Transferring and conveying device for Eva luggage materials

Abstract

The invention discloses an Eva luggage material transferring and conveying device, and particularly relates to the technical field of conveying devices.The Eva luggage material transferring and conveying device comprises a conveying assembly and a ground, the conveying assembly is arranged at the upper end of the ground, a flattening assembly is arranged on the rear side of the upper portion of the conveying assembly, and an auxiliary assembly is arranged above the conveying assembly; and an adsorption assembly is arranged above the conveying assembly, a winding assembly is arranged above the conveying assembly, and a stacking assembly is jointly arranged on the front sides of the two rotating assemblies. According to the device, the pressure roller is matched with the pressing plate to flatten a slit EVA material, in the process that the EVA material is conveyed by the conveying belt, the auxiliary assembly can be matched with the adsorption assembly and the winding assembly to work cooperatively in sequence, and the purpose of stripping and winding a protective film in the transferring and conveying process is achieved; and through cooperation of the bearing plate and the like, when the EVA materials are borne, the EVA materials are stacked in a staggered mode, and the situation that the EVA materials topple over is prevented.

Description

Technical Field

[0001] The present invention relates to the technical field of conveying devices, and particularly to a transfer conveying device for Eva luggage materials. Background Art

[0002] In the luggage manufacturing industry, EVA materials are commonly used to make the outer shells, linings and shock-absorbing buffer components of luggage. Due to their good flexibility, resilience and impact resistance, they can effectively protect the items inside the box. EVA luggage materials are usually shipped in large rolls. At the same time, in order to protect the surface of the EVA material from scratches and contamination during transportation and storage, and to prevent the material from electrostatically adsorbing dust and other impurities, the manufacturer will cover a layer of protective film on one side of the EVA material. Before putting it into production, it needs to be cut into sheets suitable for processing luggage components by a slitting device first. Since internal stress will be generated during the winding process of the large roll of EVA material, the cut sheet material is prone to edge curling and uneven surface, which will not only affect the stable transportation of the material on the conveyor belt, but also cause dimensional deviations in subsequent processes such as stamping and hot pressing. Therefore, it is necessary to ensure that the material surface is flat and the edges are neat to provide a good basis for subsequent processing.

[0003] Chinese Patent Publication No. CN220702416U discloses a conveying device for LDPE foam boards, including: a main body unit, which includes a conveying device body, a connecting frame arranged on the outer surface of the right side of the conveying device body, and a foam board arranged on the upper surface of the conveying device body; a limiting unit, which includes a pulling plate arranged on the outer surface of the right side of the connecting frame, a telescopic shaft fixedly connected between the left outer surface of the pulling plate and the conveying device body, a plurality of fixed curved plates arranged on the outer surfaces of the front and rear sides of the conveying device body, and a rotating shaft arranged between the inner surfaces of the left and right fixed curved plates. Its beneficial effects are: through the mutual cooperation between the structures, the LDPE foam board during the conveying process can be effectively limited. Through the manual fixing and adjustment of the limiting structure, the limiting structure has high stability during use, so that the stability of the LDPE foam board during the conveying process is improved, and it is convenient to adjust the limiting structure. However, during the operation of the above device, it is impossible to achieve the effect of flattening the material during transmission to ensure its stable transportation and facilitating subsequent processing, and it is also impossible to achieve the purpose of treating the surface of the conveyed material during transportation. Summary of the Invention

[0004] The main purpose of the present invention is to provide a transfer conveying device for Eva luggage materials, which can effectively solve the problem that it is impossible to flatten the material during transmission and perform treatment steps such as film tearing on the surface of the conveyed material without damaging the material.

[0005] To achieve the above purpose, the technical solution adopted by the present invention is:

[0006] A transfer and conveying device for Eva luggage materials, comprising a conveying component and the ground. The conveying component is arranged at the upper end of the ground. A flattening component is arranged at the rear side above the conveying component. An auxiliary component is arranged above the conveying component. An adsorption component is arranged above the conveying component in front of the auxiliary component. A winding component is arranged above the conveying component in front of the adsorption component. Rotating components are arranged at the front parts of the left and right sides of the conveying component. A stacking component is jointly arranged in front of the two rotating components.

[0007] Preferably, the conveying component includes a driving shaft, a driving wheel is fixedly connected to the outer surface of the driving shaft, a conveyor belt is wound around the outer surface of the driving wheel, a driven wheel is wound around the inner surface of the conveyor belt at the front side, a driven shaft is fixedly connected to the inner surface of the driven wheel, and the driving shaft and the driven shaft are respectively rotatably connected to the upper end of the ground.

[0008] Preferably, the flattening component includes two rotating shafts I rotatably connected to the upper end of the ground. A pressure roller is jointly fixedly connected to one ends of the two rotating shafts I close to each other. A pressing plate is arranged at the upper end of the conveyor belt below the pressure roller.

[0009] Preferably, the auxiliary component includes a rotating shaft II drivingly connected to the outer surface of the driving shaft. A bidirectional lead screw is fixedly connected to the left end of the rotating shaft II. A sliding ring is arranged on the outer surface of the bidirectional lead screw. A guiding roller is slidably connected to the upper side of the left end of the sliding ring. U-shaped rods are symmetrically fixedly connected to the outer surface of the sliding ring.

[0010] Preferably, a fur brush is rotatably connected to the lower side of the rear end of the U-shaped rod at the front side. A silk brush is rotatably connected to the lower side of the front end of the U-shaped rod at the rear side. A rubber plate is arranged on the lower side of the outer surface of the fur brush. A glass plate is arranged on the lower side of the outer surface of the silk brush. An insulating plate is arranged between the lower side of the glass plate and the upper side of the outer surface of the fur brush.

[0011] Preferably, the adsorption component includes two limiting plates fixedly connected to the upper end of the ground. Limiting grooves are respectively opened on one sides of the two limiting plates close to each other. A rotating plate is rotatably connected to the front side of the inner surface of the limiting groove. An arc-shaped spring is jointly fixedly connected between the rear side of the rotating plate and the inner surface of the limiting groove. Hydraulic cylinders are fixedly connected to the rear ends of the two limiting plates. The output ends of the two hydraulic cylinders are respectively rotatably connected to a rotating rod I. A rectangular frame is jointly fixedly connected to one ends of the two rotating rods I close to each other. A plurality of suction cups are fixedly connected to the lower end of the rectangular frame. A vacuum pump is fixedly connected to one side of each of the plurality of suction cups. The outer surfaces of the two rotating rods I are respectively slidably connected to the inner surfaces of the adapted limiting grooves.

[0012] Preferably, the winding assembly includes two second rotating rods rotatably connected to the upper end of the ground. The outer surface of the left second rotating rod is drivingly connected to the driven shaft. The common fixed connection of the mutually approaching ends of the two second rotating rods is provided with a winding roller. The outer surfaces of the two second rotating rods are both drivingly connected to third rotating rods. The mutually approaching ends of the two third rotating rods are both fixedly connected with first eccentric wheels. The mutually approaching ends of the two first eccentric wheels are both provided with first limiting blocks. The lower ends of the two first limiting blocks are both fixedly connected with vertical rods. The common fixed connection of the lower ends of the two vertical rods is provided with a pressure infiltration plate.

[0013] Preferably, the rotating assembly includes a first rotating roller rotatably connected to the upper end of the ground. A speed change structure is arranged at the right end of the first rotating roller. The right end of the speed change structure is movably connected to the driven shaft. The left side of the outer surface of the first rotating roller is drivingly connected to a second rotating roller. A circular gear is fixedly connected to the right side of the outer surface of the second rotating roller. The right side of the outer surface of the first rotating roller is drivingly connected to a third rotating roller. An eccentric wheel is fixedly connected to the right end of the third rotating roller. A second limiting block is arranged at the right end of the eccentric wheel. A bent rod is fixedly connected to the front end of the second limiting block.

[0014] Preferably, the stacking assembly includes a plurality of telescopic rods fixedly connected to the upper end of the ground. The common fixed connection of the upper ends of the plurality of telescopic rods is provided with a fixing plate. A rectangular hole is opened in the middle of the upper end of the fixing plate. A U-shaped plate is slidably connected to the inner surface of the rectangular hole. A vertical plate is fixedly connected to the lower end of the U-shaped plate. Chutes are respectively opened at the left end and the right end of the vertical plate. The outer surfaces of the corresponding bent rods are respectively slidably connected to the two chutes. A receiving plate is movably connected to the mutually approaching sides of the vertical portions of the U-shaped plate.

[0015] Preferably, L-shaped rods are fixedly connected to the left end and the right end of the fixing plate. Rectangular blocks are arranged on the outer surfaces of the two L-shaped rods. Straight springs are fixedly connected to the lower ends of the two rectangular blocks. Rack bars are fixedly connected to the rear ends of the two L-shaped rods. The two rack bars are respectively meshed with the corresponding circular gears. Fixed blocks are respectively slidably connected to the front ends of the two rack bars.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] 1. Through the cooperation of the flattening component and the conveying component, the present invention can flatten the EVA material that may have warped edges after slitting, enabling it to be stably conveyed above the conveying component and avoiding conveying deviation. Meanwhile, during the process of conveying the slit EVA material by the conveying component in preparation for the next hot pressing, the power of the conveying component can also be utilized to cooperate with the auxiliary component, the adsorption component, and the winding component to lift and wind and tear off the protective film during the conveying process, avoiding the influence of the protective film on subsequent operations such as the hot pressing and forming of the EVA material. Additionally, the power of the conveying and the cooperation of two rotating components and the stacking component can be used to stack the conveyed EVA materials in a staggered manner to form a stable "well" - shaped structure, preventing the EVA materials from tipping over during stacking and transfer to the hot pressing operation, facilitating handling, and also preventing the materials from accumulating or falling in front of the conveyor belt.

[0018] 2. Through the cooperation of the pressure roller and the pressing plate, the present invention flattens the slit EVA material to ensure its stable conveyance on the conveyor belt. Also, through the coordinated action of the eccentric wheel II, the limit block II, the bending rod, and the vertical plate and other structures, during the process of the conveyor belt conveying the EVA material, it can not only drive the receiving plate to slowly and intermittently descend a certain distance but also make the receiving plate be driven to reciprocate back and forth, so that when the receiving plate receives the EVA material, the EVA materials of each layer are stacked in a staggered manner, ensuring that the centers of gravity of several layers of stacked EVA materials and the center of gravity of the receiving plate are always on the same plane. This can not only make the stacking of EVA materials more compact and stable but also reduce the risk of shaking and scattering during handling.

[0019] 3. Through the cooperation of structures such as the glass plate and the rubber plate, first, during the process of the conveyor belt conveying the EVA material, the electrostatic adsorption force between the protective film and the EVA material can be reduced. Then, when conveying the EVA material, through the cooperation of the rectangular frame and the suction cup and the operation of the winding roller, the protective film is lifted and wound up, effectively avoiding damage to the EVA material caused by film tearing during the transfer and conveying process. At the same time, the auxiliary component, the adsorption component, and the winding component cooperate with each other in sequence to achieve the purpose of peeling and winding the protective film during the transfer and conveying of the EVA material, making the entire conveying process smoother and more efficient, which is beneficial for the subsequent transfer and further processing of the EVA material. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 is the overall structural schematic diagram of the present invention;

[0021] Figure 2 is the overall internal structural schematic diagram of the present invention;

[0022] Figure 3 is the structural schematic diagram of the flattening component cooperating with the conveying component of the present invention;

[0023] Figure 4It is a schematic diagram of the auxiliary component structure of the present invention;

[0024] Figure 5 It is a schematic diagram of the partial structure of the auxiliary component of the present invention;

[0025] Figure 6 It is a schematic diagram of the structure of the adsorption component of the present invention;

[0026] Figure 7 It is a schematic diagram of the cross-sectional structure of the adsorption component of the present invention;

[0027] Figure 8 It is a schematic diagram of the structure of the winding assembly of the present invention;

[0028] Figure 9 It is a schematic diagram of the structure of the rotating assembly of the present invention;

[0029] Figure 10 It is a schematic diagram of the structure of the stacking assembly of the present invention;

[0030] Figure 11 It is a schematic diagram of the cross-sectional structure of the stacking assembly of the present invention.

[0031] In the figure: 1. conveying assembly; 11. driving shaft; 12. conveyor belt; 13. driven shaft; 2. flattening assembly; 21. rotating shaft 1; 22. pressure roller; 23. pressure plate; 3. auxiliary assembly; 31. rotating shaft 2; 32. bidirectional screw rod; 33. slip ring; 34. glass plate; 35. insulating plate; 36. rubber plate; 37. guide roller; 38. U-shaped rod; 39. silk brush; 310. fur brush; 4. adsorption assembly; 41. limit plate; 411. limit groove; 412. rotating plate; 413. arc spring; 42. hydraulic cylinder; 43. rotating rod 1; 44. rectangular frame; 45. suction cup; 451. vacuum pump; 5. winding assembly Parts; 51, rotating rod two; 52, winding roller; 53, rotating rod three; 54, eccentric wheel one; 55, limit block one; 56, vertical rod; 57, pressure seepage plate; 6, stacking assembly; 61, telescopic rod; 62, fixed block; 63, rack; 64, L-shaped rod; 641, straight spring; 642, rectangular block; 65, fixed plate; 651, rectangular hole; 66, receiving plate; 67, U-shaped plate; 68, vertical plate; 681, slide; 7, rotating assembly; 71, speed change structure; 72, rotating roller one; 73, rotating roller two; 74, circular gear; 75, rotating roller three; 76, eccentric wheel two; 77, limit block two; 78, bending rod; 8, ground. DETAILED DESCRIPTION

[0032] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further explained below in conjunction with specific implementation methods.

[0033] Embodiment 1, as Figure 1 andFigure 2 As shown in Figure 2 , a transfer and conveying device for Eva luggage materials includes a conveying assembly 1 and the ground 8. The conveying assembly 1 is arranged at the upper end of the ground 8. A flattening assembly 2 is arranged at the rear side above the conveying assembly 1. An auxiliary assembly 3 is arranged above the conveying assembly 1. An adsorption assembly 4 is arranged above the conveying assembly 1 in front of the auxiliary assembly 3. A winding assembly 5 is arranged above the conveying assembly 1 in front of the adsorption assembly 4. Rotating assemblies 7 are arranged at the front parts of the left and right sides of the conveying assembly 1. A stacking assembly 6 is arranged jointly at the front sides of the two rotating assemblies 7.

[0034] During transportation and storage, in order to protect the surface of the EVA material from scratches and contamination, and at the same time prevent the material from electrostatically adsorbing dust and other impurities, a protective film will be covered on the upper end of the EVA material. In the luggage production process, when the EVA material is cut and ready for hot pressing, compounding with other fabrics and other processing, this protective film will affect the bonding effect between the materials. Therefore, when the EVA material is ready for hot pressing after cutting, this layer of film needs to be torn off.

[0035] In the production process of the shock-proof layer of the luggage, the large roll of EVA material is cut into short strips by using the existing technology. Subsequently, the short strip-shaped EVA material is flattened by the cooperation of the conveying assembly 1 and the flattening assembly 2 to ensure that it is smoothly conveyed above the conveying assembly 1, avoiding the situation that the edge of the just-cut EVA material warps and causes conveying deviation.

[0036] Then, through the auxiliary cooperation of the auxiliary assembly 3, the electrostatic adsorption force between the upper end of the EVA material and the protective film is reduced. Furthermore, through the cooperation of the adsorption assembly 4 and the winding assembly 5, during the process of conveying the EVA material by the conveying assembly 1, the film on the four sides is first lifted up and then wound and torn off.

[0037] And after the protective film is torn off, through the cooperation of the conveying assembly 1, the two rotating assemblies 7 and the stacking assembly 6, the EVA materials are stacked in a staggered manner to form a stable "well" - shaped structure, preventing the EVA materials from toppling during stacking and transportation to the hot pressing operation.

[0038] During the operation of this embodiment, through the cooperation of the flattening assembly 2 and the conveying assembly 1, the EVA material that may have warped edges after being freshly cut can be flattened, enabling it to be stably conveyed above the conveying assembly 1, avoiding conveying deviation. Meanwhile, during the process of using the conveying assembly 1 to convey the cut EVA material in preparation for the next hot pressing step, the power of the conveying by the conveying assembly 1 can also be utilized to cooperate with the auxiliary assembly 3, the adsorption assembly 4, and the winding assembly 5 to lift and wind and tear off the protective film during the conveying process, avoiding the influence of the protective film on subsequent operations such as the hot pressing and forming of the EVA material. Additionally, the power of the conveying and the cooperation of two rotating assemblies 7 and the stacking assembly 6 can be used to stack the conveyed EVA materials in a staggered manner to form a stable "well" - shaped structure, preventing the EVA materials from tipping over during stacking and transfer to the hot pressing operation, facilitating handling, and also preventing the materials from piling up or falling on the front side of the conveyor belt 12.

[0039] Embodiment 2. Based on Embodiment 1, this embodiment aims to achieve the effect of flattening the EVA material while being able to stack the EVA materials in a staggered manner for temporary storage during the conveying process.

[0040] Refer to Figure 3 , the conveying assembly 1 includes a driving shaft 11. The outer surface of the driving shaft 11 is fixedly connected with a driving wheel. The outer surface of the driving wheel is wound and connected with a conveyor belt 12. The front side of the inner surface of the conveyor belt 12 is wound and connected with a driven wheel. The inner surface of the driven wheel is fixedly connected with a driven shaft 13. The driving shaft 11 and the driven shaft 13 are respectively rotatably connected to the upper end of the ground 8.

[0041] The above - mentioned driving shaft 11 is fixedly connected to a motor in the prior art. This motor is commonly used in the prior art, and the specific composition and working principle are not elaborated in detail in this solution. Meanwhile, by presetting the motor speed, the structures such as the driving shaft 11, the driving wheel, the conveyor belt 12, the driven shaft 13, and the driven wheel can convey the EVA material at an appropriate speed.

[0042] Refer to Figure 3 , the flattening assembly 2 includes two rotating shafts one 21 rotatably connected to the upper end of the ground 8. The outer surface of the left - hand rotating shaft one 21 is in transmission connection with the outer surface of the driving shaft 11. The mutually - approaching ends of the two rotating shafts one 21 are commonly fixedly connected with a pressure roller 22. A pressing plate 23 is arranged at the upper end of the conveyor belt 12 below the pressure roller 22.

[0043] In the above, the pressing plate 23 is fixedly connected to the upper end of the ground 8, and the pressing plate 23 is jointly composed of a horizontal plate and an arc - shaped plate. The left - hand rotating shaft one 21 and the driving shaft 11 are in gear - meshing transmission. While the driving shaft 11 rotates, the rotating shaft one 21 is driven to rotate.

[0044] When the motor rotates, it drives the driving shaft 11, the driven shaft 13 and the conveyor belt 12 to run. The driving shaft 11 rotates while driving the rotating shaft 21 and the pressure roller 22 to rotate at the same time, and then the EVA material just cut into short sheets is transmitted to the upper end of the horizontal part of the pressing plate 23. At this time, the rotating pressure roller 22 cooperates with the horizontal part of the pressing plate 23 to flatten the cut EVA material and continue to convey it forward.

[0045] The flat EVA material is helpful to improve the conveying efficiency and stability of the conveyor belt 12, and also helps in the subsequent operation of tearing off the film on the upper end of the EVA material.

[0046] See also Figure 9 The rotating assembly 7 includes a roller 1 72, which is rotatably connected to the upper end of the ground 8. A speed change structure 71 is provided at the right end of the roller 1 72, and the right end of the speed change structure 71 is movably connected to the driven shaft 13. The left side of the outer surface of the roller 1 72 is transmission-connected with a roller 2 73, and the right side of the outer surface of the roller 2 73 is fixedly connected with a circular gear 74. The right side of the outer surface of the roller 1 72 is transmission-connected with a roller 3 75, and the right end of the roller 3 75 is fixedly connected with an eccentric wheel 2 76. A limiting block 2 77 is provided at the right end of the eccentric wheel 2 76, and a bending rod 78 is fixedly connected to the front end of the limiting block 2 77.

[0047] A one-way rotating shaft is arranged between the above-mentioned roller 2 73 and the circular gear 74. The one-way rotating shaft is a conventional design in the prior art, and the specific composition and working principle are no longer elaborated in this scheme. When the roller 1 72 cooperates with the groove wheel to drive the roller 2 73 to rotate, the one-way rotating shaft and the circular gear 74 rotate at the same time. If the circular gear 74 reverses, the roller 2 73 will not rotate due to the setting of the one-way rotating shaft.

[0048] The above-mentioned speed change structure 71 is a common technical means in the prior art, which includes a speed change transmission mechanism, mainly including gears, shafts, synchronizers, etc. Gears can achieve different transmission ratios through different combinations, thereby changing the speed and torque. The specific working process and principle will not be elaborated in detail in this solution.

[0049] When the speed change structure 71 is running, the driven shaft 13 rotates several times before the roller 72 rotates one circle, and the rotation direction of the roller 72 is opposite to that of the driven shaft 13. In the process of transporting the EVA material using the conveyor belt 12, the short sheets of EVA material are placed at a certain distance for transportation. Every time the driven shaft 13 rotates several times, a sheet of EVA material is transported to the front side of the upper end of the conveyor belt 12 and is about to fall. At this time, the roller 72 rotates one circle and cooperates with the stacking component 6 to achieve the purpose of receiving the falling EVA material.

[0050] The above-mentioned transfer roller 1 72 and the transfer roller 2 73 are connected by a groove wheel in the prior art, so that the transfer roller 2 73 is driven to rotate one-fifth of a circle every time the transfer roller 1 72 rotates one circle.

[0051] The above-mentioned first transfer roller 72 and the third roller 75 are connected by belt pulleys with different radius ratios in the prior art, so that when the first transfer roller 72 rotates one circle, the third roller 75 rotates half a circle.

[0052] A sliding roller is fixedly connected to one side of the right end of the above-mentioned second eccentric wheel 76. When the second eccentric wheel 76 is driven to rotate around the axis of the third roller 75, the sliding roller also rotates around the axis of the third roller 75, and then cooperates with the second limiting block 77 to realize that when the second eccentric wheel 76 and the third roller 75 rotate, the second limiting block 77 and the bending rod 78 move forward and backward a certain distance.

[0053] Furthermore, when the EVA material is conveyed to the front side of the upper end of the conveyor belt 12, at this time, through the cooperation of the speed change structure 71, the first transfer roller 72 rotates one circle, and then through the cooperation of the grooved pulley, the second transfer roller 73 drives the circular gear 74 to rotate one-fifth of a circle. While the first transfer roller 72 rotates one circle, it drives the third roller 75 to rotate half a circle;

[0054] Furthermore, the third roller 75 drives the second eccentric wheel 76 to rotate half a circle. Through the cooperation and limitation of the second limiting block 77, the second limiting block 77 and the bending rod 78 move forward a certain distance at the same time.

[0055] Refer to Figure 10 and Figure 11 As shown in [relevant reference numbers], the stacking assembly 6 includes a plurality of telescopic rods 61 fixedly connected to the upper end of the ground 8. The upper ends of the plurality of telescopic rods 61 are fixedly connected together with a fixing plate 65. A rectangular hole 651 is opened in the middle of the upper end of the fixing plate 65. A U-shaped plate 67 is slidably connected to the inner surface of the rectangular hole 651. A vertical plate 68 is fixedly connected to the lower end of the U-shaped plate 67. Chute 681 is opened at the left end and the right end of the vertical plate 68, and the outer surfaces of the two chutes 681 are respectively slidably connected to the outer surface of the adapted bending rod 78. The mutually adjacent sides of the vertical portions of the U-shaped plate 67 are jointly movably connected with a receiving plate 66.

[0056] The above-mentioned receiving plate 66 and the U-shaped plate 67 are movably connected by a clamping method in the prior art. The U-shaped plate 67 can drive the receiving plate 66 to move forward, backward, up and down respectively, and can also release the locking of the U-shaped plate 67 on the receiving plate 66 to replace the receiving plate 66.

[0057] Further, when the first roller 72 cooperates with the speed-changing structure 71, when the first roller 72 rotates one circle, through the cooperation of the third roller 75 and the second eccentric wheel 76, the second limiting block 77 and the bending rod 78 move forward a certain distance. At this time, the two bending rods 78 cooperate with the inner surface of the sliding groove 681 to push the vertical plate 68 forward, so that the vertical plate 68 drives the U-shaped plate 67 to slide forward along the inner surface of the rectangular hole 651. The distance that the two bending rods 78 cooperate to push the vertical plate 68 and the U-shaped plate 67 forward is the same as the distance between the front end of the vertical part of the U-shaped plate 67 and the front side wall of the inner surface of the rectangular hole 651.

[0058] Immediately, during the movement of the U-shaped plate 67, it will drive the receiving plate 66 to move in the same direction. At this time, the sheet-shaped EVA material is conveyed by the conveyor belt 12 and falls onto the upper end of the receiving plate 66;

[0059] Furthermore, when the next EVA material is about to fall on the front side of the upper end of the conveyor belt 12, at this time, the first roller 72 rotates one circle again. Through the cooperation of the two bending rods 78 and the adapted sliding groove 681, the vertical plate 68, the U-shaped plate 67 and the receiving plate 66 are driven to move backward to the rear side wall of the inner surface of the rectangular hole 651. At this time, the next EVA material falls onto the upper end of the previous EVA material, and runs in this way repeatedly to realize the staggered stacking of each layer of EVA materials. Looking from the left or right, the staggered stacked EVA materials form a "well" structure layer by layer, so as to ensure that the center of gravity of several layers of stacked EVA materials is always on the same plane as the center of gravity of the receiving plate 66, avoiding the problem of the EVA materials tipping over during the stacking process, and also avoiding the phenomenon of tipping over when the stacked EVA materials are driven by the receiving plate 66 to be transferred to the next operation process subsequently.

[0060] Refer to Figure 10 Both the left end and the right end of the fixing plate 65 are fixedly connected with L-shaped rods 64. Rectangular blocks 642 are arranged on the outer surfaces of the two L-shaped rods 64. Straight springs 641 are fixedly connected to the lower ends of the two rectangular blocks 642. Rack bars 63 are fixedly connected to the rear ends of the two L-shaped rods 64. The two rack bars 63 are respectively engaged with the adapted circular gears 74. Fixed blocks 62 are slidably connected to the front ends of the two rack bars 63.

[0061] When the first roller 72 rotates one circle, it drives the second roller 73 and the circular gear 74 to rotate one-fifth of a circle. Immediately, when the circular gear 74 rotates one-fifth of a circle, it drives the rack bar 63 to slide downward along the fixed block 62 by a certain distance. At this time, the distance that the rack bar 63 is driven to descend is slightly greater than the thickness of the EVA material. At the same time, during the process of the rack bar 63 being driven to descend, the rack bar 63 drives the L-shaped rod 64 on the same side to descend simultaneously;

[0062] Furthermore, when the two L-shaped rods 64 descend a certain distance, they drive structures such as the fixed plate 65, the U-shaped plate 67, the receiving plate 66, and the vertical plate 68 to move downward simultaneously. Similarly, during the descent of the L-shaped rods 64, they will squeeze the straight springs 641 on the same side, causing the straight springs 641 to be compressed. When the fixed plate 65 is driven downward by the L-shaped rods 64, it will also squeeze a number of telescopic rods 61, causing them to be compressed;

[0063] Furthermore, it can be realized that when the driven shaft 13 rotates several circles and flattens and conveys an EVA material to the front side of the upper end of the conveyor belt 12, at this time, the first roller 72 cooperates with the second roller 73 and the third roller 75 respectively, so as to realize that every time the EVA material is about to fall, at this time, the receiving plate 66 is driven to descend a certain distance, and at the same time, the receiving plate 66 is driven by the U-shaped plate 67 to move forward or backward a certain distance, thereby realizing the effect that multiple EVA materials can be stacked in a staggered manner.

[0064] After a certain number of layers of EVA materials are stacked on the upper end of the receiving plate 66, several layers of EVA materials and the receiving plate 66 are transported together to the next hot pressing operation. Furthermore, a new receiving plate 66 is clamped on the inner surface of the rectangular hole 651, and at the same time, structures such as the rack 63 and a number of telescopic rods 61 that are compressed are reset to prepare for the stacking of the next batch of EVA materials.

[0065] During the reset process of the rack 63, the rack 63 is pulled upward, and at this time, the circular gear 74 is driven to rotate while the second roller 73 does not rotate.

[0066] Therefore, in this solution, the pressure roller 22 cooperates with the pressing plate 23 to flatten the cut EVA material to ensure the stable conveyance of the EVA material on the conveyor belt. Through the synergistic action of the eccentric wheel two 76, the limit block two 77, the bent rod 78, the vertical plate 68 and other structures, during the process of the conveyor belt 12 conveying the EVA material, it can not only drive the receiving plate 66 to descend slowly and intermittently by a certain distance, but also drive the receiving plate 66 to move back and forth reciprocally, so as to realize that when the receiving plate 66 receives the EVA material, the EVA materials of each layer are stacked in a staggered manner, ensuring that the centers of gravity of several layers of stacked EVA materials are always on the same plane as the center of gravity of the receiving plate 66. This can not only make the stacking of EVA materials more compact and stable, but also reduce the risk of shaking and scattering during the handling process.

[0067] Embodiment 3. On the basis of Embodiments 1 and 2, this embodiment aims to achieve the effect of tearing and winding up the protective film without damaging the EVA material during the process of conveying the EVA material.

[0068] Refer to Figure 4 and Figure 5, the auxiliary component 3 includes a second rotating shaft 31 drivingly connected to the outer surface of the driving shaft 11. A two-way lead screw 32 is fixedly connected to the left end of the second rotating shaft 31. A sliding ring 33 is arranged on the outer surface of the two-way lead screw 32. A guiding roller 37 is slidably connected to the upper side of the left end of the sliding ring 33. U-shaped rods 38 are symmetrically and fixedly connected to the outer surface of the sliding ring 33. The guiding roller 37 is fixedly connected to the upper end of the ground 8.

[0069] The above-mentioned driving shaft 11 and the second rotating shaft 31 are drivingly connected by pulleys with different radius ratios in the prior art, and the rotation speed of the second rotating shaft 31 is less than that of the driving shaft 11.

[0070] After the EVA material flattened by the cooperation of the pressure roller 22 and the pressing plate 23 rotates and slides along the inclined part of the pressing plate 23 to the upper end of the conveyor belt 12, the conveyor belt 12 drives the EVA material to continue to move forward to convey the EVA material. During the rotation of the second rotating shaft 31, the two-way lead screw 32 will be driven to rotate simultaneously. During the rotation of the two-way lead screw 32, through the cooperation with the guiding roller 37, the sliding ring 33 drives the two U-shaped rods 38 to slide left and right along the guiding roller 37 simultaneously.

[0071] Refer to Figure 5 , a fur brush 310 is rotatably connected to the lower side of the rear end of the front U-shaped rod 38, and a silk brush 39 is rotatably connected to the lower side of the front end of the rear U-shaped rod 38. A rubber plate 36 is arranged on the lower side of the outer surface of the fur brush 310, a glass plate 34 is arranged on the lower side of the outer surface of the silk brush 39, and an insulating plate 35 is arranged between the lower side of the glass plate 34 and the upper side of the outer surface of the fur brush 310.

[0072] The bristles of the above-mentioned silk brush 39 are made of silk material commonly used in the prior art. By rubbing the silk bristles on the outer surface of the silk brush 39 against the glass plate 34 back and forth, the surface of the glass plate 34 can carry positive charges. The bristles of the above-mentioned fur brush 310 are made of animal fur commonly used in the prior art. By rubbing the fur brush 310 against the upper end of the rubber plate 36 back and forth, the upper end of the rubber plate 36 can carry negative charges; and a number of U-shaped metal rings are arranged around the above-mentioned glass plate 34, rubber plate 36 and insulating plate 35, and multiple points electrically connected to the ground 8 are arranged on the U-shaped metal rings arranged on the four sides of the glass plate 34, rubber plate 36 and insulating plate 35.

[0073] Before conveying the EVA material, first use a silk cloth and a fur cloth to rub the glass plate 34 and the rubber plate 36 respectively, so that the upper ends of the glass plate 34 and the rubber plate 36 carry charges respectively. Furthermore, during the process of conveying the EVA material by the conveyor belt 12, the second rotating shaft 31 rotates, so that the sliding ring 33 drives the two U-shaped rods 38, the silk brush 39 and the fur brush 310 to move left and right reciprocally at the same time. During the movement, the upper end of the rubber plate 36 is in close contact with the surface of the fur brush 310, and the upper end of the glass plate 34 is in close contact with the surface of the silk brush 39, so that the upper ends of the glass plate 34 and the rubber plate 36 continuously carry charges.

[0074] The material of the above-mentioned insulating plate 35 is polytetrafluoroethylene commonly used in the prior art. Through the cooperation of the insulating plate 35, the glass plate 34 and the rubber plate 36 are physically isolated to prevent charge neutralization caused by their direct contact. At the same time, the positive and negative electric fields of the electrostatic fields generated by the glass plate 34 and the rubber plate 36 respectively after carrying charges are separated in space through the cooperation of the insulating plate 35 to form a composite electric field gradient.

[0075] When the EVA material is conveyed forward by the conveyor belt 12 and moves below the rubber plate 36, due to the action of the electric field force, the electrostatic adsorption force between the protective film layer and the EVA material is reduced, further enhancing the effect of protective film peeling.

[0076] Refer to Figure 6 and Figure 7 As shown in, the adsorption assembly 4 includes two limiting plates 41 fixedly connected to the upper end of the ground 8. Limiting grooves 411 are provided on the side of the two limiting plates 41 close to each other. A rotating plate 412 is rotatably connected to the front side of the inner surface of the limiting groove 411. An arc-shaped spring 413 is fixedly connected between the rear side of the rotating plate 412 and the inner surface of the limiting groove 411. Hydraulic cylinders 42 are fixedly connected to the rear ends of the two limiting plates 41. The output ends of the two hydraulic cylinders 42 are rotatably connected to a first rotating rod 43. A rectangular frame 44 is fixedly connected to one end of the two first rotating rods 43 close to each other. A plurality of suction cups 45 are fixedly connected to the lower end of the rectangular frame 44. A vacuum pump 451 is fixedly connected to one side of each of the plurality of suction cups 45. The outer surfaces of the two first rotating rods 43 are respectively slidably connected to the inner surfaces of the adapted limiting grooves 411.

[0077] The above-mentioned vacuum pump 451 is a conventional design in the prior art. When it operates normally, it cooperates with the adapted suction cup 45 to realize the adsorption of the adjacent sealed space to a near-vacuum state.

[0078] A baffle is provided on the same side of the arc-shaped spring 413 as the rotating plate 412 and on the inner surface of the limiting groove 411. The baffle cooperates with the arc-shaped spring 413 to enable the rotating plate 412 to rotate axially around the connection with the limiting groove 411 but not to rotate downward.

[0079] After the EVA material has been subjected to the action of the composite electrostatic field, it is continuously conveyed forward by the conveyor belt 12. When the EVA material is conveyed below the rectangular frame 44, the hydraulic cylinder 42 is activated. Immediately, the output end of the hydraulic cylinder 42 obliquely pushes down the first rotating rod 43. Further, the two first rotating rods 43 cooperate to drive the rectangular frame 44 and a number of suction cups 45 to move simultaneously. During the movement of the two first rotating rods 43, the first rotating rod 43 slides along the inner surface of the rear inclined part of the same-side limiting groove 411. When the first rotating rod 43 is exactly pushed to the inner surface of the horizontal part of the limiting groove 411, at this time, the rectangular frame 44 drives a number of suction cups 45 to closely adhere to the upper end of the EVA material, and the four sides of the rectangular frame 44 are respectively aligned with the EVA material.

[0080] Furthermore, the first rotating rod 43 is pushed to drive the rectangular frame 44 and a number of suction cups 45 to continue sliding forward along the inner surface of the horizontal part of the limiting groove 411. At the same time, a number of vacuum pumps 451 are activated, and then the suction cups 45 and the protective film of the EVA material are directly pumped to a near-vacuum state. During the cooperative operation of the vacuum pumps 451, the EVA material and the protective film are gradually separated.

[0081] During the operation of a number of vacuum pumps 451, by presetting the adsorption intensity of the vacuum pumps 451 in advance, the protective film is slowly separated from the EVA material.

[0082] Before the first rotating rod 43 is about to be pushed to the front side of the inner surface of the horizontal part of the limiting groove 411, the first rotating rod 43 will push up the rotating plate 412 during the movement, so that the rotating plate 412 rotates upward around the axis rotatably connected to the inner surface of the limiting groove 411 and stretches the arc-shaped spring 413. When the first rotating rod 43 is pushed to the front side of the inner surface of the horizontal part of the limiting groove 411, at this time, the rotating plate 412 is no longer pushed up and squeezed, and then the stretched arc-shaped spring 413 resets to drive the rotating plate 412 to return to its original state. At the same time, a number of vacuum pumps 451 cooperate with the suction cups 45 to release the electrostatic adsorption between the upper end of the EVA material and the protective film; then, the output end of the hydraulic cylinder 42 drives the first rotating rod 43 to move backward along the inner surface of the front inclined part of the limiting groove 411.

[0083] When the first rotating rod 43 is driven to move backward, the rotating plate 412 cooperates with the baffle plate to make the first rotating rod 43 can only slide backward along the inner surface of the front inclined part of the limiting groove 411. Further, it will drive the rectangular frame 44 and a number of suction cups 45 to move obliquely backward and upward. Immediately, a number of vacuum pumps 451 stop running. During the backward and upward movement of the rectangular frame 44 and a number of vacuum pumps 451, the protective film at the front side of the upper end of the EVA material is lifted, which is convenient for directly tearing off the protective film subsequently. At the same time, the adsorption lock between the positions of the four sides of the upper end of the EVA material and the protective film is also released.

[0084] Refer to Figure 8, the rewinding assembly 5 includes two second rotating rods 51 rotatably connected to the upper end of the ground 8. A winding roller 52 is fixedly connected to the mutually approaching ends of the two second rotating rods 51. The outer surfaces of the two second rotating rods 51 are both drivingly connected to a third rotating rod 53. A first eccentric wheel 54 is fixedly connected to each of the mutually approaching ends of the two third rotating rods 53. A first limiting block 55 is arranged at each of the mutually approaching ends of the two first eccentric wheels 54. A vertical rod 56 is fixedly connected to the lower end of each of the two first limiting blocks 55. A pressure infiltration plate 57 is fixedly connected to the lower ends of the two vertical rods 56. The outer surface of the left second rotating rod 51 is drivingly connected to the outer surface of the first rotating roller 72.

[0085] The pressure infiltration plate 57 is internally filled with an adhesive. This adhesive is a fluororubber adhesive commonly used in the prior art to coat the surface of a roller to adhere materials such as a protective film and will not adhere to EVA materials. It can be coated on the surface of the winding roller 52, thereby achieving sticking of the protective film in a relatively short time.

[0086] The second rotating rod 51 and the third rotating rod 53 on the same side are connected by belt pulleys with different radius ratios in the prior art, and the rotation speed of the third rotating rod 53 is faster than that of the second rotating rod 51.

[0087] The second rotating rod 51 and the first rotating roller 72 are connected by a belt pulley in the prior art.

[0088] The working principle of the first eccentric wheel 54 cooperating with the first limiting block 55 and the vertical rod 56 is the same as that of the second eccentric wheel 76 cooperating with the second limiting block 77 and the bending rod 78, and the specific details of this solution will not be elaborated in detail here.

[0089] When the driving shaft 11, the conveyor belt 12, and the driven shaft 13 cooperate to convey the EVA material, the rotation of the driven shaft 13 will drive the second rotating rod 51 to continuously rotate, and then the winding roller 52 will rotate simultaneously.

[0090] During the rotation of the winding roller 52 and the two second rotating rods 51, the two third rotating rods 53 will be driven to rotate simultaneously. Then, when the third rotating rod 53 rotates, through the cooperation with the first eccentric wheel 54 and the first limiting block 55, the vertical rod 56 will move reciprocally up and down, and at the same time, the pressure infiltration plate 57 will be driven to move reciprocally up and down.

[0091] When the pressure infiltration plate 57 is driven to move downward to the lowest position, at this time, the pressure infiltration plate 57 is in a tightly pressed state against the surface of the winding roller 52 by the cooperation of the two vertical rods 56. Then, the adhesive filled inside the pressure infiltration plate 57 will be smeared on the surface of the winding roller 52. At the same time, since the rotation speed of the third rotating rod 53 is faster than that of the second rotating rod 51, the two vertical rods 56 will quickly drive the pressure infiltration plate 57 to move up and down, thereby smearing the adhesive at different positions on the surface of the winding roller 52, so as to achieve smearing of the adhesive at different positions on the surface of the winding roller 52 and the winding roller 52 is driven to continuously rotate.

[0092] The EVA material with the upper protective film lifted by several suction cups 45 in cooperation with a vacuum pump 451, when being conveyed by a conveyor belt 12 to below a winding roller 52, the winding roller 52 adheres to the lifted protective film through the adhesive on its surface, and winds the protective film around the outer surface of the winding roller 52 during the rotation of the winding roller 52. At the same time, an infiltration plate 57 continues to coat the adhesive on the outer surface of the winding roller 52. During the process of the winding roller 52 winding the protective film, the adhesive is coated on the surface of the protective film, which can not only adhere to the un-wound protective film, but also ensure that the wound protective film remains in a tightly attached state, facilitating subsequent processing.

[0093] Immediately, the EVA material with the protective film torn off is continuously conveyed by the conveyor belt 12 to the front side above the conveyor belt 12, and is received and stacked by a receiving plate 66, ready to be transported to the next operation step.

[0094] Therefore, through the cooperation of structures such as a glass plate 34 and a rubber plate 36 in this solution, first, the electrostatic adsorption force between the protective film and the EVA material can be reduced during the process of the conveyor belt 12 conveying the EVA material. Immediately, when conveying the EVA material, through the cooperation of a rectangular frame 44 and suction cups 45 and the operation of the winding roller 52, the protective film is lifted and wound up, effectively avoiding damage to the EVA material caused by film tearing during the transfer and transportation process. At the same time, the auxiliary component 3 cooperates with the adsorption component 4 and the winding component 5 to work together in sequence, achieving the purpose of peeling and winding the protective film during the transfer and transportation of the EVA material, making the entire conveying process smoother and more efficient, and being beneficial to the subsequent transfer and further processing of the EVA material.

[0095] It should be specifically noted that the specific installation method, circuit connection method, and control method of the hydraulic cylinder 42 adopted in the present invention are all conventional designs, and the present invention will not elaborate in detail.

[0096] The above shows and describes the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. What is described in the above embodiments and the specification only illustrates the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed. The scope of protection claimed by the present invention is defined by the appended claims and their equivalents.

Claims

1. A transfer and conveying device for Eva luggage materials, comprising a conveying assembly (1) and the ground (8), characterized in that: A conveying assembly (1) is provided at the upper end of the ground (8). A flattening assembly (2) is provided at the rear side above the conveying assembly (1). An auxiliary assembly (3) is provided above the conveying assembly (1). An adsorption assembly (4) is provided above the conveying assembly (1) at the front side of the auxiliary assembly (3). A winding assembly (5) is provided above the conveying assembly (1) at the front side of the adsorption assembly (4). Rotating assemblies (7) are provided at the front parts of the left and right sides of the conveying assembly (1). A stacking assembly (6) is provided at the front side of the two rotating assemblies (7).

2. The transfer and conveying device for an Eva luggage material according to claim 1, characterized in that: The conveying assembly (1) includes a driving shaft (11). A driving wheel is fixedly connected to the outer surface of the driving shaft (11). A conveyor belt (12) is wound around the outer surface of the driving wheel. A driven wheel is wound around the inner surface of the conveyor belt (12) at the front side. A driven shaft (13) is fixedly connected to the inner surface of the driven wheel. The driving shaft (11) and the driven shaft (13) are respectively rotatably connected to the upper end of the ground (8).

3. The transfer and conveying device for an Eva luggage material according to claim 2, characterized in that: The flattening assembly (2) includes two rotating shafts one (21) rotatably connected to the upper end of the ground (8). The outer surface of the rotating shaft one (21) on the left side is in transmission connection with the outer surface of the driving shaft (11). A pressure roller (22) is fixedly connected to the common end of the two rotating shafts one (21) close to each other. A pressing plate (23) is provided at the upper end of the conveyor belt (12) below the pressure roller (22).

4. The transfer and conveying device for an Eva luggage material according to claim 2, characterized in that: The auxiliary assembly (3) includes a rotating shaft two (31) in transmission connection with the outer surface of the driving shaft (11). A bidirectional lead screw (32) is fixedly connected to the left end of the rotating shaft two (31). A sliding ring (33) is provided on the outer surface of the bidirectional lead screw (32). A guiding roller (37) is slidably connected to the upper side of the left end of the sliding ring (33). U-shaped rods (38) are symmetrically fixedly connected to the outer surface of the sliding ring (33).

5. The transfer and conveying device for an Eva luggage material according to claim 4, characterized in that: A fur brush (310) is rotatably connected to the lower side of the rear end of the U-shaped rod (38) at the front side. A silk brush (39) is rotatably connected to the lower side of the front end of the U-shaped rod (38) at the rear side. A rubber plate (36) is provided on the lower side of the outer surface of the fur brush (310). A glass plate (34) is provided on the lower side of the outer surface of the silk brush (39). An insulating plate (35) is provided between the lower side of the glass plate (34) and the upper side of the outer surface of the fur brush (310).

6. The transfer and conveying device for an Eva luggage material according to claim 1, characterized in that: The adsorption assembly (4) comprises two limit plates (41) fixedly connected to the upper end of the ground (8); a limit groove (411) is provided on one side of the two limit plates (41) close to each other; a rotating plate (412) is rotatably connected to the front side of the inner surface of the limit groove (411); an arc spring (413) is fixedly connected between the rear side of the rotating plate (412) and the inner surface of the limit groove (411); a hydraulic cylinder (42) is fixedly connected to the rear ends of the two limit plates (41); a rotating rod (43) is rotatably connected to the output ends of the two hydraulic cylinders (42); a rectangular frame (44) is fixedly connected to one end of the two rotating rods (43) close to each other; a plurality of suction cups (45) are fixedly connected to the lower end of the rectangular frame (44); a vacuum pump (451) is fixedly connected to one side of the plurality of suction cups (45); and the outer surfaces of the two rotating rods (43) are respectively slidably connected to the inner surfaces of the matching limit grooves (411).

7. The transfer and conveying device for an Eva luggage material according to claim 2, characterized in that: The winding assembly (5) comprises two rotating rods (51) rotatably connected to the upper end of the ground (8); the two rotating rods (51) are mutually close to one end and are commonly fixedly connected to a winding roller (52); the outer surfaces of the two rotating rods (51) are both transmission-connected to a rotating rod (53); the two rotating rods (53) are mutually close to one end and are both fixedly connected to an eccentric wheel (54); the two eccentric wheels (54) are mutually close to one end and are both provided with a limiting block (55); the lower ends of the two limiting blocks (55) are both fixedly connected to a vertical rod (56); the lower ends of the two vertical rods (56) are commonly fixedly connected to a pressure seepage plate (57).

8. The transfer and conveying device for an Eva luggage material according to claim 2, characterized in that: The rotating assembly (7) comprises a first roller (72), the first roller (72) being rotatably connected to the upper end of the ground (8), a speed change structure (71) being arranged at the right end of the first roller (72), the right end of the speed change structure (71) being movably connected to the driven shaft (13), the left side of the outer surface of the first roller (72) being transmission-connected to the second roller (73), the right side of the outer surface of the second roller (73) being fixedly connected to a circular gear (74), the right side of the outer surface of the first roller (72) being transmission-connected to the third roller (75), the right end of the third roller (75) being fixedly connected to the second eccentric wheel (76), the right end of the second eccentric wheel (76) being provided with a second limit block (77), the front end of the second limit block (77) being fixedly connected to a bending rod (78).

9. The transfer and conveying device for an Eva luggage material according to claim 8, characterized in that: The stacking assembly (6) comprises a plurality of telescopic rods (61) fixedly connected to the upper end of the ground (8); the upper ends of the plurality of telescopic rods (61) are commonly fixedly connected to a fixing plate (65); a rectangular hole (651) is provided in the middle of the upper end of the fixing plate (65); a U-shaped plate (67) is slidably connected to the inner surface of the rectangular hole (651); a vertical plate (68) is fixedly connected to the lower end of the U-shaped plate (67); a sliding groove (681) is provided at the left and right ends of the vertical plate (68); the two sliding grooves (681) are respectively slidably connected to the outer surfaces of the matching bending rods (78); and the vertical parts of the U-shaped plate (67) are mutually close to one side and are commonly movably connected to a receiving plate (66).

10. The transfer and conveying device for an Eva luggage material according to claim 9, characterized in that: The left and right ends of the fixed plate (65) are both fixedly connected with L-shaped rods (64). Rectangular blocks (642) are arranged on the outer surfaces of the two L-shaped rods (64). Straight springs (641) are fixedly connected to the lower ends of the two rectangular blocks (642). The rear ends of the two L-shaped rods (64) are both fixedly connected with racks (63). The two racks (63) are respectively engaged with matching circular gears (74). Fixed blocks (62) are slidably connected to the front ends of the two racks (63).

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