Damper unit for paper roll, paper roll, and device for spreading paper sheet in paper roll into three-dimensional material

Abstract

The utility model discloses a damping unit for a paper roll, the paper roll and a device for unfolding a paper sheet in the paper roll into a three-dimensional material, the damping unit for the paper roll can be sleeved in a paper tube of the paper roll, the contact surface of the damping unit for the paper roll and the paper tube is a cambered convex surface, and the damping unit for the paper roll is arranged in a way that the paper tube is provided with a convex surface. When the paper roll rotates relative to the damping unit for the paper roll, the friction force applied to the paper tube of the paper roll by the damping unit for the paper roll can enable the actual tension when the paper roll is unfolded to be always kept in a theoretical tension range along with the change of the weight of the paper roll. The friction force applied to the paper tube of the paper roll by the damping unit for the paper roll can enable the actual tension to be always kept in a theoretical tension range along with the change of the weight of the paper roll when the paper roll is unfolded; in other words, the friction force applied to the paper tube of the paper roll can enable the tension change in the stretching process of the honeycomb paper blank in the paper roll to be small within the theoretical tension range, and therefore it can be guaranteed that paper sheets have the good unfolding effect under the condition that manual repeated adjustment is not needed.

Description

TECHNICAL FIELD

[0001] The utility model relates to packing equipment technical field, concretely relates to a damping unit for paper roll, paper roll and the device that paper sheet in paper roll is unfolded into stereoscopic material. BACKGROUND

[0002] When packing some fragile articles, the outer part is usually wrapped with shock-absorbing and cushioning materials such as paper pad, bubble film, foam and the like. Among them, honeycomb paper, as one of the paper pads, is widely used in packaging due to its convenient processing.

[0003] In the process of using honeycomb paper, the honeycomb paper blank in roll form is usually pulled out and unfolded to form honeycomb paper; then, the unfolded honeycomb paper (in some cases, the honeycomb paper is combined with kraft paper) is used to wrap and protect the articles.

[0004] In order to unfold the honeycomb paper blank into honeycomb paper, a tension within a theoretical tension range needs to be applied to the honeycomb paper blank on the paper roll. The honeycomb paper blank stretched by the tension within the theoretical tension range can be unfolded into honeycomb paper. If the tension applied to the paper roll is too large during the entire unfolding process, the honeycomb paper may be broken. If the tension applied to the paper roll is too small, the honeycomb paper cannot be evenly unfolded. In actual production, the theoretical tension range is generally determined through experiments.

[0005] Currently, there are two ways to stretch the honeycomb paper, i.e., manual stretching and electric stretching by machine.

[0006] However, the electric version of the machine has the problems of poor flexibility, limited use conditions and high price, and many scenarios do not have the conditions to use the electric machine.

[0007] The manual honeycomb paper box often causes the following problems in the process of stretching the honeycomb paper: the material cannot be unfolded as the roll diameter of the honeycomb paper blank decreases; or the friction needs to be constantly adjusted during use, resulting in low convenience and flexibility of the manual honeycomb paper box and poor unfolding effect. INVENTION CONTENTS

[0008] In order to solve at least one of the above problems, the inventor has conducted a large number of research experiments and found that if the change of the friction applied to the paper roll with the change of the weight of the paper roll can match the tension of the unfolding of the honeycomb paper blank, the honeycomb paper blank can be prevented from being broken while maintaining good unfolding effect. This is because when the honeycomb paper blank is stretched, the friction applied to the paper roll needs to be matched to keep the tension applied to the honeycomb paper blank within the theoretical tension range.

[0009] Therefore, according to one aspect of the utility model, a damping unit for paper roll is provided.

[0010] The damping unit for paper roll can be sleeved in the paper tube of the paper roll, and the contact surface of the damping unit for paper roll contacting the paper tube is a convex arc surface. The damping unit for paper roll is arranged to exert a friction force on the paper tube of the paper roll, so that the actual tension of the paper roll during unwinding can always be kept within the theoretical tension range with the change of the weight of the paper roll, and the radius of the paper roll also changes with the change of the weight of the paper roll when the paper tube of the paper roll is unchanged.

[0011] The damping unit for paper roll can exert a friction force on the paper tube of the paper roll, so that the actual tension of the paper roll during unwinding can always be kept within the theoretical tension range with the change of the weight of the paper roll, i.e. the friction force exerted on the paper tube of the paper roll also changes synchronously with the change of the weight of the paper roll, and the change of the tension F 张力 of the honeycomb paper blank during unwinding can be kept within a smaller range and always within the theoretical tension range, for example, between 20N and 30N. Thus, the paper sheet can be unwound well without manual adjustment. The damping unit for paper roll can be used not only in the manual honeycomb paper box, but also to solve the over-unwinding problem of the paper roll, such as the over-unwinding problem in the process of making the high-stability cushioning pad as claimed in the Chinese Utility Model No. CN220282265U, the over-unwinding problem in the process of making the cushioning pad with strong anti-deformation ability as claimed in the Chinese Utility Model No. CN220282264U, and the over-unwinding problem in the process of making the cushioning pad with strong tensile strength as claimed in the Chinese Utility Model No. CN220392032U.

[0012] In some embodiments, the damping unit for paper roll comprises a fixing plate for mounting on the box of the device for unwinding the paper sheet in the paper roll into a three-dimensional material; and a resistance element arranged on the fixing plate and configured to exert a friction force on the paper tube that decreases with the decrease of the weight of the paper roll.

[0013] Assuming that the condition of the paper tube is unchanged, the change of the designed friction force with the change of the weight of the paper roll can be calculated by the radius of the paper roll. Since the product of the friction force F 摩擦力 exerted on the paper roll and the radius r of the paper tube is equal to the tension F 张力 of the honeycomb paper blank during unwinding, and the radius r of the paper tube always remains unchanged, when the friction force F 摩擦力 exerted on the paper roll decreases with the decrease of the weight (the radius R of the paper roll) of the paper roll, the fluctuation of the tension F 张力 of the honeycomb paper blank during unwinding can be kept small. Thus, by adjusting the value of the friction force F 摩擦力 exerted on the paper roll, the tension F 张力The tension value is close to the theoretical tension value, so that the paper sheet has a good unfolding effect.

[0014] In some embodiments, the resistance member is arranged to exert a friction force on the paper tube under the action of the gravity of the paper roll, so that the resistance member can exert a variable friction force on the paper tube.

[0015] Thus, in the case that the gravity of the paper roll is large, the friction force exerted on the paper tube is mainly provided by the resistance member, and as the weight of the paper roll decreases (the radius of the paper roll decreases), the friction force exerted on the paper tube by the resistance member also decreases, so that the change of the friction force F 摩擦力 exerted on the paper roll can be matched with the change of the tension F 张力 of the honeycomb paper blank being unfolded as much as possible, so as to ensure the unfolding effect of the honeycomb paper when the honeycomb paper is unfolded.

[0016] In some embodiments, the resistance member is made of a material with a friction coefficient in the range of 0.3-1.5. Thus, the effect of the friction force generated by the resistance member on the paper tube can be ensured.

[0017] In some embodiments, on the basis that the damping unit for the paper roll includes a fixed plate and a resistance member, the damping unit for the paper roll further includes a resilient member and a pressing block; wherein the two ends of the resilient member away from each other are respectively abutted against the fixed plate and the pressing block, and the resistance member is arranged on the side of the resilient member away from the pressing block, so that when the damping unit for the paper roll is sleeved in the inner wall of the paper tube, and the two ends of the pressing block and the resistance member away from each other are abutted against the inner wall of the paper tube, the pressing block can be abutted against the inner wall of the paper tube under the action of the elastic force of the resilient member.

[0018] Assuming that the conditions of the paper tube remain unchanged, the change of the friction force designed according to the change of the weight of the paper roll can be calculated by the radius of the paper roll. The friction force F 摩擦力 exerted on the paper roll includes the friction force exerted on the paper roll by the resistance member and the friction force exerted on the paper roll by the pressing member; wherein the friction force exerted on the paper roll by the resistance member includes the product of the gravity G 纸卷 of the paper roll and the elastic coefficient μ 阻力件 of the resistance member, and further includes the product of the elastic force F 弹簧力 of the resilient member and the elastic coefficient μ 阻力件 of the resistance member; the friction force exerted on the paper roll by the pressing member includes the product of the elastic force F 弹簧力 of the resilient member and the elastic coefficient μ 压紧件 of the pressing member; wherein the gravity G 纸卷 of the paper roll includes the product of the volume of the paper roll and the density ρ 纸卷 and the gravitational acceleration g; the volume of the paper roll is the product of the difference between the square of the radius of the paper roll and the square of the radius of the paper tube and the circumference π and the width W 纸卷 of the paper roll; wherein π·W 纸卷 ·ρ纸卷 ·g is a constant, denoted as K; F 弹簧力 ·(μ 阻力件 +μ 压紧件 F is also a constant, let's take it as N. Therefore, F 摩擦力 =K·(R) 2 -r 2 )+N. And because F 摩擦力 The product of the radius r of the paper tube and the tensile force F of the unfolded honeycomb paper blank is equal to the tensile force F. 张力 The product of the radius R of the paper roll; therefore, F 张力 =[K·(R) 2 -r 2 )+N]·r / R=K`·R+N` / R, take K`=K·r, N`=(NK·r 2 )·r,F 张力 The functional relationship with the paper roll radius R is as follows: Figure 11 As shown, curve C represents the functional relationship between K`·R and R, curve B represents the functional relationship between N` / R and R, and curve A represents the functional relationship between K`·R+N` / R and R (i.e., F). 张力 (This is a functional relationship with the paper roll radius R), thus ensuring that the tension F of the honeycomb paper blank is maintained during unfolding. 张力 It exhibits relatively small fluctuations as the radius of the paper roll decreases.

[0019] In some embodiments, the clamping block is mounted on the fixed plate via a first moving mechanism. The first moving mechanism is configured to drive the clamping block to reciprocate along the center line connecting the clamping block and the resistance member. Because the clamping block can stably reciprocate along the center line connecting the clamping block and the resistance member under the action of the first moving mechanism, the damping unit for the paper roll can be separated from the paper tube when the first moving mechanism drives the clamping block towards the resistance member until at least one of the clamping block and the resistance member separates from the paper tube. This allows for the disassembly of the damping unit for the paper roll from the paper tube, enabling the replacement of the paper roll on the paper tube by replacing the paper tube, or the replacement or maintenance of the damping unit for the paper roll.

[0020] In some embodiments, positioning blocks are provided on the fixing plate and the clamping block to define the position of the elastic element. This reduces the possibility of partial scattering of the damping unit for the paper roll and improves the stability of the assembly structure of the damping unit for the paper roll.

[0021] In some embodiments, the clamping block is provided with a limiting block that restricts the distance between the clamping block and the resistance element. This ensures a more stable positional relationship between the clamping block and the resistance element, reducing the possibility of partial spillage of the damping unit for the paper roll.

[0022] In some implementations, the clamping block employs a friction coefficient μ 压紧块The material with a value range of 0.1-0.8 is used. Thus, the effect of the friction force generated by the pressing block on the paper tube can be ensured. Generally, μ 阻力件 greater than μ 压紧块 , so that, in general, F 摩擦力 is greater than the weight of the paper roll. 纸卷 , i.e. F 弹簧力 is greater than the weight of the paper roll. 阻力件 , i.e. F 摩擦力 tends to change as the weight of the paper roll changes.

[0023] According to another aspect of the present application, a paper roll is provided, which comprises a paper tube, a paper roll, and the aforementioned damping unit for paper roll; wherein the paper roll is wound on the outer periphery of the paper tube; at least one end of the paper tube is sleeved on the damping unit for paper roll, so that when the paper tube rotates relative to the damping unit for paper roll, the damping unit for paper roll can exert a friction force on the paper tube. The friction force exerted by the damping unit for paper roll on the paper tube is variable (for example, as the gravity of the paper roll decreases, the friction force exerted by the damping unit for paper roll on the paper tube decreases).

[0024] Thus, when the paper roll is used in a device for unwinding the paper sheets in the paper roll into a three-dimensional material, the damping unit for paper roll can be mounted on the box body of the device for unwinding the paper sheets in the paper roll into a three-dimensional material, so as to ensure that when the paper sheets in the paper roll are stretched, the paper tube of the paper roll can rotate relative to the damping unit for paper roll, so that the damping unit for paper roll exerts a friction force on the paper tube; since the friction force exerted by the damping unit for paper roll on the paper tube of the paper roll can keep the actual tension during unwinding of the paper roll within the range of the theoretical tension, i.e. as the radius (weight) of the paper roll changes, the friction force exerted on the paper tube of the paper roll also changes synchronously, and the changes of both can keep the tension F 张力 during unwinding of the honeycomb paper blank within a smaller range, so as to ensure that the paper sheets have a better unwinding effect without manual repeated adjustment.

[0025] In some embodiments, the two ends of the resistance piece and the pressing block of the damping unit for paper roll are respectively abutted against the inner wall of the paper tube, the side of the resistance piece facing the pressing block is abutted against the fixed plate, the end of the elastic piece of the damping unit for paper roll away from the resistance piece is abutted against the pressing block, and the end of the elastic piece away from the pressing block is abutted against the fixed plate; the pressing block exerts a compressive stress on the elastic piece in the direction of the center line of the resistance piece and the pressing block, so that the resistance piece can exert a friction force on the paper tube through the fixed plate, and the pressing block can exert a friction force on the paper tube. Thus, the elastic force of the elastic piece exerted on the pressing block and the gravity of the paper roll and the paper tube exerted on the resistance piece can make the resistance piece and the pressing block press the inner wall of the paper tube, so that the resistance piece and the pressing block exert a friction force on the paper tube when the paper sheets in the paper roll are stretched and the paper tube rotates relative to the resistance piece.

[0026] In some embodiments, the one end of the paper tube provided with the damping unit for paper roll is flush with the end surface of the paper roll, and the other end of the paper tube extends outside the paper roll. Thus, the one end of the paper tube not provided with the damping unit for paper roll is connected, for example, rotatably connected, with the second support of the device for unfolding the paper sheets in the paper roll into three-dimensional material.

[0027] In some embodiments, the fixing plate is provided with a first blocking part with a diameter larger than that of the paper tube, and the first blocking part is provided with a spigot part for non-rotatable spigoting with the box body of the device for unfolding the paper sheets in the paper roll into three-dimensional material. Thus, the fixing plate can be prevented from sliding into the tube of the paper tube; the first blocking part is non-rotatably connected with the box body through the spigot part, the detachable connection of the first blocking part with the box body can be achieved, and the operation is convenient.

[0028] According to another aspect of the present application, a device for unfolding paper sheets in a paper roll into three-dimensional material is provided, which comprises a box body and the aforementioned damping unit for paper roll; wherein the damping unit for paper roll is arranged on the box body and located in the accommodating cavity of the box body, and the position of the damping unit for paper roll arranged on the box body is arranged so as to enable the paper roll sleeved on the damping unit for paper roll to be arranged in suspension relative to the box body; the box body is provided with a paper outlet opening.

[0029] Thus, when the paper tube of the paper roll is sleeved on the damping unit for paper roll, the paper roll can drive the paper tube to rotate relative to the box body while the paper sheets in the paper roll are pulled out of the accommodating cavity of the box body from the paper outlet opening, and the paper tube can rotate relative to the damping unit for paper roll so that the damping unit for paper roll exerts friction force on the paper tube.

[0030] In some embodiments, the box body is further provided with a rotating connection structure for rotatably connecting with the one end of the paper tube not provided with the damping unit for paper roll. Thus, the stable installation of the paper tube on the box body can be ensured.

[0031] In some embodiments, the fixing plate of the damping unit for paper roll is fixedly arranged relative to the box body. Thus, the rotation of the paper tube relative to the damping unit for paper roll can be realized by rotating the paper roll and the paper tube relative to the box body, so that the damping unit for paper roll can exert friction force on the paper tube at this time.

[0032] In some embodiments, the box body comprises a box body proper, a first support and a second support; the damping unit for paper roll is arranged on the first support; the rotating connection structure is arranged on the second support; the first support and the second support are detachably arranged on the box body proper, and the first support and the second support are arranged so as to avoid the paper tube installed on the damping unit for paper roll and the second support from sliding off the second support and the damping unit for paper roll. Thus, the installation and dismounting of the paper tube on the box body are facilitated.

[0033] In some embodiments, the paper outlet opening is arranged in parallel with the central axis of the paper tube. This avoids the paper coming into contact with the box when it is being taken out.

[0034] In some embodiments, the resistance member of the paper roll damping unit is arranged above the pressing block of the paper roll damping unit. Thus, as mentioned above, the frictional force F 摩擦力 The frictional force exerted on the paper roll by the resistance member and the frictional force exerted on the paper roll by the pressing member, i.e. F 摩擦力 = K · (R 2 -r 2 ) + N, K = π · W 纸卷 · ρ 纸卷 · g; N = F 弹簧力 · (μ 阻力件 + μ 压紧件 ); the tension F 张力 = [K · (R 2 -r 2 ) + N] · r / R = K` · R + N` / R, K` = K · r, N` = (N - K · r 2 ) · r. Thus, the tension F 张力 has a smaller fluctuation value with the decrease of the radius (weight) of the paper roll, and when the paper sheet is being pulled out, the resistance member rubs against the inner wall of the paper tube to generate resistance, achieving the purpose of unfolding the paper sheet.

[0035] In some embodiments, the fixing plate of the paper roll damping unit is provided with a spigot for non-rotatable spigot connection with the box. Thus, the paper roll damping unit can be quickly and detachably connected with the box, and the connection and detachment process does not need to be assisted by tools, and the operation is convenient.

[0036] In some embodiments, the edge of the paper outlet opening is arranged to be smooth. Thus, the paper sheet in the paper roll can be prevented from being torn by the box during the pulling-out process, and at the same time the resistance can be reduced.

[0037] In some embodiments, the upper side of the paper outlet opening is provided with a turned-up edge turned upward and outward. Thus, the paper sheet in the paper roll can be prevented from being torn by the box during the pulling-out process, and at the same time the resistance can be reduced.

[0038] In some embodiments, the box is provided with a viewing port for connecting the accommodating cavity of the box with the outside, and part of the viewing port is aligned with the outer diameter of the paper tube of the paper roll. Thus, the use of the paper roll in the box can be observed at any time without having to open the box to confirm.

[0039] In some embodiments, the box is provided with a handle. This facilitates the carrying of the box.

[0040] In some embodiments, the device for unfolding paper sheets in a paper roll into a three-dimensional material further comprises a paper tube having one end wound on the damping unit for paper roll and the other end rotatably arranged on the box, and a paper roll wound on the outer periphery of the paper tube, the paper roll being a honeycomb paper blank. Thus, the honeycomb paper blank can be stretched to be unfolded into a honeycomb paper.

[0041] In some embodiments, a Sydney paper tube and a Sydney paper wound on the Sydney paper tube are hingedly arranged on the side of the damping unit for paper roll in the box facing the paper outlet opening, and the hinging shaft of the Sydney paper tube is parallel to the central shaft of the paper tube wound on the damping unit for paper roll. Thus, the Sydney paper can be pulled out while the paper sheets on the paper roll wound on the outer periphery of the paper tube wound on the damping unit for paper roll are stretched, so as to obtain double-layer wrapping paper.

[0042] In some embodiments, a stop structure for preventing the box placed on the table top from moving in the paper outlet direction is arranged on the box. Thus, the box can be prevented from moving when the paper sheets are pulled out from the box through the paper outlet opening, so as to ensure the unfolding effect of the paper sheets. BRIEF DESCRIPTION OF DRAWINGS

[0043] Figure 1 Structure diagram of the damping unit for paper roll in an embodiment of the present application;

[0044] Figure 2 Structure diagram of the damping unit for paper roll in another view shown in Fig. 1; Figure 1

[0045] Structure diagram of the damping unit for paper roll in another view shown in Fig. 1; Figure 3 Figure 2 Structure diagram of the damping unit for paper roll in another view shown in Fig. 1;

[0046] Figure 4 Figure 1 Structure diagram of the damping unit for paper roll in another view shown in Fig. 1;

[0047] Figure 5 Structure diagram of the damping unit for paper roll in another view shown in Fig. 1; Figure 1

[0048] Structure diagram of the damping unit for paper roll in another view shown in Fig. 1; Figure 6 Figure 5 Structure diagram of the damping unit for paper roll in another view shown in Fig. 1;

[0049] Figure 7 Structure diagram of the damping unit for paper roll in another view shown in Fig. 1;

[0050] Figure 8 Figure 7 Structure diagram of the damping unit for paper roll in another view shown in Fig. 1;

[0051] ​​​​Figure 9 Fig. 2 is a schematic view of a cross section of the paper roll along the direction B-B; Figure 8 Fig. 3 is a schematic view of an enlarged structure of the paper roll at C;

[0052] Figure 10 Fig. 4 is a schematic view of an enlarged structure of the paper roll at C; Figure 9 Fig. 5 is a schematic view of an enlarged structure of the paper roll at C;

[0053] Figure 11 Fig. 6 is a diagram of the change of the radius and tension of the paper roll of the present application;

[0054] Figure 12 Fig. 7 is a schematic view of the structure of the device for unfolding the paper sheet in the paper roll into a three-dimensional material according to an embodiment of the present application;

[0055] Figure 13 Fig. 8 is a schematic view of the structure of the device for unfolding the paper sheet in the paper roll into a three-dimensional material according to another embodiment of the present application; Figure 12 Fig. 9 is a schematic view of the structure of the device for unfolding the paper sheet in the paper roll into a three-dimensional material according to another embodiment of the present application; Fig. 10 is a schematic view of the structure of the device for unfolding the paper sheet in the paper roll into a three-dimensional material according to another embodiment of the present application;

[0056] Fig. 11 is a schematic view of the structure of the device for unfolding the paper sheet in the paper roll into a three-dimensional material according to another embodiment of the present application; Figure 14 Fig. 12 is a schematic view of the structure of the device for unfolding the paper sheet in the paper roll into a three-dimensional material according to another embodiment of the present application; Figure 12 Fig. 13 is a schematic view of the structure of the device for unfolding the paper sheet in the paper roll into a three-dimensional material according to another embodiment of the present application; Fig. 14 is a schematic view of the structure of the device for unfolding the paper sheet in the paper roll into a three-dimensional material according to another embodiment of the present application;

[0057] Fig. 15 is a schematic view of the structure of the device for unfolding the paper sheet in the paper roll into a three-dimensional material according to another embodiment of the present application; Figure 15 Fig. 16 is a schematic view of the structure of the device for unfolding the paper sheet in the paper roll into a three-dimensional material according to another embodiment of the present application; Figure 14 Fig. 17 is a schematic view of the structure of the device for unfolding the paper sheet in the paper roll into a three-dimensional material according to another embodiment of the present application; Fig. 18 is a schematic view of the structure of the device for unfolding the paper sheet in the paper roll into a three-dimensional material according to another embodiment of the present application;

[0058] Fig. 19 is a schematic view of the structure of the device for unfolding the paper sheet in the paper roll into a three-dimensional material according to another embodiment of the present application; Figure 16 Fig. 20 is a schematic view of the structure of the device for unfolding the paper sheet in the paper roll into a three-dimensional material according to another embodiment of the present application; Figure 15 Fig. 21 is a schematic view of the structure of the device for unfolding the paper sheet in the paper roll into a three-dimensional material according to another embodiment of the present application; Fig. 22 is a schematic view of the structure of the device for unfolding the paper sheet in the paper roll into a three-dimensional material according to another embodiment of the present application;

[0059] Fig. 23 is a schematic view of the structure of the device for unfolding the paper sheet in the paper roll into a three-dimensional material according to another embodiment of the present application; Figure 17 Fig. 24 is a schematic view of the structure of the device for unfolding the paper sheet in the paper roll into a three-dimensional material according to another embodiment of the present application; Figure 14 Fig. 25 is a schematic view of the structure of the device for unfolding the paper sheet in the paper roll into a three-dimensional material according to another embodiment of the present application; Fig. 26 is a schematic view of the structure of the device for unfolding the paper sheet in the paper roll into a three-dimensional material according to another embodiment of the present application;

[0060] Fig. 27 is a schematic view of the structure of the device for unfolding the paper sheet in the paper roll into a three-dimensional material according to another embodiment of the present application; Figure 18 Fig. 28 is a schematic view of the structure of the device for unfolding the paper sheet in the paper roll into a three-dimensional material according to another embodiment of the present application; Fig. 29 is a schematic view of the structure of the device for unfolding the paper sheet in the paper roll into a three-dimensional material according to another embodiment of the present application;

[0061] Fig. 30 is a schematic view of the structure of the device for unfolding the paper sheet in the paper roll into a three-dimensional material according to another embodiment of the present application; Figure 19 Fig. 31 is a schematic view of the structure of the device for unfolding the paper sheet in the paper roll into a three-dimensional material according to another embodiment of the present application; Figure 18 Fig. 32 is a schematic view of the structure of the device for unfolding the paper sheet in the paper roll into a three-dimensional material according to another embodiment of the present application; Fig. 33 is a schematic view of the structure of the device for unfolding the paper sheet in the paper roll into a three-dimensional material according to another embodiment of the present application;

[0062] Fig. 34 is a schematic view of the structure of the device for unfolding the paper sheet in the paper roll into a three-dimensional material according to another embodiment of the present application; Figure 20 Fig. 35 is a schematic view of the structure of the device for unfolding the paper sheet in the paper roll into a three-dimensional material according to another embodiment of the present application; Fig. 36 is a schematic view of the structure of the device for unfolding the paper sheet in the paper roll into a three-dimensional material according to another embodiment of the present application;

[0063] Fig. 37 is a schematic view of the structure of the device for unfolding the paper sheet in the paper roll into a three-dimensional material according to another embodiment of the present application; Figure 21 Fig. 38 is a schematic view of the structure of the device for unfolding the paper sheet in the paper roll into a three-dimensional material according to another embodiment of the present application; Figure 20A cross-sectional structure schematic diagram of a device for unfolding paper sheets in a paper roll into a three-dimensional material is shown;

[0064] Label: 20, damping unit for paper roll; 21, fixed plate; 211, first sliding groove; 212, positioning block; 213, arc-shaped groove; 214, first blocking part; 215, second blocking part; 216, plug-in part; 217, first through hole; 218, second through hole; 219, third through hole; 22, resistance piece; 23, elastic piece; 24, pressing block; 241, first sliding block; 31, paper tube; 32, paper roll; 321, paper sheet; 40, box body; 401, accommodating cavity; 402, handle; 41, box body; 411, paper outlet opening; 412, flange; 413, observation opening; 42, first support; 421, plug-in hole; 43, second support; 431, rotary connection structure; 51, Sydney paper tube; 52, Sydney paper; 60, stop structure; 61, first blocking part; 62, second blocking part; 70, table top. DETAILED DESCRIPTION

[0065] It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other without conflict.

[0066] It should also be noted that, in this document, the relationship terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply that there is any such actual relationship or order between the entities or operations. Moreover, the terms "include", "contain", not only include those elements, but also include other elements not explicitly listed, or include elements inherent to the process, method, article or device. Without more limitations, the elements defined by the statement "include" do not exclude the presence of other identical elements in the process, method, article or device including the described elements. The terms used in this document are generally the terms commonly used by those skilled in the art, and if they are inconsistent with the commonly used terms, the terms in this document shall prevail.

[0067] Moreover, for the convenience of description, spatial relative terms such as "under", "below", "lower", "above", "upper" and the like can be used herein to describe the relationship of one element or component to another (or another) element or component as shown in the figure. In addition to the orientation shown in the figure, the spatial relative terms are intended to include different orientations of the device in use or operation. The device can be oriented in other ways (rotated 90 degrees or in other orientations), and the spatial relative descriptors used herein can be interpreted accordingly.

[0068] In order to make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme of the embodiments of the present application will be described clearly and completely below in conjunction with the drawings of the embodiments of the present application. Obviously, the described embodiments are some but not all of the embodiments of the present application. Based on the embodiments of the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort belong to the scope of the present application.

[0069] Figures 1 to 6 A damping unit 20 for a paper roll according to an embodiment of the present application is schematically shown.

[0070] As shown in Figure 1 and Figure 3 , the damping unit 20 for the paper roll comprises a fixing plate 21, a resistance piece 22, an elastic piece 23 and a pressing block 24; the resistance piece 22 and the elastic piece 23 are installed on the fixing plate 21; the pressing block 24 is arranged on the side of the elastic piece 23 away from the resistance piece 22; the resistance piece 22, the elastic piece 23 and the pressing block 24 are arranged such that, when the damping unit 20 for the paper roll is sleeved in the inner diameter of the paper tube 31, the pressing block 24 abuts against the inner wall of the paper tube 31 under the action of the elastic piece 23, the resistance piece 22 abuts against the inner wall of the paper tube 31 under the action of the gravity of the paper roll, and the elastic force of the elastic piece 23 acts on the resistance piece 22 via the fixing plate 21. Specifically, the two ends of the elastic piece 23 away from each other abut against the fixing plate 21 and the pressing block 24 respectively, and the resistance piece 22 is arranged on the side of the elastic piece 23 away from the pressing block 24, so that the resistance piece 22 and the pressing block 24 can abut against the inner wall of the paper tube 31; the resistance piece 22 and the pressing block 24 are arranged such that, when they abut against the inner wall of the paper tube 31, they can generate a friction force; the resistance piece 22 and the pressing block 24 are made of a material capable of generating a friction force by pressure; wherein the friction force exerted by the resistance piece on the paper roll comprises the product of the gravity G 纸卷 of the paper roll and the elastic coefficient μ 阻力件 of the resistance piece, and also comprises the product of the elastic force F 弹簧力 of the elastic piece and the elastic coefficient μ 阻力件 of the resistance piece; the friction force exerted by the pressing block on the paper roll comprises the product of the elastic force F 弹簧力 of the elastic piece and the elastic coefficient μ 压紧件 of the pressing block.

[0071] Preferably, the resistance member 22 is made of a material with a friction coefficient ranging from 0.3 to 1.5, such as polyurethane, leather, synthetic rubber, etc. More preferably, the resistance member 22 is made of a material with a friction coefficient ranging from 0.5 to 0.8. Preferably, the pressing block 24 is made of a material with a friction coefficient ranging from 0.1 to 0.8, and has high wear resistance and toughness, and low brittleness, such as nylon, ABS (acrylonitrile-butadiene-styrene copolymer), pom (polyoxymethylene), pc (polycarbonate), etc. More preferably, the pressing block 24 is made of a material with a friction coefficient ranging from 0.3 to 0.4. In some embodiments, the damping unit for paper roll is configured such that the friction force applied to the paper tube 31 of the paper roll can keep the actual tension of the paper roll within the range of the theoretical tension as the weight of the paper roll (when the condition of the paper tube 31 is unchanged, i.e. the radius of the paper roll 32) changes. Thus, the paper sheet can be well expanded without manual adjustment.

[0072] In some embodiments, the resistance member 22 is configured to apply a friction force to the paper tube 31 under the action of the gravity of the paper roll, so that the resistance member 22 can apply a variable friction force to the paper tube 31.

[0073] Assuming that the condition of the paper tube 31 is unchanged, the change of the friction force designed according to the change of the weight of the paper roll can be calculated by the radius of the paper roll. When using the damping unit for paper roll 20, the paper tube 31 of the paper roll is arranged outside the resistance member 22 and the pressing block 24, and the fixed plate 21 is fixedly installed on the box 40 of the device for expanding the paper sheet in the paper roll into a three-dimensional material, and the resistance member 22 is located above the pressing block 24. When the paper sheet 321 in the paper roll 32 on the paper tube 31 of the paper roll is stretched, the paper tube 31 will rotate around its own central axis relative to the box 40, so that the paper tube 31 rotates relative to the resistance member 22 and the pressing block 24, and the resistance member 22 and the pressing block 24 will generate a friction force F 摩擦力 = K · (R 2 -r 2 ) + N, K = π · W 纸卷 · ρ 纸卷 · g; N = F 弹簧力 · (μ 阻力件 + μ 压紧件 ); thus, the friction force applied to the paper tube 31 decreases as the radius (weight) of the paper roll decreases, so that the device can have a stable stretching effect on the paper sheet of the paper roll 32, and the friction force does not need to be repeatedly adjusted during operation of the device, and the operation is convenient.

[0074] In some preferred embodiments, as Figure 3 and Figure 5As shown, the outer periphery of the resistance element 22 is abutted against the inner wall of the paper tube 31 under the action of the elastic force applied to the fixing plate 21 by the elastic element 23. In some specific embodiments, as shown in Figure 1 , Figure 5 and Figure 6 shown, the fixing plate 21 is integrally formed or processed with an arc-shaped groove 213 adapted to the outer periphery of the resistance element 22, and a first blocking portion 214 and a second blocking portion 215 are respectively arranged at the two ends of the arc-shaped groove 213 to avoid the resistance element 22 from sliding out of the arc-shaped groove 213, thereby ensuring the stability of the resistance element 22 arranged on the fixing plate 21.

[0075] In some preferred embodiments, as shown in Figure 3 , the fixing plate 21 is integrally formed or processed with a first sliding groove 211 arranged along the line direction of the resistance element 22 and the compression block 24; and the compression block 24 is integrally formed, processed or connected with a first sliding block 241 adapted to the first sliding groove 211. Through the mutual adaptation of the first sliding groove 211 and the first sliding block 241, the trajectory of the compression block 24 relative to the fixing plate 21 under the action of the elastic force of the elastic element 23 is limited, i.e., the first sliding groove 211 and the first sliding block 241 constitute a first moving mechanism in an embodiment, which can drive the compression block 24 to reciprocate relative to the fixing plate 21 along the line direction of the compression block 24 and the resistance element 22, thereby limiting the movement path of the compression block 24 relative to the fixing plate 21 and the resistance element 22, and ensuring the stability of the movement of the compression block 24 relative to the fixing plate 21 and the resistance element 22. Preferably, as shown in Figure 3 , the compression block 24 is provided with a limiting block for limiting the distance of the compression block 24 away from the resistance element 22. In some specific embodiments, the limiting block is integrally formed, processed or connected on the side of the first sliding block 241 away from the compression block 24 and the first sliding groove 211. In this way, the positional relationship between the compression block 24 and the resistance element 22 can be more stably ensured, and the possibility of partial scattering of the paper roll damping unit 20 can be reduced.

[0076] In some preferred embodiments, as shown in Figure 1 , Figure 3 , Figure 5 and Figure 6 , the elastic element 23 is a compression spring or rubber. Preferably, as shown in Figure 3 , the fixing plate 21 and the compression block 24 are provided with a positioning block 212 for limiting the position of the elastic element 23. In some specific embodiments, the positioning block 212 is a protrusion integrally formed, processed or connected on the fixing plate 21 and the compression block 24. In this way, the possibility of partial scattering of the paper roll damping unit 20 can be reduced, and the stability of the assembly structure of the paper roll damping unit 20 can be improved.

[0077] In some preferred embodiments, as shown in Figure 3As shown, the fixing plate 21 is integrally formed or processed with a through hole to reduce the weight of the fixing plate 21.

[0078] In some preferred embodiments, as shown in Figure 3 As shown, the pressing block 24 is integrally formed or processed with a counterbore to reduce the weight of the pressing block 24.

[0079] In some preferred embodiments, as shown in Figure 4 As shown, the fixing plate 21 is integrally formed or processed with at least one of a first through hole 217, a second through hole 218 and a third through hole 219; the first through hole 217 is aligned with the setting position of the pressing block 24; the second through hole 218 is aligned with the setting position of the elastic member 23; and the third through hole 219 is aligned with the setting position of the resistance member, so as to facilitate the calibration of the position of the fixing plate 21 and the processing of the mold.

[0080] In some preferred embodiments, as shown in Figure 1 and Figure 3 As shown, the resistance member 22 is in a cylindrical shape.

[0081] In some preferred embodiments, as shown in Figure 1 and Figure 3 As shown, the resistance member 22 is snap-connected to the fixing plate 21.

[0082] Figures 7 to 10 A paper roll according to an embodiment of the present application is schematically shown.

[0083] As shown in Figures 8 to 10As shown, the paper roll comprises a paper tube 31, a roll paper 32 and the aforementioned damping unit for paper roll 20; wherein the roll paper 32 is wound on the outer periphery of the paper tube 31; at least one end of the paper tube 31 is sleeved on the damping unit for paper roll 20, so that the damping unit for paper roll 20 applies variable friction force to the paper tube 31 when the paper tube 31 rotates relative to the damping unit for paper roll 20. In some embodiments, the fixed plate 21 of the damping unit for paper roll 20 is used to be mounted on the box body 40; the two ends of the resistance piece 22 and the pressing block 24 of the damping unit for paper roll 20, which are away from each other, are respectively abutted against the inner wall of the paper tube 31; the side of the resistance piece 22, which faces the pressing block 24, is abutted against the fixed plate 21; the end of the elastic piece 23 of the damping unit for paper roll 20, which is away from the resistance piece 22, is abutted against the pressing block 24; the end of the elastic piece 23, which is away from the pressing block 24, is abutted against the fixed plate 21; the pressing block 24 applies compressive stress to the elastic piece 23 in the direction of the connecting line of the resistance piece 22 and the pressing block 24, so that the pressing block 24 can apply friction force to the paper tube 31, and the resistance piece 22 can apply friction force to the paper tube 31 under the action of the gravity of the paper roll. Thus, when the paper roll is used in the device for unfolding the paper sheets in the paper roll into three-dimensional material, the damping unit for paper roll 20 can be mounted on the box body 40 of the device for unfolding the paper sheets in the paper roll into three-dimensional material; the elastic force of the elastic piece 23 applied on the fixed plate 21 and the pressing block 24 can make the pressing block 24 press the inner wall of the paper tube 31; at the same time, the gravity of the paper roll applied on the resistance piece 22 can realize that the resistance piece 22 and the pressing block 24 apply variable friction force to the paper tube 31 when the paper sheet 321 in the paper roll is stretched and the paper tube 31 rotates relative to the resistance piece 22.

[0084] In some preferred embodiments, as shown in Figure 8 the contact surface of the resistance piece 22 with the paper tube 31 is a convex arc surface, so as to reduce the abrasion of the resistance piece 22 to the inner wall of the paper tube 31 when the paper tube 31 rotates relative to the resistance piece 22. In some preferred embodiments, as shown in Figure 8 the contact surface of the pressing block 24 with the paper tube 31 is a convex arc surface, so as to reduce the abrasion of the pressing block 24 to the inner wall of the paper tube 31 when the paper tube 31 rotates relative to the pressing block 24. Thus, the contact surface of the damping unit for paper roll 20 with the paper tube 31 is a convex arc surface.

[0085] In some preferred embodiments, as shown in Figure 9 the end of the paper tube 31, on which the damping unit for paper roll 20 is arranged, is flush with the end surface of the roll paper 32, and the other end of the paper tube 31 extends out of the outer side of the roll paper 32. Thus, the end of the paper tube 31, on which the damping unit for paper roll 20 is not arranged, can be connected, for example, rotatably connected, with the second support 43 of the device for unfolding the paper sheets in the paper roll into three-dimensional material.

[0086] In some preferred embodiments, as shown in Figure 10As shown, the fixing plate 21 is provided with a first blocking part 214 whose diameter is larger than that of the paper tube 31. The first blocking part 214 is provided with a plug-in part 216 for non-rotatably inserting into the box body 40. This prevents the fixing plate 21 from sliding into the paper tube 31. The first blocking part 214 is non-rotatably connected to the box body 40 through the plug-in part 216, which allows for a detachable connection between the first blocking part 214 and the box body 40, and is easy to operate.

[0087] Figures 12 to 17 The diagram schematically illustrates an apparatus for unfolding paper sheets from a paper roll into a three-dimensional material according to one embodiment of the present invention.

[0088] like Figure 12 As shown, the device for unfolding paper sheets from a paper roll into a three-dimensional material includes a housing 40 and the aforementioned paper roll damping unit 20; wherein, the paper roll damping unit 20 is disposed on the housing 40 and located in the receiving cavity 401 of the housing 40, and the position of the paper roll damping unit 20 on the housing 40 is arranged such that the rolled paper 32 on the paper tube 31 sleeved on the paper roll damping unit 20 is suspended relative to the housing 40; the housing 40 is provided with a paper outlet opening 411. Thus, when the paper tube 31 of the paper roll is sleeved on the paper roll damping unit 20 (e.g., when the paper tube 31 of the paper roll is sleeved on the paper roll damping unit 20, as shown in the image, the paper roll 32 is suspended relative to the housing 40; the housing 40 is provided with a paper outlet opening 411. Figure 14 As shown, when the paper roll 321 is pulled out of the receiving cavity 401 of the box 40 from the paper outlet 411, the paper roll 32 can drive the paper tube 31 to rotate relative to the box 40, and at the same time the paper tube 31 can rotate relative to the paper roll damping unit 20, so that the paper roll damping unit 20 applies a variable frictional force to the paper tube 31.

[0089] In some embodiments, the housing 40 is further provided with a rotating connection structure 431 for rotatably connecting to one end of the paper tube 31 that is not provided with the paper roll damping unit 20. In some specific embodiments, such as Figure 13 As shown, the rotating connection structure 431 is implemented as a first mounting hole machined or integrally formed on the box body 40, in which the paper tube 31 is fitted into the first mounting hole, thereby realizing the rotatable connection between the paper tube 31 and the box body 40.

[0090] In some preferred embodiments, such as Figure 12As shown, the box 40 comprises a box body 41, a first support 42 and a second support 43; the damping unit 20 for paper roll is arranged on the first support 42, for example, the fixing plate 21 of the damping unit 20 for paper roll is mounted on the first support 42; the rotating connection structure 431 is arranged on the second support 43; the first support 42 and the second support 43 are detachably arranged on the box body 41, and the first support 42 and the second support 43 are arranged to avoid the paper tube 31 mounted on the damping unit 20 for paper roll and the second support 43 from sliding off the second support 43 and the damping unit 20 for paper roll, for example, the first support 42 and the second support 43 are arranged such that when the first support 42 and the second support 43 are mounted in the box body 41, the first support 42 and the second support 43 can clamp the paper tube 31 therebetween, and can also clamp the damping unit 20 for paper roll between one of the first support 42 and the second support 43 and the paper tube 31, specifically, for example, the surfaces of the first support 42 and the second support 43 away from each other are respectively abutted against the inner wall of the accommodating cavity 401 of the box 40. Since the first support 42 and the second support 43 can be detached from the box 40, when the first support 42 and the second support 43 are detached from the box 40, the distance between the first support 42 and the second support 43 is no longer constant, and the first support 42 and the second support 43 no longer clamp the paper tube 31 therebetween, so as to facilitate the installation and detachment of the paper tube 31 on the box 40. In some specific embodiments, as shown in Figure 13 and Figure 15 As shown, the first mounting hole is integrally formed or machined on the second support 43.

[0091] In some preferred embodiments, as shown in Figure 13 and Figure 14 As shown, the paper outlet opening 411 is arranged in parallel with the central axis of the paper tube 31 to avoid the paper from contacting the box 40 when the paper is discharged.

[0092] In some preferred embodiments, as shown in Figure 12 As shown, the resistance element 22 of the damping unit 20 for paper roll is located above the pressing block 24 of the damping unit 20 for paper roll. Thus, the friction force exerted by the resistance element 22 on the paper tube 31 is the friction force [(G 纸卷 +F 弹簧力 )·μ 阻力件 ] exerted by the resistance element 22 on the paper tube 31 under the action of the gravity of the paper roll and the elastic force of the elastic element 23; at the same time, the friction force exerted by the pressing block 24 on the paper tube 31 is the friction force (F 弹簧力 ·μ 压紧件 ) exerted by the pressing block 24 on the paper tube 31 under the action of the elastic force of the elastic element 23, when the paper sheet 321 of the paper roll 32 is pulled, the resistance element 22 and the pressing block 24 generate resistance by friction with the inner wall of the paper tube 31, so as to achieve the purpose of unfolding the paper sheet 321.

[0093] In some preferred embodiments, as shown in Figure 16 The damping unit 20 for paper roll is non-rotatably connected with the box 40, so that the friction of the damping unit 20 for paper roll can stably act on the paper tube 31. Preferably, the damping unit 20 for paper roll is detachably connected with the box 40. In some specific embodiments, as shown in Figure 16 The fixing plate 21 of the damping unit 20 for paper roll is provided with a plug-in part 216 for non-rotatable plug-in with the box 40, and the box 40 is provided with a plug-in hole 421 matched with the plug-in part 216, which is arranged on the first support 42, for example. Thus, the damping unit 20 for paper roll can be quickly and detachably connected with the box 40, and the connection and disconnection process does not need to be assisted by tools, and the operation is convenient.

[0094] In some preferred embodiments, the edge of the paper outlet 411 is smoothly arranged. Thus, the paper sheet 321 in the roll paper 32 can be prevented from being torn by the box 40 during the drawing process, and the resistance can be reduced.

[0095] In some preferred embodiments, as shown in Figure 13 , Figure 14 and Figure 17 The upper side of the paper outlet 411 is provided with a turned-up edge 412 turned up and outward. Thus, the paper sheet 321 in the roll paper 32 can be prevented from being torn by the box 40 during the drawing process, and the resistance can be reduced.

[0096] In some preferred embodiments, as shown in Figure 13 and Figure 14 The box 40 is provided with an observation hole 413 for connecting the accommodating cavity 401 of the box 40 with the outside, and part of the observation hole 413 is aligned with the outer diameter of the paper tube 31 of the paper roll. Thus, the use of the roll paper 32 in the box 40 can be observed at any time without having to open the box to confirm.

[0097] In some preferred embodiments, as shown in Figure 13 and Figure 17 The box 40 is provided with a handle 402. In some specific embodiments, as shown in Figure 13 and Figure 17 The handle 402 is an integral molding or a counterbore or a through hole processed on the box 40, so as to facilitate the carrying of the box 40.

[0098] In some embodiments, as shown in Figure 15 and Figure 16 The device for unfolding the paper sheet in the paper roll into a three-dimensional material further comprises a paper tube 31 having one end wound on the damping unit 20 for paper roll and the other end rotatably arranged on the box 40, and a roll paper 32 wound on the outer periphery of the paper tube 31, and the roll paper 32 is a honeycomb paper blank. Thus, the honeycomb paper blank can be unfolded into a honeycomb paper by stretching.

[0099] In some other embodiments, the rotatable connection between the paper tube 31 and the box 40 is achieved by providing a mounting rod on the box 40 that is adapted to the inner diameter of the paper tube 31.

[0100] Figures 18 to 19 A device for unwinding paper sheets in a paper roll into a three-dimensional material according to an embodiment of the present application is schematically shown.

[0101] The device for unwinding paper sheets in a paper roll into a three-dimensional material according to the present embodiment differs from the device for unwinding paper sheets in a paper roll into a three-dimensional material according to the previous embodiments mainly in that, as shown in Figure 18 and Figure 19 The device for unwinding paper sheets in a paper roll into a three-dimensional material further comprises a Sydney paper tube 51 and a Sydney paper 52 wound on the Sydney paper tube 51, the Sydney paper tube 51 is hinged in the box 40 and located on the side of the paper roll damping unit 20 facing the paper outlet opening 411, and the hinge axis of the Sydney paper tube 51 is parallel to the central axis of the paper tube 31 sleeved on the paper roll damping unit 20. Thus, while stretching the paper sheet 321 on the paper roll 32 wound outside the paper tube 31 sleeved on the paper roll damping unit 20, the Sydney paper 52 can also be pulled out to obtain double-layer wrapping paper.

[0102] Figures 20 to 21 A device for unwinding paper sheets in a paper roll into a three-dimensional material according to an embodiment of the present application is schematically shown.

[0103] The device for unwinding paper sheets in a paper roll into a three-dimensional material according to the present embodiment differs from the device for unwinding paper sheets in a paper roll into a three-dimensional material according to the previous embodiments mainly in that, a stop structure 60 for preventing the box 40 placed on the table top 70 from moving in the paper outlet direction is provided on the box 40.

[0104] As one of the embodiments of the stop structure 60, the stop structure 60 is a sticky glue with release paper connecting the box 40 and the table top 70.

[0105] As another embodiment of the stop structure, as shown in Figure 20 and Figure 21As shown, the stop structure 60 is a limiting piece arranged on the box body 40 and used to prevent the box body 40 from moving relative to the table top 70 in the paper ejection direction when the box body 40 moves in the paper ejection direction. The limiting piece can abut against the table top 70 (the limiting piece is connected with the box body 40) or abut against the box body 40 (the limiting piece can be fixed on the table top 70) when the box body 40 moves in the paper ejection direction. The limiting piece can be connected with the box body 40 in a fixed connection manner, for example, connected with the box body 40 through double-sided adhesive tape, or connected with the box body 40 in a clamping manner. In some specific embodiments, as shown in Figure 21 As shown, the stop structure 60 includes a first blocking part 61 and a second blocking part 62. The stop structure 60 is clamped on the box body 40 through the first blocking part 61 and the second blocking part 62. The first blocking part 61 and the second blocking part 62 are arranged such that the first blocking part 61 can prevent the box body 40 from moving relative to the first blocking part 61 in the paper ejection direction X. The second blocking part 62 abuts against the table top 70 on the side of the paper ejection opening 411 to prevent the stop structure 60 from moving relative to the table top 70 in the paper ejection direction x. In other specific embodiments, the stop structure is a limiting piece arranged on the table top 70 and used to prevent the box body 40 from moving relative to the table top 70 in the paper ejection direction when the box body 40 moves in the paper ejection direction. The limiting piece can be fixed on the table top 70, for example, fixed on the table top 70 through adhesive with release paper. The limiting piece fixed on the table top 70 can also have at least one blocking part. In this case, only one blocking part is needed to prevent the box body 40 from moving relative to the blocking part in the paper ejection direction X. For example, the blocking part is arranged on the side of the box body 40 provided with the paper ejection opening 411.

[0106] As one of the embodiments of the limiting piece, the limiting piece can be a sheet metal part.

[0107] In the present application, connection or installation is fixed connection in the absence of special emphasis. The fixed connection can be realized as detachable connection or non-detachable connection commonly used in the prior art. The detachable connection can be realized by using the prior art, such as threaded connection or key connection. The non-detachable connection can also be realized by using the prior art, such as welding or gluing.

[0108] The above only describes some embodiments of the present application. Those skilled in the art can make several modifications and improvements without departing from the inventive concept of the present application, and these all belong to the protection scope of the present application.

Claims

1. A damping unit for paper rolls, characterized in that, The damping unit for the paper roll can be fitted inside the paper tube of the paper roll, and the contact surface between the damping unit and the paper tube is a convex arc surface. The damping unit for the paper roll is configured such that when the paper roll rotates relative to the damping unit, the frictional force applied by the damping unit to the paper tube of the paper roll can keep the actual tension of the paper roll when it is unrolled within the theoretical tension range as the weight of the paper roll changes.

2. The damping unit for paper rolls according to claim 1, characterized in that, The damping unit for the paper roll includes: a fixed plate; and a resistance element disposed on the fixed plate, wherein the frictional force applied to the paper tube decreases as the weight of the paper roll decreases; and / or The resistance element is configured to apply a frictional force to the paper tube under the influence of the paper roll's gravity.

3. The damping unit for paper rolls according to claim 2, characterized in that, The resistance component uses a friction coefficient μ 阻力件 Made of materials with values ​​ranging from 0.3 to 1.5; and / or The damping unit for the paper roll further includes an elastic element and a clamping block; wherein... The two opposite ends of the elastic element abut against the fixed plate and the pressing block, respectively. The resistance element is disposed on the side of the elastic element opposite to the pressing block, so that the pressing block can abut against the inner wall of the paper tube under the elastic force of the elastic element.

4. The damping unit for paper rolls according to claim 3, characterized in that, The clamping block is mounted on the fixed plate via a first moving mechanism. The first moving mechanism is configured to drive the clamping block to reciprocate along the line connecting the clamping block and the resistance member. and / or The fixing plate and the clamping block are provided with positioning blocks for defining the position of the elastic element.

5. The damping unit for paper rolls according to claim 4, characterized in that, The clamping block is provided with a limiting block that limits the distance between the clamping block and the resistance member; and / or The clamping block uses a friction coefficient μ 压紧块 It is made of a material with a value range of 0.1-0.

8.

6. A paper roll, characterized in that, Includes a paper tube, a paper roll, and a damping unit for the paper roll as described in any one of claims 1 to 5; wherein, The paper roll is wound around the outer periphery of the paper tube; At least one end of the paper tube is fitted onto the damping unit for the paper roll, so that when the paper tube rotates relative to the damping unit for the paper roll, the damping unit for the paper roll can apply a frictional force to the paper tube.

7. The paper roll according to claim 6, characterized in that, The opposing ends of the resistance element and the clamping block of the damping unit for the paper roll abut against the inner wall of the paper tube, respectively. The side of the resistance element facing the clamping block abuts against the fixing plate of the damping unit for the paper roll. The end of the elastic element of the damping unit for the paper roll that is away from the resistance element abuts against the clamping block. The end of the elastic element that is away from the clamping block abuts against the fixing plate. The clamping block applies compressive stress to the elastic element along the line connecting the resistance element and the clamping block.

8. The paper roll according to claim 7, characterized in that, The paper tube is configured such that one end of the damping unit for the paper roll is flush with the end face of the roll, and the other end of the paper tube extends beyond the outer side of the roll; and / or The fixing plate is provided with a first blocking part with a diameter larger than that of the paper tube. The first blocking part is provided with an insertion part for non-rotatably inserting into the housing of the device for unfolding the paper sheets in the paper roll into a three-dimensional material.

9. A device for unfolding paper sheets from a paper roll into a three-dimensional material, characterized in that, Includes a housing and a damping unit for paper rolls as described in any one of claims 1 to 5; wherein, The damping unit for the paper roll is disposed on the box body and located in the receiving cavity of the box body. The position of the damping unit for the paper roll on the box body is configured such that the paper roll on the paper tube sleeved on the damping unit for the paper roll is suspended relative to the box body. The box is equipped with a paper output opening.

10. The apparatus for unfolding paper sheets from a paper roll into a three-dimensional material according to claim 9, characterized in that, The housing is also provided with a rotatable connection structure for rotatably connecting to one end of the paper tube that is not equipped with a damping unit for paper roll; and / or The fixing plate of the damping unit for the paper roll is fixedly disposed relative to the box body.

11. The apparatus for unfolding paper sheets from a paper roll into a three-dimensional material according to claim 10, characterized in that, The enclosure includes a main body, a first support, and a second support. The paper roll damping unit is mounted on the first support; The rotating connection structure is mounted on the second bracket; The first bracket and the second bracket are detachably mounted on the box body, and the first bracket and the second bracket are configured to prevent the paper tube mounted on the paper roll damping unit and the second bracket from slipping off the second bracket and the paper roll damping unit; and / or The paper outlet is arranged parallel to the central axis of the paper tube.

12. The apparatus for unfolding paper sheets from a paper roll into a three-dimensional material according to claim 11, characterized in that, The resistance element of the damping unit for the paper roll is located above the clamping block of the damping unit for the paper roll; and / or The fixing plate of the damping unit for the paper roll is provided with a plug-in part for non-rotatable insertion into the box body.

13. The apparatus for unfolding paper sheets from a paper roll into a three-dimensional material according to claim 11, characterized in that, The edges of the paper output opening are rounded; and / or The upper side of the paper output opening is provided with an upward and outward folded edge.

14. The apparatus for unfolding paper sheets from a paper roll into a three-dimensional material according to claim 11, characterized in that, The box body is provided with an observation port that connects the receiving cavity of the box body to the outside, and part of the observation port is aligned with the outer diameter of the paper tube of the paper roll; and / or the box body is provided with a handle.

15. The apparatus for unfolding paper sheets from a paper roll into a three-dimensional material according to any one of claims 11 to 14, characterized in that, It also includes a paper tube with one end wound around the damping unit for the paper roll and the other end rotatably mounted on the housing, and a roll of paper wound around the outer periphery of the paper tube, the roll of paper being a honeycomb paper blank; and / or The housing contains a sherpa paper tube and sherpa paper wound around the sherpa paper tube, which are hinged to the side of the paper roll damping unit facing the paper outlet. The hinge axis of the sherpa paper tube is parallel to the central axis of the paper tube sleeved on the paper roll damping unit.

16. The apparatus for unfolding paper sheets from a paper roll into a three-dimensional material according to any one of claims 11 to 14, characterized in that, The box is provided with a stop structure to prevent the box placed on the table from moving in the paper output direction.

Images