Double-layer folding rack

Abstract

The utility model discloses a double-layer folding rack, the double-layer folding rack has an unfolded state and a folded state, the double-layer folding rack comprises a bottom-layer placing seat, a top-layer placing seat and a state adjusting mechanism, the bottom-layer placing seat comprises a bottom-layer placing table and a pair of supporting assemblies, and the state adjusting mechanism comprises a first state adjusting component; the first state adjusting component comprises a pair of state adjusting assemblies and a pair of unfolding maintaining assemblies, each state adjusting assembly comprises an adjusting piece and a guide groove, and when the double-layer folding material frame is in an unfolding state, the top-layer containing base is borne by the unfolding maintaining assemblies; the top-layer placing seat can rotate away from the unfolding keeping assembly by taking the adjusting piece as a rotating shaft and is guided to slide downwards through the matching effect of the adjusting piece and the guide groove, so that the adjusting piece slides from the high end part of the guide groove to the low end part; the top-layer placing base can rotate to the surface of the bottom-layer placing table with the adjusting piece located at the lower end of the guide groove as a rotating shaft and is borne by the bottom-layer placing table, and at the moment, the double-layer folding material frame is converted into a folding state from a using state.

Description

Technical Field

[0001] The utility model relates to the technical field of material racks, in particular to a double-layer folding material rack. Background Art

[0002] Currently, most material racks are of single-layer design. In order to meet actual usage requirements, the load-bearing surface of such single-layer material racks is usually relatively small, so the amount of materials they can carry is relatively small. As a result, when using such single-layer material racks to store and transport materials, the use cost and transportation cost are relatively high, and the lateral space required for storage is also relatively large.

[0003] Some racks are designed with double-layer structures to increase the load capacity by carrying materials on both the top and bottom. The top pallet of this double-layer rack is usually designed to be movable. When not in use, multiple workers need to work together to lift the top pallet down and place it on the bottom pallet, so as to reduce the vertical space occupied by the double-layer rack for storage. Obviously, this approach consumes more manpower, is more troublesome to operate, and cannot quickly adjust the position of the top pallet, so it is less practical. Utility Model Content

[0004] In order to solve the above technical problems and achieve at least one advantage of the utility model, the utility model provides a double-layer folding material rack, the double-layer folding material rack has an unfolded state and a folded state, and the double-layer folding material rack includes:

[0005] A bottom layer placement seat, the bottom layer placement seat comprises a bottom layer placement table and a pair of support components, the pair of support components are relatively spaced apart and arranged at two opposite edges of the bottom layer placement table and extend upward from the upper surface of the bottom layer placement table by a predetermined length, and the bottom layer placement table is used to carry materials;

[0006] A top-layer placement seat, wherein the top-layer placement seat is used to carry materials;

[0007] The state adjustment mechanism comprises a first state adjustment component, the first state adjustment component comprises a pair of state adjustment components and a pair of unfolding and holding components, the pair of unfolding and holding components are installed on a pair of support components, the state adjustment component comprises an adjustment piece and a guide groove, the adjustment piece is clamped in the guide groove, the guide groove has a predetermined length in the vertical direction, the adjustment piece and the guide groove are respectively arranged on the top-level placement seat and the support component, when the double-layer folding material rack is in the unfolded state, the adjustment piece is clamped in the high end of the guide groove, the top-level placement seat is supported by the unfolding and holding components The top-layer placing seat is arranged at a predetermined height above the bottom-layer placing table in a manner. At this time, the material can be placed on the bottom-layer placing seat through the space between the top-layer placing seat and the bottom-layer placing seat. The top-layer placing seat can be rotated away from the unfolding and holding assembly with the adjusting member as the rotating shaft and guided to slide down through the cooperation of the adjusting member and the guide groove, so that the adjusting member slides from the high end of the guide groove to the low end. Then, the top-layer placing seat can be rotated to the surface of the bottom-layer placing table with the adjusting member located at the low end of the guide groove as the rotating shaft and be carried by the bottom-layer placing table. At this time, the double-layer folding material rack is transformed from the use state to the folded state.

[0008] According to one embodiment of the utility model, the unfolding and holding assembly includes an unfolding and holding body and a rotating member, the unfolding and holding body is installed on the supporting assembly, and the rotating member is rotatably installed on the unfolding and holding body. In the process of the double-layer folding material rack being transformed from a folded state to a use state, the top-layer placement seat that is rotated away from the bottom-layer placement table by an external force can be guided to slide up through the cooperation of the adjustment member and the guide groove, and at the same time, it rotates with the adjustment member as the rotating shaft to overlap the rotating member and slides obliquely on the surface of the rotating member with the rotating member as the fulcrum until it is horizontally placed on the rotating member, and the rotating member is driven to rotate by the top-layer placement seat sliding on its surface.

[0009] According to an embodiment of the utility model, the unfolding and holding body includes a holding portion and a connecting portion, the connecting portion is installed on the supporting assembly, the holding portion is installed on the side of the connecting portion, the rotating member is rotatably installed on the holding portion, a pair of the holding portions are configured to be able to rotate toward or away from each other and drive the rotating member connected thereto to rotate together, when the double-layer folding material rack is in an unfolded state, the holding portion and the rotating member after rotating toward each other are located between the bottom placement table and the top placement seat, the distance between the pair of rotating members is less than the length of the top placement seat, the top placement seat is supported by the rotating member and placed at a predetermined height above the bottom placement table, after the top placement seat rotates away from the rotating member with the adjusting member as the rotating axis and is guided to slide down through the cooperation of the adjusting member and the guide groove, the pair of rotating members after rotating toward each other are maintained on both sides of the top placement seat, and the distance between the pair of rotating members is greater than the length of the top placement seat, and the top placement seat can rotate between the pair of rotating members to rotate to or away from the surface of the bottom placement table.

[0010] According to one embodiment of the utility model, the supporting assembly has a stop portion, which is located outside the retaining portion. A pair of the stop portions of the supporting assembly are arranged opposite to each other, and the distance between the pair of the stop portions is greater than the distance between one end of the pair of retaining portions after they are rotated toward each other and away from the corresponding connecting portion, but is smaller than the distance between one end of the pair of retaining portions after they are rotated toward each other and close to the corresponding connecting portion. The pair of the stop portions can limit the angle of rotation of the pair of retaining portions toward each other and support the retaining portions after they are rotated.

[0011] According to an embodiment of the utility model, the top-level placement seat includes a top-level placement table and a pair of connecting components, the adjustment member is arranged on the top-level placement table, a pair of the connecting components are arranged at opposite sides of the top-level placement table at a relative interval, the top-level placement table is used to carry materials, each of the connecting components is rotatably installed on a supporting component, when the top-level placement table is supported by the bottom-level placement table, a pair of the connecting components can be driven to rotate toward each other to rotate to the upper surface of the top-level placement table or rotate away from each other to rotate to the direction in which the corresponding supporting component extends upward, the supporting component has a blocked portion, and the state adjustment mechanism It also includes a pair of second state adjustment components, each of which is movably installed with a connecting component. When the connecting component is located in the direction in which the supporting component extends upward, the second state adjustment component can move up and down to abut or separate from the blocked portion. The blocked portion abuts against the second state adjustment component to prevent the connecting component from turning to the top placement table supported by the bottom placement table. When the top placement table is located at a predetermined height above the bottom placement table, the connecting component located in the direction in which the supporting component extends upward protects the material on the top placement table.

[0012] According to one embodiment of the utility model, at least one slot is formed at the bottom end of the supporting component, and the size of the slot is matched with the size of the top end of the connecting component. When at least two of the double-layer folding racks are in an unfolded state, one of the double-layer folding racks can be stacked with another double-layer folding rack in a manner in which its supporting component is sleeved on the top end of the connecting component of the other double-layer folding rack through the cooperation of the slot and the top end of the connecting component.

[0013] According to one embodiment of the utility model, the double-layer folding material rack includes a material pressing unit, the material pressing unit includes a first material pressing mechanism, the first material pressing mechanism includes a first material pressing piece and a pair of first locking components, each of the first locking components is installed with one of the connecting components, and the first material pressing piece is locked to the top of the material supported by the top placement table in a horizontal manner through a pair of the first locking components and presses on the material.

[0014] According to one embodiment of the utility model, the pressing unit also includes a second pressing mechanism, which includes a second pressing piece and at least one second locking component, and the second pressing piece and the second locking component are both arranged at the bottom of the top placement table. When the top placement table is located at a predetermined height above the bottom placement table, the second pressing piece can be locked by the second locking component to the top of the material supported by the bottom placement table and pressed on the material.

[0015] According to one embodiment of the utility model, the top-level placement platform includes a top-level platform body and a plurality of second positioning components, the connecting component is installed on the top-level platform body, the second positioning component is installed on the top-level platform body and is located between a pair of the connecting components, and the second positioning component is used to position the material carried by the top-level platform body.

[0016] According to one embodiment of the utility model, the bottom placement table includes a bottom platform body and a plurality of first positioning components, the support component is installed on the bottom platform body, the first positioning component is installed on the bottom platform body and is located between a pair of support components, and the first positioning component is used to position the material carried by the bottom platform body. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 The utility model shows a schematic structural diagram of the double-layer folding material rack.

[0018] Figure 2 A three-dimensional diagram showing the structural relationship between the bottom layer placement seat, the top layer placement platform and the first state adjustment component of the double-layer folding material rack of the utility model is shown.

[0019] Figure 3 A three-dimensional diagram showing the structural relationship between the supporting assembly, the connecting assembly and the second state adjustment component of the double-layer folding material rack of the utility model is shown.

[0020] Figure 4 The utility model shows a structural front section view of the double-layer folding material rack.

[0021] Figure 5 A structural side sectional view of the double-layer folding material rack of the utility model is shown.

[0022] Figure 6 The utility model shows a three-dimensional diagram of the structural relationship between the top layer placement seat and the material pressing unit of the double-layer folding material rack.

[0023] Figure 7 A structural cross-sectional view of the second locking assembly of the double-layer folding material rack of the utility model is shown. DETAILED DESCRIPTION

[0024] The following description is used to disclose the utility model so that those skilled in the art can implement the utility model. The preferred embodiments described below are only examples, and those skilled in the art can think of other obvious variations. The basic principles of the utility model defined in the following description can be applied to other embodiments, variations, improvements, equivalents, and other technical solutions that do not deviate from the spirit and scope of the utility model.

[0025] Those skilled in the art should understand that, in the disclosure of the present invention, the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicating the orientation or position relationship are based on the orientation or position relationship shown in the drawings, which are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, the above terms should not be understood as limiting the present invention.

[0026] It is to be understood that the term "one" should be understood as "at least one" or "one or more", that is, in one embodiment, the number of an element may be one, while in another embodiment, the number of the element may be multiple, and the term "one" should not be understood as a limitation on the quantity.

[0027] refer to Figure 1 to Figure 2 A double-layer folding material rack according to a preferred embodiment of the utility model will be described in detail below. The double-layer folding material rack includes a bottom-layer placing seat 10, a top-layer placing seat 20 and a state adjustment mechanism 30. The bottom-layer placing seat 10 and the top-layer placing seat 20 are both used to carry materials. The top-layer placing seat 20 is arranged above the bottom-layer placing seat 10 through the state adjustment mechanism 30, and the state adjustment mechanism 30 can adjust the height of the top-layer placing seat 20 relative to the bottom-layer placing seat 10. When the height difference between the top-layer placing seat 20 and the bottom-layer placing seat 10 is greater than the height of the material, the material can be placed on the bottom-layer placing seat 10 through the space between the top-layer placing seat 20 and the bottom-layer placing seat 10, and the double-layer folding material rack is in an unfolded state; when the height difference between the top-layer placing seat 20 and the bottom-layer placing seat 10 is less than the height of the material, the double-layer folding material rack is in a folded state.

[0028] The bottom placement seat 10 includes a bottom placement platform 11 and a pair of support components 12, which are arranged at two opposite edges of the bottom placement platform 11 at intervals and extend upward from the upper surface of the bottom placement platform 11 by a predetermined length. The bottom placement platform 11 is used to carry materials.

[0029] The state adjustment mechanism 30 is a first state adjustment component 31, which includes a pair of state adjustment components 311 and a pair of unfolding and holding components 312. The pair of unfolding and holding components 312 are installed on a pair of support components 12. The state adjustment component 311 includes an adjustment piece 3111 and a guide groove 3112. The adjustment piece 3111 is clamped in the guide groove 3112. The guide groove 3112 has a predetermined length in the vertical direction. The adjustment piece 3111 and the guide groove 3112 are respectively arranged on the top-level placement seat 20 and the support component 12.

[0030] When the double-layer folding material rack is in the unfolded state, the adjustment member 3111 is clamped to the high end of the guide groove 3112, and the top-layer placement seat 20 is arranged at a predetermined height above the bottom-layer placement platform 11 in a manner of being carried by the unfolding and holding assembly 312. The top-layer placement seat 20 can rotate away from the unfolding and holding assembly 312 with the adjustment member 3111 as the rotation axis and be guided to slide down through the cooperation of the adjustment member 3111 and the guide groove 3112, so that the adjustment member 3111 slides from the high end of the guide groove 3112 to the low end, and then the top-layer placement seat 20 can rotate to the surface of the bottom-layer placement platform 11 with the adjustment member 3111 located at the low end of the guide groove 3112 as the rotation axis and be carried by the bottom-layer placement platform 11, at which time the double-layer folding material rack is transformed from the use state to the folded state. In this way, the double-layer folding material rack can meet the demand of carrying double-layer materials, and can be stored in a folded state when not in use, effectively reducing its vertical space occupation. In addition, during the switching of the double-layer folding rack between the unfolded state and the folded state, a single person can push and pull the top-layer placement seat 20 , which is more labor-saving, simple and fast compared to moving the top-layer placement seat 20 .

[0031] refer to Figures 2 to 3It is worth mentioning that the unfolding and holding assembly 312 includes an unfolding and holding body 3121 and a rotating member 3122, wherein the unfolding and holding body 3121 is mounted on the supporting assembly 12, and the rotating member 3122 is rotatably mounted on the unfolding and holding body 3121. In the process of the double-layer folding material rack being transformed from the folding state to the use state, the top-layer placement seat 20 that is turned away from the bottom-layer placement table 11 by the external force can be guided to slide upward through the cooperation of the adjustment member 3111 and the guide groove 3112, and at the same time, the adjustment member 3111 is used as a rotating shaft to rotate to overlap the rotating member 3122 and slide obliquely on the surface of the rotating member 3122 with the rotating member 3122 as a fulcrum until it is horizontally placed on the rotating member 3122, and the rotating member 3122 is driven by the top-layer placement seat 20 sliding on its surface to rotate, so as to reduce the friction between the two, increase the smoothness of the movement of the top-layer placement seat 20, and avoid the friction between the two to be damaged and affect the overall service life.

[0032] Further, the unfolding holding body 3121 includes a holding portion 31211 and a connecting portion 31212, the connecting portion 31212 is mounted on the supporting assembly 12, the holding portion 31211 is mounted on the side of the connecting portion 31212, and the rotating member 3122 is rotatably mounted on the holding portion 31211. A pair of the holding portions 31211 are configured to rotate toward or away from each other and drive the rotating member 3122 connected thereto to rotate together.

[0033] When the double-layer folding material rack is in the unfolded state, the holding portion 31211 and the rotating member 3122 rotated toward each other are located between the bottom-layer placing platform 11 and the top-layer placing seat 20, and the distance between the pair of rotating members 3122 is less than the length of the top-layer placing seat 20. The top-layer placing seat 20 is supported by the rotating member 3122 and is placed at a predetermined height above the bottom-layer placing platform 11. After the top-layer placing seat 20 rotates away from the rotating member 3122 with the adjusting member 3111 as the rotating axis and is guided to slide down by the cooperation of the adjusting member 3111 and the guide groove 3112, the pair of rotating members 3122 rotated toward each other are maintained on both sides of the top-layer placing seat 20, and the distance between the pair of rotating members 3122 is greater than the length of the top-layer placing seat 20. The top-layer placing seat 20 can rotate between the pair of rotating members 3122 to rotate to or away from the surface of the bottom-layer placing platform 11. In this process, the interference between the top-layer placement seat 20 and the rotating member 3122 can be effectively avoided, the design requirements of the double-layer folding material rack are reduced, and the structures can be flexibly matched.

[0034] Preferably, the connecting portion 31212 is rotatably mounted on the supporting assembly 12 , and the retaining portion 31211 can rotate coaxially and synchronously with the connecting portion 31212 .

[0035] Preferably, the support assembly 12 has a stopper 121, and the stopper 121 is located outside the holding portion 31211. A pair of the stopper 121 of the support assembly 12 is arranged opposite to each other, and the distance between the pair of the stopper 121 is greater than the distance between the ends of the pair of holding portions 31211 that are respectively far from the corresponding connecting portion 31212 after the pair of the holding portions 31211 rotate toward each other, and is smaller than the distance between the ends of the pair of the holding portions 31211 that are respectively close to the corresponding connecting portion 31212 after the pair of the holding portions 31211 rotate toward each other. The pair of the stopper 121 can limit the angle of rotation of the pair of holding portions 31211 toward each other and support the holding portions 31211 after the rotation, so as to ensure that the rotating member 3122 connected to the holding portion 31211 can support the top layer placement seat 20.

[0036] refer to Figure 1 and Figure 3The top-level placement seat 20 includes a top-level placement platform 21 and a pair of connecting components 22, the adjusting member 3111 is arranged on the top-level placement platform 21, and a pair of connecting components 22 are arranged at opposite intervals on both sides of the top-level placement platform 21, and the top-level placement platform 21 is used to carry materials. Each of the connecting components 22 is rotatably mounted on a supporting component 12. When the top-level placement platform 21 is supported by the bottom-level placement platform 11, a pair of the connecting components 22 can be driven to rotate toward each other to rotate to the upper surface of the top-level placement platform 21 or rotate away from each other to rotate to the direction in which the corresponding supporting component 12 extends upward. In this way, by rotating the connecting component 22, the overall folding degree is increased and the space occupied by the whole in the vertical direction is reduced as much as possible. The supporting component 12 has a blocked portion 122, and the state adjustment mechanism 30 also includes a pair of second state adjustment components 32, each of which is movably mounted on a connecting component 22. When the connecting component 22 is located in the direction in which the supporting component 12 extends upward, the second state adjusting member 32 can move up and down to abut against or separate from the blocked portion 122. The blocked portion 122 abuts against the second state adjusting member 32 to prevent the connecting component 22 from turning to the top-level placement platform 21 supported by the bottom-level placement platform 11, so that the top-level placement platform 21 can be adjusted to be placed at a predetermined height above the bottom-level placement platform 11. When the top-level placement platform 21 is located at a predetermined height above the bottom-level placement platform 11, the connecting component 22 located in the direction in which the supporting component 12 extends upward protects the materials on the top-level placement platform 21 to prevent the materials on the side of the top-level placement platform 21 from being accidentally touched and moving or even rolling down.

[0037] Furthermore, at least one slot 1201 is formed at the bottom end of the support component 12, and the size of the slot 1201 matches the size of the top end of the connecting component 22. When at least two of the double-layer folding racks are in the unfolded state, one of the double-layer folding racks can be stacked with another double-layer folding rack in a manner that its support component 12 is sleeved on the top end of the connecting component 22 of the other double-layer folding rack through the cooperation of the slot 1201 and the top end of the connecting component 22, so that at least two of the double-layer folding racks carrying materials can be stacked and placed, greatly reducing the overall occupancy in the horizontal space.

[0038] Preferably, the support component 12 forms a plug-in portion 123 in the slot 1201. When the top of the connecting component 22 of one double-layer folding rack is plugged into the slot 1201 of another double-layer folding rack, the plug-in portion 123 is inserted into the top of the connecting component 22 to further improve the stability of stacking at least two double-layer folding racks.

[0039] refer to Figure 1 , Figure 4 and Figure 5 The double-layer folding material rack includes a material pressing unit 40, and the material pressing unit 40 includes a first material pressing mechanism 41. The first material pressing mechanism 41 includes a first material pressing piece 411 and a pair of first locking components 412. Each of the first locking components 412 is installed with a connecting component 22. The first material pressing piece 411 is locked to the top of the material supported by the top-level placement platform 21 in a horizontal manner through a pair of the first locking components 412 and presses on the material to vertically fix the material supported by the top-level placement platform 21 to prevent the material from shaking vertically, thereby improving the stability and safety of the material during transportation.

[0040] The first locking member 412 includes a first locking component 4121 and a first card insertion component 4122, the first locking component 4121 includes a pressure piece 41211, a first locking component 41212 and a first elastic component 41213, the pressure piece 41211 is rotatably mounted on the connecting component 22, the first locking component 41212 is telescopically mounted on an end of the pressure piece 41211 away from its rotation axis, and the two ends of the first elastic component 41213 are respectively connected to the first locking component 41212 and the pressure piece 41211. The first card insertion component 4122 has at least one first card slot 412201. The first card insertion component 4122 is installed on the connecting component 22 and is located on the outer periphery of the pressure piece 41211. The first locking component 41212 retracts and compresses the first elastic component 41213 between it and the pressure piece 41211 by an external force, and rotates together with the pressure piece 41211 to correspond to the first card slot 412201 of the first card insertion component 4122. At this time, the first locking component 41212 is freed from the external force and extends into the first card slot 412201 under the elastic force of the first elastic component 41213 to lock the pressure piece 41211 and the first pressing piece 411 pressed by the pressure piece 41211, ensuring that the material carried by the top placement table 21 can remain stable in the vertical direction.

[0041] Preferably, the first elastic member 41213 is implemented as a spring.

[0042] Preferably, a plurality of the first slots 412201 are provided, and the plurality of the first slots 412201 are spaced apart and centered around the rotation axis of the pressure member 41211. The first locking member 41212 is engaged with the first slots 412201 at different heights to lock the pressure member 41211 at different heights, thereby enabling the first material pressing member 411 pressed by the pressure member 41211 to fix materials at different heights.

[0043] Preferably, one end of the first pressing piece 411 forms a clamping shaft 4111, wherein one of the connecting components 22 forms a chute 2201. When the connecting component 22 is maintained in the direction in which the supporting component 12 extends upward, the chute 2201 has a predetermined length in the vertical direction, and the clamping shaft 4111 is clamped to the chute 2201 so as to be movable up and down, so that the height of the first pressing piece 411 can adapt to the height of the material carried by the top-level placement platform 21, and the first pressing piece 411 is connected to the connecting component 22 formed with the chute 2201, effectively avoiding the first pressing piece 411 from being lost due to its scattered design. The first pressing piece 411 can rotate with the clamping shaft 4111 as the rotating shaft to be horizontally maintained above the top-level placement platform 21 or vertically stand on the side of the top-level placement platform 21. The first pressing piece 411 is vertically placed on the side of the top-layer placing table 21 so that the top-layer placing table 21 is stacked on the bottom-layer placing table 11 .

[0044] refer to Figure 6 to Figure 7 The pressing unit 40 further includes a second pressing mechanism 42, which includes a second pressing piece 421 and at least one second locking member 422, and the second pressing piece 421 and the second locking member 422 are both arranged at the bottom of the top placement platform 21. When the top placement platform 21 is located at a predetermined height above the bottom placement platform 11, the second pressing piece 421 can be locked by the second locking member 422 to the top of the material carried by the bottom placement platform 11 and pressed on the material, so as to fix the material carried by the bottom placement platform 11 in the vertical direction, so as to prevent the material from shaking vertically, and increase the stability and safety of the material during transportation.

[0045] The second locking member 422 includes a second locking component 4221 and a second card insertion component 4222. Either the second locking component 4221 or the second card insertion component 4222 is installed at the bottom of the top-level placement platform 21, and the other is installed at the second pressing piece 421. The second pressing piece 421 extends a predetermined length between a pair of the supporting components 12. The second pressing piece 421 is rotatably installed at the bottom of the top-level placement platform 21. The second locking component 4221 includes a connecting piece 42211, a second locking piece 42212 and a second elastic piece 42213. The connecting piece 42211 is installed at the top-level placement platform 21 or the second pressing piece 421. The second locking piece 42212 is telescopically installed at the connecting piece 42211. The two ends of the second elastic piece 42213 are respectively connected to the second locking piece 42212 and the connecting piece 42211. The second card insertion component 4222 has at least one second card slot 422201, and the second card insertion component 4222 is installed on the outer periphery of the second locking member 422. Either the second locking component 4221 or the second card insertion component 4222 can rotate together with the second pressing member 421 so that the second locking member 42212 that is retracted by the external force corresponds to the second card slot 422201 of the second card insertion component 4222. At this time, the second locking member 42212 is removed from the external force so that the second locking member 42212 extends into the second card slot 422201 under the elastic force of the compressed second elastic member 42213 to lock the height of the second pressing member 421, so that the second pressing member 421 can remain pressed against the material carried by the bottom placement platform 11, ensuring that the material carried by the bottom placement platform 11 can remain stable in the vertical direction.

[0046] Preferably, the second elastic member 42213 is implemented as a spring.

[0047] Preferably, the second card slots 422201 are provided in plurality and are arranged at intervals in the vertical direction. The second locking member 42212 is engaged with the second card slots 422201 at different heights to lock the second material pressing member 421 at different heights, thereby enabling the second material pressing member 421 to fix materials at different heights.

[0048] Preferably, the second locking assembly 4221 is installed on the second pressing piece 421 , and the second card inserting assembly 4222 is installed on the top placement platform 21 .

[0049] refer to Figure 1The bottom placement platform 11 includes a bottom platform body 111 and a plurality of first positioning components 112. The support component 12 is installed on the bottom platform body 111. The first positioning component 112 is installed on the bottom platform body 111 and is located between a pair of the support components 12. The first positioning component 112 is used to position the material carried by the bottom platform body 111.

[0050] The first positioning assembly 112 includes a first positioning member 1121 and a first limiting member 1122. The first positioning member 1121 and the first limiting member 1122 are relatively installed on the bottom platform 111. The first positioning member 1121 and the first limiting member 1122 are respectively adapted to the shapes and sizes of the two ends of the material. The material is carried by the bottom platform 111 in a manner that one end is half-wrapped by the first positioning member 1121 and the other end is overlapped with the first limiting member 1122, so as to limit the material in the horizontal direction.

[0051] It is worth mentioning that the first positioning member 1121 and the first limiting member 1122 are both detachable. By replacing the first positioning member 1121 and the first limiting member 1122 of different models, the bottom placement seat 10 can carry different types of materials, avoiding unnecessary costs caused by multiple developments.

[0052] Preferably, each of the first positioning members 1121 has a first positioning protrusion 11211, and the size of the first positioning protrusion 11211 matches the size of the material insertion hole. When the two ends of the material are limited by the first positioning members 1121 and the first limiting members 1122, the first positioning protrusion 11211 is inserted into the material insertion hole to further limit the material to prevent the material from moving in the horizontal direction.

[0053] The top-level placement platform 21 includes a top-level platform body 211 and a plurality of second positioning components 212. The connecting component 22 is installed on the top-level platform body 211. The second positioning component 212 is installed on the top-level platform body 211 and is located between a pair of the connecting components 22. The second positioning component 212 is used to position the material carried by the top-level platform body 211.

[0054] The second positioning assembly 212 includes a second positioning member 2121 and a second limiting member 2122. The second positioning member 2121 and the second limiting member 2122 are relatively mounted on the top platform 211. The second positioning member 2121 and the second limiting member 2122 are respectively adapted to the shapes and sizes of the two ends of the material. The material is carried by the top platform 211 in a manner that one end is half-wrapped by the second positioning member 2121 and the other end is overlapped with the second limiting member 2122, so as to limit the material in the horizontal direction.

[0055] It is worth mentioning that the second positioning member 2121 and the second limiting member 2122 are both detachable. By replacing different types of the second positioning member 2121 and the second limiting member 2122, the top-level placement seat 20 can carry different types of materials, thereby avoiding unnecessary costs caused by multiple developments.

[0056] Preferably, the second positioning member 2121 has a second positioning protrusion 21211, and the size of the second positioning protrusion 21211 matches the size of the material insertion hole. When the two ends of the material are respectively limited by the second positioning member 2121 and the second limiting member 2122, the second positioning protrusion 21211 is inserted into the material insertion hole to further limit the material to prevent the material from moving in the horizontal direction.

[0057] refer to Figure 1 The double-layer folding material rack also includes at least one marking piece 50. The bottom placement seat 10 and the top placement seat 20 are arbitrarily provided with the marking piece 50. The marking piece 50 is used to display the information of the material to facilitate the identification of the material information.

[0058] Preferably, the marking piece 50 is configured to be able to affix material information identification.

[0059] It should be understood by those skilled in the art that the embodiments of the present invention described above and shown in the accompanying drawings are only examples and do not limit the present invention. The advantages of the present invention have been fully and effectively realized. The functions and structural principles of the present invention have been demonstrated and explained in the embodiments, and the embodiments of the present invention may be deformed or modified in any way without departing from the principles.

Claims

1. Double-layer folding rack, characterized in that: The double-layer folding material rack has an unfolded state and a folded state, and the double-layer folding material rack comprises: A bottom layer placement seat, the bottom layer placement seat comprises a bottom layer placement table and a pair of support components, the pair of support components are relatively spaced apart and arranged at two opposite edges of the bottom layer placement table and extend upward from the upper surface of the bottom layer placement table by a predetermined length, and the bottom layer placement table is used to carry materials; A top layer placement seat, the top layer placement seat is used to carry materials; The state adjustment mechanism comprises a first state adjustment component, the first state adjustment component comprises a pair of state adjustment components and a pair of unfolding and holding components, the pair of unfolding and holding components are installed on a pair of support components, the state adjustment component comprises an adjustment piece and a guide groove, the adjustment piece is clamped in the guide groove, the guide groove has a predetermined length in the vertical direction, the adjustment piece and the guide groove are respectively arranged on the top-level placement seat and the support component, when the double-layer folding material rack is in the unfolded state, the adjustment piece is clamped in the high end of the guide groove, the top-level placement seat is supported by the unfolding and holding components The top-layer placing seat is arranged at a predetermined height above the bottom-layer placing table in a manner. At this time, the material can be placed on the bottom-layer placing seat through the space between the top-layer placing seat and the bottom-layer placing seat. The top-layer placing seat can be rotated away from the unfolding and holding assembly with the adjusting member as the rotating shaft and guided to slide down through the cooperation of the adjusting member and the guide groove, so that the adjusting member slides from the high end of the guide groove to the low end. Then, the top-layer placing seat can be rotated to the surface of the bottom-layer placing table with the adjusting member located at the low end of the guide groove as the rotating shaft and be carried by the bottom-layer placing table. At this time, the double-layer folding material rack is transformed from the use state to the folded state.

2. The double-layer folding rack according to claim 1, characterized in that: The unfolding and holding assembly includes an unfolding and holding body and a rotating member, the unfolding and holding body being installed on the supporting assembly, and the rotating member being rotatably installed on the unfolding and holding body. In the process of the double-layer folding material rack being transformed from a folded state to a use state, the top layer placement seat that is turned away from the bottom layer placement table by an external force can be guided to slide up through the cooperation of the adjusting member and the guide groove, and at the same time rotates with the adjusting member as the rotating shaft to overlap the rotating member and slide obliquely on the surface of the rotating member with the rotating member as the fulcrum until it is horizontally placed on the rotating member, and the rotating member is driven to rotate by the top layer placement seat sliding on its surface.

3. The double-layer folding rack according to claim 2, characterized in that: The unfolding and holding body comprises a holding portion and a connecting portion, the connecting portion being installed in the supporting assembly, the holding portion being installed in the side portion of the connecting portion, the rotating member being rotatably installed in the holding portion, and a pair of the holding portions being arranged to be able to rotate towards or away from each other and drive the rotating member connected thereto to rotate together. When the double-layer folding material rack is in an unfolded state, the holding portion and the rotating member, after rotating towards each other, are located between the bottom placement platform and the top placement seat, and the distance between the pair of rotating members is less than the length of the top placement seat. The top placement seat is supported by the rotating member and placed at a predetermined height above the bottom placement platform. After the top placement seat rotates away from the rotating member with the adjusting member as the rotating axis and is guided to slide down through the cooperation of the adjusting member and the guide groove, the pair of rotating members, after rotating towards each other, are maintained on both sides of the top placement seat, and the distance between the pair of rotating members is greater than the length of the top placement seat, and the top placement seat can rotate between the pair of rotating members to rotate to or away from the surface of the bottom placement platform.

4. The double-layer folding rack according to claim 3, characterized in that: The supporting assembly comprises a stop portion, which is located outside the retaining portion. A pair of the stop portions of the supporting assembly are arranged opposite to each other, and a distance between the pair of the stop portions is larger than a distance between one end portion of the pair of retaining portions after they are rotated toward each other and away from the corresponding connecting portion, but smaller than a distance between one end portion of the pair of retaining portions after they are rotated toward each other and close to the corresponding connecting portion. The pair of the stop portions can limit the relative rotation angle of the pair of retaining portions and support the rotating retaining portions.

5. The double-layer folding rack according to claim 1, characterized in that: The top-level placement seat includes a top-level placement table and a pair of connecting components, the adjusting member is arranged on the top-level placement table, the pair of connecting components are arranged at opposite sides of the top-level placement table at a relative interval, the top-level placement table is used to carry materials, each of the connecting components is rotatably installed on a supporting component, and when the top-level placement table is supported by the bottom-level placement table, the pair of connecting components can be driven to rotate toward each other to rotate to the upper surface of the top-level placement table or rotate away from each other to rotate to the direction in which the corresponding supporting component extends upward, the supporting component has a blocking portion, and the state adjustment mechanism also includes a pair of first Two state adjustment components, each of the second state adjustment components is movably installed with a connecting component, and when the connecting component is located in the direction in which the supporting component extends upward, the second state adjustment component can move up and down to abut or separate from the blocked portion, and the blocked portion abuts against the second state adjustment component to prevent the connecting component from turning to the top placement table supported by the bottom placement table, and when the top placement table is located at a predetermined height above the bottom placement table, the connecting component located in the direction in which the supporting component extends upward protects the material on the top placement table.

6. The double-layer folding rack according to claim 5, characterized in that: At least one slot is formed at the bottom end of the supporting component, and the size of the slot is matched with the size of the top end of the connecting component. When at least two of the double-layer folding racks are in the unfolded state, one of the double-layer folding racks can be stacked with another double-layer folding rack in a manner that its supporting component is sleeved on the top end of the connecting component of the other double-layer folding rack through the cooperation of the slot and the top end of the connecting component.

7. The double-layer folding rack according to claim 5 or 6, characterized in that: The double-layer folding material rack includes a material pressing unit, which includes a first material pressing mechanism. The first material pressing mechanism includes a first material pressing piece and a pair of first locking components. Each of the first locking components is installed with a connecting component. The first material pressing piece is locked to the top of the material supported by the top placement table in a horizontal manner through a pair of the first locking components and presses on the material.

8. The double-layer folding rack according to claim 7, characterized in that: The pressing unit also includes a second pressing mechanism, which includes a second pressing piece and at least one second locking component. The second pressing piece and the second locking component are both arranged at the bottom of the top placement table. When the top placement table is located at a predetermined height above the bottom placement table, the second pressing piece can be locked by the second locking component to the top of the material carried by the bottom placement table and pressed on the material.

9. The double-layer folding rack according to claim 5, characterized in that: The top-level placement platform includes a top-level platform body and a plurality of second positioning components, the connecting component is installed on the top-level platform body, the second positioning component is installed on the top-level platform body and is located between a pair of the connecting components, and the second positioning component is used to position the material carried by the top-level platform body.

10. The double-layer folding rack according to claim 1, characterized in that: The bottom placement table includes a bottom platform body and a plurality of first positioning components, the support component is installed on the bottom platform body, the first positioning component is installed on the bottom platform body and is located between a pair of the support components, and the first positioning component is used to position the material carried by the bottom platform body.

Images