Printing paper tension adjusting mechanism

Abstract

The utility model belongs to the technical field of printing, and particularly relates to a printing paper tension adjusting mechanism which comprises a bottom plate, vertical plates are fixed above the front end and the rear end of the bottom plate, a lower guide roller is installed between the two vertical plates through a bearing, a second gear is fixedly arranged on the outer side of the rear end of the lower guide roller in a sleeved mode, and a support is fixed above the rear portion of the bottom plate. And a driving motor is fixedly installed at the top of the support, the output end of the driving motor is fixedly connected with the rear end of a lower guide roller, tensioning adjusting assemblies are arranged above the lower guide roller in a bilateral symmetry mode, and a driving assembly is installed above the front end of the bottom plate. The two upper guide rollers are located on the left side and the right side of the lower guide roller respectively and press the paper at the same time, the paper can be straightened conveniently, and straight conveying of the paper is guaranteed.

Description

TECHNICAL FIELD

[0001] The utility model belongs to printing technical field, especially is involved in a kind of printing paper tension adjusting mechanism. BACKGROUND

[0002] Printing is to make original copy such as text, picture, photo through multiple processes, make ink transfer to the surface of paper and other materials, batch copy original content technology.In printing process, paper appears slack or over-tightening, which will affect printing, so paper tension adjusting mechanism needs to be installed.

[0003] In the Chinese utility model patent with announcement number CN219429317U, a printing paper tension adjusting mechanism is disclosed, which controls the second transmission roller to rotate around the first transmission roller along the semicircular guide groove inside the support plate by rotating the worm, so as to extrude and tighten the paper between the first and second transmission rollers, and realize convenient regulation and control of the tension of the printing paper.

[0004] Through retrieval, it is found that the above-mentioned comparative document realizes tension adjustment of paper in an extrusion manner by controlling the second transmission roller to rotate around the first transmission roller, but after extrusion, the paper is prone to bending, which will cause certain interference and adverse effects on subsequent printing and cutting work.Therefore, it is urgent to improve the existing printing paper tension adjusting mechanism and provide a printing paper tension adjusting mechanism. UTILITY MODEL CONTENT

[0005] The utility model aims at the deficiencies in the prior art, and provides a printing paper tension adjusting mechanism with reasonable design, simple structure, straightening function and flat paper transmission, to solve the problems in the prior art.

[0006] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme:

[0007] A printing paper tension adjusting mechanism includes a bottom plate, vertical plates are fixed above the front and rear ends of the bottom plate, a lower guide roller is installed between the two vertical plates through a bearing, a second gear is fixedly sleeved on the outer side of the rear end of the lower guide roller, a support is fixed above the rear of the bottom plate, a driving motor is fixedly installed on the top of the support, the output end of the driving motor is fixedly connected with the rear end of the lower guide roller, tension adjusting assemblies are symmetrically arranged above the lower guide roller, and a driving assembly is installed above the front end of the bottom plate.

[0008] As a preferred embodiment, two slide grooves are symmetrically arranged in each vertical plate about the axis, and the two slide grooves are arc-shaped and the centers are coincided with the horizontal center line of the lower guide roller.

[0009] As a preferred implementation form, the tension adjusting assembly comprises an upper guide roller, a first gear, a connecting rod and a first bevel gear, both ends of the upper guide roller are guided to slide in the sliding grooves inside the two vertical plates respectively, a first gear is fixedly sleeved on the outer side of the rear end of the upper guide roller, a connecting rod is sleeved on the outer side of the front end of the upper guide roller through a bearing, one end of the connecting rod away from the upper guide roller is sleeved on the outer side of the front end of the lower guide roller through a bearing, and a first bevel gear is fixedly arranged on the outer side of the bottom of the connecting rod.

[0010] As a preferred implementation form, the diameters of the first gear and the second gear are equal and they are engaged with each other, the two first gears are not in contact, and the rotating directions of the two upper guide rollers are the same and opposite to the rotating direction of the lower guide roller.

[0011] As a preferred implementation form, the driving assembly comprises a servo motor and a second bevel gear, the servo motor is fixedly installed above the front end of the bottom plate, the output end of the servo motor is fixedly connected with the second bevel gear, and the second bevel gear is located between the two first bevel gears and engaged with the two first bevel gears.

[0012] As a preferred implementation form, the two groups of tension adjusting assemblies are linked through the driving assembly, and the rotating directions of the two groups of tension adjusting assemblies are always opposite.

[0013] Compared with the prior art, the paper has the following beneficial effects:

[0014] In the scheme of the paper, the paper has the following beneficial effects:

[0015] In the process of transmitting the paper between the lower guide roller and the upper guide roller, the servo motor is used to control the rotation of the second bevel gear, so that the two first bevel gears drive the two connecting rods and the two upper guide rollers to rotate around the lower guide roller as the center and along the sliding grooves, so that the paper can be extruded and tensioned, and the two upper guide rollers are located on the left and right sides of the lower guide roller and simultaneously press the paper, which is different from the comparative document, and is convenient for straightening the paper and ensuring the flat transmission of the paper.

[0016] Since the centers of the two sliding grooves coincide with the transverse center line of the lower guide roller, when the two groups of tension adjusting assemblies are controlled to rotate reversely around the lower guide roller, the two first gears can always be engaged with the second gear, when the driving motor is started to control the rotation of the lower guide roller and the second gear, the first gear is used to control the synchronous and same-direction rotation of the two upper guide rollers, and the rotating direction of the upper guide roller is opposite to the rotating direction of the lower guide roller, which is convenient for assisting the paper to be guided and conveyed, the paper transmission is more stable, and the excessive friction is avoided to cause the paper to be broken. BRIEF DESCRIPTION OF DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or prior art description, and the drawings will be described as follows:

[0018] Figure 1 It is a three-dimensional left view structure schematic diagram of the present application.

[0019] Figure 2 It is an overall top view structure schematic diagram of the present application.

[0020] Figure 3 It is a three-dimensional rear view structure schematic diagram of the present application.

[0021] Figure 4 It is a front view structure schematic diagram of the present application in working state.

[0022] Figure 5 It is a front view structure schematic diagram of the present application in tension adjusting state.

[0023] In the drawings:

[0024] 1, bottom plate; 2, vertical plate; 3, sliding groove; 4, lower guide roller; 5, tension adjusting assembly; 51, upper guide roller; 52, first gear; 53, connecting rod; 54, first conical tooth; 6, driving assembly; 61, servo motor; 62, second conical tooth; 7, second gear; 8, support; 9, driving motor. DETAILED DESCRIPTION

[0025] The embodiments described below are only a part of the embodiments of the present application, and do not represent all the embodiments consistent with the present application. Now, the exemplary embodiments will be described as follows in combination with the drawings:

[0026] As shown in Figures 1-5 The present application is a printing paper tension adjusting mechanism, which comprises a bottom plate 1, vertical plates 2 are fixed on the upper front and rear ends of the bottom plate 1, a lower guide roller 4 is rotatably arranged between the two vertical plates 2, a second gear 7 is fixedly arranged on the outer side of the rear end of the lower guide roller 4, a support 8 is fixedly arranged on the upper rear side of the bottom plate 1, a driving motor 9 is fixedly arranged on the top of the support 8, the output end of the driving motor 9 is fixedly connected with the rear end of the lower guide roller 4, tension adjusting assemblies 5 are symmetrically arranged on the upper front and rear sides of the lower guide roller 4, and a driving assembly 6 is arranged on the upper front end of the bottom plate 1.

[0027] On the basis of the above structure, two sliding grooves 3 are symmetrically arranged in the inside of each vertical plate 2 about the axis, and the two sliding grooves 3 are arc-shaped and the centers are coincided with the horizontal center line of the lower guide roller 4.

[0028] In the present embodiment, the arrangement of the sliding grooves 3 can improve the stability of the tension adjusting assembly 5 in the process of rotation adjustment.

[0029] On the basis of the above structure, the tension adjusting assembly 5 comprises an upper guide roller 51, a first gear 52, a connecting rod 53 and a first bevel gear 54, both ends of the upper guide roller 51 are guided to slide in the sliding grooves 3 located in the two vertical plates 2 respectively, the rear end of the upper guide roller 51 is fixedly sleeved with the first gear 52 outside, the front end of the upper guide roller 51 is bearing-sleeved with the connecting rod 53 outside, one end of the connecting rod 53 away from the upper guide roller 51 is bearing-sleeved on the front end of the lower guide roller 4 outside, and the bottom of the connecting rod 53 is fixedly provided with the first bevel gear 54 outside.

[0030] On the basis of the above structure, the diameters of the first gear 52 and the second gear 7 are equal and mesh with each other, the two first gears 52 are not in contact, and the rotating directions of the two upper guide rollers 51 are the same and opposite to that of the lower guide roller 4.

[0031] In the embodiment, when the lower guide roller 4 and the second gear 7 are controlled to rotate, the two first gears 52 meshing with the second gear 7 can drive the two upper guide rollers 51 to rotate respectively, so that the paper can be assisted to guide and transfer, the paper transmission is more stable, and the paper is prevented from being broken due to excessive friction.

[0032] On the basis of the above structure, the driving assembly 6 comprises a servo motor 61 and a second bevel gear 62, the servo motor 61 is fixedly installed above the front end of the bottom plate 1, the output end of the servo motor 61 is fixedly connected with the second bevel gear 62, and the second bevel gear 62 is located between the two first bevel gears 54 and meshes with the two first bevel gears 54.

[0033] On the basis of the above structure, the two groups of tension adjusting assemblies 5 are linked through the driving assembly 6, and the rotating directions of the two groups of tension adjusting assemblies 5 are always opposite.

[0034] In the embodiment, the servo motor 61 is started to control the second bevel gear 62 to rotate, so that the two first bevel gears 54 can drive the two connecting rods 53 and the two upper guide rollers 51 to rotate around the lower guide roller 4 as the center, and the paper can be extruded and tensioned.

[0035] The working principle of the utility model is as follows:

[0036] When tensioning is needed in the paper printing transmission process, the servo motor 61 can be started to control the rotation of the second bevel gear 62, and the two first bevel gears 54, which are in mesh with the second bevel gear 62, can drive the two connecting rods 53 and the two upper guide rollers 51 to rotate around the lower guide roller 4 as the center and along the sliding groove 3, so as to facilitate the extrusion tensioning of the paper, and the two upper guide rollers 51 are located on the left and right sides of the lower guide roller 4 and rotate at the same time to press the paper, which is also convenient for straightening the paper, so that the paper can still maintain a flat state after extrusion tensioning and be transmitted, avoiding affecting the subsequent printing and cutting work.

[0037] When the two groups of tensioning adjusting assemblies 5 are controlled to rotate synchronously and reversely around the lower guide roller 4, the two first gears 52 can always be in meshing state with the second gear 7, so that when the driving motor 9 is started to control the rotation of the lower guide roller 4 and the second gear 7, the first gear 52 can be used to control the synchronous and same-direction rotation of the two upper guide rollers 51, and the rotation direction of the two upper guide rollers 51 is opposite to that of the lower guide roller 4, so that it is also convenient for assisting the paper to be guided and sent, the paper transmission is more stable, and the situation that the paper is broken accidentally due to excessive friction is avoided.

[0038] It should be particularly pointed out that the servo motor 61 and the driving motor 9 are existing products, which are powered by external power supply, and are existing technical means, so they will not be described in detail.

[0039] The above is only a preferred embodiment of the present application, and does not limit the protection scope of the present application; any equivalent changes, modifications, replacements and variations made by logical analysis, reasoning or limited experiments on the basis of the existing technology according to the concept of the present application should be within the protection scope determined by the claims.

Claims

1. A printing paper tension adjustment mechanism comprising a base plate (1), characterized in that: The vertical plate (2) is fixed above the front and rear ends of the bottom plate (1), the lower guide roller (4) is bearing installed between the two vertical plates (2), the second gear (7) is fixedly sleeved on the outer side of the rear end of the lower guide roller (4), the support (8) is fixed above the rear of the bottom plate (1), the driving motor (9) is fixedly installed on the top of the support (8), the output end of the driving motor (9) is fixedly connected with the rear end of the lower guide roller (4), the tension adjusting assembly (5) is symmetrically arranged above the lower guide roller (4), and the driving assembly (6) is installed above the front end of the bottom plate (1).

2. A printed paper tension adjustment mechanism according to claim 1, wherein: The two slide grooves (3) are arc-shaped and the centers of the two slide grooves (3) coincide with the transverse center line of the lower guide roller (4).

3. A printed paper tension adjustment mechanism according to claim 2, wherein: The tension adjusting assembly (5) comprises an upper guide roller (51), a first gear (52), a connecting rod (53) and a first conical tooth (54), the two ends of the upper guide roller (51) are guided and slid in the slide grooves (3) in the interiors of the two vertical plates (2), the first gear (52) is fixedly sleeved on the outer side of the rear end of the upper guide roller (51), the connecting rod (53) is bearing sleeved on the outer side of the front end of the upper guide roller (51), one end of the connecting rod (53) away from the upper guide roller (51) is bearing sleeved on the outer side of the front end of the lower guide roller (4), and the first conical tooth (54) is fixedly arranged on the outer side of the bottom of the connecting rod (53).

4. A printed paper tension adjustment mechanism according to claim 3, wherein: The diameters of the first gear (52) and the second gear (7) are equal and meshed with each other, the two first gears (52) are not in contact, and the rotation directions of the two upper guide rollers (51) are the same and opposite to that of the lower guide roller (4).

5. A printed paper tension adjustment mechanism according to claim 4, wherein: The driving assembly (6) comprises a servo motor (61) and a second conical tooth (62), the servo motor (61) is fixedly installed above the front end of the bottom plate (1), the output end of the servo motor (61) is fixedly connected with the second conical tooth (62), and the second conical tooth (62) is located between the two first conical teeth (54) and meshes with the two first conical teeth (54).

6. A printed paper tension adjustment mechanism according to claim 5, wherein: The two groups of tension adjusting assemblies (5) are linked through the driving assembly (6), and the rotation directions of the two groups of tension adjusting assemblies (5) are always opposite.

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