Tea transportation device

Abstract

The utility model discloses a tea transportation device which comprises a concentric-square-shaped frame, rectangular openings are formed in the left side and the right side of the concentric-square-shaped frame respectively, a plurality of grid frames are vertically arranged in the concentric-square-shaped frame at equal intervals, clamping rods are arranged on the two sides of the bottom of each grid frame respectively, rod sleeves are slidably arranged on the clamping rods in a sleeved mode, and one end of each rod sleeve is connected with the inner side wall of the concentric-square-shaped frame. According to the tea leaf conveying device, tea leaves can be laid on the multiple grid frames, excessive extrusion of the tea leaves is avoided, the tea leaves are prevented from being pressed by an iron gauze, the tea leaves are prevented from being squeezed by the multiple grid frames, the tea leaves are prevented from being squeezed by the multiple branch pipes, and the tea leaves are prevented from being squeezed by the multiple branch pipes; the tea leaves are prevented from violently shaking, the tea leaves are subjected to damping treatment through the damping mechanism, shaking of the tea leaves is reduced, the cold air mechanism conveys cold air to the branch pipe and blows the cold air into the tea leaves from the first nozzle, so that the air circulation speed is increased, the tea leaves and the surrounding environment are cooled, and the tea leaf quality is kept.

Description

TECHNICAL FIELD

[0001] The utility model relates to tea processing technical field especially, relate to a tea transportation device. BACKGROUND

[0002] Tea is the tender leaf and bud of tea tree and the beverage raw material, rich in various beneficial components, such as tea polyphenols, caffeine, amino acid etc., has unique flavor and health care efficacy, and the tea leaf after picking needs to be transported, the reason is that tea garden is located in mountainous area and other specific origin, and tea processing ground, sales market and distance, timely transportation can guarantee tea freshness, avoid long time to place and lead to quality decline, ensure that tea is on time into subsequent processing link, satisfy market supply demand, realize its economic value.

[0003] The current tea transportation mode is mainly to place tea in a container, then place the container on a trolley, thereby realizing the transportation of tea, however, in this mode, tea is stacked in the container during transportation, and the stacking height is relatively high, so, during transportation, tea is subjected to excessive extrusion, and there is also jolt and vibration during transportation, which easily leads to tea shaking, and further causes tea to collide with each other, and further causes excessive extrusion between tea, which causes damage to tea, at the same time, tea is stacked with each other, during transportation, tea may heat due to its own respiration or rising of ambient temperature, which will affect the quality of tea, accelerate the deterioration of tea, and since air cannot be updated in time, it is also not conducive to tea to maintain good freshness.

[0004] Therefore, a tea transportation device is proposed to solve the above problems. UTILITY MODEL CONTENT

[0005] The utility model aims at providing a tea transportation device to solve the above problems.

[0006] To achieve this purpose, the utility model adopts the following technical solutions:

[0007] The utility model provides a tea leaf conveying device, including the back -shaped frame, both sides of back -shaped frame are equipped with the rectangular mouth, the inside vertical equidistance of back -shaped frame is equipped with a plurality of grid frame, both sides of grid frame bottom are equipped with the clamping rod, the rod sleeve of one end with the inside wall of back -shaped frame is connected is slidably arranged on the clamping rod, the upper portion of arbitrary grid frame left side is equipped with the shunt pipe, both ends of shunt pipe are with left the inside wall rotation of rectangular mouth is connected, the right equidistant of shunt pipe is equipped with a plurality of branch pipes, the bottom equidistant of branch pipe is equipped with a plurality of nozzle no.

[0008] Preferably, the cold air mechanism includes an L-shaped pipe, a connecting sleeve, a corrugated pipe and a cold air machine, the left side of the back-shaped frame is provided with an upwardly extending L-shaped pipe, a connecting sleeve is arranged between the lower end of the connecting sleeve and the outside of the back-shaped frame, a corrugated pipe is arranged between the L-shaped pipe and the shunt pipe, and a cold air machine is arranged on the top of the back-shaped frame and is in communication with the upper end of the L-shaped pipe.

[0009] Preferably, the bottom of the grid frame is provided with a horizontal pipe, the left end of the horizontal pipe passes through the left rectangular mouth and is in communication with the L-shaped pipe, and a plurality of nozzle no. 2 are equidistantly arranged on the top of the horizontal pipe.

[0010] Preferably, the connecting mechanism includes an L-shaped plate, a connecting plate, a clamping groove and a hand screw bolt, the inner side wall of the right rectangular mouth is provided with an L-shaped plate, the inner side of the L-shaped plate is provided with a connecting plate, the right ends of the horizontal plurality of branch pipes are connected to the outer side of the connecting plate, the right side of the connecting plate is provided with a clamping groove, and a hand screw bolt extending into the clamping groove is arranged on the L-shaped plate.

[0011] Preferably, the damping mechanism includes a horizontal plate, a spring, a damper, a shaft cylinder and a limiting shaft, the bottom of the back-shaped frame is provided with a horizontal plate, four springs arranged in a rectangular array are arranged between the back-shaped frame and the horizontal plate, a damper is arranged between the back-shaped frame and the horizontal plate, a shaft cylinder is arranged on the top of the horizontal plate, and a limiting shaft extending upward and connected to the bottom of the back-shaped frame is slidably connected in the shaft cylinder.

[0012] Preferably, a rubber sleeve abutting against the bottom of the grid frame and the top of the rod sleeve is sleeved on the clamping rod, four casters are arranged at the corners of the bottom of the horizontal plate, and a handle is arranged on the top of the horizontal plate.

[0013] The utility model have the beneficial effects that relative to prior art, the multiple grid frames can all pave tea leaves, arrange space reasonably, avoid excessive extrusion to tea leaves, simultaneously, utilize the connecting mechanism to position branch pipe, make the wire mesh connected with the branch pipe indirectly hold tea leaves, avoid tea leaves to shake violently, play the role of limiting tea leaves, in the process of transportation, through the damping mechanism, the back -shaped frame, the grid frame and tea leaves are damped, reduce the shaking of tea leaves, reduce the collision between tea leaves, further reduce the situation of excessive extrusion between tea leaves, improve the quality of tea transportation, simultaneously, through the cold -blast mechanism, cold air is generated and is sent to the shunt pipe and branch pipe, makes cold air from the nozzle on the branch pipe one -way to tea leaves, with the speed of air circulation is accelerated, simultaneously, still carry out the temperature reduction to tea leaves and surrounding environment, keep tea quality, provide fresh air for tea leaves, prolong the shelf life and fresh state of tea leaves. BRIEF DESCRIPTION OF DRAWINGS

[0014] The drawings further illustrate the utility model, but the contents in the drawings do not constitute any limitation to the utility model.

[0015] Figure 1 It is the front view of the utility model;

[0016] Figure 2 It is the front view of the utility model;

[0017] Figure 3 It is the enlarged view of A in the drawing of the utility model;

[0018] Figure 4 It is the local three-dimensional structure schematic view of the utility model.

[0019] In the drawings: 1, back -shaped frame, 2, rectangular mouth, 30, nozzle two, 31, grid frame, 32, clamping rod, 33, rod cover, 34, shunt pipe, 35, branch pipe, 36, nozzle one, 37, wire mesh, 38, connecting rod, 39, cross pipe, 4, cold -blast mechanism, 41, L-shaped pipe, 42, connecting sleeve, 43, bellows, 44, cold -blast machine, 5, connecting mechanism, 51, L-shaped plate, 52, connecting plate, 53, clamping groove, 54, hand screw bolt, 6, rubber cover, 71, trundle, 72, handle, 8, damping mechanism, 81, horizontal plate, 82, spring, 83, damper, 84, shaft cylinder, 85, limit shaft. DETAILED DESCRIPTION

[0020] The embodiments of the present application are described below in detail, examples of which are shown in the drawings, wherein the same or similar notations represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by reference to the drawings are exemplary only, and are merely intended to explain the present application, and are not to be understood as limiting the present application. In the description of the present application, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are merely intended to facilitate the description of the present application and simplify the description, and therefore cannot be understood as indicating or implying that the devices or elements indicated must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first", "second" are only for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first", "second" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "multiple" is two or more, and the meaning of "several" is one or more, unless otherwise explicitly specified.

[0021] In the description of the present application, it should be noted that, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection" should be understood broadly, for example, it can be fixed connection, or detachable connection, or integral connection; it can be mechanical connection, or electrical connection or can communicate with each other; it can be directly connected, or indirectly connected through an intermediate medium, or the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0022] In the present application, unless otherwise explicitly specified and limited, the "upper" or "lower" of the first feature to the second feature can include the direct contact of the first and second features, or can include the contact of the first and second features through another feature between them. Moreover, the "upper", "upper" and "upper" of the first feature to the second feature include the vertical direction of the first feature above and obliquely above the second feature, or only indicate that the horizontal height of the first feature is higher than that of the second feature. The "below", "below" and "below" of the first feature to the second feature include the vertical direction of the first feature below and obliquely below the second feature, or only indicate that the horizontal height of the first feature is less than that of the second feature.

[0023] The disclosure below provides many different embodiments or examples for implementing different structures of the present application. In order to simplify the disclosure of the present application, the components and settings of specific examples are described below. Of course, they are only examples and the purpose is not to limit the present application. In addition, the present application can repeatedly refer to numbers and / or letters in different examples, and such repetition is for the purpose of simplification and clarity, which in itself does not indicate the relationship between the various embodiments and / or settings discussed. In addition, the present application provides examples of various specific processes and materials, but those skilled in the art can realize the application of other processes and / or the use of other materials.

[0024] In this embodiment, by Figures 1-4 It is given that a tea transportation device, the utility model discloses a back -shaped frame 1, the left and right sides of back -shaped frame 1 are all seted up rectangular mouth 2, the inside vertical equidistance of back -shaped frame 1 is equipped with a plurality of grid frames 31, both sides of the bottom of grid frame 31 are equipped with the clamping rod 32, the clamping rod 32 is slidably equipped with the rod sleeve 33 with one end and the inside wall of back -shaped frame 1 is connected, the top of the left side of any grid frame 31 is equipped with the shunt pipe 34, both ends of shunt pipe 34 are rotatably connected with the left side rectangular mouth 2 inside wall, the right side equidistance of shunt pipe 34 is equipped with a plurality of branch pipes 35, the bottom equidistance of branch pipe 35 is equipped with a plurality of nozzles 36, the inside of grid frame 31 is equipped with wire mesh 37, and the connecting rod 38 is arranged between the wire mesh 37 and the branch pipe 35, the back -shaped frame 1 and a plurality of shunt pipes 34 are equipped with cold air mechanism 4, and a plurality of branch pipes 35 and the right side rectangular mouth 2 are equipped with connecting mechanism 5 between the same horizontal, and the bottom of back -shaped frame 1 is equipped with damping mechanism 8.

[0025] In this embodiment, the tea is laid on a plurality of grid frames 31, the space is reasonably arranged, the tea is avoided from being uniformly accumulated on the same container, and the tea is avoided from being excessively squeezed, simultaneously, the connecting mechanism 5 is used for positioning the branch pipe 35, so that the wire mesh 37 indirectly connected with the branch pipe 35 holds the tea, the tea is avoided from being violently shaken, the function of limiting the tea is played, in the process of transportation, the back -shaped frame 1, grid frame 31 and tea are treated by damping mechanism 8, the shaking of tea is reduced, the collision between tea is reduced, the situation of excessive squeezing between tea is further reduced, the quality of tea transportation is improved, simultaneously, the grid frame 31 and the wire mesh 37 all have mesh, the circulation of air can be guaranteed, so that fresh air can enter the inside of grid frame 31, enough oxygen is provided for tea, simultaneously, the cold air is generated by cold air mechanism 4 and is transported to the shunt pipe and branch pipe 35, so that the cold air is blown to the tea from the nozzle one 36 on the branch pipe 35, the circulation speed of air is accelerated, simultaneously, the tea and the surrounding environment are cooled, the quality of tea is maintained, fresh air is provided for tea, the shelf life and fresh state of tea are prolonged.

[0026] Preferably, as another embodiment of the utility model, the cold air mechanism 4 comprises an L-shaped pipe 41, a connecting sleeve 42, a corrugated pipe 43 and a cold air fan 44, the left side of the meandering frame 1 is provided with the upwardly extending L-shaped pipe 41, the connecting sleeve 42 is arranged between the lower end of the connecting sleeve 42 and the outer side of the meandering frame 1, the corrugated pipe 43 is arranged between the L-shaped pipe 41 and the shunt pipe 34, and the top of the meandering frame 1 is provided with the cold air fan 44, which is in communication with the upper end of the L-shaped pipe 41.

[0027] In this embodiment, the cold air fan 44 is started, which sucks in external air and cools it, and the cooled cold air enters the L-shaped pipe 41 in communication therewith from the air outlet end thereof; the L-shaped pipe 41 is located on the left side of the meandering frame 1 and extends upward, which changes the flow direction of the cold air and makes it turn downward, then the cold air is transmitted through the corrugated pipe 43 between the L-shaped pipe 41 and the shunt pipe 34, the corrugated pipe 43 guarantees stable transmission of the cold air between the pipes by virtue of the bendable and stretchable characteristics, and is not affected even if the shunt pipe 34 rotates, finally, the cold air flows into the shunt pipe 34, is blown out from the nozzle 36 on the branch pipe 35 connected thereto, and is blown to the tea leaves through the mesh holes of the wire mesh 37, so as to achieve the purpose of blowing cold air and cool the tea leaves, and meanwhile, the air circulation is accelerated.

[0028] Preferably, as another embodiment of the utility model, the lower side of the grid frame 31 is provided with a horizontal pipe 39, the left end of the horizontal pipe 39 passes through the left rectangular opening 2 and is in communication with the L-shaped pipe 41, and a plurality of nozzles 30 are equidistantly arranged on the top of the horizontal pipe 39.

[0029] In this embodiment, the cold air of the L-shaped pipe 41 enters the horizontal pipe 39 and is blown out from the nozzles 30 on the horizontal pipe 39, and is blown to the tea leaves through the mesh holes of the grid frame 31, so as to cool the tea leaves, further improve the speed and effect of cooling, and accelerate the air circulation.

[0030] Preferably, as another embodiment of the utility model, the connecting mechanism 5 comprises an L-shaped plate 51, a connecting plate 52, a clamping groove 53 and a hand screw bolt 54, the inner side wall of the right rectangular opening 2 is provided with the L-shaped plate 51, the inner side of the L-shaped plate 51 is provided with the connecting plate 52, the right end of each of the plurality of branch pipes 35 is connected to the outer side of the connecting plate 52, the right side of the connecting plate 52 is provided with the clamping groove 53, and the hand screw bolt 54 extending into the clamping groove 53 is arranged on the L-shaped plate 51.

[0031] In this embodiment, by screwing the knob bolt 54, the knob bolt 54 is moved on the L-shaped plate 51, that is, the left end of the L-shaped plate 51 abuts against or leaves the clamping groove 53 on the connecting plate 52, so that the connecting plate 52 is positioned, and since the shunt pipe 34 is indirectly connected with the connecting plate 52 through the branch pipe 35, the shunt pipe 34 can be positioned to prevent the shunt pipe 34 from rotating, and after the positioning is released, the shunt pipe 34 can be rotated.

[0032] Preferably, as another embodiment of the utility model, the damping mechanism 8 comprises a horizontal plate 81, springs 82, dampers 83, a shaft cylinder 84 and a limiting shaft 85, the horizontal plate 81 is arranged below the U-shaped frame 1, four springs 82 are arranged in a rectangular array between the U-shaped frame 1 and the horizontal plate 81, the dampers 83 are arranged between the U-shaped frame 1 and the horizontal plate 81, the shaft cylinder 84 is arranged on the top of the horizontal plate 81, and the limiting shaft 85, which extends upwards and is connected with the bottom of the U-shaped frame 1, is slidably connected in the shaft cylinder 84.

[0033] In this embodiment, when the U-shaped frame 1 shakes and vibrates, the springs 82 mainly play a buffering role, when impacted by external force, the springs 82 are compressed or stretched, and the impact energy is stored as elastic potential energy to slow down the instantaneous impact; and the dampers 83 are used for controlling the rebound and vibration amplitude of the springs 82, when the springs 82 rebound or vibrate, the dampers 83 consume the energy released by the springs, preventing the U-shaped frame 1 from vibrating excessively, but allowing the vibration to quickly attenuate, and the two cooperate to make the vibration stop smoothly, so that the U-shaped frame 1, the grid frame 31 and the tea leaves are more stable during transportation, wherein the limiting shaft 85 can slide up and down on the shaft cylinder 84, playing a limiting role to avoid the U-shaped frame 1 from deviating.

[0034] Preferably, as another embodiment of the utility model, the clamping rod 32 is sleeved with rubber sleeves 6, the two sides of which abut against the bottom of the grid frame 31 and the top of the rod sleeve 33 respectively, four casters 71 are arranged at the four corners of the bottom of the horizontal plate 81, and a handle 72 is arranged on the top of the horizontal plate 81.

[0035] In this embodiment, during transportation, the vehicle will inevitably encounter bumps and vibrations, the rubber sleeves 6 have good elasticity, and when the grid frame 31 is vibrated, the rubber sleeves 6 can absorb and buffer part of the impact force, playing a damping and buffering role; the casters 71 are installed on the bottom of the horizontal plate 81, so that the equipment can be easily moved on a plane; and the handle 72 provides a convenient and comfortable force point for the operator, facilitating the pushing of the equipment.

[0036] Working principle: The tea leaves are laid on the plurality of grid frames 31, and the space is reasonably arranged to avoid being uniformly stacked on the same container to cause excessive extrusion of the tea leaves. Meanwhile, by twisting the threaded bolt 54, the threaded bolt 54 on the L-shaped plate 51 is moved, that is, the left end of the L-shaped plate 51 abuts against or leaves the clamping groove 53 on the connecting plate 52 to realize the purpose of positioning or not positioning the connecting plate 52. After the positioning is released, the flow divider 34 and the branch pipe 35 are rotated, at this time, the grid frame 31 and the tea leaves are lifted upward, and the clamping rod 32 on the grid frame 31 leaves the rod sleeve 33, at this time, the grid frame 31 and the tea leaves can be taken down. When the connecting plate 52 is positioned, the flow divider 34 is indirectly connected with the connecting plate 52 through the branch pipe 35, so the flow divider 34 can be positioned to prevent the flow divider 34 from rotating, and the wire mesh 37 indirectly connected with the branch pipe 35 through the connecting rod presses the tea leaves to avoid violent shaking of the tea leaves, thereby playing a limiting role on the tea leaves. In the transportation process, the spring 82 plays a buffering role, and the damper 83 consumes the energy released by the spring to prevent the return frame 1 from excessive vibration, but allows the vibration to quickly attenuate, so that the vibration is stably stopped, and the return frame 1, the grid frame 31 and the tea leaves are more stable in the transportation process, the shaking of the tea leaves is reduced, the collision between the tea leaves is reduced, the excessive extrusion between the tea leaves is further reduced, and the quality of the tea leaves transportation is improved. At the same time, the grid frame 31 and the wire mesh 37 are both provided with mesh holes to ensure the circulation of air, so that fresh air can enter the inside of the grid frame 31 to provide sufficient oxygen for the tea leaves. Meanwhile, the cold air machine 44 is started to sequentially deliver the cooled cold air into the L-shaped pipe 41, the corrugated pipe 43, the flow divider 34 and the branch pipe 35, and finally, the cold air is blown out from the nozzle 36 on the branch pipe 35 to the tea leaves through the mesh holes of the wire mesh 37 to achieve the purpose of blowing cold air to cool the tea leaves. Meanwhile, the circulation of air can be accelerated to provide fresh air for the tea leaves, thereby prolonging the shelf life and fresh state of the tea leaves.

[0037] In the description of the present specification, the description of the terms "embodiment", "one embodiment", "certain embodiments", "illustrative embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in connection with the described embodiment or example are included in at least one embodiment or example of the present application. In the present specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the described specific features, structures, materials or characteristics can be combined in any one or more embodiments or examples in a suitable manner.

[0038] The technical principles of the present application are described above in combination with specific embodiments. These descriptions are only for explaining the principles of the present application, and cannot be interpreted as limiting the protection scope of the present application in any way. Based on the explanations herein, other specific embodiments of the present application can be conceived by those skilled in the art without creative efforts, and these equivalent variations or replacements are all included in the scope defined by the claims of the present application.

Claims

1. A tea transport device, characterised in that: The utility model provides a kind of cooling device, including backshaped frame (1), the left and right sides of the backshaped frame (1) are equipped with rectangular mouth (2), the inside of the backshaped frame (1) is vertically equidistant and provided with multiple grid frames (31), the both sides of the bottom of the grid frame (31) are equipped with clamping rod (32), the clamping rod (32) is slidably equipped with the rod sleeve (33) with one end being connected with the inside wall of the backshaped frame (1), the upper side of the left side of any grid frame (31) is equipped with shunt pipe (34), the both ends of the shunt pipe (34) are rotatably connected with the left side of the inside wall of the rectangular mouth (2), the right side of the shunt pipe (34) is equidistantly equipped with multiple branch pipes (35), the bottom of the branch pipe (35) is equidistantly equipped with multiple nozzles one (36), the inside of the grid frame (31) is equipped with wire mesh (37), the wire mesh (37) and the branch pipe (35) are equipped with connecting rod (38), the backshaped frame (1) and multiple shunt pipes (34) are equipped with cold air mechanism (4), and multiple branch pipes (35) and the right side of the rectangular mouth (2) are equipped with connecting mechanism (5), and the bottom of the backshaped frame (1) is equipped with damping mechanism (8).

2. A tea conveying device according to claim 1, wherein The cold air mechanism (4) includes L-shaped pipe (41), connecting sleeve (42), bellows (43) and air cooler (44), the left side of the backshaped frame (1) is equipped with upwardly extending L-shaped pipe (41), the lower end of the connecting sleeve (42) and the outside of the backshaped frame (1) are equipped with connecting sleeve (42), the L-shaped pipe (41) and the shunt pipe (34) are equipped with bellows (43), and the top of the backshaped frame (1) is equipped with air outlet and air cooler (44) that the upper end of the L-shaped pipe (41) is communicated.

3. A tea conveying device according to claim 2, wherein The lower side of the grid frame (31) is equipped with horizontal pipe (39), the left end of the horizontal pipe (39) passes through the left side of the rectangular mouth (2) and is communicated with the L-shaped pipe (41), and the top of the horizontal pipe (39) is equidistantly equipped with multiple nozzles two (30).

4. The tea conveying device according to claim 1, wherein The connecting mechanism (5) includes L-shaped plate (51), connecting plate (52), clamping groove (53) and hand screw bolt (54), the inside wall of the right side of the rectangular mouth (2) is equipped with L-shaped plate (51), the inside of the L-shaped plate (51) is equipped with connecting plate (52), and the right end of multiple branch pipes (35) is connected with the outside of the connecting plate (52), the right side of the connecting plate (52) is equipped with clamping groove (53), and the L-shaped plate (51) is equipped with hand screw bolt (54) extending to the inside of the clamping groove (53).

5. The tea conveying device according to claim 1, wherein The damping mechanism (8) comprises a cross plate (81), a spring (82), a damper (83), a shaft cylinder (84) and a limiting shaft (85), the lower portion of the meandering frame (1) is provided with the cross plate (81), four springs (82) distributed in a rectangular array are arranged between the meandering frame (1) and the cross plate (81), the damper (83) is arranged between the meandering frame (1) and the cross plate (81), the top of the cross plate (81) is provided with the shaft cylinder (84), and the inside of the shaft cylinder (84) is slidably connected with the limiting shaft (85) extending upwards and connected with the bottom of the meandering frame (1).

6. A tea conveying device according to claim 5, wherein The rubber sleeve (6) is arranged on the clamping rod (32) and abuts against the bottom of the grid frame (31) and the top of the rod sleeve (33) on two sides, four corners of the bottom of the cross plate (81) are all provided with the trundle (71), and the top of the cross plate (81) is provided with the handle (72).

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