Slit Paper Expansion Device and Slit Paper Expansion Method

Abstract

The present invention discloses a slit paper expanding device and a slit paper expanding method. The expanding device includes a base and a friction assembly. The friction assembly includes a first friction member and a second friction member. The left and right ends of the first friction member and the second friction member are respectively inserted into the left insertion portion and the right insertion portion of the base. The first friction member and the second friction member are provided with adjacent and parallel first friction inclined surfaces and second friction inclined surfaces. The slit paper expanding device of the present invention has a simple structure. Moreover, by using this slit paper expanding device to expand the slit paper, the operation is simple and the slit paper can be fully expanded.

Description

Technical Field

[0001] The present invention relates to the field of packaging, and in particular to a slit paper expanding device and a slit paper expanding method. Background Art

[0002] Slit paper is a sheet material that can expand after being stretched. The expanded slit paper has a three-dimensional honeycomb shape and has a buffering and protecting effect. Therefore, using the expanded slit paper to package products can play a role in protecting the products. Currently, the unexpanded slit paper is generally directly wound around a slit core tube to form a slit paper coil, that is, the slit paper coil includes a slit core tube and the slit paper wound around the slit core tube. Multiple mutually parallel cut marks are formed on the slit paper, and each cut mark is composed of a plurality of slits arranged at intervals. The slits of adjacent cut marks are arranged in a staggered manner; when the slit paper is stretched in a direction perpendicular to the cut marks, the slits will open and the slit paper will expand. The expanded slit paper presents a three-dimensional honeycomb shape and has a buffering effect.

[0003] Currently, there are many slit paper expanding devices on the market for expanding slit paper so that the slit paper can expand. These slit paper expanding devices are of automatic type and manual type. The automatic slit paper expanding device requires two groups of rollers with different rotation speeds to stretch the slit paper, which has a complex structure and high cost. The manual slit paper expanding device also has problems of complex structure and troublesome operation. Summary of the Invention

[0004] The purpose of the present invention is to provide a slit paper expanding device with a simple structure and convenient use, and a slit paper expanding method using the slit paper expanding device.

[0005] To achieve the above object, the solution of the present invention is:

[0006] A slit paper expanding device includes a base and a friction assembly; the base has a left side plate and a right side plate arranged oppositely left and right. The left side plate is provided with a left connecting portion and a left inserting portion in front of the left connecting portion, and the right side plate is provided with a right connecting portion and a right inserting portion in front of the right connecting portion. The right connecting portion is directly opposite to the left connecting portion, and the right inserting portion is directly opposite to the left inserting portion; the friction assembly includes a first friction member and a second friction member; the left and right ends of the first friction member are respectively inserted into the left inserting portion and the right inserting portion. The first friction member is provided with a first friction inclined surface, and the first friction inclined surface inclines backward from top to bottom or the first friction inclined surface inclines forward from top to bottom; the left and right ends of the second friction member are respectively inserted into the left inserting portion and the right inserting portion. The second friction member is provided with a second friction inclined surface adjacent to and above the first friction inclined surface. The second friction inclined surface is parallel to the first friction inclined surface and the second friction inclined surface is oppositely arranged relative to the first friction inclined surface; the left inserting portion and the right inserting portion limit the first friction member and the second friction member from rotating relative to the base.

[0007] The second friction member has a hollow structure.

[0008] The material of the second friction member is a lightweight material.

[0009] The lightweight material is a paper material or a plastic material.

[0010] The left side plate and the right side plate are respectively further provided with a left mounting portion and a right mounting portion facing each other.

[0011] The material of the base is a paper material; the base includes a bottom plate, a left side plate and a right side plate integrally formed; the left side plate includes a left outer side plate, a left inner side plate and an upper left side plate; the lower side edge of the left outer side plate is foldably connected to the left side edge of the bottom plate, the left side edge and the right side edge of the upper left side plate are respectively foldably connected to the upper side edge of the left outer side plate and the upper side edge of the left inner side plate, the lower side edge of the left inner side plate is foldably connected with a left lower inserting tongue, and the bottom plate is provided with a left lower inserting slot for inserting the left lower inserting tongue; both the left connecting portion and the left mounting portion are circular holes opened on the left inner side plate, and the left inserting portion is an opening opened on the left inner side plate; the right side plate includes a right outer side plate, a right inner side plate and an upper right side plate; the lower side edge of the right outer side plate is foldably connected to the right side edge of the bottom plate, the left side edge and the right side edge of the upper right side plate are respectively foldably connected to the upper side edge of the right inner side plate and the upper side edge of the right outer side plate, the lower side edge of the right inner side plate is foldably connected with a right lower inserting tongue, and the bottom plate is provided with a right lower inserting slot for inserting the right lower inserting tongue; the right connecting portion is a U-shaped groove opened on the right inner side plate and having an upper opening, and the upper right side plate is provided with a relief notch communicating with the right connecting portion; the right mounting portion is a circular hole opened on the right inner side plate, and the right inserting portion is an opening opened on the right inner side plate and the right inserting portion is below the right mounting portion; the upper right side plate is provided with a relief opening corresponding to the right inserting portion, and the right inner side plate is provided with a slit, and the slit communicates with the relief opening, the right mounting portion and the right inserting portion.

[0012] The base further includes a rear plate and a top plate; the rear side edge of the base bottom plate is foldably connected to the lower side edge of the rear plate, and the upper side edge of the rear plate is foldably connected to the rear side edge of the top plate; the left side edge and the right side edge of the rear plate are respectively foldably connected with a left rear inserting tongue and a right rear inserting tongue, the left rear inserting tongue is inserted between the left outer side plate and the left inner side plate, and the right rear inserting tongue is inserted between the right outer side plate and the right inner side plate; the left side edge and the right side edge of the top plate are respectively foldably connected with an upper left inserting tongue and an upper right inserting tongue, the upper left side plate is provided with an upper left inserting slot for inserting the upper left inserting tongue, and the upper right side plate is provided with an upper right inserting slot for inserting the upper right inserting tongue.

[0013] The base further includes a front plate, which includes a front outer plate, a front upper plate, and a front inner plate; the lower side edge of the front outer plate is foldably connected to the front side edge of the bottom plate, the front and rear sides of the front upper plate are respectively foldably connected to the upper side edge of the front outer plate and the upper side edge of the front inner plate, and the front upper plate is lower than the left insertion part and the right insertion part; the lower side edge of the front inner plate is provided with a front lower tongue, and the bottom plate is provided with a front lower slot for the front lower tongue to be inserted; the left and right ends of the front outer plate are respectively provided with a left front plate and a right front plate extending upward; the left side edge and the upper side edge of the left front plate are respectively provided with a first left front tongue and a second left front tongue, the first left front tongue is inserted between the left outer plate and the left inner plate, and the second left front tongue is inserted between the top plate and the upper left side plate; the right side edge and the upper side edge of the right front plate are respectively provided with a first right front tongue and a second right front tongue, the first right front tongue is inserted between the right outer plate and the right inner plate, and the second right front tongue is inserted between the top plate and the upper right side plate.

[0014] A slit paper expanding method using the above-mentioned slit paper expanding device, which includes:

[0015] Step 1: Rotationally connect the left and right ends of the slit core tube to the left connecting part and the right connecting part of the base respectively, and an unexpanded slit paper is wound around the slit core tube;

[0016] Step 2: Pull out a section of the slit paper wound around the slit core tube, and pass the pulled-out slit paper through the gap between the first friction inclined surface and the second friction inclined surface of the friction assembly from back to front;

[0017] Step 3: Press the first friction member and the second friction member of the friction assembly, and rotate the slit core tube in the reverse direction, so that the part of the pulled-out slit paper between the first friction inclined surface and the second friction inclined surface of the friction assembly expands, and the part of the pulled-out slit paper between the friction assembly and the slit core tube expands;

[0018] Step 4: Release the pressing on the friction assembly, and then pull the part of the slit paper in front of the friction assembly forward to drive the slit core tube to rotate forward, so that each part of the slit paper wound around the slit core tube passes through the gap between the first friction inclined surface and the second friction inclined surface from back to front in turn, so that the part of the slit paper passing through the gap between the first friction inclined surface and the second friction inclined surface expands under the action of the frictional resistance between the first friction inclined surface and the second friction inclined surface.

[0019] In the second step, after passing the pulled-out slit paper through the gap between the first friction inclined surface and the second friction inclined surface of the friction assembly from back to front, the part of the pulled-out slit paper between the first friction inclined surface and the second friction inclined surface of the friction assembly intersects with the part of the pulled-out slit paper between the friction assembly and the slit core tube.

[0020] After adopting the above scheme, the present invention has the following characteristics:

[0021] 1. The slit paper expansion device of the present invention includes a base and a friction assembly, with few components and a simple structure;

[0022] 2. The base and the friction assembly of the present invention can be made of paper material, which is low in cost and environmentally friendly.

[0023] 3. The slit paper expansion method based on the slit paper expansion device of the present invention is simple to operate and can ensure that the slit paper can fully expand. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 Combined schematic diagram of the base of the present invention Figure 1 ;

[0025] Figure 2 Combined schematic diagram of the base of the present invention Figure 2 ;

[0026] Figure 3 Planar development view of the base of the present invention;

[0027] Figure 4 Structural schematic diagram of the friction assembly of the present invention;

[0028] Figure 5 Cooperated schematic diagram of the slit paper and the slit core tube of the present invention;

[0029] Figure 6 Cooperated schematic diagram of the inner liner paper, the inner liner core tube and the support tube of the present invention;

[0030] Figure 7 Use schematic diagram of the present invention;

[0031] Figure 8 Partial use schematic diagram of the present invention;

[0032] Reference numeral description:

[0033] Base A,

[0034] Left side plate 1, left outer side plate 11, left inner side plate 12, left connecting portion 121, left inserting portion 122, left mounting portion 123, lower left inserting tongue 124, upper left side plate 13, upper left inserting slit 131,

[0035] Right side plate 2, right outer side plate 21, right inner side plate 22, right connecting portion 221, right inserting portion 222, right mounting portion 223, lower right inserting tongue 224, cutting slit 225, upper right side plate 23, relief notch 231, relief opening 232, upper right inserting slit 233,

[0036] Bottom plate 3, lower left inserting slit 31, lower right inserting slit 32, front lower inserting slit 33,

[0037] Rear panel 4, left rear insertion tongue 41, right rear insertion tongue 42,

[0038] Top panel 5, upper left insertion tongue 51, upper right insertion tongue 52,

[0039] Front panel 6, front outer panel 61, left front panel 611, right front panel 612, first left front insertion tongue 613, second left front insertion tongue 614, first right front insertion tongue 615, second right front insertion tongue 616, front upper panel 62, front inner panel 63, front lower insertion tongue 631,

[0040] Friction assembly B,

[0041] First friction member 7, first friction inclined surface 71,

[0042] Second friction member 8, second friction inclined surface 81,

[0043] Slit paper C, slit core tube D, inner lining paper E, inner lining core tube F, support tube G. Detailed implementation mode

[0044] In order to further explain the technical solution of the present invention, the present invention will be elaborated in detail below through specific embodiments.

[0045] As Figures 1 to 8 shown, the present invention discloses a slit paper expansion device, which includes a base A and a friction assembly B; the base A is used to install the friction assembly B and a slit core tube D wound with a slit paper C; the friction assembly B is used to provide a frictional resistance to the slit paper C, so that when people pull the slit paper C, the slit paper C can be stretched to expand the slit paper C, and the operation is simple.

[0046] Specifically, the base A has a left side plate 1 and a right side plate 2 which are arranged oppositely left and right. The left side plate 1 is provided with a left connecting portion 121 and a left inserting portion 122 located in front of the left connecting portion 121. The right side plate 2 is provided with a right connecting portion 221 and a right inserting portion 222 located in front of the right connecting portion 221. The right connecting portion 221 and the left connecting portion 121 face each other, and the right connecting portion 221 and the left connecting portion 121 are used for rotatably connecting with a slit core tube D wound with a slit paper C. The right inserting portion 222 and the left inserting portion 112 face each other. The friction assembly B includes a first friction member 7 and a second friction member 8. The left and right ends of the first friction member 7 are respectively inserted into the left inserting portion 122 and the right inserting portion 222. The first friction member 7 is provided with a first friction inclined surface 71 that slopes backward from top to bottom. The left and right ends of the second friction member 8 are respectively inserted into the left inserting portion 122 and the right inserting portion 222. The left inserting portion 122 and the right inserting portion 222 limit the relative rotation of the first friction member 7 and the second friction member 8 with respect to the base 1. The second friction member 8 is provided with a second friction inclined surface 81 that is adjacent to and above the first friction inclined surface 71. The second friction inclined surface 81 is parallel to the first friction inclined surface 71 and is arranged opposite to the first friction inclined surface 71. The first friction inclined surface 71 and the second friction inclined surface 81 are used to friction the slit paper C so that the slit paper C can fully expand when being pulled through the gap between the first friction inclined surface 71 and the second friction inclined surface 81. It should be noted that the first friction inclined surface 71 is not limited to sloping backward from top to bottom, and the first friction inclined surface 71 can also be arranged to slope forward from top to bottom. In addition, since the left inserting portion 122 and the right inserting portion 222 limit the relative rotation of the first friction member 7 and the second friction member 8 with respect to the base 1, the inclination of the first friction inclined surface 71 and the second friction inclined surface 81 can be kept unchanged, and thus the frictional resistance applied by the first friction member 7 and the second friction member 8 to the slit paper C can be basically unchanged, so that the expansion effect of the slit paper C after passing through the first friction inclined surface 71 and the second friction inclined surface 81 is stable.

[0047] Cooperate Figure 4As shown, the second friction member 8 can be of a hollow structure, so that the second friction member 8 has a light mass. The material of the second friction member 8 can be a light material, making the second friction member 8 have a light mass. And since the second friction member 8 has a light mass, the frictional resistance brought to the slit paper C due to the self-gravity of the second friction member 8 is small. Thus, when pulling the slit paper C and making each part of the slit paper C pass through the gap between the first friction inclined plane 71 and the second friction inclined plane 81 in sequence from the back to the front, the situation of the slit paper C being torn can be avoided. Specifically, since the slit paper C mainly expands by frictional resistance during expansion, and the frictional resistance on the slit paper C passing through between the first friction inclined plane 71 and the second friction inclined plane 81 mainly comes from two parts. One part of the frictional resistance is the frictional resistance caused by the gravity of the second friction member 8 to the slit paper C passing through between the first friction inclined plane 71 and the second friction inclined plane 81, and the other part of the frictional resistance is the frictional resistance caused by the pulling force for pulling the slit paper C to the slit paper C passing through between the first friction inclined plane 71 and the second friction inclined plane 81. And since the second friction member 8 has a light mass, the self-gravity of the second friction member 8 can be small, so that the frictional resistance brought to the slit paper C due to the self-gravity of the second friction member 8 is small, making the frictional resistance on the slit paper C when people pull the slit paper C not too large to cause the slit paper C to be torn. It should be noted that the light material used for the second friction member 8 can be a paper material. The paper second friction member 8 has a low cost and a light mass. The light material used for the second friction member 8 can also be a plastic material. The plastic second friction member 8 has a light mass and a low cost.

[0048] cooperate Figure 4 As shown, the first friction member 7 is also of a hollow structure, so that the first friction member 7 has a light mass. The material of the first friction member 7 can also be a light material, making the first friction member 7 have a light mass, and further making the pressure of the first friction member 7 on the base A small. The inclination angle of the first friction inclined plane 71 can be selected to be 30° to 75°. The inclination angle of the first friction inclined plane 71 is the angle formed between the first friction inclined plane 71 and the horizontal plane. Specifically, the light material used for the first friction member 7 can be a paper material. The paper first friction member 7 has a low cost and a light mass. The light material used for the first friction member 7 can also be a plastic material. The plastic first friction member 7 has a light mass and a low cost.

[0049] cooperate Figure 4As shown, both the first friction member 7 and the second friction member 8 are triangular prism structures, and the first friction member 7 and the second friction member 8 can be formed by folding and bonding cardboard. It should be noted that the first friction member 7 and the second friction member 8 can adopt other prism structures, such as quadrangular prism structures and pentagonal prism structures, and the first friction member 7 and the second friction member 8 do not need to adopt the same prism structure. As long as the first friction member 7 and the second friction member 8 can be respectively provided with a first friction inclined surface 71 and a second friction inclined surface 81 in the present invention. Correspondingly, the shapes of the left insertion portion 122 and the right insertion portion 222 are adapted to the shape after the combination of the first friction member 7 and the second friction member 8, so as to limit the rotation of the first friction member 7 and the second friction member 8 relative to the base A. For example, if the first friction member 7 and the second friction member 8 are combined to form a rectangular structure, the shapes of the left insertion portion 122 and the right insertion portion 222 are also rectangular structures.

[0050] Cooperate Figures 1 to 3 As shown, the left side plate 1 and the right side plate 2 of the base A can also be respectively provided with a left mounting portion 123 and a right mounting portion 223 that face each other. The left mounting portion 123 and the right mounting portion 223 can be connected to a support tube G. The inner liner core tube F wrapped with the inner liner paper E can be rotatably sleeved on the support tube G. In this way, people can pull out the inner liner paper E on the inner liner core tube F. The pulled-out inner liner paper E can be superimposed on the expanded slit paper C, and then the two can be wrapped around the product to be packaged together, so as to better package the product. The inner liner paper E can be used to cover the product to prevent people from seeing the appearance of the product.

[0051] The material of the base A is paper material, and the base A is formed by folding cardboard. In this way, the cost of the base A is low and it is environmentally friendly. Specifically, the base A includes a left side plate 1, a right side plate 2 and a bottom plate 3 that are integrally formed. Among them, the left side plate 1 includes a left outer side plate 11, a left inner side plate 12 and an upper left side plate 13. The lower side edge of the left outer side plate 11 is foldably connected to the left side edge of the bottom plate 3. The left and right side edges of the upper left side plate 13 are respectively foldably connected to the upper side edge of the left outer side plate 11 and the upper side edge of the left inner side plate 12. The lower side edge of the left inner side plate 12 is foldably connected with a lower left inserting tongue 124, and the bottom plate 3 is provided with a lower left inserting slot 31 for the lower left inserting tongue 124 to be inserted. The right side plate 2 includes a right outer side plate 21, a right inner side plate 22 and an upper right side plate 23. The lower side edge of the right outer side plate 21 is foldably connected to the right side edge of the bottom plate 3. The left and right side edges of the upper right side plate 23 are respectively foldably connected to the upper side edge of the right inner side plate 22 and the upper side edge of the right outer side plate 21. The lower side edge of the right inner side plate 22 is foldably connected with a lower right inserting tongue 224, and the bottom plate 3 is provided with a lower right inserting slot 32 for the lower right inserting tongue 224 to be inserted. Cooperate Figures 1 to 3As shown, the left connecting portion 121 and the left mounting portion 123 of the base A are both round holes opened on the left inner plate, and the left plug-in portion 122 is an opening opened on the left inner plate; the right connecting portion 221 of the base A is a U-shaped groove opened on the right inner plate 22 and opened at the upper part, and the upper right plate 23 is provided with a clearance notch 231 communicating with the right connecting portion 33, and the clearance notch 231 enables the slit core tube to be inserted between the left outer plate 11 and the left inner plate 12 to improve the installation stability of the slit core tube; the right mounting portion 223 is a round hole opened on the right inner plate 22 The right plug-in portion 222 is an opening formed on the right inner plate 22 and is located below the right mounting portion 223; the right upper plate 23 is provided with a clearance opening 232 corresponding to the right plug-in portion 222, and the right inner plate 22 is provided with a slit 225, which connects the clearance opening 232, the right mounting portion 223 and the right plug-in portion 222. The clearance opening 232 enables the support tube, the first friction member 7 and the second friction member 8 to be inserted between the right outer plate 21 and the right inner plate 22, thereby improving the installation stability of the support tube, the first friction member 7 and the second friction member 8. When the slit core tube D is to be connected with the left connecting part 121 and the right connecting part 221, the left end of the slit core tube D is first inserted into the left connecting part 121, and then the left end of the slit core tube D is inserted into the right connecting part 221 from the upper opening of the right connecting part 221; and when the first friction member 7 is connected with the left plug-in part 122 and the right plug-in part 222, the left end of the first friction member 7 is first inserted into the left plug-in part 122, and then the two sides of the slit 225 are opened to expand the gap of the slit 225, and finally the right end of the first friction member 7 is inserted into the right plug-in part 222 from the slit 225; and the second friction member 8 is connected with the left plug-in part 122. When the support tube G is connected to the left mounting portion 123 and the right mounting portion 223, the left end of the support tube G is first inserted into the left mounting portion 123, and then the two sides of the slit 225 are opened to expand the gap of the slit 225, and finally the right end of the second friction member 8 is inserted into the right mounting portion 222 from the slit 225; similarly, when the support tube G is connected to the left mounting portion 123 and the right mounting portion 223, the left end of the support tube G is first inserted into the left mounting portion 123, and then the two sides of the slit 225 are opened to expand the gap of the slit 225, and finally the right end of the support tube G is inserted into the right mounting portion 223 from the slit 225.

[0052] Cooperate Figures 1 to 3As shown in the figure, the base A further includes a rear plate 4 and a top plate 5; the lower side edge of the rear plate 4 is foldedly connected to the rear side edge of the bottom plate 3, and the upper side edge of the rear plate 4 is foldedly connected to the rear side edge of the top plate 5; the left and right side edges of the rear plate 4 are respectively foldedly connected with a left rear tongue 41 and a right rear tongue 42, the left rear tongue 41 is inserted between the left outer plate 11 and the left inner plate 12, and the right rear tongue 42 is inserted between the right outer plate 21 and the right inner plate 22. In this way, the left and right side plates 1 and 2 can be limited by the rear plate 4, so that the structure of the base A is stable; the left and right side edges of the top plate 5 are respectively foldedly connected with a left upper tongue 51 and a right upper tongue 52, the left upper side plate 13 is provided with a left upper slot 131 for inserting the left upper tongue 51, and the right upper side plate 23 is provided with a right upper slot 233 for inserting the right upper tongue 52. In the present invention, the left and right side plates 1 and 2 can be limited by the top plate 5, so that the structure of the base A is stable.

[0053] cooperate Figures 1 to 3 As shown in the figure, the base A further includes a front plate 6, and the front plate 6 includes a front outer plate 61, a front upper plate 62 and a front inner plate 63; wherein the lower side edge of the front outer plate 61 is foldedly connected to the front side edge of the bottom plate 3, the front and rear sides of the front upper plate 62 are respectively foldedly connected to the upper side edge of the front outer plate 61 and the upper side edge of the front inner plate 63, and the front upper plate 62 is lower than the left insertion part 122 and the right insertion part 222; the lower side edge of the front inner plate 63 is provided with a front lower tongue 631, and the bottom plate 3 is provided with a front lower slot 33 for inserting the front lower tongue 631; the left and right ends of the front outer plate 61 are respectively provided with a left front plate 611 and a right front plate 612 extending upward; the left side edge and the upper side edge of the left front plate 611 are respectively provided with a first left front tongue 613 and a second left front tongue 614, the first left front tongue 613 is inserted between the left outer plate 11 and the left inner plate 12, and the second left front tongue 614 is inserted between the top plate 5 and the left upper side plate 13; the right side edge and the upper side edge of the right front plate 612 are respectively provided with a first right front tongue 615 and a second right front tongue 616, the first right front tongue 615 is inserted between the right outer plate 21 and the right inner plate 22, and the second right front tongue 616 is inserted between the top plate 5 and the right upper side plate 23; in the present invention, the left and right side plates 1 and 2 can be limited by the front plate 6, so that the structure of the base A is stable.

[0054] The present invention also discloses a slit paper expansion method using the above-mentioned slit paper expansion device, which includes:

[0055] Step 1: Rotationally connect the left and right ends of the slit core tube D to the left connection part 121 and the right connection part 221 of the base 1 respectively, and an unexpanded slit paper C is wound around the slit core tube D;

[0056] Step 2: Pull out a section of the slit paper C wound around the slit core tube D, and pass the pulled-out slit paper C from back to front through the gap between the first friction inclined surface 71 and the second friction inclined surface 81 of the friction assembly B;

[0057] Step 3: Press the first friction member 7 and the second friction member 8 of the friction assembly D, and reversely rotate the slit core tube D, so that the part of the drawn slit paper C between the first friction inclined surface 71 and the second friction inclined surface 81 of the friction assembly B expands, and the part of the drawn slit paper C between the friction assembly B and the slit core tube D expands;

[0058] Step 4: Release the pressing on the friction assembly B, and then forwardly pull the part of the slit paper C in front of the friction assembly B to drive the slit core tube D to rotate forward, so that each part of the slit paper B wound around the slit core tube D sequentially passes through the gap between the first friction inclined surface 71 and the second friction inclined surface 81 from back to front, so that the part of the slit paper C passing through the gap between the first friction inclined surface 71 and the second friction inclined surface 72 expands under the action of the frictional resistance between the first friction inclined surface 71 and the second friction inclined surface 81.

[0059] In the present invention, through Step 3, the part of the drawn slit paper C between the first friction inclined surface 71 and the second friction inclined surface 81 of the friction assembly B expands, and the part of the drawn slit paper C between the first friction inclined surface 71 and the second friction inclined surface 81 of the friction assembly B expands, so that the first friction inclined surface 71 and the second friction inclined surface 81 can provide greater frictional resistance to the slit paper C, and further the slit paper C after being frictionally contacted by the first friction inclined surface 71 and the second friction inclined surface 81 can fully expand.

[0060] In Step 2, after the drawn slit paper C passes through the gap between the first friction inclined surface 71 and the second friction inclined surface 81 of the friction assembly B from back to front, the part of the drawn slit paper C between the first friction inclined surface 71 and the second friction inclined surface 81 of the friction assembly B intersects with the part of the drawn slit paper C between the friction assembly B and the slit core tube D, so that the part of the slit paper C between the friction assembly B and the slit core tube D in a drawn section has a greater tension. In this way, when performing the operation of Step 4, the part of the slit paper C between the friction assembly B and the slit core tube D can be initially expanded, and the initially expanded slit paper can be fully expanded after being frictionally contacted by the first friction inclined surface 71 and the second friction inclined surface 81.

[0061] In Step 4, forwardly pulling the part of the slit paper C in front of the friction assembly B can be forwardly pulling the part of the slit paper C in front of the friction assembly B horizontally forward, or forwardly pulling the part of the slit paper C in front of the friction assembly B forwardly in an inclined manner; preferably, in Step 4, the part of the slit paper C in front of the friction assembly B is forwardly pulled horizontally.

[0062] The above embodiments and diagrams do not limit the product form and style of the present invention. Any appropriate changes or modifications made by those of ordinary skill in the art shall be regarded as not departing from the patent scope of the present invention.

Claims

1. A slit paper expansion device, characterized in that: Comprising a base and a friction assembly; The base has a left side plate and a right side plate arranged opposite to each other left and right. The left side plate is provided with a left connecting portion and a left insertion portion in front of the left connecting portion. The right side plate is provided with a right connecting portion and a right insertion portion in front of the right connecting portion. The right connecting portion and the left connecting portion face each other, and the right insertion portion and the left insertion portion face each other; The friction assembly includes a first friction member and a second friction member; the left and right ends of the first friction member are respectively inserted into the left insertion portion and the right insertion portion. The first friction member is provided with a first friction inclined surface, and the first friction inclined surface slopes backward from top to bottom or slopes forward from top to bottom; the left and right ends of the second friction member are respectively inserted into the left insertion portion and the right insertion portion. The second friction member is provided with a second friction inclined surface adjacent to and above the first friction inclined surface. The second friction inclined surface is parallel to the first friction inclined surface and is arranged opposite to the first friction inclined surface; the left insertion portion and the right insertion portion limit the first friction member and the second friction member from rotating relative to the base.

2. The slit paper expansion device according to claim 1, characterized in that: The second friction member is of a hollow structure.

3. The slit paper expanding device according to claim 1 or 2, characterized in that: The material of the second friction member is a lightweight material.

4. The slit paper expanding device according to claim 3, characterized in that: The lightweight material is a paper material or a plastic material.

5. The slit paper expansion device according to claim 1, wherein: The left side plate and the right side plate are also respectively provided with a left mounting portion and a right mounting portion that face each other.

6. The slit paper expansion device according to claim 5, characterized in that: The material of the base is a paper material; the base includes a bottom plate, a left side plate, and a right side plate that are integrally formed; The left side plate includes a left outer side plate, a left inner side plate, and an upper left side plate; the lower side edge of the left outer side plate is foldably connected to the left side edge of the bottom plate. The left side edge and the right side edge of the upper left side plate are respectively foldably connected to the upper side edge of the left outer side plate and the upper side edge of the left inner side plate. The lower side edge of the left inner side plate is foldably connected with a lower left tongue, and the bottom plate is provided with a lower left slot for inserting the lower left tongue; the left connecting portion and the left mounting portion are both circular holes opened on the left inner side plate, and the left insertion portion is an opening opened on the left inner side plate; The right side plate includes a right outer side plate, a right inner side plate, and an upper right side plate; the lower side edge of the right outer side plate is foldably connected to the right side edge of the bottom plate. The left side edge and the right side edge of the upper right side plate are respectively foldably connected to the upper side edge of the right inner side plate and the upper side edge of the right outer side plate. The lower side edge of the right inner side plate is foldably connected with a lower right tongue, and the bottom plate is provided with a lower right slot for inserting the lower right tongue; the right connecting portion is a U-shaped groove opened on the right inner side plate and having an upper opening. The upper right side plate is provided with a relief notch communicating with the right connecting portion; the right mounting portion is a circular hole opened on the right inner side plate, and the right insertion portion is an opening opened on the right inner side plate and the right insertion portion is below the right mounting portion; the upper right side plate is provided with a relief opening corresponding to the right insertion portion, and the right inner side plate is provided with a slit, and the slit communicates with the relief opening, the right mounting portion, and the right insertion portion.

7. The slit paper expanding device according to claim 6, wherein: The base further includes a rear plate and a top plate; the rear side edge of the base bottom plate is foldably connected to the lower side edge of the rear plate, and the upper side edge of the rear plate is foldably connected to the rear side edge of the top plate; the left side edge and the right side edge of the rear plate are respectively foldably connected with a left rear tongue and a right rear tongue, the left rear tongue is inserted between the left outer plate and the left inner plate, and the right rear tongue is inserted between the right outer plate and the right inner plate; the left side edge and the right side edge of the top plate are respectively foldably connected with a left upper tongue and a right upper tongue, the left upper side plate is provided with a left upper slot for inserting the left upper tongue, and the right upper side plate is provided with a right upper slot for inserting the right upper tongue.

8. The slit paper expanding device according to claim 7, wherein: The base further includes a front plate, and the front plate includes a front outer plate, a front upper plate and a front inner plate; the lower side edge of the front outer plate is foldably connected to the front side edge of the bottom plate, the front and rear sides of the front upper plate are respectively foldably connected to the upper side edge of the front outer plate and the upper side edge of the front inner plate, and the front upper plate is lower than the left plugging portion and the right plugging portion; the lower side edge of the front inner plate is provided with a front lower tongue, and the bottom plate is provided with a front lower slot for inserting the front lower tongue; the left and right ends of the front outer plate are respectively provided with a left front plate and a right front plate extending upward; the left side edge and the upper side edge of the left front plate are respectively provided with a first left front tongue and a second left front tongue, the first left front tongue is inserted between the left outer plate and the left inner plate, and the second left front tongue is inserted between the top plate and the left upper side plate; the right side edge and the upper side edge of the right front plate are respectively provided with a first right front tongue and a second right front tongue, the first right front tongue is inserted between the right outer plate and the right inner plate, and the second right front tongue is inserted between the top plate and the right upper side plate.

9. A slit paper expanding method using the slit paper expanding device as described in claim 1, characterized in that: Including: Step 1: Rotationally connect the left and right ends of the slit core tube to the left connecting portion and the right connecting portion of the base respectively, and an unexpanded slit paper is wound around the slit core tube. Step 2: Pull out a section of the slit paper wound around the slit core tube, and pass the pulled-out slit paper from the rear to the front through the gap between the first friction inclined surface and the second friction inclined surface of the friction assembly. Step 3: Press the first friction member and the second friction member of the friction assembly, and rotate the slit core tube in the reverse direction, so that the part of the pulled-out slit paper between the first friction inclined surface and the second friction inclined surface of the friction assembly expands, and the part of the pulled-out slit paper between the friction assembly and the slit core tube expands. Step 4: Release the pressing on the friction assembly, and then pull the part of the slit paper in front of the friction assembly forward to drive the slit core tube to rotate forward, so that each part of the slit paper wound around the slit core tube sequentially passes through the gap between the first friction inclined surface and the second friction inclined surface from the rear to the front, so that the part of the slit paper passing through the gap between the first friction inclined surface and the second friction inclined surface expands under the action of the frictional resistance between the first friction inclined surface and the second friction inclined surface.

10. The slit paper expansion method according to claim 9, wherein: In the second step, after the pulled-out slit paper passes through the gap between the first friction inclined surface and the second friction inclined surface of the friction assembly from the rear to the front, the part of the pulled-out slit paper between the first friction inclined surface and the second friction inclined surface of the friction assembly intersects with the part of the pulled-out slit paper between the friction assembly and the slit core tube.

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