Corrugated board hot-pressing laminating device

Abstract

The utility model discloses a corrugated board hot-pressing laminating device, which relates to the technical field of hot-pressing laminating and comprises an operation table assembly, a hot-pressing mechanism, a moving mechanism and a collecting and arranging mechanism, and the collecting and arranging mechanism comprises a collecting frame, a sliding groove, a second motor, a screw rod, a sliding arranging plate, a transverse arranging groove, a telescopic motor, a transverse arranging plate and a spring. According to the utility model, the collection and arrangement mechanism is arranged, so that the corrugated boards can slide into the collection frame through the guide plate after thermal lamination, and the corrugated boards are automatically arranged through the movement of the sliding arrangement plate and the transverse arrangement plate; the situation that an operator is hurt due to the fact that the operator manually takes down the high-temperature corrugated boards subjected to hot-pressing attachment is avoided, the operator does not need to manually arrange the corrugated boards, the workload of the operator is reduced, and meanwhile the working efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of hot pressing and laminating, in particular to a hot pressing and laminating device for corrugated paperboard. Background Art

[0002] Corrugated cardboard is a board-shaped material made by gluing noodle paper and corrugated cardboard formed by corrugating rollers. It is generally divided into two categories: single corrugated cardboard and double corrugated cardboard. According to the size of the corrugation, it is divided into five types: A, B, C, E, and F. The invention and application of corrugated cardboard has a history of more than 100 years. It has the advantages of low cost, light weight, easy processing, high strength, excellent printing adaptability, and convenient storage and transportation. More than 80% of corrugated cardboard can be recycled. Corrugated cardboard can be used as packaging for food or digital products. It is relatively environmentally friendly and widely used.

[0003] The utility model patent with patent application publication number CN 215040807 U discloses a corrugated cardboard hot-pressing laminating device for preventing warping, comprising a conveying assembly, a supporting assembly and a hot-pressing assembly, wherein the supporting assembly is arranged at one side of the conveying assembly, the top of the supporting assembly is connected to the hot-pressing assembly, and the output end of the conveying assembly is connected to the output assembly; the hot-pressing assembly is used for hot-pressing laminating the corrugated cardboard, comprising a hot-pressing plate, the hot-pressing plate is connected to a lifting member for controlling the lifting of the hot-pressing plate, in the utility model, when the lifting member drives the hot-pressing plate to approach the corrugated cardboard, the pressing plate will contact the corrugated cardboard in advance, so as to avoid the hot-pressing plate area being too large during descent, driving the air flow above the corrugated cardboard to cause the board surface of the corrugated cardboard to be laminated to be misaligned, when the hot-pressing plate leaves the corrugated cardboard, the pressing plate can continue to press the corrugated cardboard under the force of the compressed spring, so as to prevent the heated hot-pressing plate from driving the top board surface of the corrugated cardboard to move when leaving the corrugated cardboard, and prevent the board surface from warping after hot-pressing, thereby improving the effect of hot-pressing laminating.

[0004] However, the above device still has some disadvantages in actual use. The most obvious one is that after the device heat-bonds the corrugated cardboard, the operator is required to manually take out the bonded corrugated cardboard. At this time, the surface temperature of the corrugated cardboard after heat-bonding is high, which is easy to cause harm to the operator. In addition, the device requires the operator to manually collect the bonded corrugated cardboard, and the operator is also required to manually sort and align the stacked corrugated cardboard before moving it. It is very inconvenient to use, which increases the workload of the operator and reduces production efficiency.

[0005] Therefore, it is necessary to invent a corrugated cardboard hot pressing bonding device to solve the above problems. Utility Model Content

[0006] The utility model aims to provide a corrugated cardboard hot pressing bonding device, which solves the problems in the above-mentioned background technology that the device requires an operator to manually take out the bonded corrugated cardboard after hot bonding the corrugated cardboard, which may cause harm to the operator, and requires the operator to manually align the stacked corrugated cardboard before carrying it, which is very inconvenient to use.

[0007] According to one aspect of the present disclosure, the following technical solution is provided: a corrugated paperboard hot pressing laminating device, comprising:

[0008] An operating table assembly, the operating table assembly comprising a support plate;

[0009] A heat pressing mechanism, which is used for heat laminating the corrugated paperboard;

[0010] A moving mechanism, the moving mechanism is used for transferring corrugated cardboard; and

[0011] A collecting and sorting mechanism, the collecting and sorting mechanism includes a collecting frame, a sliding groove, a second motor, a screw rod, a sliding sorting plate, a transverse sorting groove, a telescopic motor, a transverse sorting plate and a spring, the collecting frame is slidably connected to the top of the moving mechanism, the sliding groove is opened on the upper surface of the collecting frame, the second motor is fixedly connected to the outside of the collecting frame, one end of the screw rod is fixedly connected to the output end of the second motor and is located inside the sliding groove, the other end of the screw rod is rotatably connected to the collecting frame through a bearing, the bottom of the sliding sorting plate is threadedly connected to the screw rod and is located above the collecting frame, the transverse sorting groove is opened on the surface of the collecting frame and passes through the collecting frame, the telescopic motor is fixedly installed on the outside of the support frame close to the side of the collecting and sorting mechanism, the transverse sorting plate is fixedly connected to the outside of the telescopic motor, and the spring is fixedly connected to the top of the collecting frame.

[0012] According to the corrugated cardboard hot pressing laminating device of at least one embodiment of the present disclosure, the operating table assembly also includes an operating table body, a first side plate, a first motor, a conveyor belt, a mounting plate, a second side plate and a guide plate.

[0013] According to at least one embodiment of the corrugated cardboard hot pressing bonding device disclosed herein, the first side plate is fixedly installed above both sides of the operating table body, the first motor is fixedly connected to the outside of the first side plate, the conveyor belt is fixedly connected to the output end of the first motor and is rotatably connected to the first side plate, the mounting plate is fixedly connected to the top of the operating table body and located outside the first side plate, the second side plate is fixedly connected to one end of the first side plate, the guide plate is fixedly connected to the second side plate and located outside the operating table body, and the support plate is fixedly connected below the operating table body.

[0014] According to at least one embodiment of the corrugated cardboard hot pressing laminating device disclosed herein, the hot pressing mechanism includes a hydraulic cylinder, a connecting plate, a hot pressing plate, a fixed sleeve rod and a sliding rod, the hydraulic cylinder is fixedly connected to the top of the mounting plate, the connecting plate is fixedly connected to the bottom of the hydraulic cylinder, the hot pressing plate is fixedly connected to the bottom of the connecting plate, the fixed sleeve rod is fixedly sleeved above the connecting plate and the hydraulic plate, and the sliding rod is elastically connected to the fixed sleeve rod and slidably sleeved inside the fixed sleeve rod.

[0015] According to at least one embodiment of the corrugated cardboard hot pressing laminating device disclosed herein, the moving mechanism includes a U-shaped frame, a fixed vertical rod, a top plate, a push handle and a universal wheel, the fixed vertical rod is fixedly connected to the top of the U-shaped frame, the fixed vertical rod is slidably connected to the collecting frame, the top plate is fixedly connected to the top of the fixed vertical rod, one end of the spring is fixedly connected to the bottom of the top plate, the push handle is fixedly connected to the outside of the fixed vertical rod, and the universal wheel is fixedly connected to the bottom of the U-shaped frame.

[0016] Technical effects and advantages of the utility model:

[0017] The utility model provides an operating table component with a guide plate and a collecting and sorting mechanism with a collecting rack, a sliding sorting plate and a transverse sorting plate, so that after the corrugated cardboard is heat-bonded, it can slide into the collecting rack through the guide plate, and the corrugated cardboard can be automatically sorted by moving the sliding sorting plate and the transverse sorting plate, thereby avoiding the operator from being hurt by manually removing the high-temperature corrugated cardboard after heat-bonding, and avoiding the operator from manually sorting the corrugated cardboard, reducing the operator's workload and improving work efficiency.

[0018] The utility model is provided with a moving mechanism with a push handle and universal wheels, so that an operator can drive the universal wheels to rotate by pushing the push handle and carry the collected and sorted corrugated cardboards, which is more convenient and quick to use, avoids manual carrying by the operator and further improves work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The accompanying drawings illustrate exemplary embodiments of the present disclosure and together with the description serve to explain the principles of the present disclosure. These drawings are included to provide a further understanding of the present disclosure and are incorporated in and constitute a part of this specification.

[0020] Figure 1 It is a front view of the overall structure of a corrugated cardboard hot pressing laminating device according to one embodiment of the present disclosure.

[0021] Figure 2 It is a schematic diagram of the overall structure of a corrugated cardboard hot pressing laminating device according to one embodiment of the present disclosure.

[0022] Figure 3It is a schematic structural diagram of an operating table assembly of a corrugated cardboard hot pressing laminating device according to one embodiment of the present disclosure.

[0023] Figure 4 It is a schematic diagram of the structure of a heat pressing mechanism of a corrugated cardboard heat pressing laminating device according to one embodiment of the present disclosure.

[0024] Figure 5 It is a schematic diagram of the structure of the moving mechanism of the corrugated cardboard hot pressing bonding device according to one embodiment of the present disclosure.

[0025] Figure 6 It is a schematic diagram of the structure of a collecting and sorting mechanism of a corrugated cardboard hot pressing laminating device according to one embodiment of the present disclosure.

[0026] The specific reference numerals in the figure are:

[0027] 1. Operation table assembly; 11. Operation table body; 12. First side plate; 13. First motor; 14. Conveyor belt; 15. Mounting plate; 16. Second side plate; 17. Guide plate; 18. Support plate;

[0028] 2. Hot pressing mechanism; 21. Hydraulic cylinder; 22. Connecting plate; 23. Hot pressing plate; 24. Fixed sleeve rod; 25. Sliding rod;

[0029] 3. Moving mechanism; 31. U-shaped frame; 32. Fixed vertical rod; 33. Top plate; 34. Push handle; 35. Universal wheel;

[0030] 4. Collecting and sorting mechanism; 41. Collecting rack; 42. Sliding slot; 43. Second motor; 44. Screw rod; 45. Sliding sorting plate; 46. Horizontal sorting slot; 47. Telescopic motor; 48. Horizontal sorting plate; 49. Spring. DETAILED DESCRIPTION

[0031] The present disclosure is further described in detail below in conjunction with the accompanying drawings and implementations. It is understood that the specific implementations described herein are only used to explain the relevant content, rather than to limit the present disclosure. It should also be noted that, for ease of description, only the parts related to the present disclosure are shown in the accompanying drawings.

[0032] It should be noted that, in the absence of conflict, the embodiments and features of the embodiments in the present disclosure can be combined with each other. The technical solution of the present disclosure will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0033] Unless otherwise specified, the exemplary embodiments / embodiments shown will be understood as providing exemplary features of various details of some ways in which the technical concept of the present disclosure can be implemented in practice. Therefore, unless otherwise specified, the features of the various embodiments / embodiments can be combined, separated, interchanged and / or rearranged without departing from the technical concept of the present disclosure.

[0034] The use of cross-hatching and / or shading in the accompanying drawings is generally used to make the boundaries between adjacent components clear. As such, unless otherwise specified, the presence or absence of cross-hatching or shading does not convey or indicate any preference or requirement for the specific materials, material properties, dimensions, proportions, commonalities between the components shown, and / or any other characteristics, attributes, properties, etc. of the components. In addition, in the accompanying drawings, the sizes and relative sizes of the components may be exaggerated for clarity and / or descriptive purposes. When the exemplary embodiments can be implemented differently, the specific process sequence can be performed in a different order than described. For example, two successively described processes can be performed substantially simultaneously or in an order opposite to the described order. In addition, the same figure numbers represent the same components.

[0035] When a component is referred to as being "on" or "over," "connected to," or "coupled to" another component, the component may be directly on, directly connected to, or directly coupled to the other component, or intervening components may be present. However, when a component is referred to as being "directly on," "directly connected to," or "directly coupled to" another component, there are no intervening components. For this purpose, the term "connected" may refer to a physical connection, an electrical connection, etc., with or without intervening components.

[0036] For descriptive purposes, the present disclosure may use spatially relative terms such as "under," "beneath," "under," "down," "over," "upper," "above," "higher," and "side (e.g., as in "sidewall")," to describe the relationship of one component to another (other) component as shown in the accompanying drawings. The spatially relative terms are intended to encompass different orientations of the device in use, operation, and / or manufacture in addition to the orientation depicted in the accompanying drawings. For example, if the device in the accompanying drawings is turned over, components described as "under" or "beneath" other components or features would subsequently be positioned "over" the other components or features. Thus, the exemplary term "under" can encompass both the "above" and "below" orientations. Furthermore, the device may be otherwise oriented (e.g., rotated 90 degrees or at other orientations), and the spatially relative descriptors used herein should be interpreted accordingly.

[0037] The terms used here are for the purpose of describing specific embodiments, and are not intended to be restrictive. As used here, unless the context clearly indicates otherwise, the singular forms "one (kind, person)" and "said (the)" are also intended to include plural forms. In addition, when the terms "comprise" and / or "include" and their variations are used in this specification, it is explained that there are stated features, integral bodies, steps, operations, parts, assemblies and / or their groups, but it is not excluded that there are or add one or more other features, integral bodies, steps, operations, parts, assemblies and / or their groups. It should also be noted that, as used here, the terms "substantially", "approximately" and other similar terms are used as approximate terms and not as degree terms, so that they are used to explain the inherent deviations of the measured values, calculated values ​​and / or the values ​​provided that will be recognized by those of ordinary skill in the art.

[0038] Figure 1 It is a schematic diagram of the overall structure of a corrugated cardboard hot pressing laminating device according to one embodiment of the present disclosure.

[0039] like Figure 1-Figure 6 As shown, the corrugated cardboard hot pressing and laminating device disclosed in the present invention may include: an operating table assembly 1, a hot pressing mechanism 2, a moving mechanism 3, a collecting and sorting mechanism 4 and other components.

[0040] Figure 2 It is a schematic diagram of the overall structure of a corrugated cardboard hot pressing laminating device according to one embodiment of the present disclosure.

[0041] Figure 3 It is a structural schematic diagram of an operating table assembly 1 of a corrugated cardboard hot pressing laminating device according to one embodiment of the present disclosure.

[0042] Figure 4 It is a schematic structural diagram of a heat pressing mechanism 2 of a corrugated cardboard heat pressing laminating device according to an embodiment of the present disclosure.

[0043] like Figure 2-4 As shown, in the present disclosure, the operating table assembly 1 includes an operating table body 11, a first side plate 12, a first motor 13, a conveyor belt 14, a mounting plate 15, a second side plate 16, a guide plate 17 and a support plate 18, wherein the first side plate 12 is fixedly mounted above both sides of the operating table body 11, the first motor 13 is fixedly connected to the outside of the first side plate 12, the conveyor belt 14 is fixedly connected to the output end of the first motor 13 and is rotatably connected to the first side plate 12, the mounting plate 15 is fixedly connected above the operating table body 11 and located outside the first side plate 12, and the second side plate 16 is fixedly connected to one end of the first side plate 12. The guide plate 17 is fixedly connected to the second side plate 16 and located outside the operating table body 11, and the support plate 18 is fixedly connected below the operating table body 11.

[0044] like Figure 2-4 As shown, in a preferred embodiment, the hot pressing mechanism 2 includes a hydraulic cylinder 21, a connecting plate 22, a hot pressing plate 23, a fixed sleeve rod 24 and a sliding rod 25, wherein the hydraulic cylinder 21 is fixedly connected to the top of the mounting plate 15, the connecting plate 22 is fixedly connected to the bottom of the hydraulic cylinder 21, the hot pressing plate 23 is fixedly connected to the bottom of the connecting plate 22, the fixed sleeve rod 24 is fixedly sleeved on the connecting plate 22 and the top of the hydraulic plate, and the sliding rod 25 is elastically connected to the fixed sleeve rod 24 and slidably sleeved inside the fixed sleeve rod 24.

[0045] Therefore, the operator turns on the first motor 13, and then places the corrugated cardboard to be hot-pressed and bonded on the surface of the conveyor belt 14. The conveyor belt 14 drives the corrugated cardboard to move until it moves to the hot-pressing position. The operator turns off the first motor 13 and turns on the hydraulic cylinder 21. The hydraulic cylinder 21 drives the connecting plate 22 to move downward, and the connecting plate 22 drives the hot-pressing plate 23 to move downward while driving the fixed sleeve and the sliding rod 25 to move downward, so that the hot-pressing and bonding operation of the corrugated cardboard can be carried out. After the bonding is completed, the hydraulic cylinder 21 drives the connecting plate 22 and the hot-pressing plate 23 to move upward, and the conveyor belt 14 is turned on again to move the corrugated cardboard to one end of the conveyor belt 14 and then slides into the collecting and sorting rack through the guide plate 17.

[0046] Figure 5 It is a schematic structural diagram of a moving mechanism 3 of a corrugated cardboard hot-pressing laminating device according to an embodiment of the present disclosure.

[0047] Figure 6 It is a schematic structural diagram of a collecting and sorting mechanism 4 of a corrugated cardboard hot pressing and laminating device according to an embodiment of the present disclosure.

[0048] like Figure 5-6 As shown, in a preferred embodiment, the moving mechanism 3 includes a U-shaped frame 31, a fixed vertical rod 32, a top plate 33, a push handle 34 and a universal wheel 35, wherein the fixed vertical rod 32 is fixedly connected to the top of the U-shaped frame 31, the fixed vertical rod 32 is slidably connected to the collection frame 41, the top plate 33 is fixedly connected to the top of the fixed vertical rod 32, one end of the spring 49 is fixedly connected to the bottom of the top plate 33, the push handle 34 is fixedly connected to the outside of the fixed vertical rod 32, and the universal wheel 35 is fixedly connected to the bottom of the U-shaped frame 31.

[0049] Thus, the operator pushes the push handle 34, and the push handle 34 drives the universal wheel 35 to rotate. The rotation of the universal wheel 35 drives the U-shaped frame 31 and the fixed vertical rod 32 to move to transport the collected and sorted corrugated cardboards.

[0050] like Figure 3-6As shown, in the present disclosure, the collecting and sorting mechanism 4 includes a collecting frame 41, a sliding groove 42, a second motor 43, a screw rod 44, a sliding sorting plate 45, a transverse sorting groove 46, a telescopic motor 47, a transverse sorting plate 48 and a spring 49, wherein the collecting frame 41 is slidably connected above the moving mechanism 3, the sliding groove 42 is opened on the upper surface of the collecting frame 41, the second motor 43 is fixedly connected to the outside of the collecting frame 41, one end of the screw rod 44 is fixedly connected to the output end of the second motor 43 and is located inside the sliding groove 42, the other end of the screw rod 44 is rotatably connected to the collecting frame 41 through a bearing, the bottom of the sliding sorting plate 45 is threadedly connected to the screw rod 44 and is located above the collecting frame 41, the transverse sorting groove 46 is opened on the surface of the collecting frame 41 and passes through the collecting frame 41, the telescopic motor 47 is fixedly installed on the outside of the support frame close to the collecting and sorting mechanism 4, the transverse sorting plate 48 is fixedly connected to the outside of the telescopic motor 47, and the spring 49 is fixedly connected to the top of the collecting frame 41.

[0051] As a result, the corrugated cardboard after hot pressing and bonding is guided by the guide plate 17 and slides into the collecting rack 41. Due to the gravity of the corrugated cardboard itself, the collecting rack 41 slides downward along the fixed vertical rod 32 and drives the spring 49 to stretch. When the collecting rack 41 slides to contact with the U-shaped frame 31, the operator stops the hot pressing and bonding operation. At this time, the operator turns on the second motor 43 to drive the screw rod 44 to rotate. The rotation of the screw rod 44 drives the sliding sorting plate 45 to move and sort and align the corrugated cardboard in the collecting rack 41, and then turns on the telescopic motor 47 to drive the horizontal sorting plate 48 to move and sort and align the corrugated cardboard through the horizontal sorting groove 46. After the alignment is completed, the operator can push the moving mechanism 3 to transport the corrugated cardboard.

[0052] In the description of this specification, the description with reference to the terms "one embodiment / method", "some embodiments / methods", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment / method or example are included in at least one embodiment / method or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment / method or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments / methods or examples in a suitable manner. In addition, those skilled in the art may combine and combine different embodiments / methods or examples described in this specification and the features of different embodiments / methods or examples, unless they are contradictory.

[0053] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of this application, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0054] Those skilled in the art should understand that the above embodiments are only for the purpose of clearly illustrating the present disclosure, and are not intended to limit the scope of the present disclosure. For those skilled in the art, other changes or modifications may be made based on the above disclosure, and these changes or modifications are still within the scope of the present disclosure.

Claims

1. A corrugated cardboard hot pressing laminating device, characterized in that: include: An operating table assembly (1), the operating table assembly (1) comprising a support plate (18); A heat pressing mechanism (2), the heat pressing mechanism (2) being used for heat laminating corrugated paperboard; A moving mechanism (3), wherein the moving mechanism (3) is used for transferring corrugated cardboard; as well as A collecting and sorting mechanism (4), the collecting and sorting mechanism (4) comprising a collecting frame (41), a sliding groove (42), a second motor (43), a screw rod (44), a sliding sorting plate (45), a transverse sorting groove (46), a telescopic motor (47), a transverse sorting plate (48) and a spring (49), the collecting frame (41) is slidably connected to the top of the moving mechanism (3), the sliding groove (42) is opened on the upper surface of the collecting frame (41), the second motor (43) is fixedly connected to the outside of the collecting frame (41), one end of the screw rod (44) is fixedly connected to the output end of the second motor (43), and the second motor (43) is fixedly connected to the outside of the collecting frame (41). The collecting frame (41) is connected to the guide frame (42) and is located inside the sliding groove (42); the other end of the screw rod (44) is rotatably connected to the collecting frame (41) through a bearing; the bottom of the sliding sorting plate (45) is threadedly connected to the screw rod (44) and is located above the collecting frame (41); the transverse sorting groove (46) is opened on the surface of the collecting frame (41) and passes through the collecting frame (41); the telescopic motor (47) is fixedly installed on the outer side of the support frame close to the collecting and sorting mechanism (4); the transverse sorting plate (48) is fixedly connected to the outer side of the telescopic motor (47); and the spring (49) is fixedly connected to the top of the collecting frame (41).

2. The corrugated cardboard hot pressing bonding device according to claim 1, characterized in that: The operating table assembly (1) also includes an operating table body (11), a first side plate (12), a first motor (13), a conveyor belt (14), a mounting plate (15), a second side plate (16) and a guide plate (17).

3. The corrugated cardboard hot pressing bonding device according to claim 2, characterized in that: The first side plate (12) is fixedly mounted above both sides of the operating table body (11); the first motor (13) is fixedly connected to the outside of the first side plate (12); the conveyor belt (14) is fixedly connected to the output end of the first motor (13) and is rotatably connected to the first side plate (12); the mounting plate (15) is fixedly connected to the top of the operating table body (11) and is located outside the first side plate (12); the second side plate (16) is fixedly connected to one end of the first side plate (12); the guide plate (17) is fixedly connected to the second side plate (16) and is located outside the operating table body (11); and the support plate (18) is fixedly connected to the bottom of the operating table body (11).

4. The corrugated paperboard hot pressing bonding device according to claim 1, characterized in that: The hot pressing mechanism (2) comprises a hydraulic cylinder (21), a connecting plate (22), a hot pressing plate (23), a fixed sleeve rod (24) and a sliding rod (25); the hydraulic cylinder (21) is fixedly connected to the top of the mounting plate (15); the connecting plate (22) is fixedly connected to the bottom of the hydraulic cylinder (21); the hot pressing plate (23) is fixedly connected to the bottom of the connecting plate (22); the fixed sleeve rod (24) is fixedly sleeved on the top of the connecting plate (22) and the hydraulic plate; and the sliding rod (25) is elastically connected to the fixed sleeve rod (24) and is slidably sleeved inside the fixed sleeve rod (24).

5. The corrugated paperboard hot pressing bonding device according to claim 1, characterized in that: The moving mechanism (3) comprises a U-shaped frame (31), a fixed vertical rod (32), a top plate (33), a push handle (34) and a universal wheel (35); the fixed vertical rod (32) is fixedly connected to the top of the U-shaped frame (31); the fixed vertical rod (32) is slidably connected to the collecting frame (41); the top plate (33) is fixedly connected to the top of the fixed vertical rod (32); one end of the spring (49) is fixedly connected to the bottom of the top plate (33); the push handle (34) is fixedly connected to the outside of the fixed vertical rod (32); and the universal wheel (35) is fixedly connected to the bottom of the U-shaped frame (31).

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