Egg boxing equipment

By designing slidable and adjustable egg box components, the problem that the egg placement area in traditional egg boxing equipment cannot be changed in size, achieving effective protection and adaptability for eggs of different sizes.

CN119911475AInactive Publication Date: 2025-05-02CHONGQING NONGZHONG FOOD CO LTD
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Patent Information

Application Number
CN202510182586.6
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-02-19
Publication Date
2025-05-02
Estimated Expiration
Not applicable · inactive patent

AI Technical Summary

Technical Problem

In traditional egg boxing equipment, the egg placement area cannot be changed, resulting in poor adaptability and ineffective protection of eggs of different sizes.

Method used

An apparatus is designed including an upper lid, a lower box and an egg box assembly that can be slidably entered into the lower box. The egg box assembly consists of mounting plates, placement slots, elastic ropes and variable diameter components, through which the flexible fixation of eggs and adaptation to eggs of different sizes.

Benefits of technology

By flexibly adjusting the size and shape of the egg box components, it can effectively adapt to eggs of different sizes, improving the placement adaptability and safety of eggs and reducing the egg crushing rate.

✦ Generated by Eureka AI based on patent content.

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Abstract

The invention relates to the technical field of egg boxing, and particularly discloses egg boxing equipment which comprises an upper cover, a lower box and an egg box assembly arranged in the lower box, and the egg box assembly slides into the lower box; the egg box assembly comprises a mounting plate, a plurality of placing grooves which are uniformly formed in the mounting plate and are used for placing eggs, a plurality of elastic ropes which are arranged in the placing grooves and are used for preliminarily limiting the inner diameter, and a matching assembly which is matched with the elastic ropes; a plurality of notches are formed in the periphery of the containing groove, and variable-caliber assemblies are installed at the positions of the notches. The variable-caliber assembly comprises a connecting plate fixedly connected to the notch position, a first plate rotationally connected with the connecting plate and a second plate rotationally connected with the connecting plate, the first plate and the second plate are detachably connected, and the second plate makes contact with the elastic rope after rotating. According to the device, the problem that the adaptability is very poor due to the fact that the size of an egg placing area in traditional egg boxing equipment cannot be changed is solved.
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Description

Technical Field

[0001] The present application relates to the technical field of egg cartoning, and specifically discloses an egg cartoning device. Background Art

[0002] Eggs are a well-known nutritious food, but their shells are easily broken, which brings great inconvenience to carrying, storing and transporting. In commonly used containers such as bags and baskets, eggs are in direct contact with each other, and are easily damaged by squeezing and colliding with each other.

[0003] In order to solve the above problems, there are many egg packaging boxes on the market that are divided into multiple independent areas. Eggs are placed in separate areas to prevent collisions. However, the independent areas of the above structure are of fixed size and cannot adapt well to eggs of different sizes. The safety performance still needs to be improved.

[0004] In view of this, the inventor proposed an egg box packing device. Summary of the invention

[0005] The purpose of the present invention is to solve the problem that the egg placement area in the traditional egg boxing equipment cannot be changed in size, resulting in poor adaptability.

[0006] In order to achieve the above object, the present invention provides the following basic scheme:

[0007] An egg box packing device comprises an upper cover, a lower box and an egg box assembly arranged in the lower box, wherein the egg box assembly slides into the lower box;

[0008] The egg box assembly includes a mounting plate, a plurality of placement slots evenly arranged on the mounting plate for placing eggs, a plurality of elastic ropes arranged in the placement slots for initially limiting the inner diameter, and a matching assembly of matching elastic ropes;

[0009] A plurality of notches are provided around the placement slot, and variable-caliber components are installed at the notches;

[0010] The variable-caliber assembly includes a connecting plate fixed at the notch position, a first plate rotatably connected to the connecting plate, and a second plate rotatably connected to the connecting plate. The first plate and the second plate are detachably connected, and the second plate contacts the elastic rope after rotation.

[0011] The principles and effects of this basic solution are:

[0012] 1. Compared with the prior art, the present device has a simple structure and an ingenious design. The present device is provided with a plurality of egg box components for placing eggs. The egg box components are used to solve the problem that the egg placement area in the traditional egg packing equipment cannot be changed in size, resulting in poor adaptability. In addition, the egg box components in the present case are placed vertically up and down, which can maximize the use of space, thereby realizing the vertical placement of multiple egg box components up and down.

[0013] 2. Compared with the prior art, based on the vertical placement of the egg box assembly, the eggs are located in the upper egg box assembly and the lower egg box assembly, and the eggs are fixed up and down by using the lower egg box assembly and the upper egg box assembly, thereby improving the firmness of the eggs when placed up and down.

[0014] 3. Compared with the prior art, the present device makes improvements on the egg box assembly, and provides an elastic rope and related components matching the elastic rope. When the eggs are placed, the elastic rope is located around the eggs, so that the placement space of the eggs is initially limited, and the adaptability of the egg placement is initially improved.

[0015] 4. Compared with the prior art, since the eggs are placed in a separate area with a fixed size, the device cannot adapt well to eggs of different sizes. For this reason, the device is provided with a variable-caliber component, which is installed in the egg box component. The variable-caliber component can limit the original caliber in the egg box component, thereby reducing the caliber. After reducing the caliber by the variable-caliber component, the position of the egg is restricted again. Moreover, the variable-caliber component restricts the surrounding of the egg. Since the lower egg box component and the upper egg box component realize the upper and lower fixation of the egg, the device can realize the comprehensive fixation of the egg, and can be applicable to the fixation of eggs of multiple sizes, so that the universality of the device is improved, thereby solving the problem that the egg placement area in the traditional egg boxing equipment cannot change the size, resulting in poor adaptability.

[0016] 5. Compared with the prior art, the variable-caliber component and the elastic rope in the present device not only complement each other on the surroundings of the egg, but also, since the variable-caliber component will contact the egg, there is a probability of hard contact and crushing. At this time, the elastic rope plays an auxiliary role, that is, the variable-caliber component no longer directly contacts the surface of the egg, but contacts the elastic rope, squeezes the elastic rope, and then acts on the surroundings of the egg. The mutual cooperation between the variable-caliber component and the elastic rope changes the hard contact of the egg to a soft contact, thereby reducing the breakage rate of the egg.

[0017] 6. Compared with the prior art, this device has a reasonable design, is easy to disassemble and assemble, and is easy to clean. It can be applied to eggs of different shapes and volumes, provides good protection for the eggs, and is convenient for carrying and transporting the eggs.

[0018] Furthermore, the upper cover and the lower box are detachably connected, and further include a connecting assembly, through which the upper cover and the lower box are detachably connected, the connecting assembly includes a first connecting block fixedly connected to one side of the upper cover, a second connecting block fixedly connected to the lower box on the same side as the first connecting block, and a connecting bolt, the connecting bolt connecting the first connecting block and the second connecting block. The upper cover and the lower box are detachably connected through the connecting assembly.

[0019] Furthermore, a plurality of mounting grooves are formed around the inner bottom of the box body, and sliding rods are installed in the mounting grooves. The free ends of the sliding rods are in contact with the inner top of the upper cover, and the egg box components are slidably connected to the sliding rods, and the eggs are located between adjacent egg box components. Since there are multiple egg box components, the egg box components are placed vertically up and down using the sliding rod mode, which is conducive to maximizing the use of the space in the lower box, and since the eggs are located between the egg box components, the egg box components can play a role in vertical protection for the eggs.

[0020] Furthermore, a connecting frame is arranged on the outer periphery of the mounting plate, and sliding holes are opened on the connecting frame, the number and position of which correspond to the sliding rods one by one, and the sliding rods slide in the sliding holes.

[0021] Furthermore, the matching assembly includes a flexible connection plate fixed to the inner wall of the placement groove and arranged circumferentially, a contact pad and a sponge pad fixed to the bottom of the placement groove, the elastic rope is evenly arranged on the inner wall of the placement groove, one end of the elastic rope is connected to the flexible connection plate, and the other end of the elastic rope is connected to the contact pad. When the egg is placed, the elastic rope is located around the egg, so that the placement space of the egg is initially limited, and the adaptability of the egg placement is initially improved.

[0022] Further, the bottom of the egg contacts the sponge pad at the same position as the egg, and the top of the egg contacts the sponge pad in the egg box assembly on the upper side under the action of the sliding rod, so that the egg can be softly contacted.

[0023] Furthermore, a groove is formed on the surface of the connecting plate, a through groove is formed on one side of the groove, a first rotating bracket is symmetrically fixedly connected to one side of the through groove, a first shaft is connected to the first rotating bracket, the first shaft is rotatably connected to the first plate, a second rotating bracket is symmetrically fixedly connected to the side of the groove away from the first rotating bracket, a second shaft is connected to the second rotating bracket, the second shaft is rotatably connected to the second plate, so as to realize the rotatable connection between the second plate and the first plate.

[0024] Furthermore, when the first plate is not rotated, the first plate is in the through groove and the depth of the through groove is equal to the thickness of the first plate, and when the second plate is not rotated, the second plate is in the groove and the depth of the groove is equal to the thickness of the second plate. When the variable-caliber assembly is not in use, the first plate and the second plate are both in the groove, and the variable-caliber assembly looks more beautiful as a whole.

[0025] Furthermore, the bottom of the connecting plate away from the groove is provided with mounting points all around, the notch position is provided with a connecting point corresponding to the mounting point, and the mounting point and the connecting point are fixedly connected to achieve the installation of the variable-caliber component.

[0026] Furthermore, the second plate is provided with a plurality of engaging grooves at one end close to the first plate, and a plurality of engaging protrusions are provided at the end of the first plate, the engaging grooves are engaged with the engaging protrusions, and the engaging grooves are evenly arranged from top to bottom. The end surface of the second plate away from the engaging grooves is provided with a friction surface, and when the second plate rotates, the engaging protrusions are inserted into different engaging grooves, and the second plate shows different tilt angles to complete the caliber change, and the friction surface is squeezed and contacted with the elastic rope. By inserting the engaging protrusions into different engaging grooves, the second plate is made to have different tilt angles, thereby realizing the effect of the second plate on the caliber change of the inner wall of the placement groove. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For those skilled in the art, other drawings can be obtained based on these drawings without creative work.

[0028] Figure 1 A schematic diagram of the structure of an egg box packing device proposed in an embodiment of the present application is shown;

[0029] Figure 2 An enlarged schematic diagram of an egg box assembly in an egg box packing device proposed in an embodiment of the present application is shown;

[0030] Figure 3 The figure shows the installation position of the elastic rope in the egg box packing device proposed in the embodiment of the present application;

[0031] Figure 4 A schematic diagram of egg boxing in an egg boxing device proposed in an embodiment of the present application is shown;

[0032] Figure 5 A schematic structural diagram of a variable-caliber component in an egg cartoning device proposed in an embodiment of the present application is shown;

[0033] Figure 6 The present invention shows an egg box packing device. Figure 5 A schematic structural diagram of the variable aperture component from another angle. DETAILED DESCRIPTION

[0034] In order to further explain the technical means and effects adopted by the present invention to achieve the predetermined invention purpose, the specific implementation mode, structure, characteristics and effects of the present invention are described in detail below in combination with the accompanying drawings and preferred embodiments.

[0035] The figure marks in the drawings of the specification include: upper cover 1, first connecting block 2, handle 3, sliding rod 4, egg box assembly 5, connecting frame 501, mounting plate 502, lower box 6, second connecting block 7, mounting groove 8, placement groove 9, flexible connecting plate 10, contact pad 11, elastic rope 12, egg 13, sponge pad 14, variable-caliber assembly 15, connecting plate 1501, groove 1502, mounting point 1503, through groove 1504, first plate 1505, snap-on protrusion 1506, first rotating bracket 1507, second rotating bracket 1508, second axis 1509, second plate 1511, snap-on groove 1512, friction surface 1513, and notch 16.

[0036] Implementation example Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 and Figure 6 As shown:

[0037] An egg box packing device comprises an upper cover 1, a lower box 6 and an egg box assembly 5 arranged in the lower box 6, wherein the egg box assembly 5 slides into the lower box 6;

[0038] Regarding the upper cover 1 and the lower box 6:

[0039] The upper cover 1 and the lower box 6 are detachably connected. The upper cover 1 is provided with a handle 3 for carrying the device. The upper cover 1 also includes a connection assembly, through which the upper cover 1 and the lower box 6 are detachably connected. The connection assembly includes a first connection block 2 fixedly connected to the left side of the upper cover 1, a second connection block 7 fixedly connected to the lower box 6 on the same side as the first connection block 2, and a connection bolt, and the connection bolt connects the first connection block 2 and the second connection block 7. The upper cover 1 and the lower box 6 are detachably connected through the connection assembly.

[0040] Specifically: the connecting bolts penetrate the first connecting block 2 and the second connecting block 7, and then the nuts are threadedly connected to the connecting bolts, thereby closing the upper cover 1 and the lower box 6, and completing the detachable connection between the upper cover 1 and the lower box 6;

[0041] Regarding the connection assembly, this embodiment only discloses the simplest form, and hinge-type or latch-type connection assemblies are both suitable for this device.

[0042] About egg box component 5 Figure 1 The vertical up-and-down sliding arrangement shown in the figure has a plurality of mounting grooves 8 opened around the inner bottom of the box body, and the mounting grooves are all equipped with sliding rods 4, and the free ends of the sliding rods 4 are in contact with the inner top of the upper cover 1, and the egg box components 5 are slidably connected with the sliding rods 4, and the eggs 13 are located between the adjacent egg box components 5. Since there are multiple egg box components 5, after the egg box components 5 are placed vertically up and down using the mode of the sliding rods 4, it is beneficial to maximize the use of the space of the lower box 6, and since the eggs 13 are located between the egg box components 5, the egg box components 5 can play a role of protecting the eggs 13 in a vertical direction.

[0043] like Figure 2 and Figure 4 As shown:

[0044] The egg box assembly 5 includes a mounting plate 502, a plurality of placement slots 9 evenly arranged on the mounting plate 502 for placing eggs 13, a plurality of elastic ropes 12 arranged in the placement slots 9 for initially limiting the inner diameter, and a matching assembly of the matching elastic ropes 12;

[0045] About the matching assembly: the matching assembly includes a flexible connecting plate 10 fixed to the inner wall of the placement groove 9 and arranged circumferentially, a contact pad 11 and a sponge pad 14 fixed to the bottom of the placement groove 9, the elastic rope 12 is evenly arranged on the inner wall of the placement groove 9, one end of the elastic rope 12 is connected to the flexible connecting plate 10, and the other end of the elastic rope 12 is connected to the contact pad 11. When the egg 13 is placed, the elastic rope 12 is located around the egg 13, so that the placement space of the egg 13 is initially limited, and the adaptability of the placement of the egg 13 is initially improved.

[0046] like Figure 4 As shown, the bottom of the egg 13 contacts the sponge pad 14 located at the same position as the egg 13, and the top of the egg 13 contacts the sponge pad 14 located in the upper egg box assembly 5 under the action of the sliding rod 4. For the egg 13, the soft contact of the egg 13 is achieved.

[0047] Specifically: the egg 13 is placed in the placement slot 9, so that the flexible connecting plate 10 moves downward, and then the elastic rope 12 is pulled up. At this time, the elastic rope 12 is located around the egg 13. All the elastic ropes 12 are combined together on the periphery of the egg 13, which is equivalent to limiting the placement space of the egg 13, so that the placement space of the egg 13 is initially limited. For details, see Figure 4 ;

[0048] The placement slot 9 is provided with a plurality of notches 16 around it, and a variable-caliber assembly 15 is installed at the position of the notches 16;

[0049] The variable-caliber assembly 15 includes a connecting plate 1501 fixed at the position of the notch 16, a first plate 1505 rotatably connected to the connecting plate 1501, and a second plate 1511 rotatably connected to the connecting plate 1501. The first plate 1505 and the second plate 1511 are detachably connected, and the second plate 1511 contacts the elastic rope 12 after rotation.

[0050] like Figure 5 and Figure 6 As shown:

[0051] A groove 1502 is formed on the surface of the connecting plate 1501, a through groove 1504 is formed on one side of the groove 1502, a first rotating bracket 1507 is symmetrically fixedly connected to one side of the through groove 1504, a first shaft is connected to the first rotating bracket 1507, and the first shaft is rotatably connected to the first plate 1505, a second rotating bracket 1508 is symmetrically fixedly connected to the side of the groove 1502 away from the first rotating bracket 1507, a second shaft 1509 is connected to the second rotating bracket 1508, and the second shaft 1509 is rotatably connected to the second plate 1511. The second plate 1511 and the first plate 1505 are rotatably connected.

[0052] When the first plate 1505 is not rotated, the first plate 1505 is in the through groove 1504 and the depth of the through groove 1504 is equal to the thickness of the first plate 1505. When the second plate 1511 is not rotated, the second plate 1511 is in the groove 1502 and the depth of the groove 1502 is equal to the thickness of the second plate 1511. When the variable-caliber assembly 15 is not in use, the first plate 1505 and the second plate 1511 are both in the groove 1502, and the variable-caliber assembly 15 looks more beautiful as a whole.

[0053] In terms of installation: the bottom of the connecting plate 1501 away from the groove 1502 is provided with mounting points 1503 all around, and the position of the notch 16 is provided with a connection point corresponding to the mounting point 1503, and the mounting point 1503 and the connection point are fixedly connected to realize the installation of the variable-caliber component 15.

[0054] About the principle of variable caliber:

[0055] The second plate 1511 is provided with a plurality of engaging grooves 1512 at one end close to the first plate 1505, and a plurality of engaging protrusions 1506 are provided at the end of the first plate 1505. The engaging grooves 1512 engage with the engaging protrusions 1506, and the engaged grooves are evenly arranged from top to bottom. The end surface of the second plate 1511 away from the engaging grooves 1512 is provided with a friction surface 1513. When the second plate 1511 rotates, the engaging protrusions 1506 are inserted into different engaging grooves 1512, and the second plate 1511 exhibits different tilt angles to complete the caliber change, and the friction surface 1513 is in compression contact with the elastic rope 12. By inserting the engaging protrusions 1506 into different engaging grooves 1512, the second plate 1511 is at different tilt angles, thereby achieving the effect of the second plate 1511 on the caliber change of the inner wall of the placement groove 9.

[0056] At this time, the second plate 1511 first contacts the elastic rope 12, squeezes the elastic rope 12, and then acts on the egg 13. Compared with the second plate 1511 directly acting on the surface of the egg 13, the variable-caliber component 15 no longer directly contacts the surface of the egg 13, but contacts the elastic rope 12, squeezes the elastic rope 12, and then acts on the egg 13. The cooperation between the variable-caliber component 15 and the elastic rope 12 changes the hard contact with the egg 13 into a soft contact, thereby reducing the breakage rate of the egg 13.

[0057] Specific implementation process:

[0058] In the first step, the device requires manual labor. First, the eggs 13 are manually placed in the placement slot 9. All the eggs 13 are placed in the placement slot 9. Due to the gravity of the eggs 13, the elastic rope 12 is pulled and distributed around the eggs 13, which implements a preliminary restriction on the position of the eggs 13.

[0059] In the second step, a finger is manually inserted into the through groove 1504 from the position of the notch 16 to push the first plate 1505 to rotate. Then, as the angle of the first plate 1505 begins to deviate, the second plate 1511 rotates. Then, after the engaging groove 1512 engages with the engaging protrusion 1506, the second plate 1511 is tilted and fixed. The tilting direction of the second plate 1511 can change the inner diameter of the placement groove 9, so that the second plate 1511 contacts the elastic rope 12, giving the elastic rope 12 a squeezing force to act on the surroundings of the egg 13, and then the egg 13 is fixed.

[0060] The third step is to repeat the operation of the second step to load multiple egg box assemblies 5 with eggs 13, and then use the sliding rod 4 to put all the egg box assemblies 5 into the lower box 6, and then the lower ends of the eggs 13 contact the sponge pad 14, and the upper ends of the eggs 13 contact the sponge pad 14 in the upper egg box assembly 5 to achieve vertical fixation.

[0061] Finally, the upper cover 1 and the lower box 6 are combined to complete the transportation or portable movement of the eggs 13 after being boxed.

[0062] The device solves the problem that the egg 13 placement area in the traditional egg 13 boxing device cannot be changed in size, resulting in poor adaptability.

[0063] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any form. Although the present invention has been disclosed as a preferred embodiment as above, it is not used to limit the present invention. Any technical personnel in this field can make some changes or modify the technical contents disclosed above into equivalent embodiments without departing from the scope of the technical solution of the present invention. However, any brief modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. An egg boxing device, characterized in that: It comprises an upper cover, a lower box and an egg box assembly arranged in the lower box, and the egg box assembly slides into the lower box; The egg box assembly includes a mounting plate, a plurality of placement slots evenly arranged on the mounting plate for placing eggs, a plurality of elastic ropes arranged in the placement slots for initially limiting the inner diameter, and a matching assembly of matching elastic ropes; A plurality of notches are provided around the placement slot, and variable-caliber components are installed at the notches; The variable-caliber assembly includes a connecting plate fixed at the notch position, a first plate rotatably connected to the connecting plate, and a second plate rotatably connected to the connecting plate. The first plate and the second plate are detachably connected, and the second plate contacts the elastic rope after rotation.

2. The egg boxing equipment according to claim 1, characterized in that: The upper cover and the lower box are detachably connected, and also include a connecting assembly, through which the upper cover and the lower box are detachably connected. The connecting assembly includes a first connecting block fixedly connected to one side of the upper cover, a second connecting block fixedly connected to the lower box on the same side as the first connecting block, and connecting bolts, and the connecting bolts connect the first connecting block and the second connecting block.

3. The egg boxing equipment according to claim 1, characterized in that: A plurality of mounting grooves are provided around the inner bottom of the box body, and sliding rods are installed in the mounting grooves. The free ends of the sliding rods are in contact with the inner top of the upper cover, and the egg box components are slidably connected to the sliding rods, and the eggs are located between adjacent egg box components.

4. The egg boxing equipment according to claim 3, characterized in that: A connecting frame is arranged on the outer periphery of the mounting plate, and sliding holes are opened on the connecting frame, the number and position of which correspond to the sliding rods one by one, and the sliding rods slide in the sliding holes.

5. The egg boxing equipment according to claim 4, characterized in that: The mating component includes a flexible connecting plate fixed to the inner wall of the placement groove and arranged circumferentially, a contact pad and a sponge pad fixed to the bottom of the placement groove, the elastic rope is evenly arranged on the inner wall of the placement groove, one end of the elastic rope is connected to the flexible connecting plate, and the other end of the elastic rope is connected to the contact pad.

6. The egg boxing equipment according to claim 5, characterized in that: The bottom of the egg contacts the sponge pad located at the same position of the egg, and the top of the egg contacts the sponge pad in the egg box assembly located on the upper side under the action of the sliding rod.

7. An egg boxing device according to any one of claims 3 to 6, characterized in that: A groove is provided on the surface of the connecting plate, and a through groove is provided on one side of the groove. A first rotating bracket is symmetrically fixedly connected to one side of the through groove, and a first shaft is connected to the first rotating bracket, and the first shaft is rotatably connected to the first plate. A second rotating bracket is symmetrically fixedly connected to the side of the groove away from the first rotating bracket, and a second shaft is connected to the second rotating bracket, and the second shaft is rotatably connected to the second plate.

8. The egg boxing equipment according to claim 7, characterized in that: When the first plate is not rotated, the first plate is in the through groove and the depth of the through groove is equal to the thickness of the first plate. When the second plate is not rotated, the second plate is in the groove and the depth of the groove is equal to the thickness of the second plate.

9. The egg boxing equipment according to claim 8, characterized in that: The bottom of the connecting plate away from the groove is provided with mounting points all around, and the notch position is provided with connecting points corresponding to the mounting points, and the mounting points and the connecting points are fixedly connected.

10. The egg boxing equipment according to claim 8, characterized in that: The second plate is provided with a plurality of engaging grooves at one end close to the first plate, and a plurality of engaging protrusions are provided at the end of the first plate. The engaging grooves are engaged with the engaging protrusions, and the engaging grooves are evenly arranged from top to bottom. The end surface of the second plate away from the engaging grooves is provided with a friction surface. When the second plate rotates, the engaging protrusions are inserted into different engaging grooves, and the second plate shows different inclination angles to complete the variable caliber, and the friction surface is in extrusion contact with the elastic rope.