Paper rubbing mechanism

Abstract

The utility model discloses a paper rubbing mechanism, which comprises a medium conveying channel, the upper pickup roller set and the lower pickup roller set are correspondingly arranged on the upper side and the lower side of the medium conveying channel respectively, and the upper pickup roller set and the lower pickup roller set are configured to rotate relative to each other; the upper pickup roller group comprises a plurality of upper pickup rollers which are arranged in parallel and horizontally, the lower pickup roller group comprises a plurality of lower pickup rollers which are arranged in parallel and horizontally, and the upper pickup rollers and the lower pickup rollers are arranged in a staggered manner. According to the paper pickup device, the upper paper pickup wheel set and the lower paper pickup wheel set are oppositely arranged up and down, the paper pickup wheels of the upper paper pickup wheel set and the lower paper pickup wheel set are respectively arranged in a staggered manner, and the surfaces of the paper pickup wheels are prevented from sliding by utilizing transverse force between staggered parts, so that paper jamming is avoided, and the paper pickup efficiency is improved. The utility model also provides a printer.

Description

Technical Field

[0001] The utility model relates to the field of printing equipment, in particular to a paper rubbing mechanism. Background Art

[0002] During the printing process, paper is one of the most important materials. Paper in the printing device is usually stored in a paper box. Most of the current paper boxes transport paper to the printing mechanism through transmission mechanisms such as rubber rollers and pickup rollers. However, during the transmission process, it is very easy for the friction between the paper and the pickup roller to be insufficient, which can cause paper jams and other undesirable phenomena, thus affecting printing. In particular, when there is not much paper left in the paper box, the printing paper cannot fully contact the pickup roller, and it is difficult for the pickup roller to transport the paper normally.

[0003] Therefore, how to solve the above problems has become a technical problem that needs to be solved urgently in the industry. Utility Model Content

[0004] Purpose of the utility model: In order to overcome the deficiencies in the prior art, the utility model provides a paper picking mechanism and a printer using the paper picking mechanism.

[0005] Technical solution: A paper rubbing mechanism, comprising:

[0006] Medium conveying channel;

[0007] An upper pickup wheel group and a lower pickup wheel group are respectively arranged on the upper and lower sides of the medium conveying channel, and the upper pickup wheel group and the lower pickup wheel group are configured to be relatively rotatable;

[0008] The upper pickup wheel group includes a plurality of upper pickup wheels arranged in parallel and horizontally, and the lower pickup wheel group includes a plurality of lower pickup wheels arranged in parallel and horizontally, and the upper pickup wheels and the lower pickup wheels are arranged in an alternating manner.

[0009] Furthermore, the medium conveying channel is configured on a machine platform, the lower paper pickup wheel group is buried under the machine platform surface, and the top of the lower paper pickup wheel group is exposed from the machine platform surface, and a driving component is provided on one side of the machine platform surface, and the driving component drives and connects the lower paper pickup wheel group.

[0010] Furthermore, a mounting frame is provided on the machine platform, a bracket is provided on the mounting frame, the bracket is connected to the mounting frame in an adjustable height, and the upper paper pickup wheel group is rotatably connected to the bottom of the bracket.

[0011] Furthermore, the mounting frame includes a beam arranged above the bracket, the upper part of the bracket is elastically connected to the bottom of the beam through an elastic member, a threaded hole is opened on the beam corresponding to the bracket, an adjusting bolt is arranged in the threaded hole, and the bottom of the adjusting bolt abuts against the top of the bracket.

[0012] Furthermore, the upper paper pickup wheel group is configured as an eccentric wheel group.

[0013] Furthermore, outer edges of the upper pickup wheel and the lower pickup wheel are both covered with a wear-resistant layer.

[0014] Furthermore, the upper pickup wheel group is also driven and connected to a height adjustment component for adjusting the rotation angle of the upper pickup wheel so as to adjust the gap between the upper pickup wheel group and the lower pickup wheel group.

[0015] Furthermore, the height adjustment component includes: a rotating shaft drivingly connected to the upper paper pickup wheel group, a worm wheel is provided at the tail of the rotating shaft, the worm wheel is drivingly connected to a worm, a knob is provided on the top of the worm, when the knob is rotated, the worm drives the worm wheel to rotate, thereby driving the upper paper pickup wheel group to rotate, and when the knob stops rotating, the upper paper pickup wheel group remains stable due to the self-locking effect of the worm wheel and the worm.

[0016] Furthermore, the worm gear sleeve is arranged on the driving rod, the front end of the driving rod is provided with a keyway, the bottom end of the keyway is provided with a countersunk hole whose hole diameter gradually decreases along the hole depth direction, and the corresponding tail end of the rotating shaft is provided with a boss whose diameter gradually decreases along the rotating shaft direction, and the front side of the boss is provided with a key arranged corresponding to the shape of the keyway.

[0017] Beneficial effect: The paper picking mechanism of the utility model is provided with an upper paper picking wheel group and a lower paper picking wheel group which are arranged opposite to each other in an upper and lower direction, and the paper picking wheels of the upper paper picking wheel group and the lower paper picking wheel group are arranged alternately, and the lateral force between the alternations is utilized to avoid sliding of the paper picking wheel surface, thereby avoiding paper jam and improving the paper picking efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Attached Figure 1 It is a three-dimensional structural schematic diagram of the embodiment 1 of the paper picking mechanism of the utility model;

[0019] Attached Figure 2 It is a three-dimensional structural schematic diagram of the embodiment 2 of the paper picking mechanism of the utility model;

[0020] Attached Figure 3 for Figure 2 A schematic diagram of a three-dimensional structure of a height adjustment component of a paper picking mechanism;

[0021] Attached Figure 4 for Figure 2Schematic diagram of the exploded structure of the rotating shaft part of the paper picking mechanism shown. DETAILED DESCRIPTION

[0022] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the utility model and are not used to limit the utility model. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

[0023] It should be noted that the descriptions of "first", "second", etc. in the present utility model are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in the field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present utility model.

[0024] See also Figure 1 The embodiment 1 of a paper pickup mechanism of the utility model shown in the figure comprises: a medium conveying channel 11 and an upper paper pickup wheel group 2 and a lower paper pickup wheel group 3 respectively arranged on the upper and lower sides of the medium conveying channel 11, wherein the upper paper pickup wheel group 2 and the lower paper pickup wheel group 3 are configured to be relatively rotatable.

[0025] The upper pickup wheel group 2 includes a plurality of upper pickup wheels which are arranged parallel and horizontally concentrically, and the lower pickup wheel group 3 includes a plurality of lower pickup wheels which are arranged parallel and horizontally concentrically, and the upper pickup wheels and the lower pickup wheels are arranged in an alternating manner.

[0026] By arranging an upper pickup wheel group 2 and a lower pickup wheel group 3 which are arranged opposite to each other in an upper and lower direction, and staggering the pickup wheels of the upper pickup wheel group 2 and the lower pickup wheel group 3, the lateral force between the staggered portions is utilized to avoid slippage on the pickup wheel surfaces, thereby avoiding paper jams and improving the pickup efficiency.

[0027] Specifically, the medium conveying channel 11 is configured on a machine table 1, the lower pickup roller group 3 is buried under the table surface of the machine table 1, and the top of the lower pickup roller group 3 is exposed from the table surface of the machine table 1, and a driving component 31 is provided on one side of the table surface of the machine table 1, and the driving component 31 is driven and connected to the lower pickup roller group 3. The driving component 31 can be any existing driving component 31, such as a motor gear component, etc.

[0028] Furthermore, the machine 1 is also provided with a mounting frame 22, on which a bracket 21 is provided, and the bracket 21 is connected to the mounting frame 22 in an adjustable height, and the upper pickup wheel group 2 is rotatably connected to the bottom of the bracket 21. The bracket 21 and the upper pickup wheel group 2 are fixed by the mounting frame 22, and the height of the bracket 21 is adjusted to change the spacing between the upper pickup wheel group 2 and the lower pickup wheel group 3, thereby adjusting the height of the medium that can be transported in the medium transport channel 11.

[0029] The mounting frame 22 includes a crossbeam 221 disposed above the bracket 21. The upper part of the bracket 21 is elastically connected to the bottom of the crossbeam 221 through an elastic member 211 such as a spring. A threaded hole is provided on the crossbeam 221 corresponding to the bracket 21. An adjusting bolt 212 is provided in the threaded hole. The bottom of the adjusting bolt 212 abuts against the top of the bracket 21. By providing the elastic member, it is ensured that the medium has a certain elastic gap when being picked up and transported by the upper pickup roller group 2 and the lower pickup roller group 3, so that the surface of the medium will not be damaged. By providing the adjusting bolt 212, the height of the adjusting bolt 212 can be changed by rotating the adjusting bolt 212, thereby changing the distance between the upper pickup roller group 2 and the lower pickup roller group 3, thereby adjusting the height of the medium that can be transported in the medium transport channel 11.

[0030] See also Figure 2-4 The embodiment 2 of the paper pickup mechanism of the utility model shown is different from the embodiment 1 in that the upper paper pickup wheel group 2 is configured as an eccentric wheel group, and the upper paper pickup wheel group 2 does not rotate with the medium being transported. Specifically, the outer edges of the upper paper pickup wheel and the lower paper pickup wheel are both covered with a wear-resistant layer, and the upper paper pickup wheel presses the transported medium to transport the medium together with the lower paper pickup wheel.

[0031] Furthermore, the upper pickup wheel assembly 2 is also driven and connected to a height adjustment assembly 4 for adjusting the rotation angle of the upper pickup wheel so as to adjust the gap between the upper pickup wheel assembly 2 and the lower pickup wheel assembly 3 .

[0032] Specifically, the height adjustment component 4 includes: a rotating shaft 24 drivingly connected to the upper pickup wheel group 2, a worm wheel 44 is provided at the tail of the rotating shaft 24, the worm wheel 44 is drivingly connected to a worm 43, a knob 41 is provided at the top of the worm 43, when the knob 41 is rotated, the worm 43 drives the worm wheel 44 to rotate, thereby driving the upper pickup wheel group 2 to rotate, and when the knob 41 stops rotating, the upper pickup wheel group 2 remains stable due to the self-locking effect of the worm wheel 44 and the worm 43. In this way, the upper pickup wheel group 2 is ensured to be at a fixed angle, and the distance between the upper pickup wheel group 2 and the lower pickup wheel group 3 can be changed at any time by the knob 41, thereby adjusting the height of the medium that can be transported in the medium transport channel 11.

[0033] In some preferred embodiments, the worm wheel 44 is sleeved on the driving rod 441, the front end of the driving rod 441 is provided with a key slot 443, the bottom end of the key slot 443 is provided with a countersunk hole 442 with a diameter gradually decreasing along the hole depth direction, and the corresponding rear end of the rotating shaft 24 is provided with a boss 241 with a diameter gradually decreasing along the rotating shaft 24 direction, and the front side of the boss 241 is provided with a key 242 corresponding to the shape of the key slot 443. In this way, the boss 241 and the key 242 provided at the front end of the rotating shaft 24, and the countersunk hole 442 and the key slot 443 provided on the driving rod 441 realize the quick disassembly and assembly of the rotating shaft 24, which can facilitate the user to replace and repair the upper pickup wheel assembly 2 at any time.

[0034] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. A paper picking mechanism, characterized in that: include: Medium conveying channel; An upper pickup wheel group and a lower pickup wheel group are respectively arranged on the upper and lower sides of the medium conveying channel, and the upper pickup wheel group and the lower pickup wheel group are configured to be relatively rotatable; The upper pickup wheel group includes a plurality of upper pickup wheels arranged in parallel and horizontally, and the lower pickup wheel group includes a plurality of lower pickup wheels arranged in parallel and horizontally, and the upper pickup wheels and the lower pickup wheels are arranged in an alternating manner.

2. The paper picking mechanism according to claim 1, characterized in that: The medium conveying channel is arranged on a machine platform, the lower paper pickup wheel group is buried under the machine platform surface, and the top of the lower paper pickup wheel group is exposed from the machine platform surface, and a driving component is provided on one side of the machine platform surface, and the driving component drives and connects the lower paper pickup wheel group.

3. The paper picking mechanism according to claim 2, characterized in that: The machine platform is also provided with a mounting frame, on which a bracket is arranged. The bracket is connected to the mounting frame in an adjustable height, and the upper paper pickup wheel group is rotatably connected to the bottom of the bracket.

4. The paper picking mechanism according to claim 3, characterized in that: The mounting frame includes a crossbeam arranged above the bracket, the upper part of the bracket is elastically connected to the bottom of the crossbeam through an elastic member, a threaded hole is opened on the crossbeam corresponding to the bracket, an adjusting bolt is arranged in the threaded hole, and the bottom of the adjusting bolt abuts against the top of the bracket.

5. The paper picking mechanism according to claim 2, characterized in that: The upper paper pickup wheel group is configured as an eccentric wheel group.

6. The paper picking mechanism according to claim 5, characterized in that: The outer edges of the upper pickup wheel and the lower pickup wheel are both covered with a wear-resistant layer.

7. The paper picking mechanism according to claim 5, characterized in that: The upper pickup wheel group is also driven and connected with a height adjustment component, which is used to adjust the rotation angle of the upper pickup wheel so as to adjust the gap between the upper pickup wheel group and the lower pickup wheel group.

8. The paper pickup mechanism according to claim 7, characterized in that: The height adjustment component includes: a rotating shaft drivingly connected to the upper paper pickup wheel group, a worm wheel is provided at the tail of the rotating shaft, the worm wheel is drivingly connected to a worm, a knob is provided on the top of the worm, when the knob is rotated, the worm drives the worm wheel to rotate, thereby driving the upper paper pickup wheel group to rotate, and when the knob stops rotating, the upper paper pickup wheel group remains stable due to the self-locking effect of the worm wheel and the worm.

9. The paper pickup mechanism according to claim 8, characterized in that: The worm gear sleeve is arranged on the driving rod, and a keyway is arranged at the front end of the driving rod, and a countersunk hole with a hole diameter gradually decreasing along the hole depth direction is arranged at the bottom end of the keyway, and a boss with a diameter gradually decreasing along the rotating shaft direction is correspondingly arranged at the tail end of the rotating shaft, and a key corresponding to the shape of the keyway is arranged on the front side of the boss.

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