A paper shrinkage measuring device

Abstract

The utility model provides a paper expansion and contraction rate measuring device belongs to paper measurement technical field, this paper expansion and contraction rate measuring device includes movable chuck, measuring chuck, first fastening structure, extrusion structure, pointing structure, vertical setting's support structure, the installation through -hole of being set to the top of support structure, set up on the scale area of support structure, the connecting rod of middle part bushing in installation through -hole, the load block of bottom connection in the connecting rod top, and the first spring of bushing in the part of connecting rod between load block and installation through -hole. The utility model can use without external power supply, and the structure of this application is simple, convenient to carry, cost is lower, can use in constant temperature and humidity test chamber, can accurately measure the expansion and contraction rate of paper under different temperature and humidity conditions, provide more accurate quality control basis for printing industry, avoid the additional cost of traditional test equipment because of needing additional power supply and complex installation.

Description

Technical Field

[0001] This utility model relates to the field of paper measurement technology, specifically to a paper shrinkage rate measuring device. Background Technology

[0002] In the printing industry, the shrinkage rate of paper is a crucial factor affecting print quality, particularly impacting color registration accuracy and printing stability. The shrinkage rate of printing paper is influenced by environmental factors such as temperature and humidity, especially under conditions of high temperature and high humidity or low temperature and low humidity, where the paper's shrinkage characteristics can change significantly. Traditional paper shrinkage rate testing equipment requires an external power source and is heavy, complex in structure, and inconvenient to transport. It is typically used in temperature and humidity controlled laboratories and measures the paper's shrinkage rate by completely immersing the paper. Therefore, it cannot measure the shrinkage rate of paper under different temperature and humidity conditions. Utility Model Content

[0003] The purpose of this invention is to provide a paper stretching rate measuring device to address the shortcomings of the prior art.

[0004] This utility model proposes a paper stretchability measuring device, including a movable clamp, a measuring clamp, a first fastening structure, a pressing structure, a pointing structure, a vertically arranged support structure, a mounting through hole penetrating the top of the support structure, a scale area on the support structure, a connecting rod sleeved in the middle of the mounting through hole, a bearing block connected to the top of the connecting rod at its bottom, and a first spring sleeved on the connecting rod between the bearing block and the mounting through hole. The measuring clamp is fixedly connected to the bottom of the support structure. One end of the pointing structure is connected to the portion of the connecting rod between the mounting through hole and the movable clamp, and the other end points to the scale area. The top of the movable clamp is connected to the bottom of the connecting rod. The block is used to push the connecting rod downward and compress the first spring to a first compressed state when it is squeezed by the squeezing structure, so that the connecting rod drives the movable clamp to move downward to a first preset position. The first fastening structure is used to fix the movable clamp and the support structure together. The pointing structure points to the first preset scale of the scale area. The movable clamp and the measuring clamp are used to clamp the paper to be tested. The first spring is used to extend and push the carrying block upward when the carrying block is separated from the squeezing structure and when the first fastening structure and the movable clamp are separated, so that the connecting rod drives the movable clamp to pull the top of the paper to be tested upward and drives the pointing structure upward to point to the second preset scale of the scale area.

[0005] Furthermore, the extrusion structure is a weight.

[0006] Furthermore, it also includes a second spring, which is sleeved on the connecting rod between the mounting through hole and the movable chuck; the top of the second spring is connected to the support structure and the bottom is connected to the movable chuck; the second spring is used to extend to a first stretched state when the extrusion structure pushes the carrier block downward, and the second spring is used to shorten to a first initial state and drive the movable chuck upward when the extrusion structure and the carrier block separate.

[0007] Furthermore, it also includes multiple limiting plates connected to the top of the support block, and a first insertion groove formed by the support block and the multiple limiting plates. The extrusion structure includes an extrusion body and an insertion part connected to the bottom of the extrusion body. The insertion part is inserted into the first insertion groove, and the bottom of the extrusion body abuts against the top of the limiting plate.

[0008] Furthermore, the movable clamp includes a first connecting plate and two first clamping parts, one end of which is respectively connected to the bottom of the first connecting plate. The top of the first connecting plate is connected to the bottom of the connecting rod, and the other ends of the two first clamping parts are used to clamp the top of the paper to be tested.

[0009] Furthermore, the support structure includes a fixed rod, and the measuring clamp includes a second connecting plate and two second clamping parts, one end of which is respectively connected to the top of the second connecting plate. The bottom of the second connecting plate is connected to the top of the fixed rod, and the other ends of the two second clamping parts are used to clamp the bottom of the paper to be tested.

[0010] Furthermore, the support structure also includes a support frame, a receiving cavity disposed on the support frame, and a stop plate connected to one side of the support frame to stop one side of the receiving cavity. The mounting through hole is disposed through the top of the support frame and communicates with the receiving cavity. The scale area is disposed on the stop plate, and the fixing rod is connected to the bottom of the support frame.

[0011] Furthermore, the axes of the support frame, the connecting rod, the fixed rod, the receiving cavity, the movable chuck, and the measuring chuck are coincident.

[0012] Furthermore, the first connecting plate is detachably fixedly connected to the connecting rod, and the two first clamping parts are respectively hinged to the first connecting plate.

[0013] Furthermore, the second connecting plate is detachably fixedly connected to the fixing rod, and the two second clamping parts are respectively hinged to the second connecting plate.

[0014] The paper shrinkage rate measuring device of this utility model has the following beneficial effects: This application does not require an external power supply and has a simple structure, making it easy to transport and cost-effective. It can be used in constant temperature and humidity test chambers and can accurately measure the shrinkage rate of paper under different temperature and humidity conditions, providing the printing industry with more precise quality control data and avoiding the additional costs associated with traditional testing equipment that requires an external power supply and complex installation. Attached Figure Description

[0015] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the present invention and, together with the description, serve to explain the principles of the present invention. In these drawings, similar reference numerals are used to denote similar elements. The drawings described below are some embodiments of the present invention, but not all embodiments. Other drawings will be readily available to those skilled in the art based on these drawings without any inventive effort.

[0016] Figure 1 This is a cross-sectional view of the support structure in a paper stretching rate measuring device according to an embodiment of the present invention.

[0017] In the diagram: 1-Support structure, 11-Support frame, 12-Stop plate, 13-Fixing rod, 2-Modible clamp, 21-First connecting plate, 22-First clamping part, 3-Measuring clamp, 31-Second connecting plate, 32-Second clamping part, 4-Extrusion structure, 41-Extrusion body, 42-Insertion part, 51-Bearing block, 52-Connecting rod, 53-First spring, 54-Second spring, 55-Limiting plate, 6-Scale area, 7-Pointing structure. Detailed Implementation

[0018] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model. It should be noted that, unless otherwise specified, the embodiments and features in the embodiments of this application can be arbitrarily combined with each other.

[0019] Please see Figure 1This utility model discloses a paper stretchability measuring device, comprising a movable clamp 2, a measuring clamp 3, a first fastening structure, a pressing structure 4, a pointing structure 7, a vertically arranged support structure 1, a mounting through hole penetrating the top of the support structure 1, a scale area 6 on the support structure 1, a connecting rod 52 sleeved in the mounting through hole at its center, a bearing block 51 connected to the top of the connecting rod 52 at its bottom, and a first spring 53 sleeved on the connecting rod 52 between the bearing block 51 and the mounting through hole. The measuring clamp 3 is fixedly connected to the bottom of the support structure 1. One end of the pointing structure 7 is connected to the portion of the connecting rod 52 between the mounting through hole and the movable clamp 2, and the other end points to the scale area 6. The top of the movable clamp 2 is connected to the bottom of the connecting rod 52. The carrier block 51 is used to push the connecting rod 52 downward and compress the first spring 53 to a first compression state when it is squeezed by the squeezing structure 4, so that the connecting rod 52 drives the movable clamp 2 downward to a first preset position. The first fastening structure is used to fix the movable clamp 2 and the support structure 1. The pointing structure 7 points to the first preset scale of the scale area 6. The movable clamp 2 and the measuring clamp 3 are used to clamp the paper to be tested. The first spring 53 is used to extend and push the carrier block 51 upward when the carrier block 51 is separated from the squeezing structure 4 and when the first fastening structure and the movable clamp 2 are separated, so that the connecting rod 52 drives the movable clamp 2 to pull the top of the paper to be tested upward and drives the pointing structure 7 upward to point to the second preset scale of the scale area 6.

[0020] Here, the paper is placed in an initial temperature and humidity environment. Under these conditions, the paper absorbs moisture, causing a significant change in its physical properties, placing the paper in its first state. The paper is then cut into test pieces of a preset size, such as 150mm x 15mm. The cross-sectional area of ​​the first spring 53 is larger than the cross-sectional area of ​​the mounting hole but smaller than the cross-sectional area of ​​the support block 51. When the compression structure 4 is not placed on the support block 51, the first spring 53 is in its second initial state. The extrusion structure 4 is placed on top of the support block 51, causing the extrusion structure 4 to press the support block 51 downwards. The support block 51 drives the connecting rod 52 downwards, simultaneously compressing the first spring 53. The first spring 53 is then compressed to a first compression state. The connecting rod 52 drives the movable clamp 2 and the pointing structure 7 downwards, causing the movable clamp 2 to move to a first preset position. The movable clamp 2 and the support structure are then fixedly connected by the first fastening structure, thus fixing the movable clamp 2 in place. The pointing structure 7 moves to point to the first preset scale of the scale area 6. The paper to be tested is clamped by the movable clamp 2 and the measuring clamp 3. Then, the extrusion structure 4 is removed from the support block 51. Separating the support block 51 from the first fastening structure 2, the first fastening structure and the movable clamp 2 are separated, making the movable clamp 2 and the support structure 1 no longer fixedly connected. At this point, without the pressing action of the compression structure 4, the first spring 53 extends, pushing the support block 51 downwards. The support block 51 then drives the connecting rod 52 upwards, which in turn drives the pointing structure 7 and the movable clamp 2 upwards. When the first spring 53 extends to the third initial state, the movable clamp 2 moves to the second preset position, and the pointing structure 7 moves to the second preset scale of the scale area 6. The expansion and contraction value of the paper under initial temperature and humidity conditions can be calculated based on the first and second preset scales. This application can measure the expansion and contraction rate of paper under different temperature and humidity environments without requiring an external power supply. It is easy to transport and can be used in a constant temperature and humidity test chamber, thus effectively reducing costs and improving measurement accuracy and adaptability.

[0021] Specifically, current paper shrinkage measurement generally relies on a method of fully immersing the paper, which ignores the changes in paper shrinkage under different environmental conditions, especially in environments with varying temperature and humidity. This method cannot meet the needs of practical applications regarding changes in paper under different environments, resulting in an inability to accurately assess the shrinkage performance of paper in actual production environments. Most existing equipment requires power, and the testing environment places higher demands on equipment operation. Such equipment is typically not directly usable in constant temperature and humidity chambers, leading to additional installation and operational complexity, increasing cost and difficulty. This application is applicable to different environments: This application requires no external power supply and can be used in constant temperature and humidity chambers, accurately measuring the shrinkage of paper under different temperature and humidity conditions, providing a more precise quality control basis for the printing industry. Compared to existing paper shrinkage testing equipment, this application reduces costs: Due to the miniaturized design and lack of an external power supply, users can place it directly in a constant temperature and humidity chamber, avoiding the additional costs associated with traditional equipment requiring external power and complex installation.

[0022] The extrusion structure 4 can be a weight.

[0023] Specifically, the extrusion structure 4 can be a weight with a preset weight, which can be 200g.

[0024] As a paper stretching rate measuring device in this embodiment, it may also include a second spring 54, which is sleeved on the part of the connecting rod 52 located between the mounting through hole and the movable clamp 2; the top of the second spring 54 is connected to the support structure 1 and the bottom is connected to the movable clamp 2; the second spring 54 is used to extend to a first stretched state when the pressing structure 4 pushes the bearing block 51 to move downward, and the second spring 54 is used to shorten to a first initial state and drive the movable clamp 2 to move upward when the pressing structure 4 and the bearing block 51 separate.

[0025] Specifically, when the pressing structure 4 is not placed on the support block 51, the second spring 54 is in the fourth initial state. Placing the pressing structure 4 on top of the support block 51 causes it to press the support block 51 downwards. The support block 51 drives the connecting rod 52 downwards, which in turn drives the movable clamp 2 downwards. The movable clamp 2 then drives the bottom of the second spring 54 downwards. When the movable clamp 2 reaches the first preset position, the second spring 54 is in the first stretched state. Removing the pressing structure 4 from the support block 51 separates the pressing structure 4 from the support block 51, separating the first fastening structure from the movable clamp 2. This disconnects the movable clamp 2 from the support structure 1. Without the pressing action of the pressing structure 4, the second spring 54 contracts and drives the movable clamp 2 upwards. When the movable clamp 2 reaches the second preset position, the second spring 54 shortens to the first initial state. The pointing structure 7 can be a pointer, with one end connected to the part of the connecting rod 52 located between the mounting through hole and the movable clamp 2.

[0026] As a paper stretching rate measuring device in this embodiment, it may also include a plurality of limiting plates 55 connected to the top of the support block 51, and a first insertion groove formed by the support block 51 and the plurality of limiting plates 55. The extrusion structure 4 includes an extrusion body 41 and an insertion part 42 connected to the bottom of the extrusion body 41. The insertion part 42 is inserted into the first insertion groove, and the bottom of the extrusion body 41 abuts against the top of the limiting plate 55.

[0027] Specifically, the support block 51 is set horizontally, and multiple limiting plates 55 are vertically connected to the support block 51.

[0028] The movable clamp 2 may include a first connecting plate 21 and two first clamping parts 22, one end of which is connected to the bottom of the first connecting plate 21. The top of the first connecting plate 21 is connected to the bottom of the connecting rod 52, and the other end of the two first clamping parts 22 is used to clamp the top of the paper to be tested.

[0029] The support structure 1 may include a fixing rod 13, and the measuring clamp 3 includes a second connecting plate 31 and two second clamping parts 32 connected at one end to the top of the second connecting plate 31, the bottom of the second connecting plate 31 is connected to the top of the fixing rod 13, and the other end of the two second clamping parts 32 is used to clamp the bottom of the paper to be tested.

[0030] The support structure 1 may also include a support frame 11, a receiving cavity disposed on the support frame 11, and a stop plate 12 connected to one side of the support frame 11 to stop one side of the receiving cavity. A mounting through hole is disposed through the top of the support frame 11 and communicates with the receiving cavity. A scale area 6 is disposed on the stop plate 12. A fixing rod 13 is connected to the bottom of the support frame 11.

[0031] The axes of the support frame 11, the connecting rod 52, the fixed rod 13, the receiving cavity, the movable chuck 2, and the measuring chuck 3 can coincide.

[0032] The first connecting plate 21 is detachably fixed to the connecting rod 52, and the two first clamping parts 22 are respectively hinged to the first connecting plate 21.

[0033] Specifically, a first fixed through hole is provided through the stop plate 12. The first fixed through hole can be a strip-shaped through hole, and the axis of the first fixed through hole can be parallel to the axis of the connecting rod 52. A second fixed through hole is provided through the first connecting plate 21. The first fastening structure can include a first screw and a first nut. One end of the first screw passes through the second fixed through hole and the first fixed through hole in sequence and is screwed to the first nut. The other end of the first screw abuts against the first connecting plate 21, and the first nut abuts against the stop plate 12, thereby fixing the first connecting plate 21 and the stop plate 12 together, and realizing the fixed connection between the movable clamp 2 and the support structure 1. It also includes a second screw. The first connecting plate 21 is provided with a second insertion groove. The first connecting plate 21 is also provided with a first threaded through hole communicating with the second insertion groove. The connecting rod 52 is provided with a second threaded through hole. The bottom of the connecting rod 52 is inserted into the second insertion groove. One end of the second screw is screwed into the first threaded through hole and the second threaded through hole in sequence, thereby fixing the first connecting plate 21 and the connecting rod 52 together. This achieves a detachable fixed connection between the movable chuck 2 and the connecting rod 52. By separating the first screw from the second threaded through hole and the first threaded through hole respectively, the movable chuck 2 can be disassembled and replaced.

[0034] The second connecting plate 31 is detachably fixed to the fixing rod 13, and the two second clamping parts 32 are respectively hinged to the second connecting plate 31.

[0035] Specifically, it also includes a third screw, a third insertion slot in the second connecting plate 31, a third threaded through hole communicating with the third insertion slot, a fourth threaded through hole on the fixing rod 13, the top of the fixing rod 13 being inserted into the third insertion slot, and one end of the third screw being screwed into the third threaded through hole and the fourth threaded through hole in sequence, thereby fixing the second connecting plate 31 and the fixing rod 13 together, so as to detachably fix the measuring chuck 3 and the fixing rod 13 together. By separating the third screw from the fourth threaded through hole and the third threaded through hole respectively, the measuring chuck 3 can be disassembled and replaced.

[0036] Specifically, the bearing block 51 is set horizontally, the connecting rod 52 can be set vertically, and the pointing structure 7 can be set horizontally.

[0037] Specifically, this application is placed vertically, the first fastening structure is loosened, causing the movable clamp 2 and the support structure 1 to separate, and a preset weight of 200g is placed on the bearing block 51. At this time, the gravity provided by the weight causes the bearing block 51 to move downward, pressing the first spring 53 at the bottom, achieving a balance between gravity and spring force. The bearing block 51 pushes the connecting rod 52 downward, and the connecting rod 52 drives the movable clamp 2 and the pointing structure 7 downward respectively. After the movable clamp 2 and the support structure 1 are fixedly connected by the first fastening structure, the weight is removed, and the two ends of the paper to be tested are fixed in the movable clamp 2 and the measuring clamp 3 respectively. At this time, the pointing structure 7 points to the first preset scale of the scale area 6. At this time, the distance between the two clamps is a preset fixed value, slightly less than the length of the paper sample (e.g., 100mm); loosen the first fastening structure, so that the movable clamp 2 and the support structure 1 separate, the first spring 53 extends, and the first spring 53 pushes the bearing block 51 to move upward. The bearing block 51 drives the connecting rod 52 to move upward. The connecting rod 52 drives the movable clamp 2 and the pointing structure 7 to move upward respectively, thereby pulling the paper to be tested to a flat state, but without causing additional deformation to the paper. At this time, the pointing structure 7 points to the second preset scale of the scale area 6; calculate the expansion and contraction value of the paper to be tested under the initial temperature and humidity conditions according to the first preset scale and the second preset scale.

[0038] The above-described contents can be implemented individually or in combination in various ways, and all such variations are within the protection scope of this utility model.

[0039] It should be noted that in the description of this application, the terms "upper end," "lower end," and "bottom end," indicating orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this application is in use. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on this application. Moreover, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements, but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus. Unless otherwise limited, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes the element.

[0040] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A paper shrinkage measuring device characterized by: The device includes a movable chuck (2), a measuring chuck (3), a first fastening structure, a pressing structure (4), a pointing structure (7), a vertically arranged support structure (1), a through-hole for mounting on the top of the support structure (1), a scale area (6) on the support structure (1), a connecting rod (52) fitted into the through-hole in the middle, a bearing block (51) connected to the top of the connecting rod (52) at the bottom, and a first spring (53) fitted onto the connecting rod (52) between the bearing block (51) and the through-hole. The measuring chuck (3) is fixedly connected to the bottom of the support structure (1). One end of the pointing structure (7) is connected to the part of the connecting rod (52) between the through-hole and the movable chuck (2), and the other end points to the scale area (6). The top of the movable chuck (2) is connected to the bottom of the connecting rod (52). The bearing block (51) is used to... When it is squeezed by the squeezing structure (4), it pushes the connecting rod (52) to move downward and squeezes the first spring (53) to be in the first compression state, so that the connecting rod (52) drives the movable clamp (2) to move downward to the first preset position. The first fastening structure is used to fix the movable clamp (2) and the support structure (1) together. The pointing structure (7) points to the first preset scale of the scale area (6). The movable clamp (2) and the measuring clamp (3) are used to clamp the paper to be tested. The first spring (53) is used to extend and push the carrying block (51) to move upward when the carrying block (51) separates from the squeezing structure (4) and the first fastening structure separates from the movable clamp (2), so that the connecting rod (52) drives the movable clamp (2) to pull the top of the paper to be tested upward and drives the pointing structure (7) to move upward to the second preset scale of the scale area (6).

2. A paper stretch measurement device as claimed in claim 1, characterized in that: The extrusion structure (4) is a weight.

3. A paper shrinkage rate measuring device as described in claim 1 or 2, characterized in that: It also includes a second spring (54), which is sleeved on the part of the connecting rod (52) located between the mounting through hole and the movable chuck (2); the top of the second spring (54) is connected to the support structure (1) and the bottom is connected to the movable chuck (2); the second spring (54) is used to extend to a first stretched state when the extrusion structure (4) pushes the bearing block (51) downward, and the second spring (54) is used to shorten to a first initial state and drive the movable chuck (2) upward when the extrusion structure (4) and the bearing block (51) separate.

4. A paper stretch measurement device as claimed in claim 3, wherein: It also includes a plurality of limiting plates (55) connected to the top of the bearing block (51), and a first insertion groove formed by the bearing block (51) and the plurality of limiting plates (55). The extrusion structure (4) includes an extrusion body (41) and an insertion part (42) connected to the bottom of the extrusion body (41). The insertion part (42) is inserted into the first insertion groove, and the bottom of the extrusion body (41) abuts against the top of the limiting plate (55).

5. A paper stretch measurement device as claimed in claim 1 or 2, characterised in that: The movable clamp (2) includes a first connecting plate (21) and two first clamping parts (22) connected at one end to the bottom of the first connecting plate (21). The top of the first connecting plate (21) is connected to the bottom of the connecting rod (52), and the other end of the two first clamping parts (22) is used to clamp the top of the paper to be tested.

6. A paper stretch measurement device as claimed in claim 1 or 2, characterized in that: The support structure (1) includes a fixed rod (13), and the measuring clamp (3) includes a second connecting plate (31) and two second clamping parts (32) connected at one end to the top of the second connecting plate (31). The bottom of the second connecting plate (31) is connected to the top of the fixed rod (13), and the other end of the two second clamping parts (32) is used to clamp the bottom of the paper to be tested.

7. A paper stretch measurement device as claimed in claim 6, wherein: The support structure (1) further includes a support frame (11), a receiving cavity disposed on the support frame (11), and a stop plate (12) connected to one side of the support frame (11) to stop one side of the receiving cavity. The mounting through hole is disposed through the top of the support frame (11) and communicates with the receiving cavity. The scale area (6) is disposed on the stop plate (12). The fixing rod (13) is connected to the bottom of the support frame (11).

8. A paper stretch measurement device as claimed in claim 7, wherein: The axes of the support frame (11), the connecting rod (52), the fixed rod (13), the receiving cavity, the movable chuck (2), and the measuring chuck (3) are coincident.

9. A paper stretch measurement device as defined in claim 5, wherein: The first connecting plate (21) is detachably fixed to the connecting rod (52), and the two first clamping parts (22) are respectively hinged to the first connecting plate (21).

10. A paper stretch measurement device as defined in claim 6, wherein: The second connecting plate (31) is detachably fixed to the fixing rod (13), and the two second clamping parts (32) are respectively hinged to the second connecting plate (31).

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