CN220375266U - Stacking system - Google Patents

Abstract

The application relates to a stacking system, which comprises a first stacking piece, a second stacking piece, a first connecting component and a second connecting component, wherein the first connecting component is arranged on the first stacking piece, and the second connecting component is arranged on the second stacking piece; the first connecting component and the second connecting component are matched with each other, can connect the first stacking piece and the second stacking piece, and limit the movement of the first stacking piece relative to the second stacking piece at least in the Z direction. According to the stacking system provided by the utility model, the first stacking piece and the second stacking piece can be stably connected at least in the Z direction through the first connecting component and the second connecting component, so that good transportation stability can be kept after stacking, and the stacking system can not collapse easily under the condition of fully utilizing the storage space during storage, and the potential safety hazard during storage is effectively reduced.

Description

Stacking system

Technical Field

The present disclosure relates to stacking technology, and in particular, to a stacking system.

Background

Generally, when articles are transported or stored, the occupied space is reduced in a stacking mode, and the articles are convenient to carry and transport. However, the stacked articles are easy to separate from each other due to shaking or collision, so that the transportation stability is difficult to maintain, and the safety risk is high during storage.

Disclosure of Invention

Based on this, it is necessary to provide a stacking system.

A stacking system comprises a first stacking piece, a second stacking piece, a first connecting component and a second connecting component, wherein the first connecting component is arranged on the first stacking piece, and the second connecting component is arranged on the second stacking piece; the first connecting assembly and the second connecting assembly are matched with each other, can connect the first stacking piece and the second stacking piece, and limit the movement of the first stacking piece relative to the second stacking piece at least in the Z direction.

In one embodiment of the present utility model, the first connection assembly includes a first mating structure and a second mating structure disposed opposite each other, the second connection assembly includes a third mating structure and a fourth mating structure disposed opposite each other, and the first mating structure and the second mating structure are located at a bottom of the first stack; the third matching structure and the fourth matching structure are positioned on the top of the same second stacking piece or on the top of two second stacking pieces respectively;

the stacking system has a locked state in which one of the first mating structure and the second mating structure is capable of mating with the third mating structure and the other is capable of mating with the fourth mating structure.

In one embodiment of the present utility model, the first matching structure includes a movable member and an elastic member, wherein the movable member is movably mounted on the first stacking member, and the elastic member is mounted on the first stacking member and elastically acts on the movable member;

when the first stacking piece is stacked to the second stacking piece and pressed by external force, the movable piece can move on the first stacking piece, so that when the first stacking piece is stacked in place, the movable piece can return under the elastic action of the elastic piece and is matched with the third matching structure or the fourth matching structure to form the locking state.

In one embodiment of the present utility model, a first bending clamping plate is disposed on a side of the movable member, which is relatively far from the top of the first stacking member, the second matching structure includes a second bending clamping plate disposed at the bottom of the first stacking member, and the third matching structure and the fourth matching structure both have clamping grooves; under the condition that the second bending clamping plate is clamped with the fourth matching structure or the third matching structure, the first bending clamping plate can be clamped with the third matching structure or the fourth matching structure.

In one embodiment of the present utility model, the clamping groove of the third matching structure and the clamping groove of the fourth matching structure are provided with a notch, and the notches of the two notches are arranged oppositely; when the first matching structure and the second matching structure are mutually clamped with the third matching structure and the fourth matching structure, the relative movement of the first stacking piece and the second stacking piece in the X, Y, Z directions is limited.

In one embodiment of the present utility model, a side of the first bending clamping plate relatively far from the top of the first stacking piece has a first guiding inclined plane, a side of the third matching structure and the fourth matching structure relatively far from the top of the second stacking piece has a second guiding inclined plane which is in slope matching with the first guiding inclined plane, and when the first stacking piece is stacked on the second stacking piece, the clamping leg of the first bending clamping plate can be clamped into the clamping groove of the third matching structure or the clamping groove of the fourth matching structure under the matching of the first guiding inclined plane and the second guiding inclined plane.

In one embodiment of the utility model, the moveable member is slidably mounted to the first stack member.

In one embodiment of the present utility model, the sliding direction of the movable member is perpendicular to the side wall of the first stacking member, and the movable member moves toward the center of the first stacking member when the first stacking member is stacked to the second stacking member and pressed by an external force.

In one embodiment of the present utility model, the sliding direction of the movable member is perpendicular to the side wall of the first stacking member, and the movable member moves away from the center of the first stacking member when the first stacking member is stacked to the second stacking member and pressed by an external force.

In one embodiment of the present utility model, the sliding direction of the movable member is parallel to the side wall of the first stacking member, and the movable member moves along the side wall of the first stacking member when the first stacking member is stacked to the second stacking member and pressed by an external force.

In one embodiment of the utility model, the moveable member is rotatably mounted to the first stack member.

In one embodiment of the present utility model, the movable member includes a rotating plate and a rotating shaft, the rotating plate is rotatably mounted on the first stacking member through the rotating shaft, and the rotating plate includes a first movable arm and a second movable arm that are connected to each other; under the action of force, the first movable arm and the second movable arm can rotate in opposite directions by taking the rotating shaft as a rotating pivot;

One side of the first movable arm is abutted to the first stacking piece, one side of the second movable arm is abutted to the elastic piece, a first bending clamping plate is arranged on one side, opposite to the elastic piece, of the second movable arm, the second matching structure comprises a second bending clamping plate arranged at the bottom of the first stacking piece, and the third matching structure and the fourth matching structure are respectively provided with a clamping groove; under the condition that the second bending clamping plate is clamped with the fourth matching structure or the third matching structure, the first stacking piece is pressed, and the first bending clamping plate can be clamped with the third matching structure or the fourth matching structure.

In one embodiment of the present utility model, the second mating structure includes a bump disposed at a bottom of the first stack, and the fourth mating structure includes a groove disposed at a top of the second stack; the second mating portion and the fourth mating portion being capable of restricting movement of the first stack relative to the second stack in an X-direction and a Y-direction; the first engagement structure and the third engagement structure cooperate to at least limit movement of the first stack relative to the second stack in the Z-direction.

In one embodiment of the present utility model, the first matching structure includes a movable member and an elastic member, wherein the movable member is movably mounted on the first stacking member, and the elastic member is mounted on the first stacking member and elastically acts on the movable member;

when the first stacking piece is stacked to the second stacking piece and pressed by external force, the movable piece can move on the first stacking piece, so that when the first stacking piece is stacked in place, the movable piece can return under the elastic action of the elastic piece and is matched with the third matching structure to form the locking state.

In one embodiment of the present utility model, the stacking system further comprises an unlocked state in which the movable member is capable of being disengaged from the third engagement structure or the fourth engagement structure by an external force to enable the first stack to be disengaged from the second stack.

In one embodiment of the present utility model, the bottom of the second stack is further provided with the first mating structure and the second mating structure opposite to each other, and the top of the first stack is further provided with the third mating structure and the fourth mating structure opposite to each other.

In one embodiment of the present utility model, the first stacking piece includes a first box body and a second box body, where the first box body and the second box body can form a storage cavity after being buckled with each other; the first stacking piece further comprises a locking structure, one side of the first box body is rotatably connected to one side of the second box body, and the other side of the first box body is locked and buckled with the other side of the second box body through the locking structure; the locking structure is located relatively on a peripheral side of the second stack when the first stack is stacked to the second stack.

In one embodiment of the present utility model, a plurality of groups of the second connection assemblies are disposed on top of the second stacking member, and a preset interval is provided between two adjacent groups of the second connection assemblies, where the preset interval is used to enable the first boxes of two adjacent first stacking members to rotate and open relative to the second boxes.

In one embodiment of the present utility model, the preset distance may enable the first case of the first stack to be turned to open and close by an angle greater than or equal to 90 ° with respect to the second case.

In one embodiment of the present utility model, the second stacking member is provided with a through hole to form a handle portion, and the handle portion is located in a region where the second stacking member is provided with the preset interval.

Compared with the prior art, the stacking system provided by the utility model can ensure that the first stacking piece and the second stacking piece are stably connected at least in the Z direction through the first connecting component and the second connecting component, so that good transportation stability can be maintained after stacking, and the stacking system can not collapse easily under the condition of fully utilizing the storage space during storage, thereby effectively reducing potential safety hazards during storage.

Drawings

In order to more clearly illustrate the technical solutions of embodiments or conventional techniques of the present application, the drawings that are required to be used in the description of the embodiments or conventional techniques will be briefly described below, and it is apparent that the drawings in the following description are only some embodiments of the present application, and other drawings may be obtained according to these drawings without inventive effort for a person of ordinary skill in the art.

Fig. 1 is a schematic structural diagram of a stacking system according to a first embodiment of the present utility model;

FIG. 1a is an enlarged schematic view of the stacking system of FIG. 1 at Q;

FIG. 2 is a schematic top view of the stacking system of FIG. 1;

FIG. 3 is a schematic cross-sectional view of the stacking system of FIG. 2 with A-A as a cross-sectional line;

FIG. 4 is an enlarged schematic view of the stacking system of FIG. 3 at L;

FIG. 5 is an enlarged schematic view of the stacking system of FIG. 3 at M;

FIG. 6 is a schematic cross-sectional view of the stacking system of FIG. 2 with B-B as a cross-sectional line;

FIG. 7 is an enlarged schematic view of the stacking system of FIG. 6 at N;

FIG. 8 is a schematic view of the bottom structure of the first stack of FIG. 1;

FIG. 9 is a schematic view of the movable member of FIG. 8;

FIG. 10 is a schematic view of another stacking structure of the stacking system according to the present utility model;

FIG. 11 is a schematic view of another stacking structure of the stacking system according to the present utility model;

FIG. 12 is a schematic view of a first stack of a stacking system according to a second embodiment of the present utility model;

FIG. 13 is a schematic cross-sectional view of the first stack of FIG. 12 with C-C as a cross-sectional line;

FIG. 14 is a schematic view of a stacking system according to a third embodiment of the present utility model;

FIG. 15 is a schematic cross-sectional view of the stacking system of FIG. 14 with D-D as a cut line;

FIG. 16 is a schematic cross-sectional view of the first stack of FIG. 14 with E-E as a cross-sectional line;

FIG. 17 is a schematic view of a first stacking member of a stacking system according to a fourth embodiment of the present utility model;

FIG. 18 is a schematic cross-sectional view of the stacking system of FIG. 17 with F-F as a cut line;

FIG. 19 is a schematic top view of a stacking system according to a fifth embodiment of the present utility model;

FIG. 20 is a schematic cross-sectional view of the stacking system of FIG. 19 with G-G as a cross-sectional line;

fig. 21 is a schematic cross-sectional view of the first stack of fig. 19 with H-H as a cross-sectional line.

Reference numerals: 100. a stacking system; 101. a first case; 102. a second case; 103. a locking structure; 104. presetting a distance; 105. a through hole; 106. a handle part; 107. a storage cavity; 10. a first stack; 11. a mounting cavity; 111. a first notch; 112. a second notch; 20. a second stack; 301. a first guiding inclined surface; 30. a first connection assembly; 31. a first mating structure; 311. an elastic member; 312. a movable member; 3121. the first clamping leg; 3122. a stop block; 3123. avoiding the through groove; 313. a rotating plate; 3131. a first movable arm; 3132. a second movable arm; 314. a rotating shaft; 32. a second mating structure; 321. the second bending clamping plate; 3211. a second clamping leg; 322. a bump; 401. a second guiding inclined surface; 40. a second connection assembly; 41. a third mating structure; 411. a first clamping block; 4111. a first clamping groove; 42. a fourth mating structure; 421. a second clamping groove; 422. a groove; 50. an auxiliary structure; 51. a limit protrusion; 52. and a limit groove.

Detailed Description

In order that the above objects, features and advantages of the utility model will be readily understood, a more particular description of the utility model will be rendered by reference to the appended drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present utility model. The present utility model may be embodied in many other forms than described herein and similarly modified by those skilled in the art without departing from the spirit of the utility model, whereby the utility model is not limited to the specific embodiments disclosed below.

In the description of the present utility model, it should 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", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present utility model.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present utility model, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.

In the present utility model, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

In the present utility model, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be the first and second features in direct contact, or the first and second features in indirect contact via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.

It will be understood that when an element is referred to as being "fixed" or "disposed" on another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like are used herein for illustrative purposes only and are not meant to be the only embodiment.

Generally, when articles are transported or stored, the occupied space is reduced in a stacking mode, and the articles are convenient to carry and transport. However, the stacked articles are easy to separate from each other due to shaking or collision, so that the transportation stability is difficult to maintain, and the safety risk is high during storage.

Based on this, referring to fig. 1, it is necessary to provide a stacking system 100, where the stacking system 100 is commonly used for storing and placing objects, and the stacking system 100 is convenient for storing and transporting, and can avoid the situation that stacking pieces stacked on each other are misplaced and separated from each other.

Specifically, referring to fig. 1 again and also to fig. 1a and fig. 2 to fig. 9, the stacking system 100 includes a first stacking member 10, a second stacking member 20, a first connecting member 30 and a second connecting member 40, wherein the first connecting member 30 is disposed on the first stacking member 10, and the second connecting member 40 is disposed on the second stacking member 20; the first and second connection assemblies 30, 40 cooperate to connect the first and second stacks 10, 20 and to limit movement of the first stack 10 relative to the second stack 20 in at least the Z-direction.

By means of the arrangement, the stacking system 100 provided by the utility model can enable the first stacking piece 10 and the second stacking piece 20 to be stably connected at least in the Z direction through the first connecting component 30 and the second connecting component 40, so that good transportation stability can be kept after stacking, and the stacking system is not easy to collapse under the condition of fully utilizing the storage space during storage, and potential safety hazards during storage are effectively reduced.

It will be appreciated that "maintaining a stable connection in at least the Z-direction" means that the first connection assembly 30 and the second connection assembly 40 cooperate to limit relative displacement between the first stack 10 and the second stack 20 in the Z-direction, or in the X-direction and the Z-direction, or in the Y-direction and the Z-direction, or X, Y and the Z-direction.

Note that, in the Z direction in the present application, the extending direction in which two stacks are stacked on each other, that is, the height direction of the first stack 10 in the present application; one of the X-direction and the Y-direction refers to the length direction of the stack, and the other refers to the width direction of the stack. The specific situation can be set according to the requirement. For example, if the stack is cylindrical, the X-direction and Y-direction may be selectively set.

It will be appreciated that the stacking position of the first stack 10 and the second stack 20 may be selected according to the requirements, and is not limited herein. In addition, the first and second stacks 10 and 20 are each stacks, and the stacking system 100 may include a plurality of stacks stacked in sequence.

It will further be appreciated that the nomenclature of the first stack 10 and the second stack 20 is relative; for example, when three stacks are stacked in order in the Z direction, the middle stack may be the second stack 20 with respect to the stack located therebelow and the first stack 10 with respect to the stack located thereabove.

In the present utility model, the first connection assembly 30 includes a first mating structure 31 and a second mating structure 32 that are disposed opposite to each other, and the second connection assembly 40 includes a third mating structure 41 and a fourth mating structure 42 that are disposed opposite to each other, and the first mating structure 31 and the second mating structure 32 are located at the bottom of the first stack 10; the third mating structure 41 and the fourth mating structure 42 are located on top of the same second stack 20 or on top of two second stacks 20, respectively; the stacking system 100 has a locked state in which one of the first and second mating structures 31, 32 is capable of mating with the third mating structure 41 and the other is capable of mating with the fourth mating structure 42.

For convenience of explanation of the inventive concepts and structures of the present application, the first stack 10 is exemplarily described above and the second stack 20 is exemplarily described below. Referring to fig. 1 to 9 again, in the first embodiment provided by the present utility model, the third mating structure 41 and the fourth mating structure 42 are identical in structure and are disposed opposite to each other, and in the locked state, the first mating structure 31 can be mated with the third mating structure 41 or the fourth mating structure 42, and the second mating structure 32 can be mated with the fourth mating structure 42 or the third mating structure 41.

In other words, the first engaging structure 31 and the second engaging structure 32 may be engaged with the third engaging structure 41 and the fourth engaging structure 42, respectively, or may be engaged with the fourth engaging structure 42 and the third engaging structure 41, respectively. When the first stacking piece 10 is stacked, the stacking direction of the first stacking piece 10 can be freely changed according to the requirement, so that a user can conveniently and rapidly stack and connect the first stacking piece 10 and the second stacking piece 20, the stacking efficiency is improved, and the problem that whether the stacking direction is correct or not and excessive time is consumed is avoided.

In the present embodiment, the X direction refers to the length direction of the first stack 10, the Y direction refers to the width direction of the first stack 10, and the Z direction refers to the height direction of the first stack 10, referring to the coordinate system schematically shown in fig. 1.

Referring again to fig. 2-9, further, in the present embodiment, the stacking system 100 can be brought into a locked state by pressing by an external force. Specifically, the first matching structure 31 includes a movable member 312 and an elastic member 311, the movable member 312 is movably mounted on the first stacking member 10, and the elastic member 311 is mounted on the first stacking member 10 and elastically acts on the movable member 312; when the first stacking member 10 is stacked to the second stacking member 20 and pressed by an external force, the movable member 312 can move on the first stacking member 10, so that when the first stacking member 10 is stacked in place, the movable member 312 can return under the elastic action of the elastic member 311 and cooperate with the third cooperation structure 41 or the fourth cooperation structure 42 to form a locking state.

So set up, can apply the pressure to first stack 10 through the mode of pressing and form locking state fast, connect first stack 10 and second stack 20, effectively reduced the loaded down with trivial details degree of stacking and locking two adjacent stacks, effectively improved work efficiency and stack the convenience of location.

Referring to fig. 8 again, optionally, in the present embodiment, a first bending clamping plate is disposed on a side of the movable member 312 relatively far from the top of the first stacking member 10, the second matching structure 32 includes a second bending clamping plate 321 disposed at the bottom of the first stacking member 10, and the third matching structure 41 and the fourth matching structure 42 each have a clamping slot; in the case that the second bending clamping plate 321 is clamped with the fourth matching structure 42 or the third matching structure 41, the first bending clamping plate can be clamped with the third matching structure 41 or the fourth matching structure 42.

So set up, during the use, can earlier with the second cardboard 321 of buckling go into the joint groove of third cooperation structure 41 or the joint groove of fourth cooperation structure 42, and then press first stack 10 makes first cardboard of buckling can card into the joint groove of fourth cooperation structure 42 or the joint groove of third cooperation structure 41. It should be noted that, for ease of understanding, in the present embodiment, the clamping groove of the third mating structure 41 may be referred to as a first clamping groove 4111, and the clamping groove of the fourth mating structure 42 may be referred to as a second clamping groove 421.

Referring to fig. 3 to 7 again, in this embodiment, optionally, the third matching structure 41 is a first clamping block 411 protruding from the top surface of the second stacking member 20, a first clamping groove 4111 is formed on a side wall of the first clamping block 411, and the fourth matching structure 42 is a second clamping block protruding from the second stacking member 20, and a second clamping groove 421 is formed on a side wall of the second clamping block opposite to the first clamping block 411; preferably, the notch of the first clamping groove 4111 is opposite to the notch of the second clamping groove 421, and faces the two opposite side walls of the second stack 20. Correspondingly, the first bending clamping plate has a first clamping leg 3121, the second bending clamping plate 321 has a second clamping leg 3211, and the clamping direction of the first clamping leg 3121 is opposite to the clamping direction of the second clamping leg 3211 so as to be respectively clamped into the first clamping groove 4111 and the second clamping groove 421.

It is understood that in other embodiments, the second mating structure 32 may be the same as the first mating structure 31, that is, the second mating structure 32 may also have a movable member 312 and an elastic member 311. When so set up, the first cardboard of buckling of first cooperation structure 31 and the first cardboard of buckling of second cooperation structure 32 can be simultaneously with two joint grooves looks joint under the pressing of external force. It will be appreciated that in this manner, it is desirable to provide clearance for the moveable member 312 to unlock.

Referring to fig. 1 again, optionally, in this embodiment, the clamping groove of the third mating structure 41 and the clamping groove of the fourth mating structure 42 have a notch, and the notches of the two notches are opposite to each other; when the first engaging structure 31 and the second engaging structure 32 are engaged with the third engaging structure 41 and the fourth engaging structure 42, the relative movement of the first stacking member 10 and the second stacking member 20 in the directions X, Y, Z is limited.

It will be appreciated that in this embodiment, the relative movement of X, Y, Z in all three directions is limited, i.e., the first and second stacks 10 and 20 cannot be displaced relative to each other in the left-right, front-back, up-down, and tilt directions.

In other words, in the present embodiment, the clamping groove has a notch, and the plane of the notch is parallel to the side wall of the second stack 20; the first clamping groove 4111 of the third mating structure 41 and the second clamping groove 421 of the fourth mating structure 42 can restrict movement of the first stack 10 relative to the second stack 20 in the Z direction by the upper and lower sidewalls, restrict movement of the first stack 10 relative to the second stack 20 in the Y direction by the two sidewalls in the width direction, and restrict movement of the first stack 10 relative to the second stack 20 in the X direction by the sidewall in the length direction of the first clamping groove 4111 and the sidewall in the length direction of the second clamping groove 421.

It will be appreciated that in other embodiments, the direction in which the first stack 10 is movable relative to the second stack 20 may also be selectively limited by altering the number of side walls of the snap-in groove. For example, the two sides of the clamping groove along the width direction are not provided with side walls, so that the first stacking piece 10 can be limited to move along the X direction and the Z direction relative to the second stacking piece 20. Not illustrated herein.

Referring to fig. 4 again, further, in the present embodiment, a side of the first bending card relatively far from the top of the first stacking member 10 has a first guiding inclined plane 301, a side of the third matching structure 41 and/or the fourth matching structure 42 relatively far from the top of the second stacking member 20 has a second guiding inclined plane 401 matching with the first guiding inclined plane 301 in an inclination manner, and when the first stacking member 10 is stacked onto the second stacking member 20, the clamping leg of the first bending card can be clamped into the clamping groove of the third matching structure 41 or the clamping groove of the fourth matching structure 42 under the cooperation of the first guiding inclined plane 301 and the second guiding inclined plane 401.

So set up, can be convenient for first cardboard and the second cardboard 321 of buckling get into corresponding joint groove under the effect fast.

Further, the stacking system 100 further includes an unlocked state in which the movable member 312 can be disengaged from the third engagement structure 41 or the fourth engagement structure 42 by an external force, so that the first stacking member 10 can be disengaged from the second stacking member 20.

Referring to fig. 1 and 8 again, the bottom of the first stacking member 10 is provided with a mounting cavity 11, the mounting cavity 11 has a first notch 111 and a second notch 112, the first notch 111 faces the bottom of the first stacking member 10, the second notch 112 faces the side of the first stacking member 10, the movable member 312 is movably mounted in the mounting cavity 11, and a side of the movable member 312 opposite to the side facing away from the elastic member 311 faces the second notch 112. The first notch 111 is used for enabling the first bending clamping plate to be clamped into the clamping groove, and the second notch 112 is used for enabling a user to apply force to the movable piece 312 so as to form an unlocking state.

It will be appreciated that the length and width of the first notch 111 can allow the first bending clamping plate and the clamping groove to be clamped with each other, but the length and width are smaller than the overall length and width of the movable member 312, so as to limit the movable member 312 from falling out of the mounting cavity 11. The length and width of the second slot 112 are such that a portion of the moveable member 312 is exposed for a person to apply a force to the moveable member 312.

Optionally, in this embodiment, the movable member 312 is provided with a through slot 3123, the first clamping leg 3121 of the first bending clamping plate is in the through slot 3123, and the first clamping block 411 of the third mating structure 41 can enter the through slot 3123, so that the first clamping leg 3121 and the first clamping slot 4111 can be mutually clamped.

In this embodiment, the movable member 312 is slidably mounted to the first stack 10. The sliding connection is simple and quick, and the operation is convenient.

Further, in the present embodiment, the sliding direction of the movable member 312 is perpendicular to the side wall of the first stack 10, and when the first stack 10 is stacked to the second stack 20 and pressed by an external force, the movable member 312 moves toward the center of the first stack 10. When the stacking piece is in place, the stacking piece is returned to be clamped with the clamping groove under the elastic action of the elastic piece 311.

Correspondingly, the movable member 312 can slide towards the direction close to the center of the first stacking member 10 under the action of external force, that is, the first bending clamping plate of the movable member 312 is released from the clamping groove by pressing inwards to unlock, so as to form an unlocked state.

Specifically, when the first stack 10 is stacked to the second stack 20 and is pressed by an external force, the movable member 312 slides in the Y direction toward a position near the center of the first stack 10; when stacked in place, the movable member 312 slides in the Y direction to a position away from the center of the first stack 10. When the first bending clamp plate is unlocked, the movable piece 312 slides to a position close to the center of the first stacking piece 10 along the Y direction under the pressing of an external force, so that the first clamping leg 3121 of the first bending clamp plate is separated from the clamping groove to separate the first stacking piece 10 from the second stacking piece 20, and when the first bending clamp plate is unlocked, the force application direction of the external force is parallel to the Y direction and faces the center of the first stacking piece 10.

Further, a stopper 3122 is provided on a side of the movable member 312 opposite to the bottom surface of the first stacking member 10, and the stopper 3122 is used to limit a distance that the movable member 312 moves in a direction approaching the second slot 112. The precision of the fit between the first pin 3121 and the clamping groove is ensured.

Referring to fig. 1 again, further, in the present embodiment, the bottom of the second stack 20 is further provided with a first mating structure 31 and a second mating structure 32 opposite to each other, and the top of the first stack 10 is further provided with a third mating structure 41 and a fourth mating structure 42 opposite to each other. In other words, additional stacks may be stacked on top of the first stack 10, and the second stack 20 may be stacked on top of other stacks.

It should be noted that the stacks located at the same layer may be referred to as the first stack 10 or the second stack 20. In other words, when one first stack 10 is stacked on top of two second stacks 20, the third and fourth mating structures 41 and 42 may be located on the two second stacks 20, respectively. In other words, one first stack 10 above may be secured by the third mating structure 41 on one of the second stacks 20 and the fourth mating structure 42 on the other second stack 20.

Referring to fig. 1 to 8 again, in one embodiment of the present utility model, the first stacking member 10 includes a first box 101 and a second box 102, and the first box 101 and the second box 102 can form a storage cavity 107 after being fastened to each other; the first stacking piece 10 further comprises a locking structure 103, one side of the first box body 101 is rotatably connected to one side of the second box body 102, and the other side of the first box body 101 is locked and buckled with the other side of the second box body 102 through the locking structure 103; when the first stack 10 is stacked to the second stack 20, the locking structure 103 is located relatively on the peripheral side of the second stack 20. The optional second stack 20 is identical in structure to the first stack 10.

Alternatively, the second stack 20 and the first stack 10 may be different in size. Thus, when the first stacking member 10 and the second stacking member 20 are stacked on each other, the locking structure 103 is located on the periphery of the stacking member, so that the opening and closing of the first stacking member 10 and the second stacking member 20 can not be affected under the condition that the first stacking member 10 and the second stacking member 20 are stacked on each other. That is, in the case where the first stack 10 is stacked on the second stack 20, the first casing 101 of the second stack 20 can be turned open with the first stack 10 locked on the first casing 101 with respect to the second casing 102; the first cassette 101 of the first stack 10 can also be opened and closed with respect to its own second cassette 102.

Further, in the present embodiment, two sets of second connection assemblies 40 are provided on the second stacking member 20, and two first stacking members 10 can be stacked and locked. The two first stacks 10 are arranged at intervals in the length direction (Y direction) of the second stack 20.

It will be appreciated that multiple sets of first connection assemblies 30 may be provided on each first stack 10 and multiple sets of second connection assemblies 40 may be provided on each second stack 20.

Referring to fig. 1 again and referring to fig. 10 and 11 together, in this application, a plurality of sets of second connection assemblies 40 may be disposed on top of the second stacking member 20, and a preset distance 104 is provided between two adjacent sets of second connection assemblies 40, where the preset distance 104 is used to enable the first boxes 101 of two adjacent first stacking members 10 to rotate and open relative to the second boxes 102.

Alternatively, the preset spacing 104 can enable the first cassette 101 of the first stack 10 to be turned open and closed by an angle greater than or equal to 90 ° with respect to the second cassette 102. In this way, the two first stacks 10 located at the same level can be prevented from interfering with each other when being opened at the same time, and the two stacks can be ensured to be opened and closed respectively or simultaneously. It will be appreciated that the preset spacing 104 may also enable the first casing 101 of the first stacking member 10 to rotate and open with respect to the second casing 102 by an angle less than 90 °, so long as the first casing 101 can be opened with respect to the second casing 102, so as to facilitate taking and placing objects from the storage cavity 107.

Further, the second stacking member 20 is provided with a through hole 105 to form a handle portion 106, and the handle portion 106 is located in a region of the second stacking member 20 where the preset interval 104 is located. With this arrangement, space can be saved, and the entire stacking system 100 can be easily handled by the handle 106 without affecting stacking of the first stacking member 10 and the second stacking member 20.

Further, optionally, the thickness of the handle 106 is smaller than the height of the second stacking unit 20, so as to ensure that when two stacking units with the same specification are stacked on each other, a gap is formed between two adjacent handle 106, so that a user can extend into and lift the entire stacking system 100 through one or more of the handle 106.

It is to be appreciated that the first stack 10 and/or the second stack 20 include, but are not limited to, a storage bin, a storage box, a storage basket, and the like. The shape of the first stack 10 and/or the second stack 20 is not limited, including but not limited to rectangular parallelepiped, cylindrical, columnar, etc. Preferably, in the present embodiment, the first stacking member 10 and the second stacking member 20 are rectangular storage boxes, which include, but are not limited to, storage boxes for maintenance tools.

It is understood that when the first stacking member 10 and the second stacking member 20 are stacked on each other, the length, width and height of the former and the length, width and height of the latter can be set according to the requirements, so long as a plurality of stacking members can be stacked on each other.

Preferably, the length and/or width of the stack located at the next is greater than or equal to the length and/or width of the stack located at the last.

More preferably, the length and width of the stack at the lowermost level in the stacking system 100 is no less than the length and width of the stack at the upper level.

It will be appreciated that the stacking system 100 may also be provided with an auxiliary structure 50 to further assist in limiting. The auxiliary structure 50 may include a first stopper and a second stopper, which cooperate to limit movement of the first and second stacks 10 and 20 in the X, Y, Z, XY, XZ or YZ direction.

For example, in one embodiment, the first and second stoppers are respectively a limit projection 51 and a limit groove 52, one of the limit projection 51 and the limit groove 52 is located at the bottom of the first stack 10, and the other is located at the top of the second stack 20; the engaging of the stopper protrusion and the stopper groove 52 with each other can restrict the movement of the first stacked member 10 relative to the second stacked member 20 in the X direction and the Y direction. It is understood that, when the above arrangement is adopted, the first clamping groove 4111 of the third mating structure 41 and/or the second clamping groove 421 of the fourth mating structure 42 can also be formed on the side wall of the limiting groove 52. In other words, as long as the third mating structure 41 and the fourth mating structure 42 each have a clamping groove for clamping the spacing first stacking member 10, the outer wall structure for forming the clamping groove can be flexibly arranged.

Referring to fig. 12 and 13, the present utility model also provides a second embodiment, which has the same concept and most of the structure as the first embodiment, except that:

in the second embodiment, the sliding direction of the movable member 312 is perpendicular to the side wall of the first stack 10, and when the first stack 10 is stacked to the second stack 20 and pressed by an external force, the movable member 312 moves away from the center of the first stack 10. Correspondingly, the movable member 312 can slide in a direction away from the center of the first stacking member 10 under the action of external force, that is, the first bending clamping plate of the movable member 312 is pulled outwards to unlock, so that the first bending clamping plate is separated from the clamping groove to form an unlock state.

It should be noted that, in the present embodiment, the notch of the clamping groove faces outwards, the notch of the clamping groove of the third matching structure 41 faces away from the notch of the clamping groove of the fourth matching structure 42, and the clamping direction of the first clamping leg 3121 of the first bending clamping plate is opposite to the clamping direction of the second clamping leg 3211 of the second bending clamping plate 321.

Specifically, when the first stack 10 is stacked to the second stack 20 and is pressed by an external force, the movable member 312 slides in the Y direction to a position away from the center of the first stack 10; when stacked in place, the movable member 312 slides in the Y direction toward a position near the center of the first stack 10. When the first bending clamp plate is unlocked, the movable piece 312 slides to a position far away from the center of the first stacking piece 10 along the Y direction under the pulling of an external force, so that the first clamping leg 3121 of the first bending clamp plate is separated from the clamping groove to separate the first stacking piece 10 from the second stacking piece 20, and when the first bending clamp plate is unlocked, the force application direction of the external force is parallel to the Y direction and faces to one side far away from the center of the first stacking piece 10.

To facilitate movement of the movable member 312, optionally, in this embodiment, the movable member 312 may slidably protrude beyond the side wall of the first stack 10; it will be appreciated that in other embodiments, the moveable member 312 may also be slid to a position that does not protrude from the side wall, so long as unlocking is enabled.

Further, in order to facilitate pulling the movable member 312 to move away from the center of the first stack 10, the movable member 312 is provided with a pulling portion for providing a force application position; the pulling portion may be a pull rope disposed on the movable member 312, or may be a protruding edge on the movable member 312, and it will be understood that the specific structure of the pulling portion may be set according to the requirement as long as the pulling portion can be conveniently pulled by a user to move by applying force.

Referring to fig. 14 to 16, the present utility model also provides a third embodiment, which has the same concept and most of the structure as the first embodiment, except that:

the sliding direction of the movable member 312 is parallel to the side wall of the first stack 10, and the movable member 312 moves along the side wall of the first stack 10 when the first stack 10 is stacked to the second stack 20 and pressed by an external force. Correspondingly, the movable piece 312 can slide along the Y direction under the action of external force, so that the first bending clamping plate of the movable piece 312 is separated from the clamping groove to form an unlocking state.

Specifically, in the present embodiment, when the first stacking member 10 is stacked to the second stacking member 20 and is pressed by an external force, the movable member 312 moves in the Y direction toward the side wall where the length direction of the first stacking member 10 is located; when stacked in place, the movable member 312 slides in the Y direction to a position away from the side wall where the length direction of the first stack 10 is located. When the first folding card is unlocked, the movable member 312 slides along the Y direction to a position close to the side wall of the first stacking member 10 along the length direction under the pushing of the external force, so that the first leg 3121 of the first folding card is separated from the clamping slot, and the first stacking member 10 and the second stacking member 20 are separated conveniently. It should be noted that, at the time of unlocking, the direction of application of the external force is parallel to the Y direction, perpendicular to the placement direction of the first stack 10.

It will be appreciated that, to facilitate the movement of the pushing movable member 312, the length of the second notch 112 of the mounting cavity 11 in the Y direction is greater than or equal to 2 times the length of the second leg 3211 of the second bending bracket 321 in the Y direction. To ensure that an unlocked state can be established.

Referring to fig. 17 and 18, the present utility model also provides a fourth embodiment, which has the same concept and most of the structure as the first embodiment, except that:

In this fourth embodiment, the movable member 312 is rotatably mounted to the first stack 10. In one embodiment of the present utility model, the movable member 312 includes a rotation plate 313 and a rotation shaft 314, the rotation plate 313 is rotatably mounted on the first stacking member 10 through the rotation shaft 314, and the rotation plate 313 includes a first movable arm 3131 and a second movable arm 3132 connected to each other; under the action of force, the first movable arm 3131 and the second movable arm 3132 can rotate in opposite directions with the rotation shaft 314 as a rotation fulcrum;

one side of the first movable arm 3131 is abutted to the first stacking piece 10, one side of the second movable arm 3132 is abutted to the elastic piece 311, a first bending clamping plate is arranged on one side, opposite to the side, away from the elastic piece 311, of the second movable arm 3132, the second matching structure 32 comprises a second bending clamping plate 321 arranged at the bottom of the first stacking piece 10, and the third matching structure 41 and the fourth matching structure 42 are respectively provided with clamping grooves; in the case that the second bending clamping plate 321 is clamped with the fourth matching structure 42 or the third matching structure 41, the first stacking piece 10 is pressed, and the first bending clamping plate can be clamped with the third matching structure 41 or the fourth matching structure 42.

Correspondingly, the first movable arm 3131 of the rotating plate 313 can drive the second movable arm 3132 to rotate to compress the elastic member 311 under the action of external force, that is, to press downward to rotate and unlock, so that the first bending clamping plate is separated from the clamping groove, and an unlock state is formed.

Specifically, when the first stack 10 is stacked to the second stack 20 and is pressed by an external force, the second movable arm 3132 of the rotation plate 313 rotates the compression elastic member 311 upward under the abutment of the third engagement structure 41 or the fourth engagement structure 42; when stacking in place, the movable piece 312 rotates downwards to reset under the action of the elastic piece 311 and is clamped in the clamping groove. At the time of unlocking, the first movable arm 3131 of the rotating plate 313 is pressed by an external force to rotate downward, so that the second movable arm 3132 rotates upward, the first leg 3121 of the first bending clamping plate is separated from the clamping groove, and the first stacking member 10 and the second stacking member 20 can be separated from each other.

Referring to fig. 19 to 21, the present utility model also provides a fifth embodiment, which has the same concept and most of the structure as the first embodiment, except that:

in the fifth embodiment, the second mating structure 32 includes a bump 322 disposed at the bottom of the first stack 10, and the fourth mating structure 42 includes a groove 422 disposed at the top of the second stack 20; the second engaging portion and the fourth engaging portion are engaged to be able to restrict the movement of the first stack 10 relative to the second stack 20 in the X direction and the Y direction; the first engagement structure 31 cooperates with the third engagement structure 41 to at least restrict movement of the first stack 10 relative to the second stack 20 in the Z-direction.

Note that the recess 422 is a sink. In other words, the recess 422 has a predetermined depth; in the locked state, that is, in the case that the first matching structure 31 and the third matching structure 41 are matched with each other, the protrusion 322 cannot be separated from the groove 422 or cannot be completely separated from the groove 422, so that the first matching structure 31 and the third matching structure 41 can be effectively limited in the Z direction.

Further, the groove 422 has only one notch, the plane of which is parallel to the top surface of the second stack 20, and the notch is oriented upward; in other words, the slot faces a side relatively far from the bottom of the second stack 20.

Further, it is understood that the number of the grooves 422 and the protrusions 322 can be plural, so long as the number and positions thereof are in one-to-one correspondence.

In the present embodiment, the first matching structure 31 includes a movable member 312 and an elastic member 311, the movable member 312 is movably mounted on the first stacking member 10, and the elastic member 311 is mounted on the first stacking member 10 and elastically acts on the movable member 312; when the first stacking member 10 is stacked to the second stacking member 20 and is pressed by an external force, the movable member 312 can move on the first stacking member 10, so that when the first stacking member 10 is stacked in place, the movable member 312 can return under the elastic action of the elastic member 311 and cooperate with the third cooperation structure 41 to form a locking state.

According to the stacking system 100 provided by the utility model, the first stacking piece 10 and the second stacking piece 20 can be stably connected at least in the Z direction through the first connecting component 30 and the second connecting component 40, so that good transportation stability can be kept after stacking, and the stacking system can not collapse easily under the condition of fully utilizing the storage space during storage, thereby effectively reducing potential safety hazards during storage.

The technical features of the above-described embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above-described embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.

The above examples illustrate only a few embodiments of the utility model, which are described in detail and are not to be construed as limiting the scope of the utility model. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the utility model, which are all within the scope of the utility model. Accordingly, the scope of protection of the present utility model is to be determined by the appended claims.

Claims (20)

1. A stacking system, comprising a first stack (10), a second stack (20), a first connection assembly (30) and a second connection assembly (40), wherein the first connection assembly (30) is arranged on the first stack (10), and the second connection assembly (40) is arranged on the second stack (20); the first connecting assembly (30) cooperates with the second connecting assembly (40) to connect the first stack (10) and the second stack (20) and to restrict movement of the first stack (10) relative to the second stack (20) at least in the Z-direction.

2. The stacking system of claim 1, wherein the first connection assembly (30) comprises oppositely disposed first (31) and second (32) mating structures, the second connection assembly (40) comprises oppositely disposed third (41) and fourth (42) mating structures, the first (31) and second (32) mating structures being located at the bottom of the first stack (10); -said third mating structure (41) and said fourth mating structure (42) are located on top of the same second stack (20) or on top of two second stacks (20), respectively;

The stacking system (100) has a locked state in which one of the first mating structure (31) and the second mating structure (32) is capable of mating with the third mating structure (41) and the other is capable of mating with the fourth mating structure (42).

3. The stacking system of claim 2, wherein the first mating structure (31) comprises a movable member (312) and an elastic member (311), the movable member (312) being movably mounted to the first stack (10), the elastic member (311) being mounted to the first stack (10) and acting elastically on the movable member (312);

when the first stacking piece (10) is stacked to the second stacking piece (20) and is pressed by external force, the movable piece (312) can move on the first stacking piece (10), so that when the first stacking piece (10) is stacked in place, the movable piece (312) can return under the elastic action of the elastic piece (311) to be matched with the third matching structure (41) or the fourth matching structure (42) to form the locking state.

4. A stacking system according to claim 3, wherein a side of the movable member (312) opposite from the top of the first stack (10) is provided with a first bending clamping plate, the second mating structure (32) comprises a second bending clamping plate (321) arranged at the bottom of the first stack (10), and the third mating structure (41) and the fourth mating structure (42) each have a clamping groove; under the condition that the second bending clamping plate (321) is clamped with the fourth matching structure (42) or the third matching structure (41), the first bending clamping plate can be clamped with the third matching structure (41) or the fourth matching structure (42).

5. The stacking system of claim 4, wherein the clamping groove of the third matching structure (41) and the clamping groove of the fourth matching structure (42) are provided with a notch, and the notches of the two are opposite; when the first matching structure (31) and the second matching structure (32) are mutually clamped with the third matching structure (41) and the fourth matching structure (42), the relative movement of the first stacking piece (10) and the second stacking piece (20) in the directions X, Y, Z is limited.

6. The stacking system according to claim 4, wherein a side of the first bending clamping plate relatively far from the top of the first stacking piece (10) is provided with a first guiding inclined plane (301), a side of the third matching structure (41) and the fourth matching structure (42) relatively far from the top of the second stacking piece (20) is provided with a second guiding inclined plane (401) which is in inclination matching with the first guiding inclined plane (301), and when the first stacking piece (10) is stacked to the second stacking piece (20), the clamping foot of the first bending clamping plate can be clamped into the clamping groove of the third matching structure (41) or the clamping groove of the fourth matching structure (42) under the matching of the first guiding inclined plane (301) and the second guiding inclined plane (401).

7. A stacking system according to claim 3, wherein the moveable member (312) is slidably mounted to the first stack (10).

8. The stacking system of claim 7, wherein the sliding direction of the movable member (312) is perpendicular to the side wall of the first stack (10), and the movable member (312) moves toward the center near the first stack (10) when the first stack (10) is stacked to the second stack (20) and pressed by an external force.

9. The stacking system of claim 7, wherein the sliding direction of the movable member (312) is perpendicular to the side wall of the first stack (10), and the movable member (312) moves away from the center of the first stack (10) when the first stack (10) is stacked to the second stack (20) and pressed by an external force.

10. The stacking system of claim 7, wherein the sliding direction of the movable member (312) is parallel to the side wall of the first stack (10), and the movable member (312) moves along the side wall of the first stack (10) when the first stack (10) is stacked to the second stack (20) and pressed by an external force.

11. A stacking system according to claim 3, wherein the moveable member (312) is rotatably mounted to the first stack (10).

12. The stacking system of claim 11, wherein the movable member (312) comprises a rotating plate (313) and a rotating shaft (314), the rotating plate (313) being rotatably mounted to the first stack (10) by the rotating shaft (314), the rotating plate (313) comprising a first movable arm (3131) and a second movable arm (3132) connected to each other; under the action of force, the first movable arm (3131) and the second movable arm (3132) can rotate in opposite directions by taking the rotating shaft (314) as a rotating pivot;

one side of the first movable arm (3131) is abutted to the first stacking piece (10), one side of the second movable arm (3132) is abutted to the elastic piece (311), a first bending clamping plate is arranged on one side, opposite to the elastic piece (311), of the second movable arm (3132), the second matching structure (32) comprises a second bending clamping plate (321) arranged at the bottom of the first stacking piece (10), and the third matching structure (41) and the fourth matching structure (42) are respectively provided with clamping grooves; the first stacking piece (10) is pressed under the condition that the second bending clamping plate (321) is clamped with the fourth matching structure (42) or the third matching structure (41), and the first bending clamping plate can be clamped with the third matching structure (41) or the fourth matching structure (42).

13. The stacking system of claim 2, wherein the second mating structure (32) comprises a bump (322) disposed at the bottom of the first stack (10), and the fourth mating structure (42) comprises a groove (422) open at the top of the second stack (20); -the second engagement structure (32) being engageable with the fourth engagement structure (42) to limit movement of the first stack (10) relative to the second stack (20) in X-direction and Y-direction; the first engagement structure (31) is engageable with the third engagement structure (41) to at least limit movement of the first stack (10) relative to the second stack (20) in the Z-direction.

14. The stacking system of claim 13, wherein the first mating structure (31) comprises a movable member (312) and an elastic member (311), the movable member (312) being movably mounted to the first stack (10), the elastic member (311) being mounted to the first stack (10) and acting elastically on the movable member (312);

when the first stacking piece (10) is stacked to the second stacking piece (20) and is pressed by external force, the movable piece (312) can move on the first stacking piece (10), so that when the first stacking piece (10) is stacked in place, the movable piece (312) can return under the elastic action of the elastic piece (311) and is matched with the third matching structure (41) to form the locking state.

15. The stacking system of claim 3 or 14, wherein the stacking system (100) further comprises an unlocked state in which the moveable member (312) is able to disengage from the third mating structure (41) or the fourth mating structure (42) under the influence of an external force to enable the first stack (10) to be disengaged from the second stack (20).

16. Stacking system according to claim 2, wherein the bottom of the second stack (20) is further provided with the first mating structure (31) and the second mating structure (32) opposite, and the top of the first stack (10) is further provided with the third mating structure (41) and the fourth mating structure (42) opposite.

17. The stacking system of claim 1, wherein the first stack (10) comprises a first box (101) and a second box (102), and the first box (101) and the second box (102) can form a storage cavity (107) after being buckled with each other; the first stacking piece (10) further comprises a locking structure (103), one side of the first box body (101) is rotatably connected to one side of the second box body (102), and the other side of the first box body (101) is locked and buckled with the other side of the second box body (102) through the locking structure (103); the locking structure (103) is located relatively to the circumferential side of the second stack (20) when the first stack (10) is stacked to the second stack (20).

18. Stacking system according to claim 17, wherein a plurality of groups of second connection assemblies (40) are arranged on top of the second stack (20), and a preset distance (104) is arranged between two adjacent groups of second connection assemblies (40), wherein the preset distance (104) is used for enabling the first box bodies (101) of two adjacent first stacks (10) to be turned open and closed relative to the second box bodies (102).

19. The stacking system of claim 18, wherein the preset spacing (104) enables the first cassette (101) of the first stack (10) to be turned open and closed by an angle greater than or equal to 90 ° relative to the second cassette (102).

20. The stacking system of claim 18, wherein the second stack (20) is provided with through holes (105) to form a handle portion (106), the handle portion (106) being located in a region of the second stack (20) where the predetermined distance (104) is provided.