A universal paper-drawing roller assembly inspection device

Abstract

The utility model discloses a general type paper rubbing wheel subassembly inspection device, wherein, the device includes base, L type slide rail, scale, limit plate and limit plate slide, two L type slide rails are arranged in parallel on the base, two slidable slide rail supports are still arranged on the base, and two slide rail supports are located between two L type slide rails, and the inboard of each slide rail support is embedded with magnet for adsorbing the metal axle rod of the paper rubbing wheel subassembly to be measured, the limit plate slide is erected between two slide rail supports, the limit plate is slidably arranged on the limit plate slide, the scale passes through the avoidance slot setting at each slide rail support bottom and is used for positioning the position of limit plate on the limit plate slide, the utility model aims at improving the detection efficiency of paper rubbing wheel subassembly and improving the detection versatility.

Description

Technical Field

[0001] This utility model relates to the field of office equipment technology, and in particular to a general-purpose paper feed roller assembly inspection device. Background Technology

[0002] Printing equipment has become an essential part of office equipment. The paper feed roller assembly, a key component of the paper delivery system in printing equipment (such as printers and copiers), functions to accurately and smoothly separate and feed paper from the paper tray into the printing engine. It achieves single-sheet paper feeding through friction, avoiding overlapping or jams, directly impacting the reliability of paper feeding and print quality. However, the traditional manual inspection methods for paper feed roller assemblies—trial assembly and visual-caliper measurement—incur technical drawbacks including: strong subjectivity (inspection results are influenced by operator experience, leading to different conclusions from different personnel), low efficiency (each product requires repeated printer assembly and disassembly, taking several minutes, which cannot meet the pace of mass production), and potential damage risks (repeated assembly and disassembly can damage precision printer components or the surface of the paper feed roller). Existing patent CN117606678A discloses a dynamic and static balance testing device for a printing equipment paper feed roller assembly. This device uses a pneumatically driven impeller assembly to rotate the paper feed roller, utilizes a detection rod and sensor to monitor radial runout, and integrates functions such as anti-oxidation spraying and defect marking. Although it achieves multi-functional integration, its structural design suffers from excessive complexity. This complexity not only increases manufacturing costs but also introduces multiple points of failure. The pneumatic drive and detection rod design makes it difficult to guarantee high-precision testing, and functional logic contradictions (such as spray interference testing) further reduce its practicality. Therefore, there is an urgent need to propose a low-cost testing device with certain versatility. Utility Model Content

[0003] The main purpose of this invention is to provide a universal paper feed roller assembly inspection device, which aims to solve the problems of low inspection efficiency and poor versatility of existing paper feed roller assemblies.

[0004] To achieve the above objectives, this utility model provides a universal paper feed roller assembly inspection device, wherein the device includes a base, an L-shaped slide rail, a scale, a limiting plate, and a limiting plate slide rail;

[0005] Two L-shaped slide rails are arranged in parallel on the base;

[0006] The base is also provided with two slidable slide rail brackets, which are located between two L-shaped slide rails. Each slide rail bracket has a magnet embedded on its inner side for adsorbing the metal shaft of the paper feed roller assembly to be tested.

[0007] A limiting plate slide is provided between the two slide rail brackets, and the limiting plate is slidably mounted on the limiting plate slide.

[0008] The scale passes through the clearance groove provided at the bottom of each slide rail bracket and is used to locate the position of the limiting plate on the limiting plate slide.

[0009] Optionally, the working surface of each limiting plate is an arc-shaped concave surface.

[0010] Optionally, the radius of curvature of the concave surface of each limiting plate is matched with the outer diameter of the paper feed roller assembly to be tested.

[0011] Optionally, the base is a rectangular plate structure with parallel guide rail grooves arranged on it.

[0012] Optionally, each slide rail bracket has a slider at its bottom that mates with the guide rail groove.

[0013] Optionally, each slide rail bracket is provided with an elongated hole for mounting the limiting plate slide rail.

[0014] Optionally, the clearance groove is an elongated through hole, the width of which forms a clearance fit with the thickness of the scale.

[0015] Optionally, the device further includes multiple fasteners, each fastener being disposed on an L-shaped slide rail, and the fasteners being used to press and fix the corresponding rubber wheel limiting plate.

[0016] Optionally, each fixing component is an eccentric cam locking mechanism.

[0017] Beneficial effects:

[0018] (1) The device of this application moves the inspection process forward, improving inspection efficiency. Specifically, it realizes an integrated operation mode of "assembly and inspection at the same time", completely eliminating the tedious cycle of "assembly-trial assembly-inspection-disassembly and rework" in the traditional way. During operation, the product only needs to be adsorbed and positioned and then gently pushed. The judgment can be made instantly by observing whether there is interference. The time for a single inspection is shortened from minutes to seconds, which greatly improves the production cycle.

[0019] (2) Using a ruler with precision graduations (minimum 0.1mm) for positioning, the installation dimensional tolerance of the limit plate can be strictly limited to within 1mm as required by the drawing, realizing a leap from "experience-based judgment" to "quantitative control". Furthermore, the metal shaft of the product under test is attracted by the magnet embedded in the slide rail bracket, providing a unified and precise positioning benchmark for each inspection, effectively eliminating operational errors that vary from person to person and from time to time. Additionally, the precise matching of the arc-shaped working surface of the limit plate with the product ensures accurate interference judgment and effectively prevents rework.

[0020] (3) By replacing the limiting plates with working surfaces of different radii of curvature and adjusting the spacing of the sliding rail brackets, one device can be adapted to multiple similar paper feed roller assemblies, avoiding the redundant investment of developing special inspection tools for each product. No extensive experience is required for operation; new employees can quickly get started, reducing reliance on individual employee experience and proficiency, and alleviating training pressure and management costs. The device has a simple and robust structure, with highly standardized main components, resulting in low maintenance and replacement costs. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0022] Figure 1 This is a schematic diagram of the structure of an embodiment of the universal paper feed roller assembly inspection device of this utility model;

[0023] Figure 2 for Figure 1 Exploded view of the assembly in the image;

[0024] Figure 3 for Figure 1 Detailed structural diagram of the slide rail bracket in the diagram;

[0025] Figure 4 A schematic diagram of the structure of L-shaped slide rail 3 (rear side) installed on base 4;

[0026] Figure 5 for Figure 4 A schematic diagram of the structure after installing one side slide rail bracket 8 on the foundation;

[0027] Figure 6 for Figure 5 A structural diagram showing the structure after installing scale 5 on the foundation;

[0028] Figure 7 for Figure 6 A schematic diagram of the structure on which the other side slide rail bracket 8 is installed;

[0029] Figure 8 for Figure 7 A schematic diagram of the structure with the limiting plate 2 and the limiting plate slide 6 installed on it;

[0030] Figure 9 for Figure 8 A structural diagram showing the installation of L-shaped slide rail 3 (front side) on the foundation;

[0031] Figure 10 for Figure 9 A schematic diagram of the structure with fastener 7 installed on the foundation;

[0032] Figure 11 for Figure 10 The diagram shows the structure after the product to be tested is placed into the limiting plate 2.

[0033] Explanation of icon numbers:

[0034] 1-Paper feed roller assembly, 2-Limiting plate, 3-L-shaped slide rail, 4-Base, 5-Scale, 6-Limiting plate slide rail, 7-Fixing component, 8-Slide rail bracket, a-Magnet, b-Mounting hole, c-Clearing groove.

[0035] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0036] It should be understood that the specific embodiments described herein are merely illustrative of the present invention and are not intended to limit the present invention.

[0037] See Figure 1-3 This utility model provides a universal paper feed roller assembly inspection device, wherein the device includes a base 4, an L-shaped slide rail 3, a scale 5, a limiting plate 2, and a limiting plate slide rail 6;

[0038] The base 4 is used for fixing and supporting the overall device. Preferably, the base 4 is made of rigid material and has mounting holes on its bottom surface for fixing to the workbench.

[0039] Furthermore, two L-shaped slide rails 3 are also arranged in parallel on the base 4. The two L-shaped slide rails 3 are symmetrically arranged and vertically installed on the base 4 to form an inspection reference plane. Preferably, a parallelism calibration structure is provided on the mounting surface of the L-shaped slide rail 3 and the base 4 to ensure that the parallelism error between the working surface of the slide rail and the plane of the base is ≤0.05mm. A scale line is provided on the vertical working surface to assist in coarse adjustment and positioning. A positioning pin hole can also be provided on the contact surface between the L-shaped slide rail 3 and the base 4 to ensure vertical installation.

[0040] Furthermore, the base 4 is also provided with two slidable slide rail supports 8, which are located between two L-shaped slide rails 3. Each slide rail support 8 has a magnet a embedded on its inner side for attracting the metal shaft of the paper feed roller assembly 1 to be tested. Preferably, the magnet a is a neodymium iron boron permanent magnet, whose attraction force meets the positioning requirements of the paper feed roller assembly and facilitates manual separation. The surface of the magnet a is provided with an anti-corrosion coating.

[0041] Furthermore, a limiting plate slide 6 is provided between the two slide rail supports 8, and the limiting plate 2 is slidably mounted on the limiting plate slide 6; the limiting plate 2 is preferably a rubber wheel limiting plate. The inner wall of the limiting plate slide 6 is polished to a friction coefficient of less than 0.01 to ensure smooth sliding of the limiting plate 2.

[0042] Furthermore, the scale 5 passes through the clearance groove c provided at the bottom of each slide rail bracket 8, and is used to position the limiting plate 2 on the limiting plate slide 6. The scale 5 is engraved with a precision of 0.1mm. The device sets the installation tolerance (≤1mm) using the scale, and judges the product qualification of the paper feed roller assembly under test by the interference between the paper feed roller assembly 1 and the limiting plate 2. Preferably, the scale 5 is made of stainless steel with laser engraving, and has an anti-detachment structure at the end to prevent accidental detachment from the slide rail.

[0043] Furthermore, the working surface of each limiting plate 2 is an arc-shaped concave surface. This facilitates the placement of the metal shaft of the paper feed roller assembly 1 to be tested on the arc-shaped concave surface; preferably, the radius of curvature of the arc-shaped concave surface of each limiting plate 2 matches the outer diameter of the paper feed roller assembly 1 to be tested, thereby forming an envelope-type contact inspection.

[0044] Furthermore, the base 4 is a rectangular plate structure with parallel guide rail grooves arranged on it.

[0045] Furthermore, each slide rail bracket 8 has a slider at its bottom that mates with the guide rail groove.

[0046] Furthermore, each slide rail bracket 8 is provided with an elongated oval mounting hole b for mounting the limiting plate slide rail 6, and allows the limiting plate 2 to be adjusted in the axial direction by ±2mm.

[0047] Furthermore, the clearance groove c is an elongated through hole, the width of which forms a clearance fit with the thickness of the adjustment scale 5. Preferably, the width of the clearance hole at the bottom of the slide rail bracket 8 is 0.1-0.2 mm larger than the thickness of the adjustment scale 5, forming a clearance fit.

[0048] Furthermore, the device also includes multiple fixing members 7, each fixing member 7 is disposed on the L-shaped slide rail 3, and the fixing member 7 is used to press and fix the corresponding rubber wheel limiting plate 2.

[0049] Preferably, each fixing component 7 is an eccentric cam locking mechanism. This eccentric cam locking design can be fixed by rotating 90°; after locking, it can withstand a thrust of more than 50N without displacement; and the surface is treated with anti-slip texture for easy operation by hand.

[0050] Furthermore, the device also includes multiple sets of replaceable limiting plates 2, each set of limiting plates corresponding to the inspection requirements of different models of paper feed roller assemblies. This enables the detection of different models of paper feed roller assemblies.

[0051] To better illustrate the structural design of this utility model, the following detailed installation steps are provided:

[0052] like Figure 4 As shown, after the base 4 is placed in a horizontal position, the L-shaped slide rail 3 (rear side) is installed on the base 4 and firmly fixed.

[0053] like Figure 5 As shown, place one side slide rail bracket 8 on the base 4 and fix it firmly.

[0054] like Figure 6 As shown, after placing the ruler 5 on the base 4, the ruler 5 passes through the clearance groove c of the slide rail bracket 8 and is pushed to the left into place.

[0055] like Figure 7 As shown, place the other slide rail bracket 8 on the base 4. This step does not require fixing.

[0056] like Figure 8 As shown, insert the limiting plate 2 into the limiting plate slide 6, then insert both ends of it into the mounting holes b of the slide rail bracket 8, and finally place it at both ends of the slide rail bracket 8, and firmly fix the other side of the slide rail bracket 8 onto the base 4.

[0057] like Figure 9 As shown, install the L-shaped slide rail 3 (front side) onto the base 4 and secure it firmly.

[0058] like Figure 10 As shown, install all the fasteners 7 onto the L-shaped slide rail 3. After adjusting the left and right positions of the limit plate 2 as required by the drawing, use the fasteners 7 to fix the limit plate 2. The equipment assembly is now complete and the equipment can be used normally.

[0059] like Figure 11 As shown, place the product to be tested onto the limiting plate 2, confirm the left / right reference plane according to the drawing requirements, and attract the iron rod of the product to be tested to the embedded magnet of the slide rail bracket 8 to make it the measurement reference point (the left reference point is used as an example in this case). After checking whether there is any interference between the product to be tested and the limiting plate 2, the quick test can be completed.

[0060] As can be seen, the universal paper feed roller assembly inspection device of this application can realize the "assembly and inspection simultaneously" step at the front end of the assembly process, avoiding the waste of labor resources caused by multiple reworks after trial assembly. This inspection device only requires adjusting the limit plate according to the drawing dimensions once before use, and then the product to be inspected can be directly and quickly inspected using the device, effectively solving the consistency problem and realizing the design concept of being both fast and convenient. It effectively ensures the accuracy control of the installation dimensions, making them meet the 1mm installation tolerance requirement of the drawing dimensions.

[0061] The above are merely preferred embodiments of this utility model and do not limit the patent scope of this utility model. Any equivalent structural transformations made based on the inventive concept of this utility model and the contents of this utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of this utility model.

Claims

1. A universal paper feed roller assembly inspection device, characterized in that, The device includes a base (4), an L-shaped slide rail (3), a scale (5), a limiting plate (2), and a limiting plate slide rail (6); Two L-shaped slide rails (3) are arranged in parallel on the base (4); The base (4) is also provided with two sliding rail brackets (8), which are located between two L-shaped rails (3). Each rail bracket (8) has a magnet (a) embedded on its inner side for adsorbing the metal shaft of the paper feed roller assembly (1) to be tested. A limiting plate slide (6) is provided between the two slide rail brackets (8), and the limiting plate (2) is slidably mounted on the limiting plate slide (6); The scale (5) passes through the clearance groove (c) provided at the bottom of each slide rail bracket (8) and is used to position the limiting plate (2) on the limiting plate slide (6).

2. The apparatus according to claim 1, characterized in that, The working surface of each limiting plate (2) is an arc-shaped concave surface.

3. The apparatus according to claim 2, characterized in that, The radius of curvature of the concave surface of each limiting plate (2) is matched with the outer diameter of the paper feed roller assembly (1) to be tested.

4. The apparatus according to claim 1, characterized in that, The base (4) is a rectangular plate structure with parallel guide rail grooves on it.

5. The apparatus as described in claim 4, characterized in that, Each slide rail bracket (8) has a slider at the bottom that mates with the guide rail groove.

6. The apparatus according to claim 1, characterized in that, Each slide rail bracket (8) is provided with an elongated hole (b) for installing the limiting plate slide rail (6).

7. The apparatus according to claim 1, characterized in that, The clearance groove (c) is a long strip-shaped through hole, and its width forms a clearance fit with the thickness of the scale (5).

8. The apparatus according to any one of claims 1 to 7, characterized in that, The device also includes multiple fasteners (7), each fastener (7) is set on the L-shaped slide rail (3), and the fasteners (7) are used to press and fix the corresponding rubber wheel limiting plate (2).

9. The apparatus according to claim 8, characterized in that, Each of the fixed parts (7) is an eccentric cam locking mechanism.

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