can push the supporting plate to expand outward until the supporting plate abuts against the inner wall of the printing paper cylinder, and the installation of the printing paper cylinder is completed.

[0014] Through cooperation between the screw two, the spring, the compression roller, the round rod and the main beam, the user can rotate the screw two, the screw two can drive the upper horizontal plate to adjust the position downward, and the initial state of the spring extrusion is further adjusted, so that even if the spring elasticity effect is reduced, the down pressure of the round rod can be ensured through adjusting the initial extrusion state, and because the two sides of the main beam are in a lever structure, a small part of the round rod can drive the compression roller to rotate a large angle, so that the reliability of the printing paper is higher, and the problem that the printing paper cannot be adjusted to further ensure the preset pressure of the printing paper to further ensure the printing paper is avoided, and the problem that the printing paper is reduced after long-term use. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 It is a front side appearance structure schematic view of the utility model;

[0016] Figure 2 It is a rear side appearance structure schematic view of the utility model;

[0017] Figure 3 It is a structure schematic view of the utility model Figure 1 in the middle stand support;

[0018] Figure 4 It is a left side structure schematic view of the utility model in the base;

[0019] Figure 5 It is a rear side partial structure schematic view of the utility model Figure 4 ;

[0020] Figure 6 It is a main view partial structure schematic view of the utility model Figure 3 ;

[0021] In the drawing: 1, bottom plate, 2, stand support, 3, support assembly, 301, baffle, 302, support plate, 303, sleeve, 304, screw one, 305, pivot, 306, convex strip, 307, support plate, 4, tightness assembly, 401, box, 402, compression roller, 403, main beam, 404, round rod, 405, screw two, 406, upper horizontal plate, 407, spring, 408, lower horizontal plate, 5, rotating roller, 6, adjusting bolt, 7, bearing seat, 8, locking structure, 9, servo motor, 10, base. DETAILED DESCRIPTION

[0022] The utility model will be further described below in combination with the drawings:

[0023] Refer to the attached Figures 1-6The unwinding device of the rotary printing machine comprises a bottom plate 1, a plurality of column supports 2, a base 10, a servo motor 9, a supporting assembly 3, a tensioning assembly 4 and a plurality of rotating rollers 5.

[0024] The outer wall of the bearing seat 7 is slidably connected with the column support 2, the upper portion of the bearing seat 7 is rotatably connected with an adjusting bolt 6, the rotation of the adjusting bolt 6 can drive the bearing seat 7 to adjust the height, thereby adjusting the gap between the upper and lower rotating rollers 5, and the outer wall of the adjusting bolt 6 is threadedly connected with the column support 2, the outer wall of the output shaft of the servo motor 9 is provided with a locking structure 8, the locking structure 8 is a brake disc structure in the prior art, which is composed of brake pads on both sides, a brake disc fixed with the output shaft of the servo motor 9 at the center and a threaded rod structure for driving the brake pads to be inwardly pressed on the brake disc to achieve locking.

[0025] Referring to the accompanying drawings Figures 1-6 In the embodiment, the supporting assembly 3 comprises a baffle 301 and a rotating shaft 305, the rotating shaft 305 is fixedly connected to the front side of the output shaft of the servo motor 9, the outer wall of the rotating shaft 305 is fixedly connected with the baffle 301, the outer wall of the front side of the rotating shaft 305 is fixedly connected with a convex strip 306, a sleeve 303 can slide forward and backward on the outer wall of the convex strip 306 and realize rotation transmission in the sliding process, the sleeve 303 is slidably connected with the outer wall of the convex strip 306 and the rotating shaft 305, the front inner wall of the sleeve 303 is rotatably connected with a screw rod 1 through a bearing, the rear side of the screw rod 1 is threadedly connected with the inner wall of the rotating shaft 305, the outer wall of the sleeve 303 is fixedly connected with a plurality of supporting plates 307, the forward and backward movement of the supporting plates 307 can drive the supporting plates 302 to be outwardly opened through limiting bolts, the four inner walls of the baffle 301 are slidably connected with the supporting plates 302, and the limiting bolts fixedly connected with the outer wall of the supporting plates 302 are slidably connected with the inclined grooves in the inner wall of the supporting plates 307.

[0026] Referring to the accompanying drawings Figures 1-6In the embodiment, the tensioning assembly 4 comprises a box body 401, a main beam 403 and a spring 407, a plurality of box bodies 401 are fixedly connected to the left part of the outer wall of the column support 2 respectively, the left and right sides of the main beam 403 are distributed in a length ratio of 1:1.5, the inner wall of the main beam 403 is rotationally connected to the outer wall of the protruding shaft of the column support 2, the side end of the main beam 403 is rotationally connected to the compression roller 402, the inner wall of the other side of the main beam 403 is slidingly connected to the round rod 404, the end of the round rod 404 is fixedly connected to the lower horizontal plate 408, the upper inner wall of the box body 401 is rotationally connected to the screw rod two 405 through a bearing, the lower outer wall of the screw rod two 405 is threadedly connected to the upper horizontal plate 406, the outer walls of the upper horizontal plate 406 and the lower horizontal plate 408 are slidingly connected to the box body 1 through a sliding block, the spring constant of the spring 407 can be determined according to specific use requirements, and the two sides of a plurality of springs 407 are fixedly connected to the upper horizontal plate 406 and the lower horizontal plate 408 respectively.

[0027] Working principle:

[0028] When the unwinding device of the rotary printing machine needs to be used, first of all, the user can install the bottom plate 1 on the corresponding platform of the rotary printing machine through the threaded holes in the four corners and external bolts, then insert the inner wall of the printing paper cylinder that needs to be unwound into the outer walls of a plurality of supporting plates 302, and abut one side of the printing paper cylinder against the front side of the baffle 301, and then rotate the screw rod one 304 (which can be rotated by using a wrench or the like), so that the screw rod one 304 is rotated to drive the sleeve 303 and the supporting plate 307 to move forward, and since the limiting bolts fixedly connected to the outer walls of the supporting plates 302 are slidingly connected to the inclined grooves in the inner wall of the supporting plate 307, the forward movement of the supporting plate 307 can push the supporting plates 302 to expand outward until the supporting plates 302 are tightly abutted against the inner wall of the printing paper cylinder, and the installation of the printing paper cylinder is completed. Since the supporting plates 302 can freely stretch and retract within a certain stroke, different inner wall sizes of the printing paper cylinder can be assembled, and the feeding process is relatively fast, that is, the printing paper cylinder only needs to be inserted and then the screw rod one 304 is rotated, thereby effectively avoiding the problem that different inner wall sizes of the printing paper cylinder cannot be fed and assembled during the feeding process of the printing paper cylinder, and the feeding process is relatively complicated.

[0029] After installation, the printing paper end on the outer wall of the printing paper tube is removed, and it is passed over the pressure roller 402, finally passing between the three rotating rollers 5 and conveyed into the interior of the external rotary printing press. During this process, the pressure roller 402 and the rotating rollers 5 are pressed together to ensure the printing paper is taut. In actual use, if the printing paper becomes loose, it is compressed by the spring force of the spring 407, causing the lower horizontal plate 408 to drop due to the spring force of the spring 407. This, in turn, drives the round rod 404 to move downward. The round rod 404 can then push the main beam 403 to rotate, driving the pressure roller 402 to rotate upward to further tighten the printing paper. However, as the usage time increases, the spring force of the spring 407 will further decrease. Therefore, by rotating screw 405, the user can drive the upper crossbeam 406 downward to adjust its position, thereby further adjusting the initial state of the spring 407 compression. Even if the elasticity of the spring 407 decreases, the downward pressure of the round rod 404 can still be maintained by adjusting the initial compression state. At the same time, because the two sides of the main beam 403 are lever structures, a small section of the round rod 404 can drive the pressure roller 402 to rotate at a large angle, making the reliability of the printing paper tensioning greater. This effectively avoids the problem of reduced tensioning effect of the printing paper after long-term use due to the inability to adjust the preset tensioning pressure of the printing paper to further ensure the tensioning effect.

[0030] In practical use, the height of the bearing seat 7 and the upper roller 5 can be adjusted by rotating the adjusting bolt 6, thereby adjusting the gap size between the upper and lower rollers 5. In the event of a temporary stop during rotary printing, the self-locking capability of the existing servo motor 9 can lock the position of the printing paper tube. Then, the output shaft angle of the servo motor 9 can be locked by the locking structure 8. The locking structure 8 is a brake disc structure in the prior art, consisting of brake pads on both sides, a brake disc fixed to the output shaft of the servo motor 9 in the center, and a threaded rod structure that drives the brake pads inward. The rotation of the threaded rod structure drives the brake pads on both sides inward and presses them against the brake disc to achieve locking. This structure is a mature and publicly available technology, so it will not be described in detail. After the printing paper on the surface of the printing paper tube is completely unwound, the user can rotate the screw 304 in reverse to drive the sleeve 303 and the support rod 307 back, further causing the support plate 302 to retract inward, releasing the tightness with the inner wall of the printing paper tube. Then, the printing paper tube can be removed and replaced with a new printing paper tube.

[0031] Although the present invention has been illustrated and described with reference to preferred embodiments, those skilled in the art should understand that various changes in form and detail are possible within the scope of the claims.

Claims

1. An unwinding device for a rotary printing press, comprising a base plate (1) and column supports (2), wherein the lower sides of a plurality of said column supports (2) are fixedly connected to the base plate (1), characterized in that: A base (10) is fixed to the upper rear right side of the base plate (1), a servo motor (9) is fixed to the rear side of the base (10), a support assembly (3) is installed at the end of the output shaft of the servo motor (9), a tensioning assembly (4) is installed on the outer wall of the column bracket (2), and multiple rollers (5) are provided below the inner wall of the column bracket (2).

2. The unwinding device of the rotary printing press according to claim 1, characterized in that: The support assembly (3) includes a baffle (301) and a rotating shaft (305). The rotating shaft (305) is fixedly connected to the front side of the output shaft of the servo motor (9). The baffle (301) is fixedly connected to the outer wall of the rotating shaft (305). A protrusion (306) is fixedly connected to the front side of the outer wall of the rotating shaft (305). A sleeve (303) is slidably connected to the protrusion (306) and the outer wall of the rotating shaft (305). The inner wall of the front side of the sleeve (303) is rotatably connected to the screw (304) through a bearing. The rear side of the screw (304) is threadedly connected to the inner wall of the rotating shaft (305). Multiple support plates (307) are fixedly connected to the outer wall of the sleeve (303). Support plates (302) are slidably connected to the four square inner walls of the baffle (301). The limiting bolts fixed to the outer wall of the support plate (302) are slidably connected to the inclined grooves of the inner wall of the support plate (307).

3. The unwinding device of the rotary printing press according to claim 1, characterized in that: The rotating part of the lower roller (5) is rotatably connected to the column support (2) through bearings on both sides, and the rotating part of the upper roller (5) is rotatably connected to the bearing seat (7) through bearings on both sides.

4. The unwinding device of the rotary printing press according to claim 3, characterized in that: The outer wall of the bearing seat (7) is slidably connected to the column bracket (2), and an adjusting bolt (6) is rotatably connected to the top of the bearing seat (7), and the outer wall of the adjusting bolt (6) is threadedly connected to the column bracket (2).

5. The unwinding device of the rotary printing press according to claim 1, characterized in that: The tensioning assembly (4) includes a housing (401), a main beam (403), and a spring (407). Multiple housings (401) are fixedly connected to the left side of the outer wall of the column support (2). The inner wall of the main beam (403) is rotatably connected to the outer wall of the protruding shaft of the column support (2). A pressure roller (402) is rotatably connected to one end of the main beam (403), and a round rod (404) is slidably connected to the inner wall of the other side of the main beam (403). The end of 04) is fixedly connected to the lower horizontal plate (408). The upper inner wall of the box (401) is rotatably connected to the screw two (405) through a bearing. The lower outer wall of the screw two (405) is threadedly connected to the upper horizontal plate (406). The outer walls of the upper horizontal plate (406) and the lower horizontal plate (408) are slidably connected to the box (401) through a slider. The two sides of the multiple springs (407) are fixedly connected to the upper horizontal plate (406) and the lower horizontal plate (408) respectively.

6. The unwinding device of the rotary printing press according to claim 1, characterized in that: The output shaft of the servo motor (9) is fitted with a locking structure (8).

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