Abstract:
A module for use in stacking plate panels, having: a supporting portion a load transmitting portion, connected to the outside of a supporting portion and a portion for positioning the plate panels horizontally, wherein the load transmitting portion includes receiving surfaces formed on the upper and lower portions of the module, and when the releasing surface of one module is mounted on the receiving surface of a second module, upon stacking the upper module on the lower module, the positioning portion has an upper engaging portion attached to an edge of the receiving surface, and limits a relative movement of the upper module to the lower module, and a lower engaging portion attached to the edge on the same side as the releasing surface on which the upper engaging portion is formed to offset the upper engaging portion, and limits a relative movement of the upper and lower modules.

Description:
RELATED APPLICATIONS 
     This application claims priority from Japanese Application Number JP2010-289011, filed on Dec. 25, 2010, the content of which is hereby incorporated by reference into this application. 
     FIELD OF THE INVENTION 
     The present invention relates to a module for stacking the thin plate panel and a method of stacking the thin plate panel. More specifically, it relates to the method for stacking the thin plate panel using the module where various thin plate panels can be stacked vertically with efficiency and stability. 
     BACKGROUND OF THE INVENTION 
     Modules are used for transporting easily breakable heavy thin plate panel i.e. solar panels stored vertically in contact less stacked up form. 
     Known modules, such as those described in Japanese Open Publication No. 2006-32978 and Open publication no. 55-7790, possess a thin plate panel connected with the support side used for supporting it from lower side and in the state where it is extended from support side. It also possesses the molded material that vertically transmits the weight of thin plate panel. This module also possesses the concave part which mutually gets stuck to top and bottom part of molded material. 
     According to such modules, the supported thin plate panel can be vertically stacked up without contact. The thin plate panel is put on each support side. Next, in each corner, it is set in the upper concave part of the molded material of the module where the lower concave part of the molded material of a new module has already been arranged. 
     However, such known modules contain the following technical problems. 
     First, the uneven positioning part is installed on the top and the bottom of the molded load transmission material to transmit the weight of the thin plate panel up and down. It is difficult to secure a load transmission area large enough for the top and bottom part. Therefore, according to the module, it is possible to support the thin plate panel, in spite of stacking the thin plate panel up and down when pillar shaped module is unstable due to the insufficient load transmission area, and the pillar may collapse by the vibrations while transporting it and the stacked thin plate panel may get damaged. 
     Secondarily, it is difficult to vertically stack up the multiple thin plate panels with efficiency and stability. 
     To transport the stacked thin plate panels by the forklift, when the thin plate panels are stacked by using the module on a palette, the thin plate panel cannot be stacked if the module is not positioned at the position that corresponds to each four corners of the thin plate panel on the palette. More concretely, each thin plate panel is put on the support side of the module in each of the four corners. The thin plate panel cannot be supported if the support side of the module is not arranged on each corner by using the state supported from the lower side. At this point, the module is allotted to each four corners of two or more thin plate panels. It is difficult to stack the thin plate panel in the state where the module is allotted to four corners on the palette. Especially, since the module is not fixed to each corner part of the thin plate panel. When four modules like thin plate panels are stacked up at the same time as against the modules that have already been stacked to the pillar-shape on the palette in each corner, the stability of pillar shape module is damaged, and it also destroys the pillar shape module. 
     Thirdly, making the module compact is a difficult point in relation to the first point. 
     In detail, especially, from the viewpoint where enough strength is secured to support the total weight of the stacked thin plate panel of the module of lowest level, the load transmission area is decreased by setting uneven part in load transmission area and if the load transmission part is enlarged to increase the load transmission area, though the projection of the module to horizontal direction inevitably grows it is difficult from the viewpoint of maximum storage in limited storage space, without concerning the request of compact module. On the other hand, for a compact module, there is no uneven part in load transmission part and the prevention of a decrease in the load transmission area can be achieved i.e. a vertical board is installed in each top and bottom part of the module. When the module is stacked up, the relative displacement to one direction of inner side or outer side of the module under the upper module can be restricted by locking the lower vertical board of upper module with upper vertical board of lower module. 
     However, the relative displacement to two directions of inner side and outer side of the module under the upper module cannot be restricted. When the stability of the pillar shaped module is damaged, the pillar shaped module gets destroyed. 
     SUMMARY OF THE INVENTION 
     It is an object of the present invention to offer a module used for stacking up the thin plate panel where multiple thin plate panels can be vertically stacked up with stability. 
     It is another object of the present invention to offer a method of stacking up the thin plate panel where stacking up of multiple thin plate panels can be done vertically efficiently and with stability. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         FIG. 1  illustrates total perspective view of upper side of module  10  used to stack solar panel P that lies in the first embodiment of this invention chart. 
         FIG. 2  illustrates total perspective view of lower side of module  10  used to stack solar panel P that lies in the first embodiment of this invention chart. 
         FIG. 3  illustrates total perspective view from outer side of module  10  used to stack solar panel P that lies in the first embodiment of this invention chart. 
         FIG. 4  illustrates ground plan of module  10  used to stack solar panel P that lies in the first embodiment of this invention chart. 
         FIG. 5  illustrates bottom view of module  10  used to stack solar panel P that lies in the first embodiment of this invention chart. 
         FIG. 6  illustrates Figurematic illustration that shows the function of a lower engaging portion of module  10  used to stack solar panel P that lies in the first embodiment of this invention. 
         FIG. 7  illustrates partial outline Figure showing the state of stacked module  10  used to stack solar panel P that lies in the first embodiment of this invention. 
         FIG. 8  illustrates total perspective view showing completed stacked solar panel P on palette by using module  10  used to stack solar panel P that lies in the first embodiment of this invention. 
         FIG. 9  is figure similar to  FIG. 1  of module  10  used to stack solar panel P that lies in the second embodiment of this invention. 
     
    
    
     DETAILED DESCRIPTION 
     According to one embodiment of the invention, the module used to stack up the thin plate panel of invention is used for the stacking of the product of the thin plate panel. To solve the problem, the support part for supporting thin plate panel from lower side and the support part outside the support part are connected. It has the load transmission part where the weight of the thin plate panel supported by the support part is vertically transmitted and also it has the positioning portion where thin plate panel is in horizontal direction. 
     The load transmission part has the load releasing side installed in lower part of this module and also it has the load receiving side installed in the upper part of the module. 
     When upper module is stacked up on lower module in the state where the load releasing side of upper module is put on the load receiving side of lower module, the positioning portion has the upper engaging portion that limits the relative displacement of the module under the upper module installed on the outer edge and inner edge of the load receiving side and the lower engaging portion that limits relative displacement of the module under upper module installed with the upper engaging portion horizontally offset on the same side of edge where upper engaging portion of the load releasing side is installed. 
     According, when the upper thin plate panel is stacked on a lower thin plate panel in the state where a load receiving side of the lower module supports a load releasing side of the upper module, as for upper engaging portion installed on inner edge or the outer edge of load receiving side of lower module and lower engaging portion installed on the same side where upper engaging portion on load releasing side of upper module is installed, the upper module can be smoothly put on lower module without knocking against each other since the position is relatively horizontally moved and the offset arrangement is done. 
     The thin plate panel can be vertically stacked efficiently and stably, without installing the lower engaging portion and the upper engaging portion that composes positioning portion on load releasing side and the load receiving side composing the load transmission part. By separating the load transmission part and the positioning portion, the load transmission is done between upper and lower modules with the load transmission area secured to its maximum. The relative displacement to outer side or inner side of the module under upper module is restricted by upper engaging portion and at the same time relative displacement to outer side or inner side of the module under upper module is restricted by lower engaging portion. Generally, the upper module is horizontally positioned on inner side and outer side of the lower module. 
     The support part forms a roughly U-shaped cross section by an upper plate and a lower plate and it has a vertical plate where the upper plate and lower plate are connected. The thin plate panel is inserted from open part between the upper plate and the lower plate and it is supported. The load transmission part has the load transfer area formed on the vertical plate. The load receiving side is installed on the upper part of the vertical wall. The load releasing side should be installed under the vertical wall. 
     Moreover, the upper plate is installed immediately below the bottom of the upper engaging portion. The lower plate is installed immediately above the top of the last engaging portion. The thin plate panel is a panel without the frame in the periphery, and the module supports to each four corners of the panel and it should be directly inserted and supported. 
     Moreover, the support part is a plate-like body that composes the support side in the upper surface. The thin plate panel is a panel with the frame on the edge and each four corners of the panel should be put on support side through frame in the form that touches inner side of the vertical wall. 
     In addition, again the upper engaging portion and the lower engaging portion are installed on the outer edge of the load receiving side and the load releasing side respectively. The upper engaging portion limits the relative movement of the upper module towards outside direction of lower module. The last engaging portion should limit the relative movement of upper module towards the inside direction of lower module. 
     Additionally, the load releasing side should be formed under the vertical wall, on the other hand the load receiving side should be formed on the vertical wall, and the vertical wall should be solid structure. Moreover, the width of the load receiving side and the load releasing side should be 7 mm or less. 
     The engaging portion has the inclination part that inclines in the state separated to inner side from inner edge of the load receiving side in upward direction from load receiving side. 
     The engaging portion comprises the inclination part that inclines in the form separated in inner side from inner edge of the load receiving side in downward direction from the load receiving side. 
     Moreover, the angle of inclination of the perpendicular line of the slope should be ten degrees or thirty degrees. The upper engaging portion and the lower engaging portion should be installed so that it almost covers inner edge or outer edge of the vertical wall. 
     In addition, the horizontal cross section of the vertical wall should not be L character shape. The upper engaging portion is installed on each side of the intersection part in the L shape load receiving side one by one, and the last engaging portion should be installed on each side of the intersection part on the L shape load releasing side one by one. 
     Moreover, the upper engaging portion installed on the proximal side in the intersection part in the L shape load receiving side respectively should place the intersection part and be formed continuously. 
     Additionally, the upper engaging portion is installed on the proximal side of the intersection part in the L shape load receiving side, and the lower engaging portion should be installed on the distal side of the intersection part on the L shape load releasing side. 
     Moreover, the upper engaging portion and the lower engaging portion should be mutually arranged on each side of the intersection part in the L shape load receiving side. 
     In addition, the thin plate panel should be a rectangular solar panel. 
     Moreover, the module is made of the resin, and it would be better to be molded as one mold. 
     One embodiment of the present invention provides a method of stacking up the thin plate panels with a system configured in accord with an embodiment of this invention, the system comprising a load transfer area in the upper part and lower part. The corner part of the thin plate panel is supported from the lower side and it is connected with the support part. The weight of the thin plate panel is vertically transmitted by the load transmission part and the positioning portion in which the thin plate panel is positioned horizontally by using the engaging portion installed on the edge of the load transfer area. Each two or more thin plate panels have, in each corner, a stage where the thin plate panel is stacked one by one such that vertically stacks of the pillar shaped module vertically transmit the weight of the thin plate panel through the load transmission part. In each corner, the composition of the accumulation stage has the stage where the upper thin plate panel is horizontally positioned on lower thin plate panel through the limitation of a horizontal relative movement of upper module to lower module by the engaging portion between modules that are vertically adjacent. 
     The support part forms the U-shaped cross section by the lower plate and the upper plate. It should have vertical wall that connects the outer edge of the upper plate and the outer edge of the lower plate. It goes side by side with two or more thin plate panels of the accumulation schedule in front of the accumulation stage. It also has the stage where the module is allotted to each four corners. In this allotment stage, the thin plate part from U-shaped cross section is inserted between the lower plate and the above mentioned upper plate and it also has the stage of insertion and supporting. The stacking stage should have the stage of stacking the thin plate panels one by one where module is stacked up in pillar shape vertically and the weight of thin plate panel through the load transmission part is transmitted vertically in each corner of multiple thin plate panels where four corner modules are allotted. 
     In addition, the load transfer area has the load releasing side installed in lower part of load receiving side and the vertical wall installed in the upper part of the vertical wall. The engaging portion has the lower engaging portion that limits relative displacement of module of upper module installed where upper engaging portion is horizontally installed offset on the edge of same side towards lower module where upper engaging portion on the load releasing side are installed and also engaging portion that limits the relative displacement of upper module installed in outer edge or inner edge of load receiving side towards lower module. In each corner part, the load releasing side of the upper module is put on the load receiving side of a lower module. 
     In the positioning stage, the lower engaging portion of upper module should be locked on inner edge of the load receiving side of lower module and also the lower engaging portion of lower module should be locked on outer edge or inner edge of the load releasing side of upper module. 
     The lower engaging portion has an inclination part that inclines away from the inner edge of the load releasing side downwards from the load releasing side and also the lower engaging portion has an inclination part that inclines away from inner direction from above mentioned inner side of the load receiving side towards upward direction from the load receiving side. The stacking stage should have the stacking stage of upper module on lower module by using the inclination part in the upper engaging portion and the last engaging portion as a guide side. 
     According to the first embodiment of module  10  of this invention, rectangular solar panel P is a stacked thin plate panel as explained below in detail with reference to the drawings. 
     Solar panel P connects the cell in the series. It is not thin plate and protected with a resin, tempered glass, or a metallic frame. More concretely, it is a thin plate structure where the cell that consist silicon between a glass layer, a plastic layer or the glass layer. Sunlight panel P has the area of several square meters, the thickness of several mm, and weight of 10 or 30 Kg and it has easily breakable structure. 
     In this embodiment, the four corners of sunlight panel P where the frame is not installed in rim are directly supported by module  10  used for stacking of the thin plate panel. 
     Module  10  contains inserted support part that supports solar panel P, the load transmission part where the weight of the thin plate panel connected with the support part from outside and supported by vertically transmitted support part is and the positioning portion which positions in the horizontal direction of solar panel P. 
     Referring to  FIG. 1  or  FIG. 5 , module  10  has the line-symmetric shape for centerline X-X (Refer to  FIG. 4 ). The inserted support part has vertical direction wall  18  that connects upper plate  12 , and lower plate  14  and a pair of plate  16  that consists of upper plate  12  and lower palate  14  vertically connected in parallel at intervals. Vertical direction wall  18  composes the load transmission part and module  10  is made up of the resin. This is integral molding. Module  10  is allotted to each of the four corners of solar panel P as explained back in detail, and the following module  10  is put on each module  10  by inserting and supporting panel P. By supporting additional solar panels P, solar panels P are vertically stacked by repeating this. 
     The weight of each solar panel P is transmitted in each corner through module  10  stacked to the pillar-shaped. The weight of multiple stacked up solar panels P is loaded in lowest module  10 . 
     The resin material of module  10  is a thermoplastic resin. It is Polyolefin (for instance, polypropylene and high-density polyethylene) which are copolymers homopolymer of olefin such as the ethylene, the propylene, the butane, Pentane isoprene, and Methyl pentene of non-amorphous resins etc. such as polyethylene and polypropylenes. Since the structure of module  10  is comparatively complex, it is especially suitable for an integral molding with the injection molding. 
     Respectively, upper plate  12  and lower plate  14  that composes a pair of plates  16  which will be having an L shape. By upper plate  12  and lower plate  14 , especially, as plainly shown in  FIG. 1 , lower direction walls  18  are installed so that outer edge  31  of upper plate is connected with outer edge  33  of lower plate  14  so that the vertical profiling may form roughly U-shaped section. 
     Upper plate  12  is fixed on inner side  111  of vertical wall  18  and immediately below lower side of upper engaging portion  104  explained afterwards, and lower plate  14  is fixed on inner side  111  of vertical wall  18  immediately above the upper side of lower engaging portion  106  explained afterwards. It is desirable that upper plate  12  and lower plate  14  are molded by integrated injection molding as a module. 
     As a result, a pair of plate  16  composes insertion support part that inserts and supports solar panel P and solar panel from open part is inserted between upper plate  12  and lower plate  14 . 
     In this case, by supporting direct trapping solar panel P without a frame in rim, the interval between upper plate  12  and lower plate  14  necessary for jamming support can be reduced as compared with systems using frames. By shortening the upper projection length of lower engaging portion  106  and lower projection length of upper engaging portion  104  as much as possible, the height of module  10  can be lowered. In limited storage space, especially the solar panel P without frame should be kept in the storage space where height is limited. The number of solar panels P can be kept secured. 
     Each intersection part  108  of upper plate  12  and lower plate  14  is orthogonal. When a solar panel P is trapped and supported, the upper side, lower side and side part of solar panel P are fixed and supported with stability by inner side  111  of vertical wall  18  and upper side of upper plate  12  and lower plate  14  by pushing the corner part of sunlight panel P towards inner side  111  of vertical wall  18  until the side piece of corner part of solar panel P touches inner side  111  of vertical wall  18 . 
     Therefore, the interval between the lower side of upper plate  12  and the upper surface of lower plate  14  and an area of upper plate  12  and lower plate  14  respectively should support panel P. By supporting trapped solar panel P from module  10 , and by fixing module  10  with solar panel P, solar panel P can be moved with module  10  allotted to the four corners of sunlight panel P as explained earlier. 
     Reinforcement ribs  41  and  43  are installed in upper plate  12  and lower plate  14  respectively as shown in  FIG. 1  and  FIG. 2 . Especially, when trapped solar panel P is supported, the weight of sunlight panel P is loaded on lower plate  14  and lower plate  14  is supported from the lower side. 
     As shown in  FIG. 1 , multiple reinforcement ribs  41  are installed at suitable intervals which are connected in the form where inner side  111  of vertical wall  18  and outer side  111  of upper plate  12  are straddled on upper side of upper plate  12 . On the other hand, multiple reinforcement ribs  43  are installed at suitable interval where inner side  111  of vertical wall and lower side of lower plate  14  are straddled on lower side of lower plate  14  as shown in  FIG. 2 . Number of installations of reinforcement ribs  41  and  43  and the interval should be provided according to the weight of solar panel P of stacking object. 
     Moreover, as shown in  FIG. 2 , Guide part  45  with taper is installed at suitable intervals in lower side of upper plate  12  so that it may incline from the viewpoint that facilitates supporting trapped solar panel P so that it inclines in downward direction towards inner side  111  of vertical wall  18 . An integrated molding including reinforcement ribs  41  and  43  and guide parts  45  is desirable. 
     Upper plate  12  and lower plate  14  that are not in L shape can be allotted to the middle part in the each vicinity of solar panel P, and after allotting it to the four corners of solar panel P by using module  10  of L shape, it can be allotted to the middle part by using rectangular module  10 . In addition, you may use a part of middle part together with a part of four corners. 
     Upper and lower sides  37  and  39  of vertical wall  18  compose the load transmission part as shown in  FIG. 1  and  FIG. 2 . 
     Upper surface  37  and lower side  39  of vertical wall  18  are mutually parallel, and when solar panels P are stacked, lower side  39  forms load releasing side  72  below module  10  while upper surface  37  forms load receiving side  74  above module  10 . 
     Load receiving side  74  and load releasing side  72  both compose the planar section of L shape that reaches from one side of end face  94  of vertical wall  18  to the other end face  95  of other side of vertical direction wall  18 . Since an uneven part where the positioning portion is composed is not set on the plane part, the load transmission area can be secured. As a result, making width W of load receiving respect  74  and load releasing side  72  thinner. 
     In detail, when solar panel P is stacked up, it is desirable to set the thickness below 115 mm or preferably 10 Mm or less since vertical direction wall  18  composes the load transmission part, from the viewpoint to make the thickness thinner as much as possible and enduring the weight of sunlight panel P. Vertical wall  18  is a solid structure. As a result, compacting of the module  10  is then achieved. When the storage space where the solar panel P stacked by module  10  is limited, the number of solar panels P that can be stored can be increased. 
     Next, as shown in  FIG. 1  and  FIG. 2 , when upper module  10  is stacked on lower module  10  where load releasing side  72  of upper module  10  is put on load receiving side  74  of lower module  10 , the positioning portion contains upper engaging portion  104  that limits the relative movement of the upper module  10  to the lower module  10  installed on inner edge of load receiving side  102  and last engaging portion  106  that limits the relative movement of the upper module  10  to the lower module  10  installed on inner edge  103  of same side where upper engaging portion  104  of load releasing side  72  is installed where it is installed offset in horizontal direction to upper engaging portion  104 . 
     Each upper engaging portion  104  is installed on each side of intersection part  108  of L shape load receiving side  74 , each one tower engaging portion  106  is installed on each side of intersection part  108  of shape load releasing side  72 , and upper engaging portion  104  and lower engaging portion  106  is installed so that it covers inner side  102 ,  103  of the vertical wall  18  by mutual cooperation. The upper engaging portion  104  is installed on the proximal side of intersection part  108  of L shape load receiving side  74 , and lower engaging portion  106  is installed on the distal side of intersection part  108  of L shape load releasing side  72 . 
     Upper engaging portion  104  has inclination part  110  that inclines away from inner direction from inner edge  102  of the load receiving side  74  towards upper direction from load receiving side  74  and it is fixed on inner side  111  of vertical wall  18 . When module  10  is stacked as explained back, height H from the load receiving side  74  of the upper engaging portion  104  to the upper side should be properly set so that inner side of lower plate  14  of upper module  10  does not collide, since end part of upper engaging portion  104  of lower module  10  reaches on the way of inner side  111  of vertical wall  18  of upper module  10  (refer to  FIG. 6 ) between vertically adjacent module  10 . 
     Alternatively, lower engaging portion  106  has inclination part  113  that inclines away from inner direction from inner edge  103  of the load releasing side  72  towards lower direction from load releasing side  72  and it is fixed on inner side  111  of vertical wall  18 . When module  10  is stacked, height H from the load releasing side  72  of the lower engaging portion  106  to the lower side should be properly set so that upper side of upper plate  12  of lower module  10  does not collide, since end part of lower engaging portion  106  of upper module  10  reaches on the way of inner side  111  of vertical wall  18  of lower module  10  (refer to  FIG. 6 ) between vertically adjacent module  10 . 
     The upper engaging portion  104  and lower engaging portion  106  both have the hollow construction from the viewpoint of light weighted. It is composed of first lateral part opposing almost parallel to vertical wall  18  and each edge of first lateral part and second lateral part and third lateral part extended between inner side  111  of vertical wall  18  and the bottom part where the opening composed by lower edge of the first lateral part, the second lateral part, and third lateral part is closed. In second lateral part and third lateral part, the slope diagonally extended from inner edge is installed and this composes the inclination part. The area of the inclination part can be secured without considering lightening as concrete structure. 
     When two or more solar panels P are stacked up by using such module  10  as explained back, each four corners of each solar panel P is supported by module  10  beforehand concurrently so that it may become easy to stack for instance by using each solar panel P that allots module  10  to each four corners on the palette. The angle of inclination part  110 ,  113  (α in  FIG. 1 ) should be properly decided in the range of 0˜90 degrees (does not include 0 degrees and 90 degrees) with reference to the height H and it should be 20˜70 degrees and further 30˜45 degrees. The horizontal positioning function of lower module  10  of upper module  10  decreases though it becomes easy to stack when the angle is larger than 70 degrees. On the other hand, when it is less than 20 degrees, the accumulation becomes difficult though a horizontal positioning function improves. 
     As a result, as shown in  FIG. 6 , upper engaging portion  104  of lower module  10  limits the relative movement of upper module  10  to inner side of lower module  10  between modules  10  that are vertically adjacent. The relative movement of upper module  10  to inner side and outer side of lower module  10  is controlled since lower engaging portion  106  of upper module  10  limits the relative movement of upper module  10  to outer side of lower module. Thus module  10  can be stacked with stability. 
     Especially, both upper plate  12  and lower plate  14  are formed to L shape as mentioned above. In each side where intersection part  108  is inserted, upper engaging portion  104  is set on upper plate  12  and lower engaging portion  106  is set on lower plate  14 . An orthogonal restriction of two directions on a horizontal plane is possible. More concretely, there is restriction to inner side of orthogonal two directions of lower module  10  of upper module  10 . On the other hand, it is restricted outside orthogonal two directions of lower module  10  of upper module  10 . 
     It is desirable to form the upper engaging portion  104  and lower engaging portion  106  by integrated molding especially the injection molding respectively as module  10 . In this case, dent  130  has been installed from the viewpoint of the closing prevention at the time of molding on the outer surface of module  10  as shown in  FIG. 3 . 
     According to the composition, upper engaging portion  104  and lower engaging portion  106  are installed on inner side  102  of load receiving side  74  and inner edge  103  of toad releasing side  72  respectively. Compacting of module  10  can be maintained without setting upper and lower engaging portion  106  on toad releasing side  72  and load receiving side  74  having load transfer area and without creating the projection outside module  10 . 
     As the transformation of positioning portion, upper engaging portion  104  installed on proximal side in intersection part  108  in L letterform load receiving side  74  can be formed by continuous insertion of intersection part  108 . 
     More than two upper engaging portion  104  and lower engaging portion  106  is set on each side of intersection pan  108  of L shape load receiving side  74 . Upper engaging portion  104  and lower engaging portion  106  can be mutually arranged. 
     In addition, when compacting of module  10  is not necessary, the upper engaging portion  104  and lower engaging portion  106  are installed on the outer edge of load receiving side  74  and load releasing side  72  respectively. Upper engaging portion  104  of lower module  10  limits the relative movement of upper module  10  to the outer side of lower module  10 . Lower engaging portion  106  of upper module  10  limits the relative movement of upper module  10  to inner side of lower module  10 . 
     The application of the module with above composition is explained below through the explanation of vertical stacking method of solar panel P using module  10 . 
     Two or more sunlight panels P are vertically stacked and solar panel P is vertically stacked on upper surface of palette for transporting it by forklift. It is explained with an example. 
     First of all, module  10  is concurrently allotted respectively in each four corners for two or more sunlight panels P of the stacking schedule. In detail, solar panel P is inserted from the open part of module  10  between lower plate  14  and upper plate  12 . Module  10  is fixed to solar panel P by inserting solar panel P. 
     Corner part of solar panel P moves toward inner side  111  of vertical wall  18 , by pushing the corner part of solar panel P towards inner side  111  of vertical wall  18  until it connects where lateral part of angle part of solar panel P is stuck to inner side  111  corresponding to vertical wall  18 , lateral part, lower side and upper part of corner part of solar panel P is fixed, supported with stability by inner side  111  corresponding to vertical wall  18  and upper side of lower plate  14  and lower side of upper plate  12 . 
     Such a process is concurrently carried out for each solar panel P. In the palette, efficient solar panel P can be stacked by omitting the process of allotting module  10  to the four corners of solar panel P and by preparing solar panel P in the state where module  10  is allotted to four corners. 
     Next, two or more sunlight panels P of two or more sunlight panels P that allot module  10  to four corners are stacked one by one in the form that stacks module  10  to the pillar-shaped in each corner. 
     Load releasing side  72  of L shape of the following module  10  is stacked and new solar panel P is stacked from the upper side to load receiving respect  74  of L shape of module  10  in the uppermost part on the palette in each corner. In that case, inclination part  113  of lower engaging portion  106  of load releasing side  72  of the following module  10  and inclination part  110  of upper engaging portion  104  of load receiving side  74  of module  10  in the uppermost part accomplishes the guide function. The stacking work of the following module  10  can be easily carried out. 
     Though lower engaging portion  106  of load releasing side  72  of following module  10  and upper engaging portion of load receiving side  74  of module  10  of lowest part is set on inner edge  102 ,  103  side, since the offset arrangement is mutually done, the following module  10  can be put on module  10  in the uppermost part without striking and without causing the outside projection of module  10  along with set up of the above lower engaging portion  104 , 106 . 
     When you stack sunlight panel P to sunlight panel P of the uppermost part, four modules  10  allotted to each four corners of sunlight panel P though module  10  in the corresponding uppermost part will be positioned at the same time. Such work can be done more easily by setting the angle of inclination α of inclination part  110  of upper engaging portion  104  and inclination part  113  of lower engaging portion  106  properly. 
     As shown in  FIG. 7 , by repeating the work, two or more solar panels P can be vertically stacked by stacking multiple module  10  in each four corners of multiple solar panel P. At this time, in modules  10  that are vertically adjacent, horizontal relative movement of upper module  10  to outer side of lower module  10  is controlled by touching inclination part  110  of lower engaging portion  106  of upper module  10  to inner edge of load receiving side  74  of lower module  10  from inner side. On the other hand, by touching the inclination part  110  of upper engaging portion  104  of lower module  10  to inner direction on inner edge  103  of load releasing side of upper module  10 , and by controlling the horizontal relative movement of upper module  10  is towards inner direction of lower module  10 . Generally, the relative movement to the outer side and inner side of the upper module  10  to the lower module  10  is controlled. 
     Especially, upper plate  12  and lower plate  14  are in L shaped. Solar panel P can be vertically stacked efficiently and stably since upper engaging portion  104  allotted to upper plate  12  and lower engaging portion  106  allotted to lower plate  14  is installed on each side where intersection part  108  is inserted and upper module  10  is surely horizontally positioned on lower module  10  by controlling the mutual orthogonal horizontal movement. 
     Next, for instance by the forklift as shown in  FIG. 8 , each palette of lowest edge is transported with two or more solar panels P vertically stacked. Solar panel P can be kept in a prescribed place while stacked. 
     When stacked solar panel P is unpacked, it is done in reverse order of stacking and unpacking can be done efficiently. Module  10  was allotted to four corners. Module  10  should be concurrently detached from multiple solar panels P in different locations and solar panel P is unpacked from palette. 
     According to module  10  used for the stacking of the product of the thin plate panel that has the composition. When upper thin plate panel is stacked on lower thin plate panel in the state where load releasing side  72  of upper module  10  is placed on load receiving side  74  of lower module  10 , module  10  can be smoothly put on lower module  10  without striking each other since horizontal offset arrangement of upper engaging portion  104  installed on inner edge  102  or outer edge of load receiving side  74  of lower module  10  and lower engaging portion installed on same side where upper engaging portion  104  of load releasing side  72  of upper module  10  is done. Moreover, neither upper engaging portion  104 , composing the positioning portion, nor lower engaging portion  106  is installed on load releasing side  72 ; and load receiving side  74  composing load transmission part of the thin plate panel can be vertically stacked efficiently and stably by separating the load transmission part and the positioning portion. The load transmission is done between upper and lower modules  10  with the load transmission area secured to its maximum. At the same time as the relative displacement to inner direction or outer direction of lower module  10  of upper module  10  is limited by upper engaging portion  104  of lower module  10 . The relative displacement to outer direction or inner direction of lower module  10  of upper module  10  is limited by lower engaging portion  106  of upper module  10 . Generally, upper module  10  is horizontally positioned in inner direction and outer direction of lower module  10 . 
     Second embodiment of this invention in detail is as follows. 
     In the following explanations, the explanation is omitted by fixing a similar reference number in the components similar to first embodiment. It explains the feature of this embodiment in detail. 
     The feature in this embodiment is in the supportive structure of solar panel P as showing in  FIG. 9 . In the first embodiment, the character section composed of inner side  111  of vertical wall  18  and upper plate  12  and lower plate  14  is used. The four corners of solar panel P are assumed to be put on support side having upper side of lower plate  14  in such trapped support form. In this embodiment, upper plate  12  is omitted though each four corners of solar panel P was trapped and supported. 
     In each four corners of sunlight panel P, solar panel P is pushed towards vertical wall  18  until it touches inner side  111  of vertical wall  18  corresponding to lateral side orthogonal to angle part of solar panel P. As for solar panel P, the lower side and each sides of the corner part are supported by inner side  111  corresponding to vertical wall  18  and support side of lower plate  14 . As compared to the first embodiment, four corners of solar panel P are supported as free edge where it is put on support side of lower plate  14 . 
     Frame is installed on rim part and four corners of frame are put on support side of lower plate  14 . In this case, it differs from embodiment 1, since upper plate  12  is omitted, it is possible to apply to the frames of various thickness as long as it doesn&#39;t lie to the bottom of upper engaging portion  104 . 
     On the other hand, when solar panel P is stacked up by using module  10 , in the first embodiment, though it was possible to allot module  10  to each four corners of each solar panel P of the accumulation schedule beforehand without installing module  10  of each solar panel P on the palette used for transportation. In this embodiment, only since solar panel P is put on the support side of lower plate  14  of module  10 , it is necessary to install module  10  of each solar panel P on the palette. 
     However, by stacking sunlight panel P from which module  10  is installed in each four corners, it is comparatively difficult to position the following module  10  corresponding to each module  10  of the highest edge on the palette at a time at the position that corresponds to each four corners of solar panel P on the palette, like the first embodiment when module  10  is stacked to the pillar-shaped. Sometimes some clearances (gutter) are demanded between modules  10 , but in this embodiment, since such a clearance is unnecessary, the stability of module  10  formed to the pillar-shaped of the accumulation can be secured more. 
     Though the embodiments of this invention are explained in detail above, if there are skilled persons, various corrections or changes are possible in the range in which it doesn&#39;t deviate from the range of this invention. 
     For instance, in this embodiment, as for module  10  stacked in each four corners of thin plate panel P, though it is explained that upper engaging portion  104  and lower engaging portion  106  are installed on inner edge  102  of load transmission area, module  10  installed on outside edge of load transmission side can be adopted for upper engaging portion  104  and lower engaging portion  106 . 
     In addition, in this embodiment, one or more sunlight panel P vertical direction stacking is used. Though it is stacked up in pillar-shaped in each four corners of two or more solar panels P by using the same module  10 , without being limited to it since there is a lot of number of sheets of sunlight panel P that supports module  10  of the lower layer and since the amount strength is demanded, module  10  with different thickness is prepared though externals are the same. Module  10  with more thickness than lower layer module  10  can be adopted. 
     EXPLANATION OF REFERENCE NUMBERS 
     
         
         
           
             P Solar panel 
             PC Palette 
             W Width 
             α Angle of inclination 
               10  Module 
               12  Upper plate 
               14  Plate 
               18  Vertical wall 
               20  Outer side 
               37  Upper side 
               39  Lower side 
               40  Strengthening ribs 
               43  Strengthening ribs 
               49  Lower edge 
               94  End face 
               95  End face 
               102  Inner edge 
               103  Inner edge 
               104  Upper engaging portion 
               106  Lower engaging portion 
               108  Intersection part 
               110  Inclination part 
               113  Inclination part 
               130  Dent